/* roulang page: index */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }

        /* Glass card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }

        /* Primary button */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        /* Secondary button */
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: rgba(46, 199, 255, 0.75);
            background: rgba(46, 199, 255, 0.08);
            color: #EAF6FF;
            box-shadow: 0 0 14px rgba(46, 199, 255, 0.2);
            transform: translateY(-1px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* Nav header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            transition: background var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-secondary);
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(46, 199, 255, 0.25), rgba(26, 157, 222, 0.15));
            border: 1px solid rgba(46, 199, 255, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.05rem;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 0.875rem;
            font-weight: 500;
            color: rgba(214, 244, 255, 0.72);
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--color-secondary);
            background: rgba(46, 199, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.12);
        }
        .nav-cta {
            display: none;
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: var(--color-secondary);
            font-size: 1.5rem;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast);
        }
        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.1);
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 88%;
            max-width: 400px;
            height: 100vh;
            height: 100dvh;
            background: linear-gradient(180deg, #071224 0%, #050B16 100%);
            z-index: 100;
            transition: right 250ms ease;
            display: flex;
            flex-direction: column;
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.55);
            border-left: 1px solid rgba(46, 199, 255, 0.2);
            overflow-y: auto;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(5, 11, 22, 0.65);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            z-index: 90;
            opacity: 0;
            pointer-events: none;
            transition: opacity 250ms ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            border-bottom: 1px solid rgba(46, 199, 255, 0.15);
        }
        .drawer-close {
            background: none;
            border: none;
            color: var(--color-secondary);
            font-size: 1.25rem;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast);
        }
        .drawer-close:hover {
            background: rgba(46, 199, 255, 0.12);
        }
        .drawer-nav {
            padding: 16px 20px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: 12px;
            color: rgba(214, 244, 255, 0.78);
            font-size: 1rem;
            font-weight: 500;
            transition: background var(--transition-fast), color var(--transition-fast);
            border: 1px solid transparent;
        }
        .drawer-nav a:hover {
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .drawer-nav a.active {
            background: rgba(46, 199, 255, 0.12);
            border-color: rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
        }
        .drawer-nav .nav-index {
            font-size: 0.7rem;
            font-weight: 700;
            color: rgba(46, 199, 255, 0.55);
            min-width: 20px;
            letter-spacing: 0.05em;
        }
        .drawer-cta {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(46, 199, 255, 0.15);
        }

        /* Section common */
        .section {
            padding: 96px 0;
            position: relative;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            max-width: 640px;
            line-height: 1.85;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(46, 199, 255, 0.08);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .section-label .label-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-primary);
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(1.6);
            }
        }

        /* Hero */
        .hero-section {
            min-height: 90vh;
            display: flex;
            align-items: center;
            padding: 96px 0 80px;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 11, 22, 0.92) 0%, rgba(7, 18, 36, 0.78) 45%, rgba(5, 11, 22, 0.95) 100%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.35);
            color: var(--color-primary);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            margin-bottom: 24px;
            animation: badge-float 3.5s ease-in-out infinite;
        }
        .hero-badge .badge-icon {
            font-size: 0.95rem;
        }
        @keyframes badge-float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-4px);
            }
        }
        .hero-title {
            font-size: clamp(2rem, 5vw, 4.25rem);
            font-weight: 800;
            line-height: 1.15;
            color: var(--color-text-hero);
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            max-width: 750px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, #2EC7FF 0%, #D6F4FF 60%, #2EC7FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.15rem;
            line-height: 1.85;
            color: rgba(222, 238, 250, 0.78);
            max-width: 580px;
            margin-bottom: 32px;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }
        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            max-width: 620px;
        }
        .hero-metric-card {
            background: rgba(11, 26, 46, 0.52);
            border: 1px solid rgba(46, 199, 255, 0.2);
            border-radius: 16px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: border-color var(--transition-fast);
        }
        .hero-metric-card:hover {
            border-color: rgba(46, 199, 255, 0.45);
        }
        .hero-metric-value {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .hero-metric-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            line-height: 1.4;
        }
        .hero-metric-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        /* Feature cards - asymmetric grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .feature-card {
            padding: 28px 22px;
            display: flex;
            flex-direction: column;
            gap: 14px;
            min-height: 200px;
        }
        .feature-card .feature-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(46, 199, 255, 0.15);
            line-height: 1;
            letter-spacing: -0.03em;
        }
        .feature-card .feature-icon-wrap {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(46, 199, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: 0;
            line-height: 1.4;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.75;
        }
        .feature-card:nth-child(1) {
            grid-column: span 2;
        }
        .feature-card:nth-child(2) {
            grid-column: span 2;
        }
        .feature-card:nth-child(3) {
            grid-column: span 1;
        }
        .feature-card:nth-child(4) {
            grid-column: span 3;
        }
        .feature-card .feature-cover {
            width: 100%;
            height: 120px;
            border-radius: 12px;
            object-fit: cover;
            margin-top: 6px;
        }

        /* Scenario */
        .scenario-section {
            background: linear-gradient(180deg, #071224 0%, #050B16 100%);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .scenario-info .section-title {
            margin-bottom: 16px;
        }
        .scenario-desc {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 32px;
        }
        .scenario-steps {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .scenario-step {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 16px 20px;
            border-radius: 16px;
            background: rgba(11, 26, 46, 0.35);
            border: 1px solid rgba(46, 199, 255, 0.15);
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }
        .scenario-step:hover {
            border-color: rgba(46, 199, 255, 0.4);
            background: rgba(11, 26, 46, 0.55);
        }
        .scenario-step-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .scenario-step h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: 0 0 4px;
        }
        .scenario-step p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.7;
        }
        .scenario-cover {
            width: 100%;
            height: auto;
            border-radius: var(--radius-glass);
            object-fit: cover;
            border: 1px solid rgba(46, 199, 255, 0.2);
            box-shadow: var(--shadow-glass);
        }

        /* Cases */
        .cases-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .case-card {
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .case-metrics {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .case-metric .metric-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-success);
            line-height: 1.2;
        }
        .case-metric .metric-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .case-quote {
            font-size: 0.95rem;
            color: rgba(222, 238, 250, 0.78);
            line-height: 1.8;
            margin: 0;
        }
        .case-divider {
            width: 100%;
            height: 1px;
            background: rgba(46, 199, 255, 0.15);
            margin: 4px 0;
        }
        .case-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }
        .case-brand .brand-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.18);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        /* Price */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .price-card {
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            gap: 18px;
            position: relative;
        }
        .price-card.featured {
            border-color: rgba(46, 199, 255, 0.6);
            box-shadow: 0 0 32px rgba(46, 199, 255, 0.22), var(--shadow-glass);
            transform: translateY(-8px);
        }
        .price-card.featured:hover {
            transform: translateY(-10px);
        }
        .price-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 5px 14px;
            border-radius: 999px;
            background: rgba(46, 199, 255, 0.15);
            color: var(--color-primary);
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.06em;
        }
        .price-card .price-name {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--color-text-heading);
        }
        .price-card .price-value {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-warning);
            line-height: 1.2;
        }
        .price-card .price-value .currency {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-text-muted);
        }
        .price-card .price-period {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .price-features {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .price-features li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(222, 238, 250, 0.72);
        }
        .price-features li .check-icon {
            color: var(--color-success);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .price-card .price-cta {
            margin-top: auto;
        }

        /* News */
        .news-section {
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
        }
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px 24px;
            border-radius: 16px;
            background: rgba(11, 26, 46, 0.4);
            border: 1px solid rgba(46, 199, 255, 0.15);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
        }
        .news-item:hover {
            border-color: rgba(46, 199, 255, 0.4);
            background: rgba(11, 26, 46, 0.6);
            transform: translateX(4px);
        }
        .news-date {
            min-width: 72px;
            font-size: 0.78rem;
            color: var(--color-text-muted);
            font-weight: 600;
            padding-top: 2px;
        }
        .news-content h4 {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: 0 0 6px;
        }
        .news-content p {
            font-size: 0.87rem;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.75;
        }
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-sidebar-card {
            padding: 24px;
        }
        .news-sidebar-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: 0 0 12px;
        }
        .news-sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .news-sidebar-list a {
            font-size: 0.85rem;
            color: rgba(214, 244, 255, 0.7);
            transition: color var(--transition-fast);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .news-sidebar-list a:hover {
            color: var(--color-primary);
        }
        .news-sidebar-list a::before {
            content: '→';
            color: rgba(46, 199, 255, 0.5);
            font-size: 0.8rem;
        }

        /* Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .review-card {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .review-stars {
            color: var(--color-warning);
            font-size: 0.85rem;
            letter-spacing: 2px;
        }
        .review-text {
            font-size: 0.9rem;
            color: rgba(222, 238, 250, 0.75);
            line-height: 1.8;
            margin: 0;
            flex: 1;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }
        .review-author .review-avatar {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        /* Brand intro + partners */
        .brand-section {
            background: linear-gradient(180deg, #071224 0%, #050B16 100%);
        }
        .brand-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .brand-intro {
            padding: 32px;
        }
        .brand-intro h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin: 0 0 16px;
        }
        .brand-intro p {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            line-height: 1.9;
            margin: 0 0 14px;
        }
        .partner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .partner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 12px;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.2);
            font-size: 0.85rem;
            color: var(--color-secondary);
            font-weight: 500;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }
        .partner-tag:hover {
            border-color: rgba(46, 199, 255, 0.5);
            background: rgba(11, 26, 46, 0.7);
        }
        .partner-tag .tag-icon {
            color: var(--color-primary);
            font-size: 0.8rem;
        }

        /* FAQ */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: start;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            border-radius: 16px;
            overflow: hidden;
            background: rgba(11, 26, 46, 0.35);
            border: 1px solid rgba(46, 199, 255, 0.15);
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }
        .faq-item.open {
            border-color: rgba(46, 199, 255, 0.5);
            background: rgba(11, 26, 46, 0.55);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 22px;
            background: none;
            border: none;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            cursor: pointer;
            transition: color var(--transition-fast);
            min-height: 56px;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-arrow {
            font-size: 0.9rem;
            color: var(--color-primary);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 300ms ease, padding 300ms ease;
            padding: 0 22px;
            font-size: 0.9rem;
            color: rgba(214, 244, 255, 0.72);
            line-height: 1.85;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* CTA */
        .cta-banner {
            border-radius: 28px;
            padding: 56px 48px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 11, 22, 0.85) 0%, rgba(7, 18, 36, 0.72) 50%, rgba(5, 11, 22, 0.9) 100%);
            border-radius: 28px;
        }
        .cta-banner .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-banner h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.6rem);
            font-weight: 700;
            color: var(--color-text-hero);
            margin: 0 0 16px;
        }
        .cta-banner p {
            font-size: 1rem;
            color: rgba(222, 238, 250, 0.75);
            margin: 0 auto 32px;
            max-width: 480px;
            line-height: 1.8;
        }
        .cta-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* Footer */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.15);
            padding: 48px 0 32px;
            margin-top: 96px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(214, 244, 255, 0.5);
            line-height: 1.8;
            margin: 12px 0 0;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 0.85rem;
            color: rgba(214, 244, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: rgba(214, 244, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(214, 244, 255, 0.5);
            font-size: 0.78rem;
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        .footer-bottom .sep {
            color: rgba(214, 244, 255, 0.3);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-card:nth-child(1),
            .feature-card:nth-child(2),
            .feature-card:nth-child(3),
            .feature-card:nth-child(4) {
                grid-column: span 1;
            }
            .feature-card:nth-child(4) {
                grid-column: span 2;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-grid {
                grid-template-columns: 1fr;
            }
            .faq-layout {
                grid-template-columns: 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .price-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .price-card.featured {
                transform: none;
            }
            .price-card.featured:hover {
                transform: translateY(-4px);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            :root {
                --section-spacing: 56px;
            }
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: inline-flex;
            }
            .hamburger-btn {
                display: flex;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card:nth-child(1),
            .feature-card:nth-child(2),
            .feature-card:nth-child(3),
            .feature-card:nth-child(4) {
                grid-column: span 1;
            }
            .cases-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .price-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-section {
                padding: 64px 0 56px;
                min-height: auto;
            }
            .hero-metrics {
                gap: 10px;
            }
            .hero-metric-card {
                padding: 12px 16px;
                width: calc(50% - 5px);
            }
            .cta-banner {
                padding: 36px 24px;
                border-radius: 20px;
            }
            .news-item {
                flex-direction: column;
                gap: 10px;
                padding: 16px 18px;
            }
            .news-date {
                min-width: auto;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: clamp(1.6rem, 6vw, 2.2rem);
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-cta-group {
                flex-direction: column;
                width: 100%;
            }
            .hero-cta-group .btn-primary,
            .hero-cta-group .btn-secondary {
                width: 100%;
            }
            .hero-metric-card {
                flex-direction: column;
                align-items: flex-start;
                width: 100%;
                gap: 6px;
            }
            .hero-metrics {
                flex-direction: column;
            }
            .section-title {
                font-size: clamp(1.3rem, 5vw, 1.8rem);
            }
            .feature-card {
                padding: 20px 16px;
            }
            .price-card {
                padding: 24px 20px;
            }
            .cta-banner h2 {
                font-size: 1.4rem;
            }
            .cta-btn-group {
                flex-direction: column;
                width: 100%;
            }
            .cta-btn-group .btn-primary,
            .cta-btn-group .btn-secondary {
                width: 100%;
            }
            .glass-card {
                border-radius: 18px;
            }
            .review-card {
                padding: 18px 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }

        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            box-shadow: 0 0 18px rgba(46, 199, 255, 0.2);
            transform: translateY(-1px);
            color: var(--color-secondary);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            transition: background var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            gap: 28px;
            min-height: 72px;
            flex-wrap: nowrap;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--color-text-hero);
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo-link:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 0.875rem;
            font-weight: 500;
            color: rgba(214, 244, 255, 0.72);
            white-space: nowrap;
            border-radius: 8px;
            transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--color-secondary);
            background: rgba(46, 199, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.1);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 4px 4px 0 0;
            box-shadow: 0 0 12px rgba(46, 199, 255, 0.5);
        }
        .nav-cta {
            flex-shrink: 0;
        }

        .hamburger-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.3);
            border-radius: 10px;
            color: var(--color-secondary);
            font-size: 1.25rem;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }
        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.1);
            border-color: var(--color-border-hover);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 85vw;
            background: rgba(7, 18, 36, 0.97);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-left: 1px solid rgba(46, 199, 255, 0.2);
            z-index: 200;
            padding: 24px 20px;
            flex-direction: column;
            gap: 8px;
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
            transform: translateX(100%);
            transition: transform var(--transition-base);
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        .mobile-menu-close {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.25);
            border-radius: 10px;
            color: var(--color-secondary);
            font-size: 1.1rem;
            align-self: flex-end;
            margin-bottom: 16px;
            transition: background var(--transition-fast);
        }
        .mobile-menu-close:hover {
            background: rgba(46, 199, 255, 0.2);
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(214, 244, 255, 0.78);
            border-radius: 10px;
            transition: background var(--transition-fast), color var(--transition-fast);
            border: 1px solid transparent;
        }
        .mobile-menu a:hover {
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .mobile-menu a.active {
            background: rgba(46, 199, 255, 0.12);
            color: var(--color-primary);
            border-color: rgba(46, 199, 255, 0.25);
        }
        .mobile-menu .mobile-cta {
            margin-top: auto;
            justify-content: center;
        }
        .menu-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 150;
        }
        .menu-overlay.open {
            display: block;
        }

        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.1);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
        }
        .footer-brand p {
            font-size: 0.875rem;
            color: rgba(214, 244, 255, 0.56);
            margin-top: 14px;
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 9px;
        }
        .footer-col ul li a {
            font-size: 0.875rem;
            color: rgba(214, 244, 255, 0.62);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px 20px;
            font-size: 0.78rem;
            color: rgba(214, 244, 255, 0.42);
        }
        .footer-bottom a {
            font-size: 0.78rem;
            color: rgba(214, 244, 255, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        .sep {
            color: rgba(214, 244, 255, 0.25);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(214, 244, 255, 0.5);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(214, 244, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .sep {
            color: rgba(214, 244, 255, 0.3);
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        .section-spacing {
            padding: 64px 0;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.3;
            letter-spacing: 0.01em;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            max-width: 560px;
            line-height: 1.8;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 13px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .stat-number {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            color: var(--color-success);
            letter-spacing: -0.02em;
            line-height: 1.15;
        }
        .stat-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        .service-card-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.22);
            color: var(--color-primary);
            font-size: 1.15rem;
            flex-shrink: 0;
        }
        .service-card-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: rgba(46, 199, 255, 0.15);
            line-height: 1;
            letter-spacing: -0.03em;
            user-select: none;
        }
        .card-img-top {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 14px;
            border: 1px solid rgba(46, 199, 255, 0.12);
        }

        .step-indicator {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.35);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
            margin-bottom: 12px;
        }
        .faq-item.open {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.72);
            box-shadow: var(--shadow-glass);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 20px;
            background: transparent;
            border: none;
            text-align: left;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            transition: color var(--transition-fast);
            min-height: 56px;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(46, 199, 255, 0.2);
            color: var(--color-text-muted);
            font-size: 0.7rem;
            transition: transform var(--transition-base), border-color var(--transition-fast), color var(--transition-fast);
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 20px;
            color: rgba(214, 244, 255, 0.72);
            font-size: 0.875rem;
            line-height: 1.9;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 20px;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .nav-cta {
                display: none;
            }
            .section-spacing {
                padding: 48px 0;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
                margin-left: auto;
            }
            .mobile-menu {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-header .container {
                min-height: 60px;
                gap: 12px;
            }
            .logo-link {
                font-size: 1rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.85rem;
            }
            .section-spacing {
                padding: 40px 0;
            }
            .card-img-top {
                height: 140px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 0.85rem;
                min-height: 42px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .card-img-top {
                height: 130px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }
        @media (max-width: 768px) {
            :root {
                --section-spacing: 56px;
                --gap-card: 16px;
            }
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
            z-index: 1;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: rgba(46, 199, 255, 0.75);
            background: rgba(46, 199, 255, 0.08);
            box-shadow: 0 0 16px rgba(46, 199, 255, 0.18);
            transform: translateY(-1px);
            color: var(--color-secondary);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            min-height: 68px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.15rem;
            color: #F4F9FF;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .logo-link:hover {
            color: #D6F4FF;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(46, 199, 255, 0.18) 0%, rgba(26, 157, 222, 0.25) 100%);
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 16px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-links a {
            color: rgba(214, 244, 255, 0.68);
            font-size: 0.86rem;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: 999px;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--color-secondary);
            background: rgba(46, 199, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.1);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            border-radius: 4px;
            background: var(--color-primary);
            box-shadow: 0 0 10px rgba(46, 199, 255, 0.6);
        }
        .nav-cta {
            margin-left: auto;
            flex-shrink: 0;
        }
        .hamburger-btn {
            display: none;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.35);
            color: #D6F4FF;
            border-radius: 10px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            margin-left: auto;
            flex-shrink: 0;
        }
        .hamburger-btn:hover {
            border-color: rgba(46, 199, 255, 0.7);
            background: rgba(46, 199, 255, 0.08);
        }
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 85vw;
            background: linear-gradient(180deg, #06101F 0%, #08182C 100%);
            border-left: 1px solid rgba(46, 199, 255, 0.2);
            z-index: 200;
            transform: translateX(100%);
            transition: transform 250ms ease;
            display: flex;
            flex-direction: column;
            padding: 20px;
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }
        .drawer-close {
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: #D6F4FF;
            border-radius: 10px;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: border-color var(--transition-fast);
        }
        .drawer-close:hover {
            border-color: rgba(46, 199, 255, 0.7);
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .drawer-nav a {
            color: rgba(214, 244, 255, 0.72);
            font-size: 1rem;
            font-weight: 500;
            padding: 14px 16px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background var(--transition-fast), color var(--transition-fast);
            border: 1px solid transparent;
        }
        .drawer-nav a:hover {
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .drawer-nav a.active {
            background: rgba(46, 199, 255, 0.1);
            color: var(--color-primary);
            border-color: rgba(46, 199, 255, 0.2);
            font-weight: 600;
        }
        .drawer-nav a .nav-idx {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.1);
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        .drawer-cta {
            margin-top: auto;
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 150;
            opacity: 0;
            pointer-events: none;
            transition: opacity 250ms ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
            }
        }
        @media (min-width: 1025px) {
            .hamburger-btn {
                display: none;
            }
            .mobile-drawer {
                display: none;
            }
            .drawer-overlay {
                display: none;
            }
        }
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.12);
            padding: 56px 0 24px;
            margin-top: var(--section-spacing);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            color: rgba(214, 244, 255, 0.56);
            font-size: 0.89rem;
            margin-top: 16px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--color-primary);
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(214, 244, 255, 0.6);
            font-size: 0.89rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            color: rgba(214, 244, 255, 0.4);
            font-size: 0.8rem;
        }
        .footer-bottom a {
            color: rgba(214, 244, 255, 0.5);
            font-size: 0.8rem;
        }
        .footer-bottom a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom .sep {
            color: rgba(214, 244, 255, 0.25);
            margin: 0 4px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(214, 244, 255, 0.5);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(214, 244, 255, 0.55);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .sep {
            color: rgba(214, 244, 255, 0.25);
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }
        .hero-banner {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(46, 199, 255, 0.15);
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 11, 22, 0.92) 0%, rgba(7, 18, 36, 0.78) 50%, rgba(5, 11, 22, 0.9) 100%);
            z-index: 1;
        }
        .hero-banner .container {
            position: relative;
            z-index: 2;
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .hero-badge-row {
            display: flex;
            gap: 12px;
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.3);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-primary);
            white-space: nowrap;
        }
        .hero-badge .badge-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-success);
            box-shadow: 0 0 8px rgba(39, 224, 165, 0.8);
        }
        .hero-title {
            font-size: clamp(2rem, 5vw, 4.25rem);
            font-weight: 800;
            line-height: 1.15;
            color: var(--color-text-hero);
            margin-bottom: 20px;
            letter-spacing: -0.01em;
        }
        .hero-title .highlight {
            color: var(--color-primary);
            text-shadow: 0 0 30px rgba(46, 199, 255, 0.4);
        }
        .hero-desc {
            font-size: 1.1rem;
            color: rgba(214, 244, 255, 0.72);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .hero-stats-row {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(214, 244, 255, 0.6);
            font-size: 0.85rem;
        }
        .hero-stat-item i {
            color: var(--color-primary);
            font-size: 0.9rem;
        }
        .hero-glass-card {
            position: absolute;
            right: 24px;
            bottom: 32px;
            z-index: 2;
            width: 320px;
            max-width: calc(100% - 48px);
            background: rgba(9, 18, 36, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.25);
            border-radius: 20px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            padding: 20px 24px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
        }
        .hero-glass-card .hg-title {
            font-size: 0.8rem;
            color: var(--color-primary);
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-glass-card .hg-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .hero-glass-card .hg-list-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(214, 244, 255, 0.7);
        }
        .hero-glass-card .hg-list-item i {
            color: var(--color-success);
            font-size: 0.75rem;
            flex-shrink: 0;
        }
        @media (max-width: 1024px) {
            .hero-glass-card {
                position: static;
                width: 100%;
                max-width: 100%;
                margin-top: 24px;
            }
            .hero-banner {
                min-height: auto;
            }
        }
        .toolbar-section {
            padding-top: 40px;
            padding-bottom: 20px;
        }
        .toolbar-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .seg-control {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(11, 26, 46, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.15);
            border-radius: 999px;
            padding: 4px;
            flex-wrap: wrap;
        }
        .seg-btn {
            padding: 8px 18px;
            border-radius: 999px;
            border: none;
            background: transparent;
            color: rgba(214, 244, 255, 0.6);
            font-size: 0.82rem;
            font-weight: 600;
            transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }
        .seg-btn:hover {
            color: var(--color-secondary);
            background: rgba(46, 199, 255, 0.08);
        }
        .seg-btn.active {
            background: rgba(46, 199, 255, 0.15);
            color: var(--color-primary);
            box-shadow: 0 0 14px rgba(46, 199, 255, 0.2);
        }
        .sort-select {
            background: rgba(11, 26, 46, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.25);
            border-radius: 999px;
            padding: 10px 20px;
            color: rgba(214, 244, 255, 0.7);
            font-size: 0.82rem;
            font-weight: 500;
            appearance: none;
            -webkit-appearance: none;
            cursor: pointer;
            min-width: 140px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%232EC7FF' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            padding-right: 40px;
        }
        .sort-select:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        .cards-section {
            padding-bottom: 20px;
        }
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .content-card {
            cursor: pointer;
            transition: all var(--transition-base);
        }
        .content-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 18px 18px 0 0;
            margin: -1px -1px 0 -1px;
        }
        .content-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .content-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .content-card .card-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 11, 22, 0.1) 40%, rgba(5, 11, 22, 0.7) 100%);
            pointer-events: none;
        }
        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(5, 11, 22, 0.7);
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .content-card .card-body {
            padding: 20px 22px 22px;
        }
        .content-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .content-card .card-desc {
            font-size: 0.87rem;
            color: rgba(214, 244, 255, 0.6);
            line-height: 1.75;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: rgba(214, 244, 255, 0.4);
            padding-top: 12px;
            border-top: 1px solid rgba(46, 199, 255, 0.08);
        }
        .content-card .card-meta .read-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.8rem;
            transition: color var(--transition-fast);
        }
        .content-card .card-meta .read-link:hover {
            color: #5ad4ff;
        }
        .content-card .card-meta .read-link i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }
        .content-card:hover .card-meta .read-link i {
            transform: translateX(3px);
        }
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .pagination-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 24px 0 8px;
            flex-wrap: wrap;
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid rgba(46, 199, 255, 0.25);
            background: rgba(11, 26, 46, 0.4);
            color: rgba(214, 244, 255, 0.65);
            font-size: 0.85rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            padding: 0 14px;
        }
        .page-btn:hover {
            border-color: rgba(46, 199, 255, 0.55);
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .page-btn.active {
            border-color: var(--color-primary);
            background: rgba(46, 199, 255, 0.15);
            color: var(--color-primary);
            box-shadow: 0 0 16px rgba(46, 199, 255, 0.3);
        }
        .page-btn.page-dots {
            border-color: transparent;
            background: transparent;
            cursor: default;
        }
        .page-btn.page-dots:hover {
            background: transparent;
            border-color: transparent;
            color: rgba(214, 244, 255, 0.5);
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: rgba(214, 244, 255, 0.55);
            margin-bottom: 36px;
            max-width: 680px;
            line-height: 1.8;
        }
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .capability-item {
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .capability-item .cap-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.2rem;
            margin-bottom: 6px;
        }
        .capability-item .cap-name {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text-heading);
        }
        .capability-item .cap-desc {
            font-size: 0.85rem;
            color: rgba(214, 244, 255, 0.55);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .capability-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 640px) {
            .capability-grid {
                grid-template-columns: 1fr;
            }
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            padding: 24px;
            position: relative;
            counter-increment: step;
        }
        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            font-size: 1rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .process-step .step-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
        }
        .process-step .step-desc {
            font-size: 0.84rem;
            color: rgba(214, 244, 255, 0.55);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 640px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }
        .stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            padding: 28px 24px;
        }
        .stat-block {
            text-align: center;
            padding: 12px;
        }
        .stat-block .stat-num {
            font-size: clamp(1.8rem, 3vw, 2.6rem);
            font-weight: 800;
            color: var(--color-success);
            margin-bottom: 4px;
            letter-spacing: -0.01em;
        }
        .stat-block .stat-label {
            font-size: 0.82rem;
            color: rgba(214, 244, 255, 0.55);
        }
        @media (max-width: 768px) {
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
                padding: 20px 16px;
            }
        }
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 1.8fr;
            gap: 40px;
            align-items: start;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border-radius: 18px;
            overflow: hidden;
            transition: border-color var(--transition-fast), background var(--transition-fast);
            border: 1px solid rgba(46, 199, 255, 0.18);
            background: rgba(11, 26, 46, 0.45);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .faq-item.active {
            border-color: rgba(46, 199, 255, 0.5);
            background: rgba(11, 26, 46, 0.65);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--color-text-heading);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            min-height: 56px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(46, 199, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 0.75rem;
            transition: transform var(--transition-fast), border-color var(--transition-fast);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
            border-color: rgba(46, 199, 255, 0.6);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 300ms ease, padding 300ms ease;
            padding: 0 20px;
            color: rgba(214, 244, 255, 0.68);
            font-size: 0.88rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding-bottom: 20px;
        }
        @media (max-width: 1024px) {
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .cta-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-radius: 26px;
            overflow: hidden;
            padding: 56px 48px;
            border: 1px solid rgba(46, 199, 255, 0.25);
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 11, 22, 0.88) 0%, rgba(7, 18, 36, 0.72) 60%, rgba(5, 11, 22, 0.9) 100%);
            z-index: 1;
        }
        .cta-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-banner .cta-title {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--color-text-hero);
            margin-bottom: 12px;
        }
        .cta-banner .cta-desc {
            color: rgba(214, 244, 255, 0.65);
            font-size: 0.95rem;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-banner .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        @media (max-width: 640px) {
            .cta-banner {
                padding: 40px 20px;
            }
        }
        .section-spacing {
            margin-top: var(--section-spacing);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }
        .tag-cloud .tag-pill {
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.2);
            color: rgba(214, 244, 255, 0.62);
            font-size: 0.8rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .tag-cloud .tag-pill:hover {
            border-color: rgba(46, 199, 255, 0.5);
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

/* roulang page: category3 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: #5ad4ff;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            padding: 0;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: flex-start;
            gap: 20px;
            min-height: 68px;
            flex-wrap: nowrap;
        }

        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--color-text-hero);
            font-weight: 700;
            font-size: 1rem;
            white-space: nowrap;
            text-decoration: none;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .logo-link:hover {
            color: var(--color-primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.3);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            border-radius: 8px;
            color: var(--color-text-muted);
            font-size: 0.875rem;
            font-weight: 500;
            white-space: nowrap;
            text-decoration: none;
            transition: color var(--transition-fast), background var(--transition-fast);
            position: relative;
        }

        .nav-links a:hover {
            color: var(--color-secondary);
            background: rgba(46, 199, 255, 0.08);
        }

        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.12);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 3px;
            border-radius: 2px;
            background: var(--color-primary);
            box-shadow: 0 0 8px rgba(46, 199, 255, 0.5);
        }

        .nav-cta {
            margin-left: auto;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .hamburger-btn {
            display: none;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.3);
            border-radius: 10px;
            color: var(--color-secondary);
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }

        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.1);
            border-color: rgba(46, 199, 255, 0.55);
        }

        /* Mobile drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 100%;
            max-width: 380px;
            background: linear-gradient(180deg, #050B16 0%, #0B1A2E 100%);
            z-index: 200;
            transform: translateX(100%);
            transition: transform 250ms ease;
            border-left: 1px solid rgba(46, 199, 255, 0.25);
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.6);
            overflow-y: auto;
            padding: 20px 24px 32px;
            display: flex;
            flex-direction: column;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .drawer-close-btn {
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.3);
            border-radius: 10px;
            color: var(--color-secondary);
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }

        .drawer-close-btn:hover {
            background: rgba(46, 199, 255, 0.1);
            border-color: rgba(46, 199, 255, 0.55);
        }

        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: 12px;
            color: var(--color-text-body);
            font-size: 0.95rem;
            font-weight: 500;
            text-decoration: none;
            border: 1px solid transparent;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }

        .drawer-nav a:hover,
        .drawer-nav a.active {
            background: rgba(46, 199, 255, 0.08);
            border-color: rgba(46, 199, 255, 0.2);
            color: var(--color-primary);
        }

        .drawer-nav a .nav-index {
            font-size: 0.75rem;
            color: var(--color-primary);
            font-weight: 700;
            width: 24px;
            flex-shrink: 0;
        }

        .drawer-cta {
            margin-top: auto;
            padding-top: 24px;
            border-top: 1px solid rgba(46, 199, 255, 0.15);
            display: flex;
            gap: 12px;
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(5, 11, 22, 0.7);
            z-index: 190;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .drawer-overlay.open {
            display: block;
        }

        /* Glass card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }

        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }

        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
            text-decoration: none;
        }

        .btn-secondary:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            color: #ffffff;
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        /* Section spacing */
        .section {
            padding-top: var(--section-spacing);
            padding-bottom: var(--section-spacing);
        }

        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.1rem);
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.3;
            margin-top: 0;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-muted);
            margin-top: 0;
            margin-bottom: 0;
            max-width: 680px;
            line-height: 1.8;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--color-primary);
        }

        .breadcrumb .separator {
            color: rgba(214, 244, 255, 0.3);
        }

        .breadcrumb .current {
            color: var(--color-primary);
        }

        /* Tag */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-primary);
            white-space: nowrap;
        }

        .tag-success {
            background: rgba(39, 224, 165, 0.1);
            border-color: rgba(39, 224, 165, 0.3);
            color: var(--color-success);
        }

        .tag-warning {
            background: rgba(255, 184, 77, 0.1);
            border-color: rgba(255, 184, 77, 0.3);
            color: var(--color-warning);
        }

        /* Page banner */
        .page-banner {
            position: relative;
            padding: 72px 0 64px;
            background-image: linear-gradient(rgba(5, 11, 22, 0.88) 0%, rgba(7, 18, 36, 0.72) 50%, rgba(5, 11, 22, 0.92) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(46, 199, 255, 0.12);
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .page-banner h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            color: var(--color-text-hero);
            line-height: 1.2;
            margin: 16px 0 16px;
        }

        .page-banner .banner-desc {
            font-size: 1rem;
            color: var(--color-text-body);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Feature highlight card */
        .feature-highlight-card {
            padding: 28px;
            border-radius: var(--radius-glass);
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        }

        .feature-highlight-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }

        .feature-highlight-card .card-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(46, 199, 255, 0.15);
            line-height: 1;
            margin-bottom: 12px;
        }

        .feature-highlight-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: 0 0 10px;
            line-height: 1.4;
        }

        .feature-highlight-card p {
            font-size: 0.9rem;
            color: var(--color-text-body);
            margin: 0;
            line-height: 1.7;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 28px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, rgba(46, 199, 255, 0.5) 0%, rgba(46, 199, 255, 0.05) 100%);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 32px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--color-primary);
            border: 2px solid rgba(46, 199, 255, 0.3);
            box-shadow: 0 0 12px rgba(46, 199, 255, 0.4);
        }

        .timeline-item .timeline-date {
            font-size: 0.8rem;
            color: var(--color-primary);
            font-weight: 600;
            margin-bottom: 6px;
        }

        .timeline-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .timeline-item p {
            font-size: 0.9rem;
            color: var(--color-text-body);
            margin: 0;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid rgba(46, 199, 255, 0.18);
            border-radius: 16px;
            background: rgba(11, 26, 46, 0.45);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: border-color var(--transition-fast), background var(--transition-fast);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: rgba(46, 199, 255, 0.4);
        }

        .faq-item.active {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
        }

        .faq-button {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 22px;
            background: transparent;
            border: none;
            color: var(--color-text-heading);
            font-weight: 600;
            font-size: 0.95rem;
            text-align: left;
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

        .faq-button:hover {
            color: var(--color-primary);
        }

        .faq-button .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(46, 199, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 0.7rem;
            transition: transform 200ms ease, border-color var(--transition-fast);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            border-color: var(--color-primary);
        }

        .faq-panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height 250ms ease;
        }

        .faq-panel-inner {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--color-text-body);
            line-height: 1.8;
        }

        /* CTA banner */
        .cta-banner {
            position: relative;
            border-radius: var(--radius-glass);
            padding: 56px 40px;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.25);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 60%;
            height: 180%;
            background: radial-gradient(ellipse, rgba(46, 199, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-banner .container-cta {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-banner h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--color-text-hero);
            margin: 0 0 12px;
            line-height: 1.3;
        }

        .cta-banner p {
            font-size: 1rem;
            color: var(--color-text-body);
            margin: 0 auto 28px;
            max-width: 560px;
            line-height: 1.8;
        }

        .cta-banner .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Grid helpers */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gap-card);
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card);
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap-card);
        }

        /* Footer */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.12);
            padding-top: 56px;
            padding-bottom: 24px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .site-footer .footer-brand p {
            font-size: 0.875rem;
            color: var(--color-text-muted);
            margin-top: 12px;
            line-height: 1.7;
            max-width: 320px;
        }

        .site-footer .footer-col h4 {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 14px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .site-footer .footer-col ul a {
            font-size: 0.875rem;
            color: var(--color-text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-col ul a:hover {
            color: var(--color-primary);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.08);
            padding-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 0.75rem;
            color: rgba(214, 244, 255, 0.4);
        }

        .site-footer .footer-bottom a {
            color: rgba(214, 244, 255, 0.4);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--color-primary);
        }

        .site-footer .sep {
            color: rgba(214, 244, 255, 0.2);
            margin: 0 4px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }

            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .site-footer .footer-brand {
                grid-column: span 2;
            }

            .nav-cta {
                display: none;
            }

            .nav-links {
                gap: 2px;
            }

            .nav-links a {
                padding: 8px 10px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 640px) {
            :root {
                --section-spacing: 56px;
                --gap-card: 16px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .site-header .container {
                min-height: 56px;
                gap: 10px;
            }

            .nav-links {
                display: none;
            }

            .hamburger-btn {
                display: flex;
                margin-left: auto;
            }

            .nav-cta {
                display: none;
            }

            .mobile-drawer {
                display: flex;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer .footer-brand {
                grid-column: span 1;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .page-banner {
                padding: 48px 0 40px;
            }

            .page-banner h1 {
                font-size: 1.6rem;
            }

            .cta-banner {
                padding: 36px 20px;
            }

            .cta-banner .btn-group {
                flex-direction: column;
                gap: 10px;
            }

            .timeline {
                padding-left: 22px;
            }

            .timeline-item::before {
                left: -18px;
                width: 10px;
                height: 10px;
            }

            .faq-button {
                padding: 16px 16px;
                font-size: 0.875rem;
            }

            .faq-panel-inner {
                padding: 0 16px 16px;
                font-size: 0.85rem;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }
        @media (max-width: 768px) {
            :root {
                --section-spacing: 56px;
                --gap-card: 16px;
            }
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Glass card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
            z-index: 1;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }
        .glass-card-static {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            position: relative;
            overflow: hidden;
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
        }
        .glass-card-static::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
            z-index: 1;
        }

        /* Primary button */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        /* Secondary button */
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            box-shadow: 0 0 14px rgba(46, 199, 255, 0.15);
            transform: translateY(-1px);
            color: #ffffff;
        }
        .btn-secondary:active {
            transform: translateY(0);
            background: rgba(46, 199, 255, 0.05);
        }

        /* Tag */
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            border: 1px solid rgba(46, 199, 255, 0.35);
            color: #9ee8ff;
            background: rgba(46, 199, 255, 0.08);
            white-space: nowrap;
        }
        .tag-solid {
            background: var(--color-primary);
            color: #04101E;
            border-color: var(--color-primary);
            font-weight: 700;
        }
        .tag-outline {
            background: transparent;
            border-color: rgba(46, 199, 255, 0.35);
            color: var(--color-secondary);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .sep {
            color: rgba(214, 244, 255, 0.3);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        /* Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            transition: background var(--transition-base), border-color var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(5, 11, 22, 0.92);
            border-bottom-color: rgba(46, 199, 255, 0.32);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            gap: 20px;
            min-height: 68px;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--color-text-hero);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: #ffffff;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(46, 199, 255, 0.18) 0%, rgba(26, 157, 222, 0.08) 100%);
            border: 1px solid rgba(46, 199, 255, 0.35);
            color: var(--color-primary);
            font-size: 1rem;
            flex-shrink: 0;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }
        .logo-link:hover .logo-icon {
            border-color: var(--color-primary);
            background: rgba(46, 199, 255, 0.12);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 24px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            padding: 8px 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: 999px;
            transition: color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
            position: relative;
        }
        .nav-links a:hover {
            color: #ffffff;
            background: rgba(46, 199, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.12);
            font-weight: 600;
            box-shadow: inset 0 0 0 1px rgba(46, 199, 255, 0.25);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .hamburger-btn {
            display: none;
            background: rgba(46, 199, 255, 0.08);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-secondary);
            width: 44px;
            height: 44px;
            border-radius: 12px;
            font-size: 1.15rem;
            align-items: center;
            justify-content: center;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
            flex-shrink: 0;
            margin-left: auto;
        }
        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.15);
            border-color: var(--color-primary);
            color: #ffffff;
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            max-width: 400px;
            height: 100vh;
            background: linear-gradient(180deg, #050B16 0%, #0A1A2E 100%);
            z-index: 200;
            display: flex;
            flex-direction: column;
            padding: 24px;
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            border-left: 1px solid rgba(46, 199, 255, 0.2);
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.6);
            overflow-y: auto;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(0, 0, 0, 0.6);
            z-index: 199;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
            border: none;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
        }
        .drawer-close-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(46, 199, 255, 0.08);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-secondary);
            font-size: 1.1rem;
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .drawer-close-btn:hover {
            background: rgba(46, 199, 255, 0.15);
            color: #ffffff;
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .drawer-nav a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 18px;
            border-radius: 14px;
            color: var(--color-text-body);
            font-weight: 500;
            font-size: 0.95rem;
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .drawer-nav a .nav-index {
            font-size: 0.7rem;
            color: var(--color-text-muted);
            font-weight: 600;
            letter-spacing: 0.06em;
        }
        .drawer-nav a:hover {
            background: rgba(46, 199, 255, 0.08);
            color: #ffffff;
        }
        .drawer-nav a.active {
            background: rgba(46, 199, 255, 0.12);
            color: var(--color-primary);
            font-weight: 600;
        }
        .drawer-nav a.active .nav-index {
            color: var(--color-primary);
        }
        .drawer-cta {
            margin-top: 24px;
            width: 100%;
        }
        .drawer-cta .btn-primary {
            width: 100%;
            min-height: 52px;
            font-size: 1rem;
        }

        /* Category hero */
        .category-hero {
            position: relative;
            padding: 80px 0 48px;
            background-image: linear-gradient(180deg, rgba(5, 11, 22, 0.92) 0%, rgba(7, 18, 36, 0.85) 55%, rgba(5, 11, 22, 0.95) 100%);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(46, 199, 255, 0.14) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(39, 224, 165, 0.06) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.25rem);
            font-weight: 800;
            line-height: 1.18;
            color: var(--color-text-hero);
            margin: 0 0 16px;
            letter-spacing: 0.01em;
        }
        .category-hero h1 .highlight {
            background: linear-gradient(135deg, #2EC7FF 0%, #7DDBFF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .category-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--color-text-body);
            max-width: 720px;
            margin: 0 0 24px;
            line-height: 1.8;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding: 16px 22px;
            border-radius: 16px;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.18);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            min-width: 120px;
        }
        .hero-stat .stat-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .hero-stat .stat-label {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            letter-spacing: 0.03em;
        }

        /* Filter toolbar */
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            margin: 28px 0 36px;
            padding: 16px;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.16);
            border-radius: 16px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }
        .filter-group {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .filter-btn {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 500;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.2);
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
            min-height: 36px;
        }
        .filter-btn:hover {
            border-color: rgba(46, 199, 255, 0.5);
            color: #ffffff;
            background: rgba(46, 199, 255, 0.06);
        }
        .filter-btn.active {
            background: var(--color-primary);
            color: #04101E;
            border-color: var(--color-primary);
            font-weight: 700;
        }
        .sort-select {
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.8rem;
            background: rgba(11, 26, 46, 0.7);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-secondary);
            font-weight: 500;
            cursor: pointer;
            min-height: 36px;
            transition: border-color var(--transition-fast);
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237DDBFF' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }
        .sort-select:hover,
        .sort-select:focus {
            border-color: var(--color-primary);
            outline: none;
        }
        .result-count {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-left: auto;
            white-space: nowrap;
        }

        /* News cards grid */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }
        .news-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
        }
        .news-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
            z-index: 1;
        }
        .news-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-4px);
        }
        .news-card .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .news-card .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .news-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin: 0 0 10px;
            line-height: 1.45;
            letter-spacing: 0.01em;
        }
        .news-card .card-summary {
            font-size: 0.88rem;
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0 0 16px;
            flex: 1;
        }
        .news-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid rgba(46, 199, 255, 0.12);
        }
        .news-card .card-date {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .read-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--color-primary);
            transition: gap var(--transition-fast), color var(--transition-fast);
        }
        .news-card .read-link:hover {
            color: #5ad4ff;
            gap: 10px;
        }

        /* Pagination */
        .pagination {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin: 32px 0 48px;
        }
        .pagination .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 44px;
            height: 44px;
            padding: 0 14px;
            border-radius: 12px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.2);
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }
        .pagination .page-btn:hover {
            border-color: rgba(46, 199, 255, 0.5);
            color: #ffffff;
            background: rgba(46, 199, 255, 0.06);
        }
        .pagination .page-btn.active {
            background: var(--color-primary);
            color: #04101E;
            border-color: var(--color-primary);
            font-weight: 700;
            box-shadow: var(--shadow-glow);
        }
        .pagination .page-btn.pager {
            gap: 6px;
        }
        .pagination .page-dots {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 36px;
            height: 44px;
            color: var(--color-text-muted);
            font-weight: 600;
        }

        /* Brand intro */
        .brand-intro-section {
            padding: 48px 0 28px;
        }
        .brand-intro-card {
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            background: var(--bg-card-deep);
            border: 1px solid rgba(46, 199, 255, 0.16);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            position: relative;
            overflow: hidden;
        }
        .brand-intro-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .brand-intro-card h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin: 0;
            letter-spacing: 0.01em;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .brand-intro-card h2 i {
            color: var(--color-primary);
            font-size: 1.2rem;
        }
        .brand-intro-card p {
            font-size: 0.95rem;
            color: var(--color-text-body);
            line-height: 1.85;
            margin: 0;
        }

        /* FAQ */
        .faq-section {
            padding: 28px 0 48px;
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 28px;
        }
        .faq-section .section-header h2 {
            font-size: clamp(1.4rem, 2.5vw, 1.8rem);
            font-weight: 700;
            color: var(--color-text-heading);
            margin: 0 0 8px;
        }
        .faq-section .section-header p {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            margin: 0;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast);
            overflow: hidden;
            position: relative;
        }
        .faq-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }
        .faq-item:hover {
            border-color: rgba(46, 199, 255, 0.4);
        }
        .faq-item.open {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.72);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            color: var(--color-text-heading);
            font-weight: 600;
            font-size: 0.92rem;
            transition: color var(--transition-fast);
            min-height: 44px;
        }
        .faq-question:hover {
            color: #ffffff;
        }
        .faq-question .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            font-size: 0.7rem;
            flex-shrink: 0;
            transition: transform 0.3s ease, background var(--transition-fast), border-color var(--transition-fast);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: rgba(46, 199, 255, 0.12);
            border-color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), padding 0.25s ease;
            padding: 0 22px;
            color: rgba(214, 244, 255, 0.72);
            font-size: 0.85rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* CTA */
        .cta-section {
            padding: 48px 0 64px;
        }
        .cta-banner {
            position: relative;
            border-radius: 28px;
            padding: 52px 48px;
            background: rgba(11, 26, 46, 0.55);
            border: 1px solid rgba(46, 199, 255, 0.28);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            text-align: center;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -30%;
            left: 50%;
            transform: translateX(-50%);
            width: 700px;
            height: 400px;
            background: radial-gradient(ellipse, rgba(46, 199, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            color: var(--color-text-hero);
            margin: 0 0 12px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 0.95rem;
            color: var(--color-text-body);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.75;
            position: relative;
            z-index: 1;
        }
        .cta-banner .cta-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 14px;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.14);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .footer-brand .logo-link {
            font-size: 1.05rem;
        }
        .footer-brand p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin: 12px 0 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            padding-top: 24px;
            border-top: 1px solid rgba(46, 199, 255, 0.1);
            font-size: 0.72rem;
            color: rgba(214, 244, 255, 0.4);
        }
        .footer-bottom .sep {
            color: rgba(46, 199, 255, 0.3);
        }
        .footer-bottom a {
            color: rgba(214, 244, 255, 0.5);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Responsive header */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
        }
        @media (max-width: 640px) {
            .site-header .container {
                min-height: 58px;
            }
            .category-hero {
                padding: 56px 0 36px;
            }
            .hero-stats {
                gap: 10px;
            }
            .hero-stat {
                padding: 12px 16px;
                min-width: calc(50% - 5px);
            }
            .news-grid {
                gap: 16px;
            }
            .brand-intro-card {
                padding: 24px 20px;
            }
            .cta-banner {
                padding: 36px 20px;
                border-radius: 20px;
            }
            .faq-question {
                padding: 16px 16px;
                font-size: 0.85rem;
            }
            .faq-answer {
                font-size: 0.8rem;
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            .filter-toolbar {
                padding: 12px;
                gap: 10px;
            }
            .result-count {
                width: 100%;
                margin-left: 0;
            }
            .pagination .page-btn {
                min-width: 38px;
                height: 38px;
                padding: 0 8px;
                font-size: 0.78rem;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }

        /* Glass card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }

        /* Primary button */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }

        /* Secondary button */
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            padding: 0;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            height: 64px;
            gap: 28px;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            white-space: nowrap;
        }
        .logo-link:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.35);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 0.9rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-links a {
            color: var(--color-text-body);
            font-size: 0.88rem;
            font-weight: 500;
            padding: 6px 12px;
            border-radius: 8px;
            transition: background var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-links a:hover {
            background: rgba(46, 199, 255, 0.1);
            color: var(--color-secondary);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.08);
            position: relative;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 12px;
            right: 12px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px 3px 0 0;
            box-shadow: 0 0 10px rgba(46, 199, 255, 0.6);
        }
        .nav-cta {
            margin-left: auto;
            font-size: 0.85rem;
            padding: 9px 20px;
            min-height: 40px;
        }
        .hamburger-btn {
            display: none;
            background: none;
            border: 1px solid rgba(46, 199, 255, 0.35);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--color-secondary);
            font-size: 1.2rem;
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }
        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.1);
            border-color: var(--color-border-hover);
        }

        /* Mobile drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 100%;
            max-width: 380px;
            min-height: 100vh;
            background: #050B16;
            z-index: 100;
            transition: right var(--transition-base);
            padding: 20px 24px 32px;
            overflow-y: auto;
            border-left: 1px solid rgba(46, 199, 255, 0.22);
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }
        .mobile-drawer .drawer-close {
            background: none;
            border: 1px solid rgba(46, 199, 255, 0.35);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-secondary);
            font-size: 1.1rem;
        }
        .mobile-drawer .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .mobile-drawer .drawer-nav a {
            color: var(--color-text-body);
            font-size: 1rem;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .mobile-drawer .drawer-nav a span.num {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            font-weight: 400;
            min-width: 24px;
        }
        .mobile-drawer .drawer-nav a:hover {
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .mobile-drawer .drawer-nav a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.1);
        }
        .mobile-drawer .drawer-cta {
            margin-top: 20px;
            width: 100%;
        }

        /* Footer */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.15);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 14px;
            max-width: 340px;
            line-height: 1.8;
        }
        .footer-col h4 {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--color-text-muted);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            align-items: center;
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }
        .footer-bottom .sep {
            color: rgba(46, 199, 255, 0.3);
            margin: 0 4px;
        }
        .footer-bottom a {
            color: var(--color-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        /* Breadcrumb */
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            color: var(--color-text-muted);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--color-text-muted);
        }
        .breadcrumb-nav a:hover {
            color: var(--color-primary);
        }
        .breadcrumb-nav .sep {
            color: rgba(46, 199, 255, 0.35);
        }
        .breadcrumb-nav .current {
            color: var(--color-primary);
        }

        /* Category header / Hero */
        .category-hero {
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 11, 22, 0.92) 0%, rgba(7, 18, 36, 0.78) 55%, rgba(5, 11, 22, 0.95) 100%);
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-title {
            font-size: clamp(1.8rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            color: var(--color-text-hero);
            margin: 10px 0 16px;
        }
        .category-title span.highlight {
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-desc {
            font-size: 1.05rem;
            color: var(--color-text-body);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .hero-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 20px;
        }
        .hero-stat-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: 14px;
            padding: 14px 22px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-stat-item .stat-num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .hero-stat-item .stat-label {
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }

        /* Toolbar */
        .toolbar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin: 28px 0;
        }
        .toolbar-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-right: 4px;
        }
        .toolbar-btn {
            background: rgba(11, 26, 46, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.2);
            border-radius: 999px;
            color: var(--color-text-body);
            font-size: 0.8rem;
            font-weight: 500;
            padding: 8px 18px;
            transition: all var(--transition-fast);
            min-height: 36px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .toolbar-btn:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .toolbar-btn.active {
            background: rgba(46, 199, 255, 0.15);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* Benefit cards grid */
        .benefit-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card);
            margin: 32px 0;
        }
        .benefit-card {
            padding: 0;
            display: flex;
            flex-direction: column;
        }
        .benefit-card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-glass) var(--radius-glass) 0 0;
        }
        .benefit-card .card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .benefit-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.1);
            border-radius: 999px;
            padding: 4px 12px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .benefit-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .benefit-card p {
            font-size: 0.88rem;
            color: var(--color-text-body);
            line-height: 1.75;
            flex: 1;
        }
        .benefit-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid rgba(46, 199, 255, 0.12);
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }

        /* Tier section */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card);
            margin: 32px 0;
        }
        .tier-card {
            padding: 28px 26px;
            display: flex;
            flex-direction: column;
            text-align: left;
        }
        .tier-card.recommended {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-glow), var(--shadow-glass);
        }
        .tier-card .tier-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.72rem;
            font-weight: 700;
            color: #04101E;
            background: linear-gradient(135deg, #2EC7FF, #1A9DDE);
            border-radius: 999px;
            padding: 4px 14px;
            align-self: flex-start;
            margin-bottom: 14px;
        }
        .tier-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 4px;
        }
        .tier-card .tier-desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }
        .tier-card ul {
            list-style: none;
            margin: 0 0 18px;
            padding: 0;
            flex: 1;
        }
        .tier-card ul li {
            font-size: 0.85rem;
            color: var(--color-text-body);
            padding-left: 22px;
            position: relative;
            margin-bottom: 8px;
            line-height: 1.6;
        }
        .tier-card ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            font-size: 0.72rem;
            color: var(--color-success);
        }

        /* Scenario section */
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 32px 0;
        }
        .scenario-card {
            padding: 28px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .scenario-card .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 6px;
        }
        .scenario-card p {
            font-size: 0.85rem;
            color: var(--color-text-body);
            line-height: 1.7;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 32px 0;
        }
        .step-card {
            padding: 26px 22px;
            text-align: left;
        }
        .step-card .step-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(46, 199, 255, 0.15);
            line-height: 1;
            margin-bottom: 12px;
        }
        .step-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            line-height: 1.65;
        }

        /* FAQ */
        .faq-wrap {
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 32px;
            margin: 32px 0;
            align-items: start;
        }
        .faq-left h2 {
            font-size: clamp(1.4rem, 2.5vw, 2rem);
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 12px;
        }
        .faq-left p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.75;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border-radius: 16px;
            overflow: hidden;
        }
        .faq-item .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            color: var(--color-text-heading);
            font-weight: 600;
            font-size: 0.92rem;
            transition: background var(--transition-fast);
        }
        .faq-item .faq-question:hover {
            background: rgba(46, 199, 255, 0.05);
        }
        .faq-item .faq-question .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: var(--color-primary);
            transition: transform var(--transition-base);
        }
        .faq-item.open .faq-question .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-item .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.85rem;
            color: rgba(214, 244, 255, 0.72);
            line-height: 1.75;
        }

        /* CTA banner */
        .cta-banner {
            margin: 48px 0 56px;
            padding: 56px 48px;
            border-radius: var(--radius-glass);
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            text-align: center;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 11, 22, 0.88) 0%, rgba(7, 18, 36, 0.72) 50%, rgba(5, 11, 22, 0.9) 100%);
        }
        .cta-banner .container {
            position: relative;
            z-index: 1;
        }
        .cta-banner h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--color-text-hero);
            margin-bottom: 14px;
        }
        .cta-banner p {
            font-size: 1rem;
            color: var(--color-text-body);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-banner .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
            margin: 36px 0 48px;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: 10px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(46, 199, 255, 0.2);
            background: rgba(11, 26, 46, 0.5);
            color: var(--color-text-body);
            transition: all var(--transition-fast);
        }
        .pagination a:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .pagination .current {
            background: rgba(46, 199, 255, 0.15);
            border-color: var(--color-primary);
            color: var(--color-primary);
            font-weight: 700;
            box-shadow: 0 0 14px rgba(46, 199, 255, 0.25);
        }

        /* Section title */
        .section-head {
            margin-bottom: 28px;
        }
        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: 0.92rem;
            color: var(--color-text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
                margin-left: auto;
            }
            .benefit-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .tier-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .faq-wrap {
                grid-template-columns: 1fr;
            }
            :root {
                --section-spacing: 56px;
            }
        }
        @media (max-width: 640px) {
            .benefit-grid {
                grid-template-columns: 1fr;
            }
            .tier-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cta-banner {
                padding: 36px 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-stats {
                gap: 10px;
            }
            .hero-stat-item {
                padding: 10px 16px;
                min-width: calc(50% - 10px);
            }
            .category-hero {
                min-height: 360px;
                padding: 36px 0 44px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .pagination a,
            .pagination span {
                min-width: 34px;
                height: 34px;
                padding: 0 8px;
                font-size: 0.78rem;
            }
        }
        @media (min-width: 641px) and (max-width: 1024px) {
            .benefit-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .tier-grid {
                gap: 20px;
            }
        }
        @media (min-width: 1025px) {
            .benefit-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }
        @media (max-width: 640px) {
            :root {
                --section-spacing: 56px;
                --gap-card: 16px;
            }
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }
        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            padding: 0;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            min-height: 64px;
            gap: 20px;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text-hero);
            white-space: nowrap;
        }
        .logo-link:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #2EC7FF, #1A9DDE);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #04101E;
            font-size: 1rem;
            box-shadow: 0 0 14px rgba(46, 199, 255, 0.4);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 22px;
            margin-left: 24px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-links::-webkit-scrollbar {
            display: none;
        }
        .nav-links a {
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-text-muted);
            padding: 20px 0;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .nav-links a:hover {
            color: var(--color-secondary);
        }
        .nav-links a.active {
            color: var(--color-primary);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--color-primary);
            border-radius: 999px 999px 0 0;
            box-shadow: 0 0 10px rgba(46, 199, 255, 0.5);
        }
        .nav-cta {
            margin-left: auto;
        }
        .hamburger-btn {
            display: none;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.3);
            border-radius: 10px;
            color: var(--color-secondary);
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }
        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.2);
            border-color: rgba(46, 199, 255, 0.5);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            max-width: 360px;
            height: 100%;
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            z-index: 200;
            padding: 24px;
            flex-direction: column;
            overflow-y: auto;
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
            border-left: 1px solid rgba(46, 199, 255, 0.18);
            transform: translateX(100%);
            transition: transform 250ms ease;
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }
        .mobile-close-btn {
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.3);
            border-radius: 10px;
            color: var(--color-secondary);
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }
        .mobile-menu nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: 12px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-body);
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .mobile-menu nav a:hover {
            background: rgba(46, 199, 255, 0.08);
            color: var(--color-secondary);
        }
        .mobile-menu nav a.active {
            background: rgba(46, 199, 255, 0.12);
            color: var(--color-primary);
        }
        .mobile-menu nav a .num {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            min-width: 24px;
        }
        .mobile-menu-cta {
            margin-top: auto;
            padding-top: 16px;
        }
        /* Glass card */
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }
        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            color: #fff;
        }
        /* Section */
        .section-space {
            padding-top: var(--section-spacing);
            padding-bottom: var(--section-spacing);
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 640px;
            line-height: 1.8;
        }
        /* Badge */
        .badge-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .sep {
            opacity: 0.5;
        }
        .breadcrumb .current {
            color: var(--color-primary);
        }
        /* Toolbar */
        .toolbar-chip {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(11, 26, 46, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.2);
            color: var(--color-text-muted);
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }
        .toolbar-chip:hover {
            border-color: rgba(46, 199, 255, 0.4);
            color: var(--color-secondary);
        }
        .toolbar-chip.active {
            background: rgba(46, 199, 255, 0.15);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        /* Content card image */
        .card-cover {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: 12px;
        }
        /* FAQ */
        .faq-item {
            border: 1px solid rgba(46, 199, 255, 0.18);
            border-radius: 16px;
            background: rgba(11, 26, 46, 0.45);
            transition: border-color var(--transition-fast), background var(--transition-fast);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(46, 199, 255, 0.35);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text-heading);
            transition: color var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question .fa-chevron-down {
            font-size: 0.85rem;
            transition: transform var(--transition-base);
            flex-shrink: 0;
            color: var(--color-text-muted);
        }
        .faq-item.open .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
            color: rgba(214, 244, 255, 0.72);
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .faq-answer-inner {
            padding: 0 20px 18px;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-item.open {
            border-color: rgba(46, 199, 255, 0.45);
            background: rgba(11, 26, 46, 0.6);
        }
        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 14px;
            border-radius: 12px;
            border: 1px solid rgba(46, 199, 255, 0.25);
            background: rgba(11, 26, 46, 0.5);
            color: var(--color-text-muted);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .page-btn:hover {
            border-color: rgba(46, 199, 255, 0.5);
            color: var(--color-secondary);
        }
        .page-btn.active {
            background: rgba(46, 199, 255, 0.15);
            border-color: var(--color-primary);
            color: var(--color-primary);
            box-shadow: 0 0 12px rgba(46, 199, 255, 0.3);
        }
        /* Footer */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.12);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-top: 12px;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }
        .footer-bottom .sep {
            opacity: 0.4;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 14px;
                margin-left: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .site-header .nav-cta {
                display: none;
            }
            .hamburger-btn {
                display: flex;
                margin-left: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .site-header .container {
                min-height: 56px;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 10px 20px;
                font-size: 0.85rem;
                min-height: 44px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        /* Custom add-ons for this page */
        .hero-backdrop {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            isolation: isolate;
        }
        .hero-backdrop::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 11, 22, 0.92) 0%, rgba(7, 18, 36, 0.78) 50%, rgba(5, 11, 22, 0.95) 100%);
            z-index: -1;
        }
        .accent-glow {
            box-shadow: 0 0 24px rgba(46, 199, 255, 0.18);
        }
        .stat-number {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--color-text-hero);
            line-height: 1.2;
        }
        .stat-unit {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            font-weight: 400;
        }
        .divide-line {
            height: 1px;
            background: rgba(46, 199, 255, 0.12);
            width: 100%;
        }

/* roulang page: category7 */
:root {
            --bg-primary: #050B16;
            --bg-secondary: #071224;
            --bg-card: rgba(11, 26, 46, 0.55);
            --bg-card-deep: rgba(9, 18, 36, 0.62);
            --color-primary: #2EC7FF;
            --color-primary-dark: #1A9DDE;
            --color-secondary: #D6F4FF;
            --color-text-body: rgba(222, 238, 250, 0.78);
            --color-text-muted: rgba(214, 244, 255, 0.56);
            --color-text-heading: #EAF6FF;
            --color-text-hero: #F4F9FF;
            --color-border: rgba(46, 199, 255, 0.22);
            --color-border-hover: rgba(46, 199, 255, 0.55);
            --color-success: #27E0A5;
            --color-warning: #FFB84D;
            --radius-glass: 22px;
            --radius-btn: 999px;
            --radius-input: 14px;
            --shadow-glass: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.06);
            --shadow-glass-hover: 0 26px 56px rgba(0, 0, 0, 0.48), inset 0 1px 0 rgba(255, 255, 255, 0.08);
            --shadow-glow: 0 0 18px rgba(46, 199, 255, 0.35);
            --shadow-glow-hover: 0 0 28px rgba(46, 199, 255, 0.55);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --container-max: 1200px;
            --gap-card: 24px;
            --section-spacing: 96px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-sans);
            background: linear-gradient(180deg, #050B16 0%, #071224 100%);
            color: var(--color-text-body);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: #5ad4ff;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
            width: 100%;
        }
        .glass-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .glass-card:hover {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #2EC7FF 0%, #1A9DDE 100%);
            color: #04101E;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: filter var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-primary:hover {
            filter: brightness(1.12);
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-1px);
            color: #04101E;
        }
        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.95);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(46, 199, 255, 0.45);
            color: var(--color-secondary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
            min-height: 46px;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            border-color: var(--color-border-hover);
            background: rgba(46, 199, 255, 0.08);
            transform: translateY(-1px);
            color: var(--color-secondary);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.08);
            border: 1px solid rgba(46, 199, 255, 0.22);
            border-radius: 999px;
            padding: 5px 14px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }
        .tag-success {
            color: var(--color-success);
            background: rgba(39, 224, 165, 0.08);
            border-color: rgba(39, 224, 165, 0.25);
        }
        .tag-warning {
            color: var(--color-warning);
            background: rgba(255, 184, 77, 0.08);
            border-color: rgba(255, 184, 77, 0.25);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 28px;
            height: 28px;
            border-radius: 6px;
            font-size: 0.8rem;
            font-weight: 700;
            color: #04101E;
            background: var(--color-primary);
            padding: 0 8px;
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2.4rem);
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.25;
            letter-spacing: -0.01em;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--color-text-muted);
            line-height: 1.75;
            max-width: 620px;
        }
        .card-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--color-text-heading);
            line-height: 1.4;
        }
        .card-desc {
            font-size: 0.925rem;
            color: var(--color-text-body);
            line-height: 1.7;
        }
        .muted-text {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(46, 199, 255, 0.25), transparent);
            border: none;
            margin: 0;
        }
        .image-cover {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: inherit;
            position: relative;
            z-index: 1;
        }
        .image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(5, 11, 22, 0.15) 0%, rgba(5, 11, 22, 0.72) 100%);
            z-index: 2;
            pointer-events: none;
            border-radius: inherit;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
            padding: 0;
            list-style: none;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: rgba(214, 244, 255, 0.3);
            font-size: 0.75rem;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(5, 11, 22, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(46, 199, 255, 0.18);
            padding: 14px 0;
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: nowrap;
        }
        .logo-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--color-text-hero);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .logo-link:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.12);
            border: 1px solid rgba(46, 199, 255, 0.3);
            color: var(--color-primary);
            font-size: 1rem;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
            margin-left: 12px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-text-muted);
            padding: 8px 14px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background var(--transition-fast);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--color-secondary);
            background: rgba(46, 199, 255, 0.07);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(46, 199, 255, 0.1);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(46, 199, 255, 0.5);
        }
        .nav-cta {
            margin-left: auto;
            flex-shrink: 0;
        }
        .hamburger-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.08);
            border: 1px solid rgba(46, 199, 255, 0.22);
            color: var(--color-secondary);
            font-size: 1.2rem;
            transition: background var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }
        .hamburger-btn:hover {
            background: rgba(46, 199, 255, 0.15);
            border-color: rgba(46, 199, 255, 0.4);
        }
        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            inset: 0;
            z-index: 200;
            background: linear-gradient(180deg, #050B16 0%, #0B1A2E 100%);
            transform: translateX(-100%);
            transition: transform 280ms ease;
            display: flex;
            flex-direction: column;
            padding: 20px 24px 32px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .drawer-close {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.08);
            border: 1px solid rgba(46, 199, 255, 0.22);
            color: var(--color-secondary);
            font-size: 1.1rem;
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 12px;
        }
        .drawer-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-body);
            border: 1px solid transparent;
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }
        .drawer-nav a:hover,
        .drawer-nav a.active {
            background: rgba(46, 199, 255, 0.08);
            border-color: rgba(46, 199, 255, 0.2);
            color: var(--color-primary);
        }
        .drawer-cta {
            margin-top: auto;
            padding-top: 24px;
        }
        .drawer-cta .btn-primary {
            width: 100%;
        }
        /* Hero */
        .category-hero {
            position: relative;
            padding: clamp(56px, 7vw, 88px) 0 clamp(48px, 5vw, 64px);
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(5, 11, 22, 0.92) 0%, rgba(7, 18, 36, 0.78) 45%, rgba(5, 11, 22, 0.95) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: clamp(2rem, 4.5vw, 3.25rem);
            font-weight: 800;
            line-height: 1.18;
            color: var(--color-text-hero);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .hero-content h1 span {
            background: linear-gradient(135deg, #2EC7FF 0%, #7AE0FF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-lead {
            font-size: 1.05rem;
            color: rgba(214, 244, 255, 0.72);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-panel {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            padding: 28px 24px;
            position: relative;
        }
        .hero-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .stat-item {
            text-align: center;
            padding: 14px 10px;
            border-radius: 14px;
            background: rgba(7, 18, 36, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.12);
        }
        .stat-value {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-top: 4px;
        }
        /* Toolbar */
        .toolbar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            padding: 14px 0;
            margin-bottom: 20px;
        }
        .toolbar-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-muted);
            background: rgba(7, 18, 36, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.18);
            transition: all var(--transition-fast);
            white-space: nowrap;
            min-height: 38px;
        }
        .toolbar-btn:hover {
            color: var(--color-secondary);
            border-color: rgba(46, 199, 255, 0.4);
            background: rgba(46, 199, 255, 0.07);
        }
        .toolbar-btn.active {
            color: #04101E;
            background: var(--color-primary);
            border-color: var(--color-primary);
            font-weight: 600;
        }
        .sort-select {
            margin-left: auto;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 0.85rem;
            color: var(--color-secondary);
            background: rgba(7, 18, 36, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.18);
            appearance: none;
            cursor: pointer;
            min-height: 38px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%232EC7FF' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }
        /* Content cards */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card);
        }
        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            border-color: var(--color-border-hover);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }
        .card-cover-wrap {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            border-radius: var(--radius-glass) var(--radius-glass) 0 0;
            flex-shrink: 0;
        }
        .card-cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 300ms ease;
        }
        .content-card:hover .card-cover-wrap img {
            transform: scale(1.03);
        }
        .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.75rem;
            color: var(--color-text-muted);
        }
        .card-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-body);
            line-height: 1.65;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-primary);
            margin-top: auto;
            padding-top: 6px;
        }
        .card-link:hover {
            color: #5ad4ff;
        }
        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 42px;
            height: 42px;
            padding: 0 12px;
            border-radius: 10px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--color-text-muted);
            background: rgba(7, 18, 36, 0.6);
            border: 1px solid rgba(46, 199, 255, 0.18);
            transition: all var(--transition-fast);
        }
        .page-btn:hover {
            color: var(--color-secondary);
            border-color: rgba(46, 199, 255, 0.4);
        }
        .page-btn.active {
            color: #04101E;
            background: var(--color-primary);
            border-color: var(--color-primary);
            font-weight: 700;
            box-shadow: var(--shadow-glow);
        }
        .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }
        /* Feature cards asymmetric */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-glass);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            padding: 20px 18px;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            border-color: var(--color-border-hover);
            box-shadow: var(--shadow-glass-hover);
            transform: translateY(-3px);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
        }
        .feature-num {
            font-size: 1.6rem;
            font-weight: 800;
            color: rgba(46, 199, 255, 0.18);
            line-height: 1;
            margin-bottom: 10px;
            display: block;
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(46, 199, 255, 0.1);
            border: 1px solid rgba(46, 199, 255, 0.25);
            color: var(--color-primary);
            font-size: 1rem;
            margin-bottom: 12px;
        }
        .feature-card h3 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 6px;
        }
        .feature-card p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        /* Scenario */
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: start;
        }
        .scenario-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .scenario-item {
            display: flex;
            gap: 14px;
            padding: 16px 18px;
            border-radius: 14px;
            background: rgba(7, 18, 36, 0.5);
            border: 1px solid rgba(46, 199, 255, 0.12);
            transition: all var(--transition-fast);
        }
        .scenario-item:hover {
            border-color: rgba(46, 199, 255, 0.35);
            background: rgba(11, 26, 46, 0.6);
        }
        .scenario-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.12);
            color: var(--color-primary);
            font-size: 0.78rem;
            font-weight: 700;
        }
        .scenario-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 4px;
        }
        .scenario-item p {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            line-height: 1.6;
        }
        .scenario-visual {
            border-radius: var(--radius-glass);
            overflow: hidden;
            border: 1px solid var(--color-border);
            position: relative;
            aspect-ratio: 4/3;
            box-shadow: var(--shadow-glass);
        }
        .scenario-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        /* FAQ */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 32px;
            align-items: start;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover,
        .faq-item.active {
            border-color: var(--color-border-hover);
            background: rgba(11, 26, 46, 0.68);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 16px 20px;
            cursor: pointer;
            border: none;
            background: transparent;
            color: var(--color-text-heading);
            font-weight: 600;
            font-size: 0.92rem;
            text-align: left;
            width: 100%;
            min-height: 48px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-secondary);
        }
        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: rgba(46, 199, 255, 0.1);
            color: var(--color-primary);
            font-size: 0.8rem;
            transition: transform var(--transition-fast);
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: var(--color-primary);
            color: #04101E;
        }
        .faq-answer {
            display: none;
            padding: 0 20px 18px;
            font-size: 0.88rem;
            color: rgba(214, 244, 255, 0.72);
            line-height: 1.75;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        /* CTA */
        .cta-banner {
            border-radius: var(--radius-glass);
            border: 1px solid var(--color-border);
            padding: clamp(36px, 5vw, 56px);
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 11, 22, 0.9) 0%, rgba(11, 26, 46, 0.75) 50%, rgba(5, 11, 22, 0.92) 100%);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            border-radius: var(--radius-glass);
        }
        .cta-banner .container {
            position: relative;
            z-index: 2;
        }
        .cta-banner h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--color-text-hero);
            margin-bottom: 12px;
        }
        .cta-banner p {
            font-size: 0.95rem;
            color: rgba(214, 244, 255, 0.68);
            max-width: 500px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        /* Footer */
        .site-footer {
            background: #030A14;
            border-top: 1px solid rgba(46, 199, 255, 0.12);
            padding: 56px 0 32px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-top: 14px;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.06em;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(46, 199, 255, 0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 0.78rem;
            color: rgba(214, 244, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(214, 244, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        .sep {
            color: rgba(214, 244, 255, 0.2);
            margin: 0 4px;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-panel {
                max-width: 480px;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .content-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .nav-links {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
            }
            .nav-cta {
                display: none;
            }
        }
        @media (max-width: 640px) {
            :root {
                --section-spacing: 56px;
                --gap-card: 16px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-content h1 {
                font-size: 1.75rem;
            }
            .hero-lead {
                font-size: 0.92rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
            }
            .stat-value {
                font-size: 1.35rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .content-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .toolbar {
                gap: 6px;
            }
            .toolbar-btn {
                padding: 6px 12px;
                font-size: 0.78rem;
                min-height: 34px;
            }
            .sort-select {
                margin-left: 0;
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .cta-banner {
                padding: 28px 18px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .card-body {
                padding: 14px 16px 16px;
            }
            .scenario-item {
                flex-direction: column;
                gap: 8px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.85rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.82rem;
            }
        }
        @media (min-width: 641px) and (max-width: 1024px) {
            .content-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1025px) {
            .content-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }