/* roulang page: index */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1B2E;
            --bg-tertiary: #12233A;
            --accent: #22D3EE;
            --accent-glow: rgba(34, 211, 238, 0.35);
            --accent-dim: rgba(34, 211, 238, 0.12);
            --text-primary: #F4F7FB;
            --text-secondary: #C7D2E0;
            --text-muted: #8A96A8;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-glass: rgba(255, 255, 255, 0.18);
            --card-glass-bg: rgba(255, 255, 255, 0.06);
            --card-glass-bg-strong: rgba(255, 255, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-deep: 0 20px 40px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.3, 0.1, 0.2, 1);
            --section-pad: 72px 0;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

        button, input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        .container {
            width: min(1180px, 92%);
            margin: 0 auto;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #22D3EE 0%, #1E40AF 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            box-shadow: 0 0 16px rgba(34,211,238,0.35);
        }

        .brand-name {
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.5px;
            background: linear-gradient(90deg, #ffffff 0%, #d4f4ff 60%, #22D3EE 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
        }

        .nav-link.active {
            color: var(--accent);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--accent-glow);
        }

        .mega-trigger {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }

        .mega-trigger:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(34, 211, 238, 0.06);
        }

        .mega-trigger .arrow {
            font-size: 10px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            transition: all var(--transition);
            border-radius: 2px;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mega Panel */
        .mega-panel {
            position: absolute;
            top: 100%;
            right: 0;
            width: min(720px, 90vw);
            background: rgba(15, 27, 46, 0.95);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-deep), 0 0 32px rgba(34, 211, 238, 0.08);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-12px);
            transition: all 0.3s ease;
            display: grid;
            grid-template-columns: 1fr 1.2fr 0.8fr;
            gap: 20px;
        }

        .mega-trigger-wrap {
            position: relative;
        }

        .mega-trigger-wrap:hover .mega-panel,
        .mega-trigger-wrap:focus-within .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .mega-col-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        .mega-hot-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mega-hot-list li a {
            display: block;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 14px;
            transition: all var(--transition);
        }

        .mega-hot-list li a:hover {
            background: rgba(34, 211, 238, 0.08);
            color: var(--accent);
        }

        .mega-card-mini {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 14px;
            transition: all var(--transition);
        }

        .mega-card-mini:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-glow);
        }

        .mega-card-mini img {
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .mega-card-mini .mcm-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .mega-card-mini .mcm-time {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .mega-entry-card {
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.12) 0%, rgba(30, 64, 175, 0.15) 100%);
            border: 1px solid rgba(34, 211, 238, 0.3);
            border-radius: var(--radius-md);
            padding: 16px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
        }

        .mega-entry-card .mec-icon {
            font-size: 28px;
            margin-bottom: 8px;
        }

        .mega-entry-card .mec-title {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .mega-entry-card .mec-sub {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        /* Mobile nav */
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 14, 26, 0.96);
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
            position: absolute;
            top: 68px;
            left: 0;
            right: 0;
            z-index: 999;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link {
            padding: 14px 20px;
            border-radius: 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 16px;
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            padding: 48px 0 56px;
            background: var(--bg-primary);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/3a1a5e713bb6f7fb.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.45;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,14,26,0.55) 0%, rgba(10,14,26,0.92) 88%, #0A0E1A 100%);
        }

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

        .hero-flash-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            background: rgba(34, 211, 238, 0.10);
            border: 1px solid rgba(34, 211, 238, 0.28);
            border-radius: var(--radius-md);
            padding: 12px 20px;
            margin-bottom: 36px;
        }

        .flash-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .countdown-box {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
        }

        .countdown-box .cd-item {
            background: rgba(255,255,255,0.08);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            padding: 4px 10px;
            min-width: 40px;
            text-align: center;
            font-variant-numeric: tabular-nums;
        }

        .countdown-box .cd-sep {
            color: var(--accent);
            font-weight: 700;
        }

        .hero-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .hero-text h1 {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 18px;
            background: linear-gradient(90deg, #ffffff 0%, #e8faff 40%, #22D3EE 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 26px;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, #22D3EE 0%, #2563EB 100%);
            color: #fff;
            box-shadow: 0 4px 20px rgba(34, 211, 238, 0.28);
        }

        .btn-primary:hover {
            box-shadow: 0 0 24px rgba(34, 211, 238, 0.5), 0 6px 24px rgba(34, 211, 238, 0.3);
            transform: translateY(-2px);
            filter: brightness(1.08);
        }

        .btn-primary:focus-visible {
            outline: 2px solid #ffffff;
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(34, 211, 238, 0.3) inset;
        }

        .btn-secondary {
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
            transform: translateY(-1px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .hero-main-card {
            background: var(--card-glass-bg-strong);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-xl);
            padding: 22px;
            box-shadow: var(--shadow-deep), 0 0 36px rgba(34, 211, 238, 0.06);
        }

        .hero-main-card img {
            border-radius: var(--radius-md);
            aspect-ratio: 16/10;
            object-fit: cover;
            margin-bottom: 14px;
        }

        .hero-card-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(34, 211, 238, 0.12);
            padding: 4px 10px;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }

        .hero-card-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .hero-card-sub {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .hero-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Section Common ===== */
        section {
            padding: var(--section-pad);
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.25);
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
        }

        /* ===== KPI Board ===== */
        .kpi-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .kpi-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition);
        }

        .kpi-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
            background: var(--card-glass-bg-strong);
            box-shadow: 0 4px 20px rgba(34, 211, 238, 0.08);
        }

        .kpi-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
            font-variant-numeric: tabular-nums;
        }

        .kpi-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== Service Matrix ===== */
        .service-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .service-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, #22D3EE, #2563EB);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .service-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.4);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            font-size: 32px;
            margin-bottom: 14px;
            display: block;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Pain Points ===== */
        .pain-section {
            background: var(--bg-primary);
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .pain-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition);
        }

        .pain-card:hover {
            border-color: rgba(34, 211, 238, 0.35);
            box-shadow: 0 4px 18px rgba(34, 211, 238, 0.06);
        }

        .pain-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.22);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
        }

        .pain-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .pain-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .steps-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            text-align: center;
            position: relative;
            padding: 0 10px;
        }

        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, #22D3EE 0%, #2563EB 100%);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Comparison ===== */
        .comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 920px;
            margin: 0 auto;
        }

        .compare-card {
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
        }

        .compare-card.bad {
            background: rgba(255, 80, 80, 0.06);
            border-color: rgba(255, 80, 80, 0.25);
        }

        .compare-card.good {
            background: rgba(34, 211, 238, 0.08);
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.08);
        }

        .compare-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .compare-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .compare-card ul li {
            font-size: 14px;
            color: var(--text-secondary);
            padding-left: 24px;
            position: relative;
        }

        .compare-card ul li::before {
            content: '✗';
            position: absolute;
            left: 0;
            top: 1px;
            font-size: 14px;
            color: #ff5555;
        }

        .compare-card.good ul li::before {
            content: '✓';
            color: var(--accent);
        }

        /* ===== Milestones ===== */
        .milestone-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }

        .timeline-item {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            transition: all var(--transition);
        }

        .timeline-item:hover {
            border-color: rgba(34, 211, 238, 0.35);
            background: var(--card-glass-bg-strong);
        }

        .timeline-date {
            font-size: 12px;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

        .timeline-item h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .timeline-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== News / CMS Section ===== */
        .news-section {
            background: var(--bg-primary);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 28px;
        }

        .news-main {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-card {
            display: flex;
            gap: 16px;
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 14px;
            transition: all var(--transition);
        }

        .news-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
            box-shadow: 0 4px 18px rgba(34, 211, 238, 0.06);
            transform: translateY(-2px);
        }

        .news-card img {
            width: 160px;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .news-card-body {
            flex: 1;
            min-width: 0;
        }

        .news-card-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-summary {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-card-meta .tag {
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
            padding: 2px 8px;
            border-radius: 12px;
        }

        .news-side {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 22px;
            align-self: start;
        }

        .news-side h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-light);
        }

        .news-side-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .news-side-list a {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .news-side-list a:hover {
            background: rgba(34, 211, 238, 0.06);
            color: var(--accent);
        }

        /* ===== Data Metrics ===== */
        .metrics-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .metrics-bars {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 760px;
        }

        .metric-bar-row {
            display: grid;
            grid-template-columns: 160px 1fr 80px;
            align-items: center;
            gap: 16px;
        }

        .metric-bar-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .metric-bar-track {
            height: 8px;
            background: rgba(255,255,255,0.08);
            border-radius: 4px;
            overflow: hidden;
        }

        .metric-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, #22D3EE, #2563EB);
            border-radius: 4px;
            transition: width 0.6s ease;
        }

        .metric-bar-value {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            text-align: right;
            font-variant-numeric: tabular-nums;
        }

        /* ===== Platform Guarantee ===== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .guarantee-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
            transition: all var(--transition);
        }

        .guarantee-card:hover {
            border-color: rgba(34, 211, 238, 0.35);
            background: var(--card-glass-bg-strong);
        }

        .guarantee-icon {
            font-size: 30px;
            margin-bottom: 12px;
            display: block;
        }

        .guarantee-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .guarantee-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Topic Cards ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .topic-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
        }

        .topic-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.4);
        }

        .topic-card img {
            aspect-ratio: 16/10;
            object-fit: cover;
            width: 100%;
        }

        .topic-card-body {
            padding: 18px;
        }

        .topic-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .topic-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .topic-card-link {
            display: inline-block;
            margin-top: 10px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
        }

        .topic-card-link:hover {
            text-shadow: 0 0 12px var(--accent-glow);
        }

        /* ===== Testimonials ===== */
        .testimonial-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .testimonial-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            border-color: rgba(34, 211, 238, 0.3);
        }

        .testimonial-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, #22D3EE, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: #fff;
        }

        .testimonial-name {
            font-size: 14px;
            font-weight: 600;
        }

        .testimonial-device {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

        .faq-item {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(34, 211, 238, 0.25);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            width: 100%;
            text-align: left;
            color: var(--text-primary);
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-arrow {
            flex-shrink: 0;
            margin-left: 12px;
            transition: transform var(--transition);
            font-size: 12px;
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-primary);
            position: relative;
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.10) 0%, rgba(30, 64, 175, 0.15) 100%);
            border: 1px solid rgba(34, 211, 238, 0.3);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/34e888809d440fea.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }

        .cta-box > * {
            position: relative;
            z-index: 1;
        }

        .cta-box h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #070A12;
            border-top: 1px solid var(--border-light);
            padding: 40px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }

        .footer-brand .brand-name {
            font-size: 16px;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

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

        .footer-col ul a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 18px;
            text-align: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
            }
            .hero-main-card {
                max-width: 500px;
            }
            .service-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px 16px;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
                max-width: 600px;
            }
            .mega-panel {
                grid-template-columns: 1fr 1fr;
                right: auto;
                left: 50%;
                transform: translateX(-50%) translateY(-12px);
            }
            .mega-trigger-wrap:hover .mega-panel,
            .mega-trigger-wrap:focus-within .mega-panel {
                transform: translateX(-50%) translateY(0);
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .brand-name {
                font-size: 15px;
            }
            .hero {
                padding: 32px 0 36px;
            }
            .hero-flash-bar {
                flex-direction: column;
                text-align: center;
                padding: 12px 16px;
            }
            .hero-text h1 {
                font-size: 26px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .pain-grid {
                grid-template-columns: 1fr;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .steps-bar {
                grid-template-columns: 1fr;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .metric-bar-row {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 8px;
            }
            .metric-bar-value {
                text-align: center;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card img {
                width: 100%;
            }
            .mega-panel {
                grid-template-columns: 1fr;
                width: min(500px, 92vw);
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
                margin-top: 8px;
            }
            .mega-trigger-wrap:hover .mega-panel,
            .mega-trigger-wrap:focus-within .mega-panel {
                display: grid;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            .container {
                width: 95%;
            }
            .brand-name {
                font-size: 13px;
                letter-spacing: 0;
            }
            .brand-mark {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .hero-text h1 {
                font-size: 22px;
            }
            .btn {
                padding: 12px 20px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .kpi-grid {
                grid-template-columns: 1fr;
            }
            .timeline {
                grid-template-columns: 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .countdown-box {
                font-size: 14px;
                flex-wrap: wrap;
                justify-content: center;
            }
            .countdown-box .cd-item {
                min-width: 32px;
                padding: 3px 8px;
                font-size: 13px;
            }
            .hero-main-card {
                padding: 16px;
            }
            .hero-card-title {
                font-size: 16px;
            }
            .section-title {
                font-size: 19px;
            }
            .section-desc {
                font-size: 14px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 13px;
            }
        }

        /* Accessibility */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        /* Reduced motion */
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1B2E;
            --bg-tertiary: #12233A;
            --accent: #22D3EE;
            --accent-glow: rgba(34, 211, 238, 0.35);
            --accent-dim: rgba(34, 211, 238, 0.12);
            --text-primary: #F4F7FB;
            --text-secondary: #C7D2E0;
            --text-muted: #8A96A8;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-glass: rgba(255, 255, 255, 0.18);
            --card-glass-bg: rgba(255, 255, 255, 0.06);
            --card-glass-bg-strong: rgba(255, 255, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-deep: 0 20px 40px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.3, 0.1, 0.2, 1);
            --section-pad: 72px 0;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul {
            list-style: none;
        }

        .container {
            width: min(1180px, 92%);
            margin: 0 auto;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
            position: relative;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #22D3EE 0%, #1E40AF 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            box-shadow: 0 0 16px rgba(34,211,238,0.35);
        }

        .brand-name {
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.5px;
            background: linear-gradient(90deg, #ffffff 0%, #d4f4ff 60%, #22D3EE 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
        }

        .nav-link.active {
            color: var(--accent);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--accent-glow);
        }

        .mega-trigger {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .mega-trigger:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(34, 211, 238, 0.06);
        }

        .mega-trigger .arrow {
            font-size: 10px;
            transition: transform var(--transition);
        }

        .mega-trigger:hover .arrow {
            transform: rotate(180deg);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            transition: all var(--transition);
            border-radius: 2px;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mega Panel */
        .mega-trigger-wrap {
            position: relative;
        }

        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            right: 0;
            width: min(720px, 90vw);
            background: rgba(15, 27, 46, 0.98);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: grid;
            grid-template-columns: 1fr 1fr 1.2fr;
            gap: 28px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-8px);
            transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
            box-shadow: var(--shadow-deep), var(--shadow-glow);
            z-index: 999;
        }

        .mega-trigger-wrap.open .mega-panel,
        .mega-trigger-wrap:focus-within .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .mega-col-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.8px;
            margin-bottom: 12px;
        }

        .mega-hot-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mega-hot-list a {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border-left: 2px solid transparent;
        }

        .mega-hot-list a:hover {
            color: var(--accent);
            background: rgba(34, 211, 238, 0.06);
            border-left-color: var(--accent);
        }

        .mega-card-mini {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 8px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: all var(--transition);
        }

        .mega-card-mini:hover {
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(34,211,238,0.2);
        }

        .mega-card-mini img {
            width: 100%;
            border-radius: var(--radius-sm);
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-tertiary);
        }

        .mcm-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .mcm-time {
            font-size: 12px;
            color: var(--text-muted);
        }

        .mega-entry-card {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 8px;
            padding: 20px;
            background: linear-gradient(135deg, rgba(34,211,238,0.15) 0%, rgba(30,64,175,0.25) 100%);
            border: 1px solid var(--accent-glow);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .mega-entry-card:hover {
            border-color: var(--accent);
            box-shadow: 0 0 20px rgba(34,211,238,0.3);
            transform: translateY(-2px);
        }

        .mec-icon {
            font-size: 28px;
        }

        .mec-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .mec-sub {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* ===== Sections ===== */
        .section {
            padding: var(--section-pad);
        }

        .section-alt {
            background: var(--bg-secondary);
        }

        .section-header {
            margin-bottom: 36px;
            max-width: 720px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-dim);
            border: 1px solid var(--accent-glow);
            border-radius: 50px;
            padding: 4px 14px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            padding: 72px 0 56px;
            background: linear-gradient(180deg, rgba(15,27,46,0.4) 0%, rgba(10,14,26,0) 100%);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(34,211,238,0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .category-hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .category-hero-content h1 .highlight {
            background: linear-gradient(90deg, #22D3EE 0%, #7DD3FC 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .category-hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .hero-search-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            flex-wrap: wrap;
        }

        .hero-search-form input {
            flex: 1;
            min-width: 220px;
            background: rgba(255,255,255,0.08);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 13px 18px;
            font-size: 15px;
            color: var(--text-primary);
            transition: all var(--transition);
        }

        .hero-search-form input::placeholder {
            color: var(--text-muted);
        }

        .hero-search-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 12px rgba(34,211,238,0.25);
            background: rgba(255,255,255,0.1);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            background: linear-gradient(135deg, #22D3EE 0%, #1E40AF 100%);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(34,211,238,0.3);
        }

        .btn-primary:hover {
            filter: brightness(1.15);
            box-shadow: 0 0 18px rgba(34,211,238,0.5);
            transform: translateY(-2px);
        }

        .btn-primary:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }

        .btn-primary:active {
            transform: translateY(0) scale(0.98);
            box-shadow: inset 0 2px 8px rgba(0,0,0,0.3);
        }

        .category-hero-visual {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .category-hero-visual img {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-glass);
            aspect-ratio: 16/10;
            object-fit: cover;
            background: var(--bg-tertiary);
            box-shadow: var(--shadow-deep);
        }

        .hero-visual-caption {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Content Cards Grid ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .content-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent-glow);
            box-shadow: 0 16px 32px rgba(0,0,0,0.4), 0 0 18px rgba(34,211,238,0.2);
        }

        .content-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-tertiary);
            border-bottom: 1px solid var(--border-light);
        }

        .card-body {
            padding: 18px 18px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }

        .card-title:hover {
            color: var(--accent);
        }

        .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .card-meta {
            display: flex;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            padding-top: 8px;
            border-top: 1px solid var(--border-light);
            flex-wrap: wrap;
        }

        .card-meta .tag {
            color: var(--accent);
            background: var(--accent-dim);
            border-radius: 4px;
            padding: 2px 8px;
            font-weight: 500;
        }

        .list-empty {
            text-align: center;
            padding: 40px;
            background: var(--card-glass-bg);
            border: 1px dashed var(--border-glass);
            border-radius: var(--radius-lg);
            color: var(--text-muted);
            font-size: 15px;
        }

        .list-more {
            margin-top: 28px;
            text-align: center;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 24px;
            background: transparent;
            border: 1px solid var(--border-glass);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(34,211,238,0.06);
            box-shadow: 0 0 12px rgba(34,211,238,0.15);
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ===== Scene Tags ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .scene-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            text-align: center;
            transition: all var(--transition);
        }

        .scene-card:hover {
            border-color: var(--accent-glow);
            background: var(--card-glass-bg-strong);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.3);
        }

        .scene-icon {
            font-size: 28px;
            margin-bottom: 10px;
        }

        .scene-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .scene-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== Timeline ===== */
        .timeline {
            position: relative;
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 18px;
            top: 8px;
            bottom: 8px;
            width: 1px;
            background: var(--border-glass);
        }

        .timeline-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            position: relative;
        }

        .timeline-dot {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--bg-tertiary);
            border: 1px solid var(--accent-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
            color: var(--accent);
            position: relative;
            z-index: 1;
        }

        .timeline-content {
            flex: 1;
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 20px;
        }

        .timeline-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .timeline-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Device Icons ===== */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .device-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: all var(--transition);
        }

        .device-card:hover {
            border-color: var(--accent-glow);
            background: var(--card-glass-bg-strong);
        }

        .device-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, rgba(34,211,238,0.2) 0%, rgba(30,64,175,0.2) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
        }

        .device-info h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }

        .device-info p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item.open {
            border-color: var(--accent-glow);
            box-shadow: 0 0 16px rgba(34,211,238,0.15);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-question .faq-icon {
            font-size: 12px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0;
            background: linear-gradient(135deg, rgba(15,27,46,0.8) 0%, rgba(18,35,58,0.9) 100%);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            top: 50%;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(34,211,238,0.12) 0%, transparent 70%);
            transform: translateY(-50%);
            pointer-events: none;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .cta-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .cta-text p {
            font-size: 15px;
            color: var(--text-secondary);
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== Link Cards ===== */
        .link-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .link-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
            transition: all var(--transition);
            display: block;
        }

        .link-card:hover {
            border-color: var(--accent-glow);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.3);
        }

        .link-card .lk-icon {
            font-size: 26px;
            margin-bottom: 8px;
        }

        .link-card .lk-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .link-card .lk-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .brand-name {
            font-size: 18px;
            font-weight: 700;
            background: linear-gradient(90deg, #ffffff 0%, #d4f4ff 60%, #22D3EE 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            display: block;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Focus Visibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container {
                width: 94%;
            }
            .section {
                padding: 56px 0;
            }
            .category-hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .content-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .device-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .link-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .mega-panel {
                grid-template-columns: 1fr 1fr;
                width: min(600px, 90vw);
            }
            .mega-entry-card {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .header-inner {
                height: 60px;
                gap: 16px;
            }
            .brand-name {
                font-size: 14px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 20px 6%;
                border-bottom: 1px solid var(--border-light);
                display: none;
                max-height: calc(100vh - 60px);
                overflow-y: auto;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                padding: 12px;
                font-size: 16px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: rgba(34, 211, 238, 0.08);
                border-radius: var(--radius-sm);
            }
            .mega-trigger {
                justify-content: space-between;
                width: 100%;
                border-radius: var(--radius-sm);
                font-size: 15px;
            }
            .mega-panel {
                position: static;
                width: 100%;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 16px;
                background: rgba(15, 27, 46, 0.98);
                box-shadow: none;
                border: 1px solid var(--border-light);
            }
            .mega-trigger-wrap.open .mega-panel {
                display: grid;
            }
            .mega-entry-card {
                grid-column: auto;
            }
            .hamburger {
                display: flex;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .category-hero {
                padding: 40px 0;
            }
            .category-hero-content h1 {
                font-size: 26px;
            }
            .category-hero-desc {
                font-size: 15px;
            }
            .hero-search-form {
                flex-direction: column;
            }
            .hero-search-form input {
                min-width: 100%;
            }
            .content-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .device-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .link-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-actions {
                width: 100%;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-outline {
                flex: 1;
            }
            .card-title {
                font-size: 15px;
            }
            .timeline::before {
                left: 14px;
            }
            .timeline-dot {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .brand-name {
                font-size: 12px;
                letter-spacing: 0.2px;
            }
            .brand-mark {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }
            .section-title {
                font-size: 20px;
            }
            .category-hero-content h1 {
                font-size: 22px;
            }
            .btn-primary,
            .btn-outline {
                padding: 11px 18px;
                font-size: 14px;
            }
            .card-body {
                padding: 14px 14px 16px;
            }
            .timeline-content {
                padding: 12px 14px;
            }
            .device-card {
                padding: 14px;
            }
            .cta-text h3 {
                font-size: 20px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0F1B2E;
            --bg-tertiary: #12233A;
            --accent: #22D3EE;
            --accent-glow: rgba(34, 211, 238, 0.35);
            --accent-dim: rgba(34, 211, 238, 0.12);
            --text-primary: #F4F7FB;
            --text-secondary: #C7D2E0;
            --text-muted: #8A96A8;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-glass: rgba(255, 255, 255, 0.18);
            --card-glass-bg: rgba(255, 255, 255, 0.06);
            --card-glass-bg-strong: rgba(255, 255, 255, 0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-deep: 0 20px 40px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.3, 0.1, 0.2, 1);
            --section-pad: 72px 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: min(1180px, 92%);
            margin: 0 auto;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
            position: relative;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, #22D3EE 0%, #1E40AF 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.35);
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 17px;
            font-weight: 700;
            letter-spacing: 0.3px;
            background: linear-gradient(90deg, #ffffff 0%, #d4f4ff 60%, #22D3EE 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
            flex: 1;
            justify-content: flex-end;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
        }

        .nav-link.active {
            color: var(--accent);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--accent-glow);
        }

        .mega-trigger-wrap {
            position: relative;
        }

        .mega-trigger {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .mega-trigger:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(34, 211, 238, 0.06);
        }

        .mega-trigger .arrow {
            font-size: 10px;
            transition: transform var(--transition);
        }

        .mega-panel {
            position: absolute;
            top: calc(100% + 12px);
            right: 0;
            width: min(720px, 90vw);
            background: rgba(15, 27, 46, 0.95);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 24px;
            display: grid;
            grid-template-columns: 1fr 1.2fr 1.2fr;
            gap: 22px;
            box-shadow: var(--shadow-deep), var(--shadow-glow);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all var(--transition);
            z-index: 1001;
        }

        .mega-trigger-wrap:hover .mega-panel,
        .mega-trigger-wrap:focus-within .mega-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .mega-col-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.4px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .mega-hot-list li a {
            display: block;
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .mega-hot-list li a:hover {
            background: var(--accent-dim);
            color: var(--accent);
            padding-left: 14px;
        }

        .mega-card-mini {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 12px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .mega-card-mini img {
            width: 100%;
            border-radius: var(--radius-sm);
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .mcm-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .mcm-time {
            font-size: 12px;
            color: var(--text-muted);
        }

        .mega-entry-card {
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.15), rgba(30, 64, 175, 0.15));
            border: 1px solid rgba(34, 211, 238, 0.35);
            border-radius: var(--radius-md);
            padding: 16px;
            transition: all var(--transition);
            text-align: left;
        }

        .mega-entry-card:hover {
            box-shadow: var(--shadow-glow);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .mec-icon {
            font-size: 26px;
        }

        .mec-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
        }

        .mec-sub {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            position: relative;
            z-index: 1100;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            transition: all var(--transition);
            border-radius: 2px;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Main ===== */
        .site-main {
            flex: 1;
        }

        section {
            padding: var(--section-pad);
        }

        .section-alt {
            background: var(--bg-secondary);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            width: 22px;
            height: 2px;
            background: var(--accent);
            box-shadow: 0 0 8px var(--accent-glow);
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ===== Article Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 20px 0 6px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

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

        .breadcrumb .sep {
            color: var(--accent);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }

        /* ===== Article Hero (non-Hero style) ===== */
        .article-hero {
            padding: 28px 0 36px;
            border-bottom: 1px solid var(--border-light);
        }

        .article-hero-inner {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .article-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            letter-spacing: 0.3px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .article-meta .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--accent-dim);
            color: var(--accent);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid rgba(34, 211, 238, 0.25);
        }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 40px 0 56px;
        }

        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text-secondary);
            max-width: 800px;
        }

        .article-body p {
            margin-bottom: 22px;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 36px 0 16px;
            line-height: 1.5;
            padding-left: 12px;
            border-left: 3px solid var(--accent);
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 28px 0 12px;
            line-height: 1.5;
        }

        .article-body blockquote {
            background: var(--card-glass-bg);
            border-left: 3px solid var(--accent);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 18px 22px;
            margin: 24px 0;
            font-size: 16px;
            color: var(--text-primary);
            line-height: 1.8;
        }

        .article-body ul,
        .article-body ol {
            margin: 16px 0 22px;
            padding-left: 24px;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: 8px;
            list-style: disc;
        }

        .article-body ol li {
            list-style: decimal;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 22px 0;
            border: 1px solid var(--border-light);
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .article-body hr {
            border: none;
            height: 1px;
            background: var(--border-light);
            margin: 32px 0;
        }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
        }

        .article-not-found p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-secondary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            margin-top: 28px;
        }

        .related-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent);
            box-shadow: var(--shadow-glow);
        }

        .related-card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .related-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .related-card:hover .related-card-img img {
            transform: scale(1.04);
        }

        .related-card-body {
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .related-card-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .related-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 10px;
        }

        .related-empty {
            text-align: center;
            padding: 40px;
            color: var(--text-muted);
            font-size: 15px;
            background: var(--card-glass-bg);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-light);
        }

        /* ===== Device Section ===== */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
            margin-top: 28px;
        }

        .device-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .device-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-glow);
            background: var(--card-glass-bg-strong);
        }

        .device-icon {
            font-size: 32px;
        }

        .device-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .device-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.08), rgba(30, 64, 175, 0.08));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-xl);
            padding: 48px 32px;
            text-align: center;
            margin: 0 auto;
        }

        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            letter-spacing: 0.3px;
            position: relative;
        }

        .btn-primary {
            background: linear-gradient(135deg, #22D3EE 0%, #1E40AF 100%);
            color: #fff;
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
        }

        .btn-primary:hover {
            box-shadow: 0 0 28px rgba(34, 211, 238, 0.55);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }

        .btn-primary:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.3);
            filter: brightness(0.95);
        }

        .btn-secondary {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-glass);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
        }

        /* ===== Disclaimer Section ===== */
        .disclaimer-section {
            padding: 32px 0;
        }

        .disclaimer-card {
            background: var(--card-glass-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .disclaimer-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        /* ===== Back to list ===== */
        .back-section {
            padding: 20px 0 48px;
            text-align: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #080B12;
            border-top: 1px solid var(--border-light);
            padding: 48px 0 32px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .brand-name {
            font-size: 18px;
            margin-bottom: 12px;
            display: inline-block;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ===== Reveal animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 24px;
            }
            .article-hero h1 {
                font-size: 26px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px 0;
            }
            .header-inner {
                height: 58px;
                gap: 12px;
            }
            .brand-name {
                font-size: 14px;
                letter-spacing: 0.2px;
            }
            .brand-mark {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }
            .main-nav {
                position: fixed;
                top: 58px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
                display: none;
                z-index: 999;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                font-size: 16px;
                padding: 12px 8px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-link.active::after {
                display: none;
            }
            .mega-trigger-wrap {
                width: 100%;
            }
            .mega-trigger {
                width: 100%;
                justify-content: space-between;
                font-size: 16px;
                padding: 12px 8px;
                border: none;
                border-radius: var(--radius-sm);
            }
            .mega-trigger:hover {
                background: rgba(34, 211, 238, 0.06);
            }
            .mega-panel {
                position: static;
                width: 100%;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
                grid-template-columns: 1fr;
                gap: 14px;
                padding: 14px;
                margin-top: 6px;
                border: 1px solid var(--border-light);
                box-shadow: none;
            }
            .mega-trigger-wrap.panel-open .mega-panel {
                display: grid;
            }
            .mega-trigger-wrap.panel-open .mega-trigger .arrow {
                transform: rotate(180deg);
            }
            .hamburger {
                display: flex;
            }
            .device-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .article-hero h1 {
                font-size: 22px;
            }
            .article-body {
                font-size: 16px;
                line-height: 1.85;
            }
            .article-body h2 {
                font-size: 20px;
            }
            .article-body h3 {
                font-size: 18px;
            }
            .breadcrumb .current {
                max-width: 160px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-pad: 40px 0;
            }
            .container {
                width: 94%;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-hero h1 {
                font-size: 20px;
            }
            .article-meta {
                gap: 8px;
                font-size: 12px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
            .cta-section {
                padding: 32px 18px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
            .footer-bottom {
                font-size: 12px;
            }
            .brand-name {
                font-size: 13px;
            }
        }