/* roulang page: index */
:root {
            --primary: #0a0e27;
            --primary-light: #1a2a5c;
            --accent: #00e5ff;
            --accent-hover: #33ebff;
            --accent-glow: rgba(0, 229, 255, 0.6);
            --purple-hover: #3b1f8e;
            --bg-body: #0a1028;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.12);
            --border-glass: rgba(255, 255, 255, 0.15);
            --text-primary: #e0e6f0;
            --text-secondary: #8899b0;
            --text-muted: #6a7a90;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }
        /* ===== Glassmorphism ===== */
        .glass {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .glass:hover {
            background: var(--bg-card-hover);
            border-color: rgba(0, 229, 255, 0.3);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 229, 255, 0.1);
        }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .glass-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(0, 229, 255, 0.35);
            transform: translateY(-6px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 229, 255, 0.08);
        }
        /* ===== Buttons ===== */
        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: linear-gradient(135deg, var(--accent), #00b8d4);
            color: #0a0e27;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.2);
        }
        .btn-accent:hover {
            background: linear-gradient(135deg, var(--accent-hover), #00cce0);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.5);
            transform: translateY(-2px);
            color: #0a0e27;
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            background: transparent;
            color: var(--accent);
            font-weight: 600;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
            transform: translateY(-2px);
            color: var(--accent-hover);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1.2rem;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
        }
        .btn-ghost:active {
            transform: scale(0.97);
        }
        /* ===== Badge ===== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border-radius: 9999px;
            background: linear-gradient(135deg, var(--accent), #00b8d4);
            color: #0a0e27;
            text-transform: uppercase;
        }
        .badge-hot {
            background: linear-gradient(135deg, #ff6b35, #ff2d55);
            color: #fff;
            box-shadow: 0 0 20px rgba(255, 45, 85, 0.4);
        }
        .badge-purple {
            background: linear-gradient(135deg, #7c3aed, #3b1f8e);
            color: #fff;
        }
        /* ===== Section Spacing ===== */
        section {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            section {
                padding: 3rem 0;
            }
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.75rem;
            background: linear-gradient(135deg, #fff, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            text-align: center;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 3rem auto;
            font-size: 1.05rem;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }
        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 39, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: 68px;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), #3b1f8e);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            font-weight: 900;
        }
        .logo span {
            color: var(--accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }
        .nav-links>li {
            position: relative;
        }
        .nav-links>li>a {
            display: flex;
            align-items: center;
            padding: 0.5rem 1.1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links>li>a:hover,
        .nav-links>li>a.active {
            color: var(--accent);
            background: rgba(0, 229, 255, 0.06);
        }
        .nav-links>li>a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--accent-glow);
        }
        /* Mega dropdown */
        .mega-trigger {
            cursor: pointer;
        }
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            width: 680px;
            max-width: 90vw;
            background: rgba(10, 14, 39, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
            padding: 1.8rem 2rem;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: var(--transition);
            z-index: 1001;
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.5rem;
        }
        .mega-trigger:hover .mega-panel,
        .mega-panel:hover {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(4px);
        }
        .mega-panel h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.8rem;
        }
        .mega-panel ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        .mega-panel ul li a {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.45rem 0.6rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mega-panel ul li a:hover {
            background: rgba(0, 229, 255, 0.06);
            color: var(--accent);
        }
        .mega-panel .mega-cta {
            margin-top: 1rem;
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
        }
        .mega-panel .mega-cta a {
            flex: 1;
            min-width: 100px;
            text-align: center;
            padding: 0.5rem 0.8rem;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent);
            border: 1px solid rgba(0, 229, 255, 0.2);
            transition: var(--transition);
        }
        .mega-panel .mega-cta a:hover {
            background: var(--accent);
            color: #0a0e27;
            border-color: var(--accent);
        }
        .mega-panel .mega-card {
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            padding: 0.8rem;
            border: 1px solid rgba(255, 255, 255, 0.04);
            transition: var(--transition);
        }
        .mega-panel .mega-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(0, 229, 255, 0.15);
        }
        .mega-panel .mega-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        /* Mobile nav */
        .mobile-nav {
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 14, 39, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            padding: 2rem 1.5rem;
            display: none;
            flex-direction: column;
            gap: 0.5rem;
            overflow-y: auto;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            display: block;
            padding: 0.8rem 1rem;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--accent);
            background: rgba(0, 229, 255, 0.06);
        }
        .mobile-nav .mega-cta-mobile {
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-nav .mega-cta-mobile a {
            text-align: center;
            padding: 0.7rem;
            font-size: 1rem;
            background: rgba(0, 229, 255, 0.08);
            color: var(--accent);
            border: 1px solid rgba(0, 229, 255, 0.15);
            border-radius: var(--radius-sm);
        }
        .mobile-nav .mega-cta-mobile a:hover {
            background: var(--accent);
            color: #0a0e27;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mega-panel {
                display: none !important;
            }
            .site-header .container {
                padding: 0 1rem;
            }
        }
        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(165deg, #0a0e27 0%, #0d1b3b 40%, #1a0a2e 100%);
            overflow: hidden;
            padding-top: 68px;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-glow {
            position: absolute;
            top: -20%;
            right: -10%;
            width: 60%;
            height: 80%;
            background: radial-gradient(ellipse, rgba(0, 229, 255, 0.08), transparent 70%);
            pointer-events: none;
        }
        .hero-glow-2 {
            position: absolute;
            bottom: -10%;
            left: -5%;
            width: 50%;
            height: 60%;
            background: radial-gradient(ellipse, rgba(59, 31, 142, 0.1), transparent 70%);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 4rem 1.5rem;
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #fff 50%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p.sub {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 2.2rem auto;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 3rem;
            flex-wrap: wrap;
        }
        .hero-stats .stat {
            text-align: center;
        }
        .hero-stats .stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stats .stat .label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
            .hero p.sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stats .stat .num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-actions .btn-accent,
            .hero-actions .btn-outline {
                width: 100%;
            }
        }
        /* ===== Steps / Ladder ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .step-card {
            padding: 2rem 1.5rem;
            text-align: center;
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            transform: translateY(-6px) scale(1.02);
            border-color: rgba(0, 229, 255, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 229, 255, 0.05);
        }
        .step-card .step-num {
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(0, 229, 255, 0.15);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        .step-card:nth-child(2) .step-num {
            color: rgba(0, 229, 255, 0.25);
        }
        .step-card:nth-child(3) .step-num {
            color: rgba(0, 229, 255, 0.35);
        }
        .step-card:nth-child(4) .step-num {
            color: rgba(0, 229, 255, 0.5);
        }
        .step-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: #fff;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .step-card .step-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== Compare Table ===== */
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .compare-card {
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            padding: 2rem 1.5rem;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .compare-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 255, 0.25);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
        }
        .compare-card.featured {
            border-color: var(--accent);
            background: rgba(0, 229, 255, 0.05);
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.06);
        }
        .compare-card.featured::before {
            content: '热荐';
            position: absolute;
            top: 1rem;
            right: 1rem;
            padding: 0.2rem 0.8rem;
            font-size: 0.75rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent), #00b8d4);
            color: #0a0e27;
            border-radius: 9999px;
        }
        .compare-card .plan-name {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }
        .compare-card .plan-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 0.2rem;
        }
        .compare-card .plan-price sub {
            font-size: 0.9rem;
            font-weight: 400;
            color: var(--text-muted);
        }
        .compare-card .plan-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }
        .compare-card ul.features {
            list-style: none;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
            margin-bottom: 1.8rem;
        }
        .compare-card ul.features li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .compare-card ul.features li .icon-check {
            color: var(--accent);
            font-size: 0.85rem;
        }
        .compare-card ul.features li .icon-cross {
            color: #ff4d6a;
            font-size: 0.85rem;
        }
        .compare-card .btn-plan {
            width: 100%;
        }
        @media (max-width: 900px) {
            .compare-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin: 0 auto;
            }
        }
        /* ===== Countdown ===== */
        .countdown-section {
            background: linear-gradient(165deg, #0d1b3b, #1a0a2e);
            position: relative;
            overflow: hidden;
        }
        .countdown-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.05), transparent 70%);
            pointer-events: none;
        }
        .countdown-box {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }
        .countdown-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 1rem 1.8rem;
            min-width: 90px;
        }
        .countdown-item .num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            font-variant-numeric: tabular-nums;
        }
        .countdown-item .label {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        @media (max-width: 480px) {
            .countdown-item {
                padding: 0.8rem 1.2rem;
                min-width: 70px;
            }
            .countdown-item .num {
                font-size: 2rem;
            }
            .countdown-box {
                gap: 0.8rem;
            }
        }
        /* ===== Form ===== */
        .form-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            max-width: 600px;
            margin: 0 auto;
            justify-content: center;
        }
        .form-inline input {
            flex: 1 1 180px;
            padding: 0.8rem 1.2rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.95rem;
            transition: var(--transition);
            outline: none;
        }
        .form-inline input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.1);
            background: rgba(255, 255, 255, 0.08);
        }
        .form-inline input::placeholder {
            color: var(--text-muted);
        }
        .form-inline .btn-accent {
            flex: 0 0 auto;
        }
        @media (max-width: 480px) {
            .form-inline input {
                flex: 1 1 100%;
            }
            .form-inline .btn-accent {
                width: 100%;
            }
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 740px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.15);
        }
        .faq-item summary {
            padding: 1.2rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '▸';
            color: var(--accent);
            font-size: 1.2rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::before {
            transform: rotate(90deg);
        }
        .faq-item summary:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-item .answer {
            padding: 0 1.5rem 1.2rem 1.5rem;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* ===== News List (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .news-card {
            border-radius: var(--radius-md);
            background: var(--bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-glass);
            padding: 1.5rem;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 229, 255, 0.2);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }
        .news-card .cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 0.4rem;
        }
        .news-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            line-height: 1.4;
            color: #fff;
        }
        .news-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .news-card .meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 0.8rem;
        }
        .news-card .meta a {
            color: var(--accent);
            font-weight: 500;
        }
        .news-card .meta a:hover {
            text-decoration: underline;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--text-muted);
            font-size: 1rem;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: rgba(10, 14, 39, 0.95);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 4rem 0 2rem 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 2.5rem;
        }
        .footer-grid h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-grid p,
        .footer-grid a {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .footer-grid a:hover {
            color: var(--accent);
        }
        .footer-grid .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .footer-grid .footer-logo span {
            color: var(--accent);
        }
        .footer-grid .social-links {
            display: flex;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .footer-grid .social-links a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--text-secondary);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-grid .social-links a:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
        }
        .footer-bottom {
            margin-top: 3rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* ===== Misc Utilities ===== */
        .grid-cols-auto {
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        }
        .text-glow {
            text-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
        }
        .border-accent {
            border-color: var(--accent) !important;
        }
        .bg-accent-soft {
            background: rgba(0, 229, 255, 0.05);
        }
        .focus-ring:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        /* Smooth reveal */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
            }
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }
        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }

/* roulang page: article */
:root {
            --primary: #0d1b3b;
            --secondary: #1a3a5c;
            --accent: #00e5ff;
            --accent-hover: #3b1f8e;
            --bg-deep: #0a1028;
            --text-main: #e0e6f0;
            --text-muted: #8899b0;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
            --transition-base: 0.3s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-deep);
            color: var(--text-main);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition-base); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 1rem; }
        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10,16,40,0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.08);
            height: 64px;
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1rem;
            height: 100%;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            white-space: nowrap;
        }
        .logo span { color: var(--accent); }
        .logo i { font-size: 1.5rem; color: var(--accent); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
            height: 100%;
        }
        .nav-links > li {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }
        .nav-links > li > a {
            padding: 0 1rem;
            font-size: 0.95rem;
            color: var(--text-muted);
            height: 100%;
            display: flex;
            align-items: center;
            transition: var(--transition-base);
            border-bottom: 2px solid transparent;
            white-space: nowrap;
        }
        .nav-links > li > a:hover,
        .nav-links > li > a.active {
            color: #fff;
            border-bottom-color: var(--accent);
        }
        .nav-links > li > a.active { color: var(--accent); }
        .mega-trigger { position: relative; }
        .mega-panel {
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            min-width: 680px;
            background: rgba(13,27,59,0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(0,229,255,0.2);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            padding: 1.5rem;
            display: none;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.5rem;
            box-shadow: 0 20px 60px rgba(0,0,0,0.6);
            z-index: 999;
        }
        .mega-trigger:hover .mega-panel { display: grid; }
        .mega-panel h4 {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--accent);
            margin-bottom: 0.75rem;
            border-bottom: 1px solid rgba(0,229,255,0.15);
            padding-bottom: 0.5rem;
        }
        .mega-panel ul { list-style: none; padding: 0; margin: 0; }
        .mega-panel ul li { margin-bottom: 0.4rem; }
        .mega-panel ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 0;
            transition: var(--transition-base);
        }
        .mega-panel ul li a:hover { color: #fff; padding-left: 4px; }
        .mega-card {
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-sm);
            padding: 0.75rem;
            margin-bottom: 0.5rem;
            border: 1px solid rgba(255,255,255,0.06);
        }
        .mega-card p { font-size: 0.82rem; color: var(--text-muted); }
        .mega-cta { display: flex; flex-direction: column; gap: 0.5rem; }
        .mega-cta a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1rem;
            background: rgba(0,229,255,0.1);
            border: 1px solid rgba(0,229,255,0.2);
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 0.9rem;
            transition: var(--transition-base);
        }
        .mega-cta a:hover { background: rgba(0,229,255,0.2); border-color: var(--accent); }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 0.25rem; }
        /* Breadcrumb */
        .article-breadcrumb {
            padding: 1.5rem 0 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb .sep { margin: 0 0.4rem; color: rgba(255,255,255,0.2); }
        .article-breadcrumb .current { color: var(--accent); }
        /* Article TDK */
        .article-tdk {
            padding: 1rem 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            margin-bottom: 2rem;
        }
        .article-tdk h1 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 0.75rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .article-meta i { color: var(--accent); margin-right: 0.35rem; }
        /* Article Content */
        .article-content {
            padding: 1.5rem 0 2.5rem;
            max-width: 860px;
            margin: 0 auto;
        }
        .article-content h2 { font-size: 1.6rem; color: #fff; margin: 2rem 0 1rem; border-left: 4px solid var(--accent); padding-left: 0.75rem; }
        .article-content h3 { font-size: 1.3rem; color: #e0e6f0; margin: 1.5rem 0 0.75rem; }
        .article-content h4 { font-size: 1.1rem; color: #d0d8e8; margin: 1.2rem 0 0.6rem; }
        .article-content p { margin-bottom: 1.2rem; color: var(--text-main); line-height: 1.9; }
        .article-content ul, .article-content ol { margin: 1rem 0 1.2rem 1.8rem; color: var(--text-main); }
        .article-content li { margin-bottom: 0.4rem; }
        .article-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; background: rgba(255,255,255,0.04); border-radius: var(--radius-sm); overflow: hidden; }
        .article-content th, .article-content td { padding: 0.7rem 1rem; border: 1px solid rgba(255,255,255,0.08); text-align: left; }
        .article-content th { background: rgba(0,229,255,0.1); color: var(--accent); font-weight: 600; }
        .article-content blockquote { margin: 1.5rem 0; padding: 1rem 1.5rem; border-left: 4px solid var(--accent); background: rgba(0,229,255,0.06); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: #d0d8e8; }
        .article-content img { margin: 1.5rem auto; border-radius: var(--radius-md); box-shadow: var(--shadow-card); max-width: 100%; }
        .article-content code { background: rgba(0,229,255,0.1); padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.9rem; color: var(--accent); }
        .article-content pre { background: rgba(0,0,0,0.4); padding: 1.2rem; border-radius: var(--radius-sm); overflow-x: auto; margin: 1.5rem 0; border: 1px solid rgba(255,255,255,0.06); }
        .article-content pre code { background: none; padding: 0; color: var(--text-main); }
        /* Not Found */
        .article-notfound {
            text-align: center;
            padding: 4rem 2rem;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255,255,255,0.06);
        }
        .article-notfound i { font-size: 3rem; color: var(--text-muted); margin-bottom: 1rem; }
        .article-notfound h2 { font-size: 1.8rem; color: #fff; margin-bottom: 0.75rem; }
        .article-notfound p { color: var(--text-muted); margin-bottom: 1.5rem; }
        /* Related */
        .related-section { padding: 2.5rem 0; border-top: 1px solid rgba(255,255,255,0.06); }
        .related-section h2 { font-size: 1.6rem; color: #fff; margin-bottom: 1.5rem; text-align: center; }
        .related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
        .related-card {
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition-base);
        }
        .related-card:hover { transform: translateY(-4px); border-color: rgba(0,229,255,0.3); box-shadow: 0 12px 40px rgba(0,0,0,0.5); }
        .related-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .related-body { padding: 0.8rem 1rem 1rem; }
        .related-body h3 { font-size: 0.95rem; color: #fff; margin-bottom: 0.35rem; line-height: 1.4; font-weight: 600; }
        .related-body p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 2rem;
            background: rgba(0,229,255,0.1);
            border: 1px solid rgba(0,229,255,0.3);
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 0.95rem;
            transition: var(--transition-base);
            margin-top: 1.5rem;
        }
        .btn-back:hover { background: rgba(0,229,255,0.2); border-color: var(--accent); transform: translateX(-4px); }
        .btn-back i { color: var(--accent); }
        /* Footer */
        .site-footer {
            background: rgba(13,27,59,0.9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
        .footer-logo { font-size: 1.2rem; font-weight: 700; color: #fff; }
        .footer-logo span { color: var(--accent); }
        .site-footer h4 { font-size: 0.9rem; color: var(--accent); margin-bottom: 0.75rem; text-transform: uppercase; letter-spacing: 1px; }
        .site-footer p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }
        .site-footer a { font-size: 0.85rem; color: var(--text-muted); }
        .site-footer a:hover { color: #fff; }
        .social-links { display: flex; gap: 0.75rem; margin-top: 0.75rem; }
        .social-links a { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06); color: var(--text-muted); transition: var(--transition-base); font-size: 1rem; }
        .social-links a:hover { background: rgba(0,229,255,0.15); color: var(--accent); transform: translateY(-2px); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 1.25rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; font-size: 0.78rem; color: var(--text-muted); }
        /* Mobile Nav */
        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(10,16,40,0.97);
            backdrop-filter: blur(12px);
            z-index: 2000;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 1rem;
        }
        .mobile-menu-overlay.open { display: flex; }
        .mobile-menu-overlay a { font-size: 1.4rem; color: var(--text-muted); padding: 0.5rem 0; }
        .mobile-menu-overlay a:hover, .mobile-menu-overlay a.active { color: var(--accent); }
        .mobile-menu-overlay .close-btn {
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            font-size: 2rem;
            color: #fff;
            background: none;
            border: none;
            cursor: pointer;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .mega-panel { min-width: 500px; left: auto; right: 0; transform: none; }
        }
        @media (max-width: 768px) {
            .nav-links > li > a { padding: 0 0.6rem; font-size: 0.85rem; }
            .mega-panel { min-width: 300px; right: 0; left: auto; transform: none; grid-template-columns: 1fr; }
            .article-tdk h1 { font-size: 1.5rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .header-inner { padding: 0 0.75rem; }
            .nav-toggle { display: block; }
            .nav-links { display: none; }
            .article-content { padding-left: 0.5rem; padding-right: 0.5rem; }
        }
        @media (max-width: 520px) {
            .article-tdk h1 { font-size: 1.25rem; }
            .article-meta { flex-direction: column; gap: 0.4rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .logo { font-size: 1.1rem; }
        }
        /* Glass helpers */
        .glass-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 2rem;
            background: linear-gradient(135deg, var(--accent), #0099cc);
            border: none;
            border-radius: var(--radius-sm);
            color: #0a1028;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 0 24px rgba(0,229,255,0.5); color: #0a1028; }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            background: transparent;
            border: 1px solid rgba(0,229,255,0.4);
            border-radius: var(--radius-sm);
            color: var(--accent);
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .btn-outline:hover { background: rgba(0,229,255,0.1); border-color: var(--accent); color: #fff; }
        .tag {
            display: inline-block;
            padding: 0.2rem 0.7rem;
            font-size: 0.75rem;
            border-radius: 20px;
            background: rgba(0,229,255,0.12);
            color: var(--accent);
            border: 1px solid rgba(0,229,255,0.2);
        }
        .badge {
            display: inline-block;
            padding: 0.15rem 0.6rem;
            font-size: 0.7rem;
            border-radius: 12px;
            background: var(--accent);
            color: #0a1028;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .badge-hot { background: #ff4757; color: #fff; }
        /* active state for mobile overlay */
        .mobile-menu-overlay a.active { color: var(--accent); border-bottom: 2px solid var(--accent); }
        /* focus state for accessibility */
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* roulang page: category1 */
:root {
            --primary: #0d1b3b;
            --primary-light: #1a3a5c;
            --accent: #00e5ff;
            --accent-dark: #0099cc;
            --bg-body: #0a1028;
            --bg-card: rgba(255, 255, 255, 0.06);
            --bg-card-hover: rgba(255, 255, 255, 0.12);
            --text-main: #e0e6f0;
            --text-muted: #8899b0;
            --text-accent: #00e5ff;
            --border-glass: rgba(255, 255, 255, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --font-stack: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --header-height: 60px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.8;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.2s, text-shadow 0.2s;
        }
        a:hover {
            color: #fff;
            text-shadow: 0 0 8px rgba(0, 229, 255, 0.3);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: var(--font-stack);
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 16, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }
        .logo span {
            color: var(--accent);
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 0.2rem;
        }
        .nav-links>li {
            position: relative;
        }
        .nav-links>li>a {
            display: block;
            padding: 0.5rem 0.9rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: color 0.2s, background 0.2s;
            font-weight: 500;
            white-space: nowrap;
        }
        .nav-links>li>a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links>li>a.active {
            color: var(--accent);
            box-shadow: inset 0 -2px 0 var(--accent);
        }
        .mega-trigger {
            position: relative;
        }
        .mega-trigger .mega-panel {
            display: none;
            position: absolute;
            top: 100%;
            right: 0;
            width: 640px;
            background: rgba(10, 16, 40, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.5rem;
            z-index: 200;
        }
        .mega-trigger:hover .mega-panel,
        .mega-trigger:focus-within .mega-panel {
            display: grid;
        }
        .mega-panel h4 {
            color: var(--accent);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 0.8rem;
            border-bottom: 1px solid var(--border-glass);
            padding-bottom: 0.4rem;
        }
        .mega-panel ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
        }
        .mega-panel ul li a {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 0;
            color: var(--text-muted);
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            transition: color 0.2s, background 0.2s;
        }
        .mega-panel ul li a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }
        .mega-card {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 0.6rem 0.8rem;
            margin-bottom: 0.5rem;
            border: 1px solid var(--border-glass);
            transition: background 0.2s;
        }
        .mega-card:hover {
            background: var(--bg-card-hover);
        }
        .mega-cta {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .mega-cta a {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 0.8rem;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            color: var(--text-main);
            font-size: 0.9rem;
            transition: background 0.2s, border-color 0.2s;
        }
        .mega-cta a:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: var(--accent);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.2rem 0.4rem;
        }
        @media (max-width: 767px) {
            .nav-links {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(10, 16, 40, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 1.5rem 1rem;
                gap: 0.2rem;
                overflow-y: auto;
                z-index: 300;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links>li>a {
                padding: 0.8rem 1rem;
                font-size: 1.05rem;
                border-radius: var(--radius-sm);
            }
            .mega-trigger .mega-panel {
                position: static;
                width: 100%;
                background: transparent;
                backdrop-filter: none;
                border: none;
                box-shadow: none;
                padding: 0.5rem 0 0.5rem 1rem;
                grid-template-columns: 1fr;
                gap: 1rem;
                display: none;
            }
            .mega-trigger.open .mega-panel {
                display: grid;
            }
            .mega-trigger .mega-panel>div {
                background: var(--bg-card);
                border-radius: var(--radius-sm);
                padding: 1rem;
                border: 1px solid var(--border-glass);
            }
            .nav-toggle {
                display: block;
            }
            .logo {
                font-size: 1.15rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
        }
        @media (min-width: 768px) {
            .nav-toggle {
                display: none;
            }
            .nav-links {
                display: flex;
            }
        }
        /* ===== Hero ===== */
        .hero-race {
            min-height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            isolation: isolate;
            padding: 4rem 1rem;
        }
        .hero-race::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 16, 40, 0.88) 0%, rgba(13, 27, 59, 0.75) 100%);
            z-index: 1;
        }
        .hero-race>* {
            position: relative;
            z-index: 2;
        }
        .hero-race h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            line-height: 1.2;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .hero-race h1 span {
            color: var(--accent);
        }
        .hero-race .sub {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-top: 1rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-race .hero-cta {
            margin-top: 2rem;
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-race .hero-cta a {
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .hero-race .hero-cta .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0a1028;
            border: none;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
        }
        .hero-race .hero-cta .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.6);
            transform: translateY(-2px);
            color: #0a1028;
        }
        .hero-race .hero-cta .btn-outline {
            border: 1px solid var(--accent);
            color: var(--accent);
            background: transparent;
        }
        .hero-race .hero-cta .btn-outline:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }
        @media (max-width: 767px) {
            .hero-race h1 {
                font-size: 1.8rem;
            }
            .hero-race .sub {
                font-size: 1rem;
            }
            .hero-race {
                min-height: 60vh;
                padding: 3rem 1rem;
            }
            .hero-race .hero-cta a {
                padding: 0.6rem 1.6rem;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 480px) {
            .hero-race h1 {
                font-size: 1.5rem;
            }
        }
        /* ===== Section ===== */
        .section {
            padding: 4rem 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .section-title p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0.6rem auto 0;
            font-size: 1rem;
        }
        @media (max-width: 767px) {
            .section {
                padding: 2.5rem 0;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
        }
        /* ===== Card ===== */
        .card-glass {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
        }
        .card-glass:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 229, 255, 0.5);
            box-shadow: 0 12px 40px rgba(0, 229, 255, 0.15);
        }
        .card-glass .card-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 0.8rem;
        }
        .card-glass h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.4rem;
        }
        .card-glass p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 640px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        /* ===== Scene Grid ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        @media (min-width: 640px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .scene-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .scene-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform 0.3s, border-color 0.3s;
            display: flex;
            flex-direction: column;
        }
        .scene-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 229, 255, 0.4);
        }
        .scene-card .scene-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .scene-card .scene-body {
            padding: 1.2rem 1.2rem 1.5rem;
            flex: 1;
        }
        .scene-card .scene-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.3rem;
        }
        .scene-card .scene-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            counter-reset: step;
        }
        @media (min-width: 640px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.2rem;
            text-align: center;
            transition: transform 0.3s, border-color 0.3s;
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 229, 255, 0.4);
        }
        .step-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0a1028;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
        }
        .step-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.3rem;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.5;
        }
        /* ===== Sport Categories ===== */
        .sport-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.2rem;
        }
        @media (min-width: 640px) {
            .sport-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .sport-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            padding: 1.5rem 0.8rem;
            text-align: center;
            transition: transform 0.3s, border-color 0.3s, background 0.3s;
            cursor: default;
        }
        .sport-item:hover {
            transform: translateY(-3px);
            border-color: var(--accent);
            background: rgba(0, 229, 255, 0.06);
        }
        .sport-item i {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 0.5rem;
        }
        .sport-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
        }
        .sport-item p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 0.2rem;
        }
        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }
        .faq-item summary {
            padding: 1rem 1.2rem;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            list-style: none;
            font-size: 1rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.75rem;
            color: var(--accent);
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item[open] summary::before {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.2rem 1rem 2.4rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0d1b3b 0%, #1a0a3e 100%);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
            text-align: center;
            padding: 4rem 1rem;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
        }
        .cta-section p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0.8rem auto 1.5rem;
            font-size: 1.05rem;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #0a1028;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
            transition: all 0.3s;
        }
        .cta-section .cta-btn:hover {
            box-shadow: 0 0 50px rgba(0, 229, 255, 0.6);
            transform: translateY(-2px);
            color: #0a1028;
        }
        @media (max-width: 767px) {
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .cta-btn {
                padding: 0.7rem 1.8rem;
                font-size: 1rem;
            }
        }
        /* ===== Footer ===== */
        .site-footer {
            background: rgba(10, 16, 40, 0.9);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-glass);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }
        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-logo span {
            color: var(--accent);
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.8rem;
        }
        .site-footer a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .site-footer a:hover {
            color: var(--accent);
            text-shadow: none;
        }
        .social-links {
            display: flex;
            gap: 0.8rem;
            margin-top: 0.8rem;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            color: var(--text-muted);
            font-size: 1rem;
            transition: all 0.3s;
        }
        .social-links a:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            margin-top: 2rem;
            padding-top: 1.2rem;
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-muted);
            text-align: center;
        }
        @media (min-width: 640px) {
            .footer-bottom {
                flex-direction: row;
            }
        }
        /* ===== BGLines ===== */
        .bg-glow {
            position: relative;
        }
        .bg-glow::after {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }
        .bg-glow>* {
            position: relative;
            z-index: 1;
        }
        /* ===== Misc ===== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 229, 255, 0.15);
            color: var(--accent);
            border: 1px solid rgba(0, 229, 255, 0.3);
        }
        .text-accent {
            color: var(--accent);
        }
        .section-divider {
            border: none;
            height: 1px;
            background: linear-gradient(to right, transparent, var(--border-glass), transparent);
            margin: 0;
        }
        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: category2 */
:root {
            --primary: #0d1b3b;
            --secondary: #1a3a5c;
            --accent: #00e5ff;
            --accent-purple: #3b1f8e;
            --text-main: #e0e6f0;
            --text-muted: #8899b0;
            --card-bg: rgba(255, 255, 255, 0.06);
            --card-border: rgba(255, 255, 255, 0.15);
            --radius-lg: 16px;
            --radius-sm: 12px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: #0a1028;
            color: var(--text-main);
            line-height: 1.8;
            min-height: 100vh;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #fff;
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 16, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: 60px;
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }
        .logo span {
            color: var(--accent);
        }
        .logo i {
            color: var(--accent);
            font-size: 1.2rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links>li>a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.25rem 0;
            transition: var(--transition);
            position: relative;
            text-decoration: none;
        }
        .nav-links>li>a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0%;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
        }
        .nav-links>li>a:hover::after,
        .nav-links>li>a.active::after {
            width: 100%;
        }
        .nav-links>li>a:hover {
            color: #fff;
            text-decoration: none;
        }
        .nav-links>li>a.active {
            color: var(--accent);
        }

        .mega-trigger {
            position: relative;
        }
        .mega-panel {
            display: none;
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(10, 16, 40, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 1.5rem 2rem;
            width: 640px;
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.5rem;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.25s ease, visibility 0.25s ease;
            pointer-events: none;
        }
        .mega-trigger:hover .mega-panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }
        .mega-panel h4 {
            color: var(--accent);
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
            font-weight: 600;
            letter-spacing: 1px;
        }
        .mega-panel ul {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        .mega-panel ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.25rem 0;
            text-decoration: none;
        }
        .mega-panel ul li a:hover {
            color: #fff;
            text-decoration: none;
        }
        .mega-card {
            background: rgba(255, 255, 255, 0.04);
            border-radius: 8px;
            padding: 0.6rem 0.8rem;
            margin-bottom: 0.5rem;
        }
        .mega-cta {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .mega-cta a {
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.2);
            border-radius: 8px;
            padding: 0.5rem 0.8rem;
            color: var(--accent);
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .mega-cta a:hover {
            background: rgba(0, 229, 255, 0.2);
            color: #fff;
            text-decoration: none;
        }

        /* hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 4px;
        }
        .hamburger span {
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 16, 40, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: flex-start;
            padding: 2rem 1.5rem;
            gap: 1.2rem;
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            color: var(--text-muted);
            font-size: 1.2rem;
            font-weight: 500;
            text-decoration: none;
        }
        .mobile-menu a.active {
            color: var(--accent);
        }
        .mobile-menu a:hover {
            color: #fff;
            text-decoration: none;
        }

        /* ===== Hero ===== */
        .page-hero {
            min-height: 40vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(13, 27, 59, 0.9), rgba(10, 16, 40, 0.95)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            position: relative;
            padding: 4rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 20% 60%, rgba(0, 229, 255, 0.08), transparent 60%);
            pointer-events: none;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 1px;
        }
        .page-hero h1 span {
            color: var(--accent);
        }
        .page-hero p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 1.5rem;
            line-height: 1.8;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(0, 229, 255, 0.12);
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: 30px;
            padding: 0.3rem 1.2rem;
            font-size: 0.85rem;
            color: var(--accent);
            margin-bottom: 1rem;
            letter-spacing: 0.5px;
        }

        /* ===== Sections ===== */
        .section-block {
            padding: 4rem 0;
        }
        .section-block-alt {
            padding: 4rem 0;
            background: rgba(255, 255, 255, 0.02);
        }
        .section-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
            text-align: center;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 2.5rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Cards ===== */
        .glass-card {
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 1.8rem;
            transition: var(--transition);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 229, 255, 0.5);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 229, 255, 0.15);
        }

        .step-card {
            text-align: center;
            padding: 2rem 1.5rem;
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.12);
            border: 2px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent);
            margin: 0 auto 1rem;
        }
        .step-card h3 {
            color: #fff;
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .feature-card {
            padding: 1.8rem;
        }
        .feature-card .icon-wrap {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .feature-card h3 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .tip-card {
            background: rgba(0, 229, 255, 0.04);
            border-left: 4px solid var(--accent);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            padding: 1.2rem 1.5rem;
            margin-bottom: 1rem;
        }
        .tip-card .tip-label {
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .tip-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 0.2rem;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-sm);
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }
        .faq-item summary {
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.6rem;
            list-style: none;
            position: relative;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 400;
            color: var(--accent);
            font-size: 1rem;
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            right: 1.5rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.2rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(13, 27, 59, 0.95), rgba(10, 16, 40, 0.98)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent), #00b3d9);
            color: #0a1028;
            font-weight: 700;
            padding: 0.7rem 2rem;
            border-radius: 40px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-size: 0.95rem;
            letter-spacing: 0.5px;
            text-decoration: none;
        }
        .btn-primary:hover {
            transform: scale(1.03);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.5);
            color: #0a1028;
            text-decoration: none;
        }
        .btn-primary:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 3px;
        }

        .btn-outline {
            display: inline-block;
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
            font-weight: 600;
            padding: 0.6rem 1.8rem;
            border-radius: 40px;
            transition: var(--transition);
            cursor: pointer;
            font-size: 0.9rem;
            text-decoration: none;
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.1);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.3);
            color: var(--accent);
            text-decoration: none;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: rgba(10, 16, 40, 0.95);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .footer-logo span {
            color: var(--accent);
        }
        .site-footer h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 0.8rem;
        }
        .site-footer p,
        .site-footer a {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.8;
            text-decoration: none;
        }
        .site-footer a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 0.8rem;
        }
        .social-links a {
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            color: var(--text-muted);
            font-size: 0.8rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .mega-panel {
                width: 90vw;
                left: 5vw;
                transform: none;
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mega-panel {
                display: none !important;
            }
            .page-hero {
                min-height: 30vh;
                padding: 3rem 1rem;
            }
            .section-block,
            .section-block-alt {
                padding: 2.5rem 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 0.8rem;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .glass-card {
                padding: 1.2rem;
            }
            .step-card {
                padding: 1.2rem 1rem;
            }
            .feature-card {
                padding: 1.2rem;
            }
            .faq-item summary {
                padding: 1rem 1.2rem;
                font-size: 0.9rem;
            }
            .faq-item .faq-answer {
                padding: 0 1.2rem 1rem 1.2rem;
                font-size: 0.85rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 0.5rem 1.2rem;
                font-size: 0.85rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0d1b3b;
            --primary-light: #1a3a5c;
            --accent: #00e5ff;
            --accent-hover: #3b1f8e;
            --bg-body: #0a1028;
            --text-main: #e0e6f0;
            --text-muted: #8899b0;
            --border-glass: rgba(255, 255, 255, 0.15);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-hover: rgba(255, 255, 255, 0.12);
            --radius-card: 16px;
            --radius-sm: 12px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #fff;
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 16, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glass);
            height: 60px;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 60px;
        }
        .logo a {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .logo a:hover {
            text-decoration: none;
            color: var(--accent);
        }
        .logo span {
            color: var(--accent);
            font-size: 1.5rem;
            margin-right: 2px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 0.25rem;
        }
        .nav-links > li > a {
            color: var(--text-muted);
            padding: 0.5rem 0.75rem;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links > li > a:hover {
            color: #fff;
            background: var(--glass-bg-hover);
            text-decoration: none;
        }
        .nav-links > li > a.active {
            color: var(--accent);
            background: rgba(0, 229, 255, 0.08);
        }
        .nav-links > li > a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .mega-trigger {
            position: relative;
        }
        .mega-panel {
            display: none;
            position: absolute;
            top: 100%;
            left: 50%;
            transform: translateX(-50%);
            width: 720px;
            max-width: 90vw;
            background: rgba(13, 27, 59, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glass);
            border-radius: 0 0 var(--radius-card) var(--radius-card);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            z-index: 999;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.5rem;
        }
        .mega-trigger:hover .mega-panel,
        .mega-trigger:focus-within .mega-panel {
            display: grid;
        }
        .mega-panel h4 {
            color: var(--accent);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-glass);
            padding-bottom: 0.5rem;
        }
        .mega-panel ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        .mega-panel ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .mega-panel ul li a:hover {
            color: #fff;
            text-decoration: none;
        }
        .mega-card {
            background: var(--glass-bg);
            border-radius: var(--radius-sm);
            padding: 0.75rem;
            margin-bottom: 0.5rem;
            border: 1px solid var(--border-glass);
        }
        .mega-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .mega-cta {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            margin-top: 0.5rem;
        }
        .mega-cta a {
            background: var(--glass-bg-hover);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            padding: 0.5rem 0.75rem;
            font-size: 0.85rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: var(--transition);
        }
        .mega-cta a:hover {
            background: rgba(0, 229, 255, 0.15);
            border-color: var(--accent);
            text-decoration: none;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem;
        }
        @media (max-width: 767px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(10, 16, 40, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 1rem;
                border-bottom: 1px solid var(--border-glass);
                gap: 0.25rem;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links > li > a {
                padding: 0.75rem 1rem;
                width: 100%;
            }
            .mega-panel {
                position: static;
                width: 100%;
                transform: none;
                grid-template-columns: 1fr;
                gap: 1rem;
                background: rgba(0, 0, 0, 0.3);
                border-radius: var(--radius-sm);
                margin-top: 0.5rem;
                box-shadow: none;
            }
            .mega-trigger:hover .mega-panel {
                display: none;
            }
            .mega-trigger .mega-panel.open {
                display: grid !important;
            }
            .mobile-toggle {
                display: block;
            }
        }
        /* Hero */
        .hero-faq {
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            isolation: isolate;
            padding: 4rem 1rem;
        }
        .hero-faq::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 16, 40, 0.85) 0%, rgba(13, 27, 59, 0.7) 100%);
            z-index: 1;
            isolation: isolate;
        }
        .hero-faq > * {
            position: relative;
            z-index: 2;
        }
        .hero-faq h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        .hero-faq h1 .highlight {
            color: var(--accent);
        }
        .hero-faq p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2rem;
        }
        .hero-faq .cta-group {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-block;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent), #00b8d4);
            color: #0a1028;
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.6);
            color: #0a1028;
            text-decoration: none;
        }
        .btn-secondary {
            display: inline-block;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border-glass);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: var(--glass-bg-hover);
            border-color: var(--accent);
            color: var(--accent);
            text-decoration: none;
        }
        /* Section */
        .section {
            padding: 4rem 0;
        }
        @media (max-width: 767px) {
            .section {
                padding: 2.5rem 0;
            }
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .section-title p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1rem;
        }
        /* Cards */
        .card-glass {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card-glass:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 229, 255, 0.5);
            background: var(--glass-bg-hover);
        }
        .card-glass .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
        .card-glass h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .card-glass p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }
        .faq-item summary {
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            color: #fff;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::before {
            content: 'Q';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.15);
            color: var(--accent);
            font-weight: 800;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            margin-left: auto;
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .answer {
            padding: 0 1.5rem 1.25rem 3.25rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            border-top: 1px solid var(--border-glass);
            margin-top: 0;
        }
        /* Flow */
        .flow-steps {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 2rem;
            counter-reset: step;
        }
        @media (max-width: 767px) {
            .flow-steps {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        .flow-step {
            text-align: center;
            position: relative;
        }
        .flow-step .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), #007a99);
            color: #0a1028;
            font-weight: 800;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.3);
        }
        .flow-step h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
        }
        .flow-step p {
            color: var(--text-muted);
            font-size: 0.9rem;
            max-width: 260px;
            margin: 0 auto;
        }
        .flow-step:not(:last-child)::after {
            content: '›';
            position: absolute;
            right: -1.2rem;
            top: 1.2rem;
            font-size: 2.5rem;
            color: var(--accent);
            opacity: 0.4;
            font-weight: 300;
        }
        @media (max-width: 767px) {
            .flow-step:not(:last-child)::after {
                display: none;
            }
        }
        /* Stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 767px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
        }
        .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: var(--glass-bg-hover);
            border-color: rgba(0, 229, 255, 0.3);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-label {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-top: 0.25rem;
        }
        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, rgba(13, 27, 59, 0.9), rgba(10, 16, 40, 0.95)), url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            padding: 4rem 1rem;
            text-align: center;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-glass);
        }
        .cta-section h2 {
            font-size: clamp(1.8rem, 3vw, 2.2rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 2rem;
            font-size: 1rem;
        }
        /* Footer */
        .site-footer {
            background: rgba(10, 16, 40, 0.95);
            border-top: 1px solid var(--border-glass);
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media (max-width: 767px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-logo span {
            color: var(--accent);
        }
        .site-footer p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.6;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
        .site-footer a {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .site-footer a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        .social-links {
            display: flex;
            gap: 0.75rem;
            margin-top: 0.75rem;
        }
        .social-links a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            background: rgba(0, 229, 255, 0.15);
            border-color: var(--accent);
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-glass);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        @media (max-width: 767px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* Category tags */
        .cat-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: center;
            margin-bottom: 2rem;
        }
        .cat-tag {
            padding: 0.5rem 1.25rem;
            border-radius: 50px;
            background: var(--glass-bg);
            border: 1px solid var(--border-glass);
            color: var(--text-muted);
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .cat-tag:hover,
        .cat-tag.active {
            background: rgba(0, 229, 255, 0.12);
            border-color: var(--accent);
            color: var(--accent);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            .hero-faq {
                min-height: 50vh;
                padding: 3rem 1rem;
            }
            .hero-faq h1 {
                font-size: 1.8rem;
            }
            .cta-group .btn-primary,
            .cta-group .btn-secondary {
                padding: 0.6rem 1.5rem;
                font-size: 0.9rem;
            }
        }