/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #0a192f;
            --color-secondary: #1e3a8a;
            --color-accent: #3b82f6;
            --color-cyan: #06b6d4;
            --color-white: #ffffff;
            --color-gray-light: #94a3b8;
            --color-gray-dark: #64748b;
            --color-bg-dark: #06102b;
            --color-bg-card: rgba(255, 255, 255, 0.05);
            --color-border-glass: rgba(255, 255, 255, 0.1);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: 1px solid rgba(255, 255, 255, 0.1);
            --glass-blur: blur(12px);
            --radius-card: 16px;
            --radius-sm: 6px;
            --radius-btn: 12px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);
            --transition-base: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1280px;
            --section-gap: 6rem;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            font-weight: 400;
            line-height: 1.6;
            background-color: var(--color-primary);
            color: var(--color-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        ul, ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 2rem;
            padding-right: 2rem;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: linear-gradient(180deg, rgba(10, 25, 47, 0.95) 0%, rgba(10, 25, 47, 0.7) 100%);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.02em;
            white-space: nowrap;
            background: linear-gradient(135deg, #ffffff, #94a3b8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.85;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-list a {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            padding: 0.4rem 0;
            position: relative;
            transition: color var(--transition-base);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            transition: width var(--transition-base);
            border-radius: 2px;
        }
        .nav-list a:hover {
            color: var(--color-white);
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a.active {
            color: var(--color-white);
        }
        .nav-list a.active::after {
            width: 100%;
            background: var(--color-cyan);
        }
        .nav-cta-btn {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white) !important;
            padding: 0.5rem 1.5rem !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            box-shadow: var(--shadow-glow);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.7);
            color: var(--color-white) !important;
        }
        .nav-cta-btn::after {
            display: none !important;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: transparent;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .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 {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 25, 47, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2.5rem;
            padding: 2rem;
            opacity: 0;
            transform: translateY(-20px);
            transition: opacity 0.4s ease, transform 0.4s ease;
        }
        .mobile-nav.open {
            display: flex;
            opacity: 1;
            transform: translateY(0);
        }
        .mobile-nav a {
            font-size: 1.4rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--transition-base);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--color-accent);
        }
        .mobile-nav .nav-cta-btn-mobile {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white) !important;
            padding: 0.75rem 2.5rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            box-shadow: var(--shadow-glow);
            margin-top: 1rem;
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .site-header .container {
                height: 64px;
            }
            .site-logo {
                font-size: 1.15rem;
            }
        }
        @media (min-width: 769px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: radial-gradient(ellipse at 50% 40%, #1e3a8a 0%, #0a192f 60%, #06102b 100%);
            overflow: hidden;
            padding-top: 72px;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
            pointer-events: none;
        }
        .hero-glow {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
            pointer-events: none;
            animation: pulseGlow 6s ease-in-out infinite alternate;
        }
        @keyframes pulseGlow {
            0% { opacity: 0.6; transform: translateX(-50%) scale(1); }
            100% { opacity: 1; transform: translateX(-50%) scale(1.15); }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            padding: 2rem;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            color: var(--color-white);
            text-shadow: 0 2px 40px rgba(0, 0, 0, 0.4);
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: 1.25rem;
            color: var(--color-gray-light);
            max-width: 700px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white);
            padding: 0.9rem 2.8rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-glow);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 35px rgba(59, 130, 246, 0.7);
            color: var(--color-white);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-white);
            padding: 0.9rem 2.8rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1.05rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            cursor: pointer;
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
            color: var(--color-white);
        }
        .hero-stats {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 3rem;
            margin-top: 3.5rem;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-white);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: var(--color-gray-light);
            margin-top: 0.25rem;
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 1rem;
            }
            .btn-primary, .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                gap: 1.5rem;
                margin-top: 2.5rem;
            }
            .hero-stat-item .num {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.8rem;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-dark {
            background: var(--color-bg-dark);
        }
        .section-light {
            background: rgba(30, 58, 138, 0.15);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 1rem;
            color: var(--color-white);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-gray-light);
            text-align: center;
            max-width: 650px;
            margin: 0 auto 3.5rem;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section {
                --section-gap: 3rem;
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2.5rem;
            }
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            padding: 2rem;
        }
        .glass-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            border-color: rgba(59, 130, 246, 0.3);
        }
        .glass-card .card-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            display: inline-block;
        }
        .glass-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: var(--color-white);
        }
        .glass-card p {
            color: var(--color-gray-light);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* ===== Feature Grid (2-column zigzag) ===== */
        .feature-zigzag {
            display: flex;
            flex-direction: column;
            gap: 3rem;
        }
        .feature-row {
            display: flex;
            align-items: center;
            gap: 3rem;
        }
        .feature-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-row .feature-text {
            flex: 1;
        }
        .feature-row .feature-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            color: var(--color-white);
        }
        .feature-row .feature-text p {
            color: var(--color-gray-light);
            line-height: 1.8;
            font-size: 1rem;
        }
        .feature-row .feature-text .feature-tag {
            display: inline-block;
            background: rgba(59, 130, 246, 0.2);
            color: var(--color-accent);
            padding: 0.2rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
        .feature-row .feature-media {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .feature-row .feature-media img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-row .feature-media:hover img {
            transform: scale(1.03);
        }
        @media (max-width: 768px) {
            .feature-row, .feature-row.reverse {
                flex-direction: column;
                gap: 1.5rem;
            }
            .feature-row .feature-text h3 {
                font-size: 1.3rem;
            }
            .feature-row .feature-media img {
                height: 200px;
            }
        }

        /* ===== Scene Cards Grid ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .scene-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: var(--glass-border);
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
            cursor: pointer;
        }
        .scene-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .scene-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .scene-card:hover img {
            transform: scale(1.05);
        }
        .scene-card .scene-info {
            padding: 1.5rem;
        }
        .scene-card .scene-info h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--color-white);
        }
        .scene-card .scene-info p {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .scene-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Case / Testimonial ===== */
        .case-scroll {
            display: flex;
            gap: 1.5rem;
            overflow-x: auto;
            padding-bottom: 1rem;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .case-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .case-scroll::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 4px;
        }
        .case-scroll::-webkit-scrollbar-thumb {
            background: var(--color-accent);
            border-radius: 4px;
        }
        .case-card {
            flex: 0 0 320px;
            scroll-snap-align: start;
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.8rem;
            transition: transform var(--transition-base), border-color var(--transition-base);
        }
        .case-card:hover {
            transform: translateY(-4px);
            border-color: rgba(59, 130, 246, 0.3);
        }
        .case-card .case-logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--color-cyan);
            margin-bottom: 1rem;
        }
        .case-card .case-text {
            color: var(--color-gray-light);
            font-size: 0.95rem;
            line-height: 1.7;
            font-style: italic;
        }
        .case-card .case-author {
            margin-top: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .case-card .case-author .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-white);
        }
        .case-card .case-author .name {
            font-weight: 600;
            color: var(--color-white);
            font-size: 0.9rem;
        }
        .case-card .case-author .role {
            color: var(--color-gray-light);
            font-size: 0.8rem;
        }
        @media (max-width: 768px) {
            .case-card {
                flex: 0 0 280px;
                padding: 1.4rem;
            }
        }

        /* ===== Pricing / Plans ===== */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .pricing-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2.5rem 2rem;
            text-align: center;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            position: relative;
        }
        .pricing-card.featured {
            border-color: var(--color-accent);
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.2);
        }
        .pricing-card.featured::before {
            content: '推荐';
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white);
            padding: 0.25rem 1.5rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.05em;
        }
        .pricing-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            border-color: rgba(59, 130, 246, 0.3);
        }
        .pricing-card .plan-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 0.5rem;
        }
        .pricing-card .plan-price {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 0.25rem;
        }
        .pricing-card .plan-price span {
            font-size: 1rem;
            font-weight: 400;
            color: var(--color-gray-light);
        }
        .pricing-card .plan-desc {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
        }
        .pricing-card .plan-features {
            text-align: left;
            margin-bottom: 2rem;
        }
        .pricing-card .plan-features li {
            padding: 0.5rem 0;
            color: var(--color-gray-light);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .pricing-card .plan-features li i {
            color: var(--color-cyan);
            font-size: 0.8rem;
            width: 18px;
            text-align: center;
        }
        .pricing-card .btn-plan {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-white);
            padding: 0.75rem 2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all var(--transition-base);
            display: inline-block;
            width: 100%;
            cursor: pointer;
        }
        .pricing-card .btn-plan:hover {
            background: var(--color-accent);
            border-color: var(--color-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: var(--color-white);
        }
        .pricing-card.featured .btn-plan {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            border: none;
            box-shadow: var(--shadow-glow);
        }
        .pricing-card.featured .btn-plan:hover {
            box-shadow: 0 0 35px rgba(59, 130, 246, 0.7);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .pricing-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .pricing-card {
                padding: 2rem 1.5rem;
            }
        }

        /* ===== CMS / News List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        .news-card {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            border-color: rgba(59, 130, 246, 0.25);
        }
        .news-card .news-tag {
            display: inline-block;
            background: rgba(6, 182, 212, 0.2);
            color: var(--color-cyan);
            padding: 0.15rem 0.8rem;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
        }
        .news-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 0.5rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-summary {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.8rem;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-gray-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 0.8rem;
        }
        .news-card .news-meta .news-date {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--color-gray-light);
            background: var(--glass-bg);
            border-radius: var(--radius-card);
            border: 1px dashed rgba(255, 255, 255, 0.1);
        }
        .news-empty i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0.5;
        }
        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: var(--glass-blur);
            -webkit-backdrop-filter: var(--glass-blur);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(59, 130, 246, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            background: transparent;
            color: var(--color-white);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            border: none;
            text-align: left;
            transition: color var(--transition-base);
            gap: 1rem;
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-arrow {
            transition: transform var(--transition-base);
            font-size: 0.8rem;
            color: var(--color-gray-light);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--color-gray-light);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem;
        }
        @media (max-width: 768px) {
            .faq-question {
                padding: 1rem 1.25rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1.25rem;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 1.25rem 1rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: radial-gradient(ellipse at center, #1e3a8a 0%, #0a192f 70%);
            padding: 5rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
            animation: ctaGlow 8s ease-in-out infinite alternate;
            pointer-events: none;
        }
        @keyframes ctaGlow {
            0% { transform: translate(0, 0); }
            100% { transform: translate(5%, 5%); }
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 1rem;
        }
        .cta-section p {
            color: var(--color-gray-light);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            font-size: 1.1rem;
            padding: 1rem 3rem;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 3rem 0;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 4rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-brand .site-logo {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            display: inline-block;
        }
        .footer-brand p {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 1.2rem;
        }
        .footer-col ul li {
            margin-bottom: 0.6rem;
        }
        .footer-col ul li a {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            transition: color var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
            margin-top: 1rem;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-gray-light);
            font-size: 1.1rem;
            transition: all var(--transition-base);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--color-gray-dark);
        }
        .footer-bottom a {
            color: var(--color-gray-dark);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fadeIn {
            animation: fadeIn 0.8s ease forwards;
        }
        .animate-fadeIn-delay-1 {
            animation: fadeIn 0.8s ease 0.2s forwards;
            opacity: 0;
        }
        .animate-fadeIn-delay-2 {
            animation: fadeIn 0.8s ease 0.4s forwards;
            opacity: 0;
        }
        .animate-fadeIn-delay-3 {
            animation: fadeIn 0.8s ease 0.6s forwards;
            opacity: 0;
        }

        /* ===== Misc ===== */
        .badge {
            display: inline-block;
            background: rgba(59, 130, 246, 0.15);
            color: var(--color-accent);
            padding: 0.2rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .text-gradient {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-cyan));
            border-radius: 3px;
            margin: 1rem auto 2rem;
        }
        .focus-ring:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

/* roulang page: article */
:root {
            --color-primary: #0a192f;
            --color-secondary: #1e3a8a;
            --color-accent: #3b82f6;
            --color-cyan: #06b6d4;
            --color-white: #ffffff;
            --color-gray-light: #94a3b8;
            --color-gray-dark: #1e293b;
            --color-bg-dark: #06102b;
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.1);
            --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --radius-card: 16px;
            --radius-sm: 8px;
            --radius-btn: 12px;
            --transition: 0.3s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1280px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-primary);
            color: var(--color-white);
            line-height: 1.6;
            min-height: 100vh;
        }

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

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

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

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 25, 47, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--glass-border);
            transition: background var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .site-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .site-logo span {
            color: var(--color-accent);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-list a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-gray-light);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--color-white);
            background: rgba(59, 130, 246, 0.15);
        }

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

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white) !important;
            padding: 0.5rem 1.25rem !important;
            border-radius: var(--radius-btn) !important;
            font-weight: 600 !important;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.7);
            transform: scale(1.02);
            background: linear-gradient(135deg, #2563eb, #0891b2);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.25rem;
        }

        @media (max-width: 1024px) {
            .nav-list {
                position: fixed;
                top: 72px;
                left: 0;
                width: 100%;
                background: rgba(10, 25, 47, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem 1rem;
                gap: 0.5rem;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                border-bottom: 1px solid var(--glass-border);
                pointer-events: none;
            }

            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-list a {
                width: 100%;
                text-align: center;
                padding: 0.75rem 1rem;
                font-size: 1.05rem;
            }

            .nav-toggle {
                display: block;
            }
        }

        /* ===== Article Hero / Banner ===== */
        .article-banner {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, #0a192f 0%, #1e3a8a 50%, #0a192f 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--glass-border);
        }

        .article-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 60%),
                radial-gradient(circle at 70% 80%, rgba(6, 182, 212, 0.06) 0%, transparent 50%);
            animation: ambientGlow 12s ease-in-out infinite alternate;
        }

        @keyframes ambientGlow {
            0% {
                transform: translate(0, 0) scale(1);
            }
            50% {
                transform: translate(2%, -2%) scale(1.05);
            }
            100% {
                transform: translate(-2%, 2%) scale(0.98);
            }
        }

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

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: var(--color-gray-light);
            margin-bottom: 1.5rem;
        }

        .breadcrumb a {
            color: var(--color-gray-light);
            transition: color var(--transition);
        }

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

        .breadcrumb .sep {
            color: var(--color-gray-dark);
        }

        .breadcrumb .current {
            color: var(--color-white);
            font-weight: 500;
        }

        .article-meta-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1.25rem;
            margin-top: 1rem;
            font-size: 0.9rem;
            color: var(--color-gray-light);
        }

        .article-meta-bar .meta-item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta-bar .meta-item i {
            color: var(--color-accent);
        }

        .article-category-badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: rgba(59, 130, 246, 0.2);
            border: 1px solid rgba(59, 130, 246, 0.3);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--color-cyan);
            font-weight: 500;
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 50px 0 80px;
            background: var(--color-primary);
        }

        .article-content-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }

        .article-body {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 2rem 1.8rem;
            backdrop-filter: blur(4px);
            box-shadow: var(--glass-shadow);
        }

        .article-body h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 0.75rem;
            color: var(--color-white);
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--color-white);
            border-left: 4px solid var(--color-accent);
            padding-left: 1rem;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
            color: var(--color-cyan);
        }

        .article-body p {
            font-size: 1rem;
            line-height: 1.9;
            margin-bottom: 1.25rem;
            color: rgba(255, 255, 255, 0.88);
        }

        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem 1.5rem;
            color: rgba(255, 255, 255, 0.85);
        }

        .article-body li {
            margin-bottom: 0.5rem;
            line-height: 1.7;
        }

        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }

        .article-body blockquote {
            border-left: 4px solid var(--color-cyan);
            background: rgba(6, 182, 212, 0.08);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: rgba(255, 255, 255, 0.9);
            font-style: italic;
        }

        .article-body blockquote p {
            margin-bottom: 0;
        }

        .article-body code {
            background: rgba(255, 255, 255, 0.08);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--color-cyan);
        }

        .article-body pre {
            background: rgba(0, 0, 0, 0.4);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-sm);
            padding: 1.25rem;
            overflow-x: auto;
            margin: 1.5rem 0;
        }

        .article-body pre code {
            background: none;
            padding: 0;
            color: inherit;
        }

        .article-body a {
            color: var(--color-accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-body a:hover {
            color: var(--color-cyan);
        }

        .article-body .wp-caption,
        .article-body .aligncenter {
            text-align: center;
        }

        /* ===== Article Footer / Related ===== */
        .article-footer-meta {
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--glass-border);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .article-tags .tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--color-gray-light);
            transition: all var(--transition);
        }

        .article-tags .tag:hover {
            background: rgba(59, 130, 246, 0.15);
            color: var(--color-accent);
            border-color: rgba(59, 130, 246, 0.3);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--color-gray-light);
            font-size: 0.9rem;
        }

        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--glass-border);
            color: var(--color-gray-light);
            transition: all var(--transition);
        }

        .article-share a:hover {
            background: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: linear-gradient(180deg, var(--color-primary) 0%, #0d1f3c 100%);
            border-top: 1px solid var(--glass-border);
        }

        .related-section .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 2.5rem;
            color: var(--color-white);
        }

        .related-section .section-title span {
            color: var(--color-accent);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(1, 1fr);
            gap: 1.5rem;
        }

        @media (min-width: 640px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .related-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--glass-shadow);
        }

        .related-card:hover {
            transform: translateY(-5px);
            border-color: rgba(59, 130, 246, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--glass-border);
        }

        .related-card .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
        }

        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: var(--color-white);
            line-height: 1.4;
        }

        .related-card .card-body .card-date {
            font-size: 0.8rem;
            color: var(--color-gray-light);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .related-card .card-body .card-date i {
            color: var(--color-accent);
        }

        .back-to-list {
            text-align: center;
            margin-top: 2.5rem;
        }

        .back-to-list a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.8rem;
            background: transparent;
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-btn);
            color: var(--color-gray-light);
            font-weight: 500;
            transition: all var(--transition);
        }

        .back-to-list a:hover {
            background: rgba(59, 130, 246, 0.1);
            border-color: var(--color-accent);
            color: var(--color-accent);
        }

        /* ===== Not Found State ===== */
        .not-found-box {
            text-align: center;
            padding: 4rem 2rem;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(4px);
        }

        .not-found-box .icon {
            font-size: 4rem;
            color: var(--color-gray-dark);
            margin-bottom: 1.5rem;
        }

        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--color-white);
        }

        .not-found-box p {
            color: var(--color-gray-light);
            margin-bottom: 1.5rem;
        }

        .not-found-box .btn-home {
            display: inline-block;
            padding: 0.6rem 2rem;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white);
            border-radius: var(--radius-btn);
            font-weight: 600;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
            transition: all var(--transition);
        }

        .not-found-box .btn-home:hover {
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            border-top: 1px solid var(--glass-border);
            padding: 50px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }
        }

        .footer-brand .site-logo {
            font-size: 1.4rem;
            display: inline-block;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 0.75rem;
            margin-top: 1.25rem;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--glass-border);
            color: var(--color-gray-light);
            font-size: 1.1rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            color: var(--color-white);
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 0.6rem;
        }

        .footer-col ul li a {
            color: var(--color-gray-light);
            font-size: 0.9rem;
            transition: all var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.75rem;
            padding: 1.5rem 0;
            text-align: center;
            font-size: 0.85rem;
            color: var(--color-gray-dark);
        }

        .footer-bottom a {
            color: var(--color-gray-dark);
            transition: color var(--transition);
        }

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

        @media (min-width: 640px) {
            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
            }
        }

        /* ===== Animation ===== */
        .animate-fadeIn {
            animation: fadeIn 0.8s ease forwards;
        }

        @keyframes fadeIn {
            0% {
                opacity: 0;
                transform: translateY(20px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 640px) {
            .article-banner {
                padding: 100px 0 40px;
            }

            .article-body {
                padding: 1.25rem 1rem;
            }

            .article-body h1 {
                font-size: 1.6rem;
            }

            .article-body h2 {
                font-size: 1.3rem;
            }

            .article-body h3 {
                font-size: 1.1rem;
            }

            .article-body p {
                font-size: 0.95rem;
            }

            .article-meta-bar {
                gap: 0.75rem;
                font-size: 0.8rem;
            }

            .related-section .section-title {
                font-size: 1.5rem;
            }

            .footer-grid {
                gap: 1.5rem;
            }
        }

        @media (min-width: 641px) and (max-width: 1024px) {
            .article-body {
                padding: 1.75rem 1.5rem;
            }

            .article-body h1 {
                font-size: 1.9rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-dark: #0a192f;
            --primary-blue: #1e3a8a;
            --accent-blue: #3b82f6;
            --cyan-glow: #06b6d4;
            --text-white: #ffffff;
            --text-light: #94a3b8;
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.1);
            --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --radius-card: 16px;
            --radius-sm: 6px;
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1280px;
            --section-gap: 6rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--primary-dark);
            color: var(--text-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--accent-blue);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-blue);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (min-width:768px) {
            .container {
                padding: 0 2rem;
            }
        }
        @media (min-width:1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: linear-gradient(180deg, rgba(10, 25, 47, 0.92) 0%, rgba(10, 25, 47, 0.6) 80%, transparent 100%);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.4s ease;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .site-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, #ffffff, #94a3b8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }
        .site-logo:hover {
            opacity: 0.85;
            color: var(--text-white);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 2rem;
        }
        .nav-list a {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            padding: 0.4rem 0;
            position: relative;
            transition: color 0.3s ease;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-blue);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-list a:hover {
            color: #fff;
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a.active {
            color: #fff;
        }
        .nav-list a.active::after {
            width: 100%;
            background: var(--cyan-glow);
            box-shadow: 0 0 8px var(--cyan-glow);
        }
        .nav-list .nav-cta-btn {
            background: linear-gradient(135deg, var(--accent-blue), var(--cyan-glow));
            color: #fff !important;
            padding: 0.5rem 1.4rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 0 18px rgba(59, 130, 246, 0.4);
            transition: all 0.3s ease;
            border: none;
        }
        .nav-list .nav-cta-btn::after {
            display: none;
        }
        .nav-list .nav-cta-btn:hover {
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.7);
            transform: translateY(-2px);
            color: #fff !important;
        }
        .nav-list .nav-cta-btn i {
            margin-right: 6px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .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(6px, -6px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 25, 47, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2rem;
            z-index: 999;
            padding: 2rem;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.4rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            transition: color 0.3s;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--accent-blue);
        }
        .mobile-menu .nav-cta-btn {
            background: linear-gradient(135deg, var(--accent-blue), var(--cyan-glow));
            color: #fff !important;
            padding: 0.8rem 2.4rem;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
        }

        @media (max-width:768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8rem 0 4rem;
            background: radial-gradient(ellipse at 30% 40%, #0f2b5e 0%, #0a192f 55%, #060e1f 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center 30% / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -15%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            animation: heroGlow 8s ease-in-out infinite alternate;
        }
        @keyframes heroGlow {
            0% {
                transform: translate(0, 0) scale(1);
                opacity: 0.4;
            }
            100% {
                transform: translate(-60px, 40px) scale(1.3);
                opacity: 0.7;
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            padding: 0 1.5rem;
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #ffffff 40%, #94b8ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content .hero-sub {
            font-size: 1.2rem;
            color: var(--text-light);
            margin-bottom: 2.2rem;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--accent-blue), var(--cyan-glow));
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.85rem 2.4rem;
            border-radius: 40px;
            box-shadow: 0 0 24px rgba(59, 130, 246, 0.45);
            transition: all 0.35s ease;
            border: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(59, 130, 246, 0.75);
            transform: translateY(-3px);
            color: #fff;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-weight: 500;
            font-size: 1.05rem;
            padding: 0.85rem 2.4rem;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(6px);
            transition: all 0.35s ease;
        }
        .btn-outline:hover {
            border-color: var(--accent-blue);
            background: rgba(59, 130, 246, 0.12);
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
            transform: translateY(-3px);
            color: #fff;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem 3.5rem;
            justify-content: center;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
        }
        .hero-stats .stat-num .accent {
            color: var(--cyan-glow);
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: 0.2rem;
        }

        @media (max-width:768px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem 2rem;
            }
            .hero-stats .stat-num {
                font-size: 1.5rem;
            }
        }
        @media (max-width:520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.8rem;
            color: #fff;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 3rem;
            line-height: 1.7;
        }
        @media (max-width:768px) {
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--glass-shadow);
            transition: all 0.4s ease;
            overflow: hidden;
        }
        .glass-card:hover {
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }

        /* ===== Features / 优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }
        .feature-card {
            padding: 2.5rem 2rem;
            text-align: left;
            display: flex;
            flex-direction: column;
        }
        .feature-card .feat-icon {
            font-size: 2.2rem;
            margin-bottom: 1rem;
            color: var(--cyan-glow);
        }
        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
            color: #fff;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
        }
        @media (max-width:768px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .feature-card {
                padding: 1.8rem 1.5rem;
            }
        }

        /* ===== Game Categories / 游戏分类 ===== */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .game-card {
            padding: 0;
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--glass-shadow);
            transition: all 0.4s ease;
            overflow: hidden;
        }
        .game-card:hover {
            transform: translateY(-6px);
            border-color: rgba(6, 182, 212, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .game-card .game-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .game-card .game-body {
            padding: 1.5rem;
        }
        .game-card .game-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
            color: #fff;
        }
        .game-card .game-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 0.8rem;
        }
        .game-card .game-tag {
            display: inline-block;
            font-size: 0.75rem;
            padding: 0.25rem 0.8rem;
            border-radius: 20px;
            background: rgba(59, 130, 246, 0.2);
            color: var(--accent-blue);
            border: 1px solid rgba(59, 130, 246, 0.2);
            margin-right: 0.4rem;
            margin-bottom: 0.3rem;
        }
        .game-card .game-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 0.8rem;
            padding-top: 0.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .game-card .game-footer .rating {
            color: #fbbf24;
            font-size: 0.85rem;
        }
        .game-card .game-footer .dl-btn {
            font-size: 0.85rem;
            color: var(--cyan-glow);
            font-weight: 500;
            transition: all 0.3s;
        }
        .game-card .game-footer .dl-btn:hover {
            color: #fff;
            text-shadow: 0 0 8px var(--cyan-glow);
        }

        @media (max-width:1024px) {
            .game-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width:640px) {
            .game-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }

        /* ===== Download Flow ===== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }
        .flow-step {
            padding: 2rem 1.5rem;
            text-align: center;
            background: var(--glass-bg);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            transition: all 0.4s ease;
            position: relative;
        }
        .flow-step:hover {
            border-color: rgba(59, 130, 246, 0.3);
            transform: translateY(-4px);
        }
        .flow-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--cyan-glow));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 1rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
        }
        .flow-step h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
            color: #fff;
        }
        .flow-step p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        @media (max-width:1024px) {
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width:520px) {
            .flow-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        /* ===== Scenarios ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .scenario-card {
            padding: 2rem 1.8rem;
            text-align: center;
            background: var(--glass-bg);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            transition: all 0.4s ease;
        }
        .scenario-card:hover {
            transform: translateY(-5px);
            border-color: rgba(6, 182, 212, 0.25);
        }
        .scenario-card .scen-icon {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            color: var(--cyan-glow);
        }
        .scenario-card h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #fff;
        }
        .scenario-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        @media (max-width:768px) {
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
        }
        @media (min-width:769px) and (max-width:1024px) {
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid var(--glass-border);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(59, 130, 246, 0.2);
        }
        .faq-question {
            width: 100%;
            padding: 1.3rem 1.6rem;
            font-size: 1rem;
            font-weight: 500;
            color: #fff;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            cursor: pointer;
            transition: background 0.3s;
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--accent-blue);
            transition: transform 0.4s ease;
            flex-shrink: 0;
            margin-left: 1rem;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.3s ease;
            padding: 0 1.6rem;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.6rem 1.4rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(30, 58, 138, 0.4), rgba(6, 182, 212, 0.1));
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            padding: 5rem 0;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 540px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .cta-section .btn-primary {
            font-size: 1.1rem;
            padding: 1rem 3rem;
        }
        @media (max-width:768px) {
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-primary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060e1f;
            padding: 4rem 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr;
            gap: 3rem 2rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-brand .site-logo {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            display: inline-block;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-top: 0.6rem;
        }
        .footer-social {
            display: flex;
            gap: 1rem;
            margin-top: 1.2rem;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            font-size: 1.2rem;
            transition: all 0.3s ease;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-social a:hover {
            background: var(--accent-blue);
            color: #fff;
            border-color: var(--accent-blue);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1.2rem;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.7rem;
        }
        .footer-col ul a {
            font-size: 0.9rem;
            color: var(--text-light);
            transition: color 0.3s;
        }
        .footer-col ul a:hover {
            color: var(--accent-blue);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 1.6rem 0;
            gap: 0.8rem;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
            transition: color 0.3s;
        }
        .footer-bottom a:hover {
            color: var(--accent-blue);
        }
        .footer-bottom span {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.2rem;
        }

        @media (max-width:768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeIn {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeIn 0.8s ease forwards;
        }
        .animate-in-d1 {
            animation-delay: 0.1s;
        }
        .animate-in-d2 {
            animation-delay: 0.2s;
        }
        .animate-in-d3 {
            animation-delay: 0.3s;
        }

        /* ===== Misc ===== */
        .badge-glow {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 30px;
            background: rgba(6, 182, 212, 0.12);
            border: 1px solid rgba(6, 182, 212, 0.2);
            color: var(--cyan-glow);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.3px;
        }
        .text-gradient {
            background: linear-gradient(135deg, #fff, #94b8ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--cyan-glow));
            border-radius: 4px;
            margin: 0.6rem auto 0;
        }

        /* 移动端断点微调 */
        @media (max-width:520px) {
            .site-header .container {
                height: 60px;
            }
            .site-logo {
                font-size: 1.1rem;
            }
            .hero-section {
                min-height: 90vh;
                padding: 6rem 0 3rem;
            }
            .btn-primary,
            .btn-outline {
                font-size: 0.95rem;
                padding: 0.7rem 1.8rem;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #0a192f;
            --color-secondary: #1e3a8a;
            --color-accent: #3b82f6;
            --color-cyan: #06b6d4;
            --color-white: #ffffff;
            --color-light-blue: #94a3b8;
            --color-bg-dark: #06102b;
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-border: rgba(255, 255, 255, 0.1);
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-small: 6px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1280px;
            --spacing-section: 6rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            font-size: 1rem;
            line-height: 1.6;
            background-color: var(--color-primary);
            color: var(--color-white);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--color-cyan);
        }

        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 4px;
            border-radius: var(--radius-small);
        }

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

        button,
        input,
        textarea {
            font-family: var(--font-stack);
            transition: all 0.3s ease;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: linear-gradient(180deg, rgba(10, 25, 47, 0.95) 0%, rgba(10, 25, 47, 0.7) 70%, transparent 100%);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s ease;
        }

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

        .site-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-white);
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, #ffffff, #94a3b8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: opacity 0.3s ease;
            flex-shrink: 0;
        }

        .site-logo:hover {
            opacity: 0.85;
            color: var(--color-white);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }

        .nav-list a {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-light-blue);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .nav-list a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-list a.active {
            color: var(--color-white);
            background: rgba(59, 130, 246, 0.2);
            box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.3);
        }

        .nav-list a.nav-cta-btn {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white);
            font-weight: 600;
            padding: 0.5rem 1.6rem;
            border-radius: var(--radius-btn);
            box-shadow: var(--shadow-glow);
            margin-left: 0.5rem;
        }

        .nav-list a.nav-cta-btn:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.7);
            background: linear-gradient(135deg, #3b82f6, #06b6d4);
        }

        .nav-list a.nav-cta-btn i {
            margin-right: 0.4rem;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 0.5rem;
            background: none;
            border: none;
        }

        .hamburger span {
            display: block;
            width: 28px;
            height: 2.5px;
            background: var(--color-white);
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        .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(6px, -6px);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(10, 25, 47, 0.97);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            padding: 2rem;
        }

        .mobile-nav-overlay.open {
            display: flex;
        }

        .mobile-nav-overlay a {
            font-size: 1.6rem;
            color: var(--color-light-blue);
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 0.5rem 0;
        }

        .mobile-nav-overlay a:hover,
        .mobile-nav-overlay a.active {
            color: var(--color-white);
        }

        .mobile-nav-overlay .nav-cta-btn-mobile {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white) !important;
            padding: 0.8rem 2.4rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            box-shadow: var(--shadow-glow);
            margin-top: 1rem;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8rem 0 4rem;
            background: linear-gradient(135deg, #0a192f 0%, #1e3a8a 50%, #0a192f 100%);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, var(--color-primary) 0%, transparent 100%);
        }

        .hero-glow {
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.2) 0%, transparent 70%);
            top: 10%;
            right: 5%;
            animation: pulseGlow 6s ease-in-out infinite alternate;
            pointer-events: none;
        }

        .hero-glow-2 {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
            bottom: 5%;
            left: 10%;
            animation: pulseGlow 8s ease-in-out infinite alternate-reverse;
            pointer-events: none;
        }

        @keyframes pulseGlow {
            0% {
                transform: scale(0.8) translate(0, 0);
                opacity: 0.5;
            }
            100% {
                transform: scale(1.3) translate(30px, -30px);
                opacity: 1;
            }
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
        }

        .page-hero-content h1 {
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero-content .hero-sub {
            font-size: 1.25rem;
            color: var(--color-light-blue);
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .page-hero-content .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.3);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--color-cyan);
            margin-bottom: 1.5rem;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white);
            font-weight: 600;
            padding: 0.9rem 2.4rem;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
            font-size: 1rem;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 35px rgba(59, 130, 246, 0.7);
            color: var(--color-white);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: transparent;
            color: var(--color-white);
            font-weight: 500;
            padding: 0.9rem 2.4rem;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.2);
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.4);
            color: var(--color-white);
        }

        /* ===== Sections ===== */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            background: linear-gradient(135deg, #ffffff, #94a3b8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-title p {
            color: var(--color-light-blue);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .section-title .title-tag {
            display: inline-block;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.25);
            padding: 0.25rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--color-cyan);
            margin-bottom: 0.75rem;
            letter-spacing: 1px;
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2rem;
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }

        .glass-card .card-icon {
            font-size: 2.2rem;
            margin-bottom: 1rem;
            color: var(--color-cyan);
        }

        .glass-card h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
        }

        .glass-card p {
            color: var(--color-light-blue);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Grid layouts ===== */
        .grid-2col {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

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

        .grid-4col {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        /* ===== Feature Zigzag ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            margin-bottom: 4rem;
        }

        .feature-row.reverse {
            direction: rtl;
        }

        .feature-row.reverse .feature-text {
            direction: ltr;
        }

        .feature-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .feature-text p {
            color: var(--color-light-blue);
            line-height: 1.8;
            margin-bottom: 1.2rem;
        }

        .feature-text .feature-list {
            list-style: none;
            padding: 0;
        }

        .feature-text .feature-list li {
            padding: 0.5rem 0;
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            color: var(--color-light-blue);
        }

        .feature-text .feature-list li i {
            color: var(--color-cyan);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        .feature-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--glass-border);
        }

        .feature-image img {
            width: 100%;
            height: 350px;
            object-fit: cover;
            display: block;
        }

        /* ===== Steps / Timeline ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }

        .step-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: all 0.3s ease;
            position: relative;
        }

        .step-card:hover {
            transform: translateY(-5px);
            border-color: rgba(59, 130, 246, 0.3);
        }

        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
        }

        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .step-card p {
            color: var(--color-light-blue);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(59, 130, 246, 0.25);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 1.5rem;
            cursor: pointer;
            font-weight: 500;
            font-size: 1.05rem;
            background: none;
            border: none;
            color: var(--color-white);
            width: 100%;
            text-align: left;
            transition: background 0.3s ease;
            gap: 1rem;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .faq-question .faq-arrow {
            font-size: 1.1rem;
            color: var(--color-accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--color-light-blue);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0a192f 0%, #1e3a8a 50%, #0a192f 100%);
            border-top: 1px solid rgba(59, 130, 246, 0.15);
            border-bottom: 1px solid rgba(59, 130, 246, 0.15);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 4rem 0;
        }

        .cta-content h2 {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .cta-content p {
            color: var(--color-light-blue);
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1.1rem;
            line-height: 1.7;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .stat-card {
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            text-align: center;
        }

        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-card .stat-label {
            color: var(--color-light-blue);
            font-size: 0.95rem;
            margin-top: 0.3rem;
        }

        /* ===== Tags ===== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: center;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid rgba(59, 130, 246, 0.2);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--color-light-blue);
            transition: all 0.3s ease;
        }

        .tag:hover {
            background: rgba(59, 130, 246, 0.2);
            border-color: rgba(59, 130, 246, 0.4);
            color: var(--color-white);
            transform: translateY(-2px);
        }

        .tag i {
            color: var(--color-cyan);
            font-size: 0.8rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 4rem 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 3rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .site-logo {
            font-size: 1.4rem;
            display: inline-block;
            margin-bottom: 0.8rem;
        }

        .footer-brand p {
            color: var(--color-light-blue);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 1rem;
            margin-top: 1.2rem;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-light-blue);
            font-size: 1.1rem;
            transition: all 0.3s ease;
        }

        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-white);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            color: var(--color-white);
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 0.6rem;
        }

        .footer-col ul li a {
            color: var(--color-light-blue);
            font-size: 0.9rem;
            transition: color 0.3s ease;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: var(--color-light-blue);
        }

        .footer-bottom a {
            color: var(--color-light-blue);
            margin: 0 0.3rem;
        }

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

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fadeIn {
            animation: fadeInUp 0.6s ease forwards;
        }

        .animate-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-delay-3 {
            animation-delay: 0.3s;
        }
        .animate-delay-4 {
            animation-delay: 0.4s;
        }
        .animate-delay-5 {
            animation-delay: 0.5s;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 4rem;
            }

            .grid-4col {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

            .page-hero-content h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .page-hero-content h1 {
                font-size: 2rem;
            }

            .page-hero-content .hero-sub {
                font-size: 1.05rem;
            }

            .grid-2col,
            .grid-3col,
            .feature-row {
                grid-template-columns: 1fr;
            }

            .feature-row.reverse {
                direction: ltr;
            }

            .feature-image img {
                height: 220px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }

            .section-title h2 {
                font-size: 1.8rem;
            }

            .cta-content h2 {
                font-size: 1.8rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .glass-card {
                padding: 1.5rem;
            }

            .site-logo {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 2.5rem;
            }

            .page-hero {
                min-height: 50vh;
                padding: 6rem 0 2.5rem;
            }

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

            .page-hero-content .hero-sub {
                font-size: 0.95rem;
            }

            .hero-cta-group {
                flex-direction: column;
                align-items: center;
            }

            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }

            .stat-card .stat-number {
                font-size: 1.8rem;
            }

            .section-title h2 {
                font-size: 1.5rem;
            }

            .faq-question {
                font-size: 0.95rem;
                padding: 1rem 1.2rem;
            }

            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #0a192f;
            --color-secondary: #1e3a8a;
            --color-accent: #3b82f6;
            --color-cyan: #06b6d4;
            --color-white: #ffffff;
            --color-text-light: #94a3b8;
            --color-text-muted: #64748b;
            --color-border: rgba(255, 255, 255, 0.1);
            --glass-bg: rgba(255, 255, 255, 0.05);
            --glass-bg-hover: rgba(255, 255, 255, 0.1);
            --glass-border: 1px solid rgba(255, 255, 255, 0.1);
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-sm: 6px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);
            --transition: 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1280px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--color-primary);
            color: var(--color-white);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: all var(--transition);
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: linear-gradient(180deg, rgba(10, 25, 47, 0.95) 0%, rgba(10, 25, 47, 0.7) 100%);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding: 0 1.5rem;
            max-width: var(--max-width);
            margin: 0 auto;
        }

        .site-logo {
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--color-white), var(--color-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .site-logo:hover {
            opacity: 0.85;
            -webkit-text-fill-color: transparent;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .nav-list a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--color-white);
            background: var(--glass-bg);
        }
        .nav-list a.active {
            color: var(--color-white);
            background: rgba(59, 130, 246, 0.15);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan)) !important;
            color: var(--color-white) !important;
            padding: 0.55rem 1.5rem !important;
            border-radius: var(--radius-btn) !important;
            font-weight: 600 !important;
            box-shadow: var(--shadow-glow);
            margin-left: 0.5rem;
            transition: all var(--transition) !important;
        }
        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(59, 130, 246, 0.7) !important;
            opacity: 0.95;
        }
        .nav-cta-btn i {
            margin-right: 0.4rem;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: all 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 menu overlay */
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            width: 100%;
            height: calc(100vh - 72px);
            background: rgba(10, 25, 47, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            padding: 2rem;
        }
        .mobile-overlay.open {
            display: flex;
        }
        .mobile-overlay a {
            font-size: 1.4rem;
            font-weight: 500;
            color: var(--color-text-light);
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-overlay a:hover {
            color: var(--color-white);
            background: var(--glass-bg);
        }
        .mobile-overlay a.active {
            color: var(--color-white);
            background: rgba(59, 130, 246, 0.15);
        }
        .mobile-overlay .nav-cta-btn {
            font-size: 1.2rem;
            padding: 0.85rem 2.5rem !important;
            margin-top: 0.5rem;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 8rem 1.5rem 4rem;
            background: radial-gradient(ellipse at center, #1e3a8a 0%, #0a192f 70%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            mix-blend-mode: overlay;
        }
        .hero-glow {
            position: absolute;
            top: 20%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
        }
        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1.2rem;
            background: linear-gradient(135deg, #ffffff, #94a3b8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.25rem;
            color: var(--color-text-light);
            margin-bottom: 2.5rem;
            line-height: 1.7;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 2.4rem;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            color: var(--color-white);
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: var(--radius-btn);
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 35px rgba(59, 130, 246, 0.7);
            color: var(--color-white);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--color-cyan);
            outline-offset: 3px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 2.4rem;
            background: var(--glass-bg);
            color: var(--color-white);
            font-size: 1.05rem;
            font-weight: 500;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
        }
        .btn-secondary:hover {
            background: var(--glass-bg-hover);
            border-color: rgba(255, 255, 255, 0.25);
            color: var(--color-white);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-cyan);
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: 0.2rem;
        }

        /* ===== Section ===== */
        .section {
            padding: 5rem 1.5rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .badge {
            display: inline-block;
            padding: 0.3rem 1rem;
            background: rgba(59, 130, 246, 0.15);
            color: var(--color-accent);
            font-size: 0.85rem;
            font-weight: 500;
            border-radius: 20px;
            margin-bottom: 0.75rem;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
            padding: 2rem 1.8rem;
            transition: all var(--transition);
        }
        .glass-card:hover {
            transform: translateY(-6px);
            background: var(--glass-bg-hover);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .glass-card .icon-wrap {
            font-size: 2.2rem;
            color: var(--color-cyan);
            margin-bottom: 1rem;
            display: inline-block;
            background: rgba(6, 182, 212, 0.1);
            padding: 0.6rem;
            border-radius: var(--radius-sm);
        }
        .glass-card h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
        }
        .glass-card p {
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.8rem;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        /* ===== Feature Block ===== */
        .feature-block {
            display: flex;
            align-items: center;
            gap: 3rem;
            padding: 3rem 0;
        }
        .feature-block.reverse {
            flex-direction: row-reverse;
        }
        .feature-block .text-col {
            flex: 1;
        }
        .feature-block .img-col {
            flex: 1;
        }
        .feature-block .img-col img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            object-fit: cover;
            width: 100%;
            height: 340px;
        }
        .feature-block h3 {
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
        }
        .feature-block p {
            color: var(--color-text-light);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 1.2rem;
        }
        .feature-tag {
            display: inline-block;
            padding: 0.25rem 0.8rem;
            background: rgba(6, 182, 212, 0.12);
            color: var(--color-cyan);
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: 20px;
            margin-bottom: 0.6rem;
        }

        /* ===== Scene Card ===== */
        .scene-card {
            border-radius: var(--radius-card);
            overflow: hidden;
            background: var(--glass-bg);
            border: var(--glass-border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .scene-card:hover {
            transform: translateY(-5px);
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
        }
        .scene-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .scene-card .card-body {
            padding: 1.5rem 1.5rem 1.8rem;
        }
        .scene-card .card-body h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
        }
        .scene-card .card-body p {
            color: var(--color-text-light);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ===== Data Card ===== */
        .data-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
        }
        .data-card:hover {
            background: var(--glass-bg-hover);
            transform: translateY(-3px);
        }
        .data-card .num {
            font-size: 2.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .data-card .label {
            color: var(--color-text-light);
            font-size: 0.95rem;
            margin-top: 0.3rem;
        }

        /* ===== Activity Card ===== */
        .activity-card {
            display: flex;
            gap: 1.5rem;
            padding: 1.5rem;
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
            align-items: center;
        }
        .activity-card:hover {
            background: var(--glass-bg-hover);
            transform: translateX(4px);
        }
        .activity-card .act-icon {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(59, 130, 246, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--color-accent);
        }
        .activity-card .act-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .activity-card .act-info p {
            color: var(--color-text-light);
            font-size: 0.9rem;
        }
        .activity-card .act-badge {
            flex-shrink: 0;
            padding: 0.25rem 0.8rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(6, 182, 212, 0.15);
            color: var(--color-cyan);
            border: 1px solid rgba(6, 182, 212, 0.2);
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--glass-bg);
            border: var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            background: var(--glass-bg-hover);
            transform: translateY(-4px);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-accent), var(--color-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 1rem;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
        }
        .step-item h4 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .step-item p {
            color: var(--color-text-light);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            border-radius: var(--radius-card);
            background: var(--glass-bg);
            border: var(--glass-border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            background: var(--glass-bg-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.5rem;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-white);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            transition: all var(--transition);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform var(--transition);
            color: var(--color-accent);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--color-text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 5rem 1.5rem;
            background: radial-gradient(ellipse at center, rgba(30, 58, 138, 0.6) 0%, transparent 70%);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            color: var(--color-text-light);
            font-size: 1.1rem;
            max-width: 550px;
            margin: 0 auto 2rem;
        }
        .cta-section .btn-primary {
            font-size: 1.1rem;
            padding: 1rem 2.8rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #06102b;
            padding: 4rem 1.5rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            max-width: var(--max-width);
            margin: 0 auto;
            padding-bottom: 2.5rem;
        }
        .footer-brand .site-logo {
            font-size: 1.4rem;
            display: inline-block;
            margin-bottom: 0.8rem;
        }
        .footer-brand p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
            margin-top: 1.2rem;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-light);
            font-size: 1.1rem;
            transition: all var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-white);
            border-color: var(--color-accent);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--color-white);
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 1.5rem 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            max-width: var(--max-width);
            margin: 0 auto;
            font-size: 0.85rem;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        .footer-bottom span {
            display: inline-flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            align-items: center;
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in {
            animation: fadeInUp 0.8s ease forwards;
        }
        .animate-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-delay-3 {
            animation-delay: 0.3s;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-secondary);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-content h1 {
                font-size: 2.8rem;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                font-size: 1.05rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stat-item .num {
                font-size: 1.6rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .grid-3 {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .feature-block {
                flex-direction: column;
                gap: 1.5rem;
                padding: 2rem 0;
            }
            .feature-block.reverse {
                flex-direction: column;
            }
            .feature-block .img-col img {
                height: 220px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.5rem;
                text-align: center;
            }
            .activity-card {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .section {
                padding: 3rem 1rem;
            }
            .hero-section {
                padding: 6rem 1rem 3rem;
                min-height: auto;
            }
            .header-inner {
                height: 64px;
                padding: 0 1rem;
            }
            .site-logo {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
                padding: 0.85rem 1.5rem;
                font-size: 0.95rem;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .glass-card {
                padding: 1.5rem 1.2rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 1rem;
            }
            .data-card .num {
                font-size: 2rem;
            }
            .step-item {
                padding: 1.5rem 1rem;
            }
        }