/* roulang page: index */
:root {
            --color-bg: #0b0d12;
            --color-surface: #141722;
            --color-surface-2: #1a1f2e;
            --color-primary: #7c3aed;
            --color-accent: #05e0c9;
            --color-cta: #ff6b35;
            --color-text: #edeff5;
            --color-text-muted: #9aa2b8;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-hover: rgba(5, 224, 201, 0.45);
            --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #05e0c9 100%);
            --gradient-cta: linear-gradient(135deg, #ff6b35 0%, #f94d7c 100%);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.5);
            --shadow-nav: 0 8px 28px rgba(0, 0, 0, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --section-padding: 96px;
            --section-padding-sm: 56px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        input,
        textarea,
        select {
            font-family: inherit;
        }

        ::selection {
            background: rgba(124, 58, 237, 0.55);
            color: #fff;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Section 通用 */
        .section-block {
            padding: var(--section-padding) 0;
            position: relative;
        }

        .section-block.section-alt {
            background-color: var(--color-surface);
        }

        .section-block.section-dark {
            background-color: var(--color-bg);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 16px;
        }

        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(24px, 3.5vw, 34px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--color-text);
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 40px;
        }

        /* Navigation */
        .navbar-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 16px 0;
            background: rgba(20, 22, 30, 0.35);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-base), padding var(--transition-base);
        }

        .navbar-glass.scrolled {
            background: rgba(11, 13, 18, 0.98);
            padding: 10px 0;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }

        .navbar-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition-fast);
        }

        .navbar-brand:hover {
            color: var(--color-accent);
        }

        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }

        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            margin: 0 2px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            position: relative;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .navbar-nav .nav-link.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.12);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--gradient-brand);
        }

        .nav-cta-btn {
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            border: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 6px 18px rgba(255, 107, 53, 0.35);
        }

        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 10px 26px rgba(255, 107, 53, 0.45);
            filter: brightness(1.08);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 10px;
            padding: 6px 10px;
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.35);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 13, 18, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-radius: var(--radius-md);
                padding: 18px;
                margin-top: 12px;
                border: 1px solid var(--color-border);
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-cta-btn {
                display: inline-block;
                margin-top: 10px;
            }
        }

        /* Hero */
        .hero-section {
            min-height: 92vh;
            display: flex;
            align-items: center;
            position: relative;
            padding: 120px 0 80px;
            background-image: url('/assets/images/53eed13bf409e4ac.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            isolation: isolate;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 13, 18, 0.6) 0%, rgba(11, 13, 18, 0.85) 55%, rgba(11, 13, 18, 0.95) 100%), linear-gradient(115deg, rgba(124, 58, 237, 0.28) 0%, rgba(5, 224, 201, 0.1) 100%);
            z-index: -1;
        }

        .hero-badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .hero-badge .badge-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--color-accent);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }

        .hero-title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 900;
            line-height: 1.22;
            letter-spacing: -0.025em;
            color: #fff;
            margin-bottom: 24px;
        }

        .hero-title .highlight {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            line-height: 1.95;
            margin-bottom: 32px;
        }

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

        .btn-primary-gradient {
            padding: 14px 30px;
            border-radius: var(--radius-pill);
            background: var(--gradient-brand);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            border: none;
            transition: all var(--transition-fast);
            box-shadow: 0 8px 24px rgba(124, 58, 237, 0.4);
        }

        .btn-primary-gradient:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(124, 58, 237, 0.5);
            filter: brightness(1.1);
        }

        .btn-outline-glass {
            padding: 14px 28px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition-fast);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .btn-outline-glass:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.35);
            color: #fff;
            transform: translateY(-1px);
        }

        /* 数据徽章栏 */
        .stats-badge-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            padding: 20px 0;
        }

        .stat-pill {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            font-size: 14px;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }

        .stat-pill:hover {
            border-color: var(--color-border-hover);
            background: rgba(255, 255, 255, 0.1);
        }

        .stat-pill .stat-value {
            font-weight: 800;
            font-size: 18px;
            color: var(--color-accent);
        }

        /* 功能分组 */
        .feature-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            height: 100%;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-brand);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-hover);
        }

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

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: #fff;
            margin-bottom: 18px;
            box-shadow: 0 6px 18px rgba(124, 58, 237, 0.35);
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--color-text);
        }

        .feature-card p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* 场景卡 */
        .scene-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            height: 100%;
        }

        .scene-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-hover);
        }

        .scene-card .scene-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

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

        .scene-card:hover .scene-img-wrap img {
            transform: scale(1.05);
        }

        .scene-card .scene-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 13, 18, 0) 40%, rgba(11, 13, 18, 0.7) 100%);
        }

        .scene-card .scene-body {
            padding: 22px 24px 24px;
        }

        .scene-card .scene-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .scene-card .scene-body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* 截图演示 */
        .demo-panel {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }

        .demo-panel .demo-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .demo-panel .demo-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .demo-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: rgba(5, 224, 201, 0.12);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 600;
            margin-top: 16px;
        }

        /* 案例卡 */
        .case-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            height: 100%;
        }

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

        .case-card .case-metric {
            font-size: 32px;
            font-weight: 900;
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }

        .case-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .case-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 0;
        }

        /* 套餐 */
        .pricing-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            height: 100%;
            position: relative;
        }

        .pricing-card.featured {
            background: var(--color-surface-2);
            border-color: transparent;
            box-shadow: 0 0 0 2px var(--color-accent), var(--shadow-card);
        }

        .pricing-card.featured .pricing-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            background: var(--gradient-cta);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .pricing-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .pricing-card .price {
            font-size: 40px;
            font-weight: 900;
            color: var(--color-accent);
            margin: 16px 0;
        }

        .pricing-card .price span {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
        }

        .pricing-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .pricing-card ul li {
            padding: 8px 0;
            font-size: 14px;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pricing-card ul li i {
            color: var(--color-accent);
            font-size: 12px;
        }

        /* 品牌介绍 */
        .brand-intro {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }

        .brand-intro::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: var(--gradient-brand);
            opacity: 0.15;
            filter: blur(40px);
        }

        .brand-intro p {
            font-size: 16px;
            color: var(--color-text);
            line-height: 2;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }

        /* 评价墙 */
        .review-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            height: 100%;
        }

        .review-card:hover {
            border-color: var(--color-border-hover);
            box-shadow: var(--shadow-card);
        }

        .review-card .review-stars {
            color: #fbbf24;
            font-size: 13px;
            margin-bottom: 10px;
        }

        .review-card .review-text {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .review-card .review-author {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
        }

        /* 用户口碑 */
        .reputation-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .reputation-score {
            text-align: center;
            padding: 24px 32px;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
        }

        .reputation-score .score-num {
            font-size: 48px;
            font-weight: 900;
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .reputation-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .rep-tag {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            font-size: 13px;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }

        .rep-tag:hover {
            border-color: var(--color-border-hover);
            color: var(--color-text);
        }

        /* 资讯列表 */
        .news-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .news-card .news-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

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

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

        .news-card .news-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-date {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-card .news-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
            line-height: 1.4;
        }

        .news-card .news-excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
            flex: 1;
            margin-bottom: 16px;
        }

        .news-card .news-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            transition: all var(--transition-fast);
        }

        .news-card .news-more:hover {
            color: #fff;
            letter-spacing: 0.04em;
        }

        /* CTA */
        .cta-section {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.12);
            filter: blur(50px);
        }

        .cta-section h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .btn-white-cta {
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            background: #fff;
            color: #141722;
            font-weight: 700;
            font-size: 15px;
            border: none;
            transition: all var(--transition-fast);
            position: relative;
            z-index: 1;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-white-cta:hover {
            color: #141722;
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.28);
        }

        /* Footer */
        .footer {
            background: #07080c;
            padding: 64px 0 32px;
            border-top: 1px solid var(--color-border);
        }

        .footer h5 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--color-text);
        }

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

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

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

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

        .footer .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer .footer-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.9;
            max-width: 320px;
        }

        .footer-divider {
            border-top: 1px solid var(--color-border);
            margin: 40px 0 20px;
            padding-top: 20px;
        }

        .footer-bottom {
            font-size: 13px;
            color: var(--color-text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
        }

        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

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

        /* 响应式 */
        @media (max-width: 991.98px) {
            :root {
                --section-padding: 72px;
            }
            .section-block {
                padding: 72px 0;
            }
            .hero-section {
                min-height: 80vh;
                padding: 100px 0 60px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --section-padding: 56px;
                --section-padding-sm: 40px;
            }
            .section-block {
                padding: 56px 0;
            }
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .hero-section {
                min-height: 75vh;
                padding: 90px 0 48px;
            }
            .hero-title {
                font-size: clamp(26px, 7vw, 34px);
            }
            .hero-desc {
                font-size: 15px;
            }
            .cta-section {
                padding: 36px 24px;
            }
            .brand-intro {
                padding: 28px 22px;
            }
            .demo-panel {
                padding: 24px 20px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-section {
                padding: 80px 0 40px;
                min-height: 70vh;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }
            .stats-badge-bar {
                gap: 10px;
            }
            .stat-pill {
                padding: 8px 16px;
                font-size: 12px;
            }
            .stat-pill .stat-value {
                font-size: 15px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .pricing-card {
                padding: 28px 22px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        /* 无障碍焦点样式 */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(5, 224, 201, 0.6);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

/* roulang page: category1 */
:root {
            --color-bg: #0b0d12;
            --color-surface: #141722;
            --color-surface-2: #1a1f2e;
            --color-primary: #7c3aed;
            --color-accent: #05e0c9;
            --color-cta: #ff6b35;
            --color-text: #edeff5;
            --color-text-muted: #9aa2b8;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-hover: rgba(5, 224, 201, 0.45);
            --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #05e0c9 100%);
            --gradient-cta: linear-gradient(135deg, #ff6b35 0%, #f94d7c 100%);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.5);
            --shadow-nav: 0 8px 28px rgba(0, 0, 0, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --section-padding: 72px;
            --section-padding-sm: 48px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        textarea,
        select {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-block {
            padding: var(--section-padding) 0;
            position: relative;
        }
        .section-block.section-alt {
            background-color: var(--color-surface);
        }
        .section-block.section-dark {
            background-color: var(--color-bg);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 16px;
        }
        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }
        .section-title {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.35;
            margin-bottom: 14px;
            color: var(--color-text);
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 36px;
        }
        /* Navigation */
        .navbar-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 16px 0;
            background: rgba(20, 22, 30, 0.35);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-base), padding var(--transition-base);
        }
        .navbar-glass.scrolled {
            background: rgba(11, 13, 18, 0.98);
            padding: 10px 0;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition-fast);
        }
        .navbar-brand:hover {
            color: var(--color-accent);
        }
        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }
        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            margin: 0 2px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .navbar-nav .nav-link.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.12);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-accent);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition-fast);
            box-shadow: 0 6px 18px rgba(255, 107, 53, 0.35);
        }
        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 10px 24px rgba(255, 107, 53, 0.5);
        }
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 10px;
            border-radius: 8px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        /* Category Header */
        .category-hero {
            padding: 140px 0 48px;
            background: linear-gradient(180deg, rgba(124, 58, 237, 0.12) 0%, rgba(11, 13, 18, 0.98) 100%), var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            position: relative;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(5, 224, 201, 0.4), transparent);
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            border: none;
            padding: 0;
            background: none;
        }
        .breadcrumb-custom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-custom a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-custom .separator {
            color: rgba(255, 255, 255, 0.3);
        }
        .breadcrumb-custom .current {
            color: var(--color-accent);
            font-weight: 500;
        }
        .category-hero h1 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .category-hero .hero-sub {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 28px;
        }
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-top: 8px;
        }
        .filter-btn {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-btn:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.18);
        }
        .filter-btn.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.1);
            border-color: var(--color-border-hover);
        }
        .sort-select {
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            outline: none;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .sort-select:focus {
            border-color: var(--color-border-hover);
            color: #fff;
        }
        .sort-select option {
            background: var(--color-surface-2);
            color: var(--color-text);
        }
        /* Stat Badges */
        .stat-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-border);
            font-size: 13px;
            color: var(--color-text-muted);
            white-space: nowrap;
            transition: all var(--transition-fast);
        }
        .stat-badge .stat-num {
            font-weight: 700;
            color: var(--color-accent);
            font-size: 15px;
        }
        .stat-badge:hover {
            border-color: var(--color-border-hover);
            background: rgba(255, 255, 255, 0.08);
        }
        /* Match List Cards */
        .match-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .match-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-hover);
        }
        .match-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .match-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .match-card:hover .card-img-wrap img {
            transform: scale(1.03);
        }
        .match-card .card-img-wrap .badge-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: rgba(11, 13, 18, 0.8);
            backdrop-filter: blur(6px);
            color: var(--color-accent);
            border: 1px solid rgba(5, 224, 201, 0.3);
        }
        .match-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .match-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }
        .match-card .card-meta i {
            color: var(--color-accent);
            font-size: 12px;
        }
        .match-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.45;
            transition: color var(--transition-fast);
        }
        .match-card:hover .card-title {
            color: var(--color-accent);
        }
        .match-card .card-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .match-card .card-footer-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding-top: 14px;
            border-top: 1px solid var(--color-border);
        }
        .match-card .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .match-card .tag {
            font-size: 12px;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            background: rgba(124, 58, 237, 0.12);
            color: #b89df0;
            border: 1px solid rgba(124, 58, 237, 0.2);
        }
        .match-card .read-more-btn {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .match-card .read-more-btn i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }
        .match-card .read-more-btn:hover {
            color: #fff;
        }
        .match-card .read-more-btn:hover i {
            transform: translateX(3px);
        }
        .load-more-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition-fast);
            margin-top: 28px;
        }
        .load-more-btn:hover {
            background: rgba(5, 224, 201, 0.1);
            border-color: var(--color-border-hover);
            color: var(--color-accent);
        }
        .load-more-btn i {
            font-size: 14px;
        }
        /* Featured */
        .featured-card {
            background: var(--color-surface-2);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition-base);
            height: 100%;
        }
        .featured-card:hover {
            transform: translateY(-3px);
            border-color: var(--color-border-hover);
            box-shadow: var(--shadow-card);
        }
        .featured-card .featured-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }
        .featured-card .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-card:hover .featured-img img {
            transform: scale(1.04);
        }
        .featured-card .featured-body {
            padding: 20px 22px;
        }
        .featured-card .featured-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .featured-card .featured-desc {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        /* Tags */
        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            font-size: 13px;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .topic-tag:hover {
            color: var(--color-accent);
            border-color: var(--color-border-hover);
            background: rgba(5, 224, 201, 0.08);
        }
        .topic-tag i {
            font-size: 12px;
            color: var(--color-accent);
        }
        /* CTA */
        .cta-card {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            overflow: hidden;
            position: relative;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(0, 0, 0, 0.1);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            line-height: 1.8;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: var(--radius-pill);
            background: #fff;
            color: #0b0d12;
            font-weight: 700;
            font-size: 15px;
            transition: all var(--transition-fast);
            position: relative;
            z-index: 1;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
        }
        .cta-btn:hover {
            color: #0b0d12;
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(0, 0, 0, 0.35);
        }
        /* FAQ */
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.15);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            font-size: 16px;
            color: var(--color-accent);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 22px;
            border-left: 3px solid var(--color-accent);
            color: var(--color-text-muted);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-answer.show {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        /* Footer */
        .footer {
            background: #0a0c11;
            border-top: 1px solid var(--color-border);
            padding: 56px 0 28px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 340px;
        }
        .footer h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer-divider {
            border-top: 1px solid var(--color-border);
            margin: 36px 0 20px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        /* Responsive */
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(11, 13, 18, 0.97);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                border-radius: var(--radius-md);
                padding: 16px 18px;
                margin-top: 12px;
                border: 1px solid var(--color-border);
            }
            .navbar-nav .nav-link {
                padding: 10px 14px;
                margin: 4px 0;
            }
            .nav-cta-btn {
                margin-top: 12px;
                justify-content: center;
            }
            .category-hero {
                padding: 120px 0 36px;
            }
            .cta-card {
                padding: 36px 24px;
                border-radius: var(--radius-md);
            }
        }
        @media (max-width: 767px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .filter-bar {
                gap: 8px;
            }
            .filter-btn {
                padding: 6px 14px;
                font-size: 12px;
            }
            .match-card .card-body {
                padding: 16px 18px 18px;
            }
            .match-card .card-title {
                font-size: 16px;
            }
            .section-block {
                padding: var(--section-padding-sm) 0;
            }
            .section-title {
                font-size: 21px;
            }
            .footer {
                padding: 40px 0 20px;
            }
            .cta-card {
                padding: 28px 20px;
            }
            .cta-card h2 {
                font-size: 20px;
            }
        }
        @media (max-width: 575px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .category-hero {
                padding: 110px 0 28px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .hero-sub {
                font-size: 14px;
            }
            .stat-badge {
                padding: 6px 12px;
                font-size: 12px;
            }
            .stat-badge .stat-num {
                font-size: 13px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: category3 */
:root {
            --color-bg: #0b0d12;
            --color-surface: #141722;
            --color-surface-2: #1a1f2e;
            --color-primary: #7c3aed;
            --color-accent: #05e0c9;
            --color-cta: #ff6b35;
            --color-text: #edeff5;
            --color-text-muted: #9aa2b8;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-hover: rgba(5, 224, 201, 0.45);
            --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #05e0c9 100%);
            --gradient-cta: linear-gradient(135deg, #ff6b35 0%, #f94d7c 100%);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.5);
            --shadow-nav: 0 8px 28px rgba(0, 0, 0, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --section-padding: 72px;
            --section-padding-sm: 48px;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            color: inherit;
        }

        input,
        textarea,
        select {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-block {
            padding: var(--section-padding) 0;
            position: relative;
        }

        .section-block.section-alt {
            background-color: var(--color-surface);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 16px;
        }

        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.35;
            margin-bottom: 16px;
            color: var(--color-text);
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 40px;
        }

        /* Navigation */
        .navbar-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 16px 0;
            background: rgba(20, 22, 30, 0.35);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-base), padding var(--transition-base);
        }

        .navbar-glass.scrolled {
            background: rgba(11, 13, 18, 0.98);
            padding: 10px 0;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }

        .navbar-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition-fast);
        }

        .navbar-brand:hover {
            color: var(--color-accent);
        }

        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }

        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            margin: 0 2px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            position: relative;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .navbar-nav .nav-link.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.12);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            padding: 8px 12px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.7%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.35);
            outline: none;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--gradient-cta);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-base);
            white-space: nowrap;
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
        }

        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(255, 107, 53, 0.5);
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(11, 13, 18, 0.97);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid rgba(255, 255, 255, 0.08);
            }
            .nav-cta-btn {
                margin-top: 12px;
                justify-content: center;
                width: 100%;
            }
        }

        /* Page header area for category page */
        .page-header {
            padding-top: 140px;
            padding-bottom: 48px;
            background-color: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            position: relative;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 20% 0%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(5, 224, 201, 0.08) 0%, transparent 45%);
            pointer-events: none;
        }

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

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-custom .separator {
            color: rgba(255, 255, 255, 0.25);
            font-size: 12px;
        }

        .page-header h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #fff;
        }

        .page-header .lead {
            font-size: 17px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 28px;
        }

        /* Filter toolbar */
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 16px 20px;
            background: rgba(20, 22, 30, 0.7);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(8px);
        }

        .filter-group {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }

        .filter-label {
            font-size: 13px;
            color: var(--color-text-muted);
            font-weight: 600;
            margin-right: 4px;
            letter-spacing: 0.05em;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            background: rgba(255, 255, 255, 0.03);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .filter-chip:hover {
            border-color: var(--color-border-hover);
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .filter-chip.active {
            background: var(--gradient-brand);
            border-color: transparent;
            color: #fff;
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
        }

        .filter-divider {
            width: 1px;
            height: 28px;
            background: var(--color-border);
            margin: 0 8px;
        }

        @media (max-width: 576px) {
            .filter-toolbar {
                padding: 12px 14px;
            }
            .filter-divider {
                display: none;
            }
        }

        /* Data badge strip */
        .badge-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            padding: 28px 32px;
            background: rgba(20, 22, 30, 0.6);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
        }

        .badge-strip .stat-badge {
            display: flex;
            align-items: center;
            gap: 12px;
            min-width: 150px;
        }

        .badge-strip .stat-badge .stat-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(5, 224, 201, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .badge-strip .stat-badge .stat-number {
            font-size: 24px;
            font-weight: 800;
            color: var(--color-accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .badge-strip .stat-badge .stat-text {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        @media (max-width: 768px) {
            .badge-strip {
                padding: 20px;
                gap: 12px;
            }
            .badge-strip .stat-badge {
                min-width: 120px;
            }
            .badge-strip .stat-badge .stat-number {
                font-size: 20px;
            }
        }

        /* Review list cards - horizontal layout */
        .review-card {
            display: flex;
            flex-direction: row;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            overflow: hidden;
            transition: all var(--transition-base);
            height: 100%;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

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

        .review-card .review-thumb {
            width: 280px;
            min-width: 280px;
            position: relative;
            overflow: hidden;
            flex-shrink: 0;
        }

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

        .review-card:hover .review-thumb img {
            transform: scale(1.03);
        }

        .review-card .review-thumb .thumb-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .review-card .thumb-overlay .thumb-tag {
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(6px);
            color: #fff;
            letter-spacing: 0.03em;
        }

        .review-card .review-body {
            flex: 1;
            padding: 24px 28px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .review-card .review-category {
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-accent);
        }

        .review-card .review-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin: 0;
        }

        .review-card .review-summary {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.85;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }

        .review-card .review-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
        }

        .review-card .review-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .review-card .review-meta .meta-item i {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        .review-card .review-meta .rating-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 700;
            color: #ffc107;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            background: rgba(255, 193, 7, 0.1);
            border: 1px solid rgba(255, 193, 7, 0.2);
        }

        @media (max-width: 768px) {
            .review-card {
                flex-direction: column;
            }
            .review-card .review-thumb {
                width: 100%;
                min-width: auto;
                aspect-ratio: 16/9;
            }
            .review-card .review-body {
                padding: 20px;
            }
        }

        /* Featured section - horizontal cards */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .featured-card {
            background: var(--color-surface-2);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }

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

        .featured-card .featured-thumb {
            aspect-ratio: 16/10;
            overflow: hidden;
            position: relative;
        }

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

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

        .featured-card .featured-body {
            padding: 20px;
        }

        .featured-card .featured-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .featured-card .featured-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .featured-card .featured-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-accent);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: rgba(5, 224, 201, 0.1);
            display: inline-block;
        }

        @media (max-width: 991px) {
            .featured-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-cloud .tag-item {
            font-size: 14px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
            cursor: default;
            background: rgba(255, 255, 255, 0.03);
        }

        .tag-cloud .tag-item:hover {
            border-color: var(--color-border-hover);
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.06);
        }

        .tag-cloud .tag-item.tag-large {
            font-size: 16px;
            font-weight: 700;
            padding: 10px 24px;
            color: var(--color-text);
        }

        /* Resource list */
        .resource-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
        }

        .resource-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

        .resource-item:hover {
            border-color: var(--color-border-hover);
            transform: translateX(4px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
        }

        .resource-item .resource-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(124, 58, 237, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .resource-item .resource-text {
            flex: 1;
        }

        .resource-item .resource-text .resource-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 2px;
        }

        .resource-item .resource-text .resource-desc {
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .resource-item .resource-arrow {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

        .resource-item:hover .resource-arrow {
            color: var(--color-accent);
        }

        @media (max-width: 768px) {
            .resource-list {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ accordion */
        .faq-accordion .accordion-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-accordion .accordion-item:hover {
            border-color: var(--color-border-hover);
        }

        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--color-text);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-md) !important;
            transition: color var(--transition-fast);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(5, 224, 201, 0.04);
            color: var(--color-accent);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.25);
            outline: none;
        }

        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%239aa2b8'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform var(--transition-fast);
        }

        .faq-accordion .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2305e0c9'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .faq-accordion .accordion-body {
            padding: 0 22px 20px;
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.85;
            border-left: 3px solid var(--color-accent);
            margin-left: 22px;
            border-radius: 0 0 var(--radius-md) 0;
        }

        /* CTA section */
        .cta-panel {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            pointer-events: none;
        }

        .cta-panel::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }

        .cta-panel .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-panel h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-panel p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            line-height: 1.85;
            margin-bottom: 28px;
        }

        .cta-panel .btn-cta-white {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            color: #1a1f2e;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-base);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.25);
        }

        .cta-panel .btn-cta-white:hover {
            color: #1a1f2e;
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
        }

        @media (max-width: 576px) {
            .cta-panel {
                padding: 36px 24px;
            }
            .cta-panel .btn-cta-white {
                width: 100%;
                justify-content: center;
            }
        }

        /* Footer */
        .footer {
            background: var(--color-surface);
            padding: 64px 0 32px;
            border-top: 1px solid var(--color-border);
        }

        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-desc {
            color: var(--color-text-muted);
            font-size: 14px;
            line-height: 1.85;
            max-width: 320px;
        }

        .footer h5 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

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

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

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

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

        .footer-divider {
            border-top: 1px solid var(--color-border);
            margin: 40px 0 24px;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

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

        @media (max-width: 576px) {
            .footer {
                padding: 40px 0 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* Responsive section padding */
        @media (max-width: 576px) {
            .section-block {
                padding: var(--section-padding-sm) 0;
            }
            .page-header {
                padding-top: 100px;
                padding-bottom: 32px;
            }
            .page-header h1 {
                font-size: 24px;
            }
            .page-header .lead {
                font-size: 15px;
            }
        }

        /* Review list grid */
        .review-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        @media (max-width: 991px) {
            .review-list {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
:root {
            --color-bg: #0b0d12;
            --color-surface: #141722;
            --color-surface-2: #1a1f2e;
            --color-primary: #7c3aed;
            --color-accent: #05e0c9;
            --color-cta: #ff6b35;
            --color-text: #edeff5;
            --color-text-muted: #9aa2b8;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-hover: rgba(5, 224, 201, 0.45);
            --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #05e0c9 100%);
            --gradient-cta: linear-gradient(135deg, #ff6b35 0%, #f94d7c 100%);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.5);
            --shadow-nav: 0 8px 28px rgba(0, 0, 0, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --section-padding: 72px;
            --section-padding-sm: 48px;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
            padding-top: 72px;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        input, textarea, select {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Section 通用 */
        .section-block {
            padding: var(--section-padding) 0;
            position: relative;
        }

        .section-block.section-alt {
            background-color: var(--color-surface);
        }

        .section-block.section-dark {
            background-color: var(--color-bg);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 16px;
        }

        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--color-text);
        }

        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 40px;
        }

        /* Navigation */
        .navbar-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 14px 0;
            background: rgba(20, 22, 30, 0.35);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-base), padding var(--transition-base), box-shadow var(--transition-base);
        }

        .navbar-glass.scrolled {
            background: rgba(11, 13, 18, 0.98);
            padding: 8px 0;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }

        .navbar-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition-fast);
        }

        .navbar-brand:hover {
            color: var(--color-accent);
        }

        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }

        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            margin: 0 2px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            position: relative;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        .navbar-nav .nav-link.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.12);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border-radius: var(--radius-pill);
            background: var(--gradient-cta);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.35);
        }

        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.5);
            filter: brightness(1.08);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.25);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Breadcrumb */
        .breadcrumb-area {
            padding: 0;
            margin-bottom: 14px;
        }

        .breadcrumb {
            --bs-breadcrumb-divider-color: rgba(255, 255, 255, 0.4);
            --bs-breadcrumb-item-active-color: var(--color-accent);
            margin-bottom: 0;
            font-size: 14px;
        }

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

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

        .breadcrumb-item.active {
            color: var(--color-accent);
        }

        /* Category Hero - 分类标题区（非全屏Hero） */
        .category-hero {
            position: relative;
            padding: 56px 0 48px;
            background-image: url('/assets/images/53eed13bf409e4ac.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 13, 18, 0.72) 0%, rgba(11, 13, 18, 0.88) 60%, var(--color-bg) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero h1 {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .category-hero .category-desc {
            font-size: 16px;
            color: rgba(237, 239, 245, 0.8);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* Filter Bar */
        .filter-bar {
            margin-top: 28px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 14px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .filter-bar .filter-label {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-right: 4px;
            white-space: nowrap;
        }

        .filter-bar .filter-tag {
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--color-border);
            background: rgba(255, 255, 255, 0.04);
            color: var(--color-text-muted);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition-fast);
        }

        .filter-bar .filter-tag:hover,
        .filter-bar .filter-tag:focus {
            color: var(--color-accent);
            border-color: var(--color-border-hover);
            background: rgba(5, 224, 201, 0.08);
        }

        .filter-bar .filter-tag.active {
            color: var(--color-accent);
            border-color: rgba(5, 224, 201, 0.5);
            background: rgba(5, 224, 201, 0.12);
        }

        /* Guide Cards Grid */
        .guide-grid {
            margin-top: 32px;
        }

        .guide-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

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

        .guide-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            flex-shrink: 0;
        }

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

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

        .guide-card .card-difficulty {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: rgba(11, 13, 18, 0.72);
            backdrop-filter: blur(8px);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .guide-card .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .guide-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.45;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .guide-card .card-summary {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .guide-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .guide-card .card-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
            white-space: nowrap;
        }

        .guide-card .card-meta .meta-item i {
            color: var(--color-accent);
            font-size: 12px;
        }

        .guide-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .guide-card .card-tags .tag {
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            background: rgba(5, 224, 201, 0.1);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 500;
        }

        /* Data Badge Bar */
        .badge-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 8px;
        }

        .badge-capsule {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 22px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            backdrop-filter: blur(8px);
            transition: all var(--transition-fast);
        }

        .badge-capsule:hover {
            border-color: var(--color-border-hover);
            background: rgba(255, 255, 255, 0.07);
        }

        .badge-capsule .badge-number {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-accent);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .badge-capsule .badge-label {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.3;
        }

        /* Featured Cards */
        .featured-card {
            background: var(--color-surface-2);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        .featured-card .featured-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-card .featured-tag {
            font-size: 12px;
            color: var(--color-accent);
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .featured-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .featured-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .featured-card .featured-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* Topic Tags */
        .topic-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .topic-tag {
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition-fast);
        }

        .topic-tag:hover {
            color: var(--color-accent);
            border-color: var(--color-border-hover);
            background: rgba(5, 224, 201, 0.08);
            transform: translateY(-2px);
        }

        /* Resource Items */
        .resource-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            border-radius: var(--radius-md);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
            height: 100%;
        }

        .resource-item:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .resource-item .resource-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(5, 224, 201, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .resource-item .resource-info h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .resource-item .resource-info p {
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 0;
        }

        /* FAQ */
        .accordion-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm) !important;
            overflow: hidden;
            margin-bottom: 12px;
            box-shadow: none;
        }

        .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-button {
            background: var(--color-surface);
            color: var(--color-text);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 22px;
            border-radius: var(--radius-sm) !important;
            box-shadow: none !important;
            transition: all var(--transition-fast);
            position: relative;
        }

        .accordion-button:not(.collapsed) {
            background: var(--color-surface-2);
            color: var(--color-accent);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.2);
            border-color: var(--color-border-hover);
        }

        .accordion-button::after {
            filter: brightness(0) invert(0.7);
        }

        .accordion-button:not(.collapsed)::after {
            filter: brightness(0) invert(1) sepia(1) saturate(4) hue-rotate(130deg);
        }

        .accordion-body {
            background: var(--color-surface);
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.8;
            padding: 4px 22px 22px;
            border-left: 3px solid var(--color-accent);
            margin-left: 0;
        }

        /* CTA Area */
        .cta-card {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 48px rgba(124, 58, 237, 0.4);
        }

        .cta-card::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            z-index: 1;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            bottom: -50%;
            left: 20%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            z-index: 1;
        }

        .cta-card .container, 
        .cta-card .row {
            position: relative;
            z-index: 2;
        }

        .cta-card h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .cta-input-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            max-width: 480px;
        }

        .cta-input-group input {
            flex: 1;
            min-width: 220px;
            padding: 13px 20px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: all var(--transition-fast);
            backdrop-filter: blur(6px);
        }

        .cta-input-group input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .cta-input-group input:focus {
            border-color: rgba(255, 255, 255, 0.6);
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
        }

        .btn-cta-solid {
            padding: 13px 28px;
            border-radius: var(--radius-pill);
            background: #fff;
            color: #1a1f2e;
            font-size: 15px;
            font-weight: 700;
            transition: all var(--transition-fast);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-cta-solid:hover {
            color: #1a1f2e;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.25);
            filter: brightness(1.05);
        }

        /* Footer */
        .footer {
            background: var(--color-surface);
            padding: 64px 0 32px;
            border-top: 1px solid var(--color-border);
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
            max-width: 340px;
        }

        .footer h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

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

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

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

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

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin: 32px 0 20px;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-muted);
        }

        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }

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

        /* Responsive */
        @media (max-width: 991.98px) {
            .navbar-glass .navbar-collapse {
                background: rgba(11, 13, 18, 0.96);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--color-border);
                backdrop-filter: blur(16px);
            }

            .navbar-nav .nav-link {
                padding: 10px 16px;
                margin: 2px 0;
            }

            .nav-cta-btn {
                margin-top: 10px;
                justify-content: center;
            }
        }

        @media (max-width: 767.98px) {
            body {
                padding-top: 64px;
            }

            .navbar-glass {
                padding: 10px 0;
            }

            .category-hero {
                padding: 36px 0 32px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .filter-bar {
                gap: 8px;
            }

            .filter-bar .filter-tag {
                padding: 6px 12px;
                font-size: 12px;
            }

            .section-block {
                padding: var(--section-padding-sm) 0;
            }

            .cta-card {
                padding: 36px 24px;
            }

            .cta-input-group {
                flex-direction: column;
            }

            .cta-input-group input {
                min-width: 100%;
            }

            .btn-cta-solid {
                width: 100%;
                justify-content: center;
            }

            .badge-capsule {
                padding: 10px 16px;
            }

            .badge-capsule .badge-number {
                font-size: 18px;
            }

            .guide-card .card-body {
                padding: 16px 18px 18px;
            }

            .guide-card .card-title {
                font-size: 16px;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .category-hero h1 {
                font-size: 22px;
            }

            .category-hero .category-desc {
                font-size: 14px;
            }

            .filter-bar .filter-label {
                font-size: 12px;
            }

            .footer {
                padding: 48px 0 24px;
            }

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

/* roulang page: category4 */
:root {
            --color-bg: #0b0d12;
            --color-surface: #141722;
            --color-surface-2: #1a1f2e;
            --color-primary: #7c3aed;
            --color-accent: #05e0c9;
            --color-cta: #ff6b35;
            --color-text: #edeff5;
            --color-text-muted: #9aa2b8;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-hover: rgba(5, 224, 201, 0.45);
            --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #05e0c9 100%);
            --gradient-cta: linear-gradient(135deg, #ff6b35 0%, #f94d7c 100%);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.5);
            --shadow-nav: 0 8px 28px rgba(0, 0, 0, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --section-padding: 72px;
            --section-padding-sm: 40px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
            padding-top: 72px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        textarea,
        select {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-block {
            padding: var(--section-padding) 0;
            position: relative;
        }
        .section-block.section-alt {
            background-color: var(--color-surface);
        }
        .section-block.section-dark {
            background-color: var(--color-bg);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 16px;
        }
        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }
        .section-title {
            font-size: clamp(24px, 3.5vw, 34px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 40px;
        }
        .navbar-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 16px 0;
            background: rgba(20, 22, 30, 0.35);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-base), padding var(--transition-base);
        }
        .navbar-glass.scrolled {
            background: rgba(11, 13, 18, 0.98);
            padding: 10px 0;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition-fast);
        }
        .navbar-brand:hover {
            color: var(--color-accent);
        }
        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }
        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            margin: 0 2px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .navbar-nav .nav-link.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.12);
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 0.02em;
            box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(255, 107, 53, 0.5);
        }
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            padding: 8px 10px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.3);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .breadcrumb-wrapper {
            padding: 20px 0 12px;
            background: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
        }
        .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
            font-size: 14px;
            font-weight: 500;
        }
        .breadcrumb-item a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-item a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-item.active {
            color: var(--color-accent);
        }
        .breadcrumb-item+.breadcrumb-item::before {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: rgba(255, 255, 255, 0.3);
            font-size: 12px;
            padding: 0 8px;
        }
        .page-header-section {
            padding: 40px 0 36px;
            background: var(--color-bg);
            position: relative;
            overflow: hidden;
        }
        .page-header-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.12) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }
        .page-header-section .container {
            position: relative;
            z-index: 1;
        }
        .page-header-content {
            display: flex;
            flex-wrap: wrap;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
        }
        .page-header-text {
            max-width: 680px;
        }
        .page-header-text h1 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 14px;
            color: #fff;
        }
        .page-header-text .lead {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 0;
            max-width: 620px;
        }
        .header-meta-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition-fast);
        }
        .badge-pill:hover {
            border-color: var(--color-border-hover);
            background: rgba(5, 224, 201, 0.08);
            color: var(--color-accent);
        }
        .badge-pill .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            box-shadow: 0 0 10px rgba(5, 224, 201, 0.6);
        }
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin-top: 28px;
        }
        .filter-toolbar .filter-label {
            font-size: 14px;
            color: var(--color-text-muted);
            font-weight: 500;
            margin-right: 4px;
        }
        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: transparent;
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .filter-btn:hover,
        .filter-btn:focus {
            border-color: var(--color-border-hover);
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
        }
        .filter-btn.active {
            background: var(--gradient-brand);
            border-color: transparent;
            color: #fff;
            box-shadow: 0 6px 18px rgba(124, 58, 237, 0.4);
        }
        .stats-strip {
            padding: 28px 0;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
        }
        .stats-strip .container {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 40px;
            align-items: center;
            justify-content: flex-start;
        }
        .stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .stat-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(5, 224, 201, 0.1);
            border: 1px solid rgba(5, 224, 201, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-accent);
            flex-shrink: 0;
        }
        .stat-text {
            display: flex;
            flex-direction: column;
        }
        .stat-number {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .stat-number .stat-unit {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            margin-left: 2px;
        }
        .stat-label {
            font-size: 13px;
            color: var(--color-text-muted);
            font-weight: 500;
        }
        .news-list-section {
            padding: 48px 0 60px;
            background: var(--color-bg);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-hover);
        }
        .news-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            flex-shrink: 0;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.06);
        }
        .news-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0) 40%, rgba(11, 13, 18, 0.75) 100%);
            pointer-events: none;
        }
        .news-card-category {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: rgba(11, 13, 18, 0.75);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
        }
        .news-card-body {
            padding: 24px 26px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-card-date {
            font-size: 13px;
            color: var(--color-text-muted);
            font-weight: 500;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-card-date i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
        }
        .news-card-title {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.45;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card:hover .news-card-title {
            color: var(--color-accent);
        }
        .news-card-summary {
            font-size: 14.5px;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 18px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 14px;
            border-top: 1px solid var(--color-border);
        }
        .news-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .news-card-tag {
            font-size: 11px;
            color: var(--color-text-muted);
            background: rgba(255, 255, 255, 0.05);
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            font-weight: 500;
            letter-spacing: 0.03em;
        }
        .read-more-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            background: transparent;
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 13px;
            font-weight: 600;
            transition: all var(--transition-fast);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .read-more-btn:hover {
            background: var(--gradient-brand);
            border-color: transparent;
            color: #fff;
            box-shadow: 0 6px 18px rgba(124, 58, 237, 0.4);
        }
        .read-more-btn i {
            font-size: 12px;
            transition: transform var(--transition-fast);
        }
        .read-more-btn:hover i {
            transform: translateX(3px);
        }
        .featured-section {
            padding: 60px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            background: var(--color-surface-2);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .featured-card:hover {
            border-color: var(--color-border-hover);
            box-shadow: var(--shadow-card-hover);
        }
        .featured-img {
            position: relative;
            min-height: 360px;
            overflow: hidden;
        }
        .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .featured-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 13, 18, 0.6) 0%, rgba(11, 13, 18, 0.2) 100%);
        }
        .featured-body {
            padding: 36px 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-cta);
            margin-bottom: 14px;
        }
        .featured-label i {
            font-size: 10px;
        }
        .featured-title {
            font-size: 26px;
            font-weight: 800;
            line-height: 1.4;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .featured-summary {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.85;
            margin-bottom: 20px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .featured-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .featured-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .topics-section {
            padding: 60px 0;
            background: var(--color-bg);
        }
        .topic-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .topic-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition-fast);
        }
        .topic-tag:hover {
            border-color: var(--color-border-hover);
            background: rgba(5, 224, 201, 0.08);
            color: var(--color-accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .topic-tag .topic-count {
            font-size: 12px;
            color: var(--color-text-muted);
            background: rgba(255, 255, 255, 0.06);
            padding: 2px 8px;
            border-radius: var(--radius-pill);
            font-weight: 600;
        }
        .topic-tag:hover .topic-count {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.15);
        }
        .subscribe-cta-section {
            padding: 60px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .subscribe-cta-card {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            box-shadow: 0 24px 60px rgba(124, 58, 237, 0.35);
            position: relative;
            overflow: hidden;
        }
        .subscribe-cta-card::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .subscribe-cta-card::after {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -5%;
            width: 350px;
            height: 350px;
            background: rgba(0, 0, 0, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }
        .subscribe-content {
            position: relative;
            z-index: 1;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .subscribe-text h2 {
            font-size: clamp(22px, 2.8vw, 30px);
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            margin-bottom: 10px;
        }
        .subscribe-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 480px;
        }
        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
            flex-shrink: 0;
        }
        .subscribe-form input {
            width: 280px;
            padding: 14px 20px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: all var(--transition-fast);
            backdrop-filter: blur(6px);
        }
        .subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .subscribe-form input:focus {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.22);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.25);
        }
        .subscribe-form .btn-subscribe {
            padding: 14px 30px;
            border-radius: var(--radius-pill);
            background: #fff;
            color: var(--color-primary);
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            white-space: nowrap;
            border: none;
        }
        .subscribe-form .btn-subscribe:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.25);
        }
        .faq-section {
            padding: 60px 0;
            background: var(--color-bg);
        }
        .accordion-custom .accordion-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .accordion-custom .accordion-item:hover {
            border-color: var(--color-border-hover);
        }
        .accordion-custom .accordion-button {
            background: var(--color-surface);
            color: var(--color-text);
            font-size: 15px;
            font-weight: 600;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            border-radius: 14px;
            transition: all var(--transition-fast);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--color-surface-2);
            color: #fff;
            box-shadow: none;
            border-bottom: 1px solid rgba(5, 224, 201, 0.2);
            border-radius: 14px 14px 0 0;
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.25);
            border-color: var(--color-border-hover);
        }
        .accordion-custom .accordion-button::after {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            background-image: none;
            color: var(--color-accent);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }
        .accordion-custom .accordion-button:not(.collapsed)::after {
            content: '\f068';
            color: var(--color-accent);
        }
        .accordion-custom .accordion-body {
            background: var(--color-surface);
            color: var(--color-text-muted);
            font-size: 14.5px;
            line-height: 1.85;
            padding: 18px 22px 20px;
            border-left: 3px solid var(--color-accent);
            margin-left: 8px;
        }
        .footer {
            background: #08090e;
            border-top: 1px solid var(--color-border);
            padding: 56px 0 28px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            font-size: 14px;
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer-divider {
            border-top: 1px solid var(--color-border);
            margin: 32px 0 20px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--gradient-brand);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 12px 32px rgba(124, 58, 237, 0.45);
            z-index: 1000;
            transition: all var(--transition-base);
            opacity: 0;
            visibility: hidden;
            border: none;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(124, 58, 237, 0.6);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(11, 13, 18, 0.98);
                backdrop-filter: blur(16px);
                border-radius: 16px;
                padding: 16px 20px;
                border: 1px solid var(--color-border);
                margin-top: 12px;
                max-height: 70vh;
                overflow-y: auto;
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-cta-btn {
                margin-top: 8px;
                justify-content: center;
                width: 100%;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .featured-card {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .featured-img {
                min-height: 240px;
            }
            .subscribe-cta-card {
                padding: 36px 28px;
            }
            .subscribe-form input {
                width: 100%;
            }
            .subscribe-form .btn-subscribe {
                width: 100%;
            }
        }
        @media (max-width: 767.98px) {
            body {
                padding-top: 64px;
            }
            .page-header-section {
                padding: 28px 0 24px;
            }
            .page-header-text h1 {
                font-size: 26px;
            }
            .page-header-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .header-meta-badges {
                gap: 8px;
            }
            .stats-strip .container {
                gap: 16px 24px;
            }
            .stat-number {
                font-size: 19px;
            }
            .news-card-body {
                padding: 18px 18px 16px;
            }
            .news-card-title {
                font-size: 17px;
            }
            .news-card-summary {
                font-size: 13.5px;
                -webkit-line-clamp: 2;
            }
            .read-more-btn {
                padding: 6px 12px;
                font-size: 12px;
            }
            .featured-body {
                padding: 24px 20px;
            }
            .featured-title {
                font-size: 21px;
            }
            .subscribe-cta-card {
                padding: 28px 20px;
            }
            .subscribe-content {
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-form input {
                width: 100%;
            }
            .footer {
                padding: 40px 0 20px;
            }
            .back-to-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .section-block {
                padding: var(--section-padding-sm) 0;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-card-summary {
                -webkit-line-clamp: 2;
            }
            .filter-toolbar {
                gap: 6px;
                overflow-x: auto;
                flex-wrap: nowrap;
                padding-bottom: 8px;
                -webkit-overflow-scrolling: touch;
            }
            .filter-btn {
                padding: 7px 14px;
                font-size: 12px;
                flex-shrink: 0;
            }
            .topic-cloud {
                gap: 8px;
            }
            .topic-tag {
                padding: 8px 14px;
                font-size: 12.5px;
            }
            .stat-item {
                gap: 8px;
            }
            .stat-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
            .stat-number {
                font-size: 17px;
            }
            .stat-label {
                font-size: 11.5px;
            }
        }

/* roulang page: category5 */
:root {
            --color-bg: #0b0d12;
            --color-surface: #141722;
            --color-surface-2: #1a1f2e;
            --color-primary: #7c3aed;
            --color-accent: #05e0c9;
            --color-cta: #ff6b35;
            --color-text: #edeff5;
            --color-text-muted: #9aa2b8;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-hover: rgba(5, 224, 201, 0.45);
            --gradient-brand: linear-gradient(135deg, #7c3aed 0%, #05e0c9 100%);
            --gradient-cta: linear-gradient(135deg, #ff6b35 0%, #f94d7c 100%);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 24px 52px rgba(0, 0, 0, 0.5);
            --shadow-nav: 0 8px 28px rgba(0, 0, 0, 0.25);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            --section-padding: 96px;
            --section-padding-sm: 56px;
        }
        @media (max-width: 991px) {
            :root {
                --section-padding: 72px;
            }
        }
        @media (max-width: 575px) {
            :root {
                --section-padding: 56px;
                --section-padding-sm: 40px;
            }
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        textarea,
        select {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-block {
            padding: var(--section-padding) 0;
            position: relative;
        }
        .section-block.section-alt {
            background-color: var(--color-surface);
        }
        .section-block.section-dark {
            background-color: var(--color-bg);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 16px;
        }
        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
        }
        .section-title {
            font-size: clamp(24px, 3.5vw, 32px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 40px;
        }
        /* Navigation */
        .navbar-glass {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            padding: 16px 0;
            background: rgba(20, 22, 30, 0.35);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-base), padding var(--transition-base);
        }
        .navbar-glass.scrolled {
            background: rgba(11, 13, 18, 0.98);
            padding: 10px 0;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
            border-bottom-color: rgba(255, 255, 255, 0.06);
        }
        .navbar-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: color var(--transition-fast);
        }
        .navbar-brand:hover {
            color: var(--color-accent);
        }
        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }
        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 14px;
            margin: 0 2px;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .navbar-nav .nav-link.active {
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.12);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: var(--gradient-cta);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-cta-btn:hover {
            color: #fff;
            transform: scale(1.04);
            box-shadow: 0 8px 22px rgba(255, 107, 53, 0.4);
        }
        .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 24px;
            padding: 8px 10px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 10px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(5, 224, 201, 0.35);
            outline: none;
        }
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(11, 13, 18, 0.97);
                backdrop-filter: blur(14px);
                -webkit-backdrop-filter: blur(14px);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--color-border);
            }
            .navbar-nav .nav-link {
                padding: 10px 16px;
                margin: 2px 0;
            }
            .nav-cta-btn {
                margin-top: 10px;
                justify-content: center;
                width: 100%;
            }
        }
        /* Breadcrumb */
        .breadcrumb-wrapper {
            padding-top: 110px;
            padding-bottom: 0;
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb-custom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-custom a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-custom .separator {
            color: rgba(255, 255, 255, 0.25);
            font-size: 12px;
        }
        .breadcrumb-custom .current {
            color: var(--color-accent);
            font-weight: 600;
        }
        /* Category Header */
        .category-header {
            padding: 20px 0 48px;
            position: relative;
            z-index: 1;
        }
        .category-header .category-h1 {
            font-size: clamp(32px, 4.5vw, 44px);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 16px;
        }
        .category-header .category-lead {
            font-size: 17px;
            color: var(--color-text-muted);
            max-width: 720px;
            line-height: 1.9;
            margin-bottom: 28px;
        }
        .filter-sort-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .filter-btn {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-text-muted);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }
        .filter-btn:hover,
        .filter-btn:focus {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: var(--color-border-hover);
        }
        .filter-btn.active-filter {
            background: var(--gradient-brand);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 16px rgba(5, 224, 201, 0.3);
        }
        /* Data badges */
        .data-badge-wall {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }
        .data-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--color-border);
            font-size: 14px;
            color: var(--color-text-muted);
        }
        .data-pill .data-number {
            color: var(--color-accent);
            font-weight: 700;
            font-size: 16px;
        }
        /* Topic cards */
        .topic-card-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .topic-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-border-hover);
        }
        .topic-card-img {
            aspect-ratio: 16/10;
            object-fit: cover;
            width: 100%;
        }
        .topic-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .topic-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: rgba(5, 224, 201, 0.12);
            color: var(--color-accent);
            letter-spacing: 0.02em;
        }
        .topic-tag.tag-orange {
            background: rgba(255, 107, 53, 0.14);
            color: #ffa57f;
        }
        .topic-tag.tag-purple {
            background: rgba(124, 58, 237, 0.16);
            color: #b895ff;
        }
        .topic-card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--color-text);
            margin-bottom: 10px;
        }
        .topic-card-title a {
            color: inherit;
            transition: color var(--transition-fast);
        }
        .topic-card-title a:hover {
            color: var(--color-accent);
        }
        .topic-card-summary {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .topic-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--color-border);
        }
        .topic-card-meta i {
            color: var(--color-accent);
            margin-right: 4px;
        }
        .topic-card-meta .meta-stat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .list-more-wrap {
            text-align: center;
            margin-top: 36px;
        }
        .btn-outline-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--color-border-hover);
            color: var(--color-accent);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition-fast);
            background: transparent;
        }
        .btn-outline-accent:hover {
            background: rgba(5, 224, 201, 0.1);
            color: var(--color-accent);
            border-color: var(--color-accent);
            transform: scale(1.02);
        }
        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            font-size: 14px;
            color: var(--color-text-muted);
            transition: all var(--transition-fast);
        }
        .tag-cloud-item:hover {
            border-color: var(--color-border-hover);
            color: var(--color-accent);
            background: rgba(5, 224, 201, 0.06);
        }
        .tag-cloud-item .tag-count {
            font-size: 12px;
            color: var(--color-accent);
            font-weight: 600;
        }
        /* Contributor ranking */
        .contributor-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .contributor-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: all var(--transition-fast);
        }
        .contributor-card:hover {
            border-color: var(--color-border-hover);
            transform: translateY(-3px);
        }
        .contributor-avatar {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--gradient-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: #fff;
            margin: 0 auto 14px;
            box-shadow: 0 6px 18px rgba(124, 58, 237, 0.35);
        }
        .contributor-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .contributor-role {
            font-size: 13px;
            color: var(--color-accent);
            font-weight: 600;
            margin-bottom: 10px;
        }
        .contributor-stats {
            display: flex;
            justify-content: center;
            gap: 18px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .contributor-stats span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .contributor-stats i {
            color: var(--color-cta);
        }
        /* FAQ */
        .faq-accordion-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-accordion-item:hover {
            border-color: rgba(255, 255, 255, 0.15);
        }
        .faq-accordion-btn {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            background: transparent;
            transition: background var(--transition-fast);
        }
        .faq-accordion-btn:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .faq-accordion-btn .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(5, 224, 201, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent);
            font-size: 14px;
            transition: transform var(--transition-fast);
        }
        .faq-accordion-btn[aria-expanded="true"] .faq-icon {
            transform: rotate(45deg);
        }
        .faq-accordion-body {
            padding: 0 22px 18px;
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.8;
            border-left: 3px solid var(--color-accent);
            margin-left: 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-accordion-body.show {
            max-height: 300px;
        }
        /* CTA Panel */
        .cta-panel {
            background: var(--gradient-brand);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }
        .cta-panel::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }
        .cta-panel .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-panel .cta-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-panel .cta-desc {
            color: rgba(255, 255, 255, 0.9);
            font-size: 16px;
            margin-bottom: 24px;
            max-width: 560px;
        }
        .cta-panel .btn-cta-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: var(--radius-pill);
            background: #fff;
            color: #7c3aed;
            font-weight: 700;
            font-size: 15px;
            transition: all var(--transition-fast);
        }
        .cta-panel .btn-cta-light:hover {
            transform: scale(1.04);
            box-shadow: 0 8px 22px rgba(0, 0, 0, 0.25);
            color: #7c3aed;
        }
        /* Footer */
        .footer {
            background: #0a0c11;
            border-top: 1px solid var(--color-border);
            padding: 56px 0 24px;
            position: relative;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-desc {
            color: var(--color-text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 300px;
        }
        .footer h5 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul li a {
            color: var(--color-text-muted);
            font-size: 14px;
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer-divider {
            border-top: 1px solid var(--color-border);
            margin: 32px 0 20px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        @media (max-width: 991px) {
            .topic-card-list {
                grid-template-columns: 1fr 1fr;
            }
            .contributor-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 767px) {
            .topic-card-list {
                grid-template-columns: 1fr;
            }
            .contributor-grid {
                grid-template-columns: 1fr;
            }
            .cta-panel {
                padding: 36px 24px;
            }
            .filter-sort-bar {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 6px;
            }
            .filter-btn {
                flex-shrink: 0;
            }
        }
        @media (max-width: 575px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .breadcrumb-wrapper {
                padding-top: 96px;
            }
            .category-header .category-h1 {
                font-size: 28px;
            }
            .topic-card-body {
                padding: 16px 18px 18px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}