/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2D1B69;
            --primary-light: #4A2D8A;
            --primary-dark: #1A0F3E;
            --primary-gradient: linear-gradient(135deg, #2D1B69 0%, #6C3FC6 100%);
            --accent: #FF6B35;
            --accent-light: #FF8F5E;
            --accent-gradient: linear-gradient(135deg, #FF6B35 0%, #FFB347 100%);
            --bg: #F8F7FC;
            --bg-white: #FFFFFF;
            --bg-dark: #1A1A2E;
            --bg-card: #FFFFFF;
            --text: #1A1A2E;
            --text-light: #6B6B7B;
            --text-muted: #9A9AB0;
            --text-white: #FFFFFF;
            --border: #E8E6F0;
            --border-light: #F0EEF5;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow: 0 4px 20px rgba(45, 27, 105, 0.08);
            --shadow-hover: 0 8px 40px rgba(45, 27, 105, 0.15);
            --shadow-lg: 0 12px 60px rgba(45, 27, 105, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --max-width-wide: 1400px;
            --header-height: 76px;
            --space-section: 100px;
            --space-section-mobile: 60px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-wide {
            max-width: var(--max-width-wide);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 通用板块标题 ===== */
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .subtitle {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(255, 107, 53, 0.1);
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 16px;
            }
            .section-header {
                margin-bottom: 36px;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--accent-gradient);
            color: #fff;
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(255, 107, 53, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 17px;
            border-radius: var(--radius-lg);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: rgba(255, 107, 53, 0.12);
            color: var(--accent);
        }
        .badge-primary {
            background: rgba(45, 27, 105, 0.1);
            color: var(--primary);
        }
        .badge-green {
            background: rgba(16, 185, 129, 0.12);
            color: #10B981;
        }
        .badge-blue {
            background: rgba(59, 130, 246, 0.12);
            color: #3B82F6;
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            transition: var(--transition);
        }
        .header.scrolled {
            box-shadow: var(--shadow);
            background: rgba(255, 255, 255, 0.96);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width-wide);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
        }
        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary-gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }
        .header-logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .header-nav a:hover {
            color: var(--primary);
            background: rgba(45, 27, 105, 0.05);
        }
        .header-nav a.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(45, 27, 105, 0.08);
        }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent-gradient);
            border-radius: 3px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-actions .search-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
            font-size: 16px;
        }
        .header-actions .search-btn:hover {
            background: var(--primary);
            color: #fff;
        }
        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--bg);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            border: 1px solid var(--border);
        }
        @media (max-width: 768px) {
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-100%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .header-nav a.active::after {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .header-actions .btn {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .hero {
            padding-top: var(--header-height);
            min-height: 85vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--primary-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 15, 62, 0.92) 0%, rgba(45, 27, 105, 0.7) 50%, rgba(108, 63, 198, 0.4) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 80px 0 100px;
        }
        .hero .container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .hero-text .hero-tag {
            display: inline-block;
            background: rgba(255, 107, 53, 0.2);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 107, 53, 0.2);
        }
        .hero-text h1 {
            font-size: 52px;
            font-weight: 900;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero-text h1 .highlight {
            background: var(--accent-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-text p {
            font-size: 19px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            max-width: 520px;
            margin-bottom: 32px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-visual .image-frame {
            position: relative;
            width: 100%;
            max-width: 500px;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: 0 20px 80px rgba(0, 0, 0, 0.3);
        }
        .hero-visual .image-frame img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .hero-visual .image-frame .play-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            padding: 10px 18px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 14px;
            font-weight: 500;
        }
        .hero-visual .image-frame .play-badge i {
            font-size: 20px;
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-text p {
                margin: 0 auto 32px;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-visual .image-frame {
                max-width: 400px;
                margin: 0 auto;
            }
            .hero-text h1 {
                font-size: 40px;
            }
        }
        @media (max-width: 768px) {
            .hero {
                min-height: auto;
            }
            .hero-content {
                padding: 40px 0 60px;
            }
            .hero-text h1 {
                font-size: 32px;
            }
            .hero-text p {
                font-size: 17px;
            }
            .hero-visual .image-frame img {
                height: 260px;
            }
        }
        @media (max-width: 520px) {
            .hero-text h1 {
                font-size: 26px;
            }
            .hero-buttons .btn-lg {
                padding: 12px 24px;
                font-size: 15px;
            }
        }

        /* ===== 特色/介绍板块 ===== */
        .section-about {
            padding: var(--space-section) 0;
            background: var(--bg-white);
        }
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .about-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .about-image .experience-badge {
            position: absolute;
            bottom: 24px;
            right: 24px;
            background: var(--primary);
            color: #fff;
            padding: 16px 24px;
            border-radius: var(--radius);
            text-align: center;
            box-shadow: 0 8px 32px rgba(45, 27, 105, 0.3);
        }
        .about-image .experience-badge .number {
            font-size: 32px;
            font-weight: 900;
            line-height: 1;
            display: block;
        }
        .about-image .experience-badge .label {
            font-size: 13px;
            opacity: 0.85;
            margin-top: 4px;
        }
        .about-text .subtitle {
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .about-text h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text);
        }
        .about-text p {
            color: var(--text-light);
            font-size: 17px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .about-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text);
            padding: 10px 16px;
            background: var(--bg);
            border-radius: var(--radius-sm);
        }
        .about-features li i {
            color: var(--accent);
            font-size: 16px;
        }
        @media (max-width: 768px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .about-image img {
                height: 280px;
            }
            .about-text h2 {
                font-size: 28px;
            }
            .about-features {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 分类入口 ===== */
        .section-categories {
            padding: var(--space-section) 0;
            background: var(--bg);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent-gradient);
            transform: scaleX(0);
            transform-origin: left;
            transition: var(--transition);
        }
        .category-card:hover::before {
            transform: scaleX(1);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .category-card .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: rgba(45, 27, 105, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 28px;
            color: var(--primary);
            transition: var(--transition);
        }
        .category-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
        }
        .category-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
        }
        .category-card .card-link i {
            transition: var(--transition);
        }
        .category-card:hover .card-link i {
            transform: translateX(4px);
        }

        /* ===== 最新资讯列表 (CMS) ===== */
        .section-latest {
            padding: var(--space-section) 0;
            background: var(--bg-white);
        }
        .latest-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 28px;
        }
        .latest-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .latest-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .latest-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--border);
        }
        .latest-card .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .latest-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .latest-card .card-meta .badge {
            font-size: 11px;
            padding: 3px 12px;
        }
        .latest-card .card-meta .date {
            font-size: 13px;
            color: var(--text-muted);
        }
        .latest-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .latest-card p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }
        .latest-card .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            margin-top: auto;
        }
        .latest-card .read-more i {
            transition: var(--transition);
        }
        .latest-card:hover .read-more i {
            transform: translateX(4px);
        }
        .latest-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            font-size: 16px;
            background: var(--bg);
            border-radius: var(--radius-lg);
        }
        .latest-empty i {
            font-size: 48px;
            color: var(--border);
            display: block;
            margin-bottom: 16px;
        }
        @media (max-width: 768px) {
            .latest-grid {
                grid-template-columns: 1fr;
            }
            .latest-card .card-img {
                height: 180px;
            }
        }

        /* ===== 热门推荐 ===== */
        .section-popular {
            padding: var(--space-section) 0;
            background: var(--bg);
        }
        .popular-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .popular-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            position: relative;
        }
        .popular-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .popular-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--border);
        }
        .popular-card .card-img-wrap {
            position: relative;
            overflow: hidden;
        }
        .popular-card .card-img-wrap .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.5) 0%, transparent 60%);
            opacity: 0;
            transition: var(--transition);
        }
        .popular-card:hover .card-img-wrap .overlay {
            opacity: 1;
        }
        .popular-card .card-img-wrap .rank-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
        }
        .popular-card .card-body {
            padding: 18px 20px 20px;
        }
        .popular-card .card-body h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .popular-card .card-body p {
            font-size: 13px;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .popular-card .card-body .tag-group {
            display: flex;
            gap: 6px;
            margin-top: 12px;
            flex-wrap: wrap;
        }
        .popular-card .card-body .tag-group .tag {
            font-size: 11px;
            padding: 2px 10px;
            border-radius: 12px;
            background: var(--bg);
            color: var(--text-light);
        }

        /* ===== 数据统计 ===== */
        .section-stats {
            padding: var(--space-section) 0;
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .section-stats::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .stats-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stats-item .number {
            font-size: 48px;
            font-weight: 900;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 8px;
        }
        .stats-item .number .plus {
            font-size: 28px;
            color: var(--accent);
        }
        .stats-item .label {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }
        .stats-item .icon {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 12px;
            opacity: 0.8;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .stats-item .number {
                font-size: 36px;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-item .number {
                font-size: 30px;
            }
        }

        /* ===== FAQ ===== */
        .section-faq {
            padding: var(--space-section) 0;
            background: var(--bg-white);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item.active {
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: none;
            text-align: left;
        }
        .faq-question .icon {
            font-size: 18px;
            color: var(--accent);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer p {
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .section-cta {
            padding: var(--space-section) 0;
            background: var(--bg);
            position: relative;
        }
        .cta-box {
            background: var(--primary-gradient);
            border-radius: var(--radius-xl);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 80px rgba(45, 27, 105, 0.2);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-box h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        .cta-box .btn-white:hover {
            background: var(--accent);
            color: #fff;
        }
        .cta-box .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 28px;
            }
            .cta-box p {
                font-size: 16px;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent-gradient);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-brand .social-links {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-brand .social-links a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-brand .social-links a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 分隔线间距 ===== */
        .section-divider {
            height: 1px;
            background: var(--border);
            max-width: var(--max-width);
            margin: 0 auto;
        }

        /* ===== 响应式通用 ===== */
        @media (max-width: 1024px) {
            :root {
                --space-section: 80px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space-section: 60px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --space-section: 48px;
            }
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-mid: #0f3460;
            --secondary: #e94560;
            --accent: #f5a623;
            --accent-light: #ffd166;
            --bg: #f4f5f7;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text: #2d3436;
            --text-light: #636e72;
            --text-lighter: #b2bec3;
            --text-white: #ffffff;
            --border: #e8e8ec;
            --border-light: #f0f0f5;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(26, 26, 46, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 26, 46, 0.16);
            --shadow-banner: 0 8px 32px rgba(0, 0, 0, 0.3);
            --transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 70px;
            --nav-gap: 32px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }

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

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

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .header .logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: var(--nav-gap);
        }
        .header-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .header-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--secondary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .header-nav a:hover {
            color: var(--primary);
        }
        .header-nav a:hover::after {
            width: 100%;
        }
        .header-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .header-nav a.active::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-actions .search-toggle {
            font-size: 18px;
            color: var(--text-light);
            padding: 8px;
            border-radius: 50%;
            transition: var(--transition);
        }
        .header-actions .search-toggle:hover {
            color: var(--primary);
            background: var(--border-light);
        }
        .header-actions .btn-nav-cta {
            background: var(--secondary);
            color: #fff;
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(233, 69, 96, 0.3);
        }
        .header-actions .btn-nav-cta:hover {
            background: #d1344f;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
            color: #fff;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero Banner ===== */
        .category-hero {
            margin-top: var(--header-height);
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.85), rgba(15, 52, 96, 0.75)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            color: var(--text-white);
            padding: 80px 24px 60px;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(233, 69, 96, 0.2), transparent 70%);
            pointer-events: none;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 1px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            margin-bottom: 20px;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            background: linear-gradient(to right, #fff, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 580px;
            margin: 0 auto 28px;
            line-height: 1.6;
        }
        .category-hero .hero-search {
            display: flex;
            max-width: 480px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            overflow: hidden;
            padding: 4px;
        }
        .category-hero .hero-search input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            color: #fff;
            font-size: 15px;
        }
        .category-hero .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }
        .category-hero .hero-search button {
            background: var(--secondary);
            color: #fff;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        .category-hero .hero-search button:hover {
            background: #d1344f;
        }

        /* ===== Section common ===== */
        .section {
            padding: 72px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 540px;
            margin: 0 auto;
        }
        .section-header .section-tag {
            display: inline-block;
            background: var(--secondary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }
        .section-header .section-line {
            width: 60px;
            height: 4px;
            background: linear-gradient(to right, var(--secondary), var(--accent));
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Tags filter ===== */
        .tags-filter {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: -20px;
            margin-bottom: 48px;
            position: relative;
            z-index: 3;
        }
        .tags-filter .tag-item {
            padding: 8px 22px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            cursor: pointer;
            box-shadow: var(--shadow);
        }
        .tags-filter .tag-item:hover,
        .tags-filter .tag-item.active {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(233, 69, 96, 0.25);
        }

        /* ===== Article Card Grid ===== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .article-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .article-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .article-card:hover .card-img img {
            transform: scale(1.06);
        }
        .article-card .card-img .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--secondary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .article-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-lighter);
            margin-bottom: 10px;
        }
        .article-card .card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-card .card-meta .meta-cat {
            color: var(--secondary);
            font-weight: 500;
        }
        .article-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.4;
            margin-bottom: 10px;
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card:hover .card-title {
            color: var(--secondary);
        }
        .article-card .card-excerpt {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .article-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }
        .article-card .card-footer .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .article-card .card-footer .read-more:hover {
            gap: 12px;
        }
        .article-card .card-footer .card-stats {
            display: flex;
            gap: 12px;
            font-size: 13px;
            color: var(--text-lighter);
        }
        .article-card .card-footer .card-stats span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== Hot Rank ===== */
        .hot-rank-section {
            background: var(--bg-white);
        }
        .hot-rank-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .hot-rank-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .hot-rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 20px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            cursor: pointer;
            border-bottom: 1px solid var(--border-light);
        }
        .hot-rank-item:last-child {
            border-bottom: none;
        }
        .hot-rank-item:hover {
            background: var(--bg);
            transform: translateX(6px);
        }
        .hot-rank-item .rank-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 800;
            color: var(--text-lighter);
            background: var(--bg);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .hot-rank-item:nth-child(1) .rank-num {
            background: var(--secondary);
            color: #fff;
        }
        .hot-rank-item:nth-child(2) .rank-num {
            background: var(--accent);
            color: #fff;
        }
        .hot-rank-item:nth-child(3) .rank-num {
            background: var(--primary-mid);
            color: #fff;
        }
        .hot-rank-item:nth-child(4) .rank-num {
            background: #6c5ce7;
            color: #fff;
        }
        .hot-rank-item:nth-child(5) .rank-num {
            background: #00b894;
            color: #fff;
        }
        .hot-rank-item .rank-info {
            flex: 1;
        }
        .hot-rank-item .rank-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .hot-rank-item .rank-info .rank-meta {
            font-size: 13px;
            color: var(--text-lighter);
        }
        .hot-rank-item .rank-hotness {
            font-size: 13px;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(233, 69, 96, 0.08);
            padding: 4px 14px;
            border-radius: 20px;
            white-space: nowrap;
        }
        .hot-rank-featured {
            background: linear-gradient(135deg, var(--primary), var(--primary-mid));
            border-radius: var(--radius);
            padding: 32px 28px;
            color: var(--text-white);
            min-height: 360px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .hot-rank-featured .feat-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 16px;
            width: fit-content;
        }
        .hot-rank-featured h3 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .hot-rank-featured p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .hot-rank-featured .btn-feat {
            background: var(--secondary);
            color: #fff;
            padding: 10px 26px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 14px;
            width: fit-content;
            transition: var(--transition);
        }
        .hot-rank-featured .btn-feat:hover {
            background: #d1344f;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(233, 69, 96, 0.3);
            color: #fff;
        }

        /* ===== Featured Topics ===== */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .topic-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            height: 320px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .topic-card .topic-bg {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .topic-card:hover .topic-bg {
            transform: scale(1.06);
        }
        .topic-card .topic-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(26, 26, 46, 0.85) 0%, rgba(26, 26, 46, 0.2) 60%, transparent 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 28px 24px;
        }
        .topic-card .topic-overlay .topic-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 12px;
            width: fit-content;
        }
        .topic-card .topic-overlay h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .topic-card .topic-overlay p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-mid));
            padding: 80px 0;
            text-align: center;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(233, 69, 96, 0.2), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 32px;
        }
        .cta-form {
            display: flex;
            max-width: 480px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            overflow: hidden;
            padding: 4px;
        }
        .cta-form input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            color: #fff;
            font-size: 15px;
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.55);
        }
        .cta-form button {
            background: var(--secondary);
            color: #fff;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .cta-form button:hover {
            background: #d1344f;
            transform: scale(1.02);
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-item .faq-question i {
            font-size: 14px;
            color: var(--text-lighter);
            transition: var(--transition);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 24px 20px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 30px;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }
        .footer .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 18px;
            max-width: 360px;
        }
        .footer .social-links {
            display: flex;
            gap: 12px;
        }
        .footer .social-links a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer .social-links a:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer .footer-col ul li a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer .footer-bottom span:last-child a {
            margin: 0 4px;
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 16px rgba(233, 69, 96, 0.3);
            z-index: 999;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: #d1344f;
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(233, 69, 96, 0.4);
            color: #fff;
        }

        /* ===== Load More ===== */
        .load-more-wrap {
            text-align: center;
            margin-top: 40px;
        }
        .load-more-wrap .btn-load {
            background: var(--bg-white);
            border: 2px solid var(--border);
            padding: 12px 40px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-light);
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .load-more-wrap .btn-load:hover {
            border-color: var(--secondary);
            color: var(--secondary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hot-rank-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hot-rank-featured {
                min-height: auto;
                padding: 28px 24px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 62px;
                --nav-gap: 20px;
            }
            .header .logo {
                font-size: 18px;
            }
            .header .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .header-nav {
                gap: 16px;
            }
            .header-nav a {
                font-size: 14px;
            }
            .header-actions .btn-nav-cta {
                padding: 6px 16px;
                font-size: 13px;
            }
            .hamburger {
                display: flex;
            }
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
                z-index: 999;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .header-nav a {
                font-size: 16px;
                padding: 8px 0;
                width: 100%;
                text-align: center;
            }
            .header-nav a::after {
                bottom: 0;
            }

            .category-hero {
                min-height: 320px;
                padding: 60px 20px 50px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .category-hero .hero-search {
                flex-direction: column;
                background: transparent;
                border: none;
                gap: 10px;
                padding: 0;
            }
            .category-hero .hero-search input {
                background: rgba(255, 255, 255, 0.12);
                border-radius: 50px;
                border: 1px solid rgba(255, 255, 255, 0.15);
                padding: 12px 18px;
            }
            .category-hero .hero-search button {
                width: 100%;
                padding: 12px;
            }

            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .topics-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .topic-card {
                height: 240px;
            }
            .tags-filter {
                gap: 8px;
                margin-top: -12px;
                margin-bottom: 28px;
            }
            .tags-filter .tag-item {
                font-size: 13px;
                padding: 6px 16px;
            }
            .hot-rank-item {
                padding: 14px 12px;
                gap: 14px;
            }
            .hot-rank-item .rank-info h4 {
                font-size: 15px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-form {
                flex-direction: column;
                background: transparent;
                border: none;
                gap: 10px;
                padding: 0;
            }
            .cta-form input {
                background: rgba(255, 255, 255, 0.12);
                border-radius: 50px;
                border: 1px solid rgba(255, 255, 255, 0.15);
                padding: 12px 18px;
            }
            .cta-form button {
                width: 100%;
                padding: 12px;
            }
            .faq-item .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .footer {
                padding: 40px 0 24px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-brand p {
                max-width: 100%;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .article-card .card-body {
                padding: 16px 18px 20px;
            }
            .article-card .card-title {
                font-size: 16px;
            }
            .hot-rank-item .rank-hotness {
                font-size: 12px;
                padding: 3px 10px;
            }
            .hot-rank-featured {
                padding: 24px 20px;
            }
            .hot-rank-featured h3 {
                font-size: 20px;
            }
            .topic-card .topic-overlay {
                padding: 20px 18px;
            }
            .topic-card .topic-overlay h3 {
                font-size: 18px;
            }
            .footer .footer-grid {
                gap: 24px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6C3AFF;
            --primary-dark: #5228CC;
            --primary-light: #8B6BFF;
            --primary-bg: #F3EEFF;
            --secondary: #FF6B6B;
            --accent: #FFD93D;
            --accent-dark: #E6C233;
            --bg: #FFFFFF;
            --bg-alt: #F8F7FC;
            --bg-dark: #1A1A2E;
            --bg-card: #FFFFFF;
            --text: #1E1E2E;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --border: #E5E7EB;
            --border-light: #F3F4F6;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 8px 32px rgba(108,58,255,0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --content-width: 800px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
        }
        .logo span:last-child { background: linear-gradient(135deg, var(--text), var(--primary-dark)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-nav a {
            padding: 8px 20px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .header-nav a:hover { color: var(--primary); background: var(--primary-bg); }
        .header-nav a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 4px 16px rgba(108,58,255,0.30);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-toggle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: none;
            background: var(--bg-alt);
            color: var(--text-light);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
            font-size: 16px;
        }
        .search-toggle:hover { background: var(--primary-bg); color: var(--primary); }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-xs);
            border: none;
            background: var(--bg-alt);
            color: var(--text);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            transition: all var(--transition);
        }
        .menu-toggle:hover { background: var(--primary-bg); color: var(--primary); }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 20px 0 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-muted); }
        .breadcrumb .sep { margin: 0 8px; }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 40px 0 48px;
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border-light);
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }
        .article-hero .container-narrow { position: relative; z-index: 1; }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            margin-bottom: 20px;
            font-size: 14px;
            color: var(--text-light);
        }
        .article-meta .category-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 100px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .article-meta .date { display: flex; align-items: center; gap: 6px; }
        .article-meta .date i { font-size: 14px; }
        .article-hero h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: var(--text);
        }
        .article-hero .excerpt {
            font-size: 18px;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 90%;
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body p { margin-bottom: 1.5em; }
        .article-body h2, .article-body h3, .article-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: var(--text);
        }
        .article-body h2 { font-size: 26px; }
        .article-body h3 { font-size: 22px; }
        .article-body img {
            border-radius: var(--radius);
            margin: 1.8em 0;
            box-shadow: var(--shadow);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body ul, .article-body ol {
            margin: 1em 0;
            padding-left: 24px;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5em; }
        .article-body a { text-decoration: underline; text-underline-offset: 3px; }
        .article-body code {
            background: var(--bg-alt);
            padding: 2px 8px;
            border-radius: var(--radius-xs);
            font-size: 0.9em;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
        }

        /* ===== Tags & Share ===== */
        .article-tags-share {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 32px 0 8px;
            border-top: 1px solid var(--border-light);
            margin-top: 32px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 100px;
            background: var(--bg-alt);
            color: var(--text-light);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }
        .share-links {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .share-links span { font-size: 14px; color: var(--text-light); font-weight: 500; }
        .share-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            border: none;
            background: var(--bg-alt);
            color: var(--text-light);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
            font-size: 15px;
        }
        .share-btn:hover { background: var(--primary-bg); color: var(--primary); transform: translateY(-2px); }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 64px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .related-section .section-sub {
            color: var(--text-light);
            margin-bottom: 36px;
            font-size: 16px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-bg);
        }
        .related-card .card-img {
            aspect-ratio: 16 / 10;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .card-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 100px;
            background: rgba(108,58,255,0.90);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .related-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a { color: var(--text); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
            flex: 1;
        }
        .related-card .card-body .card-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #2D1B69 100%);
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: 100px;
            background: var(--accent);
            color: var(--bg-dark);
            font-size: 17px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }
        .cta-btn:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(255,217,61,0.35); color: var(--bg-dark); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand .logo span:last-child { background: linear-gradient(135deg, #fff, #c4b5fd); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
        .social-links { display: flex; gap: 12px; margin-top: 20px; }
        .social-links a {
            width: 38px; height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
            font-size: 16px;
        }
        .social-links a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li { margin-bottom: 12px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 14px;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            gap: 12px;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: #fff; }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box .nf-icon {
            font-size: 56px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 28px;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 28px;
            font-size: 16px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 100px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .not-found-box .btn-home:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(108,58,255,0.30); color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-hero h1 { font-size: 30px; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
            .header-nav { display: none; }
            .menu-toggle { display: flex; }
            .header-nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                padding: 16px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
            }
            .header-nav.open a { width: 100%; text-align: center; padding: 12px 20px; }
            .article-hero { padding: 24px 0 32px; }
            .article-hero h1 { font-size: 24px; }
            .article-hero .excerpt { font-size: 16px; max-width: 100%; }
            .article-meta { gap: 10px 16px; font-size: 13px; }
            .article-body { font-size: 16px; }
            .related-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 26px; }
            .cta-section p { font-size: 15px; }
            .article-tags-share { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            :root { --nav-height: 60px; }
            .logo { font-size: 18px; }
            .logo .logo-icon { width: 34px; height: 34px; font-size: 15px; }
            .article-hero h1 { font-size: 20px; }
            .article-body h2 { font-size: 22px; }
            .article-body h3 { font-size: 19px; }
            .related-section .section-title { font-size: 22px; }
            .cta-section { padding: 48px 0; }
            .cta-btn { padding: 12px 28px; font-size: 15px; }
            .breadcrumb { font-size: 12px; padding: 12px 0 0; }
            .article-main { padding: 28px 0 40px; }
            .related-section { padding: 40px 0; }
            .not-found-box { padding: 48px 16px; }
            .not-found-box .nf-icon { font-size: 40px; }
        }

        /* ===== Mobile Menu Overlay ===== */
        .mobile-menu-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 99;
        }
        .mobile-menu-overlay.open { display: block; }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }