/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #8B7CF5;
            --primary-gradient: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 100%);
            --secondary: #00CEC9;
            --secondary-dark: #00B5B0;
            --accent: #FD79A8;
            --accent-light: #FDCB6E;
            --bg-dark: #0F0E17;
            --bg-section: #1A1932;
            --bg-card: #232146;
            --bg-card-hover: #2D2B54;
            --bg-light: #F8F7FF;
            --text-primary: #FFFFFF;
            --text-secondary: #E0DFF5;
            --text-muted: #9D9BBF;
            --text-dark: #2D2B54;
            --border-color: rgba(108, 92, 231, 0.2);
            --border-light: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.2);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --container-max: 1200px;
            --nav-height: 70px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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-primary);
            background-color: var(--bg-dark);
            overflow-x: hidden;
        }

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

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            width: 100%;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 0;
            background: transparent;
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(15, 14, 23, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 8px 0;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

        .nav-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-brand i {
            font-size: 1.8rem;
            -webkit-text-fill-color: initial;
            color: var(--secondary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(255, 255, 255, 0.05);
            padding: 4px;
            border-radius: 50px;
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-light);
        }

        .nav-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }

        .nav-list a i {
            font-size: 0.85rem;
        }

        .nav-list a:hover,
        .nav-list a.active {
            color: var(--text-primary);
            background: var(--primary-gradient);
            box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 40px;
            padding: 6px 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            min-width: 180px;
        }

        .nav-search:focus-within {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.1);
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.15);
        }

        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 8px;
        }

        .nav-search input {
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 0.85rem;
            width: 100%;
            padding: 6px 0;
        }

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            border: 1px solid var(--border-light);
        }

        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            overflow: hidden;
            padding-top: var(--nav-height);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 14, 23, 0.9) 0%, rgba(26, 25, 50, 0.7) 50%, rgba(15, 14, 23, 0.9) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
            align-items: center;
            padding-top: var(--spacing-lg);
            padding-bottom: var(--spacing-lg);
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 1.2rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content .subtitle {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: 0.8rem;
            font-weight: 400;
        }

        .hero-content .desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 2rem;
            max-width: 520px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 2rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(108, 92, 231, 0.15);
            border: 1px solid rgba(108, 92, 231, 0.25);
            color: var(--text-secondary);
        }

        .hero-badge i {
            color: var(--secondary);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.5);
            color: #fff;
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(10px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            color: var(--text-primary);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-visual .mockup {
            width: 100%;
            max-width: 520px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg), var(--shadow-glow);
            border: 1px solid rgba(108, 92, 231, 0.15);
            transition: var(--transition);
        }

        .hero-visual .mockup:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-lg), 0 0 50px rgba(108, 92, 231, 0.2);
        }

        .floating-tag {
            position: absolute;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 40px;
            background: rgba(26, 25, 50, 0.92);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-secondary);
            animation: float 3s ease-in-out infinite;
            box-shadow: var(--shadow-sm);
        }

        .floating-tag i {
            color: var(--secondary);
        }

        .floating-tag.top-right {
            top: 10%;
            right: -5%;
            animation-delay: 0.5s;
        }

        .floating-tag.bottom-left {
            bottom: 15%;
            left: -8%;
            animation-delay: 1.5s;
        }

        @keyframes float {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-12px);
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-xl) 0;
            position: relative;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-lg);
        }

        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 0.8rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-header p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            background: rgba(108, 92, 231, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(108, 92, 231, 0.2);
            margin-bottom: 1rem;
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

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

        .feature-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108, 92, 231, 0.3);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(108, 92, 231, 0.15);
            font-size: 1.5rem;
            color: var(--secondary);
            margin-bottom: 1.2rem;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--primary-gradient);
            color: #fff;
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
            aspect-ratio: 4/3;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 24px;
        }

        .category-card .cat-bg {
            position: absolute;
            inset: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            opacity: 0.3;
            transition: var(--transition);
        }

        .category-card:hover .cat-bg {
            opacity: 0.5;
            transform: scale(1.05);
        }

        .category-card .cat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 14, 23, 0.9) 0%, rgba(15, 14, 23, 0.3) 100%);
            z-index: 1;
        }

        .category-card>*:not(.cat-bg):not(.cat-overlay) {
            position: relative;
            z-index: 2;
        }

        .category-card .cat-icon {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .category-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .category-card .cat-count {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108, 92, 231, 0.3);
        }

        /* ===== 热门推荐 / 卡片列表 ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108, 92, 231, 0.3);
        }

        .content-card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .content-card .card-body {
            padding: 20px 24px 24px;
        }

        .content-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 206, 201, 0.12);
            color: var(--secondary);
            margin-bottom: 10px;
            border: 1px solid rgba(0, 206, 201, 0.15);
        }

        .content-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .content-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .content-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .content-card .card-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .stat-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-card .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-card .stat-label {
            font-size: 1rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.3;
            z-index: 0;
        }

        .step-card {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .step-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-number {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
        }

        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ===== 最新资讯 / CMS 列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .news-item:hover {
            background: var(--bg-card-hover);
            transform: translateX(4px);
            border-color: rgba(108, 92, 231, 0.2);
        }

        .news-item .news-thumb {
            width: 120px;
            min-height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }

        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-item .news-cat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: 40px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(108, 92, 231, 0.12);
            color: var(--primary-light);
            border: 1px solid rgba(108, 92, 231, 0.15);
            margin-bottom: 6px;
        }

        .news-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }

        .news-item .news-time {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-item .news-time i {
            color: var(--primary-light);
        }

        .empty-news {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-color);
        }

        .empty-news i {
            font-size: 2.5rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.2);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--secondary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

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

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: var(--spacing-lg) var(--spacing-md);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(108, 92, 231, 0.2);
            box-shadow: var(--shadow-lg);
            max-width: 900px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .cta-box p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-light);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: var(--spacing-lg);
        }

        .footer-brand .nav-brand {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

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

        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }

        .footer-col ul li a i {
            font-size: 0.7rem;
            color: var(--secondary);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-light);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

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

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

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary-gradient);
            color: #fff;
            border-color: transparent;
            transform: translateY(-3px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .hero-content .desc {
                margin: 0 auto 2rem;
            }
            .hero-badges {
                justify-content: center;
            }
            .hero-actions {
                justify-content: center;
            }

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

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

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

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

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid::before {
                display: none;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .floating-tag {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-xl: 4rem;
                --spacing-lg: 3rem;
                --spacing-md: 1.5rem;
            }

            .nav-list {
                display: none;
                position: absolute;
                top: calc(var(--nav-height) + 8px);
                left: var(--spacing-md);
                right: var(--spacing-md);
                background: rgba(15, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-md);
                flex-direction: column;
                padding: 12px;
                border: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
            }

            .nav-list.open {
                display: flex;
            }

            .nav-list a {
                padding: 14px 20px;
                border-radius: var(--radius-sm);
                width: 100%;
            }

            .nav-search {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .hero-content h1 {
                font-size: 2.2rem;
            }

            .hero-content .subtitle {
                font-size: 1rem;
            }

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

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

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

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

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

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

            .news-item {
                flex-direction: column;
            }

            .news-item .news-thumb {
                width: 100%;
                height: 160px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

            .cta-box h2 {
                font-size: 1.6rem;
            }

            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }

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

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

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

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

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

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-light);
        }

        /* ===== 选中样式 ===== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

/* roulang page: article */
/* ==================== 设计变量 ==================== */
        :root {
            --primary: #6C3CE1;
            --primary-light: #8B5CF6;
            --primary-dark: #4F29A8;
            --primary-gradient: linear-gradient(135deg, #6C3CE1, #E040FB);
            --secondary: #FF6B35;
            --secondary-light: #FF8A5C;
            --accent: #00D4AA;
            --accent-dark: #00B894;
            --bg-body: #0B0E1A;
            --bg-card: #141829;
            --bg-card-hover: #1C2035;
            --bg-elevated: #1E2338;
            --bg-nav: rgba(11, 14, 26, 0.85);
            --text-primary: #F1F3F9;
            --text-secondary: #A0A7C0;
            --text-muted: #6B7294;
            --text-inverse: #0B0E1A;
            --border-color: rgba(108, 60, 225, 0.25);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 30px rgba(108, 60, 225, 0.15);
            --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

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

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ==================== 导航 ==================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: var(--bg-nav);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

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

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .nav-brand i {
            font-size: 1.6rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-brand:hover {
            color: var(--primary-light);
            transform: scale(1.02);
        }
        .nav-brand:hover i {
            -webkit-text-fill-color: var(--secondary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(255, 255, 255, 0.04);
            padding: 4px;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
        }

        .nav-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-xl);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a i {
            font-size: 0.95rem;
            opacity: 0.7;
        }
        .nav-list a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list a.active {
            color: #fff;
            background: var(--primary-gradient);
            box-shadow: 0 4px 20px rgba(108, 60, 225, 0.4);
        }
        .nav-list a.active i {
            opacity: 1;
        }

        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            background: none;
            border: none;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        /* ==================== 移动端导航 ==================== */
        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 12px;
                right: 12px;
                flex-direction: column;
                background: var(--bg-elevated);
                border: 1px solid var(--border-color);
                border-radius: var(--radius-md);
                padding: 12px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                backdrop-filter: blur(20px);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                justify-content: center;
                padding: 14px 20px;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: block;
            }
            :root {
                --header-height: 64px;
            }
            .nav-brand {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .nav-list a {
                font-size: 0.9rem;
                padding: 12px 16px;
            }
            .nav-brand i {
                font-size: 1.3rem;
            }
        }

        /* ==================== 文章页 ==================== */
        .article-page {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 80px;
        }

        .article-banner {
            position: relative;
            height: 360px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 48px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
        }
        .article-banner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .article-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 14, 26, 0.92) 0%, rgba(11, 14, 26, 0.3) 60%, rgba(11, 14, 26, 0.1) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 40px 48px;
        }
        .article-banner .banner-category {
            display: inline-block;
            padding: 6px 18px;
            background: var(--primary-gradient);
            border-radius: var(--radius-xl);
            font-size: 0.85rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            width: fit-content;
            box-shadow: 0 4px 16px rgba(108, 60, 225, 0.35);
        }
        .article-banner .banner-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 720px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
        }
        .article-banner .banner-meta {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-top: 16px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .article-banner .banner-meta i {
            margin-right: 6px;
        }

        @media (max-width: 768px) {
            .article-banner {
                height: 280px;
                border-radius: var(--radius-md);
            }
            .article-banner .banner-overlay {
                padding: 24px 20px;
            }
            .article-banner .banner-title {
                font-size: 1.5rem;
            }
            .article-banner .banner-meta {
                flex-wrap: wrap;
                gap: 12px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .article-banner {
                height: 220px;
            }
            .article-banner .banner-title {
                font-size: 1.2rem;
            }
            .article-banner .banner-overlay {
                padding: 16px;
            }
        }

        /* ==================== 面包屑 ==================== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px 16px;
            padding: 16px 0 32px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 500;
            max-width: 360px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ==================== 文章正文 ==================== */
        .article-content {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 48px 56px;
            line-height: 1.9;
            color: var(--text-secondary);
            font-size: 1.05rem;
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 16px;
        }
        .article-content h2 {
            font-size: 1.6rem;
            border-left: 4px solid var(--primary);
            padding-left: 16px;
        }
        .article-content h3 {
            font-size: 1.3rem;
        }
        .article-content p {
            margin-bottom: 20px;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--secondary);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(108, 60, 225, 0.08);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 32px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content code {
            background: rgba(108, 60, 225, 0.12);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent);
        }
        .article-content pre {
            background: var(--bg-elevated);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 24px;
            overflow-x: auto;
            margin: 24px 0;
        }
        .article-content pre code {
            background: none;
            padding: 0;
            color: var(--text-primary);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .article-content th {
            background: var(--primary);
            color: #fff;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-content td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-light);
        }
        .article-content tr:nth-child(even) td {
            background: rgba(255, 255, 255, 0.02);
        }

        @media (max-width: 768px) {
            .article-content {
                padding: 28px 20px;
                font-size: 0.95rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
        }
        @media (max-width: 520px) {
            .article-content {
                padding: 20px 16px;
                border-radius: var(--radius-sm);
            }
        }

        /* ==================== 文章底部 ==================== */
        .article-footer {
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(108, 60, 225, 0.12);
            border: 1px solid rgba(108, 60, 225, 0.2);
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .article-share span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card-hover);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .article-share a:hover {
            background: var(--primary-gradient);
            color: #fff;
            border-color: transparent;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108, 60, 225, 0.3);
        }

        @media (max-width: 520px) {
            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ==================== 内容未找到 ==================== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            display: block;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary-gradient);
            color: #fff;
            border-radius: var(--radius-xl);
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(108, 60, 225, 0.35);
            color: #fff;
        }

        /* ==================== 相关内容 ==================== */
        .related-section {
            margin-top: 64px;
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i {
            color: var(--primary-light);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .related-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .related-card .card-body .meta i {
            margin-right: 4px;
        }

        @media (max-width: 992px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card .card-img {
                height: 160px;
            }
        }

        /* ==================== 按钮通用 ==================== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            border-radius: var(--radius-xl);
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-size: 0.95rem;
        }
        .btn-primary {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 60, 225, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(108, 60, 225, 0.45);
            color: #fff;
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            border: 1px solid var(--border-light);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 32px;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-light);
        }

        .footer-brand .nav-brand {
            font-size: 1.3rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-col ul li a i {
            font-size: 0.65rem;
            opacity: 0.5;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 32px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .footer-social a:hover {
            background: var(--primary-gradient);
            color: #fff;
            border-color: transparent;
            transform: translateY(-2px);
        }

        @media (max-width: 992px) {
            .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;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
        }

        /* ==================== 通用工具 ==================== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ==================== 滚动条 ==================== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-dark);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

        /* ==================== 选中颜色 ==================== */
        ::selection {
            background: rgba(108, 60, 225, 0.4);
            color: #fff;
        }

        /* ==================== 响应式微调 ==================== */
        @media (max-width: 768px) {
            .article-page {
                padding-top: calc(var(--header-height) + 24px);
                padding-bottom: 48px;
            }
            .related-section .section-title {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .breadcrumb {
                font-size: 0.8rem;
                padding: 12px 0 20px;
            }
            .breadcrumb .current {
                max-width: 200px;
            }
        }

/* roulang page: category1 */
/* ==================== 设计变量 ==================== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --secondary: #FD79A8;
            --secondary-dark: #E84393;
            --accent: #00CEC9;
            --bg-body: #F5F6FA;
            --bg-white: #FFFFFF;
            --bg-card: #FFFFFF;
            --bg-dark: #2D3436;
            --bg-footer: #1E272E;
            --text-primary: #2D3436;
            --text-secondary: #636E72;
            --text-light: #B2BEC3;
            --text-white: #FFFFFF;
            --border-color: #E8E8EC;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 50px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-glow: 0 0 30px rgba(108,92,231,0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-w: 1200px;
            --nav-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ==================== 基础 Reset ==================== */
        *, *::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-primary);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; transition: var(--transition); }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ==================== 导航 - 悬浮胶囊风格 ==================== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            padding: 0 20px;
            pointer-events: none;
        }
        .site-header .nav-inner {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-w);
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(18px) saturate(180%);
            -webkit-backdrop-filter: blur(18px) saturate(180%);
            border-radius: var(--radius-pill);
            padding: 0 28px;
            height: var(--nav-height);
            box-shadow: 0 4px 24px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.03);
            border: 1px solid rgba(255,255,255,0.5);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .nav-brand i { font-size: 1.6rem; color: var(--secondary); }
        .nav-brand:hover { color: var(--primary-dark); transform: scale(1.02); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-list a i { font-size: 1rem; }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(108,92,231,0.08);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(108,92,231,0.35);
        }
        .nav-list a.active:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(108,92,231,0.45);
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.6);
        }
        .nav-toggle:hover { background: rgba(108,92,231,0.1); color: var(--primary); }

        /* 移动端导航 */
        @media (max-width: 768px) {
            .site-header { top: 12px; padding: 0 12px; }
            .site-header .nav-inner { padding: 0 16px; height: 60px; border-radius: var(--radius-lg); }
            .nav-brand { font-size: 1.1rem; }
            .nav-brand i { font-size: 1.3rem; }
            .nav-list {
                position: fixed;
                top: 80px;
                left: 12px;
                right: 12px;
                flex-direction: column;
                background: rgba(255,255,255,0.96);
                backdrop-filter: blur(20px);
                border-radius: var(--radius-lg);
                padding: 12px;
                box-shadow: var(--shadow-lg);
                border: 1px solid rgba(255,255,255,0.6);
                display: none;
                gap: 4px;
            }
            .nav-list.open { display: flex; }
            .nav-list a {
                width: 100%;
                justify-content: flex-start;
                padding: 12px 18px;
                border-radius: var(--radius-md);
                font-size: 1rem;
            }
            .nav-toggle { display: block; }
        }
        @media (max-width: 520px) {
            .site-header .nav-inner { height: 54px; padding: 0 12px; }
            .nav-brand { font-size: 0.95rem; gap: 6px; }
            .nav-brand i { font-size: 1.1rem; }
            .nav-list { top: 72px; left: 8px; right: 8px; padding: 10px; }
            .nav-list a { padding: 10px 14px; font-size: 0.92rem; }
        }

        /* ==================== Banner 分类首屏 ==================== */
        .category-banner {
            position: relative;
            margin-top: 60px;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, #2D1B69 0%, #6C5CE7 50%, #A29BFE 100%);
            overflow: hidden;
            min-height: 400px;
            display: flex;
            align-items: center;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(253,121,168,0.3) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 50%, rgba(0,206,201,0.2) 0%, transparent 60%);
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.18);
            backdrop-filter: blur(6px);
            padding: 8px 20px;
            border-radius: var(--radius-pill);
            color: var(--text-white);
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .banner-badge i { color: var(--secondary); font-size: 1rem; }
        .category-banner h1 {
            color: var(--text-white);
            font-size: 3.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .category-banner p {
            color: rgba(255,255,255,0.85);
            font-size: 1.2rem;
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .banner-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .banner-stats .stat-item {
            text-align: center;
            color: var(--text-white);
        }
        .banner-stats .stat-item .num {
            font-size: 2.2rem;
            font-weight: 800;
            display: block;
            line-height: 1.2;
            text-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .banner-stats .stat-item .label {
            font-size: 0.9rem;
            opacity: 0.8;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .category-banner { padding: 100px 0 70px; margin-top: 50px; min-height: 320px; }
            .category-banner h1 { font-size: 2.2rem; }
            .category-banner p { font-size: 1rem; }
            .banner-stats { gap: 28px; }
            .banner-stats .stat-item .num { font-size: 1.8rem; }
        }
        @media (max-width: 520px) {
            .category-banner { padding: 80px 0 50px; margin-top: 40px; min-height: 280px; }
            .category-banner h1 { font-size: 1.7rem; }
            .category-banner p { font-size: 0.9rem; }
            .banner-stats { gap: 20px; }
            .banner-stats .stat-item .num { font-size: 1.4rem; }
            .banner-stats .stat-item .label { font-size: 0.8rem; }
            .banner-badge { font-size: 0.8rem; padding: 6px 14px; }
        }

        /* ==================== 通用板块 ==================== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: var(--text-white);
        }
        .section-dark p { color: rgba(255,255,255,0.7); }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-block);
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .tagline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(108,92,231,0.1);
            color: var(--primary);
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .section-header .tagline i { font-size: 0.8rem; }

        @media (max-width: 768px) {
            .section { --spacing-section: 56px; --spacing-block: 36px; }
            .section-header h2 { font-size: 1.7rem; }
            .section-subtitle { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .section { --spacing-section: 40px; --spacing-block: 28px; }
            .section-header h2 { font-size: 1.4rem; }
            .section-subtitle { font-size: 0.9rem; }
        }

        /* ==================== 分类概览 - 标签云 ==================== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 8px;
        }
        .tag-cloud .tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-pill);
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .tag-cloud .tag i { color: var(--primary); font-size: 0.9rem; }
        .tag-cloud .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(108,92,231,0.25);
        }
        .tag-cloud .tag:hover i { color: var(--text-white); }
        .tag-cloud .tag.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .tag-cloud .tag.active i { color: var(--text-white); }

        @media (max-width: 520px) {
            .tag-cloud .tag { padding: 8px 16px; font-size: 0.85rem; }
        }

        /* ==================== 卡片网格 ==================== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108,92,231,0.15);
        }
        .card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-body);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-img img { transform: scale(1.05); }
        .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(108,92,231,0.9);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .card-img .card-difficulty {
            position: absolute;
            top: 12px;
            right: 12px;
            background: rgba(0,0,0,0.55);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.75rem;
            font-weight: 500;
        }
        .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a { color: var(--text-primary); }
        .card-body h3 a:hover { color: var(--primary); }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-top: auto;
        }
        .card-meta span i { margin-right: 4px; font-size: 0.75rem; }
        .card-meta .card-views i { color: var(--primary-light); }

        @media (max-width: 768px) {
            .card-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
        }
        @media (max-width: 520px) {
            .card-grid { grid-template-columns: 1fr; gap: 16px; }
            .card-body { padding: 16px 18px 20px; }
            .card-body h3 { font-size: 1.05rem; }
        }

        /* ==================== 排行榜 ==================== */
        .rank-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 22px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .rank-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(108,92,231,0.2);
        }
        .rank-num {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-white);
            background: var(--text-light);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num { background: linear-gradient(135deg, #F9CA24, #F0932B); }
        .rank-item:nth-child(2) .rank-num { background: linear-gradient(135deg, #A29BFE, #6C5CE7); }
        .rank-item:nth-child(3) .rank-num { background: linear-gradient(135deg, #FD79A8, #E84393); }
        .rank-item:nth-child(4) .rank-num, .rank-item:nth-child(5) .rank-num { background: var(--text-secondary); }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .rank-info p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .rank-score {
            text-align: right;
            flex-shrink: 0;
        }
        .rank-score .score-num {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
        }
        .rank-score .score-label {
            font-size: 0.75rem;
            color: var(--text-light);
            display: block;
        }

        @media (max-width: 520px) {
            .rank-item { padding: 14px 16px; gap: 12px; flex-wrap: wrap; }
            .rank-num { width: 34px; height: 34px; font-size: 0.95rem; }
            .rank-info h4 { font-size: 0.95rem; }
            .rank-score .score-num { font-size: 1.1rem; }
        }

        /* ==================== 步骤流程 ==================== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 36px 28px 32px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            text-align: center;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            counter-increment: step;
            content: "0" counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 900;
            color: rgba(108,92,231,0.07);
            line-height: 1;
            letter-spacing: -2px;
        }
        .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--text-white);
            box-shadow: 0 8px 24px rgba(108,92,231,0.2);
        }
        .step-card h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .steps-grid { grid-template-columns: 1fr; gap: 20px; }
            .step-card { padding: 28px 22px 26px; }
        }
        @media (max-width: 520px) {
            .step-card { padding: 22px 18px 20px; }
            .step-icon { width: 52px; height: 52px; font-size: 1.3rem; }
            .step-card h4 { font-size: 1rem; }
        }

        /* ==================== FAQ ==================== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(108,92,231,0.2); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-primary);
            cursor: pointer;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            font-size: 0.9rem;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.8;
        }

        @media (max-width: 520px) {
            .faq-question { padding: 14px 16px; font-size: 0.95rem; }
            .faq-answer { padding: 0 16px; }
            .faq-item.open .faq-answer { padding: 0 16px 16px; }
        }

        /* ==================== CTA ==================== */
        .cta-section {
            background: linear-gradient(135deg, #2D1B69 0%, #6C5CE7 50%, #A29BFE 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(253,121,168,0.25) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 50%, rgba(0,206,201,0.15) 0%, transparent 60%);
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2.4rem;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--text-white);
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0,0,0,0.2);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.7);
            transform: translateY(-3px);
        }

        @media (max-width: 768px) {
            .cta-section { padding: 56px 0; }
            .cta-section h2 { font-size: 1.8rem; }
            .cta-section p { font-size: 1rem; }
            .btn { padding: 12px 28px; font-size: 0.95rem; }
        }
        @media (max-width: 520px) {
            .cta-section { padding: 40px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .btn { padding: 10px 22px; font-size: 0.9rem; width: 100%; justify-content: center; }
            .cta-buttons { flex-direction: column; gap: 12px; }
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand a i { color: var(--secondary); font-size: 1.6rem; }
        .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255,255,255,0.55);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h5 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-col ul li a i { font-size: 0.7rem; color: var(--primary-light); }
        .footer-col ul li a:hover {
            color: var(--text-white);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            font-size: 1.1rem;
            transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.05);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(108,92,231,0.3);
        }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-brand p { max-width: 100%; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .site-footer { padding: 40px 0 0; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer-social { justify-content: center; }
            .footer-brand a { font-size: 1.15rem; }
        }

        /* ==================== 其他辅助 ==================== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 20px; }
        .mb-2 { margin-bottom: 20px; }
        .gap-2 { gap: 20px; }

        /* 板块分隔装饰 */
        .divider-wave {
            width: 100%;
            height: 60px;
            background: var(--bg-white);
            clip-path: ellipse(70% 100% at 50% 100%);
            margin-top: -1px;
        }

        /* 响应式微调 */
        @media (max-width: 1024px) {
            .container { padding: 0 20px; }
        }
        @media (max-width: 480px) {
            .container { padding: 0 14px; }
        }

        /* focus 可访问性 */
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }