/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #00d4ff;
            --clr-primary-dark: #0099cc;
            --clr-primary-light: #66e5ff;
            --clr-secondary: #7c3aed;
            --clr-secondary-light: #a78bfa;
            --clr-accent: #f59e0b;
            --clr-accent-dark: #d97706;
            --clr-bg: #0b1a2e;
            --clr-bg-alt: #0f2240;
            --clr-bg-card: #132a41;
            --clr-bg-card-hover: #1a3655;
            --clr-bg-nav: rgba(11, 26, 46, 0.92);
            --clr-bg-footer: #071220;
            --clr-text: #f0f4f8;
            --clr-text-secondary: #94a3b8;
            --clr-text-muted: #64748b;
            --clr-border: rgba(0, 212, 255, 0.15);
            --clr-border-hover: rgba(0, 212, 255, 0.35);
            --clr-gradient-hero: linear-gradient(135deg, rgba(11, 26, 46, 0.88) 0%, rgba(15, 34, 64, 0.75) 50%, rgba(0, 212, 255, 0.08) 100%);
            --clr-gradient-card: linear-gradient(145deg, rgba(19, 42, 65, 0.9) 0%, rgba(10, 22, 40, 0.95) 100%);
            --clr-glow: 0 0 20px rgba(0, 212, 255, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 212, 255, 0.06);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(0, 212, 255, 0.15);
            --shadow-btn: 0 4px 16px rgba(0, 212, 255, 0.25);
            --shadow-btn-hover: 0 8px 28px rgba(0, 212, 255, 0.4);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
            --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-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-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            min-height: 100vh;
        }
        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--clr-primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--clr-primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-display);
            line-height: 1.25;
            color: var(--clr-text);
            font-weight: 700;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: var(--clr-bg-nav);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--clr-border);
            transition: background var(--transition-base), border-color var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(7, 18, 32, 0.96);
            border-bottom-color: rgba(0, 212, 255, 0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-display);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--clr-text);
            letter-spacing: 0.5px;
        }
        .site-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--clr-primary);
            border-radius: var(--radius-sm);
            color: #0b1a2e;
            font-size: 1.1rem;
            font-weight: 900;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
        }
        .site-logo .logo-text {
            background: linear-gradient(135deg, #f0f4f8 0%, var(--clr-primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover .logo-text {
            background: linear-gradient(135deg, var(--clr-primary-light) 0%, #fff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav .nav-item {
            display: block;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--clr-text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.3px;
        }
        .main-nav .nav-item:hover {
            color: var(--clr-primary-light);
            background: rgba(0, 212, 255, 0.06);
        }
        .main-nav .nav-item.active {
            color: var(--clr-primary);
            background: rgba(0, 212, 255, 0.1);
        }
        .main-nav .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--clr-primary);
            box-shadow: 0 0 10px rgba(0, 212, 255, 0.6);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #0b1a2e;
            background: var(--clr-primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-btn);
            margin-left: 12px;
            letter-spacing: 0.3px;
        }
        .nav-cta:hover {
            background: var(--clr-primary-light);
            color: #0b1a2e;
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0px);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--clr-text);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .mobile-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding: calc(var(--nav-height) + 40px) 0 80px;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            filter: brightness(0.45) saturate(1.1);
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: var(--clr-gradient-hero);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--clr-primary-light);
            margin-bottom: 28px;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.7rem;
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-secondary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            line-height: 1.7;
            color: var(--clr-text-secondary);
            margin-bottom: 36px;
            max-width: 600px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #0b1a2e;
            background: var(--clr-primary);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-btn);
            transition: all var(--transition-fast);
            border: none;
            letter-spacing: 0.3px;
        }
        .btn-primary:hover {
            background: var(--clr-primary-light);
            color: #0b1a2e;
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0px);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--clr-text);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.3px;
        }
        .btn-secondary:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary-light);
            background: rgba(0, 212, 255, 0.06);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--clr-primary);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            margin-top: 4px;
            letter-spacing: 0.5px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--clr-bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--clr-primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .section-header .section-label::before,
        .section-header .section-label::after {
            content: '';
            width: 24px;
            height: 1px;
            background: var(--clr-primary);
            opacity: 0.4;
        }
        .section-header h2 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--clr-text-secondary);
            max-width: 580px;
            margin: 0 auto;
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .feature-card:hover {
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            background: var(--clr-bg-card-hover);
        }
        .feature-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 212, 255, 0.1);
            color: var(--clr-primary);
            font-size: 1.5rem;
            margin-bottom: 20px;
            transition: all var(--transition-fast);
        }
        .feature-card:hover .feature-icon {
            background: rgba(0, 212, 255, 0.18);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.15);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--clr-text-secondary);
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .category-card:hover {
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .category-card-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            transition: opacity var(--transition-slow);
            z-index: 0;
        }
        .category-card:hover .category-card-bg {
            opacity: 0.45;
        }
        .category-card .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 26, 46, 0.92) 0%, rgba(11, 26, 46, 0.3) 60%, transparent 100%);
            z-index: 1;
        }
        .category-card-content {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .category-card-content .cat-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.7rem;
            font-weight: 600;
            color: #0b1a2e;
            background: var(--clr-primary);
            border-radius: 100px;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .category-card-content h3 {
            font-size: 1.55rem;
            margin-bottom: 8px;
        }
        .category-card-content p {
            font-size: 0.9rem;
            color: var(--clr-text-secondary);
            max-width: 380px;
        }
        .category-card-content .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--clr-primary);
            transition: gap var(--transition-fast);
        }
        .category-card-content .cat-link:hover {
            gap: 12px;
        }

        /* ===== 最新资讯 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            display: flex;
            gap: 20px;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .news-card:hover {
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-card .news-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 90px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--clr-bg-alt);
        }
        .news-card .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-base);
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-card .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-card .news-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.75rem;
            color: var(--clr-text-muted);
            margin-bottom: 6px;
        }
        .news-card .news-meta .news-category {
            color: var(--clr-accent);
            font-weight: 600;
        }
        .news-card .news-meta .news-date {
            color: var(--clr-text-muted);
        }
        .news-card h3 {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card h3 a {
            color: var(--clr-text);
            transition: color var(--transition-fast);
        }
        .news-card h3 a:hover {
            color: var(--clr-primary-light);
        }
        .news-card .news-excerpt {
            font-size: 0.85rem;
            color: var(--clr-text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.6;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--clr-text-muted);
            font-size: 1rem;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--clr-border);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .stat-card .stat-number {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--clr-primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-card .stat-number .suffix {
            font-size: 1.2rem;
            color: var(--clr-text-muted);
            font-weight: 600;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--clr-text-secondary);
            font-weight: 500;
        }
        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: rgba(0, 212, 255, 0.15);
            margin-bottom: 12px;
        }

        /* ===== 专题推荐 ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .featured-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .featured-card:hover {
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .featured-card .featured-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            transition: opacity var(--transition-slow);
            z-index: 0;
        }
        .featured-card:hover .featured-bg {
            opacity: 0.5;
        }
        .featured-card .featured-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 26, 46, 0.92) 0%, rgba(11, 26, 46, 0.25) 60%, transparent 100%);
            z-index: 1;
        }
        .featured-card .featured-content {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .featured-content .featured-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.7rem;
            font-weight: 600;
            color: #0b1a2e;
            background: var(--clr-secondary);
            border-radius: 100px;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .featured-content .featured-tag.orange {
            background: var(--clr-accent);
        }
        .featured-content h3 {
            font-size: 1.35rem;
            margin-bottom: 8px;
        }
        .featured-content p {
            font-size: 0.88rem;
            color: var(--clr-text-secondary);
            max-width: 400px;
            line-height: 1.7;
        }
        .featured-content .featured-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--clr-primary);
            transition: gap var(--transition-fast);
        }
        .featured-content .featured-link:hover {
            gap: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--clr-border-hover);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--clr-text);
            cursor: pointer;
            transition: color var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-item .faq-question:hover {
            color: var(--clr-primary-light);
        }
        .faq-item .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--clr-primary);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-item .faq-answer p {
            font-size: 0.92rem;
            color: var(--clr-text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-box {
            position: relative;
            z-index: 1;
            background: var(--clr-gradient-card);
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            text-align: center;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.05rem;
            color: var(--clr-text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-box .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--clr-bg-footer);
            border-top: 1px solid var(--clr-border);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .site-logo {
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--clr-text-muted);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--clr-primary-light);
        }
        .footer-col .social-links {
            display: flex;
            gap: 12px;
            margin-top: 12px;
        }
        .footer-col .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            color: var(--clr-text-secondary);
            font-size: 1rem;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }
        .footer-col .social-links a:hover {
            background: rgba(0, 212, 255, 0.1);
            color: var(--clr-primary);
            border-color: rgba(0, 212, 255, 0.2);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--clr-text-muted);
        }
        .footer-bottom a {
            color: var(--clr-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--clr-primary-light);
        }

        /* ===== 按钮通用 ===== */
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--clr-text);
            border: 1.5px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary-light);
            background: rgba(0, 212, 255, 0.06);
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .hero-title {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(7, 18, 32, 0.98);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 4px;
                border-bottom: 1px solid var(--clr-border);
                transform: translateY(-110%);
                opacity: 0;
                transition: all var(--transition-base);
                pointer-events: none;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav .nav-item {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
            }
            .main-nav .nav-item.active::after {
                display: none;
            }
            .main-nav .nav-item.active {
                background: rgba(0, 212, 255, 0.08);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
                width: 100%;
            }
            .hero {
                min-height: 80vh;
                padding: calc(var(--nav-height) + 24px) 0 48px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stat-number {
                font-size: 1.4rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card .news-thumb {
                width: 100%;
                height: 180px;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-desc {
                font-size: 0.92rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 20px 16px;
            }
            .stat-card .stat-number {
                font-size: 1.6rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .category-card {
                min-height: 220px;
            }
            .category-card-content {
                padding: 20px 20px;
            }
            .category-card-content h3 {
                font-size: 1.2rem;
            }
            .news-card .news-thumb {
                height: 140px;
            }
            .featured-card {
                min-height: 240px;
            }
            .featured-content {
                padding: 20px 20px;
            }
            .featured-content h3 {
                font-size: 1.1rem;
            }
            .cta-box {
                padding: 28px 16px;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .footer-grid {
                gap: 24px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .container {
                padding: 0 12px;
            }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--clr-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 212, 255, 0.3);
            border-radius: 6px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 212, 255, 0.5);
        }

        /* ===== 选中 ===== */
        ::selection {
            background: rgba(0, 212, 255, 0.25);
            color: #fff;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #00d4ff;
            --clr-primary-dark: #009dbe;
            --clr-primary-glow: rgba(0, 212, 255, 0.25);
            --clr-secondary: #7c3aed;
            --clr-secondary-glow: rgba(124, 58, 237, 0.25);
            --clr-accent: #f59e0b;
            --clr-bg: #0b0e1a;
            --clr-bg-alt: #111629;
            --clr-bg-card: rgba(255, 255, 255, 0.04);
            --clr-bg-card-hover: rgba(255, 255, 255, 0.08);
            --clr-surface: #1a1f36;
            --clr-surface-light: #262d47;
            --clr-text: #e8edf5;
            --clr-text-secondary: #8892b0;
            --clr-text-muted: #5a6480;
            --clr-border: rgba(0, 212, 255, 0.12);
            --clr-border-hover: rgba(0, 212, 255, 0.3);
            --clr-danger: #ef4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px var(--clr-primary-glow), 0 0 60px rgba(0, 212, 255, 0.08);
            --shadow-glow-secondary: 0 0 20px var(--clr-secondary-glow), 0 0 60px rgba(124, 58, 237, 0.08);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 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);
            background: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }
        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #66e5ff;
        }
        a:focus-visible {
            outline: 2px solid var(--clr-primary);
            outline-offset: 4px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--clr-border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 14, 26, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--clr-text);
            letter-spacing: -0.03em;
            flex-shrink: 0;
        }
        .site-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1.1rem;
            font-weight: 900;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }
        .site-logo .logo-text {
            background: linear-gradient(90deg, var(--clr-text), var(--clr-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover .logo-text {
            background: linear-gradient(90deg, var(--clr-primary), var(--clr-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .nav-item {
            padding: 8px 18px;
            color: var(--clr-text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.02em;
        }
        .nav-item::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            transform: translateX(-50%);
            transition: var(--transition);
        }
        .nav-item:hover {
            color: var(--clr-text);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-item:hover::after {
            width: 60%;
        }
        .nav-item.active {
            color: var(--clr-primary);
        }
        .nav-item.active::after {
            width: 80%;
            background: var(--clr-primary);
            box-shadow: 0 0 12px var(--clr-primary-glow);
        }
        .nav-cta {
            padding: 8px 22px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
            margin-left: var(--spacing-sm);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            color: #fff;
        }
        .nav-cta:active {
            transform: translateY(0);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--clr-text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 60px;
            background: linear-gradient(135deg, #0b0e1a 0%, #111629 50%, #0f1525 100%);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 14, 26, 0.92) 0%, rgba(11, 14, 26, 0.6) 100%);
            z-index: 1;
        }
        .article-hero .container-narrow {
            position: relative;
            z-index: 2;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-bottom: var(--spacing-lg);
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: var(--clr-text-muted);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--clr-primary);
        }
        .article-hero .breadcrumb .sep {
            color: var(--clr-text-muted);
            font-size: 0.7rem;
        }
        .article-hero .breadcrumb .current {
            color: var(--clr-primary);
        }
        .article-hero .article-category {
            display: inline-block;
            padding: 4px 16px;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(124, 58, 237, 0.15));
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--clr-primary);
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.04em;
        }
        .article-hero h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.25;
            color: var(--clr-text);
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.03em;
            text-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
        }
        .article-hero .article-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            flex-wrap: wrap;
            color: var(--clr-text-secondary);
            font-size: 0.9rem;
        }
        .article-hero .article-meta i {
            color: var(--clr-primary);
            margin-right: var(--spacing-xs);
            font-size: 0.85rem;
        }
        .article-hero .article-meta span {
            display: flex;
            align-items: center;
        }

        /* ===== 文章正文 ===== */
        .article-body {
            padding: var(--spacing-3xl) 0 var(--spacing-2xl);
            background: var(--clr-bg);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--clr-text);
        }
        .article-body .article-content p {
            margin-bottom: 1.6em;
        }
        .article-body .article-content h2,
        .article-body .article-content h3,
        .article-body .article-content h4 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            color: var(--clr-text);
            font-weight: 700;
        }
        .article-body .article-content h2 {
            font-size: 1.6rem;
            border-left: 4px solid var(--clr-primary);
            padding-left: var(--spacing-md);
        }
        .article-body .article-content h3 {
            font-size: 1.3rem;
        }
        .article-body .article-content a {
            color: var(--clr-primary);
            border-bottom: 1px solid rgba(0, 212, 255, 0.3);
        }
        .article-body .article-content a:hover {
            border-bottom-color: var(--clr-primary);
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--clr-secondary);
            padding: var(--spacing-md) var(--spacing-lg);
            margin: 1.6em 0;
            background: rgba(124, 58, 237, 0.08);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--clr-text-secondary);
            font-style: italic;
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin: 1.2em 0;
            padding-left: 1.5em;
        }
        .article-body .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-body .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-body .article-content img {
            border-radius: var(--radius-md);
            margin: 1.6em 0;
            box-shadow: var(--shadow-md);
        }
        .article-body .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.6em 0;
            font-size: 0.95rem;
        }
        .article-body .article-content th,
        .article-body .article-content td {
            padding: var(--spacing-sm) var(--spacing-md);
            border: 1px solid var(--clr-border);
            text-align: left;
        }
        .article-body .article-content th {
            background: var(--clr-surface);
            font-weight: 600;
            color: var(--clr-primary);
        }
        .article-body .article-content td {
            background: var(--clr-bg-card);
        }
        .article-body .article-content code {
            font-family: var(--font-mono);
            background: rgba(0, 212, 255, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body .article-content pre {
            background: var(--clr-bg-alt);
            padding: var(--spacing-lg);
            border-radius: var(--radius-md);
            overflow-x: auto;
            border: 1px solid var(--clr-border);
            margin: 1.6em 0;
        }
        .article-body .article-content pre code {
            background: none;
            padding: 0;
            font-size: 0.9rem;
        }
        .article-body .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-2xl);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--clr-border);
        }
        .article-body .article-tags .tag {
            padding: 4px 14px;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.15);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--clr-text-secondary);
            transition: var(--transition);
        }
        .article-body .article-tags .tag:hover {
            background: rgba(0, 212, 255, 0.15);
            color: var(--clr-primary);
            border-color: var(--clr-primary);
        }
        .article-body .article-share {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--clr-border);
        }
        .article-body .article-share span {
            font-size: 0.9rem;
            color: var(--clr-text-secondary);
            font-weight: 500;
        }
        .article-body .article-share .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-secondary);
            font-size: 1rem;
            transition: var(--transition);
        }
        .article-body .article-share .share-btn:hover {
            background: var(--clr-primary);
            color: #fff;
            border-color: var(--clr-primary);
            transform: translateY(-3px);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }

        /* ===== 文章未找到 ===== */
        .not-found-block {
            padding: var(--spacing-4xl) 0;
            text-align: center;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .not-found-block .not-found-icon {
            font-size: 4rem;
            color: var(--clr-text-muted);
            margin-bottom: var(--spacing-lg);
        }
        .not-found-block h2 {
            font-size: 2rem;
            color: var(--clr-text);
            margin-bottom: var(--spacing-md);
        }
        .not-found-block p {
            color: var(--clr-text-secondary);
            max-width: 480px;
            margin: 0 auto var(--spacing-xl);
        }
        .not-found-block .btn-home {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
        }
        .not-found-block .btn-home:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: var(--spacing-3xl) 0;
            background: var(--clr-bg-alt);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }
        .related-section .section-header h2 {
            font-size: 1.8rem;
            color: var(--clr-text);
        }
        .related-section .section-header p {
            color: var(--clr-text-secondary);
            margin-top: var(--spacing-sm);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: var(--spacing-lg);
        }
        .related-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-glow);
            background: var(--clr-bg-card-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
        }
        .related-card .card-body .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(0, 212, 255, 0.12);
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--clr-primary);
            margin-bottom: var(--spacing-sm);
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--clr-text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-xs);
            margin-top: var(--spacing-sm);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--clr-primary);
        }
        .related-card .card-body .card-link i {
            font-size: 0.75rem;
            transition: var(--transition);
        }
        .related-card .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-3xl) 0;
            background: var(--clr-bg);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }
        .faq-section .section-header h2 {
            font-size: 1.8rem;
            color: var(--clr-text);
        }
        .faq-section .section-header p {
            color: var(--clr-text-secondary);
            margin-top: var(--spacing-sm);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }
        .faq-item {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--clr-border-hover);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg);
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--clr-text);
            transition: var(--transition);
            background: none;
            width: 100%;
            text-align: left;
            gap: var(--spacing-md);
        }
        .faq-item .faq-question:hover {
            color: var(--clr-primary);
        }
        .faq-item .faq-question .faq-icon {
            font-size: 0.85rem;
            color: var(--clr-primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 var(--spacing-lg);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-lg) var(--spacing-lg);
        }
        .faq-item .faq-answer p {
            color: var(--clr-text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--spacing-3xl) 0;
            background: var(--clr-bg-alt);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-box {
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
            padding: var(--spacing-2xl) var(--spacing-lg);
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(10px);
        }
        .cta-box h2 {
            font-size: 1.8rem;
            color: var(--clr-text);
            margin-bottom: var(--spacing-md);
        }
        .cta-box p {
            color: var(--clr-text-secondary);
            margin-bottom: var(--spacing-xl);
            font-size: 1.05rem;
        }
        .cta-box .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .cta-box .btn-primary {
            padding: 12px 32px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .cta-box .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            color: #fff;
        }
        .cta-box .btn-outline {
            padding: 12px 32px;
            background: transparent;
            color: var(--clr-text);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .cta-box .btn-outline:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070912;
            border-top: 1px solid var(--clr-border);
            padding: var(--spacing-2xl) 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: var(--spacing-2xl);
            padding-bottom: var(--spacing-2xl);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-brand .site-logo {
            margin-bottom: var(--spacing-md);
        }
        .site-footer .footer-brand p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: var(--spacing-lg);
            position: relative;
            padding-bottom: var(--spacing-sm);
        }
        .site-footer .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
        }
        .site-footer .footer-col ul li {
            margin-bottom: var(--spacing-sm);
        }
        .site-footer .footer-col ul li a {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--clr-primary);
            transform: translateX(4px);
        }
        .site-footer .footer-col .social-links {
            display: flex;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .site-footer .footer-col .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: var(--clr-text-muted);
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .site-footer .footer-col .social-links a:hover {
            background: var(--clr-primary);
            color: #fff;
            border-color: var(--clr-primary);
            transform: translateY(-3px);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }
        .site-footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-lg) 0;
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            flex-wrap: wrap;
            gap: var(--spacing-md);
        }
        .site-footer .footer-bottom a {
            color: var(--clr-text-muted);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--clr-primary);
        }

        /* ===== 按钮通用 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-sm);
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            text-align: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-secondary));
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--clr-text);
            border: 1px solid var(--clr-border);
        }
        .btn-outline:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 62px;
            }
            .main-nav {
                position: fixed;
                top: 62px;
                left: 0;
                width: 100%;
                background: rgba(11, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: var(--spacing-sm);
                border-bottom: 1px solid var(--clr-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav .nav-item {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .main-nav .nav-cta {
                width: 100%;
                justify-content: center;
                margin-left: 0;
                margin-top: var(--spacing-sm);
                padding: 12px 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .article-hero {
                padding: 100px 0 40px;
                min-height: 280px;
            }
            .article-hero h1 {
                font-size: 1.6rem;
            }
            .article-hero .article-meta {
                gap: var(--spacing-md);
                font-size: 0.8rem;
            }
            .article-body {
                padding: var(--spacing-xl) 0;
            }
            .article-body .article-content {
                font-size: 1rem;
            }
            .article-body .article-content h2 {
                font-size: 1.3rem;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .faq-item .faq-question {
                padding: var(--spacing-md);
                font-size: 0.95rem;
            }
            .cta-box {
                padding: var(--spacing-xl) var(--spacing-md);
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-xl);
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-md);
            }
            .container-narrow {
                padding: 0 var(--spacing-md);
            }
            .header-inner {
                padding: 0 var(--spacing-md);
            }
            .article-hero h1 {
                font-size: 1.3rem;
            }
            .article-hero .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-sm);
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-box .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-box .btn-primary,
            .cta-box .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .article-body .article-share {
                flex-wrap: wrap;
            }
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--clr-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--clr-surface-light);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--clr-text-muted);
        }

        /* ===== 选中高亮 ===== */
        ::selection {
            background: rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        /* ===== 骨架动画 ===== */
        @keyframes shimmer {
            0% {
                background-position: -200% 0;
            }
            100% {
                background-position: 200% 0;
            }
        }
        .skeleton {
            background: linear-gradient(90deg, var(--clr-bg-card) 25%, var(--clr-bg-card-hover) 50%, var(--clr-bg-card) 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-dark: #0088cc;
            --primary-glow: rgba(0, 212, 255, 0.25);
            --secondary: #7c3aed;
            --secondary-light: #a855f7;
            --secondary-glow: rgba(124, 58, 237, 0.25);
            --accent: #ff6b6b;
            --accent-glow: rgba(255, 107, 107, 0.2);
            --bg-body: #080c18;
            --bg-card: #11162b;
            --bg-card-hover: #161c36;
            --bg-section: #0c1124;
            --bg-section-alt: #0e1429;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e2a4a;
            --border-glow: rgba(0, 212, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --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 48px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(8, 12, 24, 0.88);
            backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        .site-logo:hover {
            color: var(--primary);
        }
        .site-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            box-shadow: 0 0 16px var(--primary-glow);
        }
        .site-logo .logo-text {
            letter-spacing: 0.5px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav .nav-item {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .main-nav .nav-item::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .main-nav .nav-item:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .main-nav .nav-item:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .main-nav .nav-item.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
        }
        .main-nav .nav-item.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--primary);
            box-shadow: 0 0 8px var(--primary-glow);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
            border: none;
            cursor: pointer;
            margin-left: 8px;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
            color: #fff;
        }
        .nav-cta:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        @media (max-width: 820px) {
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(8, 12, 24, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav .nav-item {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .main-nav .nav-item::after {
                display: none;
            }
            .main-nav .nav-item.active {
                background: rgba(0, 212, 255, 0.12);
                border-left: 3px solid var(--primary);
                border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            }
            .nav-cta {
                width: 100%;
                justify-content: center;
                margin-left: 0;
                margin-top: 8px;
                padding: 12px;
            }
            .nav-toggle {
                display: block;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            margin-top: var(--header-height);
            padding: 80px 0 64px;
            background: linear-gradient(135deg, #0a0e1e 0%, #0c1124 40%, #0f1a30 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.06), transparent 70%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--text-primary) 40%, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.15);
            color: var(--text-secondary);
        }
        .hero-badge i {
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 60px 0 48px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .hero-badges {
                gap: 8px;
            }
            .hero-badge {
                font-size: 0.78rem;
                padding: 5px 12px;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-header h2 i {
            color: var(--primary);
            margin-right: 10px;
        }
        .section-header p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 0;
            box-shadow: 0 0 12px var(--primary-glow);
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== Filter Tags ===== */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 48px;
        }
        .filter-tag {
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tag:hover {
            background: rgba(0, 212, 255, 0.08);
            border-color: rgba(0, 212, 255, 0.2);
            color: var(--text-primary);
        }
        .filter-tag.active {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(124, 58, 237, 0.15));
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 0 16px var(--primary-glow);
        }

        /* ===== News Grid ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .news-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.15);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .news-card .card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #0a0e1a;
        }
        .news-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .card-img img {
            transform: scale(1.05);
        }
        .news-card .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(0, 212, 255, 0.15);
            backdrop-filter: blur(6px);
            color: var(--primary);
            border: 1px solid rgba(0, 212, 255, 0.2);
        }
        .news-card .card-body {
            padding: 20px 22px 24px;
        }
        .news-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .news-card .card-meta i {
            margin-right: 4px;
            font-size: 0.75rem;
        }
        .news-card .card-meta .read-more {
            color: var(--primary);
            font-weight: 500;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .news-card .card-meta .read-more:hover {
            color: var(--secondary-light);
            gap: 4px;
        }

        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }
        }
        @media (max-width: 620px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .news-card .card-body {
                padding: 18px 18px 20px;
            }
            .news-card .card-body h3 {
                font-size: 1rem;
            }
        }

        /* ===== Trending List ===== */
        .trending-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .trending-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .trending-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: default;
        }
        .trending-item:hover {
            background: var(--bg-card-hover);
            border-color: rgba(0, 212, 255, 0.1);
            transform: translateX(4px);
        }
        .trending-item .rank {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
        }
        .trending-item:nth-child(1) .rank {
            background: linear-gradient(135deg, rgba(255, 107, 107, 0.2), rgba(255, 107, 107, 0.05));
            color: var(--accent);
            border-color: rgba(255, 107, 107, 0.2);
        }
        .trending-item:nth-child(2) .rank {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), rgba(0, 212, 255, 0.05));
            color: var(--primary);
            border-color: rgba(0, 212, 255, 0.15);
        }
        .trending-item:nth-child(3) .rank {
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(124, 58, 237, 0.05));
            color: var(--secondary-light);
            border-color: rgba(124, 58, 237, 0.15);
        }
        .trending-item .content {
            flex: 1;
        }
        .trending-item .content h4 {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.5;
        }
        .trending-item .content span {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .trending-item .hot-badge {
            flex-shrink: 0;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 600;
            background: rgba(255, 107, 107, 0.1);
            color: var(--accent);
            border: 1px solid rgba(255, 107, 107, 0.15);
        }
        .trending-featured {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .trending-featured:hover {
            border-color: rgba(0, 212, 255, 0.15);
            box-shadow: var(--shadow-glow);
        }
        .trending-featured img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .trending-featured .featured-body {
            padding: 20px 24px 24px;
        }
        .trending-featured .featured-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .trending-featured .featured-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .trending-featured .featured-body .tag-sm {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            background: rgba(0, 212, 255, 0.08);
            color: var(--primary);
            border: 1px solid rgba(0, 212, 255, 0.1);
        }
        @media (max-width: 900px) {
            .trending-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .trending-item {
                padding: 12px 14px;
                gap: 12px;
            }
            .trending-item .content h4 {
                font-size: 0.9rem;
            }
            .trending-featured .featured-body {
                padding: 16px 18px 20px;
            }
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 212, 255, 0.12);
            box-shadow: var(--shadow-glow);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
            display: block;
        }
        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--text-primary), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 820px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .stat-card .stat-number {
                font-size: 2rem;
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 24px 14px;
            }
            .stat-card .stat-number {
                font-size: 1.7rem;
            }
        }

        /* ===== Featured Topics ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .topic-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .topic-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.15);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .topic-card .topic-img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: var(--transition);
        }
        .topic-card:hover .topic-img {
            transform: scale(1.04);
        }
        .topic-card .topic-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px 18px 18px;
            background: linear-gradient(transparent, rgba(8, 12, 24, 0.92));
        }
        .topic-card .topic-overlay h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }
        .topic-card .topic-overlay span {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.65);
        }
        @media (max-width: 960px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.1);
        }
        .faq-item .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-question i {
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 260px;
            padding: 0 24px 20px;
        }
        @media (max-width: 620px) {
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 0.93rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px;
                font-size: 0.88rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #0a0e1e 0%, #0f1a30 50%, #0c1124 100%);
            position: relative;
            overflow: hidden;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.04), transparent 70%);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.04), transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
        }
        .cta-form input[type="email"] {
            flex: 1;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }
        .cta-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }
        .cta-form input[type="email"]:focus {
            border-color: var(--primary);
            box-shadow: 0 0 16px var(--primary-glow);
        }
        .cta-form button {
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.95rem;
            white-space: nowrap;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
        }
        .cta-form button:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
        }
        .cta-form button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .cta-note {
            margin-top: 14px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        @media (max-width: 620px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-form {
                flex-direction: column;
                gap: 10px;
            }
            .cta-form input[type="email"] {
                width: 100%;
                text-align: center;
            }
            .cta-form button {
                width: 100%;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060a16;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .site-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .social-links {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .social-links a:hover {
            background: rgba(0, 212, 255, 0.08);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 0 16px var(--primary-glow);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 620px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.6s ease forwards;
        }
        .animate-in-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #00d4ff;
            --clr-primary-dark: #00a8cc;
            --clr-primary-light: #66e5ff;
            --clr-accent: #7b2ffc;
            --clr-accent-dark: #5a1fc9;
            --clr-accent-light: #a87aff;
            --clr-bg: #0a0a0f;
            --clr-bg-alt: #12121a;
            --clr-bg-card: #1a1a28;
            --clr-bg-card-hover: #22223a;
            --clr-text: #f0f0f5;
            --clr-text-secondary: #a0a0c0;
            --clr-text-muted: #6a6a8a;
            --clr-border: #2a2a40;
            --clr-border-light: #3a3a55;
            --clr-success: #00e676;
            --clr-warning: #ffd740;
            --clr-error: #ff5252;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 212, 255, 0.05);
            --shadow-hover: 0 16px 48px rgba(0, 212, 255, 0.15), 0 0 0 1px rgba(0, 212, 255, 0.15);
            --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.08);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', monospace;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 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;
        }

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

        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--clr-primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 排版 ===== */
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 0.6rem;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--clr-text-secondary);
            max-width: 640px;
            margin-bottom: 2.5rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header .section-sub {
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.8rem;
            }
            .section-sub {
                font-size: 1rem;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 15, 0.88);
            backdrop-filter: blur(16px) saturate(1.4);
            border-bottom: 1px solid var(--clr-border);
            height: var(--header-height);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--clr-text);
            text-decoration: none;
        }
        .site-logo:hover {
            color: var(--clr-text);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            border-radius: 10px;
            font-size: 1.2rem;
            color: #fff;
            font-weight: 800;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
        }
        .logo-text {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav .nav-item {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--clr-text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .main-nav .nav-item:hover {
            color: var(--clr-text);
            background: rgba(255, 255, 255, 0.05);
        }
        .main-nav .nav-item.active {
            color: var(--clr-primary);
            background: rgba(0, 212, 255, 0.1);
        }
        .main-nav .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--clr-primary);
            border-radius: 4px;
            box-shadow: 0 0 12px var(--clr-primary);
        }
        .main-nav .nav-cta {
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            margin-left: 8px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: none;
            color: var(--clr-text);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--clr-border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                align-items: stretch;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .main-nav .nav-item {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .main-nav .nav-item.active::after {
                display: none;
            }
            .main-nav .nav-item.active {
                background: rgba(0, 212, 255, 0.12);
            }
            .main-nav .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
                padding: 12px;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding-top: calc(var(--header-height) + 20px);
            min-height: 380px;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--clr-bg-alt);
            border-bottom: 1px solid var(--clr-border);
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .page-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(0, 212, 255, 0.08), transparent 70%),
                radial-gradient(ellipse at 80% 60%, rgba(123, 47, 252, 0.06), transparent 60%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.2);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--clr-primary);
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .page-hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff, var(--clr-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            max-width: 720px;
        }
        .page-hero .hero-desc {
            font-size: 1.2rem;
            color: var(--clr-text-secondary);
            max-width: 600px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--clr-primary);
            font-family: var(--font-mono);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
        }

        @media (max-width: 768px) {
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .page-hero {
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 80px 0;
            border-bottom: 1px solid var(--clr-border);
        }
        .section-block:last-of-type {
            border-bottom: none;
        }
        .section-block.alt-bg {
            background: var(--clr-bg-alt);
        }

        @media (max-width: 768px) {
            .section-block {
                padding: 48px 0;
            }
        }

        /* ===== 标签筛选 ===== */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .filter-tag {
            padding: 8px 22px;
            border-radius: 50px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-tag:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            background: rgba(0, 212, 255, 0.06);
        }
        .filter-tag.active {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            border-color: transparent;
            color: #fff;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .card-grid,
            .card-grid.cols-2,
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== 专题卡片 ===== */
        .feature-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.2);
            box-shadow: var(--shadow-hover);
            background: var(--clr-bg-card-hover);
        }
        .feature-card .card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--clr-bg-alt);
        }
        .feature-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .feature-card:hover .card-img img {
            transform: scale(1.05);
        }
        .feature-card .card-img .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            box-shadow: 0 4px 16px rgba(0, 212, 255, 0.25);
        }
        .feature-card .card-body {
            padding: 24px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            margin-bottom: 10px;
        }
        .feature-card .card-body .card-meta i {
            margin-right: 4px;
        }
        .feature-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.35;
            color: var(--clr-text);
        }
        .feature-card .card-body p {
            font-size: 0.92rem;
            color: var(--clr-text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .feature-card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--clr-primary);
            transition: gap var(--transition);
        }
        .feature-card .card-body .card-link:hover {
            gap: 14px;
            color: var(--clr-primary-light);
        }

        /* ===== 排行列表 ===== */
        .rank-list {
            display: grid;
            gap: 16px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            padding: 16px 22px;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .rank-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
            background: var(--clr-bg-card-hover);
            transform: translateX(4px);
        }
        .rank-item .rank-num {
            font-size: 1.6rem;
            font-weight: 900;
            font-family: var(--font-mono);
            color: var(--clr-text-muted);
            min-width: 40px;
            text-align: center;
            line-height: 1;
        }
        .rank-item:nth-child(1) .rank-num {
            color: var(--clr-warning);
        }
        .rank-item:nth-child(2) .rank-num {
            color: var(--clr-primary);
        }
        .rank-item:nth-child(3) .rank-num {
            color: var(--clr-accent-light);
        }
        .rank-item .rank-content {
            flex: 1;
        }
        .rank-item .rank-content h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: 2px;
        }
        .rank-item .rank-content span {
            font-size: 0.82rem;
            color: var(--clr-text-muted);
        }
        .rank-item .rank-badge {
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 212, 255, 0.1);
            color: var(--clr-primary);
            border: 1px solid rgba(0, 212, 255, 0.15);
        }
        .rank-item .rank-badge.hot {
            background: rgba(255, 82, 82, 0.12);
            color: var(--clr-error);
            border-color: rgba(255, 82, 82, 0.2);
        }
        .rank-item .rank-badge.new {
            background: rgba(0, 230, 118, 0.12);
            color: var(--clr-success);
            border-color: rgba(0, 230, 118, 0.2);
        }

        @media (max-width: 520px) {
            .rank-item {
                flex-wrap: wrap;
                padding: 14px 16px;
            }
            .rank-item .rank-num {
                font-size: 1.2rem;
                min-width: 30px;
            }
        }

        /* ===== 数据/统计区块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: rgba(0, 212, 255, 0.15);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--clr-primary);
            margin-bottom: 12px;
        }
        .stat-card .stat-number {
            font-size: 2.6rem;
            font-weight: 900;
            font-family: var(--font-mono);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .stat-label {
            font-size: 0.9rem;
            color: var(--clr-text-secondary);
            margin-top: 6px;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ===== 流程/时间线 ===== */
        .timeline {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            position: relative;
        }
        .timeline::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent), var(--clr-primary));
            opacity: 0.2;
        }
        .timeline-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .timeline-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #fff;
            font-size: 1.4rem;
            font-weight: 800;
            font-family: var(--font-mono);
            box-shadow: 0 0 30px rgba(0, 212, 255, 0.2);
            margin-bottom: 18px;
        }
        .timeline-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 8px;
        }
        .timeline-step p {
            font-size: 0.9rem;
            color: var(--clr-text-secondary);
            max-width: 280px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .timeline {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .timeline::before {
                display: none;
            }
            .timeline-step p {
                max-width: 100%;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--clr-border);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.15);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--clr-text);
            gap: 16px;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-item .faq-q:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-item .faq-q i {
            color: var(--clr-primary);
            transition: transform var(--transition);
            font-size: 0.85rem;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            color: var(--clr-text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-a {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
            text-align: center;
            padding: 80px 0;
        }
        .cta-block h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-block p {
            color: var(--clr-text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #fff;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.3);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--clr-text);
            border: 1px solid var(--clr-border-light);
        }
        .btn-outline:hover {
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            background: rgba(0, 212, 255, 0.04);
            transform: translateY(-3px);
        }

        @media (max-width: 520px) {
            .cta-block h2 {
                font-size: 1.6rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--clr-text-muted);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--clr-primary);
        }
        .social-links {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-secondary);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .social-links a:hover {
            background: var(--clr-primary);
            border-color: var(--clr-primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(0, 212, 255, 0.2);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--clr-border);
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--clr-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--clr-primary);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 实用辅助 ===== */
        .text-gradient {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .glow-line {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
            border-radius: 4px;
            margin: 0 auto 20px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--clr-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--clr-border-light);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--clr-text-muted);
        }

        /* ===== 按钮回到顶部 (可选) ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
            cursor: pointer;
            border: none;
            opacity: 0;
            transform: translateY(20px);
            transition: all var(--transition);
            z-index: 999;
        }
        .back-top.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .back-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 212, 255, 0.3);
            color: #fff;
        }