/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --primary-light: #818cf8;
            --accent: #f97316;
            --accent-dark: #ea580c;
            --accent-light: #fb923c;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --dark-3: #334155;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-sidebar: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 48px rgba(15, 23, 42, 0.12);
            --shadow-sidebar: 2px 0 32px rgba(0, 0, 0, 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --sidebar-width: 260px;
            --header-height: 70px;
            --max-width: 1280px;
            --gap: 32px;
            --gap-sm: 20px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 3rem;
        }
        h2 {
            font-size: 2.25rem;
            margin-bottom: 0.5em;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.125rem;
        }
        p {
            margin-bottom: 1em;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .section-title p {
            font-size: 1.125rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 8px auto 0;
        }
        .text-center {
            text-align: center;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            text-transform: uppercase;
            background: var(--primary-light);
            color: #fff;
        }
        .badge-accent {
            background: var(--accent);
            color: #fff;
        }
        .badge-outline {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: var(--shadow-sidebar);
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .sidebar-logo a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .sidebar-logo a:hover {
            color: var(--primary-light);
        }
        .sidebar-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            padding: 20px 16px;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: rgba(255, 255, 255, 0.35);
            padding: 12px 12px 8px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            margin-bottom: 2px;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
        }
        .sidebar-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--bg-sidebar);
            z-index: 999;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
        }
        .mobile-header .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .mobile-header .logo-link .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
        }
        .hamburger {
            display: flex;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== 遮罩 ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 998;
            backdrop-filter: blur(4px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background: var(--dark);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.6) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero .badge {
            margin-bottom: 20px;
            background: var(--accent);
            color: #fff;
            font-size: 0.8rem;
            padding: 6px 20px;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            line-height: 1.15;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(79, 70, 229, 0.35);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.35);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.875rem;
        }

        /* ===== 特色板块 ===== */
        .features {
            background: var(--bg);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 32px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
        }
        .feature-card .icon.purple {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card .icon.orange {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
        }
        .feature-card .icon.teal {
            background: linear-gradient(135deg, #0d9488, #2dd4bf);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            font-weight: 700;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== 分类入口 ===== */
        .categories {
            background: var(--bg);
            padding-top: 0;
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gap);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .category-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img img {
            transform: scale(1.08);
        }
        .category-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 42, 0.3) 0%, transparent 60%);
        }
        .category-card .card-body {
            padding: 24px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card .card-body .badge {
            align-self: flex-start;
            margin-bottom: 12px;
        }
        .category-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 16px;
            flex: 1;
        }
        .category-card .card-body .btn {
            align-self: flex-start;
        }

        /* ===== 最新资讯 ===== */
        .latest-news {
            background: var(--dark);
            color: #fff;
        }
        .latest-news .section-title h2 {
            color: #fff;
        }
        .latest-news .section-title p {
            color: rgba(255, 255, 255, 0.6);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--gap);
        }
        .news-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border-radius: var(--radius);
            padding: 28px 32px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .news-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.16);
            transform: translateY(-3px);
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 10px;
        }
        .news-card .meta .tag {
            background: var(--primary);
            color: #fff;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.7rem;
            font-weight: 600;
        }
        .news-card h3 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 8px;
            font-weight: 600;
            line-height: 1.4;
        }
        .news-card h3 a {
            color: #fff;
        }
        .news-card h3 a:hover {
            color: var(--primary-light);
        }
        .news-card p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.05rem;
        }

        /* ===== 数据统计 ===== */
        .stats {
            background: var(--bg);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .stat-card {
            text-align: center;
            padding: 40px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .stat-card .number {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 8px;
        }
        .stat-card .number .suffix {
            font-size: 1.6rem;
            font-weight: 700;
        }
        .stat-card .label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== 流程 ===== */
        .process {
            background: var(--bg);
            padding-top: 0;
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
            z-index: 0;
            opacity: 0.3;
        }
        .step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 20px rgba(79, 70, 229, 0.3);
        }
        .step:nth-child(2) .step-num {
            background: var(--accent);
        }
        .step:nth-child(3) .step-num {
            background: #0d9488;
        }
        .step:nth-child(4) .step-num {
            background: var(--primary-light);
        }
        .step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq {
            background: var(--bg);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            gap: 16px;
            user-select: none;
        }
        .faq-item .faq-question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-item .faq-answer-inner {
            padding: 0 28px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--dark);
            position: relative;
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
        }
        .cta .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 20px;
        }
        .cta h2 {
            color: #fff;
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark-2);
            color: rgba(255, 255, 255, 0.6);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }
        .footer-brand .logo-link .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-xs);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 0.95rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.45);
            max-width: 300px;
            margin-bottom: 16px;
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            background: rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1200px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .process-steps::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --sidebar-width: 0px;
                --gap: 20px;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--header-height);
            }
            .hero {
                padding: 80px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section {
                padding: 60px 0;
            }
            .section-title h2 {
                font-size: 1.8rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-card .number {
                font-size: 2.2rem;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta h2 {
                font-size: 1.8rem;
            }
            .hero-actions .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero p {
                font-size: 0.9rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card .number {
                font-size: 1.8rem;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .news-card {
                padding: 20px 22px;
            }
            .faq-item .faq-question {
                padding: 16px 20px;
                font-size: 0.9rem;
            }
            .faq-item .faq-answer-inner {
                padding: 0 20px 16px;
                font-size: 0.85rem;
            }
            .cta h2 {
                font-size: 1.5rem;
            }
            .category-card .card-body {
                padding: 18px 20px 22px;
            }
        }

        /* ===== 工具类 ===== */
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .gap-sm {
            gap: var(--gap-sm);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --primary-bg: rgba(108, 92, 231, 0.08);
            --secondary: #fd79a8;
            --secondary-dark: #e84393;
            --accent: #00cec9;
            --accent-dark: #00b894;
            --bg-main: #0f0e17;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-sidebar: #12101e;
            --bg-surface: #1e1e36;
            --text-primary: #f0f0f5;
            --text-secondary: #b0b0c8;
            --text-muted: #7777a0;
            --border-color: #2a2a4a;
            --border-light: #3a3a5a;
            --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 64px rgba(0, 0, 0, 0.5);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --max-width: 1280px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-main);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== 侧边栏 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
        }

        .sidebar-logo {
            padding: 24px 20px 16px;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .sidebar-logo a:hover {
            color: var(--primary-light);
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            padding: 12px 12px 8px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
            position: relative;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--primary-bg);
            color: var(--primary-light);
        }
        .sidebar-nav a:hover i {
            color: var(--primary-light);
        }
        .sidebar-nav a.active {
            background: var(--primary-bg);
            color: var(--primary-light);
            font-weight: 600;
        }
        .sidebar-nav a.active i {
            color: var(--primary);
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            font-size: 0.78rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
            padding-top: 0;
        }

        /* ===== 移动端菜单切换 ===== */
        .menu-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            width: 44px;
            height: 44px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.3rem;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--bg-card-hover);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Hero / 分类横幅 ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, var(--bg-sidebar) 0%, var(--bg-card) 50%, var(--bg-main) 100%);
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(108, 92, 231, 0.15), transparent 60%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            border: 1px solid rgba(108, 92, 231, 0.25);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary-light);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .category-hero .hero-badge i {
            font-size: 0.85rem;
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text-primary) 40%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }
        .category-hero .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .category-hero .hero-stats .stat-item {
            display: flex;
            flex-direction: column;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.2;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== 分类标签导航 ===== */
        .category-tabs {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 0 0;
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .category-tabs .tabs-inner {
            display: flex;
            gap: 4px;
            padding: 12px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .category-tabs .tabs-inner::-webkit-scrollbar {
            display: none;
        }
        .category-tabs .tab-btn {
            padding: 8px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-color);
            white-space: nowrap;
            transition: all var(--transition);
        }
        .category-tabs .tab-btn:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: var(--primary-bg);
        }
        .category-tabs .tab-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 资讯列表板块 ===== */
        .section-news {
            padding: 64px 0;
        }
        .section-news .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-news .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .section-news .section-header .section-more {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition);
        }
        .section-news .section-header .section-more:hover {
            color: var(--primary-light);
        }

        /* 资讯卡片网格 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-light);
            box-shadow: var(--shadow-md);
            background: var(--bg-card-hover);
        }
        .news-card .card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-surface);
        }
        .news-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .card-img img {
            transform: scale(1.05);
        }
        .news-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 100px;
            letter-spacing: 0.02em;
        }
        .news-card .card-img .card-date {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 0.72rem;
            padding: 4px 12px;
            border-radius: 100px;
            font-weight: 500;
        }
        .news-card .card-body {
            padding: 20px 22px 24px;
        }
        .news-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-body h3 a {
            color: var(--text-primary);
        }
        .news-card .card-body h3 a:hover {
            color: var(--primary-light);
        }
        .news-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .news-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .news-card .card-body .card-meta i {
            margin-right: 4px;
        }

        /* ===== 热门排行 ===== */
        .section-hot {
            padding: 64px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .section-hot .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-hot .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .hot-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .hot-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-main);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .hot-item:hover {
            border-color: var(--border-light);
            background: var(--bg-surface);
            transform: translateX(4px);
        }
        .hot-item .hot-rank {
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--text-muted);
            min-width: 32px;
            line-height: 1.2;
        }
        .hot-item:nth-child(1) .hot-rank,
        .hot-item:nth-child(2) .hot-rank,
        .hot-item:nth-child(3) .hot-rank {
            color: var(--primary);
        }
        .hot-item .hot-info {
            flex: 1;
        }
        .hot-item .hot-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .hot-item .hot-info h4 a {
            color: var(--text-primary);
        }
        .hot-item .hot-info h4 a:hover {
            color: var(--primary-light);
        }
        .hot-item .hot-info .hot-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hot-item .hot-info .hot-meta i {
            margin-right: 4px;
        }
        .hot-item .hot-thumb {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            background: var(--bg-surface);
            flex-shrink: 0;
        }

        /* ===== 评测专区 ===== */
        .section-reviews {
            padding: 64px 0;
        }
        .section-reviews .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-reviews .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .review-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .review-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .review-card:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
            background: var(--bg-card-hover);
        }
        .review-card .review-cover {
            width: 140px;
            min-height: 100px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            background: var(--bg-surface);
            flex-shrink: 0;
        }
        .review-card .review-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .review-card .review-body .review-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            background: rgba(0, 206, 201, 0.12);
            padding: 2px 10px;
            border-radius: 100px;
            width: fit-content;
            margin-bottom: 8px;
        }
        .review-card .review-body h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .review-card .review-body h3 a {
            color: var(--text-primary);
        }
        .review-card .review-body h3 a:hover {
            color: var(--primary-light);
        }
        .review-card .review-body p {
            font-size: 0.84rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }
        .review-card .review-body .review-score {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .review-card .review-body .review-score i {
            color: #f9ca24;
        }

        /* ===== 标签云 ===== */
        .section-tags {
            padding: 48px 0 64px;
        }
        .section-tags .section-header {
            margin-bottom: 28px;
        }
        .section-tags .section-header h2 {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud .tag-item {
            padding: 8px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 100px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .tag-cloud .tag-item:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .tag-cloud .tag-item .tag-count {
            color: var(--text-muted);
            margin-left: 4px;
            font-size: 0.75rem;
        }
        .tag-cloud .tag-item:hover .tag-count {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== FAQ ===== */
        .section-faq {
            padding: 64px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
        }
        .section-faq .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-faq .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.01em;
        }
        .section-faq .section-header p {
            color: var(--text-muted);
            max-width: 560px;
            margin: 12px auto 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-main);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--bg-surface);
        }
        .faq-item .faq-question i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .section-cta {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--bg-sidebar) 0%, var(--bg-card) 100%);
            border-top: 1px solid var(--border-color);
            text-align: center;
        }
        .section-cta h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }
        .section-cta p {
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .section-cta .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 100px;
            border: none;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(108, 92, 231, 0.4);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 100px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: var(--primary-bg);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer .footer-brand .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer .footer-brand .logo-link .logo-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
        }
        .footer .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer .footer-socials {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 0.95rem;
            transition: all var(--transition);
        }
        .footer .footer-socials a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .footer .footer-col h4 {
            font-size: 0.88rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .footer .footer-bottom a {
            color: var(--text-muted);
        }
        .footer .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .review-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .menu-toggle {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .category-hero {
                padding: 100px 0 48px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .category-hero .hero-stats {
                gap: 24px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.4rem;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .hot-list {
                grid-template-columns: 1fr;
            }
            .review-card {
                flex-direction: column;
            }
            .review-card .review-cover {
                width: 100%;
                height: 160px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-news,
            .section-hot,
            .section-reviews,
            .section-tags,
            .section-faq,
            .section-cta {
                padding: 40px 0;
            }
            .section-news .section-header h2,
            .section-hot .section-header h2,
            .section-reviews .section-header h2,
            .section-tags .section-header h2,
            .section-faq .section-header h2,
            .section-cta h2 {
                font-size: 1.4rem;
            }
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 0.88rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.84rem;
            }
            .category-tabs .tabs-inner {
                padding: 10px 0;
            }
            .category-tabs .tab-btn {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-stats {
                gap: 16px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.2rem;
            }
            .news-card .card-body {
                padding: 16px 18px 20px;
            }
            .hot-item {
                padding: 12px 16px;
            }
            .hot-item .hot-thumb {
                width: 56px;
                height: 56px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 0.88rem;
            }
            .section-cta p {
                font-size: 0.92rem;
            }
            .tag-cloud .tag-item {
                padding: 6px 14px;
                font-size: 0.76rem;
            }
        }

/* roulang page: article */
/* ===== CSS Variables ===== */
    :root {
        --primary: #7c3aed;
        --primary-light: #8b5cf6;
        --primary-dark: #6d28d9;
        --primary-bg: rgba(124, 58, 237, 0.08);
        --secondary: #f59e0b;
        --secondary-light: #fbbf24;
        --accent: #ec4899;
        --bg: #0f0f1a;
        --bg-card: #1a1a2e;
        --bg-card-hover: #222244;
        --bg-elevated: #252540;
        --bg-sidebar: #12121f;
        --surface: #1e1e36;
        --text: #f1f5f9;
        --text-secondary: #a1a1c2;
        --text-muted: #6b6b8a;
        --border: #2d2d50;
        --border-light: #3d3d66;
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
        --shadow-md: 0 8px 30px rgba(0,0,0,0.35);
        --shadow-lg: 0 20px 50px rgba(0,0,0,0.45);
        --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.15);
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --sidebar-width: 240px;
        --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    }

    /* ===== 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);
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 16px;
        min-height: 100vh;
        display: flex;
    }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--secondary); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    button, input, textarea { font-family: inherit; font-size: inherit; outline: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { color: var(--text-secondary); margin-bottom: 1rem; }
    .container {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Layout ===== */
    .app-wrapper {
        display: flex;
        width: 100%;
        min-height: 100vh;
    }

    /* ===== Sidebar (Left App Shell) ===== */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--sidebar-width);
        height: 100vh;
        background: var(--bg-sidebar);
        border-right: 1px solid var(--border);
        display: flex;
        flex-direction: column;
        z-index: 1000;
        transition: transform var(--transition);
        overflow-y: auto;
    }
    .sidebar-logo {
        padding: 20px 18px 14px;
        border-bottom: 1px solid var(--border);
    }
    .sidebar-logo a {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text);
        font-size: 1.15rem;
        font-weight: 700;
        letter-spacing: 0.3px;
    }
    .sidebar-logo a:hover { color: var(--primary-light); }
    .logo-icon {
        width: 38px;
        height: 38px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: #fff;
        flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    }
    .sidebar-nav {
        flex: 1;
        padding: 16px 12px;
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    .nav-label {
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 1.5px;
        color: var(--text-muted);
        padding: 8px 10px 6px;
        font-weight: 600;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 14px;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        font-size: 0.95rem;
        font-weight: 500;
        transition: all var(--transition);
        position: relative;
    }
    .sidebar-nav a i {
        width: 20px;
        text-align: center;
        font-size: 1rem;
        flex-shrink: 0;
    }
    .sidebar-nav a:hover {
        background: var(--primary-bg);
        color: var(--primary-light);
    }
    .sidebar-nav a.active {
        background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(236, 72, 153, 0.1));
        color: var(--text);
        font-weight: 600;
        border-left: 3px solid var(--primary);
    }
    .sidebar-nav a.active::before {
        content: '';
        position: absolute;
        left: -12px;
        top: 50%;
        transform: translateY(-50%);
        width: 4px;
        height: 24px;
        background: var(--primary);
        border-radius: 0 4px 4px 0;
    }
    .sidebar-footer {
        padding: 16px 18px;
        border-top: 1px solid var(--border);
        font-size: 0.75rem;
        color: var(--text-muted);
        text-align: center;
    }

    /* ===== Main Content Area ===== */
    .main-content {
        margin-left: var(--sidebar-width);
        flex: 1;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        width: calc(100% - var(--sidebar-width));
    }

    /* ===== Mobile Header (for sidebar toggle) ===== */
    .mobile-header {
        display: none;
        position: sticky;
        top: 0;
        z-index: 999;
        background: var(--bg-sidebar);
        padding: 12px 20px;
        border-bottom: 1px solid var(--border);
        align-items: center;
        justify-content: space-between;
    }
    .mobile-header .logo-link {
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text);
        font-weight: 700;
        font-size: 1rem;
    }
    .mobile-header .logo-link .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    .menu-toggle {
        background: none;
        border: none;
        color: var(--text);
        font-size: 1.4rem;
        cursor: pointer;
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        transition: background var(--transition);
    }
    .menu-toggle:hover { background: var(--primary-bg); }

    /* ===== Sidebar Overlay (mobile) ===== */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.6);
        z-index: 999;
        backdrop-filter: blur(4px);
    }

    /* ===== Article Detail ===== */
    .article-detail {
        flex: 1;
        padding: 40px 0 60px;
    }
    .article-header {
        text-align: center;
        max-width: 800px;
        margin: 0 auto 40px;
        padding: 0 20px;
    }
    .article-category {
        display: inline-block;
        background: var(--primary-bg);
        color: var(--primary-light);
        font-size: 0.8rem;
        font-weight: 600;
        padding: 4px 16px;
        border-radius: 20px;
        margin-bottom: 16px;
        letter-spacing: 0.5px;
        border: 1px solid rgba(124, 58, 237, 0.2);
    }
    .article-header h1 {
        font-size: 2.4rem;
        line-height: 1.3;
        margin-bottom: 16px;
        background: linear-gradient(135deg, var(--text), var(--primary-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .article-meta {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 20px;
        color: var(--text-muted);
        font-size: 0.85rem;
        flex-wrap: wrap;
    }
    .article-meta span {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta i {
        color: var(--primary-light);
    }
    .article-cover {
        max-width: 800px;
        margin: 0 auto 32px;
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-md);
        aspect-ratio: 16/9;
        background: var(--bg-card);
    }
    .article-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .article-body {
        max-width: 760px;
        margin: 0 auto;
        padding: 0 20px;
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--text-secondary);
    }
    .article-body p {
        margin-bottom: 1.2rem;
    }
    .article-body h2, .article-body h3 {
        margin-top: 2rem;
        margin-bottom: 0.8rem;
        color: var(--text);
    }
    .article-body ul, .article-body ol {
        margin-bottom: 1.2rem;
        padding-left: 1.5rem;
        color: var(--text-secondary);
    }
    .article-body li {
        margin-bottom: 0.4rem;
        list-style: disc;
    }
    .article-body ol li {
        list-style: decimal;
    }
    .article-body blockquote {
        border-left: 4px solid var(--primary);
        padding: 12px 20px;
        margin: 1.5rem 0;
        background: var(--primary-bg);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-body code {
        background: var(--bg-elevated);
        padding: 2px 8px;
        border-radius: 4px;
        font-family: var(--font-mono);
        font-size: 0.9em;
        color: var(--secondary);
    }
    .article-body pre {
        background: var(--bg-card);
        padding: 20px;
        border-radius: var(--radius-md);
        overflow-x: auto;
        margin: 1.5rem 0;
        border: 1px solid var(--border);
    }
    .article-body pre code {
        background: none;
        padding: 0;
        color: var(--text-secondary);
    }
    .article-body img {
        border-radius: var(--radius-md);
        margin: 1.5rem auto;
        box-shadow: var(--shadow-sm);
    }
    .article-body a {
        color: var(--secondary);
        text-decoration: underline;
        text-underline-offset: 2px;
    }
    .article-body a:hover {
        color: var(--secondary-light);
    }
    .article-divider {
        max-width: 600px;
        margin: 40px auto;
        border: none;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--border-light), transparent);
    }
    .article-footer-nav {
        max-width: 760px;
        margin: 0 auto;
        padding: 0 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 16px;
    }
    .article-footer-nav a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        border-radius: var(--radius-sm);
        background: var(--bg-card);
        border: 1px solid var(--border);
        color: var(--text-secondary);
        font-weight: 500;
        transition: all var(--transition);
    }
    .article-footer-nav a:hover {
        background: var(--primary-bg);
        border-color: var(--primary);
        color: var(--primary-light);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }
    .article-tags {
        max-width: 760px;
        margin: 32px auto 0;
        padding: 0 20px;
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }
    .article-tags .tag {
        background: var(--bg-card);
        border: 1px solid var(--border);
        padding: 4px 16px;
        border-radius: 20px;
        font-size: 0.8rem;
        color: var(--text-secondary);
        transition: all var(--transition);
    }
    .article-tags .tag:hover {
        background: var(--primary-bg);
        border-color: var(--primary-light);
        color: var(--primary-light);
    }

    /* ===== Not Found ===== */
    .not-found {
        text-align: center;
        padding: 80px 20px;
    }
    .not-found .icon {
        font-size: 4rem;
        color: var(--text-muted);
        margin-bottom: 24px;
        opacity: 0.5;
    }
    .not-found h2 {
        font-size: 2rem;
        margin-bottom: 12px;
        color: var(--text);
    }
    .not-found p {
        color: var(--text-muted);
        margin-bottom: 28px;
        font-size: 1.1rem;
    }
    .not-found .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 32px;
        background: var(--primary);
        color: #fff;
        border-radius: var(--radius-sm);
        font-weight: 600;
        transition: all var(--transition);
    }
    .not-found .btn:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: var(--shadow-glow);
        color: #fff;
    }

    /* ===== Related Articles ===== */
    .related-section {
        padding: 60px 0 40px;
        border-top: 1px solid var(--border);
        margin-top: 20px;
    }
    .related-section h2 {
        text-align: center;
        margin-bottom: 36px;
        font-size: 1.6rem;
    }
    .related-section h2 span {
        color: var(--primary-light);
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 24px;
    }
    .related-card {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition);
    }
    .related-card:hover {
        transform: translateY(-4px);
        border-color: var(--primary);
        box-shadow: var(--shadow-glow);
    }
    .related-card .card-img {
        width: 100%;
        aspect-ratio: 16/9;
        object-fit: cover;
        background: var(--bg-elevated);
    }
    .related-card .card-body {
        padding: 16px 20px 20px;
    }
    .related-card .card-body h3 {
        font-size: 1rem;
        margin-bottom: 6px;
        line-height: 1.4;
        color: var(--text);
    }
    .related-card .card-body h3 a { color: var(--text); }
    .related-card .card-body h3 a:hover { color: var(--primary-light); }
    .related-card .card-body .meta {
        font-size: 0.8rem;
        color: var(--text-muted);
        display: flex;
        gap: 12px;
    }

    /* ===== Footer ===== */
    .footer {
        background: var(--bg-sidebar);
        border-top: 1px solid var(--border);
        padding: 50px 0 30px;
        margin-top: auto;
    }
    .footer .container { max-width: 1200px; }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 32px;
    }
    .footer-brand .logo-link {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        color: var(--text);
        font-weight: 700;
        font-size: 1.15rem;
        margin-bottom: 14px;
    }
    .footer-brand p {
        font-size: 0.88rem;
        color: var(--text-muted);
        max-width: 320px;
        line-height: 1.6;
    }
    .footer-socials {
        display: flex;
        gap: 12px;
        margin-top: 16px;
    }
    .footer-socials a {
        width: 38px;
        height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        background: var(--bg-card);
        color: var(--text-secondary);
        border: 1px solid var(--border);
        transition: all var(--transition);
        font-size: 1rem;
    }
    .footer-socials a:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
        transform: translateY(-2px);
    }
    .footer-col h4 {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--text);
        margin-bottom: 14px;
        letter-spacing: 0.5px;
    }
    .footer-col a {
        display: block;
        color: var(--text-muted);
        font-size: 0.85rem;
        padding: 4px 0;
        transition: color var(--transition);
    }
    .footer-col a:hover { color: var(--primary-light); }
    .footer-bottom {
        border-top: 1px solid var(--border);
        padding-top: 22px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.8rem;
        color: var(--text-muted);
    }
    .footer-bottom a {
        color: var(--text-muted);
        font-weight: 500;
    }
    .footer-bottom a:hover { color: var(--primary-light); }

    /* ===== Sidebar Open Class (mobile) ===== */
    .sidebar-open .sidebar {
        transform: translateX(0);
    }
    .sidebar-open .sidebar-overlay {
        display: block;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .article-header h1 { font-size: 2rem; }
    }

    @media (max-width: 768px) {
        .sidebar {
            transform: translateX(-100%);
        }
        .mobile-header {
            display: flex;
        }
        .main-content {
            margin-left: 0;
            width: 100%;
        }
        .article-detail { padding: 24px 0 40px; }
        .article-header h1 { font-size: 1.6rem; }
        .article-header { margin-bottom: 28px; }
        .article-body { font-size: 1rem; }
        .article-meta { gap: 12px; font-size: 0.8rem; }
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .related-grid { grid-template-columns: 1fr; }
        .article-footer-nav { flex-direction: column; align-items: center; }
    }

    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-header h1 { font-size: 1.35rem; }
        .article-body { padding: 0 4px; font-size: 0.95rem; }
        .article-meta { flex-direction: column; gap: 6px; }
        .article-meta span { font-size: 0.75rem; }
        .article-category { font-size: 0.7rem; padding: 3px 12px; }
        .article-cover { border-radius: var(--radius-md); }
        .not-found h2 { font-size: 1.5rem; }
        .not-found .icon { font-size: 3rem; }
    }

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

    /* ===== Focus & Accessibility ===== */
    a:focus-visible, button:focus-visible, input:focus-visible {
        outline: 2px solid var(--primary-light);
        outline-offset: 2px;
    }