/* roulang page: index */
:root {
            --brand-primary: #4f46e5;
            --brand-primary-dark: #3730a3;
            --brand-primary-light: #818cf8;
            --cosmic-primary: #0ea5e9;
            --cosmic-dark: #0369a1;
            --warm-accent: #f59e0b;
            --bg-light: #f8fafc;
            --bg-dark: #0f172a;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --border-color: #e2e8f0;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button, input, textarea {
            font-family: inherit;
            transition: var(--transition);
        }

        button:focus, input:focus, textarea:focus {
            outline: 2px solid var(--brand-primary);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding: 0 2rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding: 0 2.5rem;
            }
        }

        .fade-in {
            opacity: 0;
            transform: translateY(24px);
            animation: fadeInUp 0.7s ease forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .stagger-1 { animation-delay: 0.1s; }
        .stagger-2 { animation-delay: 0.2s; }
        .stagger-3 { animation-delay: 0.3s; }
        .stagger-4 { animation-delay: 0.4s; }
        .stagger-5 { animation-delay: 0.5s; }

        .card-hover {
            transition: var(--transition);
        }
        .card-hover:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .glass-effect {
            background: rgba(255,255,255,0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.3);
        }

        .gradient-brand {
            background: linear-gradient(135deg, #4f46e5 0%, #0ea5e9 100%);
        }

        .gradient-warm {
            background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
        }

        .gradient-cosmic {
            background: linear-gradient(135deg, #0ea5e9 0%, #8b5cf6 100%);
        }

        .text-gradient {
            background: linear-gradient(135deg, #4f46e5, #0ea5e9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        .badge-blue {
            background: #dbeafe;
            color: #1d4ed8;
        }

        .badge-purple {
            background: #ede9fe;
            color: #7c3aed;
        }

        .badge-amber {
            background: #fef3c7;
            color: #b45309;
        }

        .badge-green {
            background: #d1fae5;
            color: #047857;
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: #0f172a;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: var(--brand-primary);
            color: #fff;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(79,70,229,0.35);
        }
        .btn-primary:hover {
            background: var(--brand-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(79,70,229,0.45);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: transparent;
            color: var(--brand-primary);
            border: 2px solid var(--brand-primary);
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--brand-primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(79,70,229,0.25);
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            background: #fff;
            color: var(--brand-primary);
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(0,0,0,0.08);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.15);
        }

        .nav-link {
            position: relative;
            font-weight: 500;
            padding: 0.25rem 0;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--brand-primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--brand-primary);
        }
        .nav-link.active::after {
            width: 100%;
        }

        .channel-link {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            border-radius: 9999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .channel-link:hover {
            color: var(--brand-primary);
            background: rgba(79,70,229,0.08);
            border-color: rgba(79,70,229,0.15);
        }
        .channel-link.active {
            color: #fff;
            background: var(--brand-primary);
            border-color: var(--brand-primary);
            box-shadow: 0 4px 12px rgba(79,70,229,0.3);
        }

        .footer-link {
            color: var(--text-light);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--brand-primary-light);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 1.25rem 0;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            color: #0f172a;
        }
        .faq-question i {
            color: var(--brand-primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 0.75rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .stat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .tag-item {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 9999px;
            font-size: 0.8rem;
            font-weight: 500;
            background: #f1f5f9;
            color: var(--text-secondary);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .tag-item:hover {
            background: #e0e7ff;
            color: var(--brand-primary);
            border-color: var(--brand-primary-light);
        }

        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .mobile-menu.open {
            max-height: 400px;
        }

        .article-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .article-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: linear-gradient(135deg, #e0e7ff, #bae6fd);
        }
        .article-card .card-body {
            padding: 1.25rem;
        }
        .article-card .card-title {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.5;
            color: #0f172a;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-excerpt {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 0.75rem;
        }

        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }
        .feature-card .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            font-size: 1.5rem;
            color: #fff;
        }

        @media (max-width: 639px) {
            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
            .stat-card {
                padding: 1.25rem 1rem;
            }
            .feature-card {
                padding: 1.5rem 1rem;
            }
            .article-card .card-img {
                height: 140px;
            }
            .btn-primary, .btn-outline, .btn-white {
                padding: 0.65rem 1.5rem;
                font-size: 0.9rem;
            }
        }

        .hero-wave {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: var(--bg-light);
            clip-path: ellipse(70% 100% at 50% 100%);
        }

        @media (min-width: 768px) {
            .hero-wave {
                height: 120px;
                clip-path: ellipse(60% 100% at 50% 100%);
            }
        }

        .search-box {
            display: flex;
            align-items: center;
            background: #fff;
            border-radius: 9999px;
            padding: 0.4rem 0.4rem 0.4rem 1.5rem;
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
            border: 1px solid #e2e8f0;
            transition: var(--transition);
            max-width: 500px;
        }
        .search-box:focus-within {
            box-shadow: 0 4px 24px rgba(79,70,229,0.15);
            border-color: var(--brand-primary-light);
        }
        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            padding: 0.6rem 0;
            font-size: 0.95rem;
            background: transparent;
            color: var(--text-primary);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box button {
            background: var(--brand-primary);
            color: #fff;
            border: none;
            border-radius: 9999px;
            padding: 0.6rem 1.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-box button:hover {
            background: var(--brand-primary-dark);
        }

        .cms-empty {
            text-align: center;
            padding: 2.5rem 1rem;
            color: var(--text-light);
            font-size: 1rem;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-color);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --brand-50: #eef2ff;
            --brand-100: #e0e7ff;
            --brand-200: #c7d2fe;
            --brand-300: #a5b4fc;
            --brand-400: #818cf8;
            --brand-500: #6366f1;
            --brand-600: #4f46e5;
            --brand-700: #4338ca;
            --brand-800: #3730a3;
            --brand-900: #312e81;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --gray-900: #111827;
            --text-primary: #1f2937;
            --text-secondary: #4b5563;
            --text-muted: #9ca3af;
            --border-color: #e5e7eb;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-full: 9999px;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 10px 25px rgba(0, 0, 0, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
            --shadow-nav: 0 1px 3px rgba(0, 0, 0, 0.04);
            --transition: all 0.25s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: #ffffff;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        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(--gray-900);
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        @media (min-width: 1280px) {
            .container-custom {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* ===== 文字渐变 ===== */
        .text-gradient {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* ===== 品牌色实用类 ===== */
        .bg-brand-50 {
            background-color: var(--brand-50);
        }
        .bg-brand-100 {
            background-color: var(--brand-100);
        }
        .bg-brand-500 {
            background-color: var(--brand-500);
        }
        .bg-brand-600 {
            background-color: var(--brand-600);
        }
        .text-brand-50 {
            color: var(--brand-50);
        }
        .text-brand-500 {
            color: var(--brand-500);
        }
        .text-brand-600 {
            color: var(--brand-600);
        }
        .text-brand-700 {
            color: var(--brand-700);
        }
        .border-brand-200 {
            border-color: var(--brand-200);
        }
        .hover\:bg-brand-600:hover {
            background-color: var(--brand-600);
        }
        .hover\:text-brand-500:hover {
            color: var(--brand-500);
        }

        /* ===== 导航频道链接 ===== */
        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--gray-600);
            border-radius: var(--radius-full);
            transition: var(--transition);
            white-space: nowrap;
        }
        .channel-link i {
            font-size: 0.8rem;
            opacity: 0.7;
        }
        .channel-link:hover {
            color: var(--brand-600);
            background: var(--brand-50);
        }
        .channel-link.active {
            color: #fff;
            background: var(--brand-500);
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
        }
        .channel-link.active i {
            opacity: 1;
        }
        .channel-link.active:hover {
            background: var(--brand-600);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            border-radius: var(--radius-full);
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.25);
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(99, 102, 241, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--brand-600);
            background: transparent;
            border: 2px solid var(--brand-200);
            border-radius: var(--radius-full);
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--brand-50);
            border-color: var(--brand-400);
            transform: translateY(-2px);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--gray-600);
            border-radius: var(--radius-full);
            transition: var(--transition);
        }
        .btn-ghost:hover {
            background: var(--gray-100);
            color: var(--gray-900);
        }

        /* ===== 卡片 ===== */
        .card-base {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid var(--gray-100);
        }
        .card-base:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--brand-100);
        }

        /* ===== 标签/徽章 ===== */
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--brand-700);
            background: var(--brand-50);
            border-radius: var(--radius-full);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--brand-100);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 10px;
            font-size: 0.75rem;
            font-weight: 600;
            color: #fff;
            background: var(--brand-500);
            border-radius: var(--radius-full);
        }

        /* ===== 统计数字块 ===== */
        .stat-item {
            text-align: center;
            padding: 16px 12px;
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--brand-600);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--gray-500);
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--gray-100);
            padding: 18px 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--gray-800);
            cursor: pointer;
            padding: 4px 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--brand-600);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--gray-400);
            transition: var(--transition);
        }
        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--brand-500);
        }
        .faq-answer {
            padding-top: 10px;
            font-size: 0.95rem;
            color: var(--gray-600);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        /* ===== 滚动条隐藏 ===== */
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding-top: 0;
            padding-bottom: 0;
        }
        .mobile-menu.open {
            max-height: 400px;
            padding-top: 12px;
            padding-bottom: 16px;
        }

        /* ===== 分割线 ===== */
        .divider-light {
            height: 1px;
            background: var(--gray-100);
            margin: 0;
            border: none;
        }

        /* ===== 图片占位装饰 ===== */
        .img-placeholder {
            background: linear-gradient(135deg, var(--brand-100), #ede9fe);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-400);
            font-size: 2rem;
            min-height: 160px;
        }

        /* ===== 资源卡片图标 ===== */
        .resource-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        /* ===== 页脚链接 ===== */
        .footer-link {
            color: var(--gray-400);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: #fff;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .stat-number {
                font-size: 1.8rem;
            }
            .channel-link {
                padding: 5px 12px;
                font-size: 0.8rem;
            }
            .channel-link i {
                font-size: 0.7rem;
                margin-right: 2px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
        }

        /* ===== focus 可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 自定义滚动条（桌面） ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--gray-50);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--gray-300);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--gray-400);
        }

        /* ===== Tailwind 补充 ===== */
        .bg-gray-50 {
            background-color: var(--gray-50);
        }
        .bg-gray-100 {
            background-color: var(--gray-100);
        }
        .bg-gray-800 {
            background-color: var(--gray-800);
        }
        .bg-gray-900 {
            background-color: var(--gray-900);
        }
        .text-gray-400 {
            color: var(--gray-400);
        }
        .text-gray-500 {
            color: var(--gray-500);
        }
        .text-gray-600 {
            color: var(--gray-600);
        }
        .text-gray-700 {
            color: var(--gray-700);
        }
        .text-gray-900 {
            color: var(--gray-900);
        }
        .border-gray-100 {
            border-color: var(--gray-100);
        }
        .border-gray-200 {
            border-color: var(--gray-200);
        }
        .hover\:bg-gray-100:hover {
            background-color: var(--gray-100);
        }
        .hover\:text-white:hover {
            color: #fff;
        }

/* roulang page: article */
:root {
            --brand-50: #eef2ff; --brand-100: #e0e7ff; --brand-200: #c7d2fe; --brand-300: #a5b4fc; --brand-400: #818cf8; --brand-500: #6366f1; --brand-600: #4f46e5; --brand-700: #4338ca; --brand-800: #3730a3; --brand-900: #312e81; --brand-950: #1e1b4b;
            --text-primary: #1e293b; --text-secondary: #475569; --text-muted: #94a3b8; --bg-body: #f8fafc; --bg-card: #ffffff; --border-light: #e2e8f0; --radius-lg: 1rem; --radius-md: 0.75rem; --radius-sm: 0.5rem; --shadow-card: 0 4px 24px rgba(0,0,0,0.06); --shadow-hover: 0 12px 40px rgba(99,102,241,0.12);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; color: var(--text-primary); background: var(--bg-body); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        .container-custom { max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }
        .text-gradient { background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
        .scrollbar-hide::-webkit-scrollbar { display: none; }
        .channel-link { display: inline-flex; align-items: center; padding: 0.5rem 1rem; border-radius: 9999px; font-size: 0.875rem; font-weight: 500; color: #64748b; transition: all 0.2s; white-space: nowrap; }
        .channel-link:hover { background: #f1f5f9; color: #1e293b; }
        .channel-link.active { background: var(--brand-50); color: var(--brand-700); font-weight: 600; }
        .btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1.75rem; border-radius: 9999px; font-weight: 600; font-size: 0.9375rem; color: #fff; background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%); border: none; cursor: pointer; transition: all 0.25s; box-shadow: 0 4px 16px rgba(99,102,241,0.35); text-decoration: none; }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(99,102,241,0.45); }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.65rem 1.5rem; border-radius: 9999px; font-weight: 600; font-size: 0.875rem; color: var(--brand-600); background: transparent; border: 2px solid var(--brand-200); cursor: pointer; transition: all 0.25s; text-decoration: none; }
        .btn-outline:hover { background: var(--brand-50); border-color: var(--brand-400); transform: translateY(-1px); }
        .footer-link { color: #94a3b8; font-size: 0.875rem; text-decoration: none; transition: color 0.2s; }
        .footer-link:hover { color: #f1f5f9; }
        .mobile-menu { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
        .mobile-menu.open { max-height: 400px; }
        .article-prose { font-size: 1.0625rem; line-height: 1.85; color: #1e293b; }
        .article-prose p { margin-bottom: 1.25rem; }
        .article-prose h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2rem; margin-bottom: 0.75rem; color: #0f172a; }
        .article-prose h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.5rem; color: #0f172a; }
        .article-prose ul, .article-prose ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
        .article-prose li { margin-bottom: 0.375rem; }
        .article-prose a { color: var(--brand-600); text-decoration: underline; text-underline-offset: 2px; }
        .article-prose a:hover { color: var(--brand-800); }
        .article-prose img { border-radius: var(--radius-md); margin: 1.5rem 0; max-width: 100%; height: auto; box-shadow: var(--shadow-card); }
        .article-prose blockquote { border-left: 4px solid var(--brand-300); padding-left: 1.25rem; margin: 1.5rem 0; color: #475569; font-style: italic; background: #f8fafc; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 1rem 1.5rem; }
        .faq-item { border-bottom: 1px solid var(--border-light); padding: 1.25rem 0; }
        .faq-item:last-child { border-bottom: none; }
        .faq-question { font-weight: 600; font-size: 1.0625rem; color: #0f172a; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
        .faq-answer { margin-top: 0.75rem; color: #475569; font-size: 0.9375rem; line-height: 1.7; display: none; }
        .faq-answer.open { display: block; }
        @media (max-width: 768px) {
            .container-custom { padding: 0 1rem; }
            .channel-link { font-size: 0.8125rem; padding: 0.375rem 0.75rem; }
            .article-prose { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .container-custom { padding: 0 0.75rem; }
            .channel-link { font-size: 0.75rem; padding: 0.25rem 0.625rem; }
        }
        .tag-badge { display: inline-block; padding: 0.25rem 0.75rem; border-radius: 9999px; font-size: 0.75rem; font-weight: 500; background: #eef2ff; color: #4f46e5; transition: all 0.2s; }
        .tag-badge:hover { background: #e0e7ff; transform: translateY(-1px); }
        .card-hover { transition: all 0.3s; }
        .card-hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .share-btn { width: 2.5rem; height: 2.5rem; border-radius: 9999px; display: inline-flex; align-items: center; justify-content: center; background: #f1f5f9; color: #64748b; transition: all 0.2s; text-decoration: none; font-size: 0.9375rem; }
        .share-btn:hover { background: var(--brand-100); color: var(--brand-600); transform: translateY(-2px); }
        .breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8125rem; color: #94a3b8; flex-wrap: wrap; }
        .breadcrumb a { color: #64748b; text-decoration: none; transition: color 0.2s; }
        .breadcrumb a:hover { color: var(--brand-600); }
        .breadcrumb span { color: #94a3b8; }
        .meta-divider { width: 4px; height: 4px; border-radius: 50%; background: #cbd5e1; display: inline-block; margin: 0 0.5rem; }
        @media (max-width: 640px) {
            .breadcrumb { font-size: 0.75rem; }
            .meta-divider { margin: 0 0.25rem; }
        }