/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-canvas: #f8fafc;
            --border-soft: #e2e8f0;
            --card-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.05);
            --card-hover-shadow: 0 12px 32px -6px rgba(37, 99, 235, 0.12);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        .glass-nav {
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }
        .card-lift {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-lift:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-hover-shadow);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.025em;
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-canvas: #f8fafc;
            --border-soft: #e2e8f0;
            --card-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.05);
            --card-hover-shadow: 0 12px 32px -6px rgba(37, 99, 235, 0.12);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        .glass-nav {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }
        .card-lift {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-lift:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-hover-shadow);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.025em;
        }
        .filter-btn-active {
            background-color: #2563eb;
            color: #ffffff;
            font-weight: 600;
        }
        .filter-btn {
            background-color: #ffffff;
            color: #475569;
            border: 1px solid #e2e8f0;
            transition: all 0.2s ease;
        }
        .filter-btn:hover {
            border-color: #cbd5e1;
            color: #0f172a;
        }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-canvas: #f8fafc;
            --border-soft: #e2e8f0;
            --card-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.05);
            --card-hover-shadow: 0 12px 32px -6px rgba(37, 99, 235, 0.12);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        .glass-nav {
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }
        .card-lift {
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-lift:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-hover-shadow);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.025em;
        }
        /* 文章排版系统 */
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #0f172a;
            margin-top: 2.25rem;
            margin-bottom: 1rem;
            padding-left: 0.875rem;
            border-left: 4px solid var(--primary);
            line-height: 1.35;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #1e293b;
            margin-top: 1.75rem;
            margin-bottom: 0.75rem;
            display: flex;
            align-items: center;
            line-height: 1.4;
        }
        .article-body h3::before {
            content: "";
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 9999px;
            background-color: var(--primary);
            margin-right: 0.625rem;
        }
        .article-body p {
            color: #334155;
            font-size: 1.025rem;
            line-height: 1.85;
            margin-bottom: 1.25rem;
        }
        .article-body blockquote {
            margin: 1.75rem 0;
            padding: 1.25rem 1.5rem;
            background-color: #f1f5f9;
            border-left: 4px solid #3b82f6;
            border-radius: 0 0.75rem 0.75rem 0;
            color: #475569;
            font-style: italic;
        }
        .article-body ul, .article-body ol {
            margin: 1.25rem 0;
            padding-left: 1.5rem;
            color: #334155;
            line-height: 1.8;
        }
        .article-body ul {
            list-style-type: disc;
        }
        .article-body ol {
            list-style-type: decimal;
        }
        .article-body table {
            width: 100%;
            margin: 1.5rem 0;
            border-collapse: collapse;
            font-size: 0.875rem;
        }
        .article-body th, .article-body td {
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-soft);
            text-align: left;
        }
        .article-body th {
            background-color: #f8fafc;
            color: #0f172a;
            font-weight: 700;
        }