/* roulang page: index */
:root {
            --brand-main: #0F172A;
            --brand-cyan: #0E7490;
            --brand-teal: #14B8A6;
            --brand-teal-hover: #0D9488;
            --brand-amber: #F59E0B;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-soft: #E2E8F0;
            --border-dark: #334155;
            --radius-box: 1rem;
            --radius-btn: 0.5rem;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.6;
        }

        .font-mono-data {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
            font-variant-numeric: tabular-nums;
        }

        .hero-glow-bg {
            background: radial-gradient(circle at 50% 15%, rgba(20, 184, 166, 0.12) 0%, rgba(14, 116, 144, 0.05) 45%, rgba(248, 250, 252, 0) 80%);
        }

        .dark-card-board {
            background: linear-gradient(145deg, #111e33 0%, #0c1626 100%);
            border: 1px solid #1e293b;
        }

        .transition-default {
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-hover-lift:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
        }

        .code-screen {
            background-color: #0b1120;
            border: 1px solid #1e293b;
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.6);
        }

/* roulang page: category1 */
:root {
            --brand-main: #0F172A;
            --brand-cyan: #0E7490;
            --brand-teal: #14B8A6;
            --brand-teal-hover: #0D9488;
            --brand-amber: #F59E0B;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-soft: #E2E8F0;
            --border-dark: #334155;
            --radius-box: 1rem;
            --radius-btn: 0.5rem;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.6;
        }
        .font-mono-data {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
            font-variant-numeric: tabular-nums;
        }
        .hero-glow-bg {
            background: radial-gradient(circle at 50% 15%, rgba(20, 184, 166, 0.12) 0%, rgba(14, 116, 144, 0.05) 45%, rgba(248, 250, 252, 0) 80%);
        }
        .dark-card-board {
            background: linear-gradient(145deg, #111e33 0%, #0c1626 100%);
            border: 1px solid #1e293b;
        }
        .card-hover-lift {
            transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover-lift:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
        }
        .transition-default {
            transition: all 0.2s ease-in-out;
        }

/* roulang page: article */
:root {
            --brand-main: #0F172A;
            --brand-cyan: #0E7490;
            --brand-teal: #14B8A6;
            --brand-teal-hover: #0D9488;
            --brand-amber: #F59E0B;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-soft: #E2E8F0;
            --border-dark: #334155;
            --radius-box: 1rem;
            --radius-btn: 0.5rem;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.6;
        }
        .font-mono-data {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
            font-variant-numeric: tabular-nums;
        }
        .hero-glow-bg {
            background: radial-gradient(circle at 50% 15%, rgba(20, 184, 166, 0.12) 0%, rgba(14, 116, 144, 0.05) 45%, rgba(248, 250, 252, 0) 80%);
        }
        .dark-card-board {
            background: linear-gradient(145deg, #111e33 0%, #0c1626 100%);
            border: 1px solid #1e293b;
        }
        .card-hover-lift {
            transition: all 0.2s ease-in-out;
        }
        .card-hover-lift:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
        }
        .transition-default {
            transition: all 0.2s ease-in-out;
        }
        /* Prose customization */
        .article-content {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: #334155;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0f172a;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #e2e8f0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .article-content h2::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 1.25rem;
            background-color: #0d9488;
            border-radius: 2px;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #0f172a;
            margin-top: 1.75rem;
            margin-bottom: 0.75rem;
        }
        .article-content p {
            margin-bottom: 1.25rem;
            text-align: justify;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.25rem;
            padding-left: 1.5rem;
        }
        .article-content ul {
            list-style-type: disc;
        }
        .article-content ol {
            list-style-type: decimal;
        }
        .article-content li {
            margin-bottom: 0.5rem;
        }
        .article-content blockquote {
            border-left: 4px solid #14b8a6;
            background-color: #f0fdfa;
            padding: 1rem 1.25rem;
            margin: 1.5rem 0;
            border-radius: 0 0.5rem 0.5rem 0;
            color: #0f766e;
            font-size: 0.975rem;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.925rem;
        }
        .article-content th, .article-content td {
            border: 1px solid #e2e8f0;
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .article-content th {
            background-color: #f8fafc;
            color: #0f172a;
            font-weight: 600;
        }
        .article-content code {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            background-color: #f1f5f9;
            color: #0e7490;
            padding: 0.2rem 0.4rem;
            border-radius: 0.25rem;
            font-size: 0.875em;
        }