/* roulang page: index */
:root {
            --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #E11D48 100%);
            --accent-orange: #F59E0B;
            --accent-cyan: #06B6D4;
            --bg-canvas: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --card-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(226, 232, 240, 0.8);
            --card-shadow-hover: 0 20px 40px -10px rgba(79, 70, 229, 0.15), 0 0 0 1px rgba(79, 70, 229, 0.3);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .brand-gradient-text {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .brand-gradient-bg {
            background: var(--primary-gradient);
        }
        .custom-card {
            background: #FFFFFF;
            border-radius: 1.5rem;
            box-shadow: var(--card-shadow);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .custom-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .badge-glow {
            box-shadow: 0 0 15px rgba(245, 158, 11, 0.25);
        }
        .nav-link {
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary-gradient);
            transition: width 0.25s ease;
            border-radius: 9999px;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .bento-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 1.5rem;
        }
        details summary::-webkit-details-marker {
            display: none;
        }

/* roulang page: article */
:root {
            --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #E11D48 100%);
            --accent-orange: #F59E0B;
            --accent-cyan: #06B6D4;
            --bg-canvas: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --card-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(226, 232, 240, 0.8);
            --card-shadow-hover: 0 20px 40px -10px rgba(79, 70, 229, 0.15), 0 0 0 1px rgba(79, 70, 229, 0.3);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .brand-gradient-text {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .brand-gradient-bg {
            background: var(--primary-gradient);
        }
        .custom-card {
            background: #FFFFFF;
            border-radius: 1.5rem;
            box-shadow: var(--card-shadow);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .custom-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .badge-glow {
            box-shadow: 0 0 15px rgba(245, 158, 11, 0.25);
        }
        .nav-link {
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary-gradient);
            transition: width 0.25s ease;
            border-radius: 9999px;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .article-content {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: #334155;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #0F172A;
            margin-top: 2.5rem;
            margin-bottom: 1.25rem;
            position: relative;
            padding-left: 1rem;
            border-left: 4px solid #4F46E5;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #1E293B;
            margin-top: 1.75rem;
            margin-bottom: 0.75rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
            text-align: justify;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }
        .article-content li {
            margin-bottom: 0.5rem;
            list-style-type: disc;
        }
        .article-content blockquote {
            background: #F1F5F9;
            border-left: 4px solid #F59E0B;
            padding: 1rem 1.25rem;
            border-radius: 0.75rem;
            margin: 1.75rem 0;
            color: #475569;
            font-style: italic;
        }
        .article-content img {
            border-radius: 1rem;
            box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
            margin: 2rem auto;
            max-width: 100%;
            height: auto;
        }

/* roulang page: category1 */
:root {
            --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #E11D48 100%);
            --accent-orange: #F59E0B;
            --accent-cyan: #06B6D4;
            --bg-canvas: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --card-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(226, 232, 240, 0.8);
            --card-shadow-hover: 0 20px 40px -10px rgba(79, 70, 229, 0.15), 0 0 0 1px rgba(79, 70, 229, 0.3);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .brand-gradient-text {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .brand-gradient-bg {
            background: var(--primary-gradient);
        }
        .custom-card {
            background: #FFFFFF;
            border-radius: 1.5rem;
            box-shadow: var(--card-shadow);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .custom-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }
        .nav-link {
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--primary-gradient);
            transition: width 0.25s ease;
            border-radius: 9999px;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }