/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-hover: #1d4ed8;
            --accent: #0284c7;
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
            --text-main: #0f172a;
            --text-muted: #64748b;
        }
        body {
            color: var(--text-main);
            background-color: #ffffff;
            font-family: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif;
            -webkit-font-smoothing: antialiased;
        }
        .hero-mask {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.82) 100%);
        }
        .soft-shadow {
            box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 6px -2px rgba(15, 23, 42, 0.02);
        }
        .hover-lift {
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .hover-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 35px -8px rgba(30, 64, 175, 0.12);
        }
        .custom-scrollbar::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        .custom-scrollbar::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 4px;
        }

/* roulang page: article */
:root {
            --primary: #1e40af;
            --primary-hover: #1d4ed8;
            --accent: #0284c7;
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
            --text-main: #0f172a;
            --text-muted: #64748b;
        }
        body {
            color: var(--text-main);
            background-color: #ffffff;
            font-family: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif;
            -webkit-font-smoothing: antialiased;
        }
        .soft-shadow {
            box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 6px -2px rgba(15, 23, 42, 0.02);
        }
        .article-content {
            font-size: 1.0625rem;
            line-height: 1.95;
            color: #334155;
        }
        .article-content p {
            margin-bottom: 1.75rem;
            text-align: justify;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #0f172a;
            margin-top: 2.5rem;
            margin-bottom: 1.25rem;
            padding-left: 0.875rem;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #1e293b;
            margin-top: 2rem;
            margin-bottom: 1rem;
            line-height: 1.4;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.75rem;
            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 {
            margin: 2rem 0;
            padding: 1.25rem 1.5rem;
            background-color: #f8fafc;
            border-left: 4px solid var(--accent);
            border-radius: 0 0.75rem 0.75rem 0;
            color: #475569;
            font-style: italic;
        }
        .article-content img {
            border-radius: 0.75rem;
            margin: 2rem auto;
            max-width: 100%;
            height: auto;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
        }

/* roulang page: category1 */
:root {
            --primary: #1e40af;
            --primary-hover: #1d4ed8;
            --accent: #0284c7;
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
            --text-main: #0f172a;
            --text-muted: #64748b;
        }
        body {
            color: var(--text-main);
            background-color: #ffffff;
            font-family: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif;
            -webkit-font-smoothing: antialiased;
        }
        .hero-mask {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.82) 100%);
        }
        .soft-shadow {
            box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 6px -2px rgba(15, 23, 42, 0.02);
        }
        .card-hover-up {
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover-up:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
        }
        .filter-btn.active {
            background-color: #1e40af;
            color: #ffffff;
            border-color: #1e40af;
        }