/* roulang page: index */
:root {
            --primary: #1E40AF;
            --secondary: #3B82F6;
            --accent: #F97316;
            --bg-canvas: #F8FAFC;
            --surface: #FFFFFF;
            --text-main: #0F172A;
            --text-sub: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        /* 斜切色块 Hero 造型 */
        .hero-slant-bg {
            background: linear-gradient(135deg, #1E40AF 0%, #1D4ED8 50%, #2563EB 100%);
            clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
        }
        @media (max-width: 768px) {
            .hero-slant-bg {
                clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
            }
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: 1rem;
            box-shadow: 0 4px 20px -2px rgba(30, 64, 175, 0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px -4px rgba(30, 64, 175, 0.14);
            border-color: #BFDBFE;
        }

/* roulang page: category1 */
:root {
            --primary: #1E40AF;
            --secondary: #3B82F6;
            --accent: #F97316;
            --bg-canvas: #F8FAFC;
            --surface: #FFFFFF;
            --text-main: #0F172A;
            --text-sub: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: 1rem;
            box-shadow: 0 4px 20px -2px rgba(30, 64, 175, 0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px -4px rgba(30, 64, 175, 0.14);
            border-color: #BFDBFE;
        }
        .coupon-cutout {
            position: relative;
            background: radial-gradient(circle at 0 50%, transparent 12px, #ffffff 13px) top left,
                        radial-gradient(circle at 100% 50%, transparent 12px, #ffffff 13px) top right;
            background-size: 100% 100%;
            background-repeat: no-repeat;
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            transition: all 0.2s;
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        .accordion-item.active .accordion-content {
            max-height: 240px;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }

/* roulang page: article */
:root {
            --primary: #1E40AF;
            --secondary: #3B82F6;
            --accent: #F97316;
            --bg-canvas: #F8FAFC;
            --surface: #FFFFFF;
            --text-main: #0F172A;
            --text-sub: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: 1rem;
            box-shadow: 0 4px 20px -2px rgba(30, 64, 175, 0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px -4px rgba(30, 64, 175, 0.14);
            border-color: #BFDBFE;
        }
        .article-content-body {
            line-height: 1.85;
            font-size: 1.05rem;
            color: #334155;
        }
        .article-content-body p {
            margin-bottom: 1.5rem;
            letter-spacing: 0.01em;
        }
        .article-content-body h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #0F172A;
            margin-top: 2.5rem;
            margin-bottom: 1.25rem;
            padding-left: 0.75rem;
            border-left: 4px solid #1E40AF;
        }
        .article-content-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: #1E293B;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .article-content-body blockquote {
            background: #EFF6FF;
            border-left: 4px solid #3B82F6;
            padding: 1.25rem 1.5rem;
            margin: 1.75rem 0;
            border-radius: 0 0.75rem 0.75rem 0;
            color: #1E3A8A;
            font-weight: 500;
        }
        .article-content-body ul, .article-content-body ol {
            margin-bottom: 1.5rem;
            padding-left: 1.5rem;
        }
        .article-content-body li {
            margin-bottom: 0.5rem;
            list-style-type: disc;
        }
        .article-content-body img {
            max-width: 100%;
            height: auto;
            border-radius: 0.75rem;
            margin: 2rem auto;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
        }
        .pull-quote-box {
            position: relative;
            background: linear-gradient(135deg, #1E40AF 0%, #2563EB 100%);
            color: #FFFFFF;
            padding: 2.25rem 2rem;
            border-radius: 1rem;
            box-shadow: 0 12px 30px -5px rgba(30, 64, 175, 0.25);
            margin: 2.5rem 0;
        }
        .pull-quote-box::before {
            content: "“";
            position: absolute;
            top: -10px;
            left: 20px;
            font-size: 5rem;
            color: rgba(255, 255, 255, 0.15);
            font-family: Georgia, serif;
            line-height: 1;
        }

/* roulang page: category2 */
:root {
            --primary: #1E40AF;
            --secondary: #3B82F6;
            --accent: #F97316;
            --bg-canvas: #F8FAFC;
            --surface: #FFFFFF;
            --text-main: #0F172A;
            --text-sub: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .card-custom {
            background: #FFFFFF;
            border: 1px solid var(--border-line);
            border-radius: 1rem;
            box-shadow: 0 4px 20px -2px rgba(30, 64, 175, 0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px -4px rgba(30, 64, 175, 0.14);
            border-color: #BFDBFE;
        }
        .timeline-line::before {
            content: '';
            position: absolute;
            top: 2rem;
            bottom: 2rem;
            left: 1.5rem;
            width: 2px;
            background: #E2E8F0;
            z-index: 0;
        }
        @media (max-width: 640px) {
            .timeline-line::before {
                left: 1rem;
            }
        }