/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #10b981;
            --bg: #f6f8fc;
            --bg-white: #ffffff;
            --text: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 2px 8px rgba(30, 64, 175, 0.06);
            --shadow: 0 8px 30px rgba(30, 64, 175, 0.08);
            --shadow-lg: 0 20px 60px rgba(30, 64, 175, 0.12);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all .3s ease;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            padding: 0.875rem 2rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.9375rem;
            box-shadow: 0 4px 15px rgba(30, 64, 175, 0.3);
            transition: all .3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            border: 1px solid var(--border);
            color: var(--text);
            background: var(--bg-white);
            padding: 0.75rem 1.75rem;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 0.9375rem;
            transition: all .3s ease;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 4px 15px rgba(30, 64, 175, 0.1);
            transform: translateY(-2px);
        }
        .nav-link {
            position: relative;
            padding: 0.5rem 0.25rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: color .3s;
            letter-spacing: 0.02em;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }
        .card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.75rem;
            box-shadow: var(--shadow);
            transition: all .35s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(30, 64, 175, 0.2);
        }
        .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1.25rem;
            transition: all .3s ease;
        }
        .card:hover .icon-wrap {
            transform: scale(1.08);
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: box-shadow .3s, border-color .3s;
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
            border-color: rgba(30, 64, 175, 0.15);
        }
        .faq-item summary {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            font-size: 1rem;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            font-weight: 300;
            transition: transform .3s;
            flex-shrink: 0;
            margin-left: 1rem;
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item .faq-body {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.8;
        }
        .footer-link {
            color: #94a3b8;
            transition: color .3s;
            font-size: 0.875rem;
        }
        .footer-link:hover {
            color: #fff;
        }
        @media (max-width: 640px) {
            .btn-primary,
            .btn-outline {
                padding: 0.75rem 1.5rem;
                font-size: 0.875rem;
            }
            .card {
                padding: 1.25rem;
            }
            .faq-item summary {
                padding: 1rem;
                font-size: 0.9375rem;
            }
            .faq-item .faq-body {
                padding: 0 1rem 1rem;
            }
        }

/* roulang page: article */
:root {
            --primary-50: #eef2ff;
            --primary-100: #e0e7ff;
            --primary-500: #6366f1;
            --primary-600: #4f46e5;
            --primary-700: #4338ca;
            --text-main: #1e293b;
            --text-soft: #64748b;
            --border-light: #e2e8f0;
            --bg-soft: #f8fafc;
            --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
            --radius-lg: 16px;
            --radius-md: 12px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, 'Segoe UI', sans-serif;
            color: var(--text-main);
            background: #ffffff;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (max-width: 640px) {
            .container-custom {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        .nav-link {
            position: relative;
            font-weight: 500;
            color: #334155;
            padding: 0.5rem 0;
            transition: color 0.25s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary-500), var(--primary-700));
            transition: width 0.3s ease;
        }

        .nav-link:hover {
            color: var(--primary-700);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary-700);
            font-weight: 600;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
            transition: all 0.3s ease;
            gap: 0.5rem;
            border: none;
            cursor: pointer;
            font-size: 0.9375rem;
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.35);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            color: var(--primary-700);
            border: 1.5px solid rgba(79, 70, 229, 0.25);
            background: rgba(79, 70, 229, 0.04);
            transition: all 0.3s ease;
            gap: 0.5rem;
            font-size: 0.9375rem;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-outline:hover {
            background: rgba(79, 70, 229, 0.08);
            border-color: rgba(79, 70, 229, 0.45);
            transform: translateY(-1px);
        }

        .btn-outline:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.3);
            outline-offset: 2px;
        }

        .footer-link {
            color: #94a3b8;
            transition: color 0.25s ease;
            font-size: 0.9375rem;
        }

        .footer-link:hover {
            color: #fff;
        }

        .cms-content {
            font-size: 1.0625rem;
            line-height: 1.9;
            color: #334155;
            overflow-wrap: break-word;
            word-break: break-word;
        }

        .cms-content>*:first-child {
            margin-top: 0;
        }

        .cms-content h2 {
            font-size: 1.45rem;
            font-weight: 700;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: #0f172a;
            line-height: 1.45;
        }

        .cms-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
            color: #0f172a;
        }

        .cms-content h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-top: 1.75rem;
            margin-bottom: 0.5rem;
            color: #0f172a;
        }

        .cms-content p {
            margin-bottom: 1.25rem;
        }

        .cms-content ul,
        .cms-content ol {
            padding-left: 1.5rem;
            margin-bottom: 1.25rem;
        }

        .cms-content ul {
            list-style: disc;
        }

        .cms-content ol {
            list-style: decimal;
        }

        .cms-content li {
            margin-bottom: 0.5rem;
        }

        .cms-content img {
            border-radius: var(--radius-lg);
            margin: 1.75rem 0;
            box-shadow: var(--shadow-card);
            height: auto;
        }

        .cms-content blockquote {
            border-left: 4px solid var(--primary-500);
            padding: 1rem 1.25rem;
            color: #475569;
            font-style: italic;
            margin: 1.75rem 0;
            background: var(--bg-soft);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }

        .cms-content a {
            color: var(--primary-600);
            border-bottom: 1px solid rgba(79, 70, 229, 0.3);
            transition: border-color 0.2s;
        }

        .cms-content a:hover {
            border-bottom-color: var(--primary-600);
        }

        .cms-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.75rem 0;
            font-size: 0.95rem;
        }

        .cms-content th,
        .cms-content td {
            border: 1px solid var(--border-light);
            padding: 0.75rem 1rem;
            text-align: left;
        }

        .cms-content th {
            background: var(--bg-soft);
            font-weight: 600;
            color: #0f172a;
        }

        .cms-content code {
            background: #f1f5f9;
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-size: 0.9em;
            color: #be185d;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            font-size: 0.8125rem;
            font-weight: 500;
            background: var(--bg-soft);
            color: #475569;
            border: 1px solid var(--border-light);
            transition: all 0.25s ease;
        }

        .tag-pill:hover {
            background: var(--primary-50);
            border-color: var(--primary-500);
            color: var(--primary-700);
        }

        .hero-back {
            position: relative;
            background-image: linear-gradient(rgba(15, 23, 42, 0.78), rgba(15, 23, 42, 0.62)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }

        .cta-back {
            position: relative;
            background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.78)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
        }

        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .mobile-menu {
            display: none;
        }

        .mobile-menu.open {
            display: block;
        }

        @media (min-width: 1024px) {
            .mobile-menu-btn {
                display: none;
            }
        }

        .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            margin: 0 0.5rem;
            color: #94a3b8;
            font-size: 0.875rem;
        }

/* roulang page: category1 */
:root {
            --primary-50: #eff6ff;
            --primary-100: #dbeafe;
            --primary-200: #bfdbfe;
            --primary-300: #93c5fd;
            --primary-400: #60a5fa;
            --primary-500: #3b82f6;
            --primary-600: #2563eb;
            --primary-700: #1d4ed8;
            --primary-800: #1e40af;
            --primary-900: #1e3a8a;
            --accent-400: #fbbf24;
            --accent-500: #f59e0b;
            --bg: #f8fafc;
            --surface: #ffffff;
            --border: #e2e8f0;
            --text: #0f172a;
            --muted: #64748b;
            --radius: 1rem;
            --radius-lg: 1.25rem;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
            --shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--bg);
            color: var(--text);
            font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        * {
            box-sizing: border-box;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        summary {
            font: inherit;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        .container-custom {
            width: 100%;
            max-width: 1200px;
            margin-inline: auto;
            padding-inline: 1.25rem;
        }

        section {
            scroll-margin-top: 5.5rem;
        }

        @media (min-width: 640px) {
            .container-custom {
                padding-inline: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding-inline: 2rem;
            }
        }

        .section-pad {
            padding-top: 4.5rem;
            padding-bottom: 4.5rem;
        }

        @media (min-width: 768px) {
            .section-pad {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }

        .nav-link {
            position: relative;
            padding: 0.5rem 0.75rem;
            font-weight: 500;
            font-size: 0.95rem;
            color: #475569;
            border-bottom: 2px solid transparent;
            transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
        }

        .nav-link:hover {
            color: var(--primary-700);
        }

        .nav-link.active {
            color: var(--primary-700);
            border-bottom-color: var(--primary-600);
            font-weight: 600;
        }

        @media (max-width: 1023px) {
            .nav-link {
                border-bottom: none;
                border-radius: 0.75rem;
                margin-bottom: 0.25rem;
            }

            .nav-link.active {
                background: var(--primary-50);
                color: var(--primary-700);
            }
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--primary-700), var(--primary-500));
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.7rem 1.4rem;
            border-radius: 0.75rem;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.25);
            transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(37, 99, 235, 0.3);
            filter: brightness(1.05);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border: 1px solid rgba(255, 255, 255, 0.55);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 0.7rem 1.4rem;
            border-radius: 0.75rem;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
        }

        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: #ffffff;
            color: var(--primary-700);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 0.75rem 1.5rem;
            border-radius: 0.75rem;
            box-shadow: 0 8px 20px rgba(255, 255, 255, 0.15);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 255, 255, 0.22);
        }

        .card-hover {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .card-hover:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-200);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            background: var(--primary-50);
            color: var(--primary-700);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            background: rgba(255, 255, 255, 0.15);
            color: #f1f5f9;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(6px);
            font-size: 0.8rem;
            font-weight: 500;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
        }

        .list-check {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }

        .list-check li {
            position: relative;
            padding-left: 1.9rem;
            color: #334155;
            font-size: 0.975rem;
        }

        .list-check li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 0.1rem;
            width: 1.45rem;
            height: 1.45rem;
            border-radius: 999px;
            background: var(--primary-50);
            color: var(--primary-700);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
        }

        .footer-link {
            color: #94a3b8;
            font-size: 0.9rem;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-link:hover {
            color: #ffffff;
            padding-left: 0.25rem;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.25rem 1.5rem;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .faq-item[open] {
            border-color: var(--primary-200);
            box-shadow: var(--shadow);
        }

        .faq-item summary {
            cursor: pointer;
            list-style: none;
            font-weight: 600;
            font-size: 1rem;
            color: #1e293b;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--primary-600);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            margin-top: 0.85rem;
            color: #475569;
            font-size: 0.95rem;
            line-height: 1.75;
            border-top: 1px dashed #e2e8f0;
            padding-top: 0.85rem;
        }

        .step-card {
            position: relative;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 1.75rem;
            backdrop-filter: blur(6px);
            transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
        }

        .step-card:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(96, 165, 250, 0.4);
            transform: translateY(-4px);
        }

        .step-number {
            width: 2.75rem;
            height: 2.75rem;
            border-radius: 999px;
            background: linear-gradient(135deg, #60a5fa, #2563eb);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.05rem;
            color: #fff;
            box-shadow: 0 8px 18px rgba(37, 99, 235, 0.35);
            margin-bottom: 1.1rem;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
            border-radius: 0.5rem;
        }

        .img-zoom {
            overflow: hidden;
        }

        .img-zoom img {
            transition: transform 0.5s ease;
        }

        .img-zoom:hover img {
            transform: scale(1.05);
        }