/* roulang page: index */
:root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --accent: #0e9f6e;
            --accent-light: #22c55e;
            --bg-body: #ffffff;
            --bg-section: #f8fafc;
            --bg-alt: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --radius-default: 0.75rem;
            --radius-lg: 1rem;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
            --shadow-elevated: 0 10px 40px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (min-width: 768px) {
            .container {
                padding: 0 2rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 2.5rem;
            }
        }
        .section-padding {
            padding: 5rem 0;
        }
        @media (max-width: 767px) {
            .section-padding {
                padding: 3rem 0;
            }
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-dark {
            background: var(--text-primary);
            color: #fff;
        }
        .heading-xl {
            font-size: 2.75rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }
        .heading-lg {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        .heading-md {
            font-size: 1.5rem;
            font-weight: 600;
            line-height: 1.4;
        }
        .heading-sm {
            font-size: 1.125rem;
            font-weight: 600;
            line-height: 1.5;
        }
        @media (max-width: 767px) {
            .heading-xl {
                font-size: 2rem;
            }
            .heading-lg {
                font-size: 1.75rem;
            }
            .heading-md {
                font-size: 1.25rem;
            }
        }
        .text-body {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .text-small {
            font-size: 0.875rem;
            color: var(--text-muted);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 9999px;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-align: center;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(26, 86, 219, 0.4);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
        }
        .btn-white:hover {
            background: #f1f5f9;
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
        }
        .btn-white:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 1rem 2.5rem;
            font-size: 1.125rem;
        }
        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.875rem;
        }
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-elevated);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }
        .card-body {
            padding: 1.5rem;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 9999px;
            background: var(--primary-50, #eff6ff);
            color: var(--primary);
            border: 1px solid var(--primary-200, #bfdbfe);
        }
        .badge-accent {
            background: #f0fdf4;
            color: var(--accent);
            border-color: #bbf7d0;
        }
        .badge-neutral {
            background: #f1f5f9;
            color: var(--text-secondary);
            border-color: #e2e8f0;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.2rem 0.6rem;
            font-size: 0.75rem;
            border-radius: 0.375rem;
            background: #f1f5f9;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        .tag:hover {
            background: var(--primary-100, #dbeafe);
            color: var(--primary);
        }
        .divider {
            height: 1px;
            background: var(--border-light);
            margin: 0;
            border: none;
        }
        /* Stats */
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.1;
            color: var(--primary);
        }
        .stat-label {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 0.25rem;
        }
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.25rem 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.0625rem;
            cursor: pointer;
            padding: 0.5rem 0;
            transition: var(--transition-base);
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .icon {
            transition: transform 0.3s ease;
            font-size: 1.25rem;
            flex-shrink: 0;
        }
        .faq-question.open .icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-bottom: 0.75rem;
        }
        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 68px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-start;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-center {
            flex-shrink: 0;
            padding: 0 1.5rem;
        }
        .nav-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: var(--transition-base);
        }
        .nav-logo:hover {
            color: var(--primary);
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.5rem 0.75rem;
            border-radius: 0.5rem;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 86, 219, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(26, 86, 219, 0.1);
            font-weight: 600;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem;
            border-radius: 0.375rem;
            transition: var(--transition-base);
        }
        .nav-toggle:hover {
            color: var(--primary);
            background: rgba(26, 86, 219, 0.06);
        }
        @media (max-width: 767px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-container {
                justify-content: space-between;
                height: 60px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-center {
                padding: 0;
            }
            .mobile-menu {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                border-bottom: 1px solid var(--border-light);
                padding: 1rem 1.5rem;
                display: none;
                flex-direction: column;
                gap: 0.5rem;
                z-index: 999;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            }
            .mobile-menu.open {
                display: flex;
            }
            .mobile-menu .nav-link {
                padding: 0.75rem 1rem;
                font-size: 1rem;
                border-radius: 0.5rem;
            }
            .mobile-menu .nav-link.active {
                background: rgba(26, 86, 219, 0.1);
            }
        }
        @media (min-width: 768px) {
            .mobile-menu {
                display: none !important;
            }
            .nav-toggle {
                display: none !important;
            }
        }
        /* Hero */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: 68px;
            overflow: hidden;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #1a56db 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(15, 23, 42, 0.3) 0%, rgba(15, 23, 42, 0.7) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            padding: 3rem 1.5rem;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            font-size: 0.875rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
        }
        .hero-title {
            font-size: 3.25rem;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 1.25rem;
        }
        .hero-title span {
            color: #60a5fa;
        }
        .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
            max-width: 640px;
            margin: 0 auto 2rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        @media (max-width: 767px) {
            .hero-section {
                min-height: 70vh;
            }
            .hero-title {
                font-size: 2.25rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
        }
        /* Grid & Cards */
        .grid-cols-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .grid-cols-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 1023px) {
            .grid-cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 767px) {
            .grid-cols-3,
            .grid-cols-2 {
                grid-template-columns: 1fr;
            }
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 1rem;
            background: var(--primary-50, #eff6ff);
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 1rem;
            transition: var(--transition-base);
        }
        .card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
        }
        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, #1a56db 0%, #1e40af 100%);
            color: #fff;
            text-align: center;
            padding: 5rem 0;
        }
        .cta-title {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .cta-sub {
            font-size: 1.125rem;
            opacity: 0.85;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        /* Footer */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 2rem;
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand span {
            color: #60a5fa;
        }
        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-heading {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-links a {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: #60a5fa;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.4);
        }
        @media (max-width: 767px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* CMS list */
        .cms-list-item {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition-base);
        }
        .cms-list-item:last-child {
            border-bottom: none;
        }
        .cms-list-item:hover {
            padding-left: 0.5rem;
        }
        .cms-list-item .cms-thumb {
            width: 100px;
            height: 72px;
            border-radius: 0.5rem;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-alt);
        }
        .cms-list-item .cms-info {
            flex: 1;
            min-width: 0;
        }
        .cms-list-item .cms-title {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 0.25rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .cms-list-item:hover .cms-title {
            color: var(--primary);
        }
        .cms-list-item .cms-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }
        .cms-list-item .cms-summary {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 0.25rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        @media (max-width: 767px) {
            .cms-list-item {
                flex-direction: column;
            }
            .cms-list-item .cms-thumb {
                width: 100%;
                height: 160px;
            }
        }
        /* Animations */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }
        /* Selection */
        ::selection {
            background: rgba(26, 86, 219, 0.2);
            color: var(--text-primary);
        }
        /* Skeleton loading for CMS */
        .cms-empty {
            text-align: center;
            padding: 2rem 1rem;
            color: var(--text-muted);
            font-size: 0.9375rem;
        }

/* roulang page: article */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --primary-muted: #b0c4de;
            --accent: #d4a843;
            --accent-light: #e8c56e;
            --accent-dark: #b8912e;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --text-dark: #1a1a2e;
            --text-muted: #6c757d;
            --text-light: #adb5bd;
            --border: #e9ecef;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
            --radius: 16px;
            --radius-sm: 8px;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        /* header */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky; top: 0; z-index: 100;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .nav-container {
            max-width: 1200px; margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between;
            height: 72px; position: relative;
        }
        .nav-left, .nav-right { display: flex; gap: 8px; flex: 1; }
        .nav-right { justify-content: flex-end; }
        .nav-center { position: absolute; left: 50%; transform: translateX(-50%); }
        .nav-logo {
            font-size: 1.5rem; font-weight: 700; letter-spacing: 1px;
            color: var(--primary); white-space: nowrap;
        }
        .nav-logo span { color: var(--accent); font-weight: 400; }
        .nav-link {
            padding: 8px 18px; border-radius: 40px; font-size: 0.95rem;
            font-weight: 500; color: var(--text-dark); transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover { background: rgba(30,58,95,0.06); color: var(--primary); }
        .nav-link.active { background: var(--primary); color: #fff; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 8px; }
        .mobile-menu {
            display: none; flex-direction: column; gap: 4px;
            padding: 16px 24px 24px; background: var(--bg-white);
            border-top: 1px solid var(--border);
        }
        .mobile-menu .nav-link { padding: 12px 16px; border-radius: var(--radius-sm); }
        .mobile-menu.show { display: flex; }
        /* footer */
        .site-footer {
            background: var(--primary-dark); color: #e0e7ef; padding: 60px 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px;
        }
        .footer-brand {
            font-size: 1.5rem; font-weight: 700; color: #fff; margin-bottom: 12px;
        }
        .footer-brand span { color: var(--accent); }
        .footer-desc { font-size: 0.95rem; line-height: 1.8; color: #b0c4de; max-width: 400px; }
        .footer-heading { font-size: 1.1rem; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: #b0c4de; font-size: 0.95rem; transition: var(--transition); }
        .footer-links a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0; margin-top: 48px;
            display: flex; justify-content: space-between; align-items: center;
            font-size: 0.85rem; color: #8899aa; flex-wrap: wrap; gap: 8px;
        }
        /* article specific */
        .article-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 80px 0 60px; position: relative; overflow: hidden;
        }
        .article-hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12; mix-blend-mode: overlay;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-meta {
            display: flex; flex-wrap: wrap; gap: 16px 32px;
            color: rgba(255,255,255,0.7); font-size: 0.9rem; margin-bottom: 20px;
        }
        .article-meta i { margin-right: 6px; }
        .article-category {
            display: inline-block; background: var(--accent); color: var(--primary-dark);
            padding: 4px 16px; border-radius: 40px; font-size: 0.8rem; font-weight: 600;
            letter-spacing: 0.5px;
        }
        .article-title {
            font-size: 2.6rem; font-weight: 700; color: #fff;
            line-height: 1.3; margin: 16px 0 12px; max-width: 900px;
        }
        .article-hero-desc {
            font-size: 1.15rem; color: rgba(255,255,255,0.8);
            max-width: 720px; line-height: 1.7;
        }
        .article-body-wrap {
            padding: 60px 0 80px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 48px 56px;
            max-width: 860px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.9;
            color: #2d3748;
        }
        .article-body h2 {
            font-size: 1.6rem; font-weight: 700; color: var(--primary);
            margin: 40px 0 16px; padding-bottom: 8px;
            border-bottom: 2px solid var(--accent);
        }
        .article-body h3 {
            font-size: 1.25rem; font-weight: 600; color: var(--primary-dark);
            margin: 28px 0 12px;
        }
        .article-body p { margin-bottom: 16px; }
        .article-body ul, .article-body ol { margin: 12px 0 20px 24px; }
        .article-body li { margin-bottom: 8px; list-style: disc; }
        .article-body img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow); }
        .article-body blockquote {
            border-left: 4px solid var(--accent); background: var(--bg-light);
            padding: 16px 24px; margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted); font-style: italic;
        }
        .article-body a { color: var(--primary-light); text-decoration: underline; }
        .article-body a:hover { color: var(--accent-dark); }
        .article-not-found {
            text-align: center; padding: 80px 24px;
        }
        .article-not-found i { font-size: 3rem; color: var(--text-light); margin-bottom: 16px; }
        .article-not-found h2 { font-size: 1.5rem; color: var(--text-dark); margin-bottom: 8px; }
        .article-not-found p { color: var(--text-muted); margin-bottom: 24px; }
        .article-not-found .btn-home {
            display: inline-block; background: var(--primary); color: #fff;
            padding: 12px 32px; border-radius: 40px; font-weight: 500;
            transition: var(--transition);
        }
        .article-not-found .btn-home:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
        /* related section */
        .related-section {
            background: var(--bg-white); padding: 60px 0; border-top: 1px solid var(--border);
        }
        .related-title {
            font-size: 1.5rem; font-weight: 700; color: var(--primary);
            text-align: center; margin-bottom: 40px;
        }
        .related-grid {
            display: grid; grid-template-columns: repeat(3,1fr); gap: 24px;
        }
        .related-card {
            background: var(--bg-light); border-radius: var(--radius);
            overflow: hidden; transition: var(--transition); border: 1px solid var(--border);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; }
        .related-card-body { padding: 20px; }
        .related-card-body h4 { font-size: 1.05rem; font-weight: 600; color: var(--text-dark); margin-bottom: 6px; }
        .related-card-body p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
        .related-card-body .read-more {
            display: inline-block; margin-top: 12px; color: var(--primary-light);
            font-weight: 500; font-size: 0.9rem;
        }
        .related-card-body .read-more:hover { color: var(--accent-dark); }
        /* share bar */
        .share-bar {
            display: flex; align-items: center; gap: 12px;
            padding: 24px 0 8px; border-top: 1px solid var(--border); margin-top: 40px;
        }
        .share-bar span { font-weight: 600; color: var(--text-dark); font-size: 0.95rem; }
        .share-btn {
            width: 40px; height: 40px; border-radius: 50%;
            display: inline-flex; align-items: center; justify-content: center;
            background: var(--bg-light); color: var(--text-muted);
            transition: var(--transition); font-size: 1rem;
        }
        .share-btn:hover { background: var(--primary); color: #fff; transform: scale(1.05); }
        /* responsive */
        @media (max-width: 1024px) {
            .article-title { font-size: 2.2rem; }
            .article-body { padding: 40px 36px; }
            .related-grid { grid-template-columns: repeat(2,1fr); }
        }
        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .nav-toggle { display: block; }
            .nav-center { position: static; transform: none; }
            .nav-container { justify-content: space-between; }
            .article-hero { padding: 60px 0 40px; }
            .article-title { font-size: 1.8rem; }
            .article-body { padding: 28px 20px; border-radius: var(--radius-sm); }
            .article-meta { flex-direction: column; gap: 8px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .related-grid { grid-template-columns: 1fr; }
            .article-hero-desc { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .article-title { font-size: 1.4rem; }
            .article-body { padding: 20px 16px; font-size: 0.95rem; }
            .container { padding: 0 16px; }
            .nav-container { padding: 0 16px; }
        }

/* roulang page: category1 */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --secondary: #e8b849;
            --secondary-light: #f0d06a;
            --accent: #d4823c;
            --bg-light: #f8f9fc;
            --bg-dark: #0d1b2a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --border: #e2e6f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--bg-light);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }

        button,
        input {
            font-family: inherit;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }

        .site-header:hover {
            background: rgba(255, 255, 255, 0.98);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }

        .nav-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo span {
            color: var(--secondary);
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }

        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.25);
        }

        .nav-link.active:hover {
            background: var(--primary-light);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(30, 58, 95, 0.08);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 8px;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
        }

        .mobile-menu .nav-link {
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            font-size: 1.05rem;
        }

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

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-center {
                position: static;
                transform: none;
                flex: 1;
                text-align: center;
            }
            .nav-container {
                justify-content: space-between;
            }
        }

        @media (max-width: 480px) {
            .nav-logo {
                font-size: 1.25rem;
            }
        }

        .page-banner {
            padding: 120px 0 80px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.20);
        }

        .page-banner p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 720px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.70);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.80);
        }

        .breadcrumb a:hover {
            color: var(--secondary);
        }

        .breadcrumb span {
            color: var(--secondary);
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 100px 0 60px;
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }

        @media (max-width: 480px) {
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
        }

        .section {
            padding: 80px 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin-bottom: 16px;
            line-height: 1.25;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }

        .card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 32px 24px;
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.6rem;
            margin-bottom: 18px;
        }

        .card h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }

        .step-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }

        .step-card::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -16px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(232, 184, 73, 0.35);
        }

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

        .step-card h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--primary);
            margin: 12px 0 10px;
        }

        .step-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 24px;
        }

        .scenario-item {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 22px;
            border-left: 4px solid var(--secondary);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .scenario-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }

        .scenario-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .scenario-item p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary-light);
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }

        .faq-question:hover {
            background: rgba(30, 58, 95, 0.03);
        }

        .faq-question i {
            font-size: 0.9rem;
            color: var(--text-light);
            transition: var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-answer.open {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--secondary);
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(232, 184, 73, 0.35);
        }

        .cta-btn:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(232, 184, 73, 0.45);
        }

        .cta-btn i {
            font-size: 1rem;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .cta-btn {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand span {
            color: var(--secondary);
        }

        .footer-desc {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-heading {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .footer-links li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-desc {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(232, 184, 73, 0.15);
            color: var(--accent);
            border: 1px solid rgba(232, 184, 73, 0.25);
        }

        .badge-primary {
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
            border-color: rgba(30, 58, 95, 0.15);
        }

        .text-highlight {
            color: var(--secondary);
        }

        .img-cover-card {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 18px;
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeIn 0.6s ease forwards;
        }

        @keyframes fadeIn {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }