/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0f1b3d;
            --color-primary-light: #1a2d5e;
            --color-accent: #d4a853;
            --color-accent-light: #e8c97a;
            --color-accent-dark: #b8912e;
            --color-bg: #ffffff;
            --color-bg-alt: #f7f8fc;
            --color-bg-dark: #0a122e;
            --color-text: #1a1a2e;
            --color-text-light: #5a6270;
            --color-text-inverse: #ffffff;
            --color-border: #e6e9f0;
            --color-border-light: #f0f2f8;
            --color-success: #2d8a4e;
            --color-error: #c0392b;
            --color-warning: #e67e22;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 4px rgba(15, 27, 61, 0.06);
            --shadow-md: 0 4px 20px rgba(15, 27, 61, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 27, 61, 0.12);
            --shadow-xl: 0 24px 60px rgba(15, 27, 61, 0.16);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --font-serif: 'Georgia', 'Times New Roman', serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --spacing-xl: 4rem;
            --spacing-2xl: 6rem;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
        }

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

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

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-text);
        }

        h1 {
            font-size: 2.75rem;
        }
        h2 {
            font-size: 2.25rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.25rem;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }

        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        .section-title h2 {
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }

        .section-title p {
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        .text-accent {
            color: var(--color-accent);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
        }

        .btn-primary:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-text-inverse);
            border-color: rgba(255, 255, 255, 0.35);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-dark {
            background: var(--color-primary);
            color: var(--color-text-inverse);
            border-color: var(--color-primary);
        }

        .btn-dark:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: 1rem 2.25rem;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }

        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.85rem;
        }

        .btn:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--color-accent);
            color: var(--color-primary);
            letter-spacing: 0.02em;
        }

        .badge-light {
            background: rgba(212, 168, 83, 0.15);
            color: var(--color-accent-dark);
        }

        .badge-dark {
            background: rgba(255, 255, 255, 0.12);
            color: var(--color-text-inverse);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(15, 27, 61, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text-inverse);
            letter-spacing: -0.01em;
        }

        .site-logo i {
            color: var(--color-accent);
            font-size: 1.5rem;
        }

        .site-logo span {
            background: linear-gradient(135deg, #ffffff 40%, var(--color-accent-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            font-size: 0.92rem;
            padding: 0.25rem 0;
            position: relative;
            transition: color var(--transition);
            letter-spacing: 0.01em;
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--color-accent);
            transform: scaleX(0);
            transition: transform var(--transition);
            border-radius: 2px;
        }

        .main-nav a:hover {
            color: var(--color-text-inverse);
        }

        .main-nav a:hover::after {
            transform: scaleX(0.6);
        }

        .main-nav a.active {
            color: var(--color-text-inverse);
        }

        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            margin-left: 0.5rem;
        }

        .nav-cta .btn {
            padding: 0.5rem 1.25rem;
            font-size: 0.85rem;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--color-text-inverse);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            background: var(--color-primary);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center/cover no-repeat;
            opacity: 0.3;
            mix-blend-mode: overlay;
        }

        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(15, 27, 61, 0.4) 0%, rgba(15, 27, 61, 0.92) 70%);
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
            padding-top: var(--spacing-xl);
            padding-bottom: var(--spacing-xl);
        }

        .hero-content h1 {
            color: var(--color-text-inverse);
            font-size: 3.25rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: var(--spacing-md);
        }

        .hero-content h1 .highlight {
            background: linear-gradient(135deg, var(--color-accent), #f0d68a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.15rem;
            line-height: 1.7;
            max-width: 520px;
            margin-bottom: var(--spacing-lg);
        }

        .hero-actions {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat .number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent);
            display: block;
            line-height: 1.2;
        }

        .hero-stat .label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            margin-top: 0.25rem;
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-xl);
            max-height: 480px;
            object-fit: cover;
            width: 100%;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }

        .feature-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
        }

        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(212, 168, 83, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
            font-size: 1.5rem;
            color: var(--color-accent);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-sm);
        }

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

        /* ===== Services / Category Cards ===== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }

        .service-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            position: relative;
        }

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

        .service-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .service-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .service-card .card-img .badge {
            position: absolute;
            top: var(--spacing-md);
            left: var(--spacing-md);
        }

        .service-card .card-body {
            padding: var(--spacing-lg);
        }

        .service-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: var(--spacing-sm);
        }

        .service-card .card-body p {
            color: var(--color-text-light);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: var(--spacing-md);
        }

        .service-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 var(--spacing-lg) var(--spacing-lg);
        }

        .service-card .card-footer .btn {
            padding: 0.5rem 1.25rem;
            font-size: 0.85rem;
        }

        .tag-group {
            display: flex;
            gap: 0.4rem;
            flex-wrap: wrap;
        }

        .tag {
            padding: 0.15rem 0.6rem;
            font-size: 0.75rem;
            border-radius: 50px;
            background: var(--color-bg-alt);
            color: var(--color-text-light);
            border: 1px solid var(--color-border);
        }

        /* ===== Latest News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }

        .news-card {
            display: flex;
            gap: var(--spacing-md);
            padding: var(--spacing-md);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            background: var(--color-bg);
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
            transform: translateX(4px);
        }

        .news-card .thumb {
            width: 120px;
            min-height: 90px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }

        .news-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-card .info {
            flex: 1;
            min-width: 0;
        }

        .news-card .info .meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--color-text-light);
            margin-bottom: 0.35rem;
        }

        .news-card .info .meta .cat {
            color: var(--color-accent);
            font-weight: 600;
        }

        .news-card .info h4 {
            font-size: 1rem;
            line-height: 1.4;
            margin-bottom: 0.3rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .info h4 a {
            color: var(--color-text);
        }

        .news-card .info h4 a:hover {
            color: var(--color-accent-dark);
        }

        .news-card .info .excerpt {
            font-size: 0.88rem;
            color: var(--color-text-light);
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--spacing-xl);
            color: var(--color-text-light);
            background: var(--color-bg-alt);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }

        /* ===== Stats / Data Block ===== */
        .stats-block {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl) var(--spacing-lg);
            position: relative;
            overflow: hidden;
        }

        .stats-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .stats-grid {
            position: relative;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            text-align: center;
        }

        .stats-grid .stat-item .number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-accent);
            display: block;
            line-height: 1.2;
        }

        .stats-grid .stat-item .label {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.95rem;
            margin-top: 0.3rem;
        }

        .stats-grid .stat-item .desc {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.8rem;
            margin-top: 0.15rem;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            position: relative;
        }

        .process-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-accent), var(--color-border), var(--color-accent));
            opacity: 0.3;
        }

        .process-step {
            text-align: center;
            position: relative;
        }

        .process-step .step-num {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            border: 2px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-accent);
            transition: all var(--transition);
        }

        .process-step:hover .step-num {
            background: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
            box-shadow: 0 0 0 8px rgba(212, 168, 83, 0.12);
        }

        .process-step h4 {
            font-size: 1.05rem;
            margin-bottom: 0.25rem;
        }

        .process-step p {
            color: var(--color-text-light);
            font-size: 0.88rem;
            max-width: 200px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-item summary {
            padding: var(--spacing-md) var(--spacing-lg);
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            color: var(--color-text);
            user-select: none;
        }

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

        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--color-accent);
            transition: transform var(--transition);
        }

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

        .faq-item .answer {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            color: var(--color-text-light);
            line-height: 1.7;
            font-size: 0.95rem;
            border-top: 1px solid var(--color-border-light);
            padding-top: var(--spacing-md);
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: var(--spacing-xl) var(--spacing-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center/cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }

        .cta-block .container {
            position: relative;
        }

        .cta-block h2 {
            color: var(--color-text-inverse);
            font-size: 2rem;
            margin-bottom: var(--spacing-sm);
        }

        .cta-block p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto var(--spacing-lg);
        }

        .cta-block .btn {
            font-size: 1.05rem;
            padding: 1rem 2.5rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.6);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }

        .footer-brand .site-logo {
            margin-bottom: var(--spacing-md);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            color: var(--color-text-inverse);
            font-size: 1rem;
            margin-bottom: var(--spacing-md);
            font-weight: 600;
        }

        .footer-col ul li {
            margin-bottom: 0.5rem;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--color-accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            font-size: 0.85rem;
        }

        .footer-bottom a {
            color: var(--color-accent);
        }

        .footer-bottom a:hover {
            text-decoration: underline;
        }

        .footer-social {
            display: flex;
            gap: var(--spacing-md);
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.5);
            transition: all var(--transition);
            font-size: 1rem;
        }

        .footer-social a:hover {
            background: var(--color-accent);
            color: var(--color-primary);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }

            .hero-content h1 {
                font-size: 2.5rem;
            }

            .hero-stats {
                max-width: 480px;
            }

            .hero-visual {
                display: none;
            }

            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-lg);
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-grid::before {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }

            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --spacing-2xl: 3rem;
                --spacing-xl: 2rem;
            }

            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.65rem;
            }
            h3 {
                font-size: 1.25rem;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15, 27, 61, 0.98);
                flex-direction: column;
                padding: var(--spacing-lg);
                gap: var(--spacing-md);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a {
                font-size: 1rem;
                padding: 0.5rem 0;
            }

            .nav-cta {
                margin-left: 0;
                width: 100%;
            }

            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }

            .nav-toggle {
                display: flex;
            }

            .hero {
                min-height: 70vh;
            }

            .hero-content h1 {
                font-size: 2rem;
            }

            .hero-content p {
                font-size: 1rem;
            }

            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                padding: var(--spacing-md);
            }

            .hero-stat .number {
                font-size: 1.5rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .services-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }

            .stats-grid .stat-item .number {
                font-size: 1.8rem;
            }

            .process-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
                max-width: 320px;
                margin: 0 auto;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .news-card {
                flex-direction: column;
            }

            .news-card .thumb {
                width: 100%;
                height: 140px;
            }

            .section {
                padding: var(--spacing-xl) 0;
            }

            .cta-block h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--spacing-md);
            }

            .hero-content h1 {
                font-size: 1.65rem;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .hero-stats {
                grid-template-columns: 1fr 1fr 1fr;
                padding: var(--spacing-sm);
                gap: var(--spacing-sm);
            }

            .hero-stat .number {
                font-size: 1.2rem;
            }

            .hero-stat .label {
                font-size: 0.7rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }

            .stats-grid .stat-item .number {
                font-size: 1.5rem;
            }

            .section-title h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
        }

        :focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-lg {
            margin-top: var(--spacing-lg);
        }
        .mb-lg {
            margin-bottom: var(--spacing-lg);
        }
        .gap-sm {
            gap: var(--spacing-sm);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a47;
            --secondary: #e94560;
            --secondary-light: #f05a74;
            --accent: #f5a623;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0b1120;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-light: #f0f0f5;
            --border: #e2e6f0;
            --border-light: #f0f2f8;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.10);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: all 0.25s ease;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.85;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .main-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--secondary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            width: 100%;
        }

        .nav-cta {
            margin-left: 8px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.2;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(233, 69, 96, 0.35);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(233, 69, 96, 0.2);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 42, 108, 0.2);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 120px 0 80px;
            margin-top: var(--header-height);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            color: var(--text-light);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 700px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.15);
            margin-bottom: 24px;
        }
        .page-hero .hero-badge i {
            color: var(--accent);
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: #fff;
        }
        .section-dark .text-muted {
            color: rgba(255, 255, 255, 0.5);
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .section-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(233, 69, 96, 0.08);
            color: var(--secondary);
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .section-header .section-tag {
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent);
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid.col-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid.col-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            border-radius: 0;
        }
        .card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .card .card-body .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(26, 42, 108, 0.06);
            color: var(--primary-light);
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .card .card-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .card .card-footer a {
            color: var(--secondary);
            font-weight: 500;
        }
        .card .card-footer a:hover {
            text-decoration: underline;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(26, 42, 108, 0.06);
            color: var(--primary-light);
        }
        .badge-hot {
            background: rgba(233, 69, 96, 0.1);
            color: var(--secondary);
        }
        .badge-new {
            background: rgba(245, 166, 35, 0.12);
            color: #c47d10;
        }
        .badge i {
            font-size: 0.7rem;
        }

        /* ===== Stats / Data Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-item[open] summary {
            border-bottom: 1px solid var(--border-light);
        }
        .faq-item .faq-answer {
            padding: 16px 24px 24px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .faq-item summary {
            color: #fff;
        }
        .section-dark .faq-item .faq-answer {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .faq-item[open] summary {
            border-color: rgba(255, 255, 255, 0.08);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .site-logo span {
            background: linear-gradient(135deg, #fff, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .site-footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .site-footer .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 4px;
        }
        .site-footer .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .site-footer .footer-social a:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Content List ===== */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .content-item {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            align-items: flex-start;
        }
        .content-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .content-item .item-img {
            width: 200px;
            min-height: 120px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .content-item .item-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .content-item .item-body h3 a {
            color: var(--text-primary);
        }
        .content-item .item-body h3 a:hover {
            color: var(--secondary);
        }
        .content-item .item-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
        }
        .content-item .item-body .item-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .content-item .item-body .item-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .content-item .item-body .item-meta i {
            font-size: 0.75rem;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid.col-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .page-hero h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 24px 28px;
                gap: 20px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                align-items: flex-start;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .main-nav a {
                font-size: 1.05rem;
            }
            .main-nav .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }
            .main-nav .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 100px 0 60px;
                min-height: 280px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-header {
                margin-bottom: 36px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid.col-2,
            .card-grid.col-4 {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item {
                padding: 24px 12px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }

            .content-item {
                flex-direction: column;
            }
            .content-item .item-img {
                width: 100%;
                min-height: 180px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .cta-section .btn {
                width: 100%;
                justify-content: center;
            }

            .faq-item summary {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 12px 18px 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .page-hero p {
                font-size: 0.92rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 1.7rem;
            }
            .card .card-body {
                padding: 18px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .d-none {
            display: none;
        }

        /* ===== Section Divider ===== */
        .section-divider {
            width: 60px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 0 auto 20px;
        }
        .section-dark .section-divider {
            background: var(--accent);
        }

        /* ===== Features Strip ===== */
        .features-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding: 0;
        }
        .feature-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-item .feature-icon {
            font-size: 2.2rem;
            color: var(--secondary);
            margin-bottom: 16px;
        }
        .feature-item h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .feature-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        @media (max-width: 1024px) {
            .features-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .features-strip {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1a2e;
            --primary-light: #132a44;
            --accent: #d4a843;
            --accent-hover: #c49a35;
            --accent-light: rgba(212, 168, 67, 0.12);
            --bg-body: #f5f6f8;
            --bg-card: #ffffff;
            --bg-dark: #0b1a2e;
            --bg-section-alt: #f0f2f5;
            --text-primary: #1a2332;
            --text-secondary: #4a5568;
            --text-muted: #8896a8;
            --text-light: #ffffff;
            --border-color: #e2e8f0;
            --border-light: rgba(255, 255, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(11, 26, 46, 0.06);
            --shadow-md: 0 8px 30px rgba(11, 26, 46, 0.08);
            --shadow-lg: 0 20px 60px rgba(11, 26, 46, 0.12);
            --shadow-accent: 0 4px 20px rgba(212, 168, 67, 0.3);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 头部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(11, 26, 46, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: 0.5px;
        }
        .site-logo i {
            font-size: 1.5rem;
            color: var(--accent);
        }
        .site-logo span {
            background: linear-gradient(135deg, #fff 60%, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .main-nav a {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .main-nav a:hover {
            color: #fff;
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            width: 100%;
        }
        .nav-cta {
            margin-left: 8px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            gap: 5px;
            padding: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 820px) {
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(11, 26, 46, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px 32px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.4s ease, opacity 0.4s ease;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                align-items: stretch;
                pointer-events: none;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                padding: 14px 16px;
                font-size: 1.05rem;
                border-radius: 8px;
                color: rgba(255, 255, 255, 0.8);
            }
            .main-nav a::after {
                display: none;
            }
            .main-nav a:hover {
                background: rgba(255, 255, 255, 0.06);
                color: #fff;
            }
            .main-nav a.active {
                background: var(--accent-light);
                color: var(--accent);
            }
            .nav-cta {
                margin: 12px 0 0;
                text-align: center;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-light);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(212, 168, 67, 0.08);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
        }

        /* ===== 文章详情页 ===== */
        .article-page {
            padding-top: var(--header-height);
        }

        /* --- 文章 Hero --- */
        .article-hero {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 24px 60px;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.88) 0%, rgba(11, 26, 46, 0.72) 100%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .article-hero .article-category {
            display: inline-block;
            padding: 4px 18px;
            background: var(--accent);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-light);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-hero .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-hero .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .article-meta i {
            color: var(--accent);
            font-size: 0.85rem;
        }

        @media (max-width: 768px) {
            .article-hero {
                min-height: 240px;
                padding: 60px 16px 40px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .article-meta {
                gap: 12px;
                font-size: 0.8rem;
                flex-direction: column;
            }
        }
        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
        }

        /* --- 面包屑 --- */
        .breadcrumb-section {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
        }
        .breadcrumb-section .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb-section a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb-section a:hover {
            color: var(--accent);
        }
        .breadcrumb-section .sep {
            color: var(--border-color);
            font-size: 0.7rem;
        }
        .breadcrumb-section .current {
            color: var(--text-primary);
            font-weight: 500;
            max-width: 300px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* --- 文章正文 --- */
        .article-main {
            padding: 48px 0 60px;
        }
        .article-main .container {
            max-width: 800px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 48px 52px;
            box-shadow: var(--shadow-sm);
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--primary);
            line-height: 1.3;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--primary-light);
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 1.02rem;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 20px 24px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .article-body li {
            margin-bottom: 6px;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 28px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 18px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--accent-hover);
        }
        .article-body .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-body .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .article-body .article-not-found h2 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .article-body .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-body .article-not-found .btn {
            display: inline-flex;
        }

        @media (max-width: 768px) {
            .article-main {
                padding: 24px 0 40px;
            }
            .article-body {
                padding: 24px 20px;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .article-body p {
                font-size: 0.95rem;
            }
        }

        /* --- 文章标签 --- */
        .article-tags {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-tags .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 16px;
            background: var(--bg-section-alt);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
            transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .article-tags .tag:hover {
            background: var(--accent-light);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* --- 分享 --- */
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }
        .article-share .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-share a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--bg-section-alt);
            border-radius: 50%;
            color: var(--text-secondary);
            font-size: 1rem;
            transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .article-share a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-section-alt);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-header h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .related-section .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-section-alt);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-category {
            display: inline-block;
            padding: 2px 12px;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 0.7rem;
            font-weight: 600;
            border-radius: 50px;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-meta i {
            color: var(--accent);
            font-size: 0.7rem;
        }

        @media (max-width: 768px) {
            .related-section {
                padding: 40px 0 50px;
            }
            .related-section .section-header h2 {
                font-size: 1.5rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            padding: 60px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 26, 46, 0.92) 0%, rgba(11, 26, 46, 0.78) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.05rem;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-section .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 40px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.6);
            padding: 60px 0 0;
            border-top: 1px solid var(--border-light);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-light);
        }
        .footer-brand .site-logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.45);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-bottom: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.1rem;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: var(--accent);
        }
        .footer-bottom a:hover {
            text-decoration: underline;
        }

        @media (max-width: 820px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .gap-1 {
            gap: 8px;
        }
        .gap-2 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-secondary);
        }

        /* ===== 文章未找到 专门样式 ===== */
        .not-found-wrapper {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .not-found-wrapper i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-wrapper h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-wrapper p {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }
        .not-found-wrapper .btn {
            display: inline-flex;
        }