/* roulang page: index */
/* ===== 设计变量 & 基础重置 ===== */
        :root {
            --brand-50: #fdf2f2;
            --brand-100: #fbe3e3;
            --brand-500: #d94b4b;
            --brand-600: #c23333;
            --brand-700: #a22828;
            --accent-500: #0d8be0;
            --accent-600: #016ebf;
            --warm-400: #ebb77d;
            --warm-500: #e2984e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --bg-body: #fcfaf7;
            --bg-card: #ffffff;
            --border-light: #eae6e0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.05);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --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; -webkit-font-smoothing: antialiased; }

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.7;
            font-size: 1rem;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        a:focus-visible { outline: 3px solid var(--accent-500); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; border: none; background: none; font-family: inherit; }
        button:focus-visible { outline: 3px solid var(--accent-500); outline-offset: 2px; border-radius: 8px; }
        input:focus-visible { outline: 3px solid var(--accent-500); outline-offset: 2px; }

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

        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== 排版 ===== */
        .heading-xl {
            font-family: 'Playfair Display', 'Noto Serif SC', serif;
            font-size: clamp(2.2rem, 5.5vw, 4rem);
            line-height: 1.15;
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        .heading-lg {
            font-size: clamp(1.8rem, 3.5vw, 2.8rem);
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .heading-md {
            font-size: clamp(1.3rem, 2.2vw, 1.8rem);
            line-height: 1.3;
            font-weight: 600;
        }
        .heading-sm {
            font-size: clamp(1.1rem, 1.6vw, 1.3rem);
            font-weight: 600;
            line-height: 1.4;
        }
        .body-lg { font-size: 1.125rem; line-height: 1.8; color: var(--text-secondary); }
        .body-md { font-size: 1rem; line-height: 1.7; color: var(--text-secondary); }
        .body-sm { font-size: 0.875rem; line-height: 1.6; color: var(--text-muted); }

        .section-padding { padding: 80px 0; }
        .section-padding-sm { padding: 56px 0; }

        @media (max-width: 768px) {
            .section-padding { padding: 48px 0; }
            .section-padding-sm { padding: 36px 0; }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--brand-500);
            color: #fff;
            border-color: var(--brand-500);
        }
        .btn-primary:hover {
            background: var(--brand-600);
            border-color: var(--brand-600);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(194, 51, 51, 0.3);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(194, 51, 51, 0.2); }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border-light);
        }
        .btn-secondary:hover {
            background: var(--brand-50);
            border-color: var(--brand-500);
            color: var(--brand-500);
            transform: translateY(-2px);
        }
        .btn-secondary:active { transform: translateY(0); }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.5);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent-500);
            color: #fff;
            border-color: var(--accent-500);
        }
        .btn-accent:hover {
            background: var(--accent-600);
            border-color: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(13, 139, 224, 0.3);
        }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .card-image { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
        .card-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--brand-50);
            color: var(--brand-500);
        }
        .badge-accent {
            background: #e8f4fd;
            color: var(--accent-600);
        }
        .badge-warm {
            background: #fef6ed;
            color: #b46227;
        }
        .badge-outline {
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(234, 230, 224, 0.5);
            box-shadow: var(--shadow-sm);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-700));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .logo i { -webkit-text-fill-color: var(--brand-500); font-size: 1.1em; }
        .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
        .nav-links a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--brand-500);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover { color: var(--brand-500); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active {
            color: var(--brand-500);
            font-weight: 600;
        }
        .nav-links a.active::after { width: 100%; }
        .nav-cta { margin-left: 8px; }
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--text-primary); padding: 8px; }

        @media (max-width: 880px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 24px 32px 32px;
                gap: 16px;
                box-shadow: 0 20px 40px rgba(0,0,0,0.08);
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--border-light);
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a { font-size: 1.05rem; padding: 10px 0; width: 100%; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }
        }

        @media (max-width: 480px) {
            .nav-container { height: 64px; padding: 0 16px; }
            .logo { font-size: 1.15rem; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #1a1a2e;
            color: rgba(255,255,255,0.8);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { -webkit-text-fill-color: #f4a0a0; font-size: 1.3rem; }
        .footer-brand p { margin-top: 12px; color: rgba(255,255,255,0.55); font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer-col a { color: rgba(255,255,255,0.55); font-size: 0.88rem; transition: var(--transition); }
        .footer-col a:hover { color: var(--warm-400); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--warm-400); }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 480px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #1a1a2e 0%, #2d1f3a 40%, #3d1f2a 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(217,75,75,0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 50%, rgba(13,139,224,0.10) 0%, transparent 60%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 80px 24px;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.12);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 24px;
        }
        .hero h1 {
            color: #fff;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.7);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 36px;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stat { display: flex; gap: 40px; margin-top: 48px; }
        .hero-stat-item { text-align: left; }
        .hero-stat-item .num { font-size: 2rem; font-weight: 700; color: #fff; line-height: 1.2; }
        .hero-stat-item .label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero-content { padding: 60px 16px; }
            .hero p { font-size: 1.05rem; }
            .hero-stat { gap: 24px; flex-wrap: wrap; }
            .hero-stat-item .num { font-size: 1.6rem; }
        }
        @media (max-width: 480px) {
            .hero { min-height: 60vh; }
            .hero-content { padding: 48px 16px; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
        }

        /* ===== 板块标题 ===== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .subtitle {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--brand-500);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 12px;
        }
        .section-header h2 { margin-bottom: 16px; }
        .section-header p { max-width: 580px; margin: 0 auto; color: var(--text-muted); font-size: 1.05rem; }

        @media (max-width: 768px) {
            .section-header { margin-bottom: 32px; }
        }

        /* ===== 分类卡片网格 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .category-card-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            transition: var(--transition);
        }
        .category-card:hover .category-card-bg { transform: scale(1.05); }
        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.15) 60%, rgba(0,0,0,0.05) 100%);
        }
        .category-card-body {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            color: #fff;
            width: 100%;
        }
        .category-card-body .badge {
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            color: #fff;
            border: 1px solid rgba(255,255,255,0.2);
            margin-bottom: 12px;
        }
        .category-card-body h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
        .category-card-body p { font-size: 0.92rem; color: rgba(255,255,255,0.75); margin-bottom: 16px; max-width: 360px; }
        .category-card-body .btn {
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            color: #fff;
            border: 1px solid rgba(255,255,255,0.25);
        }
        .category-card-body .btn:hover {
            background: rgba(255,255,255,0.22);
            border-color: #fff;
        }

        @media (max-width: 768px) {
            .category-grid { grid-template-columns: 1fr; gap: 20px; }
            .category-card { min-height: 280px; }
            .category-card-body { padding: 24px 20px; }
            .category-card-body h3 { font-size: 1.3rem; }
        }

        /* ===== 资讯 / 内容列表 ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card { display: flex; flex-direction: column; }
        .post-card .card-image { aspect-ratio: 16/10; }
        .post-card .card-body { flex: 1; display: flex; flex-direction: column; }
        .post-card .card-body .badge { align-self: flex-start; margin-bottom: 10px; }
        .post-card .card-body .card-title { flex: 1; }
        .post-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .post-card .card-meta a { color: var(--brand-500); font-weight: 500; }
        .post-card .card-meta a:hover { color: var(--brand-600); }

        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-light);
        }
        .empty-state i { font-size: 2.4rem; margin-bottom: 12px; opacity: 0.5; }
        .empty-state p { font-size: 1rem; }

        @media (max-width: 1024px) {
            .post-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .post-grid { grid-template-columns: 1fr; }
        }

        /* ===== 数据 / 数位 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--brand-500), var(--warm-500));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .label { font-size: 0.9rem; color: var(--text-secondary); margin-top: 6px; font-weight: 500; }

        @media (max-width: 880px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 480px) {
            .stats-grid { grid-template-columns: 1fr; }
            .stat-card .num { font-size: 2rem; }
        }

        /* ===== 流程 / 步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 40px 24px 32px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--brand-50);
            color: var(--brand-500);
            font-size: 1.4rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            transition: var(--transition);
        }
        .step-card:hover .step-number {
            background: var(--brand-500);
            color: #fff;
        }
        .step-card h4 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); max-width: 280px; margin: 0 auto; }

        @media (max-width: 768px) {
            .steps-grid { grid-template-columns: 1fr; gap: 20px; }
            .step-card { padding: 28px 20px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--brand-200); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover { color: var(--brand-500); }
        .faq-question i { color: var(--brand-500); transition: var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .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-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media (max-width: 600px) {
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .faq-answer { padding: 0 18px; font-size: 0.9rem; }
            .faq-item.open .faq-answer { padding: 0 18px 16px; }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a1a2e 0%, #2d1f3a 50%, #3d1f2a 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(217,75,75,0.12) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 50%, rgba(13,139,224,0.08) 0%, transparent 60%);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .cta-content h2 { color: #fff; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.6); font-size: 1.1rem; margin-bottom: 32px; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        @media (max-width: 480px) {
            .cta-section { padding: 56px 0; }
            .cta-actions { flex-direction: column; }
            .cta-actions .btn { width: 100%; justify-content: center; }
        }

        /* ===== 关于 / 介绍 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        .intro-text h2 { margin-bottom: 16px; }
        .intro-text p { margin-bottom: 20px; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 20px; }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            font-weight: 500;
        }
        .intro-feature i { color: var(--brand-500); font-size: 1.1rem; width: 20px; text-align: center; }

        @media (max-width: 880px) {
            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-image { aspect-ratio: 16/9; }
            .intro-features { grid-template-columns: 1fr; }
        }

        /* ===== 实用工具 ===== */
        .text-brand { color: var(--brand-500); }
        .text-accent { color: var(--accent-500); }
        .bg-brand-soft { background: var(--brand-50); }
        .bg-accent-soft { background: #e8f4fd; }
        .bg-warm-soft { background: #fef6ed; }
        .border-brand { border-color: var(--brand-200); }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            .hero-stat { flex-direction: column; gap: 16px; }
            .hero-stat-item { display: flex; align-items: baseline; gap: 8px; }
            .hero-stat-item .label { margin-top: 0; }
        }

        /* ===== 动效 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.7s ease, transform 0.7s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 间距微调 ===== */
        .gap-section { gap: 80px; }
        @media (max-width: 768px) { .gap-section { gap: 48px; } }

/* roulang page: category1 */
:root {
            --primary: #c0392b;
            --primary-light: #e74c3c;
            --primary-dark: #a93226;
            --primary-muted: #fadbd8;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #d4a017;
            --accent-light: #e6b93e;
            --neutral-light: #f8f5f0;
            --neutral: #f0ebe3;
            --neutral-dark: #e0d8cc;
            --text-primary: #1e1e1e;
            --text-secondary: #5a5a5a;
            --text-muted: #8a8a8a;
            --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-display: 'Playfair Display', 'Noto Serif SC', serif;
            --radius: 0.75rem;
            --radius-xl: 1rem;
            --radius-2xl: 1.5rem;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px 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;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: #ffffff;
            line-height: 1.6;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            transition: var(--transition);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }
        /* header & nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.08);
        }
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-family: var(--font-display);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }
        .nav-links li a {
            display: block;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-links li a:hover {
            color: var(--primary);
            background: var(--primary-muted);
        }
        .nav-links li a.active {
            color: var(--primary);
            background: var(--primary-muted);
            font-weight: 600;
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta .btn {
            padding: 0.5rem 1.25rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-cta .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 15px rgba(192, 57, 43, 0.35);
        }
        .nav-cta .btn i {
            font-size: 0.75rem;
            transition: transform 0.3s;
        }
        .nav-cta .btn:hover i {
            transform: translateX(3px);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.25rem;
            border-radius: 0.5rem;
        }
        .nav-toggle:hover {
            background: var(--neutral-light);
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                gap: 0.25rem;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-links li a {
                padding: 0.75rem 1rem;
                font-size: 1rem;
            }
            .nav-links li a.active::after {
                display: none;
            }
            .nav-cta {
                margin-top: 0.5rem;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
                padding: 0.75rem 1.25rem;
            }
        }
        @media (max-width: 480px) {
            .nav-container {
                padding: 0 1rem;
                height: 60px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
        }
        /* page banner */
        .page-banner {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, #f8f5f0 0%, #f0ebe3 50%, #e8e0d5 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            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: 0.25;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-family: var(--font-display);
            font-size: 3rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
            margin-top: 1.5rem;
        }
        .page-banner .badge {
            display: inline-block;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(4px);
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid rgba(0, 0, 0, 0.06);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 110px 0 40px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }
        @media (max-width: 480px) {
            .page-banner h1 {
                font-size: 1.6rem;
            }
        }
        /* sections */
        section {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            section {
                padding: 3rem 0;
            }
        }
        .section-title {
            font-family: var(--font-display);
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 1.75rem;
            }
        }
        /* cards */
        .card {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 1.5rem;
        }
        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .card-body .tag {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 999px;
            background: var(--primary-muted);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 500;
            margin-bottom: 0.75rem;
        }
        /* trend grid */
        .trend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 1024px) {
            .trend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .trend-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }
        /* feature row */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        @media (max-width: 768px) {
            .feature-row {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .feature-row.reverse {
                direction: ltr;
            }
            .feature-row.reverse .feature-img {
                order: -1;
            }
        }
        .feature-img {
            border-radius: var(--radius-2xl);
            box-shadow: var(--shadow-card);
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }
        .feature-content h3 {
            font-family: var(--font-display);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }
        .feature-content p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        .feature-content .feature-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .feature-content .feature-list li i {
            color: var(--primary);
            font-size: 0.9rem;
            margin-top: 0.25rem;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .feature-content h3 {
                font-size: 1.4rem;
            }
        }
        /* stat numbers */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .stat-item .stat-number {
            font-family: var(--font-display);
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 0.25rem;
        }
        @media (max-width: 768px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .stat-item .stat-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
        }
        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--neutral-light);
            border-radius: var(--radius);
            border: 1px solid rgba(0, 0, 0, 0.04);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-muted);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.1rem 1.5rem;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 1rem;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 0.9rem 1.1rem;
                font-size: 0.92rem;
            }
            .faq-answer.open {
                padding: 0 1.1rem 1rem;
            }
        }
        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #1a252f 100%);
            color: #fff;
            text-align: center;
            padding: 5rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-family: var(--font-display);
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.25;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.85;
            max-width: 560px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .cta-section .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 2.2rem;
            border-radius: 999px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .cta-section .btn:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(192, 57, 43, 0.4);
        }
        .cta-section .btn i {
            transition: transform 0.3s;
        }
        .cta-section .btn:hover i {
            transform: translateX(4px);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 3.5rem 0;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }
        /* footer */
        .site-footer {
            background: #1e1e1e;
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
        }
        .footer-brand .logo i {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            opacity: 0.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 3px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .site-footer {
                padding: 2.5rem 0 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
        }
        /* tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .tag-cloud a {
            display: inline-block;
            padding: 0.35rem 1rem;
            border-radius: 999px;
            background: #fff;
            border: 1px solid rgba(0, 0, 0, 0.08);
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .tag-cloud a:hover {
            background: var(--primary-muted);
            border-color: var(--primary);
            color: var(--primary);
        }
        /* list cards */
        .list-card {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 1.5rem;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            align-items: flex-start;
        }
        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .list-card .num {
            font-family: var(--font-display);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-muted);
            line-height: 1;
            flex-shrink: 0;
            min-width: 2.5rem;
        }
        .list-card .content h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 0.3rem;
        }
        .list-card .content p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 640px) {
            .list-card {
                flex-direction: column;
                padding: 1rem 1.25rem;
            }
            .list-card .num {
                font-size: 1.5rem;
            }
        }
        /* breadcrumb */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            justify-content: center;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text-secondary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        @media (max-width: 640px) {
            .breadcrumb {
                font-size: 0.78rem;
            }
        }
        /* utility */
        .bg-neutral-light {
            background: var(--neutral-light);
        }
        .bg-neutral {
            background: var(--neutral);
        }
        .text-center {
            text-align: center;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }
        .mb-4 {
            margin-bottom: 2rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mt-4 {
            margin-top: 2rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        @media (max-width: 640px) {
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --accent: #c8a96e;
            --accent-light: #dfc99a;
            --accent-dark: #a8884e;
            --bg-light: #f8f6f2;
            --bg-white: #ffffff;
            --bg-dark: #1a2a3a;
            --text-dark: #1e2a3a;
            --text-body: #3a4a5a;
            --text-muted: #7a8a9a;
            --text-light: #f0ece6;
            --border: #e2ddd6;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(26, 42, 58, 0.06);
            --shadow: 0 8px 32px rgba(26, 42, 58, 0.08);
            --shadow-lg: 0 20px 60px rgba(26, 42, 58, 0.12);
            --shadow-accent: 0 8px 32px rgba(200, 169, 110, 0.25);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== 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: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
        }

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

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

        a:hover {
            color: var(--accent);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
            letter-spacing: -0.3px;
        }

        .logo i {
            font-size: 1.4rem;
            color: var(--accent);
        }

        .logo:hover {
            color: var(--primary-dark);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-links li a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-body);
            transition: all var(--transition);
            position: relative;
        }

        .nav-links li a:hover {
            background: rgba(26, 58, 92, 0.06);
            color: var(--primary);
        }

        .nav-links li a.active {
            background: var(--primary);
            color: #fff;
        }

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

        .nav-cta .btn {
            padding: 10px 24px;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            margin-left: 8px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(26, 58, 92, 0.06);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 2px solid var(--border);
                box-shadow: var(--shadow);
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 4px;
            }

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

            .nav-links li a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                margin-top: 8px;
                width: 100%;
            }

            .nav-cta .btn {
                width: 100%;
                justify-content: center;
                margin-left: 0;
                text-align: center;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border: none;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

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

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

        .btn-accent {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: var(--shadow-accent);
        }

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

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }

        .btn-lg {
            padding: 18px 40px;
            font-size: 1.1rem;
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark);
            overflow: hidden;
            padding: 80px 24px 60px;
        }

        .page-banner .bg-img {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.45;
            transition: opacity 0.6s;
        }

        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 42, 58, 0.7) 0%, rgba(26, 42, 58, 0.3) 100%);
        }

        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
        }

        .page-banner h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }

        .page-banner p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.7;
            max-width: 600px;
            margin: 0 auto;
        }

        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .page-banner .breadcrumb a:hover {
            color: #fff;
        }

        .page-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }

        @media (max-width: 768px) {
            .page-banner {
                min-height: 280px;
                padding: 60px 16px 40px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.8rem;
            }
        }

        /* ===== Section spacing ===== */
        .section {
            padding: 80px 0;
        }

        .section-sm {
            padding: 50px 0;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 48px;
            line-height: 1.7;
        }

        .section-title-center {
            text-align: center;
        }

        .section-subtitle-center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }

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

        .card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            display: block;
            transition: transform 0.6s;
        }

        .card:hover .card-img {
            transform: scale(1.03);
        }

        .card-body {
            padding: 24px 28px 28px;
        }

        .card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card-body p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(200, 169, 110, 0.15);
            color: var(--accent-dark);
            margin-bottom: 12px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== Featured / Highlight block ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .feature-block .feature-img {
            width: 100%;
            height: 100%;
            min-height: 340px;
            object-fit: cover;
        }

        .feature-block .feature-content {
            padding: 48px 48px 48px 0;
        }

        .feature-block .feature-content .tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--accent);
            color: var(--primary-dark);
            margin-bottom: 16px;
        }

        .feature-block .feature-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .feature-block .feature-content p {
            font-size: 1.05rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        @media (max-width: 768px) {
            .feature-block {
                grid-template-columns: 1fr;
                gap: 0;
            }
            .feature-block .feature-content {
                padding: 32px 24px;
            }
            .feature-block .feature-content h2 {
                font-size: 1.5rem;
            }
            .feature-block .feature-img {
                min-height: 220px;
            }
            .feature-block.reverse .feature-content {
                order: 1;
            }
            .feature-block.reverse .feature-img {
                order: 0;
            }
        }

        .feature-block.reverse .feature-content {
            padding: 48px 0 48px 48px;
        }

        @media (max-width: 768px) {
            .feature-block.reverse .feature-content {
                padding: 32px 24px;
            }
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

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

        .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .num {
                font-size: 2rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 20px 0;
        }

        .faq-item:first-child {
            padding-top: 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.1rem;
            color: var(--primary-dark);
            padding: 4px 0;
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question i {
            font-size: 1.2rem;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px 0 0;
            color: var(--text-body);
            font-size: 0.98rem;
            line-height: 1.8;
        }

        .faq-answer.open {
            max-height: 300px;
            padding-top: 12px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: var(--primary-dark);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at top right, rgba(200, 169, 110, 0.12), transparent 70%);
            pointer-events: none;
        }

        .cta-block h2 {
            font-size: 2.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-block p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        .cta-block .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        @media (max-width: 768px) {
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 1.7rem;
            }
            .cta-block p {
                font-size: 1rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }

        .footer-brand .logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }

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

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(200, 169, 110, 0.12);
            color: var(--accent-dark);
            border: 1px solid rgba(200, 169, 110, 0.2);
        }

        .badge-primary {
            background: rgba(26, 58, 92, 0.08);
            color: var(--primary);
            border-color: rgba(26, 58, 92, 0.12);
        }

        /* ===== Timeline / list ===== */
        .timeline-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }

        .timeline-item:last-child {
            border-bottom: none;
        }

        .timeline-num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent);
            min-width: 48px;
            line-height: 1.2;
        }

        .timeline-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .timeline-content p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }

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

        .bg-accent-soft {
            background: rgba(200, 169, 110, 0.06);
        }

        .bg-primary-soft {
            background: rgba(26, 58, 92, 0.04);
        }

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

        .gap-section {
            margin-bottom: 80px;
        }

        @media (max-width: 768px) {
            .gap-section {
                margin-bottom: 50px;
            }
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Additional responsive ===== */
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cta-block h2 {
                font-size: 1.4rem;
            }
            .stat-item .num {
                font-size: 1.6rem;
            }
            .card-body {
                padding: 18px 20px 22px;
            }
            .nav-container {
                padding: 0 16px;
                height: 62px;
            }
            .logo {
                font-size: 1rem;
            }
            .logo i {
                font-size: 1.1rem;
            }
        }

/* roulang page: article */
:root {
            --brand-dark: #0f1729;
            --brand-primary: #1a2a4a;
            --brand-accent: #c9a84c;
            --brand-light: #f0ede8;
            --brand-muted: #8a8f9a;
            --brand-card: #ffffff;
            --brand-text: #1e1e2a;
            --brand-soft: #f8f6f3;
            --radius-card: 1rem;
            --radius-btn: 0.75rem;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
            --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
            --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--brand-soft);
            color: var(--brand-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Site Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            box-shadow: var(--shadow-nav, 0 2px 16px rgba(0, 0, 0, 0.06));
            transition: background var(--transition-base), box-shadow var(--transition-base);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-primary);
            letter-spacing: 0.02em;
            transition: opacity var(--transition-base);
        }

        .logo i {
            font-size: 1.6rem;
            color: var(--brand-accent);
        }

        .logo:hover {
            opacity: 0.85;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li {
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--brand-text);
            border-radius: 0.5rem;
            transition: background var(--transition-base), color var(--transition-base);
        }

        .nav-links a:hover {
            background: rgba(201, 168, 76, 0.10);
            color: var(--brand-primary);
        }

        .nav-links a.active {
            color: var(--brand-accent);
            font-weight: 600;
        }

        .nav-links .nav-cta a {
            padding: 0.5rem 1.25rem;
            background: var(--brand-accent);
            color: #fff;
            border-radius: 2rem;
            font-weight: 600;
            margin-left: 0.5rem;
            box-shadow: var(--shadow-btn, 0 4px 14px rgba(201, 168, 76, 0.30));
            transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }

        .nav-links .nav-cta a:hover {
            background: #b8973a;
            box-shadow: var(--shadow-btn-hover, 0 6px 24px rgba(201, 168, 76, 0.45));
            transform: translateY(-1px);
        }

        .nav-links .nav-cta a i {
            margin-left: 0.35rem;
            font-size: 0.85rem;
            transition: transform var(--transition-base);
        }

        .nav-links .nav-cta a:hover i {
            transform: translateX(3px);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--brand-primary);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: 0.5rem;
            transition: background var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        @media (max-width: 900px) {
            .nav-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-bottom: 1px solid rgba(0, 0, 0, 0.06);
                padding: 1rem 1.5rem 1.5rem;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
                gap: 0.25rem;
            }

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

            .nav-links a {
                padding: 0.75rem 1rem;
                font-size: 1.05rem;
                border-radius: 0.5rem;
                width: 100%;
            }

            .nav-links .nav-cta a {
                margin-left: 0;
                margin-top: 0.5rem;
                text-align: center;
                padding: 0.75rem 1.5rem;
            }

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

        @media (max-width: 520px) {
            .nav-container {
                padding: 0 1rem;
                height: 62px;
            }

            .logo {
                font-size: 1.15rem;
            }

            .logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 8rem 0 3.5rem;
            margin-top: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 360px;
            display: flex;
            align-items: flex-end;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 41, 0.30) 0%, rgba(15, 23, 41, 0.72) 100%);
            z-index: 1;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .article-hero .article-category {
            display: inline-block;
            background: var(--brand-accent);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.3rem 1rem;
            border-radius: 2rem;
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
            text-transform: uppercase;
        }

        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin: 0 0 1rem;
            max-width: 860px;
            letter-spacing: 0.01em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }

        .article-hero .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.25rem 2rem;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.92rem;
            font-weight: 400;
            align-items: center;
        }

        .article-hero .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-hero .article-meta i {
            font-size: 0.9rem;
            color: var(--brand-accent);
        }

        .article-hero .article-meta .reading-time {
            background: rgba(255, 255, 255, 0.12);
            padding: 0.2rem 0.9rem;
            border-radius: 2rem;
            backdrop-filter: blur(4px);
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 7rem 0 2.5rem;
                min-height: 300px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .article-meta {
                gap: 0.75rem 1.25rem;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .article-hero {
                padding: 6rem 0 2rem;
                min-height: 240px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .article-meta {
                flex-direction: column;
                gap: 0.4rem;
                align-items: flex-start;
            }
        }

        /* ===== Article Body ===== */
        .article-body-wrap {
            padding: 3rem 0 2rem;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            align-items: start;
        }

        .article-content {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2.5rem 3rem;
            font-size: 1.05rem;
            line-height: 1.9;
            color: #2a2a3a;
        }

        .article-content p {
            margin: 0 0 1.5rem;
        }

        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--brand-primary);
            margin: 2.5rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--brand-light);
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--brand-primary);
            margin: 2rem 0 0.75rem;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.5rem;
            padding-left: 1.75rem;
        }

        .article-content li {
            margin-bottom: 0.4rem;
        }

        .article-content blockquote {
            margin: 1.5rem 0;
            padding: 1.25rem 1.75rem;
            background: var(--brand-light);
            border-left: 4px solid var(--brand-accent);
            border-radius: 0 0.75rem 0.75rem 0;
            color: #3a3a4a;
            font-style: italic;
        }

        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: 0.75rem;
            margin: 1.75rem auto;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .article-content a {
            color: var(--brand-accent);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-content a:hover {
            color: #b8973a;
        }

        .article-content code {
            background: var(--brand-light);
            padding: 0.2em 0.5em;
            border-radius: 0.35rem;
            font-size: 0.9em;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
        }

        .article-content pre {
            background: var(--brand-dark);
            color: #e8e4dd;
            padding: 1.5rem;
            border-radius: 0.75rem;
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.5rem 0;
        }

        .article-content pre code {
            background: none;
            padding: 0;
            color: inherit;
            font-size: inherit;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem 1.75rem;
        }

        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--brand-primary);
            margin: 0 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid var(--brand-light);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card h4 i {
            color: var(--brand-accent);
            font-size: 1.1rem;
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .sidebar-tags span {
            background: var(--brand-light);
            padding: 0.3rem 0.9rem;
            border-radius: 2rem;
            font-size: 0.82rem;
            color: var(--brand-text);
            font-weight: 500;
            transition: background var(--transition-base), color var(--transition-base);
            cursor: default;
        }

        .sidebar-tags span:hover {
            background: var(--brand-accent);
            color: #fff;
        }

        .sidebar-share {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .sidebar-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-light);
            color: var(--brand-text);
            font-size: 1.1rem;
            transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
        }

        .sidebar-share a:hover {
            background: var(--brand-accent);
            color: #fff;
            transform: translateY(-2px);
        }

        .sidebar-related-item {
            display: flex;
            gap: 0.75rem;
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            align-items: center;
        }

        .sidebar-related-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-related-item img {
            width: 60px;
            height: 60px;
            border-radius: 0.5rem;
            object-fit: cover;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
        }

        .sidebar-related-item .related-info {
            flex: 1;
            min-width: 0;
        }

        .sidebar-related-item .related-info a {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--brand-text);
            line-height: 1.3;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-base);
        }

        .sidebar-related-item .related-info a:hover {
            color: var(--brand-accent);
        }

        .sidebar-related-item .related-info .related-date {
            font-size: 0.75rem;
            color: var(--brand-muted);
            margin-top: 0.2rem;
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .article-content {
                padding: 2rem;
            }
        }

        @media (max-width: 640px) {
            .article-content {
                padding: 1.5rem 1.25rem;
                font-size: 0.98rem;
            }
            .article-content h2 {
                font-size: 1.35rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .article-sidebar {
                grid-template-columns: 1fr;
            }
            .article-body-wrap {
                padding: 2rem 0 1rem;
            }
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 3rem 0 4rem;
            background: var(--brand-soft);
        }

        .related-section .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--brand-primary);
            margin: 0 0 0.5rem;
        }

        .related-section .section-subtitle {
            color: var(--brand-muted);
            font-size: 1rem;
            margin-bottom: 2rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

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

        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }

        .related-card .card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }

        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--brand-accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.4rem;
        }

        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-text);
            margin: 0 0 0.5rem;
            line-height: 1.35;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--brand-muted);
            margin: 0 0 0.75rem;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body .card-date {
            font-size: 0.78rem;
            color: var(--brand-muted);
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .related-card .card-body .card-date i {
            font-size: 0.75rem;
            color: var(--brand-accent);
        }

        @media (max-width: 900px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 560px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card .card-img {
                height: 180px;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 4rem 0;
            background: var(--brand-primary);
            color: #fff;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin: 0 0 0.75rem;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 2rem;
        }

        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: var(--brand-accent);
            color: #fff;
            padding: 0.85rem 2.5rem;
            border-radius: 2rem;
            font-size: 1.05rem;
            font-weight: 700;
            box-shadow: var(--shadow-btn, 0 4px 20px rgba(201, 168, 76, 0.35));
            transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }

        .cta-section .btn-cta:hover {
            background: #b8973a;
            box-shadow: var(--shadow-btn-hover, 0 8px 30px rgba(201, 168, 76, 0.50));
            transform: translateY(-2px);
        }

        .cta-section .btn-cta i {
            font-size: 0.95rem;
            transition: transform var(--transition-base);
        }

        .cta-section .btn-cta:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 640px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta {
                padding: 0.75rem 2rem;
                font-size: 0.95rem;
            }
        }

        /* ===== Site Footer ===== */
        .site-footer {
            background: var(--brand-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .site-footer .footer-brand .logo {
            color: #fff;
            margin-bottom: 1rem;
            font-size: 1.3rem;
        }

        .site-footer .footer-brand .logo i {
            color: var(--brand-accent);
        }

        .site-footer .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
            max-width: 320px;
        }

        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 1.25rem;
        }

        .site-footer .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .site-footer .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-base);
        }

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

        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 560px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.75rem;
            }
            .site-footer {
                padding-top: 2.5rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 6rem 2rem;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        .empty-state i {
            font-size: 3.5rem;
            color: var(--brand-light);
            margin-bottom: 1.5rem;
        }

        .empty-state h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--brand-primary);
            margin: 0 0 0.5rem;
        }

        .empty-state p {
            color: var(--brand-muted);
            margin-bottom: 1.5rem;
        }

        .empty-state .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--brand-primary);
            color: #fff;
            padding: 0.7rem 1.75rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: background var(--transition-base), transform var(--transition-base);
        }

        .empty-state .btn-back:hover {
            background: var(--brand-accent);
            transform: translateY(-2px);
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--brand-light);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--brand-muted);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--brand-accent);
        }

        /* ===== Focus visible ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--brand-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }