/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1e2e;
            --primary-light: #1a2f44;
            --secondary: #e8a838;
            --secondary-hover: #d4952f;
            --accent: #f0b84d;
            --bg-body: #f4f6f8;
            --bg-card: #ffffff;
            --bg-dark: #0b1725;
            --text-primary: #1a1a2e;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --gap: 30px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-base);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }

        /* ===== Container ===== */
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .container-fluid { width: 100%; padding: 0 24px; }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-dark);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.30);
            border-bottom: 2px solid var(--secondary);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i { color: var(--secondary); font-size: 1.6rem; }
        .logo span { color: var(--secondary); }
        .logo:hover { color: var(--text-white); opacity: 0.9; }
        .nav-menu { display: flex; align-items: center; gap: 8px; }
        .nav-menu a {
            color: var(--text-white);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover { background: rgba(232, 168, 56, 0.15); color: var(--secondary); }
        .nav-menu a.active { background: var(--secondary); color: var(--bg-dark); font-weight: 600; }
        .nav-toggle { display: none; background: none; border: none; color: var(--text-white); font-size: 1.6rem; cursor: pointer; padding: 4px; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(11,23,37,0.92) 0%, rgba(15,30,46,0.80) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            color: var(--text-white);
            padding: 80px 24px;
        }
        .hero-content { max-width: 860px; position: relative; z-index: 2; }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            text-shadow: 0 4px 30px rgba(0,0,0,0.40);
        }
        .hero h1 span { color: var(--secondary); }
        .hero .subtitle {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 36px;
            line-height: 1.7;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: var(--secondary); color: var(--bg-dark); }
        .btn-primary:hover { background: var(--secondary-hover); color: var(--bg-dark); transform: translateY(-2px); box-shadow: 0 10px 30px rgba(232,168,56,0.30); }
        .btn-outline { background: transparent; color: var(--text-white); border: 2px solid rgba(255,255,255,0.50); }
        .btn-outline:hover { background: rgba(255,255,255,0.10); border-color: var(--secondary); color: var(--secondary); transform: translateY(-2px); }
        .hero-badge {
            display: inline-block;
            background: rgba(232,168,56,0.18);
            color: var(--secondary);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(232,168,56,0.25);
        }

        /* ===== Section Common ===== */
        .section { padding: 80px 0; }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            text-align: center;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark .section-title { color: var(--text-white); }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.70); }

        /* ===== Features / Cards ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .card-icon { font-size: 2.4rem; color: var(--secondary); margin-bottom: 18px; }
        .card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
        .card p { color: var(--text-secondary); line-height: 1.7; font-size: 0.95rem; }
        .card-image { border-radius: var(--radius-sm) var(--radius-sm) 0 0; overflow: hidden; margin: -32px -28px 20px; }
        .card-image img { width: 100%; height: 200px; object-fit: cover; border-radius: 0; }

        /* ===== Latest Posts (CMS) ===== */
        .post-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
        .post-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .post-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .post-image { width: 100%; height: 200px; object-fit: cover; }
        .post-body { padding: 20px 24px 24px; flex: 1; display: flex; flex-direction: column; }
        .post-category {
            display: inline-block;
            background: rgba(232,168,56,0.12);
            color: var(--secondary);
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .post-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .post-title a { color: var(--text-primary); }
        .post-title a:hover { color: var(--secondary); }
        .post-excerpt { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; margin-bottom: 12px; flex: 1; }
        .post-meta { font-size: 0.8rem; color: var(--text-light); display: flex; align-items: center; gap: 16px; }
        .post-meta i { margin-right: 4px; }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-secondary);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ===== Stats ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); text-align: center; }
        .stat-item { padding: 28px 16px; }
        .stat-number { font-size: 2.8rem; font-weight: 800; color: var(--secondary); line-height: 1.2; }
        .stat-label { color: rgba(255,255,255,0.80); font-size: 1rem; margin-top: 6px; }

        /* ===== Features Alt (图文混合) ===== */
        .feature-alt { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .feature-alt-image { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
        .feature-alt-image img { width: 100%; height: 380px; object-fit: cover; }
        .feature-alt-content h3 { font-size: 1.8rem; font-weight: 700; margin-bottom: 16px; }
        .feature-alt-content p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
        .feature-alt-content ul { margin-top: 12px; }
        .feature-alt-content ul li { padding: 6px 0; display: flex; align-items: center; gap: 10px; color: var(--text-secondary); }
        .feature-alt-content ul li i { color: var(--secondary); font-size: 1rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 820px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            margin-bottom: 16px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-card);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { background: #fafbfc; }
        .faq-question i { color: var(--secondary); transition: var(--transition); font-size: 1.2rem; }
        .faq-question.active i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #162a3e 100%);
            padding: 80px 24px;
            text-align: center;
            border-top: 3px solid var(--secondary);
        }
        .cta-section h2 { font-size: 2.4rem; font-weight: 700; color: var(--text-white); margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto 32px; font-size: 1.1rem; line-height: 1.7; }

        /* ===== Footer ===== */
        .site-footer {
            background: #08121c;
            color: rgba(255,255,255,0.70);
            padding: 48px 24px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-weight: 600; margin-bottom: 16px; font-size: 1rem; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.60); font-size: 0.9rem; }
        .footer-col ul li a:hover { color: var(--secondary); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.45); }
        .footer-bottom a { color: rgba(255,255,255,0.55); }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .feature-alt { grid-template-columns: 1fr; gap: 32px; }
            .hero h1 { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            .site-header .container { height: 64px; }
            .nav-menu { display: none; flex-direction: column; background: var(--bg-dark); position: absolute; top: 64px; left: 0; right: 0; padding: 16px 24px; box-shadow: 0 10px 40px rgba(0,0,0,0.30); border-bottom: 2px solid var(--secondary); }
            .nav-menu.open { display: flex; }
            .nav-menu a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-toggle { display: block; }
            .hero { min-height: 70vh; padding: 60px 20px; }
            .hero h1 { font-size: 2rem; }
            .hero .subtitle { font-size: 1rem; }
            .grid-3, .grid-2, .post-list { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-number { font-size: 2rem; }
            .section { padding: 48px 0; }
            .section-title { font-size: 1.7rem; }
            .footer-grid { grid-template-columns: 1fr; }
            .feature-alt-image img { height: 240px; }
            .cta-section h2 { font-size: 1.8rem; }
            .btn { padding: 12px 24px; font-size: 0.9rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .hero .subtitle { font-size: 0.9rem; }
            .section-title { font-size: 1.4rem; }
            .card { padding: 24px 20px; }
            .container { padding: 0 16px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mb-12 { margin-bottom: 12px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .badge {
            display: inline-block;
            background: rgba(232,168,56,0.12);
            color: var(--secondary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 46px;
            height: 46px;
            background: var(--secondary);
            color: var(--bg-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(232,168,56,0.30);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
            cursor: pointer;
            border: none;
        }
        .back-top.visible { opacity: 1; visibility: visible; }
        .back-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(232,168,56,0.40); }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b2a4a;
            --primary-light: #144272;
            --primary-dark: #071a30;
            --secondary: #f5a623;
            --secondary-light: #f8c45a;
            --secondary-dark: #d4891a;
            --accent: #e74c3c;
            --bg-light: #f5f7fa;
            --bg-white: #ffffff;
            --bg-dark: #0b1a2e;
            --text-dark: #1a2a3a;
            --text-muted: #5a6a7a;
            --text-light: #f0f4f8;
            --border-color: #e2e8f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.18);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-main: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font-main);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--secondary);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--primary-dark);
            font-weight: 700;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-white);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

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

        .logo span {
            color: var(--secondary);
            font-weight: 700;
        }

        .nav-toggle {
            display: none;
            background: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-menu a {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-menu a:hover,
        .nav-menu a:focus {
            color: var(--primary);
            background: var(--bg-light);
        }

        .nav-menu a.active {
            color: var(--bg-white);
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(11, 42, 74, 0.25);
        }

        .nav-menu a.active:hover {
            background: var(--primary-light);
            color: var(--bg-white);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(11, 42, 74, 0.88) 0%, rgba(7, 26, 48, 0.92) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 80px 24px 100px;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-light), transparent);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }

        .hero-content h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: var(--bg-white);
            margin-bottom: 16px;
            letter-spacing: -1px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .hero-content h1 span {
            color: var(--secondary);
        }

        .hero-content .subtitle {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            line-height: 1.8;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-content .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            border-color: var(--secondary);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-3px);
            box-shadow: 0 10px 32px rgba(245, 166, 35, 0.5);
            color: var(--primary-dark);
        }

        .btn-outline-light {
            background: transparent;
            color: var(--bg-white);
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--bg-white);
            transform: translateY(-3px);
            color: var(--bg-white);
        }

        /* ===== Section shared ===== */
        .section-padding {
            padding: 90px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-title h2 span {
            color: var(--secondary);
        }

        .section-title p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 24px 30px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }

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

        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--bg-white);
            box-shadow: 0 6px 16px rgba(11, 42, 74, 0.2);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--primary-dark);
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Scenarios (适用场景) ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .scenario-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-card .card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .scenario-card .card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.8rem;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }

        .scenario-card .card-body {
            padding: 20px 18px 24px;
        }

        .scenario-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }

        .scenario-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Process / Steps ===== */
        .process-section {
            background: var(--bg-white);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            padding: 30px 18px;
            position: relative;
        }

        .step-item::after {
            content: '';
            position: absolute;
            top: 40px;
            right: -10px;
            width: 20px;
            height: 2px;
            background: var(--border-color);
        }

        .step-item:last-child::after {
            display: none;
        }

        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--bg-white);
            font-size: 1.5rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 6px 18px rgba(11, 42, 74, 0.2);
        }

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

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Stats / 数据认同 ===== */
        .stats-section {
            background: var(--primary-dark);
            color: var(--text-light);
            padding: 70px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item .number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 4px;
        }

        .stat-item .label {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1.02rem;
            color: var(--primary-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
            background: var(--bg-white);
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            background: var(--bg-light);
        }

        .faq-question .arrow {
            font-size: 1.2rem;
            color: var(--secondary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-question[aria-expanded="true"] .arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }

        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 80px 0;
            text-align: center;
            color: var(--bg-white);
        }

        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--bg-white);
            margin-bottom: 14px;
        }

        .cta-section h2 span {
            color: var(--secondary);
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-section .btn {
            font-size: 1.1rem;
            padding: 16px 44px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 30px;
        }

        .site-footer .logo {
            color: var(--bg-white);
            margin-bottom: 12px;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 1.05rem;
            color: var(--bg-white);
            margin-bottom: 16px;
            font-weight: 700;
        }

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .footer-col ul li i {
            margin-right: 8px;
            color: var(--secondary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: var(--secondary);
        }
        .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .hero-content h1 {
                font-size: 2.8rem;
            }
        }

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

            .nav-menu {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
                border-bottom: 2px solid var(--border-color);
                gap: 6px;
            }

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

            .nav-menu a {
                padding: 12px 18px;
                width: 100%;
                text-align: left;
                border-radius: var(--radius-sm);
            }

            .hero-content h1 {
                font-size: 2.2rem;
            }

            .hero-content .subtitle {
                font-size: 1.05rem;
            }

            .section-title h2 {
                font-size: 1.9rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .step-item::after {
                display: none;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .stats-grid .stat-item .number {
                font-size: 2.2rem;
            }

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

            .footer-brand p {
                max-width: 100%;
            }

            .section-padding {
                padding: 60px 0;
            }

            .hero-section {
                min-height: 480px;
                padding: 60px 20px 80px;
            }

            .cta-section h2 {
                font-size: 1.8rem;
            }
        }

        @media screen and (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }

            .hero-content .subtitle {
                font-size: 0.95rem;
            }

            .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
            }

            .section-title h2 {
                font-size: 1.6rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

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

            .feature-card {
                padding: 24px 18px 22px;
            }

            .scenario-card .card-img {
                height: 160px;
            }

            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }

            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.9rem;
            }
        }

        /* ===== 额外辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .gap-row {
            gap: 28px;
        }

        /* Foundation 覆盖微调 */
        .grid-container {
            max-width: var(--max-width);
            padding-left: 24px;
            padding-right: 24px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #D62828;
            --primary-dark: #B71C1C;
            --primary-light: #E85D5D;
            --secondary: #003049;
            --secondary-light: #1B4F72;
            --accent: #F77F00;
            --accent-light: #FDA94F;
            --bg: #F8F9FA;
            --bg-alt: #F1F3F5;
            --bg-dark: #1A1A2E;
            --text: #1D1D1D;
            --text-light: #6C757D;
            --text-white: #FFFFFF;
            --border: #E2E6EA;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.14);
            --shadow-hover: 0 12px 32px rgba(214, 40, 40, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        ul {
            list-style: none;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .logo span {
            color: var(--secondary);
        }
        .logo:hover {
            color: var(--primary-dark);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: rgba(214, 40, 40, 0.06);
        }
        .nav-menu a:hover::after {
            width: 60%;
        }
        .nav-menu a.active {
            color: var(--primary);
            background: rgba(214, 40, 40, 0.08);
        }
        .nav-menu a.active::after {
            width: 60%;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        /* ===== Hero Banner ===== */
        .article-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 60px;
            margin-top: var(--nav-height);
            background: linear-gradient(135deg, rgba(0, 48, 73, 0.88) 0%, rgba(214, 40, 40, 0.78) 100%),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            color: var(--text-white);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(247, 127, 0, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }
        .article-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }
        .article-hero .hero-category {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(247, 127, 0, 0.25);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent-light);
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .article-hero .hero-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            font-size: 0.95rem;
            opacity: 0.9;
            flex-wrap: wrap;
        }
        .article-hero .hero-meta i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== Main Content ===== */
        .article-main {
            padding: 60px 0 40px;
            background: var(--bg);
        }
        .article-body {
            max-width: 800px;
            margin: 0 auto;
            background: var(--text-white);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow);
        }
        .article-body p {
            margin-bottom: 1.2em;
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            font-weight: 700;
            color: var(--secondary);
        }
        .article-body h2 {
            font-size: 1.6rem;
        }
        .article-body h3 {
            font-size: 1.3rem;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.2em;
            padding-left: 24px;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(214, 40, 40, 0.05);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--accent);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--text-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
            display: block;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-not-found .btn {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 50px;
            background: var(--primary);
            color: var(--text-white);
            font-weight: 600;
            transition: var(--transition);
        }
        .article-not-found .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .related-section .section-title p {
            color: var(--text-light);
            font-size: 1.05rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .related-card {
            background: var(--text-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img {
            transform: scale(1.06);
        }
        .related-card .card-img .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(214, 40, 40, 0.9);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
        }
        .related-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--secondary);
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            flex: 1;
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .related-card .card-body .card-link {
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .card-body .card-link i {
            font-size: 0.8rem;
            transition: var(--transition);
        }
        .related-card .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--text-white);
        }
        .faq-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .faq-section .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .faq-section .section-title p {
            color: var(--text-light);
            font-size: 1.05rem;
        }

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

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            background: var(--bg);
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 1.2rem;
        }
        .faq-item .faq-question:hover {
            background: rgba(214, 40, 40, 0.05);
        }
        .faq-item .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item .faq-answer p {
            padding-bottom: 18px;
        }
        .faq-item.active .faq-question {
            background: rgba(214, 40, 40, 0.06);
            color: var(--primary);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary-dark) 100%),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            background-blend-mode: overlay;
            color: var(--text-white);
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(247, 127, 0, 0.2) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-cta {
            display: inline-block;
            padding: 16px 48px;
            border-radius: 50px;
            background: var(--accent);
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(247, 127, 0, 0.35);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            display: inline-flex;
            margin-bottom: 16px;
            font-size: 1.4rem;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand .logo span {
            color: rgba(255, 255, 255, 0.95);
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            opacity: 0.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 0.92rem;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-col ul li i {
            margin-right: 6px;
            color: var(--accent);
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.88rem;
            opacity: 0.65;
            line-height: 1.6;
        }
        .footer-bottom a {
            color: var(--accent-light);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-hero h1 {
                font-size: 2.2rem;
            }
            .article-body {
                padding: 36px 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
                border-top: 1px solid var(--border);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-menu a::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }

            .article-hero {
                min-height: 320px;
                padding: 100px 20px 40px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .hero-meta {
                gap: 12px;
                font-size: 0.85rem;
            }

            .article-body {
                padding: 28px 20px;
                border-radius: var(--radius);
            }
            .article-body p {
                font-size: 1rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .related-card .card-img {
                height: 180px;
            }

            .faq-item .faq-question {
                font-size: 0.95rem;
                padding: 14px 18px;
            }

            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section .btn-cta {
                padding: 14px 32px;
                font-size: 1rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-hero .hero-meta {
                flex-direction: column;
                gap: 6px;
            }
            .article-body {
                padding: 20px 16px;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }

        /* ===== Breadcrumb (internal) ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-light);
            padding: 16px 0 0;
            max-width: 800px;
            margin: 0 auto;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text);
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-light);
        }