/* roulang page: index */
:root {
            --primary: #1a6b6b;
            --primary-dark: #145555;
            --primary-light: #e6f3f3;
            --primary-ultra-light: #f4faf9;
            --accent: #c8822a;
            --accent-light: #fdf3e4;
            --bg: #f6f7f9;
            --surface: #ffffff;
            --surface-alt: #fafbfc;
            --text: #1a1a2e;
            --text-secondary: #4a4a5e;
            --text-muted: #7b7d8c;
            --text-weak: #9ca0af;
            --border: #e4e6eb;
            --border-light: #f0f1f5;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --shadow-xs: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 4px 18px rgba(0,0,0,0.07);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 14px 48px rgba(0,0,0,0.12);
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
        }

        *,
        *::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-stack);
            font-size: 16px;
            line-height: 1.65;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

        input {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--surface);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 0 0 auto;
            min-width: 120px;
        }
        .nav-left {
            justify-content: flex-start;
        }
        .nav-right {
            justify-content: flex-end;
        }

        .nav-brand {
            flex: 0 0 auto;
            text-align: center;
            padding: 0 16px;
        }
        .nav-brand a {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .nav-brand a:hover {
            color: var(--primary);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-ultra-light);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .hamburger:hover {
            background: var(--primary-ultra-light);
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 999;
            background: rgba(0,0,0,0.4);
            backdrop-filter: blur(4px);
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--header-height);
            right: 0;
            width: 280px;
            max-width: 85vw;
            bottom: 0;
            z-index: 1000;
            background: var(--surface);
            box-shadow: var(--shadow-xl);
            padding: 20px 24px;
            flex-direction: column;
            gap: 6px;
            overflow-y: auto;
            transform: translateX(100%);
            transition: transform var(--transition);
        }
        .mobile-nav-panel.open {
            transform: translateX(0);
        }
        .mobile-nav-panel .nav-link {
            display: flex;
            padding: 12px 16px;
            font-size: 1rem;
            border-radius: var(--radius);
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            background: linear-gradient(135deg, #1a3a3a 0%, #1a5c5c 40%, #1a6b6b 70%, #0f4444 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 90px 0 100px;
            text-align: center;
            color: #ffffff;
            overflow: hidden;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 30, 30, 0.55);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.25);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 24px;
            color: #e0f0f0;
        }
        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #ffffff;
        }
        .hero h1 span {
            color: #f0c060;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: #d0e4e4;
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 50px;
            letter-spacing: 0.02em;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: #f0c060;
            color: #1a3a3a;
            box-shadow: 0 4px 16px rgba(240,192,96,0.35);
        }
        .btn-primary:hover {
            background: #f5d080;
            box-shadow: 0 6px 22px rgba(240,192,96,0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255,255,255,0.5);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.1);
            border-color: #ffffff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 50px;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-accent:hover {
            background: #b37322;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-ghost:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--surface-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.02em;
            margin-bottom: 10px;
        }
        .section-header p {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 50px;
            letter-spacing: 0.05em;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        /* ========== KPI CARDS ========== */
        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .kpi-card {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .kpi-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }
        .kpi-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.01em;
            line-height: 1;
            margin-bottom: 8px;
        }
        .kpi-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ========== CARDS ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            background: var(--accent-light);
            padding: 3px 10px;
            border-radius: 50px;
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }
        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 14px;
        }
        .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .card-link:hover {
            gap: 8px;
        }

        /* ========== LIST ========== */
        .post-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .post-item {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .post-item:hover {
            box-shadow: var(--shadow);
            transform: translateX(3px);
            border-color: var(--primary-light);
        }
        .post-thumb {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .post-info {
            flex: 1;
            min-width: 0;
        }
        .post-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.35;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .post-meta {
            font-size: 0.82rem;
            color: var(--text-weak);
        }
        .post-arrow {
            flex-shrink: 0;
            color: var(--text-weak);
            font-size: 1.1rem;
            transition: transform var(--transition-fast);
        }
        .post-item:hover .post-arrow {
            transform: translateX(4px);
            color: var(--primary);
        }
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 2px dashed var(--border);
        }

        /* ========== FEATURE ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .feature-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .feature-icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius);
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
            color: var(--primary);
        }
        .feature-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text);
            user-select: none;
            transition: background var(--transition-fast);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            background: var(--primary-ultra-light);
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.3rem;
            font-weight: 400;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }
        .faq-item .faq-body {
            padding: 0 22px 20px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ========== CTA ========== */
        .cta-block {
            background: linear-gradient(135deg, #1a5c5c 0%, #0f3d3d 100%);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            text-align: center;
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(8, 28, 28, 0.5);
            z-index: 1;
        }
        .cta-block .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-block h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-block p {
            font-size: 1rem;
            color: #c8e0e0;
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #111827;
            color: #c5cdd8;
            padding: 48px 0 28px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand-name {
            font-size: 1.15rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
        }
        .footer-desc {
            font-size: 0.88rem;
            color: #9ca3af;
            line-height: 1.6;
            max-width: 280px;
        }
        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #e5e7eb;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            color: #9ca3af;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            border-top: 1px solid #1f2937;
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: #6b7280;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .nav-left,
            .nav-right {
                min-width: auto;
                gap: 2px;
            }
            .nav-link {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
        }

        @media (max-width: 768px) {
            .nav-left .nav-link,
            .nav-right .nav-link {
                display: none;
            }
            .nav-left,
            .nav-right {
                min-width: auto;
            }
            .hamburger {
                display: flex;
            }
            .mobile-nav-overlay.active {
                display: block;
            }
            .mobile-nav-panel.active {
                display: flex;
            }
            .mobile-nav-panel .nav-link {
                display: flex;
            }
            .hero {
                padding: 60px 0 70px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .kpi-number {
                font-size: 2rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .post-item {
                flex-wrap: wrap;
                gap: 12px;
            }
            .post-thumb {
                width: 56px;
                height: 56px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-block {
                padding: 36px 20px;
            }
            .cta-block h3 {
                font-size: 1.4rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .kpi-card {
                padding: 20px 14px;
            }
            .kpi-number {
                font-size: 1.7rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .nav-brand a {
                font-size: 1.05rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .card-img {
                height: 160px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0f3d5c;
            --primary-dark: #0b2b40;
            --accent: #10b981;
            --accent-dark: #059669;
            --surface: #ffffff;
            --surface-alt: #f8fafc;
            --border: #e2e8f0;
            --text: #1e293b;
            --text-muted: #64748b;
            --radius: 12px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
            --transition: 0.2s ease;
        }
        * { box-sizing: border-box; }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--surface-alt);
            color: var(--text);
            line-height: 1.6;
            margin: 0;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .container-narrow { max-width: 860px; }
        .btn {
            display: inline-block;
            padding: 10px 24px;
            border-radius: 8px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            font-size: 0.95rem;
        }
        .btn-primary {
            background: var(--primary);
            color: white;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: white;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }
        .btn-accent {
            background: var(--accent);
            color: white;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: white;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 8px 24px;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: white;
        }

        /* Header */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-brand a {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .nav-link {
            font-weight: 600;
            color: var(--text);
            position: relative;
            padding: 6px 0;
        }
        .nav-link:hover { color: var(--primary); }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* Article Banner */
        .article-banner {
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 80px 0 60px;
            position: relative;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,61,92,0.85) 0%, rgba(15,61,92,0.7) 100%);
        }
        .banner-content {
            position: relative;
            color: white;
        }
        .breadcrumb {
            display: flex;
            list-style: none;
            padding: 0;
            margin-bottom: 24px;
            font-size: 0.9rem;
        }
        .breadcrumb-item + .breadcrumb-item::before {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            padding: 0 10px;
            color: rgba(255,255,255,0.7);
        }
        .breadcrumb a {
            color: rgba(255,255,255,0.85);
        }
        .breadcrumb .active {
            color: white;
            font-weight: 500;
        }

        /* Article Main */
        .article-main {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            margin-top: -40px;
            margin-bottom: 60px;
            padding: 48px;
            position: relative;
            z-index: 5;
        }
        .article-header {
            margin-bottom: 36px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 28px;
        }
        .article-category {
            background: #e0f2f1;
            color: #00695c;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .article-meta {
            display: flex;
            gap: 24px;
            color: var(--text-muted);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 6px;
        }
        .article-body {
            font-size: 1.05rem;
            color: var(--text);
            line-height: 1.8;
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin-top: 32px;
            margin-bottom: 16px;
            color: var(--primary-dark);
        }
        .article-body h3 {
            font-size: 1.3rem;
            margin-top: 24px;
            margin-bottom: 12px;
        }
        .article-body p {
            margin-bottom: 1.2rem;
        }

        /* Related Posts */
        .related-section {
            margin: 60px 0;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 28px;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }
        .post-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .post-card img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .post-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-body h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .post-card-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
            flex: 1;
        }
        .post-card .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 12px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #0a2a3a 100%);
            border-radius: var(--radius);
            padding: 48px;
            text-align: center;
            color: white;
            margin: 50px 0;
        }
        .cta-section h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 60px 0 30px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand-name {
            font-size: 1.4rem;
            font-weight: 700;
            color: white;
            margin-bottom: 12px;
        }
        .footer-desc {
            opacity: 0.75;
            line-height: 1.7;
        }
        .footer-col h5 {
            color: white;
            font-weight: 600;
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: #94a3b8;
            font-size: 0.9rem;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .post-card-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .site-header .container { flex-wrap: wrap; height: auto; padding: 12px 20px; }
            .nav-left, .nav-right { gap: 16px; }
            .nav-right .hamburger { display: block; }
            .nav-right .nav-link { display: none; } /* Simplified mobile approach, actual logic would need JS */
            .article-main { padding: 28px; margin-top: -30px; }
            .article-title { font-size: 1.7rem; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .cta-section { padding: 32px 24px; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .article-meta { flex-direction: column; gap: 8px; }
        }

/* roulang page: category1 */
/* ==================== 设计变量 ==================== */
        :root {
            --color-primary: #2c6e6e;
            --color-primary-light: #3a8a8a;
            --color-primary-dark: #1e4f4f;
            --color-primary-bg: #e8f4f4;
            --color-accent: #c9a96e;
            --color-accent-light: #d9bc88;
            --color-accent-bg: #fdf8f0;
            --color-bg: #f7f9fa;
            --color-surface: #ffffff;
            --color-text: #1a1d22;
            --color-text-secondary: #5a5f66;
            --color-text-muted: #8b9098;
            --color-text-light: #b0b5bc;
            --color-border: #e2e5ea;
            --color-border-light: #eef0f3;
            --color-success: #27ae60;
            --color-warning: #f0a030;
            --color-danger: #e05050;
            --color-info: #3b7fbf;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
            --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', 'Monaco', monospace;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 32px;
            --spacing-2xl: 48px;
            --spacing-3xl: 64px;
            --spacing-4xl: 80px;
            --max-width: 1200px;
            --max-width-narrow: 900px;
            --header-height: 72px;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

        /* ==================== 基础重置 ==================== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

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

        /* ==================== Header / 导航 ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
            border-bottom-color: var(--color-border);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-lg);
            height: 100%;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex: 1;
            min-width: 0;
        }

        .nav-left {
            justify-content: flex-start;
        }

        .nav-right {
            justify-content: flex-end;
            gap: var(--spacing-md);
        }

        .nav-brand {
            flex-shrink: 0;
            text-align: center;
        }

        .nav-brand a {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--color-primary-dark);
            white-space: nowrap;
            transition: color var(--transition-fast);
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }

        .nav-brand a::before {
            content: '';
            display: inline-block;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            flex-shrink: 0;
            mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M21 6H3a1 1 0 0 0-1 1v10a1 1 0 0 0 1 1h18a1 1 0 0 0 1-1V7a1 1 0 0 0-1-1zm-9 4l4 3-4 3V10z'/%3E%3C/svg%3E");
            mask-size: 18px;
            mask-position: center;
            mask-repeat: no-repeat;
            -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M21 6H3a1 1 0 0 0-1 1v10a1 1 0 0 0 1 1h18a1 1 0 0 0 1-1V7a1 1 0 0 0-1-1zm-9 4l4 3-4 3V10z'/%3E%3C/svg%3E");
            -webkit-mask-size: 18px;
            -webkit-mask-position: center;
            -webkit-mask-repeat: no-repeat;
            background-color: var(--color-primary);
        }

        .nav-brand a:hover {
            color: var(--color-primary);
        }

        .nav-link {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            padding: var(--spacing-sm) var(--spacing-md);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

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

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-primary);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(44,110,110,0.25);
        }

        .nav-cta:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 4px 16px rgba(44,110,110,0.35);
            transform: translateY(-1px);
            color: #fff;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1px solid var(--color-border);
            cursor: pointer;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .hamburger:hover {
            background: var(--color-bg);
            border-color: var(--color-primary-light);
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-base);
            transform-origin: center;
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            flex-direction: column;
            padding: var(--spacing-xl);
            gap: var(--spacing-sm);
            overflow-y: auto;
            border-top: 1px solid var(--color-border-light);
        }

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

        .mobile-menu .nav-link {
            font-size: 1.1rem;
            padding: var(--spacing-md) var(--spacing-lg);
            border-radius: var(--radius-md);
            font-weight: 500;
        }

        .mobile-menu .nav-cta {
            margin-top: var(--spacing-md);
            justify-content: center;
            text-align: center;
            font-size: 1rem;
            padding: 12px 20px;
        }

        /* ==================== 页面主内容 ==================== */
        .page-main {
            flex: 1;
        }

        /* ==================== 分类 Hero Banner ==================== */
        .category-hero {
            position: relative;
            padding: var(--spacing-4xl) 0 var(--spacing-3xl);
            background: linear-gradient(170deg, #f0f6f6 0%, #e8f0f0 30%, #f7f9fa 70%, #ffffff 100%);
            overflow: hidden;
            border-bottom: 1px solid var(--color-border-light);
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(44,110,110,0.06) 0%, rgba(44,110,110,0.02) 50%, transparent 70%);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(201,169,110,0.08) 0%, rgba(201,169,110,0.02) 50%, transparent 70%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: var(--spacing-md);
        }

        .category-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            font-size: 0.875rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
            justify-content: center;
        }

        .breadcrumb a {
            color: var(--color-primary);
            font-weight: 500;
            transition: color var(--transition-fast);
        }

        .breadcrumb a:hover {
            color: var(--color-primary-dark);
            text-decoration: underline;
        }

        .breadcrumb .separator {
            color: var(--color-text-light);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 50px;
            letter-spacing: 0.03em;
            border: 1px solid rgba(44,110,110,0.15);
        }

        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--color-text);
            max-width: 700px;
            line-height: 1.2;
        }

        .category-hero h1 .highlight {
            color: var(--color-primary);
            position: relative;
        }

        .category-hero .hero-desc {
            font-size: 1.1rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }

        .category-hero .hero-stats-row {
            display: flex;
            gap: var(--spacing-xl);
            align-items: center;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: var(--spacing-md);
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            padding: var(--spacing-md) var(--spacing-lg);
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            min-width: 100px;
        }

        .hero-stat-item .stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary);
            font-family: var(--font-mono);
            letter-spacing: -0.02em;
        }

        .hero-stat-item .stat-label {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

        /* ==================== 板块通用样式 ==================== */
        .section {
            padding: var(--spacing-3xl) 0;
        }

        .section-alt {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-2xl);
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
            color: var(--color-text);
        }

        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-secondary);
            max-width: 500px;
            margin: 0 auto;
        }

        .section-header .section-divider {
            display: inline-block;
            width: 48px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-primary);
            margin-top: var(--spacing-sm);
        }

        /* ==================== 筛选标签栏 ==================== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            justify-content: center;
            margin-bottom: var(--spacing-xl);
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 50px;
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            color: var(--color-text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            user-select: none;
        }

        .filter-tag:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: var(--color-primary-bg);
        }

        .filter-tag.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(44,110,110,0.25);
        }

        /* ==================== 攻略文章卡片网格 ==================== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-xl);
        }

        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            transform: translateY(-3px);
        }

        .article-card .card-image-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #eef2f2;
        }

        .article-card .card-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .card-image-wrap img {
            transform: scale(1.05);
        }

        .article-card .card-image-wrap .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            background: var(--color-accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 50px;
            letter-spacing: 0.03em;
            z-index: 1;
            box-shadow: 0 2px 6px rgba(201,169,110,0.4);
        }

        .article-card .card-body {
            padding: var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            font-size: 0.8rem;
            color: var(--color-text-muted);
            flex-wrap: wrap;
        }

        .card-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .card-meta .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-text-light);
        }

        .article-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .card-title {
            color: var(--color-primary);
        }

        .article-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .article-card .card-footer-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            padding-top: var(--spacing-sm);
            border-top: 1px solid var(--color-border-light);
            margin-top: auto;
        }

        .card-footer-row .tag-list {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .tag-list .mini-tag {
            font-size: 0.72rem;
            padding: 3px 10px;
            border-radius: 50px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-weight: 500;
            white-space: nowrap;
            border: 1px solid rgba(44,110,110,0.1);
        }

        .card-footer-row .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-primary);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
        }

        .card-footer-row .read-more:hover {
            color: var(--color-primary-dark);
            gap: 8px;
        }

        .card-footer-row .read-more::after {
            content: '→';
            font-size: 1em;
            transition: transform var(--transition-fast);
        }

        /* ==================== KPI 数据条 ==================== */
        .kpi-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }

        .kpi-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            text-align: center;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-xs);
            position: relative;
            overflow: hidden;
        }

        .kpi-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--color-primary);
            border-radius: 0 0 var(--radius-sm) var(--radius-sm);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .kpi-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            transform: translateY(-2px);
        }

        .kpi-card:hover::before {
            opacity: 1;
        }

        .kpi-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: var(--color-primary-bg);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--spacing-md);
            font-size: 1.4rem;
            color: var(--color-primary);
        }

        .kpi-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-text);
            font-family: var(--font-mono);
            letter-spacing: -0.03em;
            line-height: 1;
        }

        .kpi-number .kpi-unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text-muted);
            margin-left: 2px;
        }

        .kpi-label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            margin-top: var(--spacing-xs);
            font-weight: 500;
        }

        /* ==================== 热门排行列表 ==================== */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: 800px;
            margin: 0 auto;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            padding: var(--spacing-md) var(--spacing-lg);
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
        }

        .ranking-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-sm);
            background: #fafcfc;
        }

        .ranking-position {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.95rem;
            flex-shrink: 0;
            background: var(--color-bg);
            color: var(--color-text-secondary);
        }

        .ranking-item.top-1 .ranking-position {
            background: linear-gradient(135deg, #f0c040, #e0a820);
            color: #fff;
            box-shadow: 0 3px 10px rgba(224,168,32,0.35);
        }
        .ranking-item.top-2 .ranking-position {
            background: linear-gradient(135deg, #bcc6d0, #9aa3ad);
            color: #fff;
            box-shadow: 0 3px 10px rgba(154,163,173,0.35);
        }
        .ranking-item.top-3 .ranking-position {
            background: linear-gradient(135deg, #d4a574, #c08a5c);
            color: #fff;
            box-shadow: 0 3px 10px rgba(192,138,92,0.35);
        }

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

        .ranking-title {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .ranking-meta {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: 2px;
        }

        .ranking-stat {
            font-weight: 700;
            color: var(--color-primary);
            font-size: 0.9rem;
            white-space: nowrap;
            flex-shrink: 0;
        }

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

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

        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-xs);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-lg);
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-md);
            cursor: pointer;
            transition: color var(--transition-fast);
            background: transparent;
            border: none;
        }

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

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            font-size: 1.1rem;
            color: var(--color-text-muted);
        }

        .faq-item.open .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 var(--spacing-lg);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-lg) var(--spacing-lg);
        }

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

        /* ==================== CTA ==================== */
        .cta-section {
            background: linear-gradient(160deg, var(--color-primary-dark) 0%, var(--color-primary) 40%, var(--color-primary-light) 100%);
            padding: var(--spacing-3xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            max-width: 550px;
            margin: 0 auto var(--spacing-xl);
            line-height: 1.7;
        }

        .cta-section .btn-group {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn-primary-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: #fff;
            color: var(--color-primary-dark);
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50px;
            transition: all var(--transition-fast);
            box-shadow: 0 4px 16px rgba(0,0,0,0.15);
            letter-spacing: 0.01em;
        }

        .btn-primary-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0,0,0,0.22);
            color: var(--color-primary-dark);
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 50px;
            border: 2px solid rgba(255,255,255,0.5);
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }

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

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: #1a1d22;
            color: #c5c8cc;
            padding: var(--spacing-3xl) 0 var(--spacing-lg);
            font-size: 0.9rem;
            margin-top: auto;
        }

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

        .footer-brand-name {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .footer-desc {
            color: #9ca3af;
            line-height: 1.7;
            font-size: 0.875rem;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .footer-col ul li a {
            color: #9ca3af;
            transition: color var(--transition-fast);
            font-size: 0.875rem;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-lg);
            color: #6b7280;
            font-size: 0.8rem;
        }

        /* ==================== 回到顶部按钮 ==================== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition-base);
            z-index: 900;
            cursor: pointer;
            border: none;
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            background: var(--color-primary-dark);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

        /* ==================== 分页 ==================== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-2xl);
        }

        .pagination .page-btn {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            color: var(--color-text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .pagination .page-btn:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary);
            background: var(--color-primary-bg);
        }

        .pagination .page-btn.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 700;
        }

        .pagination .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
            cursor: not-allowed;
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 1024px) {
            :root {
                --spacing-3xl: 48px;
                --spacing-4xl: 56px;
            }
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-lg);
            }
            .kpi-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-xl);
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .nav-right .nav-link {
                font-size: 0.85rem;
                padding: var(--spacing-sm) var(--spacing-sm);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --spacing-2xl: 32px;
                --spacing-3xl: 40px;
                --spacing-4xl: 48px;
            }
            .nav-right .nav-link {
                display: none;
            }
            .nav-right .nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .articles-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .kpi-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero .hero-desc {
                font-size: 0.95rem;
            }
            .hero-stats-row {
                gap: var(--spacing-md);
            }
            .hero-stat-item {
                padding: var(--spacing-sm) var(--spacing-md);
                min-width: 80px;
            }
            .hero-stat-item .stat-number {
                font-size: 1.3rem;
            }
            .ranking-item {
                flex-wrap: wrap;
                gap: var(--spacing-md);
                padding: var(--spacing-md);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .pagination .page-btn {
                width: 34px;
                height: 34px;
                font-size: 0.8rem;
            }
            .back-to-top {
                bottom: 20px;
                right: 16px;
                width: 38px;
                height: 38px;
            }
            .nav-brand a {
                font-size: 1.1rem;
            }
            .nav-brand a::before {
                width: 22px;
                height: 22px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-2xl: 24px;
                --spacing-3xl: 32px;
                --spacing-4xl: 36px;
            }
            .container {
                padding: 0 var(--spacing-md);
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-desc {
                font-size: 0.9rem;
            }
            .hero-stats-row {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .hero-stat-item {
                flex-direction: row;
                gap: var(--spacing-md);
                padding: var(--spacing-sm) var(--spacing-md);
            }
            .kpi-strip {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .kpi-card {
                padding: var(--spacing-md);
            }
            .kpi-number {
                font-size: 1.8rem;
            }
            .filter-bar {
                gap: 4px;
            }
            .filter-tag {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: var(--spacing-md);
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .btn-primary-white,
            .btn-outline-white {
                padding: 12px 24px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .btn-group {
                flex-direction: column;
                width: 100%;
            }
            .ranking-item {
                flex-wrap: wrap;
                gap: var(--spacing-sm);
            }
            .ranking-position {
                width: 30px;
                height: 30px;
                font-size: 0.8rem;
            }
        }