/* roulang page: index */
:root {
            --bg: #F6F9FE;
            --surface: #FFFFFF;
            --primary: #2563EB;
            --primary-600: #1E4FD8;
            --primary-100: #E3EBFB;
            --primary-50: #F0F5FE;
            --accent: #22D3EE;
            --accent-light: #E8FAFD;
            --accent-green: #A3E635;
            --text: #0F172A;
            --muted: #64748B;
            --line: #E1E9F5;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .04);
            --shadow-md: 0 8px 28px rgba(15, 23, 42, .06);
            --shadow-lg: 0 16px 36px rgba(15, 23, 42, .10);
            --shadow-xl: 0 24px 48px rgba(15, 23, 42, .14);
            --container: 1200px;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'Rajdhani', 'Chakra Petch', 'Inter', var(--font-cn);
            --transition: 200ms ease;
            --transition-slow: 350ms ease;
        }

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

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

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--primary-600);
        }

        ul, ol {
            list-style: none;
        }

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

        button {
            cursor: pointer;
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .95);
            border-bottom: 1px solid var(--line);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(15, 23, 42, .06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 24px;
        }

        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

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

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

        .logo {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 24px;
            letter-spacing: .5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

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

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-100);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(246, 249, 254, .98);
            z-index: 99;
            padding: 32px 28px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            transition: opacity var(--transition-slow), transform var(--transition-slow);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu .nav-link {
            display: block;
            font-size: 18px;
            padding: 14px 8px;
            border-bottom: 1px solid var(--line);
        }

        /* ============ Hero ============ */
        .hero {
            position: relative;
            padding: 72px 0 88px;
            background: var(--bg);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(37, 99, 235, .04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(37, 99, 235, .04) 1px, transparent 1px);
            background-size: 42px 42px;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-green));
            opacity: .6;
        }

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

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 56px;
            align-items: center;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 100px;
            margin-bottom: 18px;
            border: 1px solid var(--primary-100);
        }

        .hero-eyebrow .pulse {
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulse 1.6s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: .5; transform: scale(1.25); }
        }

        .hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -.5px;
            margin-bottom: 22px;
            color: var(--text);
        }

        .hero-sub {
            font-size: 16px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 30px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: 14px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: .2px;
            transition: all var(--transition);
            white-space: nowrap;
            min-height: 48px;
        }

        .btn:active {
            transform: translateY(1px);
        }

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

        .btn-primary:hover {
            background: var(--primary-600);
            color: #fff;
            box-shadow: 0 8px 20px rgba(37, 99, 235, .28);
        }

        .btn-secondary {
            background: var(--surface);
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-100);
            color: var(--primary-600);
        }

        .btn-outline-light {
            background: transparent;
            color: var(--text);
            border: 1px solid var(--line);
        }

        .btn-outline-light:hover {
            background: var(--primary-50);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Hero coupon wall */
        .hero-coupon-wrap {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--line);
            position: relative;
        }

        .hero-coupon-wrap::before {
            content: '';
            position: absolute;
            top: -6px;
            left: 24px;
            right: 24px;
            height: 12px;
            background: var(--primary);
            border-radius: 6px 6px 0 0;
            opacity: .15;
        }

        .coupon-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--muted);
            margin-bottom: 14px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .main-coupon {
            background: var(--bg);
            border: 2px dashed var(--primary);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            text-align: center;
            margin-bottom: 18px;
            transition: border-color var(--transition), transform var(--transition);
        }

        .main-coupon:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .coupon-value {
            font-family: var(--font-num);
            font-size: 52px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -1px;
        }

        .coupon-value sup {
            font-size: 24px;
            vertical-align: top;
            margin-right: 2px;
        }

        .coupon-value span {
            font-size: 18px;
            font-weight: 600;
            color: var(--muted);
            letter-spacing: 0;
            margin-left: 4px;
        }

        .coupon-title {
            font-weight: 600;
            margin-top: 6px;
            font-size: 15px;
        }

        .coupon-desc {
            font-size: 13px;
            color: var(--muted);
            margin-top: 4px;
        }

        .coupon-mini-row {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }

        .mini-coupon {
            background: var(--primary-50);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            border: 1px solid var(--primary-100);
            transition: all var(--transition);
            cursor: default;
        }

        .mini-coupon:hover {
            border-color: var(--accent);
            background: var(--accent-light);
        }

        .mini-coupon-value {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
        }

        .mini-coupon-label {
            font-size: 12px;
            color: var(--muted);
            margin-top: 2px;
        }

        .btn-coupon {
            width: 100%;
            margin-top: 18px;
            background: var(--accent-green);
            color: var(--text);
            font-weight: 700;
            font-size: 16px;
            padding: 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .btn-coupon:hover {
            background: #b9ef68;
            box-shadow: 0 8px 20px rgba(163, 230, 53, .3);
        }

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

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

        .section-header {
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-50);
            border: 1px solid var(--primary-100);
            padding: 4px 12px;
            border-radius: 100px;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -.3px;
            margin-bottom: 12px;
            color: var(--text);
        }

        .section-header p {
            font-size: 15px;
            color: var(--muted);
            max-width: 640px;
            line-height: 1.8;
        }

        .section-sub {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 700px;
        }

        /* ============ Case Cards ============ */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .case-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .case-card-img {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-100);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            overflow: hidden;
            flex-shrink: 0;
        }

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

        .case-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .case-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }

        .case-tag {
            font-size: 12px;
            background: var(--primary-50);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 100px;
            font-weight: 500;
        }

        .case-stat {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-green);
            margin-bottom: 8px;
        }

        .case-desc {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ============ Data Metrics ============ */
        .metrics-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .metric-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .metric-value {
            font-family: var(--font-num);
            font-size: 44px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -1px;
        }

        .metric-unit {
            font-size: 16px;
            font-weight: 600;
            color: var(--muted);
            margin-left: 2px;
        }

        .metric-label {
            font-size: 14px;
            color: var(--muted);
            margin-top: 8px;
        }

        .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            color: var(--accent-green);
            font-weight: 600;
            margin-top: 4px;
        }

        /* ============ Compare Before/After ============ */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .compare-col {
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--line);
        }

        .compare-col.before {
            background: var(--surface);
        }

        .compare-col.after {
            background: var(--primary-50);
            border-color: var(--primary);
            border-width: 1.5px;
        }

        .compare-col h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-col.before h3 {
            color: var(--muted);
        }

        .compare-col.after h3 {
            color: var(--primary);
        }

        .compare-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid var(--line);
            font-size: 14px;
        }

        .compare-row:last-child {
            border-bottom: none;
        }

        .compare-label {
            color: var(--muted);
        }

        .compare-value {
            font-weight: 600;
            font-family: var(--font-num);
            font-size: 16px;
        }

        .compare-col.before .compare-value {
            color: var(--danger);
        }

        .compare-col.after .compare-value {
            color: var(--primary);
        }

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

        .step-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: all var(--transition);
            counter-increment: step;
        }

        .step-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 36px;
            font-weight: 700;
            color: var(--primary-100);
            position: absolute;
            top: 16px;
            right: 20px;
            line-height: 1;
        }

        .step-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ============ News Items ============ */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .news-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .news-thumb {
            aspect-ratio: 16/10;
            background: var(--primary-50);
            overflow: hidden;
            position: relative;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .news-card:hover .news-thumb img {
            transform: scale(1.04);
        }

        .news-body {
            padding: 20px 22px 24px;
        }

        .news-date {
            font-size: 12px;
            color: var(--muted);
            margin-bottom: 8px;
            font-family: var(--font-num);
            letter-spacing: .5px;
        }

        .news-body h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .news-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            width: 100%;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-50);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: transform var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
            padding: 0 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* ============ CTA ============ */
        .cta-wrap {
            background: var(--primary-50);
            border-radius: var(--radius-lg);
            padding: 52px 44px;
            text-align: center;
            border: 1px solid var(--primary-100);
            position: relative;
            overflow: hidden;
        }

        .cta-wrap::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-green));
            opacity: .5;
        }

        .cta-wrap h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-wrap p {
            font-size: 15px;
            color: var(--muted);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
        }

        .cta-form input {
            flex: 1;
            padding: 13px 18px;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: var(--surface);
            font-size: 14px;
            transition: all var(--transition);
            min-height: 48px;
        }

        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        /* ============ Scenario Grid ============ */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: left;
        }

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

        .scenario-icon {
            font-size: 28px;
            margin-bottom: 12px;
        }

        .scenario-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .scenario-card p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ============ Product Screenshot ============ */
        .product-stage {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 44px;
            align-items: center;
        }

        .product-shot {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            border: 1px solid var(--line);
            aspect-ratio: 4/3;
            background: var(--primary-50);
            position: relative;
        }

        .product-shot img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .product-desc h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .product-desc p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .product-points {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .product-point {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text);
        }

        .product-point-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--accent-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* ============ Review Wall ============ */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .review-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .review-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .review-stars {
            color: var(--warning);
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }

        .review-text {
            font-size: 14px;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .review-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-100);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
            overflow: hidden;
        }

        .review-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .review-name {
            font-size: 13px;
            font-weight: 600;
        }

        .review-meta {
            font-size: 12px;
            color: var(--muted);
        }

        /* ============ Changelog ============ */
        .changelog-list {
            max-width: 720px;
            margin: 0 auto;
            position: relative;
        }

        .changelog-list::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--line);
        }

        .changelog-item {
            padding-left: 36px;
            position: relative;
            margin-bottom: 28px;
        }

        .changelog-item::before {
            content: '';
            position: absolute;
            left: 2px;
            top: 8px;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border-radius: 50%;
            border: 3px solid var(--primary-100);
        }

        .changelog-version {
            font-family: var(--font-num);
            font-weight: 700;
            color: var(--primary);
            font-size: 16px;
            margin-bottom: 4px;
        }

        .changelog-date {
            font-size: 12px;
            color: var(--muted);
            margin-bottom: 6px;
        }

        .changelog-text {
            font-size: 14px;
            color: var(--text);
            line-height: 1.7;
        }

        /* ============ Entry Matrix ============ */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .entry-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: block;
        }

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

        .entry-icon {
            font-size: 32px;
            margin-bottom: 10px;
        }

        .entry-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .entry-desc {
            font-size: 12px;
            color: var(--muted);
            margin-top: 4px;
        }

        /* ============ Brand Intro ============ */
        .brand-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .brand-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
            background: var(--primary-50);
        }

        .brand-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .brand-text h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .brand-text p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            font-family: var(--font-num);
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 14px;
            color: var(--text);
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--muted);
            transition: color var(--transition);
        }

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

        .footer-subscribe {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }

        .footer-subscribe input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: var(--bg);
            font-size: 13px;
            min-height: 44px;
            transition: all var(--transition);
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
        }

        .footer-subscribe button {
            padding: 10px 18px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            min-height: 44px;
            transition: background var(--transition);
        }

        .footer-subscribe button:hover {
            background: var(--primary-600);
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding: 18px 0;
            text-align: center;
            font-size: 12px;
            color: var(--muted);
        }

        .footer-bottom span {
            font-weight: 600;
            color: var(--text);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .product-stage {
                grid-template-columns: 1fr;
            }
            .brand-grid {
                grid-template-columns: 1fr;
            }
            .entry-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                gap: 12px;
                padding: 12px 0;
            }
            .nav-left, .nav-right {
                display: none;
            }
            .logo {
                font-size: 20px;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .hero {
                padding: 48px 0 56px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-sub {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .review-grid {
                grid-template-columns: 1fr;
            }
            .coupon-mini-row {
                grid-template-columns: 1fr;
            }
            .cta-wrap {
                padding: 32px 20px;
            }
            .cta-form {
                flex-direction: column;
            }
            .container {
                padding: 0 18px;
            }
            .entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .metrics-bar {
                grid-template-columns: 1fr;
            }
            .steps-flow {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 22px;
                letter-spacing: 0;
            }
            .coupon-value {
                font-size: 40px;
            }
            .section-header h2 {
                font-size: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #F6F9FE;
            --surface: #FFFFFF;
            --primary: #2563EB;
            --primary-600: #1E4FD8;
            --primary-100: #E3EBFB;
            --primary-50: #F0F5FE;
            --accent: #22D3EE;
            --accent-light: #E8FAFD;
            --accent-green: #A3E635;
            --text: #0F172A;
            --muted: #64748B;
            --line: #E1E9F5;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .04);
            --shadow-md: 0 8px 28px rgba(15, 23, 42, .06);
            --shadow-lg: 0 16px 36px rgba(15, 23, 42, .10);
            --shadow-xl: 0 24px 48px rgba(15, 23, 42, .14);
            --container: 1200px;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'Rajdhani', 'Chakra Petch', 'Inter', var(--font-cn);
            --transition: 200ms ease;
            --transition-slow: 350ms ease;
        }

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

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

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

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

        a:hover {
            color: var(--primary-600);
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            appearance: none;
            -webkit-appearance: none;
            border: none;
            outline: none;
            background: none;
            margin: 0;
            padding: 0;
        }

        button {
            cursor: pointer;
        }

        ul, ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6, p {
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .95);
            border-bottom: 1px solid var(--line);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(15, 23, 42, .06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 24px;
        }

        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

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

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

        .logo {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 24px;
            letter-spacing: .5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

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

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-100);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(246, 249, 254, .98);
            z-index: 99;
            padding: 32px 28px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            transition: opacity var(--transition-slow), transform var(--transition-slow);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu .nav-link {
            display: block;
            font-size: 16px;
            padding: 14px 8px;
            border-bottom: 1px solid var(--line);
            text-align: center;
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding: 28px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color var(--transition);
        }

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

        .breadcrumb .separator {
            color: var(--muted);
            font-size: 12px;
            user-select: none;
        }

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

        /* ============ Page Header ============ */
        .page-header-section {
            padding: 24px 0 14px;
        }

        .page-header-inner {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }

        .page-header-text {
            max-width: 720px;
        }

        .page-header-text h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }

        .page-header-text .subtitle {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
            max-width: 620px;
        }

        .result-count {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 22px;
            color: var(--primary);
            background: var(--primary-50);
            border: 1px solid var(--primary-100);
            border-radius: var(--radius-md);
            padding: 10px 20px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .result-count .count-number {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary-600);
            line-height: 1;
        }

        /* ============ Filter Toolbar ============ */
        .filter-toolbar-section {
            padding: 16px 0 8px;
        }

        .filter-toolbar {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 13px;
            color: var(--muted);
            font-weight: 500;
            white-space: nowrap;
        }

        .filter-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text);
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 24px;
            padding: 7px 16px;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .filter-btn:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-50);
        }

        .filter-btn.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
        }

        .sort-control {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sort-select {
            font-size: 13px;
            color: var(--text);
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 10px;
            padding: 8px 14px;
            min-width: 130px;
            cursor: pointer;
            transition: border-color var(--transition);
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 32px;
        }

        .sort-select:focus {
            border-color: var(--primary);
        }

        /* ============ Plan List Section ============ */
        .plan-list-section {
            padding: 32px 0 60px;
        }

        .plan-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .plan-row-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            gap: 28px;
            flex-wrap: wrap;
            transition: all var(--transition-slow);
            position: relative;
            overflow: hidden;
        }

        .plan-row-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .plan-row-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .plan-row-card:hover::before {
            opacity: 1;
        }

        .plan-row-card.highlight-card::before {
            opacity: 1;
            background: var(--accent);
        }

        .plan-row-card.highlight-card {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
        }

        .plan-main-info {
            flex: 1 1 260px;
            min-width: 220px;
        }

        .plan-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .plan-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-50);
            border: 1px solid var(--primary-100);
            border-radius: 20px;
            padding: 3px 10px;
            white-space: nowrap;
        }

        .plan-tag.hot {
            color: var(--danger);
            background: #FEF2F2;
            border-color: #FECACA;
        }

        .plan-tag.accent-tag {
            color: #0D9488;
            background: #F0FDFA;
            border-color: #99F6E4;
        }

        .plan-desc {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
            margin-bottom: 8px;
        }

        .plan-game-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .game-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--muted);
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 3px 12px;
        }

        .plan-stats {
            flex: 1 1 auto;
            display: flex;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .stat-item {
            text-align: center;
            min-width: 80px;
        }

        .stat-value {
            font-family: var(--font-num);
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.2;
        }

        .stat-value.positive {
            color: var(--primary-600);
        }

        .stat-value.accent-num {
            color: var(--accent);
        }

        .stat-label {
            font-size: 12px;
            color: var(--muted);
            margin-top: 2px;
        }

        .plan-price-block {
            flex-shrink: 0;
            text-align: right;
            min-width: 130px;
        }

        .price-amount {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }

        .price-unit {
            font-size: 13px;
            color: var(--muted);
            font-weight: 400;
        }

        .plan-cta-btn {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-sm);
            padding: 10px 22px;
            transition: all var(--transition);
            margin-top: 8px;
            white-space: nowrap;
        }

        .plan-cta-btn:hover {
            background: var(--primary-600);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

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

        /* ============ Tags / Weekly Ranking ============ */
        .ranking-section {
            padding: 50px 0 60px;
            background: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .ranking-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            align-items: start;
        }

        .ranking-block h2,
        .tags-block h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: -0.3px;
        }

        .hot-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hot-tag {
            display: inline-block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 24px;
            padding: 7px 18px;
            transition: all var(--transition);
        }

        .hot-tag:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-50);
            transform: translateY(-1px);
        }

        .hot-tag.ranked {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-50);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            transition: all var(--transition);
        }

        .rank-item:hover {
            border-color: var(--primary);
            background: var(--primary-50);
        }

        .rank-number {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            width: 32px;
            text-align: center;
            flex-shrink: 0;
        }

        .rank-number.top1 {
            color: var(--warning);
        }

        .rank-number.top2 {
            color: var(--primary-600);
        }

        .rank-number.top3 {
            color: var(--accent);
        }

        .rank-info {
            flex: 1;
        }

        .rank-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .rank-meta {
            font-size: 12px;
            color: var(--muted);
        }

        .rank-change {
            font-family: var(--font-num);
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            flex-shrink: 0;
        }

        .rank-change.down {
            color: var(--danger);
        }

        .cover-thumb {
            width: 72px;
            height: 72px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary-50);
            border: 1px solid var(--line);
        }

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

        /* ============ Method / Principle Section ============ */
        .method-section {
            padding: 64px 0;
        }

        .method-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 32px 36px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
        }

        .method-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .method-text p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .method-steps {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .method-step {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 14px 18px;
        }

        .step-num {
            width: 28px;
            height: 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            font-family: var(--font-num);
            flex-shrink: 0;
        }

        .step-content h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .step-content p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ============ FAQ Section ============ */
        .faq-section {
            padding: 56px 0 64px;
            background: var(--surface);
            border-top: 1px solid var(--line);
        }

        .faq-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 28px;
            text-align: center;
        }

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

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

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

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            padding: 18px 22px;
            cursor: pointer;
            list-style: none;
            position: relative;
            transition: color var(--transition);
        }

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

        .faq-item summary::after {
            content: '+';
            font-size: 20px;
            font-weight: 400;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item[open] {
            border-color: var(--primary);
            background: var(--primary-50);
        }

        .faq-answer {
            padding: 2px 22px 20px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
        }

        /* ============ Changelog Section ============ */
        .changelog-section {
            padding: 50px 0 20px;
        }

        .changelog-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 22px 28px;
            max-width: 700px;
        }

        .changelog-card h2 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .changelog-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .changelog-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
        }

        .changelog-dot {
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            margin-top: 8px;
            flex-shrink: 0;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding: 56px 0 72px;
        }

        .cta-panel {
            background: var(--primary-50);
            border: 1px solid var(--primary-100);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-sm);
        }

        .cta-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .cta-text p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            max-width: 480px;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-sm);
            padding: 12px 26px;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--primary-600);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

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

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

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            background: var(--surface);
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: var(--primary-100);
            color: var(--primary-600);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

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

        /* ============ Footer ============ */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 48px 0 0;
            margin-top: 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 36px;
            padding-bottom: 32px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            font-family: var(--font-num);
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            font-size: 13px;
            color: var(--muted);
            transition: color var(--transition);
        }

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

        .footer-subscribe {
            display: flex;
            gap: 8px;
            margin-top: 10px;
        }

        .footer-subscribe input {
            flex: 1;
            font-size: 13px;
            color: var(--text);
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: 10px;
            padding: 10px 14px;
            min-width: 0;
            transition: border-color var(--transition);
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
        }

        .footer-subscribe button {
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: 10px;
            padding: 10px 16px;
            transition: background var(--transition);
            white-space: nowrap;
        }

        .footer-subscribe button:hover {
            background: var(--primary-600);
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding: 16px 0;
            text-align: center;
            font-size: 13px;
            color: var(--muted);
        }

        .footer-bottom span {
            color: var(--primary);
            font-weight: 600;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .nav-left, .nav-right {
                gap: 18px;
            }
            .plan-row-card {
                padding: 20px 22px;
                gap: 20px;
            }
            .plan-stats {
                gap: 18px;
            }
            .stat-value {
                font-size: 22px;
            }
            .ranking-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .method-card {
                grid-template-columns: 1fr;
                padding: 24px 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-header-text h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                min-height: 60px;
                gap: 14px;
            }
            .nav-left, .nav-right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .logo {
                font-size: 20px;
            }
            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 14px;
                border-radius: 7px;
            }
            .container {
                padding: 0 18px;
            }
            .page-header-text h1 {
                font-size: 28px;
            }
            .page-header-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .result-count {
                align-self: flex-start;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 16px;
            }
            .filter-group {
                width: 100%;
            }
            .sort-control {
                width: 100%;
            }
            .sort-select {
                width: 100%;
                min-width: 0;
            }
            .plan-row-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 18px 20px;
            }
            .plan-main-info {
                min-width: 0;
            }
            .plan-stats {
                width: 100%;
                justify-content: flex-start;
                gap: 20px;
            }
            .plan-price-block {
                width: 100%;
                text-align: left;
                display: flex;
                align-items: center;
                justify-content: space-between;
                flex-wrap: wrap;
                gap: 12px;
            }
            .ranking-grid {
                grid-template-columns: 1fr;
            }
            .method-card {
                grid-template-columns: 1fr;
                padding: 20px 18px;
            }
            .faq-item summary {
                font-size: 14px;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 2px 18px 16px;
                font-size: 13px;
            }
            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 22px;
            }
            .cta-actions {
                width: 100%;
                flex-direction: column;
            }
            .btn-primary, .btn-secondary {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-subscribe {
                flex-direction: column;
            }
            .footer-subscribe button {
                width: 100%;
                text-align: center;
            }
            .stat-value {
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .page-header-text h1 {
                font-size: 24px;
            }
            .page-header-text .subtitle {
                font-size: 14px;
            }
            .result-count {
                font-size: 18px;
                padding: 8px 14px;
            }
            .result-count .count-number {
                font-size: 24px;
            }
            .plan-name {
                font-size: 18px;
            }
            .stat-item {
                min-width: 60px;
            }
            .stat-value {
                font-size: 18px;
            }
            .plan-cta-btn {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .cta-panel {
                padding: 22px 16px;
            }
            .cta-text h2 {
                font-size: 20px;
            }
            .breadcrumb {
                font-size: 12px;
            }
            .hot-tag {
                font-size: 12px;
                padding: 5px 12px;
            }
            .rank-item {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 10px;
            }
            .cover-thumb {
                width: 56px;
                height: 56px;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #F6F9FE;
            --surface: #FFFFFF;
            --primary: #2563EB;
            --primary-600: #1E4FD8;
            --primary-100: #E3EBFB;
            --primary-50: #F0F5FE;
            --accent: #22D3EE;
            --accent-light: #E8FAFD;
            --accent-green: #A3E635;
            --text: #0F172A;
            --muted: #64748B;
            --line: #E1E9F5;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .04);
            --shadow-md: 0 8px 28px rgba(15, 23, 42, .06);
            --shadow-lg: 0 16px 36px rgba(15, 23, 42, .10);
            --shadow-xl: 0 24px 48px rgba(15, 23, 42, .14);
            --container: 1200px;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'Rajdhani', 'Chakra Petch', 'Inter', var(--font-cn);
            --transition: 200ms ease;
            --transition-slow: 350ms ease;
        }

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

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

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            min-height: 100vh;
        }

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

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

        a:hover {
            color: var(--primary-600);
        }

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .95);
            border-bottom: 1px solid var(--line);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(15, 23, 42, .06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 24px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

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

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

        .logo {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 24px;
            letter-spacing: .5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

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

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-100);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(246, 249, 254, .98);
            z-index: 99;
            padding: 32px 28px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            transition: opacity var(--transition-slow), transform var(--transition-slow);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu .nav-link {
            display: block;
            font-size: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--line);
            text-align: center;
        }

        .mobile-menu .nav-link::after {
            display: none;
        }

        .mobile-menu .nav-link.active {
            color: var(--primary);
            background: var(--primary-50);
            border-radius: 8px;
            padding: 14px 16px;
            border-bottom: none;
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-bar {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 12px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color var(--transition);
        }

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

        .breadcrumb .separator {
            color: var(--line);
            font-size: 14px;
        }

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

        /* ============ Category Page Header ============ */
        .category-header {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 48px 0 40px;
        }

        .category-header .container {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 24px;
            align-items: end;
        }

        .category-header-text h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .category-header-text h1 .hl {
            color: var(--primary);
        }

        .category-header-text p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 12px;
        }

        .result-count {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-50);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
        }

        .result-count .num {
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 16px;
        }

        .header-stat-chips {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .chip {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: 10px;
            padding: 10px 16px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            min-width: 84px;
        }

        .chip strong {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
        }

        .chip em {
            font-style: normal;
            font-size: 12px;
            color: var(--muted);
        }

        /* ============ Filter Toolbar ============ */
        .filter-toolbar {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 16px 0;
        }

        .filter-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-group-label {
            font-size: 13px;
            color: var(--muted);
            white-space: nowrap;
        }

        .filter-btn {
            padding: 8px 16px;
            border-radius: 8px;
            background: var(--primary-50);
            border: 1px solid transparent;
            color: var(--text);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition);
            white-space: nowrap;
            min-height: 36px;
        }

        .filter-btn:hover {
            background: var(--primary-100);
            border-color: var(--primary);
            color: var(--primary);
        }

        .filter-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .sort-wrapper {
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sort-select {
            padding: 8px 32px 8px 14px;
            border: 1px solid var(--line);
            border-radius: 8px;
            background: var(--surface);
            color: var(--text);
            font-size: 13px;
            cursor: pointer;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2364748B' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            min-height: 40px;
        }

        .sort-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        /* ============ Product Grid Section ============ */
        .product-grid-section {
            padding: 48px 0 72px;
            background: var(--bg);
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .product-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }

        .product-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-100);
        }

        .product-card-image {
            position: relative;
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--primary-50);
        }

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

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

        .product-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: .3px;
        }

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

        .product-badge.warning {
            background: var(--warning);
            color: #fff;
        }

        .product-card-body {
            padding: 20px 20px 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .product-card-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 12px;
        }

        .product-name {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }

        .product-price {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
        }

        .product-price .unit {
            font-size: 13px;
            font-weight: 400;
            color: var(--muted);
            font-family: var(--font-cn);
        }

        .product-specs {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .spec-tag {
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 6px;
            background: var(--primary-50);
            color: var(--primary);
            font-weight: 500;
            white-space: nowrap;
        }

        .spec-tag.alt {
            background: var(--accent-light);
            color: var(--text);
        }

        .product-desc {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
            flex: 1;
        }

        .product-card-footer {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 4px;
        }

        .btn-product {
            padding: 10px 20px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            transition: all var(--transition);
            flex: 1;
            text-align: center;
        }

        .btn-product:hover {
            background: var(--primary-600);
            box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
        }

        .btn-outline-product {
            padding: 10px 16px;
            border-radius: 10px;
            background: var(--surface);
            border: 1px solid var(--line);
            color: var(--text);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-outline-product:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-50);
        }

        /* ============ Comparison Table Section ============ */
        .comparison-section {
            padding: 56px 0;
            background: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
        }

        .section-head .sub {
            font-size: 14px;
            color: var(--muted);
            max-width: 480px;
        }

        .comparison-table-wrap {
            overflow-x: auto;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--surface);
            box-shadow: var(--shadow-sm);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 720px;
            font-size: 14px;
        }

        .comparison-table th {
            background: var(--primary-50);
            color: var(--text);
            font-weight: 600;
            padding: 14px 18px;
            text-align: left;
            border-bottom: 1px solid var(--line);
            white-space: nowrap;
        }

        .comparison-table th:first-child {
            border-top-left-radius: var(--radius-md);
        }

        .comparison-table th:last-child {
            border-top-right-radius: var(--radius-md);
        }

        .comparison-table td {
            padding: 14px 18px;
            border-bottom: 1px solid var(--line);
            color: var(--muted);
            vertical-align: middle;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table tr:hover td {
            background: var(--primary-50);
        }

        .comparison-table td:first-child {
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
        }

        .comparison-table .highlight {
            color: var(--primary);
            font-weight: 600;
        }

        /* ============ Editor Picks ============ */
        .editor-picks-section {
            padding: 56px 0;
            background: var(--bg);
        }

        .picks-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .pick-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .pick-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-100);
            transform: translateY(-2px);
        }

        .pick-image {
            width: 100px;
            height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary-50);
        }

        .pick-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .pick-content {
            flex: 1;
        }

        .pick-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            background: var(--accent-light);
            color: var(--text);
            padding: 3px 10px;
            border-radius: 20px;
            margin-bottom: 8px;
            letter-spacing: .3px;
        }

        .pick-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .pick-content p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .pick-meta {
            font-size: 12px;
            color: var(--primary);
            font-weight: 500;
        }

        /* ============ Buying Guide ============ */
        .buying-guide-section {
            padding: 56px 0;
            background: var(--surface);
            border-top: 1px solid var(--line);
        }

        .guide-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .guide-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .guide-text p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .guide-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text);
            line-height: 1.6;
        }

        .guide-list li::before {
            content: '▸';
            color: var(--primary);
            font-weight: 700;
            flex-shrink: 0;
        }

        .guide-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 16 / 10;
        }

        .guide-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding: 56px 0;
            background: var(--surface);
            border-top: 1px solid var(--line);
        }

        .cta-box {
            background: var(--primary-50);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            border: 1px solid var(--primary-100);
        }

        .cta-box-text h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .cta-box-text p {
            font-size: 14px;
            color: var(--muted);
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            padding: 12px 28px;
            border-radius: 12px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            white-space: nowrap;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn-primary:hover {
            background: var(--primary-600);
            box-shadow: 0 4px 14px rgba(37, 99, 235, .25);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        .btn-secondary {
            padding: 12px 24px;
            border-radius: 12px;
            background: var(--surface);
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            white-space: nowrap;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn-secondary:hover {
            background: var(--primary-100);
            border-color: var(--primary-600);
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand h3 {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--muted);
            transition: color var(--transition);
        }

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

        .footer-subscribe {
            display: flex;
            gap: 8px;
            margin-top: 10px;
        }

        .footer-subscribe input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid var(--line);
            border-radius: 8px;
            font-size: 13px;
            color: var(--text);
            background: var(--bg);
            min-width: 0;
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
        }

        .footer-subscribe button {
            padding: 10px 18px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            transition: background var(--transition);
            white-space: nowrap;
        }

        .footer-subscribe button:hover {
            background: var(--primary-600);
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: var(--muted);
        }

        .footer-bottom span {
            color: var(--text);
            font-weight: 500;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .nav-left,
            .nav-right {
                gap: 16px;
            }

            .logo {
                font-size: 20px;
            }

            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 14px;
            }

            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }

            .category-header-text h1 {
                font-size: 30px;
            }

            .guide-layout {
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                min-height: 58px;
                gap: 12px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .logo {
                font-size: 18px;
            }

            .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 13px;
            }

            .mobile-menu {
                display: flex;
            }

            .category-header .container {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .category-header-text h1 {
                font-size: 26px;
            }

            .category-header {
                padding: 36px 0 28px;
            }

            .header-stat-chips {
                gap: 8px;
            }

            .chip {
                padding: 8px 12px;
                min-width: 64px;
            }

            .chip strong {
                font-size: 16px;
            }

            .filter-inner {
                gap: 12px;
            }

            .sort-wrapper {
                margin-left: 0;
                width: 100%;
            }

            .sort-select {
                flex: 1;
            }

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

            .product-card-image {
                aspect-ratio: 16 / 10;
            }

            .product-grid-section {
                padding: 32px 0 48px;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .comparison-section {
                padding: 40px 0;
            }

            .editor-picks-section {
                padding: 40px 0;
            }

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

            .pick-card {
                padding: 18px;
                gap: 14px;
            }

            .pick-image {
                width: 72px;
                height: 72px;
            }

            .buying-guide-section {
                padding: 40px 0;
            }

            .guide-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .guide-text h2 {
                font-size: 20px;
            }

            .cta-section {
                padding: 40px 0;
            }

            .cta-box {
                padding: 28px 20px;
                flex-direction: column;
                text-align: center;
                gap: 20px;
            }

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

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

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

            .footer-subscribe {
                flex-direction: column;
            }

            .footer-subscribe button {
                width: 100%;
                min-height: 44px;
            }

            .comparison-table {
                min-width: 560px;
                font-size: 12px;
            }

            .comparison-table th,
            .comparison-table td {
                padding: 10px 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .category-header-text h1 {
                font-size: 22px;
            }

            .category-header-text p {
                font-size: 13px;
            }

            .product-name {
                font-size: 14px;
            }

            .product-price {
                font-size: 18px;
            }

            .btn-product {
                font-size: 12px;
                padding: 8px 14px;
                min-height: 40px;
            }

            .btn-outline-product {
                font-size: 12px;
                padding: 8px 10px;
                min-height: 40px;
            }

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

            .pick-image {
                width: 100%;
                height: 140px;
            }

            .cta-box-text h2 {
                font-size: 18px;
            }

            .btn-primary,
            .btn-secondary {
                font-size: 13px;
                padding: 10px 18px;
                width: 100%;
            }

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

        /* Focus accessible styles */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

/* roulang page: category3 */
:root {
            --bg: #F6F9FE;
            --surface: #FFFFFF;
            --primary: #2563EB;
            --primary-600: #1E4FD8;
            --primary-100: #E3EBFB;
            --primary-50: #F0F5FE;
            --accent: #22D3EE;
            --accent-light: #E8FAFD;
            --accent-green: #A3E635;
            --text: #0F172A;
            --muted: #64748B;
            --line: #E1E9F5;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .04);
            --shadow-md: 0 8px 28px rgba(15, 23, 42, .06);
            --shadow-lg: 0 16px 36px rgba(15, 23, 42, .10);
            --shadow-xl: 0 24px 48px rgba(15, 23, 42, .14);
            --container: 1200px;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'Rajdhani', 'Chakra Petch', 'Inter', var(--font-cn);
            --transition: 200ms ease;
            --transition-slow: 350ms ease;
        }

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

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--primary-600);
        }

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

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .95);
            border-bottom: 1px solid var(--line);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(15, 23, 42, .06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 24px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

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

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

        .logo {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 24px;
            letter-spacing: .5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

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

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }

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

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            width: 100%;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-100);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(246, 249, 254, .98);
            z-index: 99;
            padding: 32px 28px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            transition: opacity var(--transition-slow), transform var(--transition-slow);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
        }

        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-menu .nav-link {
            display: block;
            font-size: 16px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            background: var(--surface);
            border: 1px solid var(--line);
            transition: all var(--transition);
        }

        .mobile-menu .nav-link:hover {
            background: var(--primary-50);
            border-color: var(--primary-100);
        }

        .mobile-menu .nav-link.active {
            background: var(--primary-50);
            border-color: var(--primary-100);
            color: var(--primary);
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding: 28px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li+li::before {
            content: '/';
            color: var(--line);
            font-size: 13px;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color var(--transition);
        }

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

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

        /* ============ Page Header ============ */
        .page-header {
            padding: 32px 0 36px;
        }

        .page-header-inner {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .page-header-text {
            flex: 1;
            min-width: 280px;
        }

        .page-header h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin: 0 0 12px;
            font-family: var(--font-num);
            letter-spacing: 1px;
        }

        .page-header h1 .highlight {
            color: var(--primary);
        }

        .page-header-desc {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
            max-width: 680px;
            margin: 0 0 16px;
        }

        .result-count {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-50);
            color: var(--primary-600);
            font-size: 13px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 999px;
            border: 1px solid var(--primary-100);
        }

        .result-count .dot {
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .5;
                transform: scale(1.4);
            }
        }

        .page-header-visual {
            flex-shrink: 0;
            width: 280px;
            height: 180px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--line);
        }

        .page-header-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ============ Stats Cards ============ */
        .stats-section {
            padding: 40px 0 20px;
        }

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

        .stat-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-100);
            transform: translateY(-2px);
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }

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

        .stat-card .stat-label {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 8px;
            font-weight: 500;
        }

        .stat-card .stat-value {
            font-family: var(--font-num);
            font-size: 40px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.2;
            letter-spacing: 1px;
        }

        .stat-card .stat-value .unit {
            font-size: 18px;
            color: var(--muted);
            font-weight: 500;
            margin-left: 4px;
        }

        .stat-card .stat-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            margin-top: 8px;
            padding: 4px 10px;
            border-radius: 999px;
        }

        .stat-trend.up {
            color: #059669;
            background: #ECFDF5;
        }

        .stat-trend.down {
            color: var(--danger);
            background: #FEF2F2;
        }

        .stat-trend.neutral {
            color: var(--muted);
            background: var(--primary-50);
        }

        /* ============ Timeline Section ============ */
        .timeline-section {
            padding: 60px 0;
        }

        .section-heading {
            margin-bottom: 32px;
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            font-family: var(--font-num);
            letter-spacing: .5px;
        }

        .section-heading h2 .highlight {
            color: var(--primary);
        }

        .section-heading p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
            max-width: 640px;
        }

        .timeline-container {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-sm);
        }

        .timeline-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--line);
            transition: background var(--transition);
        }

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

        .timeline-item:hover {
            background: var(--primary-50);
            border-radius: 8px;
            padding-left: 12px;
            padding-right: 12px;
        }

        .timeline-time {
            flex-shrink: 0;
            width: 90px;
            text-align: center;
        }

        .timeline-time .date {
            font-family: var(--font-num);
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: .5px;
        }

        .timeline-time .time {
            font-size: 13px;
            color: var(--muted);
        }

        .timeline-content {
            flex: 1;
            min-width: 0;
        }

        .timeline-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 4px;
        }

        .timeline-content .matchup {
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 8px;
        }

        .timeline-content .event-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--primary-50);
            color: var(--primary-600);
            border: 1px solid var(--primary-100);
        }

        .tag.accent-tag {
            background: var(--accent-light);
            color: #0E7490;
            border-color: #A5F3FC;
        }

        .tag.warning-tag {
            background: #FFFBEB;
            color: #B45309;
            border-color: #FDE68A;
        }

        /* ============ Rankings Section ============ */
        .rankings-section {
            padding: 40px 0 60px;
        }

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

        .ranking-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .ranking-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-100);
        }

        .ranking-card-header {
            padding: 20px 24px;
            background: var(--primary-50);
            border-bottom: 1px solid var(--line);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .ranking-card-header h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin: 0;
        }

        .ranking-card-header .badge {
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
        }

        .ranking-list {
            padding: 0;
            margin: 0;
            list-style: none;
        }

        .ranking-list li {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 24px;
            border-bottom: 1px solid var(--line);
            transition: background var(--transition);
        }

        .ranking-list li:last-child {
            border-bottom: none;
        }

        .ranking-list li:hover {
            background: var(--primary-50);
        }

        .rank-number {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--muted);
            width: 36px;
            text-align: center;
            flex-shrink: 0;
        }

        .rank-number.top1 {
            color: #F59E0B;
            font-size: 24px;
        }

        .rank-number.top2 {
            color: #94A3B8;
            font-size: 22px;
        }

        .rank-number.top3 {
            color: #B45309;
            font-size: 21px;
        }

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

        .rank-team-info .team-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .rank-team-info .team-record {
            font-size: 12px;
            color: var(--muted);
        }

        .rank-score {
            font-family: var(--font-num);
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
        }

        /* ============ Recent Events ============ */
        .recent-events-section {
            padding: 40px 0;
        }

        .events-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .event-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .event-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-100);
            transform: translateY(-4px);
        }

        .event-card-image {
            width: 100%;
            height: 160px;
            overflow: hidden;
            position: relative;
        }

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

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

        .event-card-image .overlay-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid var(--line);
        }

        .event-card-body {
            padding: 20px;
        }

        .event-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 8px;
        }

        .event-card-body .event-meta {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 12px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .event-card-body .event-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .event-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--line);
        }

        .event-card-footer .status {
            font-size: 12px;
            font-weight: 500;
            color: #059669;
        }

        .event-card-footer .status.upcoming {
            color: var(--warning);
        }

        .event-card-footer .link-text {
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition);
        }

        .event-card-footer .link-text:hover {
            gap: 8px;
        }

        /* ============ Data Source Section ============ */
        .data-source-section {
            padding: 60px 0;
        }

        .data-source-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .data-source-text h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
            font-family: var(--font-num);
            letter-spacing: .5px;
        }

        .data-source-text p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            margin: 0 0 12px;
        }

        .data-source-text .source-list {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
        }

        .data-source-text .source-list li {
            font-size: 13px;
            color: var(--text);
            padding: 8px 0;
            border-bottom: 1px solid var(--line);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .data-source-text .source-list li:last-child {
            border-bottom: none;
        }

        .data-source-text .source-list li::before {
            content: '●';
            color: var(--accent);
            font-size: 8px;
        }

        .data-source-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--line);
        }

        .data-source-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 200px;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding: 40px 0 80px;
        }

        .cta-card {
            background: var(--primary-50);
            border: 1px solid var(--primary-100);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 12px;
            font-family: var(--font-num);
            letter-spacing: .5px;
        }

        .cta-card h2 .highlight {
            color: var(--primary);
        }

        .cta-card p {
            font-size: 15px;
            color: var(--muted);
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.75;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
        }

        .cta-form input {
            flex: 1;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
            min-height: 48px;
        }

        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
        }

        .cta-form input::placeholder {
            color: #94A3B8;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            white-space: nowrap;
            min-height: 48px;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-600);
            border-color: var(--primary-600);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }

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

        .btn-secondary {
            background: var(--surface);
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-100);
            border-color: var(--primary-600);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: translateY(1px);
        }

        .btn-secondary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            min-height: 36px;
            border-radius: 10px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand h3 {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
            margin: 0;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 12px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            font-size: 13px;
            color: var(--muted);
            transition: color var(--transition);
        }

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

        .footer-subscribe {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }

        .footer-subscribe input {
            flex: 1;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 13px;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
            min-height: 40px;
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .1);
            outline: none;
        }

        .footer-subscribe button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 16px;
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: background var(--transition);
            min-height: 40px;
            white-space: nowrap;
        }

        .footer-subscribe button:hover {
            background: var(--primary-600);
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 16px;
            text-align: center;
            font-size: 13px;
            color: var(--muted);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

            .data-source-card {
                grid-template-columns: 1fr;
            }

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

            .page-header h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                min-height: 60px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                display: flex;
                top: 60px;
            }

            .logo {
                font-size: 20px;
            }

            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 14px;
            }

            .container {
                padding: 0 20px;
            }

            .page-header {
                padding: 24px 0 28px;
            }

            .page-header h1 {
                font-size: 28px;
            }

            .page-header-visual {
                width: 100%;
                height: 180px;
            }

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

            .stat-card .stat-value {
                font-size: 32px;
            }

            .timeline-container {
                padding: 20px;
            }

            .timeline-item {
                flex-direction: column;
                gap: 8px;
                padding: 16px 0;
            }

            .timeline-time {
                width: 100%;
                text-align: left;
                display: flex;
                gap: 12px;
                align-items: center;
            }

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

            .section-heading h2 {
                font-size: 24px;
            }

            .cta-card {
                padding: 28px 20px;
            }

            .cta-card h2 {
                font-size: 22px;
            }

            .cta-form {
                flex-direction: column;
            }

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

            .footer-subscribe {
                flex-direction: column;
            }

            .data-source-card {
                padding: 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-header h1 {
                font-size: 24px;
            }

            .page-header-desc {
                font-size: 14px;
            }

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

            .timeline-content h3 {
                font-size: 14px;
            }

            .ranking-card-header {
                padding: 16px;
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }

            .ranking-list li {
                padding: 12px 16px;
                gap: 10px;
            }

            .event-card-body {
                padding: 16px;
            }

            .cta-card h2 {
                font-size: 20px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 13px;
                min-height: 44px;
            }
        }

/* roulang page: category4 */
:root {
            --bg: #F6F9FE;
            --surface: #FFFFFF;
            --primary: #2563EB;
            --primary-600: #1E4FD8;
            --primary-100: #E3EBFB;
            --primary-50: #F0F5FE;
            --accent: #22D3EE;
            --accent-light: #E8FAFD;
            --accent-green: #A3E635;
            --text: #0F172A;
            --muted: #64748B;
            --line: #E1E9F5;
            --warning: #F59E0B;
            --danger: #EF4444;
            --radius-sm: 12px;
            --radius-md: 16px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .04);
            --shadow-md: 0 8px 28px rgba(15, 23, 42, .06);
            --shadow-lg: 0 16px 36px rgba(15, 23, 42, .10);
            --shadow-xl: 0 24px 48px rgba(15, 23, 42, .14);
            --container: 1200px;
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-num: 'Rajdhani', 'Chakra Petch', 'Inter', var(--font-cn);
            --transition: 200ms ease;
            --transition-slow: 350ms ease;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-600);
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            appearance: none;
            -webkit-appearance: none;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul, ol {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .95);
            border-bottom: 1px solid var(--line);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(15, 23, 42, .06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 24px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }
        .nav-left {
            justify-content: flex-end;
        }
        .nav-right {
            justify-content: flex-start;
        }
        .logo {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 24px;
            letter-spacing: .5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }
        .logo span {
            color: var(--text);
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 4px;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            width: 100%;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-100);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(246, 249, 254, .98);
            z-index: 99;
            padding: 32px 28px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            transition: opacity var(--transition-slow), transform var(--transition-slow);
            transform: translateY(-8px);
            opacity: 0;
            pointer-events: none;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu .nav-link {
            display: block;
            font-size: 16px;
            padding: 14px 4px;
            border-bottom: 1px solid var(--line);
            width: 100%;
        }
        .mobile-menu .nav-link::after {
            display: none;
        }

        .breadcrumb {
            padding: 22px 0 0;
            font-size: 13px;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #aab8c8;
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        .page-header {
            padding: 36px 0 28px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .page-header h1 {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: -.5px;
            color: var(--text);
            line-height: 1.25;
            margin-bottom: 12px;
        }
        .page-header .lead {
            font-size: 16px;
            color: var(--muted);
            max-width: 680px;
            line-height: 1.8;
        }
        .page-header .count-badge {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 14px 22px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            flex-shrink: 0;
        }
        .page-header .count-badge .num {
            font-family: var(--font-num);
            font-size: 34px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }
        .page-header .count-badge .lbl {
            font-size: 13px;
            color: var(--muted);
        }

        .section {
            padding: 56px 0;
        }
        .section-alt {
            background: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }
        .section-label {
            display: inline-block;
            font-family: var(--font-num);
            font-weight: 600;
            font-size: 13px;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-light);
            border: 1px solid rgba(34, 211, 238, .2);
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -.3px;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--muted);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .filter-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 32px;
        }
        .filter-bar .label {
            font-size: 13px;
            color: var(--muted);
            font-weight: 500;
            margin-right: 4px;
        }
        .filter-btn {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--muted);
            background: var(--bg);
            border: 1px solid var(--line);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-50);
        }
        .filter-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .article-grid {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .article-card {
            display: flex;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            gap: 0;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .article-card .cover {
            width: 260px;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
            min-height: 180px;
            background: var(--primary-50);
        }
        .article-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .cover img {
            transform: scale(1.03);
        }
        .article-card .cover .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, .92);
            border: 1px solid var(--line);
            border-radius: 999px;
            padding: 3px 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            z-index: 2;
        }
        .article-card .body {
            padding: 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .article-card .body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .article-card .body h3 a {
            color: var(--text);
        }
        .article-card .body h3 a:hover {
            color: var(--primary);
        }
        .article-card .body .excerpt {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--muted);
        }
        .article-card .meta .author {
            display: flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            color: var(--text);
        }
        .article-card .meta .author .avatar {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-100);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .article-card .meta .dot {
            color: #aab8c8;
        }
        .article-card .meta .read-time {
            color: var(--primary);
            font-weight: 500;
        }

        .featured-section {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-md);
            display: flex;
            gap: 28px;
            align-items: center;
        }
        .featured-section .feat-cover {
            width: 320px;
            flex-shrink: 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            min-height: 200px;
            background: var(--primary-50);
        }
        .featured-section .feat-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .featured-section .feat-body {
            flex: 1;
        }
        .featured-section .feat-body .badge-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .feat-body .feat-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .feat-body .feat-excerpt {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .feat-body .feat-meta {
            font-size: 13px;
            color: var(--muted);
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }

        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .topic-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: left;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .topic-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .topic-card .topic-icon {
            font-size: 24px;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary-50);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 8px;
        }
        .topic-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }
        .topic-card p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.55;
            margin: 0;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .faq-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-card.open {
            border-color: var(--primary);
        }
        .faq-card .faq-q {
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: background var(--transition);
        }
        .faq-card .faq-q:hover {
            background: var(--primary-50);
        }
        .faq-card .faq-q .icon {
            font-size: 18px;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-card.open .faq-q .icon {
            transform: rotate(45deg);
        }
        .faq-card .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 22px;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
        }
        .faq-card.open .faq-a {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        .cta-box {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 44px 38px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
        }
        .cta-box .cta-text h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-box .cta-text p {
            color: rgba(255, 255, 255, .85);
            font-size: 15px;
            margin: 0;
            line-height: 1.7;
        }
        .cta-box .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 12px;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            white-space: nowrap;
            min-height: 48px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-600);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, .25);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
        }
        .btn-white:hover {
            background: var(--primary-50);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 255, 255, .2);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-50);
            border-color: var(--primary-600);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            min-height: 40px;
            border-radius: 10px;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-white:focus-visible {
            outline-color: #fff;
        }

        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 52px 0 24px;
            margin-top: 8px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand h3 {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.65;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 14px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: var(--muted);
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--primary);
        }
        .footer-subscribe {
            display: flex;
            gap: 8px;
            margin-top: 10px;
        }
        .footer-subscribe input {
            flex: 1;
            min-width: 0;
            padding: 10px 14px;
            border: 1px solid var(--line);
            border-radius: 10px;
            background: var(--bg);
            color: var(--text);
            font-size: 13px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-100);
        }
        .footer-subscribe button {
            padding: 10px 18px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            transition: background var(--transition);
            white-space: nowrap;
        }
        .footer-subscribe button:hover {
            background: var(--primary-600);
        }
        .footer-bottom {
            border-top: 1px solid var(--line);
            padding-top: 20px;
            font-size: 13px;
            color: var(--muted);
            text-align: center;
        }
        .footer-bottom span {
            color: var(--primary);
            font-weight: 500;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
            .nav-left, .nav-right {
                gap: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .featured-section {
                flex-direction: column;
                align-items: flex-start;
            }
            .featured-section .feat-cover {
                width: 100%;
                min-height: 220px;
            }
        }
        @media (max-width: 768px) {
            .nav-left, .nav-right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-menu {
                display: flex;
            }
            .header-inner {
                justify-content: space-between;
            }
            .logo {
                font-size: 20px;
            }
            .page-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .page-header h1 {
                font-size: 28px;
            }
            .page-header .count-badge {
                align-self: flex-start;
            }
            .article-card {
                flex-direction: column;
            }
            .article-card .cover {
                width: 100%;
                min-height: 180px;
                max-height: 220px;
            }
            .article-card .body {
                padding: 18px 20px;
            }
            .section {
                padding: 36px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .cta-box {
                padding: 28px 22px;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-box .cta-text h2 {
                font-size: 22px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .featured-section {
                padding: 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-subscribe {
                flex-direction: column;
            }
            .article-card .meta {
                gap: 8px;
            }
            .filter-bar {
                padding: 10px 12px;
            }
            .filter-btn {
                padding: 6px 12px;
                font-size: 12px;
            }
            .breadcrumb {
                font-size: 12px;
            }
        }