/* roulang page: index */
:root {
            --brand-600: #0B728C;
            --brand-500: #1495A3;
            --brand-100: #E6F4F5;
            --accent-500: #F97316;
            --accent-600: #EA580C;
            --ink-900: #102A30;
            --ink-600: #49636B;
            --ink-400: #7D949C;
            --bg-100: #F5F9FA;
            --card: #FFFFFF;
            --line: #DCE8EB;
            --success: #10B981;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: var(--bg-100);
            color: var(--ink-900);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            background: none;
            outline: none;
        }
        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 72px;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--line);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(16, 42, 48, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--brand-600);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 800;
            font-size: 16px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--ink-900);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0 auto;
        }
        .nav-link {
            font-size: 15px;
            color: var(--ink-600);
            font-weight: 500;
            padding: 8px 2px;
            position: relative;
            transition: color 0.2s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand-600);
        }
        .nav-link.active {
            color: var(--brand-600);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--brand-600);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .activity-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--accent-600);
            background: rgba(249, 115, 22, 0.08);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            white-space: nowrap;
        }
        .activity-badge .dot {
            width: 6px;
            height: 6px;
            background: #EF4444;
            border-radius: 50%;
            animation: ping 1.5s ease infinite;
        }
        @keyframes ping {
            0% {
                opacity: 1;
                transform: scale(1);
            }
            70% {
                opacity: 0.6;
                transform: scale(1.4);
            }
            100% {
                opacity: 1;
                transform: scale(1);
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            padding: 12px 24px;
            transition: all 0.2s ease;
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent-500);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-600);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
        }
        .btn-primary:active {
            background: #d14e08;
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.3);
        }
        .btn-outline {
            background: #fff;
            border: 1px solid var(--brand-600);
            color: var(--brand-600);
        }
        .btn-outline:hover {
            background: var(--brand-100);
        }
        .btn-outline:focus-visible {
            box-shadow: 0 0 0 3px rgba(11, 114, 140, 0.15);
        }
        .btn-white {
            background: #fff;
            color: var(--brand-600);
        }
        .btn-white:hover {
            background: var(--brand-100);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
        }
        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--ink-900);
            border-radius: 2px;
            transition: 0.3s;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--line);
            padding: 20px 24px;
            z-index: 99;
            box-shadow: 0 12px 24px rgba(16, 42, 48, 0.08);
            flex-direction: column;
            gap: 14px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            padding: 10px 12px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--ink-600);
            font-weight: 500;
            border-bottom: 1px solid var(--bg-100);
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        .mobile-menu a.active {
            color: var(--brand-600);
            background: var(--brand-100);
        }
        .mobile-menu .btn {
            margin-top: 8px;
        }
        .section {
            padding: 96px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink-900);
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--ink-600);
            max-width: 640px;
            line-height: 1.8;
        }
        .hero {
            padding-top: 150px;
            padding-bottom: 96px;
            position: relative;
            background: linear-gradient(180deg, var(--bg-100) 0%, #fff 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink-900);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-subtitle {
            font-size: 18px;
            color: var(--ink-600);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }
        .hero-tags span {
            font-size: 13px;
            color: var(--ink-600);
            background: var(--bg-100);
            border: 1px solid var(--line);
            padding: 6px 16px;
            border-radius: 20px;
        }
        .browser-frame {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--line);
            box-shadow: 0 20px 50px rgba(16, 42, 48, 0.10);
            overflow: hidden;
        }
        .browser-dots {
            display: flex;
            gap: 6px;
            padding: 14px 16px;
            background: #fafcfc;
            border-bottom: 1px solid var(--line);
        }
        .browser-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #DCE0E2;
        }
        .browser-dots span:first-child {
            background: #F87171;
        }
        .browser-dots span:nth-child(2) {
            background: #FBBF24;
        }
        .browser-dots span:last-child {
            background: #34D399;
        }
        .browser-frame img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4 / 3;
        }
        .visual-caption {
            font-size: 13px;
            color: var(--ink-400);
            text-align: center;
            padding: 12px 16px;
            border-top: 1px solid var(--line);
            background: #fff;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 32px 24px;
            box-shadow: 0 1px 2px rgba(16, 42, 48, 0.06);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(16, 42, 48, 0.08);
        }
        .feature-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--brand-100);
            line-height: 1;
            margin-bottom: 16px;
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--brand-600);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.7;
        }
        .demo-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 80px;
        }
        .demo-block:last-child {
            margin-bottom: 0;
        }
        .demo-block.reverse .demo-visual {
            order: 2;
        }
        .demo-block.reverse .demo-copy {
            order: 1;
        }
        .demo-copy h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 16px;
        }
        .demo-copy p {
            font-size: 16px;
            color: var(--ink-600);
            line-height: 1.8;
            max-width: 460px;
        }
        .demo-copy .step-list {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .demo-copy .step-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .demo-copy .step-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .demo-copy .step-text {
            font-size: 15px;
            color: var(--ink-600);
            line-height: 1.6;
        }
        .evidence {
            background: var(--brand-600);
            padding: 96px 0;
            color: #fff;
        }
        .evidence-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .evidence-metrics {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .metric-item {
            display: flex;
            align-items: baseline;
            gap: 16px;
        }
        .metric-num {
            font-size: 52px;
            font-weight: 800;
            line-height: 1;
            font-variant-numeric: tabular-nums;
            color: #fff;
        }
        .metric-unit {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 600;
        }
        .metric-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-left: 4px;
        }
        .evidence-cards {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .testimonial-card {
            background: rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            padding: 24px;
            backdrop-filter: blur(4px);
        }
        .testimonial-card .quote {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.95);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .testimonial-card .author {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .stars {
            color: #FBBF24;
            font-size: 14px;
            letter-spacing: 2px;
        }
        .news-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 1px 2px rgba(16, 42, 48, 0.06);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(16, 42, 48, 0.08);
        }
        .news-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .news-card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink-900);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .excerpt {
            font-size: 14px;
            color: var(--ink-400);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card .meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--ink-400);
            border-top: 1px solid var(--bg-100);
            padding-top: 14px;
        }
        .news-card .read-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--brand-600);
            font-weight: 600;
            font-size: 13px;
            transition: gap 0.2s ease;
        }
        .news-card .read-link:hover {
            gap: 8px;
        }
        .empty-state {
            background: #fff;
            border: 1px dashed var(--line);
            border-radius: 12px;
            padding: 48px 24px;
            text-align: center;
            color: var(--ink-400);
            font-size: 15px;
        }
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }
        .pricing-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 32px 28px;
            box-shadow: 0 4px 16px rgba(16, 42, 48, 0.05);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .pricing-card.recommended {
            background: var(--brand-100);
            border: 2px solid var(--brand-600);
            transform: scale(1.04);
            z-index: 1;
            box-shadow: 0 16px 32px rgba(16, 42, 48, 0.10);
        }
        .pricing-recommend {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent-500);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 20px;
            white-space: nowrap;
            box-shadow: 0 4px 8px rgba(249, 115, 22, 0.3);
        }
        .pricing-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 8px;
        }
        .pricing-price {
            font-size: 40px;
            font-weight: 800;
            color: var(--ink-900);
            line-height: 1.2;
            margin-bottom: 20px;
            font-variant-numeric: tabular-nums;
        }
        .pricing-price .currency {
            font-size: 18px;
            font-weight: 600;
            vertical-align: super;
            margin-right: 2px;
        }
        .pricing-price .period {
            font-size: 14px;
            font-weight: 400;
            color: var(--ink-400);
        }
        .pricing-features {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-bottom: 28px;
            flex: 1;
        }
        .pricing-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.5;
        }
        .pricing-features .check {
            color: var(--success);
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }
        .faq-item.active {
            border-color: var(--brand-500);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-900);
            cursor: pointer;
            gap: 16px;
            user-select: none;
        }
        .faq-question .icon {
            transition: transform 0.2s ease;
            flex-shrink: 0;
            color: var(--ink-400);
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(180deg);
            color: var(--brand-600);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            background: var(--bg-100);
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.8;
            padding: 0 24px;
        }
        .faq-answer-inner {
            padding: 4px 0 20px;
        }
        .cta-banner {
            background: var(--brand-600);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }
        .cta-banner h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .countdown-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            font-variant-numeric: tabular-nums;
        }
        .countdown-tag .time {
            font-size: 16px;
            font-weight: 800;
            letter-spacing: 1px;
            color: #FDE68A;
        }
        .site-footer {
            background: var(--ink-900);
            color: #A7BCC3;
            padding-top: 64px;
            font-size: 13px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 22px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 13px;
            color: #A7BCC3;
            line-height: 1.7;
            max-width: 260px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #A7BCC3;
            padding: 4px 0;
            transition: color 0.2s ease;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom .copyright {
            font-size: 12px;
            color: #889EA5;
        }
        .back-to-top {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: #A7BCC3;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .back-to-top:hover {
            color: #fff;
        }
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .float-cta .bubble {
            background: var(--accent-500);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 12px 20px;
            border-radius: 24px;
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.3);
            white-space: nowrap;
            opacity: 0;
            transform: translateX(10px);
            transition: opacity 0.3s ease, transform 0.3s ease;
            pointer-events: none;
            position: absolute;
            right: calc(100% + 12px);
            top: 50%;
            transform: translateY(-50%) translateX(10px);
            display: none;
        }
        .float-cta:hover .bubble {
            opacity: 1;
            transform: translateY(-50%) translateX(0);
            display: block;
        }
        .float-cta-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-500);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease;
            flex-shrink: 0;
        }
        .float-cta-btn:hover {
            background: var(--accent-600);
            transform: scale(1.05);
        }
        .mobile-float-cta {
            display: none;
            position: fixed;
            left: 16px;
            right: 16px;
            bottom: 16px;
            z-index: 999;
            background: var(--accent-500);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            padding: 14px 24px;
            border-radius: 24px;
            text-align: center;
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
            cursor: pointer;
            transition: background 0.2s ease;
        }
        .mobile-float-cta:hover {
            background: var(--accent-600);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .desktop-nav {
                gap: 16px;
            }
            .desktop-nav .nav-link {
                font-size: 14px;
            }
            .activity-badge {
                display: none;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .pricing-card.recommended {
                transform: scale(1);
            }
            .hero-grid,
            .evidence-grid {
                gap: 40px;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }
            .desktop-nav {
                display: none;
            }
            .header-actions .btn {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero {
                padding-top: 110px;
                padding-bottom: 64px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .demo-block {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .demo-block.reverse .demo-visual {
                order: 1;
            }
            .demo-block.reverse .demo-copy {
                order: 2;
            }
            .evidence-grid {
                grid-template-columns: 1fr;
                gap: 48px;
            }
            .metric-num {
                font-size: 40px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .pricing-card.recommended {
                transform: scale(1);
            }
            .float-cta {
                display: none;
            }
            .mobile-float-cta {
                display: block;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-tags {
                gap: 8px;
            }
            .hero-tags span {
                font-size: 12px;
                padding: 4px 12px;
            }
            .pricing-price {
                font-size: 36px;
            }
        }

/* roulang page: category1 */
:root {
            --brand-600: #0B728C;
            --brand-500: #1495A3;
            --brand-100: #E6F4F5;
            --accent-500: #F97316;
            --accent-600: #EA580C;
            --ink-900: #102A30;
            --ink-600: #49636B;
            --ink-400: #7D949C;
            --bg-100: #F5F9FA;
            --card: #FFFFFF;
            --line: #DCE8EB;
            --success: #10B981;
            --shadow-sm: 0 1px 2px rgba(16, 42, 48, 0.06), 0 4px 12px rgba(16, 42, 48, 0.05);
            --shadow-md: 0 4px 16px rgba(16, 42, 48, 0.10), 0 8px 24px rgba(16, 42, 48, 0.08);
            --shadow-lg: 0 12px 32px rgba(16, 42, 48, 0.14);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: var(--bg-100);
            color: var(--ink-900);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

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

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 72px;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(16, 42, 48, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-100);
            border-radius: 10px;
            color: var(--brand-600);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--ink-900);
            letter-spacing: 0.5px;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-600);
            padding: 8px 2px;
            position: relative;
            transition: color 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--brand-600);
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--brand-600);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .activity-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-600);
            background: rgba(249, 115, 22, 0.08);
            padding: 5px 10px;
            border-radius: 999px;
            border: 1px solid rgba(249, 115, 22, 0.2);
        }

        .activity-badge .dot {
            width: 6px;
            height: 6px;
            background: #EF4444;
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 1.5s ease infinite;
        }

        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.4);
            }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 14px;
            border-radius: 8px;
            padding: 10px 22px;
            transition: all 0.25s ease;
            border: 1.5px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent-500);
            color: #fff;
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(249, 115, 22, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            background: #C2410C;
        }

        .btn-outline {
            background: #fff;
            border-color: var(--brand-600);
            color: var(--brand-600);
        }

        .btn-outline:hover {
            background: var(--brand-100);
            transform: translateY(-2px);
        }

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

        .btn-light {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
            backdrop-filter: blur(4px);
        }

        .btn-light:hover {
            background: rgba(255, 255, 255, 0.25);
            color: #fff;
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 13px;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
        }

        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: var(--bg-100);
            border-radius: 8px;
        }

        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--ink-900);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-drawer {
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--line);
            box-shadow: var(--shadow-md);
            z-index: 999;
            padding: 20px 24px 28px;
            display: none;
        }

        .mobile-drawer.open {
            display: block;
        }

        .mobile-drawer .nav-link {
            display: block;
            padding: 14px 0;
            font-size: 16px;
            border-bottom: 1px solid rgba(220, 232, 235, 0.5);
        }

        .mobile-drawer .nav-link.active {
            color: var(--brand-600);
        }

        .drawer-actions {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-top: 20px;
        }

        .drawer-actions .btn {
            width: 100%;
            padding: 14px;
        }

        /* Page banner (category hero) */
        .category-main {
            padding-top: 72px;
        }

        .category-banner {
            position: relative;
            height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, rgba(11, 114, 140, 0.88), rgba(20, 149, 163, 0.82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            overflow: hidden;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(16, 42, 48, 0.4) 0%, transparent 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            color: #fff;
            padding: 0 24px;
        }

        .banner-content h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .banner-content .banner-desc {
            max-width: 700px;
            margin: 0 auto;
            font-size: 17px;
            color: rgba(255, 255, 255, 0.92);
            line-height: 1.7;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .banner-tag i {
            font-size: 14px;
        }

        .crumb {
            position: absolute;
            top: 90px;
            left: 24px;
            z-index: 2;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 1152px;
            margin: 0 auto;
        }

        .crumb a {
            color: rgba(255, 255, 255, 0.75);
        }

        .crumb a:hover {
            color: #fff;
        }

        .crumb span {
            margin: 0 8px;
            opacity: 0.6;
        }

        .crumb .current {
            color: #fff;
        }

        /* Section */
        .section {
            padding: 96px 0;
        }

        .section.bg-white {
            background: #fff;
        }

        .section.bg-light {
            background: var(--bg-100);
        }

        .section.bg-dark {
            background: var(--ink-900);
            color: #fff;
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--ink-900);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--ink-600);
            line-height: 1.8;
        }

        .section-header.light .section-title {
            color: #fff;
        }

        .section-header.light .section-desc {
            color: rgba(255, 255, 255, 0.8);
        }

        .section-header.light .section-tag {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--card);
            border-radius: 12px;
            border: 1px solid var(--line);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            position: relative;
        }

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

        .feature-card .card-num {
            font-size: 28px;
            font-weight: 800;
            color: rgba(11, 114, 140, 0.15);
            margin-bottom: 12px;
            font-variant-numeric: tabular-nums;
            line-height: 1;
        }

        .feature-card .icon-wrap {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-100);
            color: var(--brand-600);
            margin-bottom: 16px;
            font-size: 20px;
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.7;
        }

        /* Content categories / sport type tabs */
        .sport-tabs {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 48px;
        }

        .sport-tab {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: #fff;
            border: 1.5px solid var(--line);
            font-size: 14px;
            font-weight: 600;
            color: var(--ink-600);
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .sport-tab i {
            font-size: 16px;
            color: var(--brand-500);
        }

        .sport-tab:hover {
            border-color: var(--brand-500);
            color: var(--brand-600);
            background: var(--brand-100);
        }

        .sport-tab.active {
            background: var(--brand-600);
            color: #fff;
            border-color: var(--brand-600);
        }

        .sport-tab.active i {
            color: #fff;
        }

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

        .info-card {
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            display: flex;
            flex-direction: column;
        }

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

        .info-card .card-img {
            position: relative;
            height: 170px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .info-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .info-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--brand-600);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 6px;
            z-index: 2;
        }

        .info-card .card-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .info-card .card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 8px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 48px;
        }

        .info-card .card-summary {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .card-meta {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid rgba(220, 232, 235, 0.5);
        }

        .info-card .card-date {
            font-size: 12px;
            color: var(--ink-400);
            font-variant-numeric: tabular-nums;
        }

        .info-card .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s ease;
        }

        .info-card .card-link:hover {
            gap: 8px;
        }

        /* Highlight feature split sections */
        .split-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .split-visual {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }

        .split-visual img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .split-visual .browser-bar {
            height: 32px;
            background: #fff;
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 0 14px;
            border-bottom: 1px solid var(--line);
        }

        .browser-bar span {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            display: block;
        }

        .browser-bar span:nth-child(1) {
            background: #F87171;
        }

        .browser-bar span:nth-child(2) {
            background: #FBBF24;
        }

        .browser-bar span:nth-child(3) {
            background: #34D399;
        }

        .split-copy h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--ink-900);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .split-copy p {
            font-size: 15px;
            color: var(--ink-600);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .split-copy .check-list {
            list-style: none;
            margin: 16px 0 0;
            padding: 0;
        }

        .split-copy .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--ink-600);
            margin-bottom: 10px;
        }

        .split-copy .check-list li i {
            color: var(--success);
            margin-top: 4px;
            font-size: 14px;
            flex-shrink: 0;
        }

        /* Process / timeline */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .process-card {
            text-align: center;
            padding: 32px 24px;
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            position: relative;
        }

        .process-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            margin: 0 auto 16px;
            font-variant-numeric: tabular-nums;
        }

        .process-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 10px;
        }

        .process-card p {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.7;
        }

        .process-card .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--brand-600);
            margin: 0 auto 16px;
        }

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 20px 24px;
            margin-bottom: 14px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .faq-item:hover {
            border-color: var(--brand-500);
        }

        .faq-item.open {
            background: var(--bg-100);
            border-color: var(--brand-500);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-900);
        }

        .faq-icon {
            font-size: 14px;
            color: var(--brand-600);
            transition: transform 0.2s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.8;
        }

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

        /* Data block / stats */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }

        .stats-item {
            text-align: center;
        }

        .stats-number {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stats-number span {
            font-size: 24px;
            font-weight: 600;
            margin-left: 2px;
            color: rgba(255, 255, 255, 0.7);
        }

        .stats-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        .evidence-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 32px;
        }

        .evidence-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 12px;
            padding: 20px;
            backdrop-filter: blur(4px);
            color: #fff;
        }

        .evidence-card .quote {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.92);
            margin-bottom: 12px;
        }

        .evidence-card .author {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .evidence-card .stars {
            color: #FBBF24;
            font-size: 13px;
            letter-spacing: 2px;
        }

        /* CTA section */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, #0B728C 0%, #1495A3 100%);
            padding: 80px 0;
            text-align: center;
            overflow: hidden;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .countdown-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 8px;
        }

        .countdown {
            display: inline-flex;
            gap: 8px;
            background: rgba(0, 0, 0, 0.2);
            padding: 12px 24px;
            border-radius: 12px;
            margin-bottom: 28px;
            font-variant-numeric: tabular-nums;
        }

        .countdown-num {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            min-width: 30px;
            text-align: center;
        }

        .countdown-sep {
            color: rgba(255, 255, 255, 0.5);
            font-size: 20px;
            line-height: 1.8;
        }

        /* Footer */
        .site-footer {
            background: var(--ink-900);
            color: #A7BCC3;
            padding: 72px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand p {
            margin-top: 16px;
            font-size: 13px;
            line-height: 1.8;
            color: rgba(167, 188, 195, 0.8);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            color: #A7BCC3;
            font-size: 13px;
            line-height: 2.4;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(167, 188, 195, 0.6);
        }

        .back-to-top {
            cursor: pointer;
            color: rgba(167, 188, 195, 0.8);
            transition: color 0.2s ease;
        }

        .back-to-top:hover {
            color: #fff;
        }

        /* Float CTA */
        .float-cta {
            position: fixed;
            bottom: 24px;
            right: 24px;
            z-index: 999;
        }

        .float-cta-desktop {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-500);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4);
            position: relative;
            transition: all 0.3s ease;
        }

        .float-cta-desktop:hover {
            background: var(--accent-600);
            transform: scale(1.05);
        }

        .float-cta-desktop .bubble {
            position: absolute;
            right: 64px;
            top: 50%;
            transform: translateY(-50%) translateX(8px);
            background: var(--ink-900);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 8px 14px;
            border-radius: 8px;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: all 0.3s ease;
        }

        .float-cta-desktop:hover .bubble {
            opacity: 1;
            transform: translateY(-50%) translateX(0);
        }

        .float-cta-mobile {
            display: none;
        }

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

            .nav-link {
                font-size: 14px;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

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

            .site-header {
                height: 64px;
            }

            .desktop-nav {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .mobile-drawer {
                top: 64px;
            }

            .activity-badge {
                display: none;
            }

            .header-actions .btn-sm {
                padding: 7px 14px;
                font-size: 13px;
            }

            .category-main {
                padding-top: 64px;
            }

            .category-banner {
                height: 200px;
            }

            .category-banner h1 {
                font-size: 28px;
            }

            .category-banner .banner-desc {
                font-size: 15px;
            }

            .crumb {
                top: 80px;
                left: 16px;
                font-size: 12px;
            }

            .section {
                padding: 64px 0;
            }

            .section-title {
                font-size: 24px;
            }

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

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

            .split-section {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .split-visual img {
                height: 220px;
            }

            .split-copy h3 {
                font-size: 20px;
            }

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

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

            .stats-number {
                font-size: 36px;
            }

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

            .cta-section {
                padding: 56px 0;
            }

            .cta-title {
                font-size: 26px;
            }

            .cta-desc {
                font-size: 15px;
            }

            .countdown {
                padding: 10px 16px;
                gap: 6px;
            }

            .countdown-num {
                font-size: 18px;
            }

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

            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }

            .float-cta-desktop {
                display: none;
            }

            .float-cta-mobile {
                display: flex;
                position: fixed;
                bottom: 12px;
                left: 16px;
                right: 16px;
                background: var(--accent-500);
                color: #fff;
                padding: 14px;
                border-radius: 12px;
                font-weight: 700;
                font-size: 15px;
                align-items: center;
                justify-content: center;
                gap: 8px;
                box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4);
                z-index: 999;
            }

            .float-cta-mobile:hover {
                background: var(--accent-600);
            }

            .sport-tabs {
                gap: 8px;
            }

            .sport-tab {
                padding: 7px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 17px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
            }

            .header-actions .btn-sm {
                display: none;
            }

            .card-img {
                height: 160px;
            }

            .category-banner {
                height: 180px;
            }

            .category-banner h1 {
                font-size: 24px;
            }
        }

/* roulang page: article */
:root {
            --brand-600: #0B728C;
            --brand-500: #1495A3;
            --brand-100: #E6F4F5;
            --accent-500: #F97316;
            --accent-600: #EA580C;
            --ink-900: #102A30;
            --ink-600: #49636B;
            --ink-400: #7D949C;
            --bg-100: #F5F9FA;
            --card: #FFFFFF;
            --line: #DCE8EB;
            --success: #10B981;
            --shadow-sm: 0 1px 2px rgba(16, 42, 48, 0.06), 0 4px 12px rgba(16, 42, 48, 0.05);
            --shadow-md: 0 8px 24px rgba(16, 42, 48, 0.12);
            --radius-lg: 12px;
            --radius-md: 8px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: var(--bg-100);
            color: var(--ink-900);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: #fff;
            border-bottom: 1px solid var(--line);
            height: 72px;
            transition: box-shadow .2s ease;
        }

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

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--ink-900);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .desktop-nav {
            display: flex;
            gap: 4px;
            margin: 0 12px;
        }

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-600);
            border-radius: var(--radius-md);
            transition: color .2s ease, background .2s ease;
        }

        .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-100);
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-600);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .activity-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-600);
            background: #FFF4E6;
            padding: 6px 12px;
            border-radius: 999px;
            white-space: nowrap;
        }

        .activity-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #EF4444;
            position: relative;
        }

        .activity-badge .dot::after {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: rgba(239, 68, 68, 0.4);
            animation: badgePing 1.5s infinite;
        }

        @keyframes badgePing {
            0% {
                transform: scale(.8);
                opacity: .8;
            }
            70% {
                transform: scale(1.6);
                opacity: 0;
            }
            100% {
                opacity: 0;
            }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all .2s ease;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent-500);
            color: #fff;
            padding: 12px 24px;
        }

        .btn-primary:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(249, 115, 22, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
            background: #D5520B;
        }

        .btn-secondary {
            background: #fff;
            color: var(--brand-600);
            border: 1px solid var(--brand-600);
            padding: 12px 24px;
        }

        .btn-secondary:hover {
            background: var(--brand-100);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-md);
            background: transparent;
            transition: background .2s;
        }

        .mobile-toggle:hover {
            background: var(--bg-100);
        }

        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--ink-900);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }

        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--line);
            padding: 12px 0 20px;
            z-index: 99;
            box-shadow: var(--shadow-sm);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .container {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .mobile-nav-link {
            display: block;
            padding: 14px 12px;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink-600);
            border-radius: var(--radius-md);
            transition: background .2s, color .2s;
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            background: var(--brand-100);
            color: var(--brand-600);
        }

        .mobile-menu-actions {
            padding: 16px 12px 4px;
            border-top: 1px solid var(--line);
            margin-top: 8px;
        }

        .mobile-menu-actions .btn {
            width: 100%;
        }

        /* ===== Article Page ===== */
        .article-page {
            padding-top: 72px;
        }

        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--line);
            padding: 18px 0;
        }

        .breadcrumb {
            max-width: 720px;
            margin: 0 auto;
            font-size: 14px;
            color: var(--ink-400);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--ink-600);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--brand-600);
        }

        .breadcrumb .sep {
            color: var(--line);
        }

        .breadcrumb .current {
            color: var(--ink-600);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 320px;
        }

        .article-section {
            padding: 56px 0 72px;
        }

        .article-layout {
            max-width: 720px;
            margin: 0 auto;
        }

        .article-head {
            margin-bottom: 32px;
        }

        .article-head h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            font-size: 14px;
            color: var(--ink-600);
            padding-bottom: 24px;
            border-bottom: 1px solid var(--line);
            font-variant-numeric: tabular-nums;
        }

        .meta-cat {
            display: inline-block;
            background: var(--brand-100);
            color: var(--brand-600);
            padding: 4px 14px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 13px;
        }

        .meta-date,
        .meta-views {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--ink-900);
            word-break: break-word;
        }

        .article-body p {
            margin-bottom: 1.5em;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 32px 0 16px;
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 28px 0 14px;
            line-height: 1.4;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 700;
            margin: 24px 0 12px;
        }

        .article-body img {
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            margin: 24px 0;
        }

        .article-body blockquote {
            border-left: 3px solid var(--brand-500);
            background: var(--brand-100);
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            margin: 24px 0;
            color: var(--ink-600);
        }

        .article-body pre {
            background: #F0F4F5;
            border-radius: 8px;
            padding: 16px;
            overflow-x: auto;
            margin-bottom: 1.5em;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-body code {
            background: #F0F4F5;
            border-radius: 6px;
            padding: 2px 6px;
            font-size: 14px;
        }

        .article-body pre code {
            padding: 0;
            background: transparent;
        }

        .article-body ul,
        .article-body ol {
            margin-bottom: 1.5em;
            padding-left: 1.5em;
        }

        .article-body li {
            margin-bottom: .5em;
        }

        .article-body a {
            color: var(--brand-600);
            border-bottom: 1px solid rgba(11, 114, 140, .3);
            transition: border-color .2s;
        }

        .article-body a:hover {
            border-color: var(--brand-600);
        }

        .not-found {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 64px 24px;
            text-align: center;
        }

        .not-found p {
            font-size: 20px;
            font-weight: 600;
            color: var(--ink-600);
            margin-bottom: 20px;
        }

        /* ===== Related ===== */
        .related-section {
            padding: 72px 0;
            background: #fff;
            border-top: 1px solid var(--line);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-head .section-tag {
            display: inline-block;
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            background: var(--brand-100);
            padding: 6px 16px;
            border-radius: 999px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            margin: 14px 0 8px;
            line-height: 1.3;
        }

        .section-head p {
            color: var(--ink-600);
            font-size: 16px;
        }

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

        .news-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .2s ease, box-shadow .2s ease;
            display: flex;
            flex-direction: column;
        }

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

        .news-card .thumb {
            height: 170px;
            overflow: hidden;
            background: var(--bg-100);
        }

        .news-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

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

        .news-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-tag {
            align-self: flex-start;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--ink-900);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 46px;
            transition: color .2s;
        }

        .news-card h3:hover {
            color: var(--brand-600);
        }

        .news-card p {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .card-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--ink-400);
            font-variant-numeric: tabular-nums;
        }

        .card-footer .read-more {
            color: var(--brand-600);
            font-weight: 600;
            transition: color .2s;
        }

        .card-footer .read-more:hover {
            color: var(--accent-500);
        }

        /* ===== Back Entry ===== */
        .back-entry {
            text-align: center;
            padding: 48px 0 0;
        }

        /* ===== Inline CTA ===== */
        .inline-cta {
            position: relative;
            background: var(--ink-900);
            margin: 72px 0 0;
            padding: 72px 24px;
            text-align: center;
            overflow: hidden;
        }

        .inline-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.1;
        }

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

        .inline-cta h2 {
            color: #fff;
            font-size: 34px;
            font-weight: 800;
            line-height: 1.35;
            max-width: 680px;
            margin: 0 auto 14px;
        }

        .inline-cta p {
            color: #A7BCC3;
            margin: 0 auto 32px;
            font-size: 17px;
            max-width: 520px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--ink-900);
            color: #A7BCC3;
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand p {
            font-size: 14px;
            margin-top: 16px;
            line-height: 1.8;
            color: #A7BCC3;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #A7BCC3;
            padding: 6px 0;
            line-height: 1.6;
            transition: color .2s, padding-left .2s;
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            flex-wrap: wrap;
        }

        .copyright {
            color: #A7BCC3;
        }

        .back-to-top {
            color: #A7BCC3;
            cursor: pointer;
            font-size: 13px;
            transition: color .2s;
        }

        .back-to-top:hover {
            color: #fff;
        }

        /* ===== Float CTA ===== */
        .float-cta {
            position: fixed;
            bottom: 24px;
            right: 24px;
            z-index: 90;
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .float-cta .cta-bubble {
            background: var(--accent-500);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 18px;
            border-radius: 999px;
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.3);
            opacity: 0;
            transform: translateX(12px);
            transition: opacity .2s ease, transform .2s ease;
            pointer-events: none;
            white-space: nowrap;
        }

        .float-cta:hover .cta-bubble,
        .float-cta:focus-within .cta-bubble {
            opacity: 1;
            transform: translateX(0);
        }

        .float-cta .cta-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-500);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.3);
            transition: background .2s ease, transform .2s ease;
        }

        .float-cta .cta-btn:hover {
            background: var(--accent-600);
            transform: scale(1.06);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .desktop-nav {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

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

        @media (max-width: 767px) {
            .site-header {
                height: 64px;
            }

            .header-inner {
                height: 64px;
                padding: 0 16px;
            }

            .mobile-menu {
                top: 64px;
            }

            .container {
                padding: 0 16px;
            }

            .activity-badge {
                display: none;
            }

            .btn-sm {
                padding: 7px 14px;
                font-size: 13px;
            }

            .article-page {
                padding-top: 64px;
            }

            .breadcrumb-bar {
                padding: 16px 0;
            }

            .article-section {
                padding: 40px 0 56px;
            }

            .article-layout {
                padding: 0 16px;
            }

            .article-head h1 {
                font-size: 28px;
            }

            .article-meta {
                gap: 10px;
                font-size: 13px;
            }

            .related-section {
                padding: 56px 0;
            }

            .section-head h2 {
                font-size: 26px;
            }

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

            .inline-cta {
                padding: 56px 16px;
            }

            .inline-cta h2 {
                font-size: 26px;
            }

            .inline-cta p {
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .float-cta {
                bottom: 0;
                right: 0;
                left: 0;
                border-radius: 0;
                padding-bottom: calc(8px + env(safe-area-inset-bottom));
            }

            .float-cta .cta-btn {
                display: none;
            }

            .float-cta .cta-bubble {
                opacity: 1;
                transform: none;
                background: var(--accent-500);
                box-shadow: none;
                border-radius: 0;
                width: 100%;
                text-align: center;
                padding: 14px 16px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .logo-text {
                font-size: 18px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
            }

            .article-head h1 {
                font-size: 24px;
            }

            .breadcrumb .current {
                max-width: 180px;
            }
        }

/* roulang page: category2 */
:root {
            --brand-600: #0B728C;
            --brand-500: #1495A3;
            --brand-100: #E6F4F5;
            --accent-500: #F97316;
            --accent-600: #EA580C;
            --ink-900: #102A30;
            --ink-600: #49636B;
            --ink-400: #7D949C;
            --bg-100: #F5F9FA;
            --card: #FFFFFF;
            --line: #DCE8EB;
            --success: #10B981;
            --shadow-sm: 0 1px 2px rgba(16, 42, 48, 0.06), 0 4px 12px rgba(16, 42, 48, 0.05);
            --shadow-md: 0 8px 24px rgba(16, 42, 48, 0.10);
            --radius-lg: 12px;
            --radius-md: 8px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink-900);
            background: var(--bg-100);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: #fff;
            border-bottom: 1px solid var(--line);
            z-index: 1000;
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-100);
            color: var(--brand-600);
        }
        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--ink-900);
            letter-spacing: -0.02em;
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-600);
            padding: 6px 2px;
            border-bottom: 2px solid transparent;
            transition: color 0.2s, border-color 0.2s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--brand-600);
        }
        .nav-link.active {
            color: var(--brand-600);
            border-bottom-color: var(--brand-600);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .activity-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: #EF4444;
            background: rgba(239, 68, 68, 0.08);
            padding: 5px 12px;
            border-radius: 999px;
            white-space: nowrap;
        }
        .activity-badge .dot {
            position: relative;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #EF4444;
        }
        .activity-badge .dot::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            background: rgba(239, 68, 68, 0.4);
            animation: ping 1.6s ease-in-out infinite;
        }
        @keyframes ping {
            0% {
                transform: scale(0.6);
                opacity: 0.8;
            }
            80%,
            100% {
                transform: scale(1.8);
                opacity: 0;
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-md);
            padding: 10px 22px;
            transition: all 0.2s;
            cursor: pointer;
            line-height: 1.6;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent-500);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(249, 115, 22, 0.3);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-500);
            outline-offset: 2px;
        }
        .btn-outline {
            background: #fff;
            border: 1px solid var(--brand-600);
            color: var(--brand-600);
        }
        .btn-outline:hover {
            background: var(--brand-100);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 14px 34px;
            font-size: 16px;
        }
        .btn-sm {
            padding: 7px 14px;
            font-size: 14px;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 36px;
            height: 36px;
            background: transparent;
            cursor: pointer;
            border-radius: 8px;
            padding: 6px;
        }
        .mobile-toggle span {
            display: block;
            height: 2px;
            background: var(--ink-900);
            border-radius: 2px;
            transition: all 0.3s;
        }
        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--line);
            padding: 20px 24px 28px;
            z-index: 999;
            box-shadow: var(--shadow-md);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a.mobile-nav-link {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink-600);
            border-bottom: 1px solid var(--line);
        }
        .mobile-menu a.mobile-nav-link.active {
            color: var(--brand-600);
            font-weight: 700;
        }
        .mobile-menu .mobile-cta {
            margin-top: 16px;
            width: 100%;
        }
        @media (max-width: 767px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-actions .btn-sm {
                display: none;
            }
            .activity-badge {
                display: none;
            }
            .site-header {
                height: 64px;
            }
        }
        .page-hero {
            padding: 150px 0 70px;
            position: relative;
            background: linear-gradient(135deg, var(--brand-100) 0%, var(--bg-100) 60%, #fff 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 420px;
            height: 420px;
            background: linear-gradient(120deg, rgba(20, 149, 163, 0.12), rgba(249, 115, 22, 0.06));
            border-radius: 50%;
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero-inner {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--ink-900);
            margin-bottom: 18px;
        }
        .page-hero h1 .highlight {
            color: var(--brand-600);
        }
        .page-hero .lead {
            font-size: 17px;
            line-height: 1.8;
            color: var(--ink-600);
            margin-bottom: 28px;
            max-width: 480px;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .hero-tags span {
            font-size: 12px;
            font-weight: 500;
            color: var(--brand-600);
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid rgba(11, 114, 140, 0.14);
            padding: 4px 14px;
            border-radius: 999px;
        }
        .hero-visual {
            position: relative;
        }
        .browser-frame {
            background: #fff;
            border-radius: 16px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--line);
            overflow: hidden;
        }
        .browser-bar {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 12px 16px;
            border-bottom: 1px solid var(--line);
            background: #FBFDFD;
        }
        .browser-bar .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
        .browser-bar .dot:nth-child(1) {
            background: #EF4444;
        }
        .browser-bar .dot:nth-child(2) {
            background: #F59E0B;
        }
        .browser-bar .dot:nth-child(3) {
            background: #10B981;
        }
        .browser-bar .url-bar {
            flex: 1;
            margin-left: 10px;
            font-size: 12px;
            color: var(--ink-400);
            background: var(--bg-100);
            border: 1px solid var(--line);
            border-radius: 999px;
            padding: 3px 12px;
            text-align: center;
        }
        .browser-body img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        @media (max-width: 900px) {
            .page-hero-inner {
                grid-template-columns: 1fr;
            }
            .page-hero {
                padding: 120px 0 60px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .browser-body img {
                height: 180px;
            }
        }
        .section {
            padding: 96px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
        }
        .section--white {
            background: #fff;
        }
        .section--tint {
            background: var(--bg-100);
        }
        .section--dark {
            background: #0A323B;
            color: #fff;
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 48px;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: var(--brand-600);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
            background: var(--brand-100);
            padding: 4px 14px;
            border-radius: 999px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink-900);
            letter-spacing: -0.02em;
        }
        .section-head p {
            font-size: 15px;
            color: var(--ink-600);
            max-width: 420px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 28px;
            }
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }
        .feature-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-card .num {
            font-size: 28px;
            font-weight: 800;
            color: var(--brand-100);
            line-height: 1;
            margin-bottom: 22px;
            font-variant-numeric: tabular-nums;
        }
        .feature-card .icon-wrap {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--ink-900);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.7;
        }
        .steps-section {
            background: #fff;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--brand-600) 0%, var(--brand-100) 100%);
            z-index: 0;
            border-radius: 2px;
        }
        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .steps-grid::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }
        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            background: #fff;
            padding: 20px 16px 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--line);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-dot {
            width: 54px;
            height: 54px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 4px solid #fff;
            box-shadow: 0 0 0 2px var(--brand-600);
            font-variant-numeric: tabular-nums;
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--ink-900);
        }
        .step-item p {
            font-size: 13px;
            color: var(--ink-600);
            line-height: 1.7;
        }
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 80px;
        }
        .split-block:last-child {
            margin-bottom: 0;
        }
        .split-block .split-media {
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
        }
        .split-block .split-media img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .split-block .split-body h3 {
            font-size: 24px;
            font-weight: 800;
            color: var(--ink-900);
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .split-block .split-body p {
            font-size: 15px;
            color: var(--ink-600);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .split-block .split-list {
            list-style: none;
            padding: 0;
        }
        .split-block .split-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--ink-600);
            padding: 6px 0;
        }
        .split-block .split-list li .check {
            color: var(--success);
            font-weight: 700;
            flex-shrink: 0;
        }
        @media (max-width: 860px) {
            .split-block {
                grid-template-columns: 1fr;
                gap: 32px;
                margin-bottom: 56px;
            }
            .split-block .split-media img {
                height: 200px;
            }
        }
        .trust-section {
            background: #0A323B;
            color: #fff;
            padding: 96px 0;
        }
        .trust-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
        }
        .trust-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .metric-card {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 14px;
            padding: 28px 22px;
            text-align: center;
        }
        .metric-card .metric-num {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.1;
            color: #fff;
            font-variant-numeric: tabular-nums;
        }
        .metric-card .metric-label {
            font-size: 14px;
            color: #A7BCC3;
            margin-top: 8px;
        }
        .trust-testimonials {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .testimonial-card {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 14px;
            padding: 24px 26px;
        }
        .testimonial-card .stars {
            color: #FBBF24;
            font-size: 16px;
            margin-bottom: 8px;
            letter-spacing: 2px;
        }
        .testimonial-card blockquote {
            font-size: 14px;
            line-height: 1.7;
            color: #D2E3E7;
            font-style: normal;
        }
        .testimonial-card .author {
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            margin-top: 10px;
        }
        @media (max-width: 880px) {
            .trust-grid {
                grid-template-columns: 1fr;
            }
        }
        .faq-section {
            background: var(--bg-100);
        }
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.2s;
        }
        .faq-item.active {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-900);
            background: #fff;
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: var(--brand-100);
        }
        .faq-question .arrow {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            transition: transform 0.2s;
        }
        .faq-item.active .faq-question .arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background: var(--bg-100);
        }
        .faq-answer-inner {
            padding: 4px 24px 20px;
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.8;
        }
        .cta-section {
            background: linear-gradient(125deg, #0A323B 0%, #0B728C 100%);
            padding: 96px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 40px solid rgba(255, 255, 255, 0.04);
        }
        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 2;
        }
        .cta-inner .countdown {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 8px 22px;
            border-radius: 999px;
            margin-bottom: 28px;
        }
        .cta-inner .countdown .time {
            font-variant-numeric: tabular-nums;
            background: var(--accent-500);
            padding: 2px 10px;
            border-radius: 6px;
            font-size: 14px;
            color: #fff;
            letter-spacing: 1px;
        }
        .cta-inner h2 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cta-inner p {
            font-size: 16px;
            color: #A7BCC3;
            max-width: 520px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .cta-inner .btn {
            font-size: 17px;
            padding: 14px 40px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 64px 0;
            }
            .cta-inner h2 {
                font-size: 28px;
            }
        }
        .site-footer {
            background: var(--ink-900);
            color: #A7BCC3;
            padding: 72px 0 0;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 56px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #A7BCC3;
            max-width: 300px;
            margin-top: 16px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: #A7BCC3;
            padding: 6px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0 28px;
            font-size: 13px;
            color: #7D949C;
        }
        .footer-bottom a {
            color: #A7BCC3;
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        .back-to-top {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: #A7BCC3;
            background: rgba(255, 255, 255, 0.08);
            padding: 7px 16px;
            border-radius: 999px;
            cursor: pointer;
            transition: background 0.2s, color 0.2s;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .back-to-top:hover {
            background: var(--brand-600);
            color: #fff;
        }
        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 500;
            display: flex;
            align-items: center;
            gap: 0;
            background: var(--accent-500);
            color: #fff;
            border-radius: 999px;
            padding: 0;
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.45);
            transition: all 0.25s;
            overflow: hidden;
            max-width: 56px;
            cursor: pointer;
        }
        .float-cta .icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            flex-shrink: 0;
        }
        .float-cta .text {
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            opacity: 0;
            max-width: 0;
            overflow: hidden;
            transition: opacity 0.25s, max-width 0.25s;
        }
        .float-cta:hover {
            max-width: 200px;
            background: var(--accent-600);
        }
        .float-cta:hover .text {
            opacity: 1;
            max-width: 120px;
            padding-right: 20px;
        }
        @media (max-width: 640px) {
            .float-cta {
                left: 16px;
                right: 16px;
                bottom: 16px;
                max-width: none;
                justify-content: center;
                width: auto;
                height: 50px;
                border-radius: 12px;
            }
            .float-cta .icon {
                display: none;
            }
            .float-cta .text {
                opacity: 1;
                max-width: none;
                font-size: 15px;
            }
            .float-cta:hover {
                max-width: none;
            }
            .float-cta:hover .text {
                padding-right: 0;
            }
        }
        .banner-strip {
            background: var(--brand-100);
            border-radius: 14px;
            padding: 16px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 24px;
        }
        .banner-strip p {
            font-size: 14px;
            color: var(--ink-600);
        }
        .banner-strip a {
            font-weight: 600;
            color: var(--brand-600);
            border-bottom: 1px solid var(--brand-600);
            font-size: 14px;
        }
        .banner-strip a:hover {
            color: var(--accent-500);
            border-color: var(--accent-500);
        }
        .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--ink-400);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--ink-600);
        }
        .breadcrumb a:hover {
            color: var(--brand-600);
        }
        .breadcrumb .sep {
            color: var(--ink-400);
        }
        .breadcrumb .current {
            color: var(--ink-600);
            font-weight: 500;
        }

/* roulang page: category3 */
:root {
            --brand-600: #0B728C;
            --brand-500: #1495A3;
            --brand-100: #E6F4F5;
            --accent-500: #F97316;
            --accent-600: #EA580C;
            --ink-900: #102A30;
            --ink-600: #49636B;
            --ink-400: #7D949C;
            --bg-100: #F5F9FA;
            --card: #FFFFFF;
            --line: #DCE8EB;
            --success: #10B981;
            --red-500: #EF4444;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink-900);
            background: var(--bg-100);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input, select, textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1152px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 72px;
            background: rgba(255, 255, 255, 0.96);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .3s;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(16, 42, 48, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--ink-900);
            letter-spacing: -0.2px;
        }

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

        .nav-link {
            position: relative;
            padding: 6px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ink-600);
            border-radius: 6px;
            transition: color .2s, background .2s;
        }

        .nav-link:hover {
            color: var(--brand-600);
            background: var(--brand-100);
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 14px;
            right: 14px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-600);
        }

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

        .activity-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent-600);
            background: #FEF2E8;
            padding: 4px 10px;
            border-radius: 999px;
        }

        .activity-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--red-500);
            position: relative;
        }

        .activity-badge .dot::before {
            content: '';
            position: absolute;
            inset: -3px;
            border-radius: 50%;
            background: var(--red-500);
            opacity: 0.4;
            animation: ping 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
        }

        @keyframes ping {
            0% { transform: scale(1); opacity: 0.5; }
            80%, 100% { transform: scale(2); opacity: 0; }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 8px;
            padding: 12px 24px;
            transition: all .2s;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--accent-500);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(249, 115, 22, 0.25);
        }

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

        .btn-outline {
            background: #fff;
            border-color: var(--brand-600);
            color: var(--brand-600);
        }

        .btn-outline:hover {
            background: var(--brand-100);
        }

        .btn-accent {
            background: var(--accent-500);
            color: #fff;
            border-radius: 999px;
        }

        .btn-accent:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid var(--line);
        }

        .mobile-toggle span {
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: var(--ink-900);
            transition: transform .3s, opacity .3s;
        }

        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--line);
            box-shadow: 0 8px 30px rgba(16, 42, 48, 0.1);
            padding: 16px 24px 24px;
            z-index: 99;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink-600);
            border-bottom: 1px solid #EEF3F5;
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

        .mobile-menu a.active {
            color: var(--brand-600);
            font-weight: 700;
        }

        .page-banner {
            padding-top: 72px;
            position: relative;
            background: linear-gradient(135deg, #EAF4F5 0%, #F5F9FA 60%, #FFFFFF 100%);
            border-bottom: 1px solid var(--line);
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            right: -10%;
            width: 400px;
            height: 400px;
            background: url('/assets/images/backpic/back-2.png') no-repeat center/cover;
            opacity: 0.12;
            border-radius: 50%;
        }

        .banner-content {
            position: relative;
            z-index: 2;
            padding: 56px 0 48px;
            text-align: center;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .banner-title {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink-900);
            margin-bottom: 12px;
        }

        .banner-subtitle {
            font-size: 18px;
            color: var(--ink-600);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .banner-meta {
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .banner-meta span {
            font-size: 13px;
            color: var(--ink-400);
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--line);
            padding: 4px 12px;
            border-radius: 999px;
        }

        .section {
            padding: 80px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--ink-900);
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--ink-600);
            max-width: 640px;
            line-height: 1.8;
        }

        .activity-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .activity-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 28px 24px;
            box-shadow: 0 1px 2px rgba(16, 42, 48, 0.06), 0 4px 12px rgba(16, 42, 48, 0.05);
            transition: transform .2s, box-shadow .2s;
            position: relative;
        }

        .activity-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(16, 42, 48, 0.1);
        }

        .activity-card .num {
            font-size: 13px;
            font-weight: 700;
            color: var(--brand-500);
            margin-bottom: 8px;
        }

        .activity-card .icon {
            width: 46px;
            height: 46px;
            border-radius: 10px;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-600);
            font-size: 20px;
            margin-bottom: 16px;
        }

        .activity-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 8px;
        }

        .activity-card p {
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.7;
        }

        .hot-section {
            background: var(--ink-900);
            padding: 80px 0;
            color: #fff;
        }

        .hot-section .section-title {
            color: #fff;
        }

        .hot-section .section-desc {
            color: #A7BCC3;
        }

        .hot-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .hot-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 16px;
            overflow: hidden;
            transition: transform .2s, background .2s;
        }

        .hot-card:hover {
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.12);
        }

        .hot-card-img {
            height: 160px;
            overflow: hidden;
        }

        .hot-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

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

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

        .hot-card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: #FBBF24;
            background: rgba(251, 191, 36, 0.15);
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 8px;
        }

        .hot-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .hot-card p {
            font-size: 13px;
            color: #A7BCC3;
            line-height: 1.6;
        }

        .hot-card .time {
            display: block;
            margin-top: 12px;
            font-size: 12px;
            color: #7D949C;
            font-variant-numeric: tabular-nums;
        }

        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .step-item {
            text-align: center;
            padding: 28px 20px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            position: relative;
        }

        .step-item .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--brand-600);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
        }

        .step-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--ink-600);
            line-height: 1.6;
        }

        .rules-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-top: 40px;
        }

        .rule-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 20px 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .rule-item .rule-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .rule-item h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--ink-900);
            margin-bottom: 4px;
        }

        .rule-item p {
            font-size: 13px;
            color: var(--ink-600);
            line-height: 1.6;
        }

        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 760px;
            margin: 40px auto 0;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow .2s;
        }

        .faq-item.active {
            box-shadow: 0 4px 16px rgba(16, 42, 48, 0.08);
            border-color: var(--brand-500);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-900);
            gap: 16px;
        }

        .faq-question .fa-chevron-down {
            font-size: 14px;
            color: var(--ink-400);
            transition: transform .2s;
            flex-shrink: 0;
        }

        .faq-item.active .fa-question? .fa-chevron-down {
            transform: rotate(180deg);
        }

        .faq-item.active .faq-question .fa-chevron-down {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
            background: var(--bg-100);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 4px 24px 18px;
            font-size: 14px;
            color: var(--ink-600);
            line-height: 1.8;
        }

        .cta-banner {
            background: linear-gradient(135deg, #0B728C 0%, #1495A3 100%);
            padding: 80px 0;
            color: #fff;
            text-align: center;
        }

        .cta-banner .countdown {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 999px;
            padding: 6px 18px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            font-variant-numeric: tabular-nums;
            letter-spacing: 1px;
        }

        .cta-banner h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-banner p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .cta-banner .btn-accent {
            font-size: 16px;
            padding: 14px 36px;
        }

        .site-footer {
            background: var(--ink-900);
            padding: 64px 0 0;
            color: #A7BCC3;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: #A7BCC3;
            margin-top: 12px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: #A7BCC3;
            padding: 5px 0;
            transition: color .2s, padding-left .2s;
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            font-size: 12px;
            color: #7D949C;
            flex-wrap: wrap;
            gap: 12px;
        }

        .back-to-top {
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: #A7BCC3;
            transition: color .2s;
        }

        .back-to-top:hover {
            color: #fff;
        }

        .float-cta {
            position: fixed;
            bottom: 24px;
            right: 24px;
            z-index: 50;
            display: flex;
            align-items: center;
            gap: 0;
        }

        .float-cta-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-500);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
            transition: transform .2s, box-shadow .2s;
        }

        .float-cta-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.5);
        }

        .float-cta-text {
            background: var(--accent-500);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 16px;
            border-radius: 999px;
            margin-right: 10px;
            opacity: 0;
            transform: translateX(10px);
            pointer-events: none;
            transition: opacity .2s, transform .2s;
            white-space: nowrap;
        }

        .float-cta:hover .float-cta-text {
            opacity: 1;
            transform: translateX(0);
        }

        .card-img-wrap {
            border-radius: 12px 12px 0 0;
            overflow: hidden;
            height: 170px;
        }

        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

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

        .badge-hot {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-500);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 999px;
            z-index: 2;
        }

        .pagination-links {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .pagination-links a, .pagination-links span {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--line);
            background: #fff;
            color: var(--ink-600);
            transition: all .2s;
        }

        .pagination-links a:hover {
            border-color: var(--brand-500);
            color: var(--brand-600);
        }

        .pagination-links .current {
            background: var(--brand-600);
            color: #fff;
            border-color: var(--brand-600);
        }

        @media (max-width: 1024px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hot-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .site-header {
                height: 64px;
            }
            .page-banner {
                padding-top: 64px;
            }
            .banner-title {
                font-size: 30px;
            }
            .banner-subtitle {
                font-size: 16px;
            }
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .activity-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .rules-grid {
                grid-template-columns: 1fr;
            }
            .hot-cards {
                grid-template-columns: 1fr;
            }
            .activity-badge {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .float-cta {
                bottom: 16px;
                right: 16px;
                left: 16px;
                justify-content: center;
            }
            .float-cta-btn {
                width: auto;
                height: 48px;
                border-radius: 999px;
                padding: 0 32px;
                font-size: 15px;
                font-weight: 600;
                box-shadow: 0 4px 16px rgba(249, 115, 22, 0.35);
            }
            .float-cta-text {
                display: none;
            }
            .activity-badge {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .banner-title {
                font-size: 26px;
            }
            .banner-content {
                padding: 40px 0 32px;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .activity-card {
                padding: 20px 18px;
            }
            .cta-banner h2 {
                font-size: 26px;
            }
            .cta-banner .countdown {
                font-size: 12px;
                padding: 5px 12px;
            }
        }

        .faq-item .faq-question i.fa-chevron-down {
            transition: transform .2s;
        }

        .faq-item.active .faq-question i.fa-chevron-down {
            transform: rotate(180deg);
        }