/* roulang page: index */
/* ===== Design Tokens ===== */
        :root {
            --bg: #F1F5F9;
            --surface: #FFFFFF;
            --primary: #1E5EFF;
            --primary-soft: #E8EFFF;
            --primary-dark: #0D47C4;
            --accent: #0E9F6E;
            --accent-soft: #E3F5EF;
            --ink: #1A2233;
            --ink-2: #566074;
            --ink-3: #94A3B8;
            --line: #E2E8F0;
            --panda-black: #111827;
            --radius-lg: 12px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, .08);
            --shadow-card-hover: 0 12px 32px rgba(15, 23, 42, .14);
            --transition: .2s ease;
            --container: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-variant-numeric: tabular-nums;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            display: block;
            max-width: 100%;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul {
            list-style: none;
        }

        /* ===== Layout Helpers ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 96px 0;
        }
        .section-tight {
            padding: 48px 0;
        }
        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 24px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .section-tag {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--ink);
        }
        .section-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
        }
        .section-link:hover {
            color: var(--primary-dark);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: 1.5px solid transparent;
            cursor: pointer;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 6px rgba(30, 94, 255, .28);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(30, 94, 255, .35);
        }
        .btn-primary:active {
            transform: scale(.98);
        }
        .btn-outline {
            background: var(--surface);
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: scale(.98);
        }
        .btn-white {
            background: #fff;
            color: var(--ink);
            border-color: transparent;
        }
        .btn-white:hover {
            background: var(--primary-soft);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: #0B7D54;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }

        /* ===== Image Placeholder ===== */
        .img-holder {
            position: relative;
            background-color: #E2E8F0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: block;
        }
        .img-holder .ph-icon {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 48px;
            height: 48px;
            opacity: .45;
            z-index: 1;
        }
        .img-holder img {
            position: relative;
            z-index: 2;
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* ===== Header / Topbar ===== */
        .topbar {
            background: var(--panda-black);
            color: rgba(255, 255, 255, .8);
            font-size: 12px;
            line-height: 36px;
            height: 36px;
            overflow: hidden;
        }
        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            height: 100%;
        }
        .topbar-brand {
            color: #fff;
            font-weight: 600;
            letter-spacing: .5px;
        }
        .topbar-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .topbar-actions a {
            color: rgba(255, 255, 255, .85);
            font-size: 12px;
            transition: color var(--transition);
        }
        .topbar-actions a:hover {
            color: #fff;
        }

        /* ===== Main Nav ===== */
        .main-nav {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            box-shadow: 0 1px 4px rgba(15, 23, 42, .06);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 72px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            text-decoration: none;
        }
        .logo-badge {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--panda-black);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            letter-spacing: -.5px;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.2;
        }
        .logo-text span {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-2);
            transition: all var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 3px;
            border-radius: 0 0 3px 3px;
            background: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 18px;
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Hero ===== */
        .hero {
            background: var(--surface);
            border-bottom: 1px solid var(--line);
            padding: 72px 0 64px;
            position: relative;
        }
        .hero-inner {
            display: grid;
            grid-template-columns: 6fr 6fr;
            gap: 48px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            background: var(--panda-black);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--ink);
            margin-bottom: 16px;
            letter-spacing: -.5px;
        }
        .hero-title em {
            font-style: normal;
            color: var(--primary);
        }
        .hero-sub {
            font-size: 17px;
            color: var(--ink-2);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px 32px;
            border-top: 1px solid var(--line);
            padding-top: 20px;
        }
        .hero-stats span {
            font-size: 14px;
            color: var(--ink-2);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-stats strong {
            font-size: 20px;
            color: var(--ink);
            font-weight: 700;
        }
        .hero-media {
            position: relative;
        }
        .hero-img {
            aspect-ratio: 1/1;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card-hover);
        }
        .hero-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-img::before {
            content: "";
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(0deg, rgba(17, 24, 39, .06) 0 2px, transparent 2px 100px),
                repeating-linear-gradient(90deg, rgba(17, 24, 39, .06) 0 2px, transparent 2px 100px);
            z-index: 3;
            pointer-events: none;
            border-radius: var(--radius-lg);
        }

        /* ===== Trust Bar ===== */
        .trustbar {
            background: var(--surface);
            border-top: 1px solid var(--line);
            padding: 14px 0;
        }
        .trustbar-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px 28px;
            font-size: 12px;
            color: var(--ink-3);
        }
        .trustbar-inner span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .trustbar-inner i {
            font-style: normal;
            color: var(--accent);
        }

        /* ===== Featured Section ===== */
        .featured-section {
            background: var(--bg);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 24px;
            margin-bottom: 24px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            position: relative;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .feature-card .card-media {
            aspect-ratio: 16/9;
        }
        .feature-card .card-media.is-4-3 {
            aspect-ratio: 4/3;
        }
        .feature-card .card-media img {
            transition: transform .35s ease;
        }
        .feature-card:hover .card-media img {
            transform: scale(1.04);
        }
        .feature-card .card-body {
            padding: 20px;
        }
        .feature-card .card-tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .feature-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.45;
            margin-bottom: 6px;
            transition: color var(--transition);
        }
        .feature-card:hover .card-title {
            color: var(--primary);
        }
        .feature-card .card-desc {
            font-size: 13px;
            color: var(--ink-2);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .feature-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .feature-card .card-link:hover {
            color: var(--primary-dark);
        }
        .feature-card-lg {
            position: relative;
        }
        .feature-card-lg .card-media {
            aspect-ratio: auto;
            min-height: 420px;
            display: flex;
            align-items: flex-end;
        }
        .feature-card-lg .card-media img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
        }
        .feature-card-lg .card-overlay {
            position: relative;
            z-index: 4;
            padding: 28px;
            background: linear-gradient(180deg, transparent 0%, rgba(17, 24, 39, .85) 72%);
            color: #fff;
            width: 100%;
        }
        .feature-card-lg .card-overlay .card-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .feature-card-lg .card-overlay .card-title {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .feature-card-lg .card-overlay .card-desc {
            color: rgba(255, 255, 255, .82);
            font-size: 14px;
            margin-bottom: 16px;
        }
        .feature-side {
            display: grid;
            gap: 24px;
        }
        .feature-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        /* ===== News Section ===== */
        .news-section {
            background: var(--surface);
        }
        .news-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .news-tabs .tab {
            background: var(--bg);
            color: var(--ink-2);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            cursor: default;
            border: 1px solid transparent;
            transition: all var(--transition);
        }
        .news-tabs .tab.active,
        .news-tabs .tab:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .news-list {
            display: flex;
            flex-direction: column;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 12px;
            border-bottom: 1px solid var(--line);
            transition: background var(--transition);
            border-radius: var(--radius-sm);
        }
        .news-item:first-child {
            padding-top: 8px;
        }
        .news-item:hover {
            background: var(--primary-soft);
        }
        .news-thumb {
            width: 80px;
            height: 80px;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            overflow: hidden;
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-content h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 4px;
        }
        .news-content h3 a {
            color: var(--ink);
            transition: color var(--transition);
        }
        .news-content h3 a:hover {
            color: var(--primary);
        }
        .news-content p {
            font-size: 13px;
            color: var(--ink-2);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 12px;
            color: var(--ink-3);
        }
        .news-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-meta .cat {
            color: var(--primary);
            font-weight: 600;
        }
        .news-more {
            text-align: center;
            margin-top: 32px;
        }
        .empty-state {
            text-align: center;
            padding: 48px 20px;
            color: var(--ink-3);
            font-size: 14px;
        }
        .empty-state .empty-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 12px;
            opacity: .5;
        }

        /* ===== Testimonials ===== */
        .testimonial-section {
            background: var(--bg);
        }
        .testimonial-panel {
            background: var(--primary-soft);
            border-radius: 24px;
            padding: 48px;
            position: relative;
        }
        .testimonial-track {
            position: relative;
            min-height: 200px;
        }
        .testimonial-slide {
            opacity: 0;
            visibility: hidden;
            transition: opacity .5s ease, visibility .5s ease;
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
        }
        .testimonial-slide.active {
            opacity: 1;
            visibility: visible;
            position: relative;
        }
        .testimonial-slide blockquote {
            font-size: 18px;
            font-weight: 500;
            line-height: 1.7;
            color: var(--ink);
            max-width: 720px;
            margin: 0 auto 16px;
            quotes: none;
        }
        .testimonial-slide cite {
            font-size: 13px;
            color: var(--ink-2);
            font-style: normal;
            display: block;
        }
        .testimonial-controls {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-top: 24px;
        }
        .testimonial-btn {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #fff;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(15, 23, 42, .1);
            transition: all var(--transition);
        }
        .testimonial-btn:hover {
            background: var(--primary);
            color: #fff;
        }
        .testimonial-dots {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        .testimonial-dots .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #CBD5E1;
            transition: all .3s ease;
            border: none;
        }
        .testimonial-dots .dot.active {
            background: var(--primary);
            width: 24px;
            border-radius: 999px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(30, 94, 255, .1);
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            transition: color var(--transition);
            width: 100%;
            text-align: left;
            background: transparent;
        }
        .faq-q:hover {
            color: var(--primary);
        }
        .faq-q .faq-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 600;
            transition: transform .3s ease, background var(--transition);
            flex-shrink: 0;
            line-height: 1;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-a {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            font-size: 14px;
            color: var(--ink-2);
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            padding: 0 20px 18px;
            max-height: 300px;
        }

        /* ===== CTA Dark Bar ===== */
        .cta-section {
            background: var(--bg);
        }
        .cta-box {
            background: var(--panda-black);
            border-radius: 16px;
            padding: 36px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 6px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, .7);
            font-size: 14px;
        }

        /* ===== Guarantee ===== */
        .guarantee-section {
            background: var(--surface);
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
            padding: 48px 0;
        }
        .guarantee-item {
            text-align: center;
            padding: 0 12px;
        }
        .guarantee-item .g-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
        }
        .guarantee-item h3 {
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 4px;
        }
        .guarantee-item p {
            font-size: 12px;
            color: var(--ink-3);
            line-height: 1.5;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--panda-black);
            color: rgba(255, 255, 255, .72);
            font-size: 14px;
        }
        .footer-top {
            padding: 64px 0 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 14px;
        }
        .footer-brand .brand-logo .logo-badge {
            background: #fff;
            color: var(--panda-black);
        }
        .footer-brand .brand-logo .logo-text {
            color: #fff;
        }
        .footer-brand .brand-logo .logo-text span {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            max-width: 320px;
            color: rgba(255, 255, 255, .58);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, .58);
            font-size: 13px;
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            font-size: 13px;
            color: rgba(255, 255, 255, .58);
            margin-bottom: 10px;
        }
        .footer-contact li svg {
            flex-shrink: 0;
            margin-top: 3px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding: 18px 0;
            font-size: 12px;
            color: rgba(255, 255, 255, .45);
        }
        .footer-bottom-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .6);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Icon Styles ===== */
        .ic {
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .section {
                padding: 64px 0;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-img {
                aspect-ratio: 16/10;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .feature-card-lg .card-media {
                min-height: 320px;
            }
            .feature-row {
                grid-template-columns: repeat(3, 1fr);
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .testimonial-panel {
                padding: 32px;
            }
            .news-thumb {
                width: 56px;
                height: 56px;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .section-head {
                margin-bottom: 24px;
            }
            .topbar-brand {
                display: none;
            }
            .topbar-inner {
                justify-content: space-between;
                font-size: 12px;
            }
            .nav-links {
                position: fixed;
                top: 108px;
                right: 0;
                width: 240px;
                background: var(--surface);
                box-shadow: -8px 0 32px rgba(15, 23, 42, .18);
                border-left: 1px solid var(--line);
                border-radius: 0 0 0 16px;
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 8px;
                transform: translateX(100%);
                transition: transform .3s ease;
                z-index: 200;
                height: auto;
            }
            .nav-links.open {
                transform: translateX(0);
            }
            .nav-links .nav-link {
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: var(--primary-soft);
            }
            .nav-toggle {
                display: inline-flex;
            }
            .hero {
                padding: 40px 0 36px;
                border-bottom: 1px solid var(--line);
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }
            .trustbar-inner {
                justify-content: flex-start;
                overflow-x: auto;
                flex-wrap: nowrap;
                padding: 10px 0;
            }
            .trustbar-inner span {
                white-space: nowrap;
            }
            .feature-grid {
                gap: 16px;
            }
            .feature-row {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card-lg .card-media {
                min-height: 260px;
            }
            .news-item {
                flex-direction: row;
                gap: 12px;
                padding: 14px 8px;
            }
            .news-thumb {
                width: 64px;
                height: 64px;
                border-radius: var(--radius-sm);
            }
            .news-content h3 {
                font-size: 15px;
            }
            .news-content p {
                font-size: 12px;
                -webkit-line-clamp: 2;
            }
            .news-meta {
                gap: 10px;
                font-size: 11px;
                flex-wrap: wrap;
            }
            .testimonial-panel {
                padding: 24px 20px;
                border-radius: 16px;
            }
            .testimonial-slide blockquote {
                font-size: 15px;
                line-height: 1.65;
            }
            .testimonial-controls {
                gap: 12px;
            }
            .testimonial-btn {
                width: 40px;
                height: 40px;
            }
            .cta-box {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 18px;
                border-radius: 12px;
            }
            .cta-box h2 {
                font-size: 20px;
            }
            .cta-box .btn {
                width: 100%;
            }
            .guarantee-grid {
                grid-template-columns: 1fr 1fr;
                padding: 32px 0;
                gap: 24px 12px;
            }
            .guarantee-item {
                padding: 0;
            }
            .footer-top {
                padding: 40px 0 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 24px;
            }
            .hero-actions .btn {
                padding: 11px 18px;
            }
            .news-thumb {
                width: 48px;
                height: 48px;
            }
            .feature-card-lg .card-media {
                min-height: 220px;
            }
            .feature-card-lg .card-overlay {
                padding: 18px;
            }
            .feature-card-lg .card-overlay .card-title {
                font-size: 18px;
            }
            .feature-card .card-body {
                padding: 16px;
            }
            .feature-card .card-title {
                font-size: 16px;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-item {
                display: flex;
                gap: 12px;
                text-align: left;
                align-items: center;
            }
            .guarantee-item .g-icon {
                margin-bottom: 0;
                flex-shrink: 0;
            }
        }

/* roulang page: category1 */
:root {
  --bg: #F1F5F9;
  --surface: #FFFFFF;
  --primary: #1E5EFF;
  --primary-soft: #E8EFFF;
  --primary-dark: #0D47C4;
  --accent: #0E9F6E;
  --accent-soft: #E3F5EF;
  --ink: #1A2233;
  --ink-2: #566074;
  --ink-3: #94A3B8;
  --line: #E2E8F0;
  --panda-black: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(15,23,42,.08);
  --shadow-hover: 0 12px 32px rgba(15,23,42,.14);
  --container: 1200px;
  --space: 96px;
  --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
ul, ol {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input, textarea, select {
  font-family: inherit;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  border-radius: 10px;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: 1.5px solid var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: scale(.98);
}
.btn-secondary {
  background: var(--surface);
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-secondary:hover {
  background: var(--primary-soft);
}
.btn-secondary:active {
  transform: scale(.98);
}
.btn-sm {
  padding: 9px 20px;
  font-size: 13px;
  border-radius: 8px;
}
.btn:focus-visible {
  outline: 3px solid rgba(30,94,255,.35);
  outline-offset: 2px;
}
.media {
  position: relative;
  overflow: hidden;
  background-color: #E2E8F0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='48' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M8 12h8M12 8v8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 48px;
}
.media > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar {
  background: var(--panda-black);
  height: 36px;
  display: flex;
  align-items: center;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.topbar-brand {
  color: rgba(255,255,255,.9);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .03em;
}
.topbar-actions {
  display: flex;
  gap: 20px;
}
.topbar-actions a {
  color: rgba(255,255,255,.85);
  font-size: 12px;
  transition: color .2s;
}
.topbar-actions a:hover {
  color: #fff;
}
.main-nav {
  background: var(--surface);
  height: 72px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 1px 4px rgba(15,23,42,.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-badge {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--panda-black);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
}
.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .01em;
  line-height: 1.2;
}
.logo-text span {
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: 8px;
  transition: all .2s ease;
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-soft);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--surface);
  transition: all .2s;
}
.nav-toggle:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
.nav-toggle.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
main {
  display: block;
}
.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 44px 0 40px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb-sep {
  width: 14px;
  height: 14px;
  opacity: .5;
}
.breadcrumb .current {
  color: var(--ink);
  font-weight: 500;
}
.page-hero h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 12px;
  letter-spacing: -.01em;
}
.page-hero-desc {
  font-size: 15px;
  color: var(--ink-2);
  max-width: 760px;
  line-height: 1.8;
  margin-bottom: 26px;
}
.page-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-banner {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  padding: 80px 0;
}
.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(17,24,39,.45);
}
.hero-banner .container {
  position: relative;
  z-index: 2;
}
.hero-banner-tag {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.3);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.hero-banner-title {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 12px;
}
.hero-banner-desc {
  font-size: 16px;
  color: rgba(255,255,255,.92);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 26px;
}
.stats-section {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 10px 0;
}
.stat-item strong {
  display: block;
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-item span {
  font-size: 14px;
  color: var(--ink-2);
}
.events-section,
.scenario-section,
.process-section,
.faq-section {
  padding: 96px 0;
}
.section-head {
  margin-bottom: 40px;
  max-width: 720px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 15px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 10px;
}
.section-head p {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.8;
}
.events-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}
.event-card-large {
  grid-column: span 7;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease;
}
.event-card-large:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.event-card-large .media {
  height: 320px;
}
.event-card-large .event-card-body {
  padding: 28px;
}
.event-card-large h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
  transition: color .2s;
}
.event-card-large p {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.75;
}
.event-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  transition: transform .25s ease, box-shadow .25s ease;
}
.event-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.event-card .event-card-body {
  padding: 20px;
}
.event-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  transition: color .2s;
}
.event-card:hover h3 {
  color: var(--primary);
}
.event-card p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
}
.event-card .badge {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}
.event-card .media {
  height: 180px;
}
.events-stack {
  grid-column: span 5;
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 24px;
}
.events-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.events-row .event-card:nth-child(2) {
  transform: translateY(-24px);
}
.events-row .event-card:nth-child(2):hover {
  transform: translateY(-28px);
}
.event-card-link {
  display: block;
  position: relative;
}
.scenario-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
  align-items: center;
}
.scenario-media {
  grid-column: span 5;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 360px;
}
.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.scenario-content {
  grid-column: span 7;
  padding-left: 20px;
}
.scenario-content h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 14px;
}
.scenario-content > p {
  font-size: 15px;
  color: var(--ink-2);
  margin-bottom: 28px;
  max-width: 560px;
}
.scenario-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 28px;
}
.scenario-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.scenario-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary-soft);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.scenario-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 3px;
}
.scenario-item p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
}
.process-section {
  background: var(--bg);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.process-step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px 24px;
  box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.process-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.process-step p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
}
.process-step::after {
  content: "";
  position: absolute;
  top: 48px;
  right: -16px;
  width: 8px;
  height: 8px;
  border-top: 1.5px solid var(--ink-3);
  border-right: 1.5px solid var(--ink-3);
  transform: rotate(45deg);
  opacity: .6;
}
.process-step:last-child::after {
  display: none;
}
.faq-section {
  background: var(--surface);
}
.faq-list {
  max-width: 860px;
  margin: 40px auto 0;
  display: grid;
  gap: 16px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s;
}
.faq-item.active {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.faq-title {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  background: none;
  transition: color .2s;
}
.faq-title:hover {
  color: var(--primary);
}
.faq-icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--ink-3);
  border-radius: 2px;
  transition: all .25s ease;
}
.faq-icon::before {
  left: 1px;
  right: 1px;
  top: 8px;
  height: 2px;
}
.faq-icon::after {
  top: 1px;
  bottom: 1px;
  left: 8px;
  width: 2px;
}
.faq-item.active .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0;
}
.faq-item.active .faq-icon::before {
  background: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
  padding: 0 22px;
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.85;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 22px 18px;
}
.cta-section {
  padding: 48px 24px;
  background: var(--bg);
}
.cta-box {
  max-width: var(--container);
  margin: 0 auto;
  background: var(--panda-black);
  border-radius: 16px;
  padding: 42px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-box h2 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.cta-box p {
  font-size: 13px;
  color: rgba(255,255,255,.75);
}
.cta-box .btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  flex-shrink: 0;
}
.cta-box .btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}
.site-footer {
  background: var(--panda-black);
  color: rgba(255,255,255,.75);
}
.footer-top {
  padding: 64px 0 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
}
.footer-brand .brand-logo .logo-badge {
  background: #fff;
  color: var(--panda-black);
}
.footer-brand .logo-text {
  color: #fff;
}
.footer-brand .logo-text span {
  color: var(--accent);
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.85;
  margin-top: 18px;
  max-width: 320px;
  color: rgba(255,255,255,.65);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255,255,255,.65);
  margin-bottom: 12px;
  transition: color .2s, padding-left .2s;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact {
  display: grid;
  gap: 12px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,.65);
  line-height: 1.6;
}
.footer-contact svg {
  flex-shrink: 0;
  color: var(--accent);
}
.footer-bottom {
  padding: 22px 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: rgba(255,255,255,.5);
}
@media (max-width: 1023px) {
  :root {
    --space: 64px;
  }
  .events-section,
  .scenario-section,
  .process-section,
  .faq-section {
    padding: var(--space) 0;
  }
  .event-card-large {
    grid-column: span 12;
  }
  .event-card-large .media {
    height: 360px;
  }
  .events-stack {
    grid-column: span 12;
    grid-template-rows: none;
    grid-template-columns: 1fr 1fr;
  }
  .events-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .events-row .event-card:nth-child(2) {
    transform: none;
  }
  .events-row .event-card:nth-child(2):hover {
    transform: translateY(-4px);
  }
  .events-row .event-card:nth-child(3) {
    grid-column: span 2;
  }
  .scenario-media {
    grid-column: span 12;
    min-height: 300px;
  }
  .scenario-content {
    grid-column: span 12;
    padding-left: 0;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-step::after {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-item strong {
    font-size: 28px;
  }
}
@media (max-width: 767px) {
  :root {
    --space: 48px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .topbar-actions a:first-child {
    display: none;
  }
  .main-nav {
    height: 64px;
  }
  .nav-links {
    position: fixed;
    top: 36px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 32px 24px;
    gap: 6px;
    transform: translateY(-140%);
    transition: transform .3s ease;
    z-index: -1;
    box-shadow: 0 20px 40px rgba(15,23,42,.12);
    overflow-y: auto;
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-link {
    height: 56px;
    font-size: 18px;
    padding: 0 16px;
    border-radius: 8px;
  }
  .nav-link.active::after {
    display: none;
  }
  .nav-link.active {
    background: var(--primary-soft);
  }
  .nav-actions .btn {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .page-hero {
    padding: 32px 0 28px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .page-hero-desc {
    font-size: 14px;
  }
  .page-hero-actions .btn {
    width: 100%;
  }
  .hero-banner {
    min-height: 380px;
    padding: 56px 0;
  }
  .hero-banner-title {
    font-size: 28px;
  }
  .hero-banner-desc {
    font-size: 14px;
  }
  .hero-banner .btn {
    width: 100%;
  }
  .stats-section {
    padding: 28px 0;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .stat-item strong {
    font-size: 26px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .event-card-large .event-card-body {
    padding: 20px;
  }
  .event-card-large .media {
    height: 220px;
  }
  .event-card-large h3 {
    font-size: 20px;
  }
  .events-stack {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .events-row {
    grid-template-columns: 1fr;
    margin-top: 16px;
  }
  .events-row .event-card:nth-child(3) {
    grid-column: span 1;
  }
  .events-grid {
    gap: 16px;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .scenario-media {
    min-height: 240px;
  }
  .scenario-content h2 {
    font-size: 24px;
  }
  .scenario-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .process-step {
    padding: 22px 20px;
  }
  .cta-box {
    padding: 28px 24px;
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-box .btn {
    width: 100%;
  }
  .footer-top {
    padding: 48px 0 28px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand p {
    max-width: none;
  }
  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }
  .faq-title {
    padding: 15px 16px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 16px;
    font-size: 13px;
  }
  .faq-item.active .faq-answer {
    padding: 0 16px 16px;
  }
  .section-head {
    margin-bottom: 28px;
  }
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root {
  --bg: #F1F5F9;
  --surface: #FFFFFF;
  --primary: #1E5EFF;
  --primary-soft: #E8EFFF;
  --primary-dark: #0D47C4;
  --accent: #0E9F6E;
  --accent-soft: #E3F5EF;
  --ink: #1A2233;
  --ink-2: #566074;
  --ink-3: #94A3B8;
  --line: #E2E8F0;
  --panda-black: #111827;
  --panda-gray: #94A3B8;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow: 0 1px 3px rgba(15,23,42,.08);
  --shadow-hover: 0 12px 32px rgba(15,23,42,.14);
  --transition: .2s ease;
  --panda-placeholder: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 64 64'%3E%3Ccircle cx='18' cy='34' r='10' fill='%2394A3B8'/%3E%3Ccircle cx='46' cy='34' r='10' fill='%2394A3B8'/%3E%3Ccircle cx='32' cy='35' r='16' fill='%23FFFFFF'/%3E%3Ccircle cx='25' cy='32' r='5' fill='%2394A3B8'/%3E%3Ccircle cx='39' cy='32' r='5' fill='%2394A3B8'/%3E%3Ccircle cx='23' cy='29' r='1.5' fill='%23FFFFFF'/%3E%3Ccircle cx='37' cy='29' r='1.5' fill='%23FFFFFF'/%3E%3Cellipse cx='32' cy='42' rx='3' ry='2' fill='%2394A3B8'/%3E%3C/svg%3E");
}

/* ============ Reset / Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
:focus-visible { outline: 3px solid rgba(30, 94, 255, .35); outline-offset: 2px; }

/* ============ Container ============ */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 10px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; border: 1.5px solid var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 16px rgba(30,94,255,.25); }
.btn-primary:active { transform: scale(.98); }
.btn-secondary { background: var(--surface); color: var(--primary); border: 1.5px solid var(--primary); }
.btn-secondary:hover { background: var(--primary-soft); transform: translateY(-2px); }
.btn-secondary:active { transform: scale(.98); }
.btn-sm { padding: 8px 18px; font-size: 13px; border-radius: 8px; }

/* ============ Header ============ */
.site-header { background: var(--surface); }
.topbar { background: var(--panda-black); min-height: 36px; display: flex; align-items: center; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; min-height: 36px; }
.topbar-brand { font-size: 12px; color: rgba(255,255,255,.78); letter-spacing: .04em; }
.topbar-actions a { font-size: 12px; color: rgba(255,255,255,.88); margin-left: 24px; transition: color var(--transition); }
.topbar-actions a:hover { color: #fff; }

.main-nav { background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: 0 1px 4px rgba(15,23,42,.06); position: sticky; top: 0; z-index: 100; }
.nav-inner { display: flex; align-items: center; height: 72px; gap: 32px; }
.brand-logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-badge {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--panda-black); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800; letter-spacing: .02em;
}
.logo-text { font-size: 22px; font-weight: 800; color: var(--ink); letter-spacing: .02em; }
.logo-text span { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 6px; flex: 1; }
.nav-link {
  display: inline-flex; align-items: center;
  font-size: 15px; font-weight: 500; color: var(--ink-2);
  padding: 8px 16px; border-radius: 8px; position: relative;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover { color: var(--primary); background: var(--primary-soft); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
  content: ''; position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 3px; border-radius: 3px; background: var(--primary);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; border-radius: 8px; color: var(--ink); }
.nav-toggle:hover { background: var(--primary-soft); color: var(--primary); }

/* ============ 面包屑 ============ */
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.breadcrumb a { color: var(--ink-3); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--ink-3); opacity: .6; }
.breadcrumb-current {
  color: var(--ink); max-width: 300px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ============ 文章头部 ============ */
.article-header { background: var(--surface); border-bottom: 1px solid var(--line); padding: 40px 0 36px; }
.article-title { font-size: 32px; font-weight: 700; line-height: 1.3; margin-bottom: 16px; letter-spacing: .01em; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; font-size: 13px; color: var(--ink-3); }
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-meta svg { opacity: .7; }

/* ============ 文章主体 ============ */
.article-main { max-width: 860px; margin: 32px auto 48px; padding: 0 24px; }
.article-card {
  background: var(--surface); border-radius: 16px; box-shadow: var(--shadow);
  padding: 48px; border: 1px solid rgba(226,232,240,.6);
}
.article-body { font-size: 16px; line-height: 1.8; color: var(--ink); }
.article-body p { margin-bottom: 1.2em; }
.article-body h2 { font-size: 24px; font-weight: 700; line-height: 1.4; margin: 1.6em 0 .6em; padding-left: 14px; border-left: 4px solid var(--primary); }
.article-body h3 { font-size: 20px; font-weight: 600; margin: 1.5em 0 .5em; color: var(--ink); }
.article-body h4 { font-size: 17px; font-weight: 600; margin: 1.3em 0 .4em; }
.article-body a { color: var(--primary); border-bottom: 1px solid transparent; }
.article-body a:hover { border-bottom-color: var(--primary); }
.article-body blockquote {
  border-left: 4px solid var(--primary); background: var(--primary-soft);
  border-radius: 8px; padding: 16px 24px; margin: 1.5em 0; color: var(--ink-2);
}
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body img { max-width: 100%; border-radius: 12px; height: auto; margin: 1.5em auto; background-color: #E2E8F0; background-image: var(--panda-placeholder); background-repeat: no-repeat; background-position: center; background-size: 48px; }
.article-body ul, .article-body ol { margin: 1em 0 1.2em; padding-left: 1.6em; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: .4em; }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 14px; }
.article-body th { background: var(--primary-soft); font-weight: 600; text-align: left; padding: 10px 14px; border: 1px solid var(--line); }
.article-body td { padding: 10px 14px; border: 1px solid var(--line); }
.article-body code { background: var(--primary-soft); color: var(--primary-dark); border-radius: 4px; padding: 2px 6px; font-size: .92em; }

/* 内容未找到 */
.content-not-found { text-align: center; padding: 80px 20px; }
.content-not-found .nf-icon { width: 64px; height: 64px; margin: 0 auto 20px; opacity: .5; }
.content-not-found p { font-size: 18px; font-weight: 600; color: var(--ink-2); margin-bottom: 24px; }

/* ============ 文章底部 ============ */
.article-footer-bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 16px; margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--line);
}
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex; align-items: center; font-size: 12px; font-weight: 600;
  color: var(--primary); background: var(--primary-soft);
  padding: 4px 14px; border-radius: 999px; transition: background var(--transition), color var(--transition);
}
.tag:hover { background: var(--primary); color: #fff; }
.article-share { display: flex; align-items: center; gap: 8px; }
.share-btn {
  width: 38px; height: 38px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary-soft); color: var(--primary);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.share-btn:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ============ 相关推荐 ============ */
.related-section { padding: 16px 0 64px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 32px; }
.section-head h2 { font-size: 28px; font-weight: 700; line-height: 1.3; }
.section-head p { font-size: 14px; color: var(--ink-3); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--surface); border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--line);
  transition: box-shadow var(--transition), transform var(--transition);
}
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.related-thumb {
  display: block; aspect-ratio: 16/9; overflow: hidden; position: relative;
  background-color: #E2E8F0; background-image: var(--panda-placeholder); background-repeat: no-repeat; background-position: center; background-size: 48px;
}
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.related-card:hover .related-thumb img { transform: scale(1.04); }
.related-body { padding: 20px; }
.related-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 2px 10px; border-radius: 999px; margin-bottom: 10px; }
.related-body h3 { font-size: 18px; font-weight: 600; line-height: 1.45; margin-bottom: 8px; }
.related-body h3 a { transition: color var(--transition); }
.related-body h3 a:hover { color: var(--primary); }
.related-body p { font-size: 13px; color: var(--ink-2); line-height: 1.7; }

/* ============ CTA ============ */
.cta-section { padding: 0 0 64px; }
.cta-bar {
  background: var(--panda-black); border-radius: 16px; padding: 36px 48px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.cta-bar h3 { font-size: 24px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.cta-bar p { font-size: 13px; color: rgba(255,255,255,.66); }
.cta-bar .btn { flex-shrink: 0; }
.cta-back { display: flex; justify-content: center; margin-top: 24px; }

/* ============ Footer ============ */
.site-footer { background: var(--panda-black); color: #CBD5E1; padding-top: 56px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .brand-logo { margin-bottom: 14px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-text span { color: var(--primary); }
.footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.55); max-width: 320px; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; color: rgba(255,255,255,.55); padding: 4px 0; transition: color var(--transition), padding-left var(--transition); }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 8px; font-size: 13px; color: rgba(255,255,255,.55); line-height: 1.6; }
.footer-contact svg { flex-shrink: 0; margin-top: 2px; opacity: .7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: rgba(255,255,255,.4); }

/* ============ 响应式 ============ */
@media (max-width: 1023px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .article-header { padding: 28px 0 24px; }
  .article-title { font-size: 28px; }
  .article-card { padding: 36px; }
}

@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .topbar-actions a:first-child { display: none; }
  .nav-inner { height: 64px; gap: 12px; }
  .nav-links {
    position: fixed; top: 0; left: 0; right: 0; height: 100vh;
    background: var(--surface); flex-direction: column; justify-content: center; gap: 8px;
    transform: translateY(-100%); transition: transform .3s ease; z-index: 999;
    padding: 80px 24px 40px; display: flex;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-link { font-size: 18px; padding: 14px 20px; width: 100%; justify-content: center; }
  .nav-link.active::after { display: none; }
  .nav-toggle { display: inline-flex; position: relative; z-index: 1000; }
  .nav-toggle.active { color: var(--primary); }
  .nav-actions .btn { display: none; }
  .article-title { font-size: 24px; }
  .article-meta { gap: 12px; font-size: 12px; }
  .article-card { padding: 24px 20px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 20px; }
  .article-body h3 { font-size: 18px; }
  .article-footer-bar { flex-direction: column; align-items: flex-start; }
  .article-share { align-self: flex-end; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-bar { padding: 28px 24px; flex-direction: column; align-items: flex-start; }
  .cta-bar .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; padding-bottom: 32px; }
  .footer-bottom-inner { flex-direction: column; gap: 8px; text-align: center; }
  .breadcrumb-current { max-width: 160px; }
}

@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .article-meta span:last-child { display: none; }
  .cta-bar h3 { font-size: 20px; }
}