/* roulang page: index */
:root {
            --brand-500: #1F7A9E;
            --brand-600: #186581;
            --brand-700: #125069;
            --brand-100: #E5F1F6;
            --brand-50: #F0F7FA;
            --accent-500: #F28B3A;
            --accent-600: #DD7426;
            --bg: #F3F7FA;
            --surface: #FFFFFF;
            --text-primary: #172A33;
            --text-secondary: #4A6572;
            --text-tertiary: #849AA6;
            --border: rgba(23, 42, 51, 0.08);
            --success: #2E9E6B;
            --warning: #F5A623;
            --danger: #D64545;
            --shadow-sm: 0 2px 8px rgba(31, 122, 158, 0.06);
            --shadow-md: 0 4px 16px rgba(31, 122, 158, 0.08);
            --shadow-lg: 0 8px 28px rgba(31, 122, 158, 0.14);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-full: 999px;
            --container: 1200px;
            --header-h: 72px;
        }

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

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: var(--brand-500);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid rgba(242, 139, 58, 0.5);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        .section {
            padding: 96px 0;
        }

        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 24px;
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            letter-spacing: .02em;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: .01em;
            color: var(--text-primary);
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-top: 8px;
            max-width: 640px;
        }

        .view-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-500);
            white-space: nowrap;
            transition: gap .2s ease;
        }

        .view-more:hover {
            gap: 10px;
            color: var(--brand-600);
        }

        .btn-primary,
        .btn-secondary,
        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 32px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all .22s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent-500);
            color: #fff;
            box-shadow: 0 4px 14px rgba(242, 139, 58, 0.25);
        }

        .btn-primary:hover {
            background: var(--accent-600);
            box-shadow: 0 6px 20px rgba(242, 139, 58, 0.35);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            background: transparent;
            color: var(--brand-500);
            border: 1.5px solid var(--brand-500);
        }

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

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

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

        .badge {
            display: inline-flex;
            align-items: center;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 12px;
            border-radius: var(--radius-full);
            letter-spacing: .02em;
        }

        .badge-hot {
            background: rgba(242, 139, 58, 0.12);
            color: var(--accent-600);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
        }

        .header-inner {
            height: var(--header-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: .01em;
            white-space: nowrap;
        }

        .logo svg {
            flex-shrink: 0;
        }

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

        .logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--brand-100), var(--brand-500));
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

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

        .nav-item {
            position: relative;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: color .2s ease, background .2s ease;
        }

        .nav-item:hover {
            color: var(--brand-500);
            background: var(--brand-50);
        }

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

        .nav-item.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            background: var(--brand-500);
            border-radius: var(--radius-full);
        }

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

        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 22px;
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-600);
            background: transparent;
            border: 1.5px solid var(--brand-500);
            border-radius: var(--radius-sm);
            transition: all .22s ease;
            white-space: nowrap;
        }

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

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text-primary);
        }

        .menu-toggle:hover {
            background: var(--brand-50);
        }

        .mobile-menu {
            display: none;
        }

        /* ===== Mobile tab bar ===== */
        .mobile-tabbar {
            display: none;
        }

        /* ===== Hero ===== */
        .hero {
            background: linear-gradient(135deg, #E8F4F9 0%, #F3F7FA 100%);
            padding: 80px 0 72px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -120px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(31, 122, 158, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: 10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(242, 139, 58, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 64px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
            box-shadow: var(--shadow-sm);
        }

        .hero-badge svg {
            color: var(--success);
        }

        .hero h1 {
            font-size: clamp(42px, 5vw, 56px);
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: .01em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .hero-sub {
            font-size: 18px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 520px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 40px;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .hero-points li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .hero-points svg {
            color: var(--brand-500);
            flex-shrink: 0;
        }

        .hero-visual {
            position: relative;
        }

        .hero-visual img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
        }

        .hero-float-card {
            position: absolute;
            bottom: 24px;
            left: -20px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .hero-float-card .float-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .hero-float-card .float-text {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .hero-float-card .float-text small {
            display: block;
            font-size: 11px;
            color: var(--text-tertiary);
            font-weight: 400;
        }

        /* ===== Trust bar ===== */
        .trust-bar {
            background: var(--brand-100);
            border-bottom: 1px solid var(--border);
        }

        .trust-bar .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            padding-top: 24px;
            padding-bottom: 24px;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 12px;
            justify-content: center;
        }

        .trust-item svg {
            width: 28px;
            height: 28px;
            color: var(--brand-500);
            flex-shrink: 0;
        }

        .trust-item span {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
        }

        /* ===== Hot grid ===== */
        .hot-grid .section-head {
            margin-bottom: 40px;
        }

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

        .hot-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: transform .25s ease, box-shadow .25s ease;
            display: flex;
            flex-direction: column;
        }

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

        .hot-card-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .hot-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .35s ease;
        }

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

        .hot-card-cover .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 1;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            box-shadow: var(--shadow-sm);
        }

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

        .hot-card-body h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .hot-card-body h3 a {
            color: var(--text-primary);
        }

        .hot-card-body h3 a:hover {
            color: var(--brand-600);
        }

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

        .hot-card-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-500);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }

        .hot-card-link:hover {
            gap: 8px;
            color: var(--brand-600);
        }

        /* ===== Latest list ===== */
        .latest-section {
            background: var(--bg);
        }

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

        .latest-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 16px;
            display: flex;
            gap: 20px;
            align-items: stretch;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .25s ease, transform .25s ease;
        }

        .latest-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .latest-thumb {
            width: 150px;
            min-height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .latest-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 16 / 9;
            transition: transform .3s ease;
        }

        .latest-item:hover .latest-thumb img {
            transform: scale(1.04);
        }

        .latest-info {
            display: flex;
            flex-direction: column;
            flex: 1;
            min-width: 0;
        }

        .latest-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 6px;
        }

        .latest-meta time {
            font-size: 12px;
            color: var(--text-tertiary);
        }

        .latest-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .latest-title a {
            color: var(--text-primary);
        }

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

        .latest-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .view-detail {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 500;
            color: var(--brand-500);
            margin-top: 8px;
        }

        .view-detail:hover {
            gap: 8px;
            color: var(--brand-600);
        }

        .empty-state {
            border: 2px dashed rgba(31, 122, 158, 0.2);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
            background: rgba(255, 255, 255, 0.7);
        }

        .empty-state svg {
            width: 40px;
            height: 40px;
            color: var(--text-tertiary);
            margin: 0 auto 12px;
        }

        .empty-state p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 16px;
        }

        .empty-state .btn-secondary {
            height: 38px;
            padding: 0 20px;
            font-size: 13px;
        }

        /* ===== Reviews ===== */
        .reviews-section {
            background: linear-gradient(180deg, var(--bg) 0%, var(--brand-50) 100%);
        }

        .reviews-carousel {
            max-width: 760px;
            margin: 0 auto;
            position: relative;
        }

        .carousel-window {
            overflow: hidden;
            border-radius: var(--radius-lg);
        }

        .carousel-track {
            display: flex;
            transition: transform .35s ease;
        }

        .carousel-item {
            min-width: 100%;
            padding: 8px;
        }

        .review-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            text-align: center;
            box-shadow: var(--shadow-md);
        }

        .review-card .avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 18px;
            font-weight: 600;
        }

        .review-card .stars {
            display: flex;
            justify-content: center;
            gap: 4px;
            margin-bottom: 16px;
            color: var(--accent-500);
        }

        .review-card .stars svg {
            width: 18px;
            height: 18px;
            fill: currentColor;
        }

        .review-card blockquote {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 16px;
            font-style: normal;
        }

        .review-card .reviewer-name {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
        }

        .carousel-controls {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            margin-top: 28px;
        }

        .carousel-arrow {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            border: 1px solid var(--border);
            background: var(--surface);
            color: var(--brand-500);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .22s ease;
        }

        .carousel-arrow:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .carousel-arrow:active {
            transform: scale(0.95);
        }

        .carousel-dots {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .carousel-dot {
            width: 8px;
            height: 8px;
            border-radius: var(--radius-full);
            background: rgba(31, 122, 158, 0.2);
            transition: background .25s ease, width .25s ease;
        }

        .carousel-dot.active {
            width: 26px;
            background: var(--brand-500);
        }

        /* ===== Guarantee ===== */
        .guarantee-section {
            background: var(--surface);
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: left;
        }

        .guarantee-item {
            padding: 8px 0;
        }

        .guarantee-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: var(--brand-50);
            color: var(--brand-500);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .guarantee-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .guarantee-item p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background-image: linear-gradient(to right, rgba(31, 122, 158, 0.88), rgba(24, 101, 129, 0.82)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 72px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.75;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }

        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 8px;
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            color: var(--text-primary);
            transition: color .2s ease;
            background: transparent;
        }

        .faq-question:hover {
            color: var(--brand-600);
        }

        .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform .3s ease, background .3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-500);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-answer-inner {
            padding: 0 8px 22px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-secondary);
        }

        .faq-item.active .faq-answer {
            max-height: 280px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #F8FBFD;
            border-top: 1px solid var(--border);
        }

        .footer-main {
            padding: 64px 0 40px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
            gap: 40px;
        }

        .footer-brand .logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: .02em;
        }

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: all .2s ease;
        }

        .footer-col ul a:hover {
            color: var(--brand-600);
            padding-left: 4px;
        }

        .footer-tip {
            font-size: 13px;
            line-height: 1.75;
            color: var(--text-tertiary);
            background: var(--brand-50);
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--brand-500);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-tertiary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .section {
                padding: 64px 0;
            }

            .menu-toggle {
                display: flex;
            }

            .main-nav,
            .btn-login {
                display: none;
            }

            .mobile-menu {
                display: block;
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--surface);
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                padding: 16px 24px 24px;
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all .3s ease;
                z-index: 99;
            }

            .mobile-menu.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .mobile-menu .mobile-nav-item {
                display: flex;
                align-items: center;
                height: 48px;
                font-size: 15px;
                font-weight: 500;
                color: var(--text-secondary);
                border-radius: var(--radius-sm);
                padding: 0 12px;
            }

            .mobile-menu .mobile-nav-item:hover {
                background: var(--brand-50);
                color: var(--brand-600);
            }

            .mobile-menu .mobile-nav-item.active {
                color: var(--brand-600);
                background: var(--brand-100);
            }

            .mobile-menu .mobile-login-btn {
                display: flex;
                align-items: center;
                justify-content: center;
                height: 44px;
                margin-top: 12px;
                border: 1.5px solid var(--brand-500);
                border-radius: var(--radius-sm);
                color: var(--brand-600);
                font-size: 14px;
                font-weight: 500;
            }

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

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

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

        @media (max-width: 767px) {
            :root {
                --header-h: 56px;
            }

            .site-header {
                height: var(--header-h);
            }

            .header-inner {
                height: var(--header-h);
                padding-left: 16px;
                padding-right: 16px;
            }

            .logo {
                font-size: 17px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                border-radius: 8px;
            }

            .section {
                padding: 48px 0;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 28px;
            }

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

            .hero {
                padding: 48px 0 56px;
            }

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

            .hero h1 {
                font-size: 32px;
            }

            .hero-sub {
                font-size: 16px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
            }

            .hero-points {
                gap: 12px;
            }

            .hero-float-card {
                left: 12px;
                bottom: 16px;
                padding: 10px 14px;
            }

            .trust-bar .container {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                padding-top: 20px;
                padding-bottom: 20px;
            }

            .trust-item {
                justify-content: flex-start;
            }

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

            .latest-item {
                flex-direction: column;
                padding: 12px;
            }

            .latest-thumb {
                width: 100%;
                aspect-ratio: 16 / 7;
                min-height: 0;
            }

            .carousel-controls {
                gap: 16px;
            }

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

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

            .footer-main {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-top: 40px;
            }

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

            .footer-bottom .icp {
                order: -1;
            }

            .mobile-tabbar {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                height: calc(64px + env(safe-area-inset-bottom));
                padding-bottom: env(safe-area-inset-bottom);
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(8px);
                -webkit-backdrop-filter: blur(8px);
                border-top: 1px solid var(--border);
                z-index: 100;
                box-shadow: 0 -2px 12px rgba(31, 122, 158, 0.06);
            }

            .tab-item {
                flex: 1;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 4px;
                color: var(--text-tertiary);
                font-size: 11px;
                font-weight: 500;
                transition: color .2s ease;
            }

            .tab-item svg {
                width: 24px;
                height: 24px;
                color: currentColor;
                transition: color .2s ease;
            }

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

            .tab-item.active {
                color: var(--brand-500);
            }

            .tab-item.active svg {
                color: var(--brand-500);
            }

            body {
                padding-bottom: calc(64px + env(safe-area-inset-bottom));
            }

            .menu-toggle {
                display: flex;
            }
        }

        @media (max-width: 400px) {
            .hero h1 {
                font-size: 28px;
            }

            .hero-float-card {
                display: none;
            }

            .trust-item span {
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
            --brand-500: #1F7A9E;
            --brand-600: #186581;
            --brand-100: #E5F1F6;
            --brand-50: #F0F7FA;
            --accent-500: #F28B3A;
            --accent-600: #DD7426;
            --bg: #F3F7FA;
            --surface: #FFFFFF;
            --text-primary: #172A33;
            --text-secondary: #4A6572;
            --text-tertiary: #849AA6;
            --border: rgba(23, 42, 51, 0.08);
            --success: #2E9E6B;
            --danger: #D64545;
            --warning: #F5A623;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(31, 122, 158, 0.08);
            --shadow-hover: 0 8px 28px rgba(31, 122, 158, 0.14);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--brand-500);
            text-decoration: none;
            transition: color .2s;
        }

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

        a:focus-visible {
            outline: 2px solid rgba(242, 139, 58, 0.5);
            outline-offset: 2px;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header ===== */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            height: 72px;
        }

        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .logo:hover {
            color: var(--brand-500);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--brand-100);
            border-radius: 10px;
            color: var(--brand-500);
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-item {
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            transition: color .2s, background .2s;
        }

        .nav-item:hover {
            color: var(--brand-500);
            background: var(--brand-50);
        }

        .nav-item.active {
            color: var(--brand-500);
            font-weight: 600;
        }

        .nav-item.active::after {
            content: "";
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--brand-500);
            border-radius: 2px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            transition: all .25s;
            border: 2px solid transparent;
            line-height: 1.4;
        }

        .btn:active {
            transform: scale(0.98);
        }

        .btn-primary {
            background: var(--accent-500);
            color: #fff;
            box-shadow: 0 2px 8px rgba(242, 139, 58, 0.2);
        }

        .btn-primary:hover {
            background: var(--accent-600);
            color: #fff;
            box-shadow: 0 4px 14px rgba(242, 139, 58, 0.3);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--brand-500);
            color: var(--brand-500);
        }

        .btn-outline:hover {
            background: var(--brand-50);
            color: var(--brand-600);
            border-color: var(--brand-600);
        }

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

        .btn-light:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }

        .header-login {
            padding: 8px 20px;
            font-size: 13px;
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            border: 1px solid var(--border);
            background: var(--surface);
        }

        .menu-toggle:hover {
            background: var(--brand-50);
        }

        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }

        /* ===== Mobile menu dropdown ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 8px 24px rgba(23, 42, 51, 0.08);
            z-index: 99;
            padding: 8px 16px;
        }

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

        .mobile-menu .nav-item {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            border-radius: 8px;
        }

        .mobile-menu .nav-item+.nav-item {
            margin-top: 2px;
        }

        .mobile-menu .nav-item.active {
            background: var(--brand-50);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            background: linear-gradient(135deg, #E8F4F9 0%, #F3F7FA 100%);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(31, 122, 158, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero-inner {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge {
            display: inline-block;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .page-hero h1 {
            font-size: clamp(32px, 4vw, 40px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .page-hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 480px;
            line-height: 1.75;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .page-hero-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .page-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .page-hero-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 70%, rgba(23, 42, 51, 0.2));
            pointer-events: none;
        }

        /* ===== Feature Grid ===== */
        .feature-section {
            background: var(--surface);
            padding: 80px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

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

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

        .feature-item {
            padding: 32px 24px;
            background: var(--brand-50);
            border-radius: var(--radius-lg);
            transition: box-shadow .2s, transform .2s;
        }

        .feature-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            background: var(--brand-100);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-500);
            margin-bottom: 16px;
        }

        .feature-icon svg {
            width: 24px;
            height: 24px;
        }

        .feature-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .feature-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Scenario Section ===== */
        .scenario-section {
            background: var(--brand-50);
            padding: 80px 0;
        }

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

        .scenario-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .25s, transform .25s;
        }

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

        .scenario-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .scenario-body {
            padding: 24px;
        }

        .scenario-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .scenario-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .tag-badge {
            display: inline-block;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        /* ===== Process Steps ===== */
        .steps-section {
            background: var(--surface);
            padding: 80px 0;
        }

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

        .steps-grid::before {
            content: "";
            position: absolute;
            top: 28px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: var(--brand-100);
            z-index: 0;
        }

        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 12px;
        }

        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--brand-500);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(31, 122, 158, 0.2);
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Guides Section (3-column card) ===== */
        .guides-section {
            background: var(--bg);
            padding: 80px 0;
        }

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

        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .25s, transform .25s;
            display: flex;
            flex-direction: column;
        }

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

        .guide-cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--brand-50);
        }

        .guide-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-body .tag-badge {
            align-self: flex-start;
        }

        .guide-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .guide-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .guide-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-500);
            transition: color .2s;
        }

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

        .guide-link svg {
            width: 16px;
            height: 16px;
            transition: transform .2s;
        }

        .guide-link:hover svg {
            transform: translateX(3px);
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--surface);
            padding: 80px 0;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 8px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: color .2s;
            width: 100%;
            text-align: left;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-500);
            transition: transform .3s;
        }

        .faq-icon svg {
            width: 20px;
            height: 20px;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease, padding .3s;
            padding: 0 8px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 8px 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== CTA Banner ===== */
        .cta-section {
            padding: 0;
        }

        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(31, 122, 158, 0.85) 0%, rgba(24, 101, 129, 0.85) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-radius: 0;
            padding: 80px 0;
            text-align: center;
            overflow: hidden;
        }

        .cta-banner h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #F8FBFD;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
        }

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

        .footer-brand .logo {
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .2s;
        }

        .footer-col ul a:hover {
            color: var(--brand-500);
        }

        .footer-tip {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            background: var(--brand-50);
            border-radius: var(--radius-md);
            padding: 12px 16px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-tertiary);
        }

        /* ===== Mobile Tab Bar ===== */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 12px rgba(23, 42, 51, 0.06);
            z-index: 100;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .mobile-tabbar-inner {
            display: flex;
            height: 64px;
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: var(--text-tertiary);
            font-size: 12px;
            font-weight: 500;
            transition: color .2s;
        }

        .tab-item.active {
            color: var(--brand-500);
        }

        .tab-item svg {
            width: 24px;
            height: 24px;
        }

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

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 24px;
            }

            .steps-grid::before {
                display: none;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }

            .site-header {
                height: 56px;
            }

            .header-inner {
                height: 56px;
            }

            .main-nav,
            .header-login {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .mobile-tabbar {
                display: block;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

            .page-hero-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

            .page-hero-desc {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .page-hero-image img {
                aspect-ratio: 16/10;
            }

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

            .section-head p {
                font-size: 15px;
            }

            .feature-section,
            .scenario-section,
            .steps-section,
            .guides-section,
            .faq-section {
                padding: 48px 0;
            }

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

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

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px 16px;
            }

            .step-number {
                width: 44px;
                height: 44px;
                font-size: 16px;
            }

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

            .faq-question {
                font-size: 15px;
            }

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

            .cta-banner h2 {
                font-size: 24px;
            }

            .cta-banner p {
                font-size: 14px;
            }

            .cta-banner .btn {
                padding: 12px 28px;
                font-size: 15px;
            }

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
                padding-bottom: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

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

            body {
                padding-bottom: 64px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }

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

        @media (min-width: 768px) and (max-width: 1023px) {
            .mobile-tabbar {
                display: none;
            }

            .page-hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .page-hero-image img {
                aspect-ratio: 16/8;
            }

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

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

            .footer-main {
                grid-template-columns: 1fr 1fr;
                gap: 32px 24px;
            }
        }

/* roulang page: article */
:root {
    --brand-500: #1F7A9E;
    --brand-600: #186581;
    --brand-700: #125470;
    --brand-100: #E5F1F6;
    --brand-50: #F0F7FA;
    --accent-500: #F28B3A;
    --accent-600: #DD7426;
    --bg: #F3F7FA;
    --surface: #FFFFFF;
    --text-primary: #172A33;
    --text-secondary: #4A6572;
    --text-tertiary: #849AA6;
    --border: rgba(23, 42, 51, 0.08);
    --border-strong: #CFDEE6;
    --success: #2E9E6B;
    --danger: #D64545;
    --warning: #F5A623;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --radius-pill: 999px;
    --shadow-card: 0 4px 16px rgba(31, 122, 158, 0.08);
    --shadow-hover: 0 8px 28px rgba(31, 122, 158, 0.14);
    --shadow-header: 0 1px 0 rgba(23, 42, 51, 0.06);
}

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

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.75;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--brand-500); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--brand-600); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-header);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    white-space: nowrap;
    transition: opacity 0.2s;
}

.logo:hover { opacity: 0.85; color: var(--text-primary); }

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--brand-100);
    border-radius: var(--radius-md);
    color: var(--brand-500);
    flex-shrink: 0;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.nav-item {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    transition: background 0.2s, color 0.2s;
}

.nav-item:hover {
    color: var(--brand-500);
    background: var(--brand-50);
}

.nav-item.active {
    color: var(--brand-600);
    background: var(--brand-100);
    font-weight: 600;
}

.nav-item.active::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--brand-500);
    border-radius: 2px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn:active { transform: scale(0.98); }
.btn:focus-visible {
    outline: 2px solid rgba(242, 139, 58, 0.5);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--accent-500);
    color: #fff;
    border-color: var(--accent-500);
    box-shadow: 0 2px 8px rgba(242, 139, 58, 0.25);
}

.btn-primary:hover {
    background: var(--accent-600);
    border-color: var(--accent-600);
    color: #fff;
    box-shadow: 0 4px 14px rgba(242, 139, 58, 0.32);
}

.btn-outline {
    background: transparent;
    color: var(--brand-500);
    border-color: var(--brand-500);
}

.btn-outline:hover {
    background: var(--brand-500);
    color: #fff;
}

.btn-sm { padding: 7px 18px; font-size: 13px; }

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
}

.nav-toggle:hover { background: var(--brand-50); }

.nav-toggle svg { width: 24px; height: 24px; }

.mobile-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(23, 42, 51, 0.08);
    z-index: 99;
    padding: 8px 0;
}

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

.mobile-menu a {
    display: block;
    padding: 14px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-left: 3px solid transparent;
}

.mobile-menu a:hover { background: var(--brand-50); color: var(--brand-500); }
.mobile-menu a.active { border-left-color: var(--brand-500); color: var(--brand-600); background: var(--brand-50); }

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
    padding: 24px 0 8px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 14px;
    color: var(--text-tertiary);
}

.breadcrumb a {
    color: var(--text-secondary);
    transition: color 0.2s;
}

.breadcrumb a:hover { color: var(--brand-500); }

.breadcrumb-sep { color: var(--text-tertiary); font-size: 14px; }

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

/* ===== Article Main ===== */
.article-section {
    padding: 24px 0 48px;
}

.article-wrap {
    max-width: 860px;
    margin: 0 auto;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 48px 56px;
}

.article-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 28px;
    margin-bottom: 32px;
}

.article-meta-top {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    background: var(--brand-100);
    color: var(--brand-600);
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-pill);
}

.badge-hot {
    background: #FDF0E3;
    color: var(--accent-600);
}

.article-date {
    font-size: 14px;
    color: var(--text-tertiary);
}

.article-header h1 {
    font-size: clamp(28px, 3.6vw, 38px);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.article-excerpt {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ===== Article Content ===== */
.article-content {
    font-size: 16px;
    line-height: 1.85;
    color: var(--text-primary);
}

.article-content p {
    margin-bottom: 24px;
}

.article-content h2 {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.35;
    margin: 48px 0 18px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    margin: 36px 0 14px;
    color: var(--text-primary);
}

.article-content h4 {
    font-size: 17px;
    font-weight: 600;
    margin: 28px 0 12px;
    color: var(--text-primary);
}

.article-content a {
    color: var(--brand-500);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(31, 122, 158, 0.35);
}

.article-content a:hover { color: var(--brand-600); text-decoration-color: var(--brand-600); }

.article-content blockquote {
    border-left: 4px solid var(--brand-500);
    background: var(--brand-50);
    padding: 18px 24px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 28px 0;
    color: var(--text-secondary);
    font-size: 15px;
}

.article-content blockquote p:last-child { margin-bottom: 0; }

.article-content ul,
.article-content ol {
    margin: 20px 0 24px;
    padding-left: 26px;
}

.article-content li {
    margin-bottom: 10px;
    line-height: 1.75;
}

.article-content ul li::marker { color: var(--brand-500); }

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 28px 0;
    box-shadow: var(--shadow-card);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.article-content table th,
.article-content table td {
    border: 1px solid var(--border-strong);
    padding: 12px 16px;
    text-align: left;
}

.article-content table th {
    background: var(--brand-100);
    font-weight: 600;
    color: var(--text-primary);
}

.article-content table tr:nth-child(even) td { background: var(--brand-50); }

.article-content pre {
    background: #172A33;
    color: #E8F1F5;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.7;
    margin: 28px 0;
    font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
}

.article-content code {
    background: var(--brand-100);
    color: var(--brand-700);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-family: "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
}

.article-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
}

/* ===== CTA ===== */
.article-cta {
    max-width: 860px;
    margin: 40px auto 0;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(31, 122, 158, 0.92), rgba(18, 84, 112, 0.94)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    padding: 40px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    box-shadow: 0 8px 24px rgba(31, 122, 158, 0.18);
}

.article-cta h3 {
    color: #fff;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.article-cta p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 1.6;
}

.btn-light {
    background: #fff;
    color: var(--brand-600);
    border-color: #fff;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.btn-light:hover {
    background: var(--brand-50);
    color: var(--brand-600);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.16);
}

/* ===== Related ===== */
.related-section {
    max-width: 860px;
    margin: 48px auto 0;
}

.related-section h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.related-section h2::before {
    content: "";
    width: 4px;
    height: 22px;
    background: var(--brand-500);
    border-radius: 4px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.related-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 12px;
    box-shadow: none;
    transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.2s;
}

.related-card:hover {
    box-shadow: var(--shadow-card);
    transform: translateY(-2px);
    border-color: rgba(31, 122, 158, 0.2);
}

.related-card img {
    width: 110px;
    height: 74px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.related-card-body h3 {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
}

.related-card-date {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* ===== Article Nav Links ===== */
.article-nav-links {
    max-width: 860px;
    margin: 32px auto 0;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

/* ===== Not Found ===== */
.not-found {
    max-width: 600px;
    margin: 80px auto;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 64px 48px;
    text-align: center;
}

.not-found h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.not-found p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 28px;
}

.not-found .btn { min-width: 140px; }

/* ===== Footer ===== */
.site-footer {
    background: #F8FBFD;
    border-top: 1px solid var(--border);
    padding: 56px 0 0;
    margin-top: 40px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 32px;
}

.footer-brand .logo { font-size: 18px; margin-bottom: 14px; }

.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-top: 12px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

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

.footer-col ul a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.2s, padding-left 0.2s;
}

.footer-col ul a:hover { color: var(--brand-500); padding-left: 4px; }

.footer-tip {
    font-size: 13px;
    color: var(--text-tertiary);
    line-height: 1.7;
    background: var(--brand-50);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-tertiary);
}

.icp { font-size: 12px; }

/* ===== Mobile Tabbar ===== */
.mobile-tabbar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 16px rgba(23, 42, 51, 0.05);
    z-index: 120;
    padding-bottom: env(safe-area-inset-bottom);
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    flex: 1;
    font-size: 12px;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s;
}

.tab-item svg {
    width: 24px;
    height: 24px;
}

.tab-item:hover,
.tab-item.active { color: var(--brand-500); }

.tab-item.active { font-weight: 600; }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .main-nav, .header-actions .btn-outline { display: none; }
    .nav-toggle { display: inline-flex; }
    .mobile-tabbar { display: flex; }
    .site-footer { padding-bottom: 64px; }
}

@media (max-width: 767px) {
    .container { padding-left: 16px; padding-right: 16px; }
    .header-inner { height: 56px; }
    .logo { font-size: 16px; }
    .logo-icon { width: 32px; height: 32px; }
    .mobile-menu { top: 56px; }

    .article-wrap { padding: 24px 20px; border-radius: var(--radius-md); }
    .article-header h1 { font-size: 24px; line-height: 1.35; }
    .article-excerpt { font-size: 15px; }
    .article-content { font-size: 15px; line-height: 1.8; }
    .article-content h2 { font-size: 22px; }
    .article-content h3 { font-size: 18px; }

    .article-cta { padding: 28px 20px; flex-direction: column; text-align: center; align-items: center; }
    .article-cta h3 { font-size: 20px; }

    .related-grid { grid-template-columns: 1fr; }
    .related-card img { width: 120px; height: 80px; }
    .related-card-body h3 { font-size: 15px; }

    .footer-main { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .breadcrumb-wrap { padding-top: 16px; }
    .breadcrumb-current { max-width: 180px; }

    .not-found { padding: 48px 24px; margin: 48px 16px; }
    .not-found h1 { font-size: 24px; }
}

@media (max-width: 480px) {
    .article-wrap { padding: 20px 16px; }
    .article-meta-top { gap: 8px; }
    .badge { font-size: 12px; padding: 3px 10px; }
    .article-date { font-size: 13px; }
    .article-nav-links .btn { width: 100%; }
}

/* roulang page: category2 */
*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --brand-500: #1F7A9E;
            --brand-600: #186581;
            --brand-100: #E5F1F6;
            --brand-50: #F0F7FA;
            --accent-500: #F28B3A;
            --accent-600: #DD7426;
            --bg: #F3F7FA;
            --surface: #FFFFFF;
            --text-primary: #172A33;
            --text-secondary: #4A6572;
            --text-tertiary: #849AA6;
            --border: rgba(23, 42, 51, 0.08);
            --success: #2E9E6B;
            --danger: #D64545;
            --warning: #F5A623;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(31, 122, 158, 0.08);
            --shadow-hover: 0 8px 28px rgba(31, 122, 158, 0.14);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--brand-500);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--brand-600);
        }
        a:focus-visible {
            outline: 2px solid rgba(242, 139, 58, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ======== Header ======== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .logo:hover {
            color: var(--brand-500);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-500);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-item {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            transition: all 0.2s ease;
        }
        .nav-item:hover {
            color: var(--brand-500);
            background: var(--brand-50);
        }
        .nav-item.active {
            color: var(--brand-500);
            font-weight: 600;
        }
        .nav-item.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-500);
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            padding: 8px 20px;
            border-radius: 8px;
            border: 1.5px solid var(--brand-500);
            color: var(--brand-500);
            font-size: 14px;
            font-weight: 500;
            background: transparent;
            transition: all 0.2s ease;
        }
        .btn-login:hover {
            background: var(--brand-500);
            color: #fff;
        }
        .btn-login:active {
            transform: scale(0.98);
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            background: var(--surface);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 8px 24px rgba(23, 42, 51, 0.08);
            z-index: 99;
            padding: 8px 16px 16px;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .nav-item {
            display: block;
            padding: 14px 16px;
            border-radius: 8px;
            font-size: 15px;
        }
        .mobile-menu .nav-item + .nav-item {
            margin-top: 4px;
        }

        /* ======== Page Hero ======== */
        .page-hero {
            margin-top: 72px;
            padding: 64px 0;
            background: linear-gradient(135deg, #E8F4F9 0%, #F3F7FA 100%);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(31, 122, 158, 0.06);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: 10%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(242, 139, 58, 0.05);
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
        }
        .page-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(31, 122, 158, 0.1);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 20px;
        }
        .page-hero h1 {
            font-size: clamp(36px, 4.5vw, 48px);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: 0.01em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .page-hero h1 span {
            color: var(--brand-500);
        }
        .page-hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 520px;
        }
        .page-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            background: var(--accent-500);
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            border: none;
            transition: all 0.2s ease;
            box-shadow: 0 4px 12px rgba(242, 139, 58, 0.25);
        }
        .btn-primary:hover {
            background: var(--accent-600);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(242, 139, 58, 0.3);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            background: var(--surface);
            color: var(--brand-500);
            font-size: 15px;
            font-weight: 500;
            border: 1.5px solid var(--brand-500);
            transition: all 0.2s ease;
        }
        .btn-outline:hover {
            background: var(--brand-50);
            color: var(--brand-600);
        }
        .page-hero-image {
            position: relative;
        }
        .page-hero-image img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }
        .hero-float-card {
            position: absolute;
            bottom: 20px;
            left: -16px;
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            box-shadow: var(--shadow-hover);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            border-left: 3px solid var(--accent-500);
        }
        .hero-float-card svg {
            color: var(--success);
            flex-shrink: 0;
        }

        /* ======== Stats Bar ======== */
        .stats-bar {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 32px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .stat-item {
            text-align: center;
            padding: 8px;
        }
        .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--brand-500);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-tertiary);
            margin-top: 4px;
        }

        /* ======== Section base ======== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--surface);
        }
        .section-head {
            max-width: 640px;
            margin-bottom: 48px;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--brand-500);
            background: var(--brand-100);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ======== Feature Cards ======== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all 0.3s ease;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--brand-100);
            color: var(--brand-500);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ======== Split Section ======== */
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .split-image img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
        }
        .split-content h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .split-content p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .split-content ul {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }
        .split-content ul li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-size: 15px;
            color: var(--text-primary);
        }
        .split-content ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 9px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--brand-100);
            border: 3px solid var(--brand-500);
            background-clip: content-box;
            padding: 2px;
        }

        /* ======== Steps ======== */
        .steps-wrap {
            position: relative;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            border: 1px solid var(--border);
            position: relative;
            transition: all 0.3s ease;
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--brand-100);
            line-height: 1;
            margin-bottom: 16px;
            position: relative;
        }
        .step-num::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -6px;
            width: 32px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent-500);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ======== Article List (Left-right) ======== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .article-list-item {
            display: flex;
            gap: 24px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: all 0.3s ease;
        }
        .article-list-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .article-list-thumb {
            flex-shrink: 0;
            width: 220px;
            border-radius: 10px;
            overflow: hidden;
        }
        .article-list-thumb img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .article-list-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .article-list-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-tertiary);
        }
        .badge-cat {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 500;
        }
        .article-list-info h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .article-list-info h3 a {
            color: inherit;
        }
        .article-list-info h3 a:hover {
            color: var(--brand-500);
        }
        .article-list-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-500);
            margin-top: auto;
        }
        .article-link:hover {
            color: var(--accent-500);
        }

        /* ======== FAQ ======== */
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }
        .faq-q {
            width: 100%;
            padding: 20px 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color 0.2s ease;
        }
        .faq-q:hover {
            color: var(--brand-500);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1.5px solid var(--brand-500);
            color: var(--brand-500);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-500);
            color: #fff;
        }
        .faq-a {
            display: none;
            padding: 0 12px 20px 12px;
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
        }
        .faq-item.open .faq-a {
            display: block;
        }

        /* ======== CTA Banner ======== */
        .cta-banner {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(135deg, #1F7A9E 0%, #186581 100%);
            border-radius: 24px;
            overflow: hidden;
            text-align: center;
        }
        .cta-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
        }
        .cta-banner .container {
            position: relative;
            z-index: 1;
        }
        .cta-banner h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 10px;
            background: #fff;
            color: var(--brand-600);
            font-size: 15px;
            font-weight: 600;
            transition: all 0.2s ease;
        }
        .btn-white:hover {
            background: var(--brand-50);
            color: var(--brand-600);
            transform: translateY(-1px);
        }
        .btn-white:active {
            transform: scale(0.98);
        }

        /* ======== Footer ======== */
        .site-footer {
            margin-top: 80px;
            background: #F8FBFD;
            border-top: 1px solid var(--border);
            padding: 56px 0 24px;
        }
        .footer-main {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 12px;
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.2s ease, padding-left 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--brand-500);
            padding-left: 4px;
        }
        .footer-tip {
            font-size: 13px;
            color: var(--text-tertiary);
            line-height: 1.7;
        }
        .footer-bottom {
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--text-tertiary);
        }
        .footer-bottom .icp {
            color: var(--text-tertiary);
        }

        /* ======== Mobile Tab Bar ======== */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 16px rgba(23, 42, 51, 0.06);
            padding-bottom: env(safe-area-inset-bottom);
        }
        .tabbar-inner {
            display: flex;
            height: 64px;
        }
        .tabbar-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            color: var(--text-tertiary);
            font-size: 11px;
            font-weight: 500;
        }
        .tabbar-item.active {
            color: var(--brand-500);
        }
        .tabbar-item svg {
            width: 22px;
            height: 22px;
        }

        /* ======== Responsive ======== */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .page-hero {
                padding: 56px 0;
            }
            .footer-main {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
            .site-header {
                height: 56px;
            }
            .header-inner {
                height: 56px;
                padding: 0 16px;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                top: 56px;
            }
            .page-hero {
                margin-top: 56px;
                padding: 40px 0;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero-desc {
                font-size: 15px;
            }
            .page-hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-outline {
                justify-content: center;
            }
            .hero-float-card {
                left: 8px;
                font-size: 12px;
                padding: 10px 14px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .split-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .split-content h2 {
                font-size: 24px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .article-list-item {
                flex-direction: column;
                padding: 16px;
            }
            .article-list-thumb {
                width: 100%;
            }
            .footer-main {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .mobile-tabbar {
                display: block;
            }
            .site-footer {
                margin-bottom: 64px;
            }
        }
        @media (min-width: 768px) and (max-width: 1023px) {
            .mobile-tabbar {
                display: block;
            }
            .site-footer {
                margin-bottom: 64px;
            }
        }
        @media (min-width: 1024px) {
            .mobile-tabbar {
                display: none !important;
            }
            .site-footer {
                margin-bottom: 0;
            }
        }

/* roulang page: category3 */
/* ===== Design Tokens ===== */
        :root {
            --brand-500: #1F7A9E;
            --brand-600: #186581;
            --brand-100: #E5F1F6;
            --brand-50: #F0F7FA;
            --accent-500: #F28B3A;
            --accent-600: #DD7426;
            --neon: #00D4FF;
            --bg: #F3F7FA;
            --surface: #FFFFFF;
            --dark: #0E2A36;
            --dark-2: #0B1F2A;
            --text-primary: #172A33;
            --text-secondary: #4A6572;
            --text-tertiary: #849AA6;
            --border: rgba(23, 42, 51, 0.08);
            --border-dark: rgba(255, 255, 255, 0.12);
            --success: #2E9E6B;
            --danger: #D64545;
            --warning: #F5A623;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(31, 122, 158, 0.08);
            --shadow-hover: 0 8px 28px rgba(31, 122, 158, 0.14);
            --shadow-dark: 0 12px 32px rgba(0, 0, 0, 0.22);
            --container: 1200px;
            --header-h: 72px;
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        textarea {
            font-family: var(--font);
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

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

        .section {
            padding: 96px 0;
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 48px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 6px 14px;
            border-radius: 999px;
            letter-spacing: .02em;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            cursor: pointer;
            transition: all .22s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn:active {
            transform: scale(0.98);
        }

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

        .btn-primary:hover {
            background: var(--accent-600);
            box-shadow: 0 6px 18px rgba(242, 139, 58, 0.3);
        }

        .btn-outline {
            background: transparent;
            color: var(--brand-600);
            border-color: var(--brand-500);
        }

        .btn-outline:hover {
            background: var(--brand-50);
            border-color: var(--brand-600);
        }

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

        .btn-white:hover {
            background: var(--brand-50);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 15px 34px;
            font-size: 16px;
            border-radius: 12px;
        }

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

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

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: .01em;
            flex-shrink: 0;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            color: #fff;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .nav-item {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 2px;
            position: relative;
            transition: color .2s;
        }

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

        .nav-item.active {
            color: var(--brand-500);
            font-weight: 600;
        }

        .nav-item.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-500);
        }

        .header-btn {
            padding: 10px 22px;
            font-size: 14px;
        }

        .header-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            transition: background .2s;
        }

        .header-toggle:hover {
            background: var(--brand-50);
        }

        /* Mobile dropdown */
        .mobile-dropdown {
            display: none;
        }

        /* ===== Mobile Bottom Tabs ===== */
        .mobile-tabs {
            display: none;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, var(--brand-50) 0%, #E8F4F9 60%, #FFFFFF 100%);
            padding: 150px 0 110px;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.14) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(31, 122, 158, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--border);
            padding: 7px 18px;
            border-radius: 999px;
            margin-bottom: 22px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
        }

        .hero-tag svg {
            color: var(--neon);
        }

        .page-hero h1 {
            font-size: clamp(34px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.01em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .page-hero .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
            margin: 0 auto 34px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-brand-note {
            margin-top: 28px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-tertiary);
        }

        .hero-brand-note svg {
            color: var(--success);
        }

        /* ===== Dark Status Panel ===== */
        .section-stats {
            padding-top: 0;
            margin-top: -52px;
            position: relative;
            z-index: 5;
        }

        .stats-panel {
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
            border-radius: 20px;
            padding: 42px 48px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
        }

        .stats-panel::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon), var(--brand-500), var(--accent-500));
            border-radius: 20px 20px 0 0;
        }

        .stats-panel::after {
            content: "";
            position: absolute;
            top: -90px;
            right: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(0, 212, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 2;
        }

        .stat-item {
            text-align: center;
            padding: 12px 8px;
        }

        .stat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(0, 212, 255, 0.12);
            color: var(--neon);
            margin-bottom: 10px;
        }

        .stat-value {
            display: block;
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
        }

        .stat-label {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        .stat-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(46, 158, 107, 0.2);
            color: #7EE0B0;
            font-size: 13px;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: 999px;
            margin-top: 8px;
        }

        /* ===== Feature Cards ===== */
        .section-features {
            background: var(--bg);
        }

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

        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            flex-direction: column;
        }

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

        .feature-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .feature-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }

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

        .feature-body {
            padding: 26px 24px 28px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .feature-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            align-self: flex-start;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .feature-badge.hot {
            background: rgba(242, 139, 58, 0.12);
            color: var(--accent-600);
        }

        .feature-title {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .feature-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            flex: 1;
        }

        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 18px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-500);
            transition: gap .2s, color .2s;
        }

        .feature-link:hover {
            color: var(--brand-600);
            gap: 7px;
        }

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

        .process-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .process-content .section-head {
            margin-bottom: 28px;
        }

        .process-lead {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 28px;
        }

        .process-points {
            margin-top: 8px;
        }

        .process-points li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .process-points li svg {
            flex-shrink: 0;
            color: var(--success);
            margin-top: 3px;
        }

        .process-steps {
            display: grid;
            gap: 20px;
        }

        .process-step {
            display: flex;
            gap: 20px;
            background: var(--brand-50);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border);
            transition: transform .25s, border-color .25s, box-shadow .25s;
            position: relative;
        }

        .process-step:hover {
            transform: translateY(-3px);
            border-color: var(--brand-500);
            box-shadow: var(--shadow-card);
        }

        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--brand-500);
            color: #fff;
            font-weight: 700;
            font-size: 17px;
            flex-shrink: 0;
        }

        .step-info h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== Notice Section ===== */
        .section-notice {
            background: var(--brand-50);
        }

        .notice-box {
            background: var(--surface);
            border-radius: 18px;
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .notice-box::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(31, 122, 158, 0.08) 0%, transparent 70%);
        }

        .notice-box h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .notice-box p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.8;
        }

        .notice-box .btn {
            flex-shrink: 0;
            position: relative;
            z-index: 2;
        }

        /* ===== FAQ ===== */
        .section-faq {
            background: var(--surface);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
            padding: 24px 8px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: color .2s;
        }

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

        .faq-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            flex-shrink: 0;
            transition: all .35s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-500);
            border-color: var(--brand-500);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .3s ease;
            padding: 0 8px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.85;
            padding-bottom: 24px;
        }

        /* ===== CTA Banner ===== */
        .section-cta {
            background: var(--bg);
            padding: 80px 0;
        }

        .cta-banner {
            background: linear-gradient(135deg, rgba(14, 42, 54, 0.92), rgba(11, 31, 42, 0.88)), url('/assets/images/backpic/back-2.webp') center / cover;
            border-radius: 24px;
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--neon), var(--accent-500), var(--neon));
        }

        .cta-banner h2 {
            font-size: clamp(24px, 3.4vw, 36px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-banner p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-banner .btn {
            position: relative;
            z-index: 2;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #F8FBFD;
            border-top: 1px solid var(--border);
            padding: 60px 0 28px;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 44px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 17px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color .2s, padding-left .2s;
        }

        .footer-col ul a:hover {
            color: var(--brand-500);
            padding-left: 4px;
        }

        .footer-tip {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.85;
            background: var(--brand-50);
            border-radius: 10px;
            padding: 16px;
            border: 1px solid var(--border);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-tertiary);
        }

        .footer-bottom a {
            color: var(--text-tertiary);
        }

        .footer-bottom a:hover {
            color: var(--brand-500);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .section {
                padding: 72px 0;
            }

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

            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .process-layout {
                grid-template-columns: 1fr;
                gap: 48px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .stats-panel {
                padding: 36px 28px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --header-h: 56px;
            }

            .section {
                padding: 56px 0;
            }

            .container {
                padding: 0 16px;
            }

            .site-header {
                height: var(--header-h);
            }

            .main-nav,
            .header-btn {
                display: none;
            }

            .header-toggle {
                display: inline-flex;
            }

            .logo {
                font-size: 14px;
                gap: 8px;
            }

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

            .mobile-dropdown {
                display: block;
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
                padding: 8px 0;
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all .25s ease;
                z-index: 99;
            }

            .mobile-dropdown.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .mobile-dropdown a {
                display: block;
                padding: 14px 24px;
                font-size: 15px;
                color: var(--text-secondary);
                border-left: 3px solid transparent;
            }

            .mobile-dropdown a:hover {
                color: var(--brand-500);
                background: var(--brand-50);
            }

            .mobile-dropdown a.active {
                color: var(--brand-500);
                border-left-color: var(--brand-500);
                background: var(--brand-50);
                font-weight: 600;
            }

            .mobile-tabs {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                z-index: 100;
                height: calc(64px + env(safe-area-inset-bottom));
                padding-bottom: env(safe-area-inset-bottom);
                background: rgba(255, 255, 255, 0.97);
                -webkit-backdrop-filter: blur(12px);
                backdrop-filter: blur(12px);
                border-top: 1px solid var(--border);
                box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04);
            }

            .mobile-tabs .m-tab {
                flex: 1;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 3px;
                font-size: 11px;
                font-weight: 500;
                color: var(--text-tertiary);
                padding: 8px 0 6px;
            }

            .mobile-tabs .m-tab svg {
                width: 22px;
                height: 22px;
            }

            .mobile-tabs .m-tab.active {
                color: var(--brand-500);
                font-weight: 600;
            }

            .page-hero {
                padding: 120px 0 96px;
            }

            .page-hero .hero-sub {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
                max-width: 300px;
            }

            .feature-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .feature-card {
                border-radius: 14px;
            }

            .notice-box {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
                gap: 24px;
            }

            .notice-box p {
                max-width: 100%;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stats-panel {
                border-radius: 16px;
                padding: 28px 16px;
            }

            .stat-item {
                padding: 12px 4px;
            }

            .stat-value {
                font-size: 19px;
            }

            .process-step {
                padding: 18px;
                gap: 14px;
            }

            .cta-banner {
                padding: 48px 24px;
                border-radius: 18px;
            }

            .cta-banner p {
                font-size: 14px;
            }

            .cta-banner .btn {
                width: 100%;
                max-width: 280px;
            }

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .faq-question {
                font-size: 15px;
                padding: 20px 4px;
            }

            .faq-answer p {
                font-size: 14px;
            }
        }

        @media (max-width: 380px) {
            .logo span {
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
                max-width: 180px;
            }

            .hero-brand-note {
                font-size: 12px;
            }
        }

        @media (min-width: 768px) {
            .mobile-dropdown {
                display: none !important;
            }
        }