/* roulang page: index */
:root {
            --primary: #1E4A7A;
            --primary-light: #2E6BA6;
            --accent: #14A88E;
            --accent-bg: rgba(20, 168, 142, 0.10);
            --warning: #E8A33D;
            --warning-bg: #FDF6EC;
            --bg: #F6F8FB;
            --bg-alt: #F0F3F8;
            --card-bg: #FFFFFF;
            --text: #1A2333;
            --text-body: #3D4A5C;
            --text-weak: #7A8599;
            --border: #E6EAF0;
            --border-card: #E2E8F0;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow: 0 2px 8px rgba(26, 35, 51, 0.06);
            --shadow-hover: 0 8px 24px rgba(26, 35, 51, 0.10);
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            --footer-bg: #1A2333;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.75;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--primary-light);
        }

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

        h1, h2, h3, h4, h5, h6 {
            color: var(--text);
            font-weight: 700;
            letter-spacing: -0.3px;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-padding {
            padding: 64px 0;
        }

        .section-title-wrap {
            margin-bottom: 40px;
        }

        .section-title-wrap .section-bar {
            display: block;
            width: 32px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin-bottom: 16px;
        }

        .section-title-wrap h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .section-title-wrap p {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 0;
            max-width: 640px;
        }

        /* ===== 按钮 ===== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 2px 4px rgba(30, 74, 122, 0.2);
            line-height: 1.4;
        }
        .btn-primary-custom:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 74, 122, 0.25);
        }
        .btn-primary-custom:active {
            transform: translateY(0);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
        }
        .btn-outline-custom:hover {
            background: rgba(46, 107, 166, 0.08);
            color: var(--primary-light);
            border-color: var(--primary-light);
        }

        .btn-warning-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--warning);
            color: #fff;
            border: 1px solid var(--warning);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 2px 4px rgba(232, 163, 61, 0.25);
        }
        .btn-warning-custom:hover {
            background: #d8942f;
            border-color: #d8942f;
            transform: translateY(-1px);
        }

        /* ===== 导航 ===== */
        .site-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: 240px;
            height: 100vh;
            background: #fff;
            border-right: 1px solid var(--border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            padding: 28px 16px 20px;
            overflow-y: auto;
        }

        .nav-brand {
            padding: 0 8px;
            margin-bottom: 28px;
        }
        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .nav-logo-icon {
            width: 40px;
            height: 40px;
            min-width: 40px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -1px;
        }
        .nav-brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }

        .nav-menu {
            list-style: none;
            margin: 0;
            padding: 0;
            flex: 1;
        }
        .nav-menu li {
            margin-bottom: 4px;
        }
        .nav-menu .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            position: relative;
            transition: all 0.25s ease;
        }
        .nav-menu .nav-link i {
            width: 18px;
            text-align: center;
            font-size: 16px;
            opacity: 0.8;
        }
        .nav-menu .nav-link:hover {
            background: rgba(30, 74, 122, 0.06);
            color: var(--primary);
        }
        .nav-menu .nav-link.active {
            background: rgba(30, 74, 122, 0.10);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-menu .nav-link.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            background: var(--primary);
            border-radius: 3px;
        }

        .nav-contact {
            margin-top: 20px;
            padding: 16px;
            background: var(--bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
        }
        .nav-contact p {
            margin-bottom: 8px;
            font-size: 13px;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-contact p i {
            color: var(--primary);
            font-size: 14px;
        }
        .nav-contact p:last-child {
            margin-bottom: 0;
        }

        .nav-close {
            display: none;
        }

        /* 移动端顶栏 */
        .mobile-header {
            display: none;
        }

        .nav-overlay {
            display: none;
        }

        /* ===== 主内容区 ===== */
        .site-main {
            margin-left: 240px;
            min-height: 100vh;
        }

        /* ===== Hero ===== */
        .hero-section {
            min-height: calc(80vh - 0px);
            background: linear-gradient(135deg, #F6F8FB 0%, #EDF1F7 60%, #E4EDF4 100%);
            position: relative;
            display: flex;
            align-items: center;
            padding: 72px 0;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
            opacity: 0.30;
            z-index: 0;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to bottom, transparent, var(--bg));
            z-index: 1;
            pointer-events: none;
        }
        .hero-section .container-custom {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .hero-text {
            flex: 0 0 55%;
            max-width: 55%;
        }
        .hero-visual {
            flex: 0 0 45%;
            max-width: 45%;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-bg);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            color: var(--primary);
        }
        .hero-sub {
            font-size: 16px;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 28px;
        }
        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13px;
            color: var(--text-weak);
        }
        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-trust i {
            color: var(--accent);
        }

        .hero-visual .hero-img-wrap {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 16px 40px rgba(26, 35, 51, 0.12);
            background: #fff;
            position: relative;
        }
        .hero-visual .hero-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            border-radius: 16px;
        }

        /* ===== 优惠阶梯区 ===== */
        .benefits-section {
            padding: 64px 0;
            background: var(--bg);
        }

        .benefit-card {
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 32px 24px 24px;
            transition: all 0.25s ease;
            position: relative;
            height: 100%;
            box-shadow: var(--shadow);
        }
        .benefit-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.4);
            transform: translateY(-3px);
        }
        .benefit-card.recommended {
            border-color: var(--accent);
            border-width: 1.5px;
            box-shadow: 0 8px 24px rgba(20, 168, 142, 0.12);
        }
        .benefit-card .recommend-tag {
            position: absolute;
            top: -10px;
            right: 16px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: var(--radius-badge);
        }
        .benefit-card .step-num {
            font-size: 32px;
            font-weight: 700;
            color: rgba(30, 74, 122, 0.25);
            line-height: 1;
            margin-bottom: 16px;
        }
        .benefit-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }
        .benefit-card .card-desc {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .benefit-card .target-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .benefit-card .target-tags span {
            background: var(--bg-alt);
            color: var(--text-body);
            font-size: 12px;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
        }

        /* ===== 套餐对比区 ===== */
        .pricing-section {
            padding: 64px 0;
            background: var(--bg-alt);
        }

        .pricing-table-wrap {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid var(--border-card);
        }

        .pricing-table {
            width: 100%;
            border-collapse: collapse;
        }
        .pricing-table th,
        .pricing-table td {
            padding: 14px 20px;
            text-align: center;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
            vertical-align: middle;
        }
        .pricing-table th {
            font-weight: 600;
            color: var(--text);
            background: var(--bg);
            font-size: 15px;
        }
        .pricing-table th.pricing-highlight {
            background: var(--primary);
            color: #fff;
        }
        .pricing-table td.pricing-highlight {
            background: rgba(30, 74, 122, 0.03);
        }
        .pricing-table tr:last-child th,
        .pricing-table tr:last-child td {
            border-bottom: none;
        }
        .pricing-table .btn-cell {
            padding-top: 16px;
            padding-bottom: 16px;
        }
        .pricing-table .plan-name {
            font-size: 17px;
            font-weight: 700;
        }
        .pricing-table .plan-rec-tag {
            display: inline-block;
            background: var(--accent-bg);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: var(--radius-badge);
            margin-top: 4px;
        }

        /* ===== 限时入口区 ===== */
        .promo-section {
            padding: 48px 0;
            background: var(--bg);
        }

        .promo-banner {
            background: var(--warning-bg);
            border-radius: 16px;
            padding: 40px 48px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(232, 163, 61, 0.3);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 32px;
        }
        .promo-banner::before {
            content: '';
            position: absolute;
            top: -30px;
            right: 10%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            border: 2px solid rgba(232, 163, 61, 0.15);
        }
        .promo-banner::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -20px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 2px solid rgba(232, 163, 61, 0.10);
        }

        .promo-content {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 280px;
        }
        .promo-badge {
            display: inline-block;
            background: var(--warning);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
        }
        .promo-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .promo-desc {
            font-size: 14px;
            color: var(--text-body);
            margin-bottom: 16px;
        }
        .promo-countdown {
            display: flex;
            gap: 16px;
            margin-top: 12px;
        }
        .promo-countdown .count-item {
            text-align: center;
        }
        .promo-countdown .count-num {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .promo-countdown .count-label {
            font-size: 12px;
            color: var(--text-weak);
            text-transform: uppercase;
        }

        .promo-action {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        /* ===== 咨询表单区 ===== */
        .contact-section {
            padding: 64px 0;
            background: var(--bg-alt);
        }

        .contact-grid {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }
        .contact-info {
            flex: 0 0 38%;
            max-width: 38%;
        }
        .contact-form-wrap {
            flex: 0 0 62%;
            max-width: 62%;
        }

        .contact-info .info-item {
            display: flex;
            gap: 16px;
            margin-bottom: 28px;
            align-items: flex-start;
        }
        .contact-info .info-item .icon-circle {
            width: 44px;
            height: 44px;
            min-width: 44px;
            background: rgba(30, 74, 122, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
        }
        .contact-info .info-item .info-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 2px;
        }
        .contact-info .info-item .info-value {
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
        }

        .contact-info .contact-extra {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow);
            font-size: 14px;
            color: var(--text-body);
            margin-top: 36px;
        }
        .contact-info .contact-extra i {
            color: var(--accent);
            margin-right: 6px;
        }

        .contact-form-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-card);
        }

        .contact-form-card .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 8px;
        }
        .contact-form-card .form-control {
            height: 44px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-card);
            font-size: 15px;
            padding: 10px 16px;
            transition: all 0.25s ease;
            background: #fff;
        }
        .contact-form-card .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 107, 166, 0.15);
            outline: none;
        }
        .contact-form-card textarea.form-control {
            height: auto;
            min-height: 100px;
            resize: vertical;
        }
        .contact-form-card .form-select {
            height: 44px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border-card);
            font-size: 15px;
            padding: 10px 16px;
        }
        .contact-form-card .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 107, 166, 0.15);
        }

        /* ===== 最新动态 ===== */
        .news-section {
            padding: 64px 0;
            background: var(--bg);
        }

        .news-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 36px;
        }
        .news-header .section-title-wrap {
            margin-bottom: 0;
        }
        .news-header .more-link {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-header .more-link i {
            font-size: 12px;
        }

        .news-card {
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.25s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.4);
            transform: translateY(-3px);
        }
        .news-card .news-cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            background: var(--bg-alt);
            border-radius: 0;
        }
        .news-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-badge {
            display: inline-block;
            background: var(--accent-bg);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: var(--radius-badge);
            align-self: flex-start;
            margin-bottom: 12px;
        }
        .news-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-title a {
            color: inherit;
        }
        .news-card-title a:hover {
            color: var(--primary);
        }
        .news-card-excerpt {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 20px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .news-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin-top: auto;
        }
        .news-card-meta a {
            font-weight: 500;
            color: var(--primary);
            font-size: 13px;
        }
        .news-card-meta a:hover {
            color: var(--primary-light);
        }

        .news-empty {
            background: var(--card-bg);
            border: 1px dashed var(--border-card);
            border-radius: var(--radius-card);
            padding: 48px;
            text-align: center;
            color: var(--text-weak);
            font-size: 15px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0;
            background: var(--bg-alt);
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            margin-bottom: 16px;
            box-shadow: var(--shadow);
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.3);
        }
        .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            cursor: pointer;
        }
        .faq-question .faq-icon {
            color: var(--primary);
            flex-shrink: 0;
        }
        .faq-answer {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.75;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-left: 240px;
        }
        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            padding-bottom: 40px;
        }
        .footer-col {
            flex: 1;
            min-width: 200px;
        }
        .footer-col-brand {
            flex: 2;
            min-width: 280px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-logo .nav-logo-icon {
            background: var(--primary-light);
        }
        .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .footer-col-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: all 0.25s ease;
        }
        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 2px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
        }
        .footer-contact li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .footer-domain {
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199.98px) {
            .site-nav {
                width: 200px;
            }
            .site-main {
                margin-left: 200px;
            }
            .site-footer {
                margin-left: 200px;
            }
            .hero-title {
                font-size: 32px;
            }
            .promo-banner {
                padding: 32px;
            }
        }

        @media (max-width: 991.98px) {
            .site-nav {
                display: none;
            }
            .mobile-header {
                display: flex;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                height: 60px;
                background: #fff;
                border-bottom: 1px solid var(--border);
                z-index: 1050;
                align-items: center;
                justify-content: space-between;
                padding: 0 20px;
            }
            .mobile-header .mobile-brand {
                font-size: 18px;
                font-weight: 700;
                color: var(--primary);
                text-decoration: none;
                display: flex;
                align-items: center;
                gap: 8px;
            }
            .mobile-header .mobile-brand .nav-logo-icon {
                width: 32px;
                height: 32px;
                min-width: 32px;
                font-size: 16px;
                border-radius: 8px;
            }
            .mobile-header .nav-toggle {
                background: none;
                border: none;
                font-size: 22px;
                color: var(--text);
                cursor: pointer;
                padding: 8px;
                border-radius: 8px;
            }
            .mobile-header .nav-toggle:hover {
                background: var(--bg);
            }

            .site-nav.active-menu {
                display: flex;
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                width: 100%;
                height: auto;
                max-height: calc(100vh - 60px);
                background: #fff;
                border-right: none;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
                padding: 16px 20px;
                z-index: 1045;
                overflow-y: auto;
                flex-direction: column;
            }
            .site-nav.active-menu .nav-brand {
                margin-bottom: 12px;
            }
            .site-nav.active-menu .nav-contact {
                display: none;
            }

            .site-main {
                margin-left: 0;
                padding-top: 60px;
            }
            .site-footer {
                margin-left: 0;
            }

            .hero-section {
                min-height: auto;
                padding: 56px 0;
            }
            .hero-content {
                flex-direction: column;
                gap: 32px;
            }
            .hero-text {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .hero-visual {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .hero-visual .hero-img-wrap img {
                max-height: 300px;
                object-fit: cover;
            }

            .contact-grid {
                flex-direction: column;
                gap: 32px;
            }
            .contact-info {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .contact-form-wrap {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .benefits-section,
            .pricing-section,
            .contact-section,
            .news-section,
            .faq-section {
                padding: 48px 0;
            }
        }

        @media (max-width: 767.98px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-padding {
                padding: 44px 0;
            }

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

            .hero-title {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-outline-custom {
                padding: 10px 20px;
                font-size: 14px;
            }
            .hero-trust {
                gap: 12px;
                flex-direction: column;
            }

            .benefit-card {
                padding: 24px 20px;
            }

            .pricing-table-responsive {
                overflow-x: auto;
            }

            .promo-banner {
                padding: 24px;
                flex-direction: column;
                text-align: center;
                gap: 20px;
            }
            .promo-countdown {
                justify-content: center;
            }

            .contact-form-card {
                padding: 24px;
            }

            .news-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .faq-item {
                padding: 20px;
            }

            .footer-grid {
                flex-direction: column;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-col-brand {
                flex: 0 0 100%;
                min-width: 100%;
            }
            .footer-col {
                min-width: 100%;
            }
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1E4A7A;
            --primary-light: #2E6BA6;
            --accent: #14A88E;
            --accent-soft: rgba(20, 168, 142, 0.12);
            --warning: #E8A33D;
            --warning-soft: #FDF6EC;
            --bg: #F6F8FB;
            --bg-alt: #F0F3F8;
            --card-bg: #FFFFFF;
            --text: #1A2333;
            --text-body: #3D4A5C;
            --text-weak: #7A8599;
            --border: #E2E8F0;
            --radius-lg: 16px;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 2px 8px rgba(26, 35, 51, 0.06);
            --shadow-hover: 0 8px 24px rgba(26, 35, 51, 0.10);
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", 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-body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s ease;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== 左侧导航（桌面端） ========== */
        .site-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: 240px;
            height: 100vh;
            background: #FFFFFF;
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            padding: 32px 20px 24px;
            z-index: 1050;
        }

        .nav-brand {
            margin-bottom: 36px;
            padding: 0 4px;
        }

        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .nav-menu {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .nav-menu .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-left: 3px solid transparent;
            transition: background .25s ease, color .25s ease, border-color .25s ease;
        }

        .nav-menu .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-weak);
            transition: color .25s ease;
        }

        .nav-menu .nav-link:hover {
            background: rgba(30, 74, 122, 0.06);
            color: var(--primary);
        }

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

        .nav-menu .nav-link.active {
            background: rgba(30, 74, 122, 0.10);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }

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

        .nav-contact {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            margin-top: 20px;
        }

        .nav-contact p {
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .nav-contact p i {
            width: 16px;
            text-align: center;
            color: var(--primary-light);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid var(--border);
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            margin-left: auto;
        }

        /* ========== 主内容区（右侧） ========== */
        .page-main {
            margin-left: 240px;
            padding: 40px 40px 64px;
            min-height: 100vh;
        }

        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-custom {
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--text-weak);
            transition: color .25s ease;
        }

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

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

        .breadcrumb-custom .current {
            color: var(--text-body);
        }

        /* ========== 分类 Hero ========== */
        .category-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            overflow: hidden;
            margin-bottom: 56px;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.90);
            border-radius: inherit;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 1;
            max-width: 680px;
        }

        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .category-hero h1 span {
            color: var(--primary);
        }

        .category-hero p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-body);
            margin-bottom: 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 18px;
        }

        .hero-badge i {
            font-size: 12px;
        }

        /* ========== 通用区块 ========== */
        .cat-section {
            padding: 56px 0;
        }

        .cat-section.alt {
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            padding-left: 40px;
            padding-right: 40px;
            margin: 8px 0;
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
            margin-bottom: 8px;
            position: relative;
            padding-left: 18px;
        }

        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-head p {
            font-size: 14px;
            color: var(--text-weak);
            padding-left: 18px;
            margin-bottom: 0;
        }

        /* ========== 服务范围卡片 ========== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 28px;
            box-shadow: var(--shadow);
            transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
        }

        .service-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.4);
            transform: translateY(-3px);
        }

        .service-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(30, 74, 122, 0.08);
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== 流程区块 ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .process-step {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: box-shadow .25s ease, transform .25s ease;
        }

        .process-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .process-step .step-num {
            font-size: 32px;
            font-weight: 700;
            color: rgba(30, 74, 122, 0.25);
            line-height: 1;
            margin-bottom: 14px;
        }

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

        .process-step p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.6;
            margin-bottom: 0;
        }

        .process-step::after {
            content: '';
            position: absolute;
            right: -10px;
            top: 48%;
            width: 8px;
            height: 8px;
            border-top: 2px solid var(--accent);
            border-right: 2px solid var(--accent);
            transform: rotate(45deg) translateY(-50%);
        }

        .process-step:last-child::after {
            display: none;
        }

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

        .case-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
        }

        .case-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.4);
            transform: translateY(-3px);
        }

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

        .case-card .case-body {
            padding: 24px;
        }

        .case-card .case-tag {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 12px;
            margin-bottom: 12px;
        }

        .case-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .case-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .case-meta {
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .case-meta i {
            color: var(--accent);
        }

        /* ========== FAQ 手风琴 ========== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: box-shadow .25s ease, border-color .25s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.3);
        }

        .faq-item summary {
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: color .25s ease;
        }

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

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 13px;
            color: var(--primary);
            transition: transform .3s ease;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.75;
            border-top: 1px solid var(--border);
            margin-top: 0;
        }

        .faq-answer p {
            padding-top: 14px;
            margin-bottom: 0;
        }

        /* ========== CTA 条 ========== */
        .cta-banner {
            background: var(--warning-soft);
            border: 1px solid rgba(232, 163, 61, 0.25);
            border-radius: var(--radius-lg);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

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

        .cta-banner p {
            font-size: 15px;
            color: var(--text-body);
            margin-bottom: 0;
        }

        .cta-banner .btn {
            flex-shrink: 0;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            transition: all .25s ease;
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 4px rgba(30, 74, 122, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 74, 122, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

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

        .btn-secondary:hover {
            background: rgba(46, 107, 166, 0.08);
            color: var(--primary);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            margin-left: 240px;
            background: #142635;
            color: #aab6c4;
            padding: 48px 0 24px;
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 36px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .footer-brand-name {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .footer-col-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

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

        .footer-col ul li a {
            color: #aab6c4;
            font-size: 14px;
            transition: color .25s ease;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }

        .footer-contact li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            font-size: 13px;
            color: rgba(170, 182, 196, 0.6);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .footer-domain {
            opacity: 0.7;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1199.98px) {
            .site-nav {
                width: 200px;
            }

            .page-main {
                margin-left: 200px;
            }

            .site-footer {
                margin-left: 200px;
            }

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

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

            .process-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .process-step::after {
                display: none;
            }
        }

        @media (max-width: 991.98px) {
            .site-nav {
                position: fixed;
                width: 100%;
                height: 60px;
                flex-direction: row;
                align-items: center;
                padding: 0 20px;
                background: #fff;
                border-right: none;
                border-bottom: 1px solid var(--border);
            }

            .nav-brand {
                margin-bottom: 0;
                display: flex;
                align-items: center;
                width: 100%;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 17px;
            }

            .nav-brand-text {
                font-size: 18px;
            }

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

            .nav-menu {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                background: #fff;
                padding: 16px 20px 24px;
                box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
                flex-direction: column;
                gap: 4px;
            }

            .site-nav.nav-open .nav-menu {
                display: flex;
            }

            .nav-contact {
                display: none;
            }

            .page-main {
                margin-left: 0;
                padding: 88px 24px 48px;
            }

            .site-footer {
                margin-left: 0;
            }

            .category-hero {
                padding: 44px 32px;
            }

            .cat-section.alt {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        @media (max-width: 767.98px) {
            .page-main {
                padding: 84px 16px 40px;
            }

            .category-hero {
                padding: 36px 24px;
                border-radius: var(--radius);
            }

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

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

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

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

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

            .cta-banner {
                padding: 28px 24px;
                text-align: center;
                justify-content: center;
            }

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

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

            .footer-inner {
                padding: 0 24px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 24px;
            }

            .hero-badge {
                font-size: 12px;
            }

            .faq-item summary {
                padding: 18px 16px;
                font-size: 14px;
            }

            .faq-answer {
                padding: 0 16px 16px;
            }

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

/* roulang page: article */
:root {
            --primary: #1E4A7A;
            --primary-light: #2E6BA6;
            --primary-dark: #153A5E;
            --accent: #14A88E;
            --accent-light: rgba(20, 168, 142, 0.1);
            --warning: #E8A33D;
            --warning-light: #FDF6EC;
            --bg: #F6F8FB;
            --bg-alt: #F0F3F8;
            --white: #FFFFFF;
            --text-title: #1A2333;
            --text-body: #3D4A5C;
            --text-muted: #7A8599;
            --border: #E6EAF0;
            --border-card: #E2E8F0;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --radius-tag: 999px;
            --shadow-card: 0 2px 8px rgba(26, 35, 51, 0.06);
            --shadow-hover: 0 8px 24px rgba(26, 35, 51, 0.10);
            --nav-width: 240px;
            --nav-width-tablet: 200px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        .container-fluid {
            padding-left: 0;
            padding-right: 0;
        }

        /* ======== 左侧导航 ======== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--white);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            padding: 32px 20px 24px;
            z-index: 1050;
            overflow-y: auto;
        }

        .nav-brand {
            margin-bottom: 36px;
        }

        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -1px;
            flex-shrink: 0;
            box-shadow: 0 4px 10px rgba(30, 74, 122, 0.25);
        }

        .nav-brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.3px;
        }

        .nav-menu {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-menu li {
            list-style: none;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            text-decoration: none;
            position: relative;
            transition: all 0.25s ease;
        }

        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: color 0.25s ease;
        }

        .nav-link:hover {
            background: rgba(30, 74, 122, 0.06);
            color: var(--primary);
        }

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

        .nav-link.active {
            background: rgba(30, 74, 122, 0.1);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }

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

        .nav-contact {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            margin-top: 20px;
        }

        .nav-contact p {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
        }

        .nav-contact i {
            width: 16px;
            color: var(--primary-light);
        }

        /* ======== 移动端头部 ======== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 60px;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            z-index: 1050;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            box-shadow: 0 2px 8px rgba(26, 35, 51, 0.04);
        }

        .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .mobile-logo .nav-logo-icon {
            width: 34px;
            height: 34px;
            font-size: 18px;
            border-radius: 8px;
        }

        .mobile-logo span:last-child {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
        }

        .mobile-toggle {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--primary);
            cursor: pointer;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            transition: background 0.25s ease;
        }

        .mobile-toggle:hover {
            background: rgba(30, 74, 122, 0.06);
        }

        /* ======== 主内容区 ======== */
        .site-main {
            margin-left: var(--nav-width);
            min-height: 100vh;
        }

        /* ======== 面包屑 ======== */
        .article-wrapper {
            padding: 40px 40px 32px;
            max-width: 1240px;
            margin: 0 auto;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 28px;
            gap: 6px;
        }

        .breadcrumb-nav a {
            color: var(--primary-light);
            text-decoration: none;
        }

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

        .breadcrumb-nav .separator {
            color: #9CA3AF;
            margin: 0 2px;
        }

        .breadcrumb-nav .current {
            color: var(--text-muted);
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ======== 文章卡片 ======== */
        .article-card {
            background: var(--white);
            border-radius: 16px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-card);
            padding: 48px 56px;
            margin-bottom: 40px;
        }

        .article-header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }

        .article-category-badge {
            display: inline-block;
            padding: 5px 16px;
            background: var(--accent-light);
            color: var(--accent);
            border-radius: var(--radius-tag);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .article-header h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-title);
            line-height: 1.35;
            margin: 0 0 18px;
            letter-spacing: -0.5px;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            gap: 28px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-meta i {
            color: var(--primary-light);
            font-size: 13px;
        }

        /* ======== 正文排版 ======== */
        .article-body {
            max-width: 780px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-body);
        }

        .article-body p {
            margin: 0 0 24px;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-title);
            margin: 36px 0 18px;
            letter-spacing: -0.3px;
            position: relative;
            padding-left: 14px;
        }

        .article-body h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 4px;
            background: var(--primary);
            border-radius: 999px;
        }

        .article-body h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-title);
            margin: 28px 0 14px;
        }

        .article-body h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            margin: 20px 0 10px;
        }

        .article-body img {
            max-width: 100%;
            border-radius: 12px;
            margin: 28px 0;
            box-shadow: 0 4px 16px rgba(26, 35, 51, 0.08);
        }

        .article-body figure {
            margin: 28px 0;
        }

        .article-body figure img {
            margin: 0 0 8px;
        }

        .article-body figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg);
            padding: 18px 22px;
            border-radius: 0 8px 8px 0;
            margin: 32px 0;
            color: var(--text-body);
            font-style: normal;
        }

        .article-body blockquote p {
            margin: 0;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 24px 1.5em;
            padding: 0;
        }

        .article-body ul {
            list-style: disc;
        }

        .article-body ol {
            list-style: decimal;
        }

        .article-body li {
            margin-bottom: 8px;
            line-height: 1.8;
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-color: rgba(30, 74, 122, 0.3);
        }

        .article-body a:hover {
            color: var(--primary-light);
            text-decoration-color: var(--primary-light);
        }

        .article-body code {
            background: var(--bg-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            font-size: 14px;
            color: var(--primary-dark);
        }

        .article-body pre {
            background: #f0f3f8;
            border-radius: 12px;
            padding: 20px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.7;
        }

        .article-body pre code {
            background: none;
            padding: 0;
            font-size: 14px;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

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

        .article-body table th {
            background: var(--bg-alt);
            font-weight: 600;
            color: var(--text-title);
        }

        /* ======== 空内容 ======== */
        .article-empty {
            text-align: center;
            padding: 80px 24px;
        }

        .article-empty-icon {
            font-size: 48px;
            color: var(--text-muted);
            margin-bottom: 20px;
            opacity: 0.4;
        }

        .article-empty p {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        .article-empty a {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.25s ease;
            box-shadow: 0 2px 4px rgba(30, 74, 122, 0.2);
        }

        .article-empty a:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
        }

        /* ======== 相关推荐 ======== */
        .related-section {
            margin-bottom: 40px;
        }

        .related-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-title);
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 28px;
            letter-spacing: -0.3px;
        }

        .related-title::before {
            content: '';
            width: 32px;
            height: 4px;
            background: var(--primary);
            border-radius: 999px;
            flex-shrink: 0;
        }

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

        .related-card {
            background: var(--white);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: all 0.25s ease;
            text-decoration: none;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.4);
            transform: translateY(-2px);
            text-decoration: none;
        }

        .related-card img {
            width: 72px;
            height: 72px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .related-card-body {
            flex: 1;
            min-width: 0;
        }

        .related-card-cat {
            font-size: 12px;
            color: var(--accent);
            font-weight: 600;
            display: block;
            margin-bottom: 4px;
            letter-spacing: 0.3px;
        }

        .related-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 6px;
            line-height: 1.5;
            transition: color 0.25s ease;
        }

        .related-card:hover h3 {
            color: var(--primary);
        }

        .related-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ======== 返回入口 ======== */
        .article-back {
            text-align: center;
            margin-bottom: 56px;
        }

        .article-back a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            padding: 12px 32px;
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
        }

        .article-back a:hover {
            background: rgba(30, 74, 122, 0.08);
            transform: translateY(-1px);
        }

        /* ======== CTA 区 ======== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 72px 40px;
            position: relative;
            overflow: hidden;
            margin: 0 auto;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 260px;
            height: 260px;
            border: 2px solid rgba(255, 255, 255, 0.1);
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 30%;
            width: 200px;
            height: 200px;
            border: 2px solid rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .cta-container {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .cta-container h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }

        .cta-container p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-container .btn-primary {
            background: #fff;
            color: var(--primary);
            border: none;
            padding: 14px 40px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            transition: all 0.25s ease;
        }

        .cta-container .btn-primary:hover {
            background: var(--warning);
            color: var(--text-title);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        /* ======== 页脚 ======== */
        .site-footer {
            background: #142635;
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 24px;
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-col-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }

        .footer-col-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

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

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.25s ease;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }

        .footer-contact i {
            width: 16px;
            text-align: center;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-domain {
            color: rgba(255, 255, 255, 0.3);
        }

        /* ======== 响应式断点 ======== */
        @media (max-width: 1199.98px) {
            .site-nav {
                width: var(--nav-width-tablet);
                padding: 28px 16px 20px;
            }

            .site-main {
                margin-left: var(--nav-width-tablet);
            }

            .article-wrapper {
                padding: 32px 24px 28px;
            }

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

            .related-card {
                padding: 16px;
                flex-direction: column;
            }

            .related-card img {
                width: 100%;
                height: 120px;
            }
        }

        @media (max-width: 991.98px) {
            .site-nav {
                display: block;
                position: fixed;
                top: 60px;
                left: 0;
                width: 100%;
                height: auto;
                max-height: calc(100vh - 60px);
                overflow-y: auto;
                transform: translateY(-130%);
                transition: transform 0.35s ease;
                border-right: none;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
                padding: 20px;
                z-index: 1040;
            }

            .site-nav.open {
                transform: translateY(0);
            }

            .site-nav .nav-contact {
                margin-top: 16px;
            }

            .mobile-header {
                display: flex;
            }

            .site-main {
                margin-left: 0;
                padding-top: 60px;
            }

            .article-wrapper {
                padding: 24px 20px;
            }

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

            .related-card {
                flex-direction: row;
            }

            .related-card img {
                width: 72px;
                height: 72px;
            }

            .article-card {
                padding: 32px 32px;
            }
        }

        @media (max-width: 767.98px) {
            .article-card {
                padding: 24px 20px;
                border-radius: 12px;
            }

            .article-header h1 {
                font-size: 26px;
                line-height: 1.4;
            }

            .article-meta {
                gap: 16px;
                font-size: 13px;
                flex-direction: column;
                align-items: center;
            }

            .article-body {
                font-size: 15px;
                line-height: 1.85;
            }

            .article-body h2 {
                font-size: 21px;
            }

            .article-body h3 {
                font-size: 17px;
            }

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

            .related-card {
                flex-direction: row;
                align-items: center;
            }

            .related-card img {
                width: 64px;
                height: 64px;
            }

            .breadcrumb-nav .current {
                max-width: 150px;
            }

            .cta-section {
                padding: 56px 24px;
            }

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

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

            .footer-inner {
                padding: 0 20px;
            }

            .footer-bottom {
                font-size: 12px;
                line-height: 1.8;
            }
        }

        @media (max-width: 575.98px) {
            .article-wrapper {
                padding: 16px 14px;
            }

            .article-card {
                padding: 20px 16px;
                border-radius: 10px;
            }

            .article-header {
                margin-bottom: 28px;
                padding-bottom: 24px;
            }

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

            .related-card {
                padding: 14px;
            }

            .related-card img {
                width: 56px;
                height: 56px;
            }

            .related-card h3 {
                font-size: 14px;
            }

            .related-card p {
                -webkit-line-clamp: 1;
            }

            .article-back a {
                width: 100%;
                justify-content: center;
            }

            .breadcrumb-nav {
                font-size: 12px;
                margin-bottom: 20px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1E4A7A;
            --primary-light: #2E6BA6;
            --accent: #14A88E;
            --warning: #E8A33D;
            --bg: #F6F8FB;
            --bg-alt: #F0F3F8;
            --card-bg: #FFFFFF;
            --text: #1A2333;
            --text-body: #3D4A5C;
            --text-muted: #7A8599;
            --border: #E2E8F0;
            --divide: #E6EAF0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 2px 8px rgba(26, 35, 51, 0.06);
            --shadow-hover: 0 8px 24px rgba(26, 35, 51, 0.10);
            --nav-width: 240px;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 767.98px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 导航 ========== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: #F8FAFC;
            border-right: 1px solid var(--divide);
            display: flex;
            flex-direction: column;
            padding: 28px 20px 24px;
            z-index: 1050;
            overflow-y: auto;
        }

        .nav-brand {
            margin-bottom: 32px;
        }

        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.3px;
        }

        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-brand-text {
            color: var(--primary);
            white-space: nowrap;
        }

        .nav-menu {
            list-style: none;
            margin: 0 0 24px;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-menu .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            position: relative;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .nav-menu .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .nav-menu .nav-link:hover {
            background: rgba(30, 74, 122, 0.06);
            color: var(--primary);
        }

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

        .nav-menu .nav-link.active {
            background: rgba(30, 74, 122, 0.10);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-menu .nav-link.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            background: var(--primary);
            border-radius: 0 2px 2px 0;
        }

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

        .nav-contact {
            margin-top: auto;
            background: #FFFFFF;
            border: 1px solid var(--divide);
            border-radius: var(--radius);
            padding: 16px 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .nav-contact p {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.4;
        }

        .nav-contact p:last-child {
            margin-bottom: 0;
        }

        .nav-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        /* 移动端顶部栏 */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            height: 60px;
            background: #FFFFFF;
            border-bottom: 1px solid var(--divide);
            z-index: 1050;
            align-items: center;
            padding: 0 16px;
            box-shadow: 0 2px 8px rgba(26, 35, 51, 0.04);
        }

        .mobile-header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text);
            font-size: 18px;
            font-weight: 700;
        }

        .mobile-brand .nav-logo-icon {
            width: 30px;
            height: 30px;
            font-size: 15px;
            border-radius: 8px;
        }

        .mobile-toggle {
            background: transparent;
            border: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .mobile-toggle:hover {
            background: rgba(30, 74, 122, 0.06);
        }

        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(26, 35, 51, 0.5);
            z-index: 1049;
            backdrop-filter: blur(2px);
        }

        @media (max-width: 991.98px) {
            .site-nav {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                width: 280px;
                box-shadow: 4px 0 20px rgba(26, 35, 51, 0.1);
            }

            .site-nav.open {
                transform: translateX(0);
            }

            .nav-overlay.show {
                display: block;
            }

            .mobile-header {
                display: flex;
            }
        }

        /* ========== 内容区布局 ========== */
        .site-main {
            margin-left: var(--nav-width);
            min-height: 100vh;
            padding-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .site-main {
                margin-left: 0;
            }
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-nav {
            font-size: 13px;
            color: var(--text-muted);
            padding: 20px 0 0;
        }

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

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

        .breadcrumb-nav .sep {
            margin: 0 8px;
            color: #C0C7D2;
        }

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

        /* ========== 分类标题区 ========== */
        .cat-hero {
            padding: 40px 0 48px;
            background: var(--bg);
            border-bottom: 1px solid var(--divide);
        }

        .cat-hero-content {
            margin-top: 24px;
            max-width: 860px;
        }

        .cat-hero h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.5px;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cat-hero h1 span {
            color: var(--primary);
        }

        .cat-hero .cat-desc {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-body);
            margin-bottom: 0;
            max-width: 720px;
        }

        /* ========== 通用小节标题 ========== */
        .section-head {
            margin-bottom: 36px;
        }

        .section-bar {
            display: inline-block;
            width: 32px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ========== 核心服务卡片 ========== */
        .cat-services {
            padding: 64px 0;
            background: #FFFFFF;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            height: 100%;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

        .service-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(46, 107, 166, 0.4);
            transform: translateY(-2px);
        }

        .service-card .service-icon {
            width: 48px;
            height: 48px;
            background: rgba(30, 74, 122, 0.08);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-body);
            margin-bottom: 0;
        }

        /* ========== 横幅区 ========== */
        .cat-banner {
            padding: 0;
        }

        .banner-box {
            border-radius: 16px;
            padding: 48px 40px;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
            margin: 40px 24px;
            min-height: 220px;
            display: flex;
            align-items: center;
        }

        .banner-box::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(30, 74, 122, 0.88) 0%, rgba(30, 74, 122, 0.55) 100%);
            z-index: 1;
        }

        .banner-box .banner-content {
            position: relative;
            z-index: 2;
            max-width: 560px;
            color: #fff;
        }

        .banner-box h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

        .banner-box p {
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 0;
            color: rgba(255, 255, 255, 0.9);
        }

        @media (max-width: 767.98px) {
            .banner-box {
                margin: 28px 16px;
                padding: 32px 24px;
            }
        }

        /* ========== 服务流程 ========== */
        .cat-process {
            padding: 64px 0;
            background: var(--bg-alt);
        }

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

        .process-step {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            position: relative;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

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

        .process-step .step-num {
            font-size: 32px;
            font-weight: 700;
            color: rgba(30, 74, 122, 0.25);
            line-height: 1;
            margin-bottom: 16px;
        }

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

        .process-step p {
            font-size: 14px;
            color: var(--text-body);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .process-step::after {
            content: "\f054";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-light);
            font-size: 14px;
            z-index: 2;
        }

        .process-step:last-child::after {
            display: none;
        }

        @media (max-width: 1199.98px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step::after {
                display: none;
            }
        }

        @media (max-width: 575.98px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 适用场景 ========== */
        .cat-scenarios {
            padding: 64px 0;
            background: #FFFFFF;
        }

        .scenario-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            height: 100%;
            transition: all var(--transition);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(46, 107, 166, 0.4);
        }

        .scenario-card .scenario-img {
            position: relative;
            height: 180px;
            overflow: hidden;
            background: var(--bg-alt);
        }

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

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

        .scenario-card .scenario-body {
            padding: 24px;
        }

        .scenario-card .scenario-tag {
            display: inline-block;
            background: rgba(20, 168, 142, 0.10);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

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

        .scenario-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-body);
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .cat-faq {
            padding: 64px 0;
            background: var(--bg);
        }

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

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(46, 107, 166, 0.3);
        }

        .faq-item summary {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

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

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-body);
        }

        /* ========== CTA ========== */
        .cat-cta {
            padding: 64px 0;
            background: #FFFFFF;
        }

        .cta-box {
            background: var(--bg);
            border: 1px solid var(--divide);
            border-radius: 16px;
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px 4px 0 0;
        }

        .cta-box h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-box p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-box .btn-group-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            box-shadow: 0 2px 4px rgba(30, 74, 122, 0.2);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 74, 122, 0.25);
        }

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

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

        .btn-outline:hover {
            background: rgba(46, 107, 166, 0.08);
            color: var(--primary);
            border-color: var(--primary-light);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #142635;
            color: rgba(255, 255, 255, 0.75);
            margin-left: var(--nav-width);
            padding: 48px 0 24px;
            font-size: 14px;
        }

        .footer-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 36px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo .nav-logo-icon {
            width: 32px;
            height: 32px;
            font-size: 16px;
        }

        .footer-brand-name {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
        }

        .footer-col p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition);
        }

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            line-height: 1.5;
        }

        .footer-contact li i {
            color: var(--accent);
            margin-top: 3px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-domain {
            color: rgba(255, 255, 255, 0.35);
        }

        @media (max-width: 991.98px) {
            .site-footer {
                margin-left: 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ========== 响应式调整 ========== */
        @media (max-width: 1199.98px) {
            .site-nav {
                width: 200px;
            }
            .site-main {
                margin-left: 200px;
            }
            .site-footer {
                margin-left: 200px;
            }
            .cat-hero h1 {
                font-size: 30px;
            }
        }

        @media (max-width: 991.98px) {
            .site-main {
                margin-left: 0;
            }
            .cat-hero {
                padding: 28px 0 36px;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .cat-services,
            .cat-process,
            .cat-scenarios,
            .cat-faq,
            .cat-cta {
                padding: 48px 0;
            }
        }

        @media (max-width: 767.98px) {
            .service-card {
                padding: 24px 20px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h3 {
                font-size: 22px;
            }
            .btn {
                width: 100%;
            }
            .btn-group-cta {
                flex-direction: column;
            }
        }

        @media (max-width: 575.98px) {
            .cat-hero h1 {
                font-size: 22px;
            }
            .section-head h2 {
                font-size: 21px;
            }
        }