/* roulang page: index */
:root {
            --primary: #1D4E9F;
            --primary-dark: #143A78;
            --primary-50: #EAF0F9;
            --accent: #C9A96A;
            --accent-hover: #B08D4F;
            --bg-page: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-deep: #101D33;
            --text-main: #1F2937;
            --text-muted: #66788F;
            --border: #DFE5EF;
            --radius-card: 14px;
            --radius-btn: 6px;
            --radius-img: 10px;
            --shadow-card: 0 6px 24px rgba(16,29,51,.07);
            --shadow-hover: 0 12px 40px rgba(16,29,51,.13);
            --container-w: 1280px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .badge {
            display: inline-block;
            border-radius: 4px;
            padding: 2px 10px;
            font-size: 13px;
            font-weight: 500;
            line-height: 1.6;
        }
        .badge-gold {
            background: var(--accent);
            color: var(--bg-deep);
            border: 1px solid rgba(201, 169, 106, .3);
        }
        .badge-primary {
            background: var(--primary-50);
            color: var(--primary);
            border: 1px solid rgba(29, 78, 159, .12);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 16px;
            line-height: 1.4;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .28s ease;
            gap: 8px;
        }
        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--bg-deep);
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--bg-deep);
            box-shadow: 0 6px 18px rgba(201, 169, 106, .35);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(29, 78, 159, .3);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .75);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
        }
        .section-pad {
            padding: 96px 0;
        }
        .section-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin: 0;
            letter-spacing: -.02em;
        }
        .section-link {
            color: var(--primary);
            font-weight: 500;
            font-size: 15px;
            border-bottom: 2px solid transparent;
            padding-bottom: 2px;
            white-space: nowrap;
        }
        .section-link:hover {
            border-bottom-color: var(--accent);
            color: var(--primary-dark);
        }

        /* 顶部活动条 */
        .activity-bar {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .85);
            height: 36px;
            font-size: 13px;
            transition: transform .3s ease, max-height .3s ease, opacity .3s;
            overflow: hidden;
        }
        .activity-bar.collapsed {
            transform: translateY(-100%);
            max-height: 0;
            opacity: 0;
        }
        .activity-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .status-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #E6C98C;
            box-shadow: 0 0 0 3px rgba(230, 201, 140, .25);
            display: inline-block;
        }
        .status-badge .status-text {
            color: rgba(255, 255, 255, .75);
        }
        .activity-right {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .cd-time {
            color: var(--accent);
            font-weight: 600;
            font-family: "SF Mono", Consolas, "Courier New", monospace;
            letter-spacing: 1px;
        }
        .hotline {
            color: rgba(255, 255, 255, .65);
        }

        /* 主导航 */
        .main-nav {
            background: #fff;
            height: 72px;
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 2px 16px rgba(16, 29, 51, .06);
            transition: box-shadow .3s;
        }
        .main-nav .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 21px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -.01em;
            white-space: nowrap;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(145deg, var(--primary) 0%, var(--primary-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
            margin: 0;
            padding: 0;
            list-style: none;
            height: 100%;
        }
        .nav-menu > li {
            height: 100%;
            display: flex;
            align-items: center;
        }
        .nav-menu > li > a {
            display: inline-flex;
            align-items: center;
            height: 100%;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 500;
            position: relative;
            padding: 0 2px;
            border-bottom: 3px solid transparent;
            transition: color .2s, border-color .2s;
        }
        .nav-menu > li > a:hover {
            color: var(--primary);
        }
        .nav-menu > li > a.active {
            color: var(--primary);
            border-bottom-color: var(--accent);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-cta .btn {
            padding: 9px 24px;
            font-size: 15px;
        }
        .navbar-toggler {
            display: none;
            background: none;
            border: 0;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            border-radius: 6px;
        }
        .navbar-toggler:hover {
            background: var(--primary-50);
        }
        .navbar-toggler span,
        .navbar-toggler::before,
        .navbar-toggler::after {
            content: "";
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }
        .navbar-toggler::before {
            margin-bottom: 6px;
        }
        .navbar-toggler::after {
            margin-top: 6px;
        }

        /* Hero */
        .hero-section {
            background: linear-gradient(90deg, rgba(16, 29, 51, .85) 0%, rgba(16, 29, 51, .42) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 720px;
            display: flex;
            align-items: center;
            position: relative;
        }
        .hero-content {
            padding: 120px 0 140px;
            max-width: 760px;
        }
        .hero-content h1 {
            color: #fff;
            font-size: 44px;
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 20px;
            letter-spacing: -.02em;
        }
        .hero-sub {
            color: rgba(255, 255, 255, .82);
            font-size: 18px;
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 560px;
        }
        .hero-cta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-cards {
            position: relative;
            margin-top: -20px;
            z-index: 5;
        }
        .hero-card-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            padding: 26px 24px;
            text-align: center;
            height: 100%;
            transition: box-shadow .3s;
        }
        .hero-card-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .hero-card-item .hero-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-50);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            color: var(--primary);
        }
        .hero-card-item .hero-num {
            font-size: 34px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -.02em;
        }
        .hero-card-item .hero-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 核心服务 */
        .service-section {
            background: #fff;
        }
        .service-card {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            padding: 32px 30px;
            height: 100%;
            position: relative;
            transition: box-shadow .3s;
            overflow: hidden;
        }
        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity .3s;
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .service-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--primary-50);
            display: flex;
            flex: 0 0 56px;
            align-items: center;
            justify-content: center;
            color: var(--primary);
        }
        .service-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .service-body p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .service-tag {
            background: var(--primary-50);
            color: var(--primary);
            border-radius: 4px;
            font-size: 13px;
            padding: 3px 10px;
            border: 1px solid rgba(29, 78, 159, .08);
        }

        /* 优势数据区 */
        .stats-section {
            background: var(--bg-deep);
            padding: 80px 0;
        }
        .stat-item {
            text-align: center;
            padding: 20px 0;
        }
        .stat-num {
            font-size: 38px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -.01em;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            margin-top: 6px;
        }

        /* 案例 */
        .case-section {
            background: var(--bg-page);
        }
        .case-feature {
            display: block;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            height: 100%;
            overflow: hidden;
            transition: box-shadow .3s;
        }
        .case-feature:hover {
            box-shadow: var(--shadow-hover);
        }
        .case-feature .case-img {
            height: 280px;
            overflow: hidden;
            position: relative;
            background: var(--primary-50);
        }
        .case-feature .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }
        .case-feature:hover .case-img img {
            transform: scale(1.03);
        }
        .case-feature .case-body {
            padding: 24px 24px 28px;
        }
        .case-feature .case-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .case-feature .case-body p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 12px;
        }
        .case-feature .case-time {
            font-size: 14px;
            color: var(--text-muted);
        }
        .case-mini {
            display: flex;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            padding: 20px;
            height: calc(50% - 12px);
            align-items: center;
            transition: box-shadow .3s;
        }
        .case-mini + .case-mini {
            margin-top: 24px;
        }
        .case-mini:hover {
            box-shadow: var(--shadow-hover);
        }
        .case-mini .mini-img {
            flex: 0 0 120px;
            width: 120px;
            height: 90px;
            border-radius: 10px;
            overflow: hidden;
            background: var(--primary-50);
        }
        .case-mini .mini-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-mini .mini-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .case-mini .mini-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 解决方案 */
        .solution-section {
            background: #fff;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--bg-deep);
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(201, 169, 106, .28);
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }
        .step-arrow {
            position: absolute;
            top: 24px;
            right: -18px;
            color: var(--border);
            font-size: 18px;
            z-index: 2;
            display: none;
        }
        .solution-bar {
            background: var(--primary-50);
            border-radius: 14px;
            padding: 36px;
            display: flex;
            align-items: center;
            gap: 36px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        .solution-bar-text {
            flex: 1;
            min-width: 260px;
        }
        .solution-bar-text h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .solution-bar-text p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .solution-bar-img {
            flex: 0 0 200px;
            border-radius: 10px;
            overflow: hidden;
        }
        .solution-bar-img img {
            width: 100%;
            height: 130px;
            object-fit: cover;
            border-radius: 10px;
        }

        /* 资讯动态 */
        .news-section {
            background: #fff;
        }
        .news-card {
            display: block;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            transition: box-shadow .3s;
        }
        .news-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .news-card .news-thumb {
            height: 250px;
            background: var(--primary-50);
            overflow: hidden;
        }
        .news-card .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }
        .news-card:hover .news-thumb img {
            transform: scale(1.03);
        }
        .news-card .news-body {
            padding: 26px 26px 30px;
        }
        .news-meta-top {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .news-date {
            font-size: 14px;
            color: var(--text-muted);
        }
        .news-body h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-body p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .read-more {
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-list-col {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .news-row {
            display: flex;
            align-items: center;
            gap: 18px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: box-shadow .3s;
        }
        .news-row:hover {
            box-shadow: var(--shadow-hover);
        }
        .news-row-content {
            flex: 1;
            min-width: 0;
        }
        .news-row-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }
        .news-row-content h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-row-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-arrow {
            color: var(--primary);
            font-size: 20px;
            flex-shrink: 0;
        }
        .news-empty {
            text-align: center;
            color: var(--text-muted);
            font-size: 16px;
            padding: 60px 0;
            background: #fafbfc;
            border-radius: 14px;
            border: 1px dashed var(--border);
        }

        /* FAQ */
        .faq-section {
            background: var(--primary-50);
        }
        .faq-section .container {
            max-width: 840px;
        }
        .accordion-item {
            background: #fff;
            border: 1px solid var(--border) !important;
            border-radius: 10px !important;
            margin-bottom: 14px;
            box-shadow: 0 2px 10px rgba(16, 29, 51, .03);
            overflow: hidden;
        }
        .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            padding: 20px 24px;
            background: #fff;
            border-radius: 0;
            box-shadow: none;
            position: relative;
            transition: color .2s, padding .2s;
        }
        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: #fff;
            box-shadow: none;
            border-left: 3px solid var(--accent);
            padding-left: 21px;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border);
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231D4E9F'%3E%3Cpath d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3E%3C/svg%3E");
            transition: transform .3s;
        }
        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .accordion-body {
            padding: 4px 24px 22px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.75;
        }

        /* 联系 */
        .contact-section {
            background: #fff;
        }
        .contact-info-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }
        .contact-info-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 10px 0;
            color: var(--text-main);
        }
        .contact-info-list .ci-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--primary-50);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--primary);
        }
        .contact-info-list .ci-text {
            font-size: 15px;
            line-height: 1.7;
        }
        .contact-info-list .ci-label {
            font-size: 13px;
            color: var(--text-muted);
            display: block;
        }
        .contact-dark-card {
            background: var(--bg-deep);
            border-radius: 14px;
            padding: 28px;
            color: rgba(255, 255, 255, .82);
        }
        .contact-dark-card h4 {
            color: #fff;
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .contact-dark-card p {
            font-size: 14px;
            margin-bottom: 4px;
            color: rgba(255, 255, 255, .6);
        }
        .form-control,
        .form-select {
            border-radius: 8px;
            border: 1px solid var(--border);
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text-main);
            background: #fff;
            transition: border-color .2s, box-shadow .2s;
        }
        .form-control:focus,
        .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .2);
        }
        .form-control::placeholder {
            color: #a6b4c8;
        }
        .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        /* 页脚 */
        .footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .82);
            border-top: 1px solid rgba(201, 169, 106, .3);
        }
        .footer-top {
            padding: 64px 0 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }
        .footer-brand span {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            line-height: 1.7;
            max-width: 260px;
        }
        .footer h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            transition: color .2s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.8;
            list-style: none;
            display: flex;
            gap: 10px;
            margin-bottom: 8px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Focus 状态 */
        a:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
            border-radius: 4px;
        }

        /* 响应式 */
        @media (max-width: 1199.98px) {
            .container {
                max-width: 1200px;
            }
            .hero-section {
                min-height: 640px;
            }
        }
        @media (max-width: 991.98px) {
            .navbar-toggler {
                display: inline-flex;
            }
            .nav-menu {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                min-height: 100vh;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                padding: 32px 24px;
                height: auto;
                gap: 8px;
                box-shadow: 0 12px 30px rgba(16, 29, 51, .12);
                transform: translateY(-120%);
                transition: transform .35s ease;
                z-index: 1020;
            }
            .nav-menu.open {
                transform: translateY(0);
            }
            .nav-menu > li {
                height: auto;
            }
            .nav-menu > li > a {
                display: block;
                height: auto;
                padding: 14px 8px;
                font-size: 17px;
                border-bottom: 1px solid var(--border);
                width: 100%;
                border-radius: 0;
            }
            .nav-menu > li > a.active {
                border-bottom: 1px solid var(--accent);
                color: var(--primary);
            }
            .nav-cta {
                display: none;
            }
            .hero-section {
                min-height: 560px;
            }
            .hero-content {
                padding: 90px 0 110px;
            }
            .hero-content h1 {
                font-size: 36px;
            }
            .service-section .row > div {
                margin-bottom: 24px;
            }
            .solution-bar {
                flex-direction: column;
                gap: 20px;
            }
            .solution-bar-img {
                flex: 0 0 auto;
                width: 100%;
                max-width: 320px;
            }
            .contact-section .row > div:first-child {
                margin-bottom: 40px;
            }
        }
        @media (max-width: 767.98px) {
            .section-pad {
                padding: 56px 0;
            }
            .activity-bar {
                display: block;
                height: 32px;
            }
            .activity-bar .container {
                justify-content: center;
            }
            .activity-right {
                display: none;
            }
            .hero-section {
                min-height: 480px;
            }
            .hero-content {
                padding: 60px 0 90px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 16px;
            }
            .hero-cta .btn {
                width: 100%;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .news-card .news-thumb {
                height: 200px;
            }
            .news-list-col {
                gap: 16px;
            }
        }
        @media (max-width: 575.98px) {
            .container {
                padding: 0 20px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .brand {
                font-size: 18px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .service-card {
                padding: 24px 20px;
                flex-direction: column;
                gap: 16px;
            }
            .service-icon {
                width: 48px;
                height: 48px;
            }
            .card {
                border-radius: 12px;
            }
            .case-feature .case-img {
                height: 220px;
            }
            .case-mini {
                flex-direction: column;
                align-items: flex-start;
                height: auto;
            }
            .case-mini .mini-img {
                width: 100%;
                height: 120px;
                flex: 0 0 auto;
            }
            .solution-bar {
                padding: 24px;
            }
            .step-item {
                padding: 10px 0;
            }
            .footer-top {
                padding: 48px 0 24px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
            .btn {
                padding: 11px 22px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #1D4E9F;
    --primary-dark: #143A78;
    --primary-50: #EAF0F9;
    --accent: #C9A96A;
    --accent-hover: #B08D4F;
    --bg-page: #F5F7FA;
    --bg-card: #FFFFFF;
    --bg-deep: #101D33;
    --text-main: #1F2937;
    --text-muted: #66788F;
    --border: #DFE5EF;
    --radius-card: 14px;
    --radius-btn: 6px;
    --radius-img: 10px;
    --shadow-card: 0 6px 24px rgba(16,29,51,.07);
    --shadow-hover: 0 12px 40px rgba(16,29,51,.13);
    --container-w: 1280px;
    --transition: .25s ease;
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
    background: var(--bg-page);
    color: var(--text-main);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
a {
    text-decoration: none;
    color: var(--primary);
    transition: color var(--transition);
}
a:hover {
    color: var(--primary-dark);
}
img {
    max-width: 100%;
    display: block;
    height: auto;
}
button {
    font-family: inherit;
    cursor: pointer;
}
ul,
ol {
    list-style: none;
}
.container {
    max-width: var(--container-w);
}
:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
}

/* ===== 按钮体系 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    transition: all var(--transition);
    gap: 8px;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover,
.btn-primary:focus {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    box-shadow: 0 4px 14px rgba(29, 78, 159, .3);
}
.btn-accent {
    background: var(--accent);
    color: var(--bg-deep);
    border-color: var(--accent);
    font-weight: 700;
}
.btn-accent:hover,
.btn-accent:focus {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: var(--bg-deep);
    box-shadow: 0 4px 16px rgba(201, 169, 106, .35);
}
.btn-outline-primary {
    border: 1px solid var(--primary);
    color: var(--primary);
    background: transparent;
}
.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background: var(--primary-50);
    color: var(--primary-dark);
    border-color: var(--primary-dark);
}
.btn-outline-light {
    border: 1px solid rgba(255, 255, 255, .7);
    color: #fff;
    background: transparent;
}
.btn-outline-light:hover,
.btn-outline-light:focus {
    background: rgba(255, 255, 255, .12);
    color: #fff;
    border-color: #fff;
}

/* ===== 徽章 / 标签 ===== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.5;
}
.badge-accent {
    background: var(--accent);
    color: var(--bg-deep);
    border: 1px solid rgba(201, 169, 106, .4);
}
.badge-soft {
    background: var(--primary-50);
    color: var(--primary);
    border: 1px solid rgba(29, 78, 159, .15);
}
.tag {
    display: inline-block;
    padding: 6px 18px;
    background: var(--primary-50);
    color: var(--primary);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid transparent;
    transition: all var(--transition);
}
.tag:hover {
    background: var(--primary);
    color: #fff;
}

/* ===== 表单控件 ===== */
.form-control,
.form-select {
    border-radius: var(--radius-btn);
    border: 1px solid var(--border);
    padding: 12px 16px;
    font-size: 15px;
    color: var(--text-main);
    background: #fff;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
    outline: none;
}
.form-control::placeholder {
    color: var(--text-muted);
    opacity: .7;
}
.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
}

/* ===== 导航 ===== */
.main-nav {
    position: sticky;
    top: 0;
    z-index: 999;
    background: #fff;
    box-shadow: var(--shadow-card);
    height: 72px;
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    padding: 0 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -.01em;
    white-space: nowrap;
}
.brand:hover {
    color: var(--primary);
}
.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: .02em;
    flex-shrink: 0;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
    margin: 0;
    padding: 0;
}
.nav-menu li a {
    display: block;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    padding: 6px 2px;
    position: relative;
    transition: color var(--transition);
}
.nav-menu li a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}
.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--primary);
}
.nav-menu li a:hover::after,
.nav-menu li a.active::after {
    transform: scaleX(1);
}
.nav-cta .btn-accent {
    padding: 9px 22px;
    font-size: 14px;
    border-radius: var(--radius-btn);
}
.navbar-toggler {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    position: relative;
}
.navbar-toggler span,
.navbar-toggler span::before,
.navbar-toggler span::after {
    content: "";
    position: absolute;
    left: 10px;
    width: 22px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: all var(--transition);
}
.navbar-toggler span {
    top: 21px;
}
.navbar-toggler span::before {
    top: -6px;
}
.navbar-toggler span::after {
    top: 6px;
}
.navbar-toggler[aria-expanded="true"] span {
    background: transparent;
}
.navbar-toggler[aria-expanded="true"] span::before {
    top: 0;
    transform: rotate(45deg);
}
.navbar-toggler[aria-expanded="true"] span::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ===== 面包屑 ===== */
.breadcrumb-wrap {
    margin: 28px 0 24px;
}
.breadcrumb {
    margin: 0;
    padding: 0;
    background: transparent;
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    font-size: 14px;
}
.breadcrumb-item {
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
}
.breadcrumb-item a {
    color: var(--primary);
    font-weight: 500;
}
.breadcrumb-item a:hover {
    color: var(--primary-dark);
}
.breadcrumb-item.active {
    color: var(--text-muted);
    max-width: 360px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: var(--border);
    padding: 0 6px;
}

/* ===== 文章页主区 ===== */
.article-page {
    padding: 0 0 100px;
    min-height: 600px;
}
.article-detail {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    padding: 56px 64px;
    max-width: 1000px;
    margin: 0 auto;
}
.article-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 32px;
    margin-bottom: 36px;
}
.article-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-main);
    letter-spacing: -.02em;
    margin-bottom: 20px;
    word-break: break-word;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--text-muted);
}
.article-meta .badge {
    font-size: 13px;
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.meta-item::before {
    content: "";
    width: 4px;
    height: 4px;
    background: var(--border);
    border-radius: 50%;
    margin-right: 4px;
}
.article-meta .badge + .meta-item::before {
    display: none;
}

/* ===== 正文 ===== */
.article-body {
    max-width: 780px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-main);
}
.article-body > * + * {
    margin-top: 24px;
}
.article-body h2 {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--text-main);
    padding-left: 14px;
    border-left: 4px solid var(--accent);
    margin-top: 40px;
    margin-bottom: 16px;
}
.article-body h3 {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.5;
    margin-top: 32px;
    margin-bottom: 12px;
}
.article-body p {
    margin-bottom: 24px;
    line-height: 1.9;
}
.article-body ul,
.article-body ol {
    padding-left: 24px;
    margin-bottom: 24px;
}
.article-body ul li {
    list-style: disc;
    margin-bottom: 8px;
}
.article-body ol li {
    list-style: decimal;
    margin-bottom: 8px;
}
.article-body img {
    border-radius: var(--radius-img);
    margin: 28px auto;
    box-shadow: var(--shadow-card);
}
.article-body blockquote {
    background: var(--primary-50);
    border-left: 4px solid var(--primary);
    padding: 20px 24px;
    border-radius: 0 var(--radius-card) var(--radius-card) 0;
    margin: 28px 0;
    color: var(--text-muted);
    font-size: 15px;
}
.article-body a {
    color: var(--primary);
    text-decoration: underline;
}
.article-body a:hover {
    color: var(--primary-dark);
}
.article-body figure {
    margin: 28px 0;
}
.article-body figcaption {
    text-align: center;
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 8px;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
}
.article-body th,
.article-body td {
    border: 1px solid var(--border);
    padding: 12px 16px;
    text-align: left;
}
.article-body th {
    background: var(--primary-50);
    font-weight: 600;
}

/* ===== 文末标签 ===== */
.article-tags {
    max-width: 780px;
    margin: 48px auto 0;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

/* ===== 内容未找到 ===== */
.not-found {
    text-align: center;
    padding: 80px 40px;
    background: var(--bg-card);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    max-width: 700px;
    margin: 0 auto;
}
.not-found h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 16px;
}
.not-found p {
    color: var(--text-muted);
    margin-bottom: 32px;
}

/* ===== 相关推荐 ===== */
.related-section {
    margin-top: 64px;
}
.related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}
.related-header h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-main);
    position: relative;
    padding-left: 16px;
}
.related-header h2::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    width: 4px;
    height: 22px;
    background: var(--accent);
    border-radius: 2px;
}
.more-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
}
.more-link:hover {
    color: var(--primary-dark);
}
.related-card {
    background: var(--bg-card);
    border-radius: var(--radius-card);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: box-shadow var(--transition);
}
.related-card:hover {
    box-shadow: var(--shadow-hover);
}
.related-card .card-img {
    height: 180px;
    overflow: hidden;
    background: var(--primary-50);
}
.related-card .card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .4s ease;
}
.related-card:hover .card-img img {
    transform: scale(1.03);
}
.related-card .card-content {
    padding: 20px 22px 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.related-card h3 {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.55;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card h3 a {
    color: var(--text-main);
    transition: color var(--transition);
}
.related-card h3 a:hover {
    color: var(--primary);
}
.related-card .card-date {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: auto;
    padding-top: 8px;
}

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

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-deep);
    color: rgba(255, 255, 255, .82);
    margin-top: 0;
}
.footer-top {
    border-top: 1px solid rgba(201, 169, 106, .5);
    padding: 64px 0 40px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}
.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, .55);
    line-height: 1.7;
}
.footer h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}
.footer h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
}
.footer-links {
    padding: 0;
    margin: 0;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    color: rgba(255, 255, 255, .72);
    font-size: 14px;
    transition: color var(--transition);
}
.footer-links a:hover {
    color: var(--accent);
}
.footer-contact li {
    color: rgba(255, 255, 255, .72);
    font-size: 14px;
    line-height: 1.7;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, .55);
}
.footer-bottom a {
    color: rgba(255, 255, 255, .72);
}
.footer-bottom a:hover {
    color: var(--accent);
}

/* ===== Bootstrap 覆盖 ===== */
.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    background: var(--bg-card);
}
.accordion-button {
    box-shadow: none !important;
    border-radius: 8px !important;
}
.accordion-button:not(.collapsed) {
    background: var(--primary-50);
    color: var(--primary);
}
.accordion-button:focus {
    box-shadow: 0 0 0 3px rgba(29, 78, 159, .2);
}
.accordion-item {
    border: 1px solid var(--border);
    border-radius: 8px !important;
    overflow: hidden;
    margin-bottom: 12px;
}
.accordion-button::after {
    background-size: 16px;
    transition: transform var(--transition);
}
.accordion-button:not(.collapsed)::after {
    transform: rotate(135deg);
}
.list-group-item {
    border-color: var(--border);
    color: var(--text-main);
    padding: 14px 20px;
}
.list-group-item:first-child {
    border-radius: var(--radius-card) var(--radius-card) 0 0;
}
.list-group-item:last-child {
    border-radius: 0 0 var(--radius-card) var(--radius-card);
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
    .container {
        max-width: 1200px;
    }
}
@media (max-width: 991px) {
    .article-detail {
        padding: 40px 36px;
    }
    .article-title {
        font-size: 28px;
    }
}
@media (max-width: 767px) {
    .main-nav {
        height: 64px;
    }
    .nav-wrap {
        height: 64px;
        padding: 0 12px;
    }
    .navbar-toggler {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 16px 24px 24px;
        box-shadow: 0 12px 30px rgba(16, 29, 51, .12);
        border-top: 1px solid var(--border);
    }
    .nav-menu.show {
        display: flex;
    }
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--border);
    }
    .nav-menu li:last-child {
        border-bottom: none;
    }
    .nav-menu li a {
        padding: 14px 0;
        font-size: 16px;
        width: 100%;
    }
    .nav-menu li a::after {
        display: none;
    }
    .nav-cta {
        display: none;
    }
    .brand {
        font-size: 17px;
        gap: 8px;
    }
    .brand-icon {
        width: 34px;
        height: 34px;
        font-size: 12px;
    }
    .article-page {
        padding: 0 0 64px;
    }
    .breadcrumb-wrap {
        margin: 16px 0 16px;
        padding: 0 12px;
    }
    .article-detail {
        padding: 28px 20px;
        border-radius: 12px;
        margin-left: 12px;
        margin-right: 12px;
    }
    .article-title {
        font-size: 24px;
        line-height: 1.5;
    }
    .article-meta {
        gap: 10px;
        font-size: 13px;
    }
    .article-body {
        font-size: 15px;
        line-height: 1.85;
    }
    .article-body h2 {
        font-size: 20px;
    }
    .article-body h3 {
        font-size: 18px;
    }
    .article-body blockquote {
        padding: 16px 20px;
    }
    .article-tags {
        gap: 8px;
        margin-top: 32px;
    }
    .tag {
        padding: 5px 14px;
        font-size: 13px;
    }
    .related-section {
        margin-top: 48px;
        padding: 0 12px;
    }
    .related-header {
        margin-bottom: 20px;
    }
    .related-header h2 {
        font-size: 22px;
    }
    .related-card .card-img {
        height: 160px;
    }
    .back-wrap {
        margin-top: 40px;
    }
    .footer-top {
        padding: 48px 0 24px;
    }
    .footer-bottom {
        justify-content: center;
        text-align: center;
        padding: 20px 16px;
    }
}
@media (max-width: 575px) {
    .breadcrumb-item + .breadcrumb-item::before {
        padding: 0 4px;
    }
    .breadcrumb-item.active {
        max-width: 200px;
    }
    .article-detail {
        padding: 22px 16px;
        margin-left: 8px;
        margin-right: 8px;
    }
    .article-title {
        font-size: 22px;
    }
    .related-card {
        margin-bottom: 16px;
    }
    .btn {
        padding: 10px 22px;
        font-size: 14px;
    }
    .back-wrap .btn {
        width: 100%;
    }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1D4E9F;
            --primary-dark: #143A78;
            --primary-50: #EAF0F9;
            --accent: #C9A96A;
            --accent-hover: #B08D4F;
            --bg-page: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-deep: #101D33;
            --text-main: #1F2937;
            --text-muted: #66788F;
            --border: #DFE5EF;
            --radius-card: 14px;
            --radius-btn: 6px;
            --radius-img: 10px;
            --shadow-card: 0 6px 24px rgba(16, 29, 51, .07);
            --shadow-hover: 0 12px 40px rgba(16, 29, 51, .13);
            --container-w: 1280px;
        }

        /* ===== 基础重置 ===== */
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: var(--primary); transition: color .2s; }
        a:hover { color: var(--primary-dark); }
        ul, ol { list-style: none; margin: 0; padding: 0; }
        h1, h2, h3, h4, h5, h6 { margin: 0 0 .5rem; color: var(--text-main); line-height: 1.35; font-weight: 700; }
        p { margin: 0 0 1rem; }
        .container { max-width: var(--container-w); padding-left: 20px; padding-right: 20px; }

        /* ===== 焦点态 ===== */
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
            outline: none;
            border-radius: 4px;
        }

        /* ===== Bootstrap 重写 ===== */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            padding: 12px 28px;
            border: 1px solid transparent;
            transition: all .25s ease;
            line-height: 1.4;
            font-size: 16px;
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover, .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(29, 78, 159, .3);
            color: #fff;
        }
        .btn-outline-primary {
            color: var(--primary);
            border-color: var(--primary);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: var(--primary-50);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        .navbar { padding: 0; }
        .nav-link { color: var(--text-main); font-size: 16px; font-weight: 500; }
        .nav-link:hover, .nav-link.active { color: var(--primary); }
        .navbar-toggler { border: 1px solid var(--border); border-radius: 6px; }
        .navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(29, 78, 159, .25); }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }
        .accordion-button {
            background: #fff;
            color: var(--text-main);
            font-weight: 600;
            border: none;
            box-shadow: none;
            padding: 16px 20px;
            font-size: 16px;
            border-radius: 0 !important;
            transition: color .2s;
        }
        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: #fff;
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
            border-radius: 4px;
        }
        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 10px !important;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .accordion-body { color: var(--text-muted); padding: 0 20px 18px; font-size: 15px; }
        .form-control, .form-select {
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 12px 14px;
            font-size: 15px;
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
        }
        .badge {
            background: var(--primary-50);
            color: var(--primary);
            border: 1px solid rgba(29, 78, 159, .12);
            border-radius: 4px;
            font-weight: 600;
            padding: 4px 10px;
            font-size: 13px;
        }
        .breadcrumb { --bs-breadcrumb-divider: '›'; margin-bottom: 0; }
        .breadcrumb-item a { color: var(--text-muted); }
        .breadcrumb-item.active { color: var(--text-muted); }
        .list-group-item {
            border-color: var(--border);
            color: var(--text-main);
            background: #fff;
        }
        .list-group-item.active {
            background: var(--primary);
            border-color: var(--primary);
        }

        /* ===== 按钮扩展 ===== */
        .btn-accent {
            background: var(--accent);
            color: var(--bg-deep);
            font-weight: 600;
        }
        .btn-accent:hover, .btn-accent:focus {
            background: var(--accent-hover);
            color: var(--bg-deep);
            box-shadow: 0 4px 14px rgba(201, 169, 106, .35);
        }
        .btn-outline-light {
            border: 1px solid rgba(255, 255, 255, .7);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }
        .btn-block { display: block; width: 100%; text-align: center; }

        /* ===== 导航 ===== */
        .main-nav {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #fff;
            box-shadow: var(--shadow-card);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            white-space: nowrap;
        }
        .brand:hover { color: var(--primary); }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            flex-shrink: 0;
            letter-spacing: .02em;
        }
        .nav-menu {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        .nav-menu a {
            display: inline-block;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 0;
            position: relative;
            border-bottom: 3px solid transparent;
            transition: color .2s;
        }
        .nav-menu a:hover { color: var(--primary); }
        .nav-menu a.active {
            color: var(--primary);
            border-bottom-color: var(--accent);
        }
        .nav-cta { flex-shrink: 0; }
        .navbar-toggler {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: 6px;
            background: #fff;
            position: relative;
            cursor: pointer;
        }
        .navbar-toggler span,
        .navbar-toggler::before,
        .navbar-toggler::after {
            content: '';
            position: absolute;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: .3s;
        }
        .navbar-toggler span { top: 21px; }
        .navbar-toggler::before { top: 14px; }
        .navbar-toggler::after { bottom: 14px; }

        /* ===== 分类页 Hero ===== */
        .category-hero {
            background: linear-gradient(90deg, rgba(16, 29, 51, .85) 0%, rgba(16, 29, 51, .45) 100%),
                url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 240px;
            display: flex;
            align-items: center;
            padding: 48px 0;
            color: #fff;
        }
        .category-hero h1 {
            color: #fff;
            font-size: 38px;
            font-weight: 700;
            letter-spacing: -.02em;
            margin-bottom: 12px;
        }
        .category-hero p {
            color: rgba(255, 255, 255, .86);
            font-size: 16px;
            max-width: 680px;
            margin: 0;
        }

        /* ===== 主内容区 ===== */
        .category-main { padding: 56px 0 72px; }
        .section-head { margin-bottom: 32px; }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
            position: relative;
            padding-left: 16px;
        }
        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 2px;
            background: var(--accent);
        }
        .section-head p { color: var(--text-muted); margin: 0; }

        /* ===== 指南卡片 ===== */
        .guide-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            position: relative;
            transition: box-shadow .3s, border-color .3s;
        }
        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity .3s;
            z-index: 2;
        }
        .guide-card:hover { box-shadow: var(--shadow-hover); border-color: var(--border); }
        .guide-card:hover::before { opacity: 1; }
        .guide-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .guide-card:hover .guide-card-img { transform: scale(1.03); }
        .guide-card-body { padding: 20px 20px 16px; }
        .guide-card-tag {
            display: inline-block;
            background: var(--primary-50);
            color: var(--primary);
            border: 1px solid rgba(29, 78, 159, .15);
            border-radius: 4px;
            padding: 2px 10px;
            font-size: 13px;
            margin-bottom: 10px;
            font-weight: 500;
        }
        .guide-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .guide-card-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .guide-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-muted);
            font-size: 13px;
            border-top: 1px solid #f0f3f7;
            padding-top: 12px;
        }

        /* ===== 流程步骤 ===== */
        .process-block {
            margin-top: 48px;
            background: var(--primary-50);
            border-radius: var(--radius-card);
            padding: 40px;
            border: 1px solid rgba(29, 78, 159, .08);
        }
        .process-block .section-head h2 { color: var(--primary-dark); }
        .step-list {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            position: relative;
            margin-top: 32px;
        }
        .step-list::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 8%;
            right: 8%;
            border-top: 2px dashed rgba(29, 78, 159, .25);
        }
        .step-item {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 10px;
        }
        .step-icon {
            display: inline-flex;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--bg-deep);
            font-weight: 700;
            font-size: 15px;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
            box-shadow: 0 4px 12px rgba(201, 169, 106, .35);
            position: relative;
        }
        .step-item h3 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
        .step-item p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
            max-width: 190px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-block { margin-top: 48px; }
        .faq-block .section-head { margin-bottom: 24px; }

        /* ===== 侧栏 ===== */
        .sidebar { padding-left: 12px; }
        .sidebar-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            margin-bottom: 24px;
        }
        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-50);
        }
        .sidebar-list li { margin-bottom: 2px; }
        .sidebar-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 8px;
            color: var(--text-muted);
            border-radius: 6px;
            font-size: 14px;
            transition: background .2s, color .2s;
        }
        .sidebar-list a:hover {
            color: var(--primary);
            background: var(--primary-50);
        }
        .sidebar-list a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-50);
        }
        .sidebar-list a span { font-size: 16px; color: var(--accent); }
        .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag-cloud a {
            display: inline-block;
            background: var(--primary-50);
            color: var(--primary);
            border: 1px solid rgba(29, 78, 159, .1);
            border-radius: 4px;
            padding: 4px 12px;
            font-size: 13px;
            transition: background .2s, color .2s;
        }
        .tag-cloud a:hover {
            background: var(--primary);
            color: #fff;
        }
        .contact-card { border-top: 3px solid var(--accent); }
        .contact-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 10px; }
        .contact-tel {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin: 12px 0 16px;
            letter-spacing: .02em;
        }
        .contact-card .btn { margin-top: 6px; }

        /* ===== CTA 区 ===== */
        .category-cta {
            background: var(--bg-deep);
            padding: 64px 0;
            text-align: center;
        }
        .category-cta h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -.02em;
        }
        .category-cta p {
            color: rgba(255, 255, 255, .72);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .82);
        }
        .footer-top {
            border-top: 1px solid rgba(201, 169, 106, .3);
            padding: 56px 0 24px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
        }
        .footer-brand .brand-icon {
            background: var(--accent);
            color: var(--bg-deep);
        }
        .footer-desc {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            margin-top: 12px;
            max-width: 220px;
        }
        .footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            transition: color .2s;
        }
        .footer-links a:hover { color: #fff; }
        .footer-contact li { font-size: 14px; line-height: 1.8; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: rgba(255, 255, 255, .45);
            font-size: 13px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, .55);
            margin-left: 12px;
        }
        .footer-bottom a:hover { color: #fff; }

        /* ===== 响应式 ===== */
        @media (max-width: 1199px) {
            .container { max-width: 1200px; }
            .category-hero { min-height: 230px; }
        }

        @media (max-width: 991px) {
            .category-main { padding: 40px 0 56px; }
            .step-list { flex-direction: column; gap: 28px; }
            .step-list::before { display: none; }
            .step-item { text-align: center; }
            .step-item p { margin: 0 auto; }
            .sidebar { padding-left: 0; margin-top: 32px; }
            .process-block { padding: 28px 24px; }
        }

        @media (max-width: 767px) {
            .main-nav { position: sticky; }
            .navbar-toggler { display: block; }
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 20px 24px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 18px;
                box-shadow: 0 12px 32px rgba(16, 29, 51, .1);
                border-top: 1px solid var(--primary-50);
            }
            .nav-menu.show { display: flex; }
            .nav-menu a { width: 100%; font-size: 16px; padding: 8px 0; }
            .nav-menu a.active { border-bottom: none; color: var(--primary); }
            .nav-menu a.active::after {
                content: '';
                display: block;
                width: 24px;
                height: 3px;
                background: var(--accent);
                border-radius: 2px;
                margin-top: 4px;
            }
            .nav-cta {
                display: none;
                position: absolute;
                top: auto;
                left: 0;
                right: 0;
                padding: 0 24px 20px;
                background: #fff;
            }
            .nav-cta.show { display: block; }
            .nav-cta .btn { width: 100%; }
            .category-hero { min-height: 200px; padding: 36px 0; }
            .category-hero h1 { font-size: 26px; }
            .category-hero p { font-size: 14px; }
            .section-head h2 { font-size: 24px; }
            .guide-card-img { height: 160px; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
        }

        @media (max-width: 575px) {
            .category-main { padding: 32px 0 48px; }
            .container { padding-left: 16px; padding-right: 16px; }
            .guide-card { border-radius: 12px; }
            .step-icon { width: 42px; height: 42px; font-size: 14px; }
            .contact-tel { font-size: 18px; }
            .category-cta { padding: 48px 0; }
            .category-cta h2 { font-size: 26px; }
            .footer-top { padding-top: 40px; }
        }

/* roulang page: category2 */
:root {
            --primary: #1D4E9F;
            --primary-dark: #143A78;
            --primary-50: #EAF0F9;
            --accent: #C9A96A;
            --accent-hover: #B08D4F;
            --bg-page: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-deep: #101D33;
            --text-main: #1F2937;
            --text-muted: #66788F;
            --border: #DFE5EF;
            --radius-card: 14px;
            --radius-btn: 6px;
            --radius-img: 10px;
            --shadow-card: 0 6px 24px rgba(16, 29, 51, .07);
            --shadow-hover: 0 12px 40px rgba(16, 29, 51, .13);
            --container-w: 1280px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
            background: var(--bg-page);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .22s ease;
        }

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

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

        :focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25) !important;
        }

        .container {
            max-width: var(--container-w);
        }

        .section-space {
            padding: 96px 0;
        }

        h1,
        h2,
        h3,
        h4 {
            line-height: 1.35;
            color: var(--text-main);
            font-weight: 700;
        }

        /* ===== Bootstrap 默认类覆盖 ===== */
        .btn {
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-weight: 500;
            border: none;
            transition: all .25s ease;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 14px rgba(29, 78, 159, .3);
        }

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

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

        .navbar {
            background: #fff;
        }

        .nav-link {
            color: var(--text-main);
            font-weight: 500;
        }

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

        .navbar-toggler {
            border: none;
            padding: 0;
            background: transparent;
        }

        .card {
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        .accordion-button {
            border-radius: var(--radius-card) !important;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            background: var(--bg-card);
            border: 1px solid var(--border);
            box-shadow: none;
            transition: all .25s ease;
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-50);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25) !important;
        }

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }

        .accordion-button::after {
            background-size: 16px;
            transition: transform .25s;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }

        .accordion-body {
            padding: 4px 24px 20px;
            color: var(--text-muted);
            border-left: 3px solid var(--accent);
            margin: 0 16px 0 24px;
            border-radius: 0 0 4px 4px;
        }

        .form-control {
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text-main);
            background: #fff;
            transition: border-color .2s, box-shadow .2s;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25) !important;
        }

        .form-select {
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 12px 16px;
        }

        .badge {
            border-radius: 4px;
            padding: 5px 12px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-50);
            color: var(--primary);
        }

        .breadcrumb {
            background: transparent;
            margin: 0;
            padding: 0;
        }

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

        .breadcrumb-item+.breadcrumb-item::before {
            color: var(--text-muted);
        }

        .list-group {
            border-radius: var(--radius-card);
        }

        .list-group-item {
            border-color: var(--border);
            color: var(--text-main);
        }

        /* ===== 导航 ===== */
        .main-nav {
            background: #fff;
            box-shadow: 0 6px 24px rgba(16, 29, 51, .06);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

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

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .brand:hover {
            color: var(--primary-dark);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0;
            flex-shrink: 0;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 36px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu a {
            color: var(--text-main);
            font-weight: 500;
            font-size: 15px;
            padding: 6px 2px;
            position: relative;
        }

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

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

        .nav-menu a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            display: flex;
            align-items: center;
        }

        .navbar-toggler {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: trasparent;
            position: relative;
        }

        .navbar-toggler span {
            position: absolute;
            left: 10px;
            right: 10px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all .25s;
        }

        .navbar-toggler span:nth-child(1) {
            top: 14px;
        }

        .navbar-toggler span:nth-child(2) {
            top: 22px;
            width: 16px;
        }

        .navbar-toggler.active span:nth-child(1) {
            top: 19px;
            transform: rotate(45deg);
        }

        .navbar-toggler.active span:nth-child(2) {
            top: 19px;
            transform: rotate(-45deg);
            width: 20px;
        }

        .btn-accent {
            background: var(--accent);
            color: var(--bg-deep);
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 10px 24px;
            transition: all .25s;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: var(--bg-deep);
            box-shadow: 0 4px 14px rgba(201, 169, 106, .35);
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(to right, rgba(16, 29, 51, .88), rgba(16, 29, 51, .55));
            background-size: cover;
            background-position: center;
            height: 240px;
            display: flex;
            align-items: center;
            color: #fff;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: 4px;
            padding: 4px 14px;
            font-size: 12px;
            letter-spacing: 2px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 12px;
        }

        .category-hero p {
            color: rgba(255, 255, 255, .82);
            font-size: 16px;
            max-width: 640px;
            margin: 0;
        }

        /* ===== 主体两栏 ===== */
        .category-main {
            padding: 80px 0;
        }

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

        .main-head h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .main-head p {
            color: var(--text-muted);
            font-size: 15px;
        }

        .cat-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow .3s ease, border-color .3s;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
        }

        .cat-card .img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--primary-50);
        }

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

        .cat-card:hover .img-wrap img {
            transform: scale(1.03);
        }

        .cat-card .img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(16, 29, 51, .08));
        }

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

        .cat-card-tag {
            display: inline-block;
            background: var(--primary-50);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            border-radius: 4px;
            padding: 3px 10px;
            align-self: flex-start;
            margin-bottom: 14px;
            position: relative;
        }

        .cat-card-tag::before {
            content: '';
            display: inline-block;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            margin-right: 6px;
            vertical-align: 1px;
        }

        .cat-card-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .cat-card-title a {
            color: inherit;
        }

        .cat-card-title a:hover {
            color: var(--primary);
        }

        .cat-card-desc {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.65;
            margin-bottom: 18px;
            flex: 1;
        }

        .cat-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .cat-card-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== 侧栏 ===== */
        .sidebar {
            position: sticky;
            top: 88px;
        }

        .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 26px;
            margin-bottom: 24px;
        }

        .side-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 12px;
        }

        .side-card h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

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

        .side-cat-list li {
            border-bottom: 1px dashed var(--border);
        }

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

        .side-cat-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 500;
            transition: color .2s;
        }

        .side-cat-list a:hover {
            color: var(--primary);
        }

        .side-cat-list a span {
            color: var(--accent);
            font-size: 16px;
            transition: transform .2s;
        }

        .side-cat-list a:hover span {
            transform: translateX(4px);
        }

        .side-cat-list .side-desc {
            display: block;
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 400;
            margin-top: 2px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-block;
            background: var(--bg-page);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 5px 14px;
            font-size: 13px;
            color: var(--text-main);
            transition: all .2s;
        }

        .tag:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .side-contact {
            border: 1px solid var(--accent);
            position: relative;
            background: #fff;
        }

        .side-contact .badge-gold {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            border-radius: 4px;
            padding: 2px 10px;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .side-contact h3 {
            margin-bottom: 10px;
        }

        .side-contact p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 18px;
        }

        .side-contact p span {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== 价值区 ===== */
        .value-section {
            background: #fff;
            border-top: 1px solid var(--border);
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 520px;
            margin: 0 auto;
        }

        .value-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 28px;
            text-align: center;
            height: 100%;
            transition: box-shadow .3s ease;
        }

        .value-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .value-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .value-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

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

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--primary-50);
        }

        .faq-section .container {
            max-width: 900px;
        }

        .faq-section h2 {
            text-align: center;
            font-size: 32px;
            margin-bottom: 40px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 88px 0;
            background: linear-gradient(105deg, rgba(16, 29, 51, .95), rgba(16, 29, 51, .82)), url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            position: relative;
        }

        .cta-inner {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 20px;
        }

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

        .cta-inner>div>div:first-child p {
            color: rgba(255, 255, 255, .82);
            font-size: 15px;
            max-width: 420px;
            margin-bottom: 24px;
        }

        .cta-phone span {
            display: block;
            color: rgba(255, 255, 255, .55);
            font-size: 13px;
            letter-spacing: 1px;
            margin-bottom: 2px;
        }

        .cta-phone strong {
            color: var(--accent);
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 1px;
        }

        .cta-form-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: 0 16px 48px rgba(0, 0, 0, .2);
        }

        .cta-form-card .form-control {
            margin-bottom: 14px;
        }

        .cta-form-card .btn-accent {
            width: 100%;
            margin-top: 4px;
        }

        .form-tip {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 12px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .82);
            border-top: 1px solid rgba(201, 169, 106, .3);
        }

        .footer-top {
            padding: 64px 0 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .brand-icon {
            background: var(--accent);
            color: var(--bg-deep);
        }

        .footer-desc {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            max-width: 240px;
            margin: 0;
        }

        .footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, .82);
            font-size: 14px;
            transition: color .2s;
        }

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

        .footer-contact {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .4);
            transition: color .2s;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1200px) {
            .container {
                max-width: 1200px;
            }
            .category-hero {
                height: 220px;
            }
        }

        @media (max-width: 992px) {
            .section-space {
                padding: 72px 0;
            }
            .navbar-toggler {
                display: block;
            }
            .nav-menu {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 0 24px;
                box-shadow: 0 16px 32px rgba(16, 29, 51, .1);
                max-height: 0;
                overflow: hidden;
                transition: max-height .35s ease, padding .35s ease;
                border-top: 1px solid var(--border);
            }
            .nav-menu.open {
                max-height: 420px;
                padding: 16px 24px 24px;
            }
            .nav-menu li {
                width: 100%;
                border-bottom: 1px solid var(--border);
            }
            .nav-menu li:last-child {
                border-bottom: none;
            }
            .nav-menu a {
                display: block;
                padding: 14px 0;
                font-size: 16px;
            }
            .nav-menu a.active::after {
                bottom: 6px;
                height: 3px;
                width: 32px;
            }
            .nav-cta {
                margin-left: auto;
                margin-right: 12px;
            }
            .category-hero {
                height: 200px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-main {
                padding: 56px 0;
            }
            .sidebar {
                margin-top: 32px;
                position: static;
            }
            .value-card {
                margin-bottom: 16px;
            }
            .cta-inner h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .section-space {
                padding: 56px 0;
            }
            .category-hero {
                height: 180px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .hero-badge {
                font-size: 11px;
                margin-bottom: 10px;
            }
            .main-head h2 {
                font-size: 24px;
            }
            .cat-card-title {
                font-size: 18px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .faq-section h2 {
                font-size: 26px;
            }
            .cta-section {
                padding: 64px 0;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
            .cta-phone strong {
                font-size: 24px;
            }
            .footer-top {
                padding: 48px 0 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom .container {
                justify-content: center;
            }
        }

        @media (max-width: 576px) {
            .category-hero {
                height: 160px;
                background: linear-gradient(rgba(16, 29, 51, .9), rgba(16, 29, 51, .75)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            }
            .category-hero h1 {
                font-size: 22px;
                line-height: 1.3;
            }
            .category-main {
                padding: 40px 0;
            }
            .cat-card-body {
                padding: 18px;
            }
            .cat-card-title {
                font-size: 17px;
            }
            .side-card {
                padding: 20px;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .section-head p {
                font-size: 14px;
            }
            .value-card {
                padding: 28px 20px;
            }
            .faq-section h2 {
                font-size: 24px;
            }
            .accordion-body {
                font-size: 14px;
            }
            .cta-form-card {
                padding: 24px;
            }
            .brand {
                font-size: 17px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 12px;
            }
            .btn-accent {
                padding: 9px 18px;
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1D4E9F;
            --primary-dark: #143A78;
            --primary-50: #EAF0F9;
            --accent: #C9A96A;
            --accent-hover: #B08D4F;
            --bg-page: #F5F7FA;
            --bg-card: #FFFFFF;
            --bg-deep: #101D33;
            --text-main: #1F2937;
            --text-muted: #66788F;
            --border: #DFE5EF;
            --radius-card: 14px;
            --radius-btn: 6px;
            --radius-img: 10px;
            --shadow-card: 0 6px 24px rgba(16, 29, 51, .07);
            --shadow-hover: 0 12px 40px rgba(16, 29, 51, .13);
            --container-w: 1280px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

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

        :focus {
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
            outline: none;
        }

        a:focus-visible,
        button:focus-visible {
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
            outline: none;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container-w);
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

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

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

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 14px rgba(29, 78, 159, .3);
        }

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

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

        .btn-accent {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--bg-deep);
            font-weight: 600;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--bg-deep);
        }

        .btn-ghost {
            border: 1px solid rgba(255, 255, 255, .75);
            background: transparent;
            color: #fff;
        }

        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
        }

        .badge {
            border-radius: 4px;
            padding: 6px 12px;
            font-size: 13px;
            font-weight: 500;
            line-height: 1.4;
            background: var(--primary-50);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb {
            background: none;
            padding: 0;
            margin: 0 0 14px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .7);
            font-size: 14px;
        }

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

        .breadcrumb .current {
            color: rgba(255, 255, 255, .9);
            font-size: 14px;
        }

        .navbar-toggler {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: #fff;
            padding: 0;
            position: relative;
        }

        .navbar-toggler span,
        .navbar-toggler span::before,
        .navbar-toggler span::after {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            content: "";
            position: absolute;
            left: 10px;
            transition: all .3s ease;
        }

        .navbar-toggler span {
            top: 20px;
        }

        .navbar-toggler span::before {
            top: -6px;
        }

        .navbar-toggler span::after {
            top: 6px;
        }

        .navbar-toggler.active span {
            background: transparent;
        }

        .navbar-toggler.active span::before {
            transform: rotate(45deg);
            top: 0;
        }

        .navbar-toggler.active span::after {
            transform: rotate(-45deg);
            top: 0;
        }

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

        .card:hover {
            box-shadow: var(--shadow-hover);
        }

        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(16, 29, 51, .03);
        }

        .accordion-button {
            background: #fff;
            color: var(--text-main);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 20px;
            position: relative;
            border-radius: var(--radius-card) !important;
            transition: background .2s ease;
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-50);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
            z-index: 2;
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%231D4E9F' viewBox='0 0 16 16'%3E%3Cpath d='M8 4a1 1 0 1 0-2 0v2H4a1 1 0 0 0 0 2h2v2a1 1 0 1 0 2 0V8h2a1 1 0 1 0 0-2H8V4z'/%3E%3C/svg%3E");
            transition: transform .25s ease;
        }

        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%231D4E9F' viewBox='0 0 16 16'%3E%3Cpath d='M4 7a1 1 0 0 0 0 2h8a1 1 0 1 0 0-2H4z'/%3E%3C/svg%3E");
            transform: rotate(0);
        }

        .accordion-body {
            padding: 0 20px 18px;
            font-size: 15px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            margin-top: -1px;
            padding-top: 14px;
        }

        .form-control,
        .form-select {
            border-radius: 8px;
            border-color: var(--border);
            padding: 10px 14px;
            font-size: 15px;
            color: var(--text-main);
        }

        .form-control:focus,
        .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 78, 159, .25);
        }

        .list-group {
            border-radius: var(--radius-card);
        }

        .list-group-item {
            border-color: var(--border);
            background: #fff;
            color: var(--text-main);
            font-size: 15px;
            padding: 14px 18px;
        }

        .text-muted {
            color: var(--text-muted) !important;
        }

        /* ===== 导航 ===== */
        .main-nav {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            box-shadow: var(--shadow-card);
        }

        .main-nav .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 72px;
            position: relative;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.2px;
            white-space: nowrap;
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .5px;
            flex-shrink: 0;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 30px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-menu li {
            margin: 0;
        }

        .nav-menu a {
            display: block;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            padding: 10px 2px;
            position: relative;
            line-height: 1.4;
            transition: color .2s ease;
        }

        .nav-menu a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .25s ease;
        }

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

        .nav-menu a:hover::after {
            transform: scaleX(1);
        }

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

        .nav-menu a.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            margin-left: auto;
        }

        .nav-cta .btn {
            padding: 10px 22px;
            font-size: 14px;
            border-radius: var(--radius-btn);
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            position: relative;
            background-image: url("/assets/images/backpic/back-1.png");
            background-size: cover;
            background-position: center;
            min-height: 240px;
            display: flex;
            align-items: center;
            padding: 48px 0;
        }

        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(16, 29, 51, .9) 0%, rgba(16, 29, 51, .6) 70%, rgba(16, 29, 51, .35) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero h1 {
            color: #fff;
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin: 0 0 14px;
            max-width: 860px;
        }

        .category-hero .category-desc {
            color: rgba(255, 255, 255, .82);
            font-size: 16px;
            max-width: 720px;
            margin: 0;
            line-height: 1.7;
        }

        /* ===== 统计条 ===== */
        .hero-stat {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }

        .hero-stat .stat-box {
            padding: 24px 16px;
            text-align: center;
            position: relative;
        }

        .hero-stat .stat-box+.stat-box {
            border-left: 1px solid var(--border);
        }

        .hero-stat .stat-num {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            letter-spacing: -0.02em;
        }

        .hero-stat .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 分类主区 ===== */
        .category-main {
            padding: 72px 0;
        }

        .section-head {
            margin-bottom: 28px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 16px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: -0.01em;
            color: var(--text-main);
            margin: 0;
        }

        .update-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-50);
            color: var(--primary);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
        }

        .update-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #18a058;
            display: inline-block;
            animation: pulse-dot 2s ease infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: .45;
            }
        }

        .topic-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            transition: box-shadow .25s ease;
            display: flex;
            flex-direction: column;
        }

        .topic-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .topic-card .card-img-wrap {
            display: block;
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

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

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

        .topic-card .topic-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, .92);
            color: var(--primary);
            border-radius: 6px;
            padding: 5px 12px;
            font-size: 13px;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(16, 29, 51, .12);
            backdrop-filter: blur(4px);
        }

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

        .topic-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            margin: 0 0 8px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .topic-card .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0 0 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .topic-card .card-meta {
            margin-top: auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

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

        /* ===== 侧栏 ===== */
        .category-sidebar .side-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            margin-bottom: 24px;
        }

        .category-sidebar .side-card:last-child {
            margin-bottom: 0;
        }

        .category-sidebar .side-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 18px;
            padding-left: 12px;
            border-left: 3px solid var(--accent);
            line-height: 1.4;
        }

        .side-links li {
            border-bottom: 1px dashed var(--border);
        }

        .side-links li:last-child {
            border-bottom: none;
        }

        .side-links a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            font-size: 15px;
            color: var(--text-main);
            transition: color .2s ease;
        }

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

        .side-links a.current {
            color: var(--primary);
            font-weight: 600;
        }

        .side-links .arrow {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform .2s ease, color .2s ease;
        }

        .side-links a:hover .arrow {
            transform: translateX(4px);
            color: var(--primary);
        }

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

        .side-tags .tag-pill {
            background: var(--primary-50);
            color: var(--primary);
            border-radius: 20px;
            padding: 7px 14px;
            font-size: 13px;
            font-weight: 500;
            transition: all .2s ease;
        }

        .side-tags .tag-pill:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }

        .contact-card {
            border: 1px solid var(--accent) !important;
            position: relative;
            overflow: hidden;
        }

        .contact-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
        }

        .contact-card .contact-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
        }

        .contact-card .btn {
            width: 100%;
        }

        /* ===== FAQ ===== */
        .category-faq {
            background: var(--primary-50);
            padding: 72px 0;
        }

        .category-faq .faq-wrap {
            max-width: 840px;
        }

        .category-faq .faq-wrap>h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 28px;
            letter-spacing: -0.01em;
        }

        /* ===== CTA 区 ===== */
        .page-cta {
            background: var(--bg-deep);
            background-image: linear-gradient(120deg, rgba(16, 29, 51, .96), rgba(16, 29, 51, .82));
            background-size: cover;
            padding: 60px 0;
        }

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

        .page-cta h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin: 0 0 10px;
        }

        .page-cta p {
            color: rgba(255, 255, 255, .65);
            font-size: 15px;
            margin: 0;
            max-width: 520px;
        }

        .page-cta .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .82);
            border-top: 1px solid rgba(201, 169, 106, .35);
        }

        .footer-top {
            padding: 56px 0 32px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .brand-icon {
            background: var(--accent);
            color: var(--bg-deep);
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            margin: 0;
        }

        .footer h4 {
            font-size: 16px;
            color: #fff;
            font-weight: 600;
            margin: 0 0 16px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            transition: color .2s ease;
        }

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

        .footer-contact li {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            line-height: 1.7;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .5);
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1199px) {
            .category-hero {
                min-height: 220px;
            }

            .category-hero h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 991px) {
            .navbar-toggler {
                display: block;
            }

            .main-nav .nav-wrap {
                flex-wrap: wrap;
                padding: 12px 0;
                height: auto;
            }

            .nav-menu {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 24px 20px;
                box-shadow: var(--shadow-card);
                border-radius: 0 0 var(--radius-card) var(--radius-card);
                display: none;
                z-index: 999;
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-menu li {
                border-bottom: 1px solid var(--border);
            }

            .nav-menu li:last-child {
                border-bottom: none;
            }

            .nav-menu a {
                padding: 14px 4px;
                font-size: 16px;
            }

            .nav-menu a::after {
                bottom: 6px;
            }

            .nav-cta {
                margin-left: auto;
                margin-right: 0;
            }

            .nav-cta .btn {
                padding: 9px 16px;
                font-size: 13px;
            }

            .category-main {
                padding: 56px 0;
            }

            .category-sidebar {
                margin-top: 36px;
            }

            .category-faq {
                padding: 56px 0;
            }
        }

        @media (max-width: 767px) {
            .category-hero {
                min-height: auto;
                padding: 40px 0;
            }

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

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

            .hero-stat .stat-num {
                font-size: 24px;
            }

            .hero-stat .stat-label {
                font-size: 13px;
            }

            .section-head {
                align-items: flex-start;
                flex-direction: column;
                gap: 10px;
            }

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

            .page-cta {
                padding: 48px 0;
            }

            .page-cta .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }

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

            .page-cta .cta-actions .btn {
                width: 100%;
            }

            .footer-top {
                padding: 40px 0 24px;
            }
        }

        @media (max-width: 575px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .brand {
                font-size: 17px;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 12px;
            }

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

            .hero-stat .stat-box {
                padding: 16px 8px;
            }

            .hero-stat .stat-num {
                font-size: 20px;
            }

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

            .topic-card .card-body h3 {
                font-size: 16px;
            }

            .category-main {
                padding: 40px 0;
            }

            .category-faq {
                padding: 40px 0;
            }

            .accordion-button {
                font-size: 15px;
                padding: 16px 14px;
            }

            .accordion-body {
                font-size: 14px;
                padding: 0 14px 16px;
            }

            .category-sidebar .side-card {
                padding: 20px;
            }

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