/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            --brand: #2B7A9C;
            --brand-light: #3E8FB5;
            --brand-soft: #E8F1F7;
            --accent: #F4794F;
            --accent-hover: #E05B35;
            --accent-soft: #FFF0EB;
            --dark: #1E3A5F;
            --bg: #F7F9FC;
            --white: #FFFFFF;
            --text: #2B3440;
            --muted: #6B7A8E;
            --border: #E5EAF0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
            --shadow-hover: 0 10px 30px rgba(30, 58, 95, 0.14);
            --transition: 0.25s ease;
            --sidebar-w: 240px;
        }

        /* ============ 基础 Reset ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 15px;
            line-height: 1.75;
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        button {
            border: none;
            background: none;
            font-family: inherit;
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        :focus-visible {
            outline: 2px solid var(--brand-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ============ 容器 ============ */
        .container-leyu {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ============ 左侧导航 ============ */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: var(--sidebar-w);
            background: var(--dark);
            z-index: 1050;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
        }
        .brand-block {
            padding: 32px 22px 22px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .brand-text small {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 1px;
            margin-top: 2px;
        }
        .side-nav {
            flex: 1;
            padding: 18px 0;
            overflow-y: auto;
        }
        .side-nav-title {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.4);
            text-transform: uppercase;
            letter-spacing: 2px;
            padding: 12px 26px 6px;
            font-weight: 600;
        }
        .side-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 26px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: all var(--transition);
            position: relative;
        }
        .side-link i {
            width: 18px;
            text-align: center;
            font-size: 15px;
            opacity: 0.8;
        }
        .side-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
            border-left-color: rgba(255, 255, 255, 0.3);
        }
        .side-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .side-link.active i {
            color: var(--accent);
        }
        .side-foot {
            padding: 20px 26px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .side-foot p {
            color: rgba(255, 255, 255, 0.45);
            font-size: 12px;
            line-height: 1.6;
        }
        .side-foot p:first-child {
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            margin-bottom: 4px;
        }
        .side-foot .domain-line {
            font-size: 11px;
            opacity: 0.6;
            font-family: Inter, monospace;
        }

        /* ============ 主内容区 ============ */
        .main-wrap {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        main {
            flex: 1;
        }

        /* ============ 移动端顶栏 ============ */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1060;
            background: var(--dark);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-brand {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-brand i {
            color: var(--accent);
            font-size: 20px;
        }
        .menu-toggle {
            color: #fff;
            font-size: 20px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--dark);
            z-index: 1055;
            padding: 20px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mm-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 12px;
        }
        .mm-top .brand-text {
            font-size: 17px;
        }
        .mm-close {
            color: #fff;
            font-size: 22px;
            width: 38px;
            height: 38px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .mm-close:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .mm-link {
            color: rgba(255, 255, 255, 0.75);
            padding: 13px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: all 0.2s;
        }
        .mm-link i {
            width: 20px;
            text-align: center;
        }
        .mm-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.07);
        }
        .mm-link.active {
            color: var(--accent);
            background: rgba(244, 121, 79, 0.15);
        }

        /* ============ Hero 首屏 ============ */
        .hero {
            background: linear-gradient(135deg, #F0F6FA 0%, #E6F0F6 100%);
            padding: 72px 0 56px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: rgba(59, 130, 162, 0.06);
            pointer-events: none;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 12px;
            font-weight: 600;
            color: var(--brand);
            box-shadow: var(--shadow);
            margin-bottom: 20px;
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .hero h1 .highlight {
            color: var(--brand);
        }
        .hero-sub {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.8;
            max-width: 460px;
            margin-bottom: 28px;
        }
        .hero-btns {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn-leyu-primary {
            background: var(--accent);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 2px solid transparent;
        }
        .btn-leyu-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 6px 20px rgba(229, 91, 53, 0.25);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-leyu-primary:active {
            transform: translateY(0);
        }
        .btn-leyu-outline {
            background: transparent;
            color: var(--brand);
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: 1.5px solid var(--brand);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-leyu-outline:hover {
            background: rgba(43, 122, 156, 0.08);
            color: var(--brand);
            transform: translateY(-1px);
        }
        .btn-leyu-outline:active {
            transform: translateY(0);
        }
        .hero-img-wrap {
            position: relative;
        }
        .hero-img-wrap .hero-img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-hover);
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .hero-img-wrap::after {
            content: "";
            position: absolute;
            left: -16px;
            bottom: -16px;
            width: 100%;
            height: 100%;
            border: 3px solid var(--brand-soft);
            border-radius: var(--radius);
            z-index: -1;
        }
        .hero-float-card {
            position: absolute;
            bottom: -18px;
            left: -20px;
            background: var(--white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 12px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid var(--border);
        }
        .hero-float-card i {
            color: var(--accent);
            font-size: 18px;
        }
        .hero-float-card .pulse-dot {
            width: 8px;
            height: 8px;
            background: #4CAF50;
            border-radius: 50%;
            display: inline-block;
            margin-right: 2px;
            animation: pulse 1.5s infinite;
        }
        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.2); }
        }
        .hero-points {
            display: flex;
            gap: 20px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .hero-points .point {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
        }
        .hero-points .point i {
            color: var(--brand);
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: 64px 0;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            background: var(--brand-soft);
            color: var(--brand);
            border-radius: 999px;
            padding: 5px 14px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 8px;
        }
        .section-header .sub-text {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.6;
            max-width: 600px;
        }

        /* ============ 品牌故事 ============ */
        .story-section {
            background: var(--white);
            border-bottom: 1px solid var(--border);
        }
        .story-text p {
            color: var(--text);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 18px;
        }
        .story-text p:last-child {
            margin-bottom: 0;
        }
        .story-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 16px;
        }
        .metric-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 12px;
            text-align: center;
            transition: all var(--transition);
        }
        .metric-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .metric-card .num {
            font-size: 32px;
            font-weight: 700;
            color: var(--brand);
            line-height: 1.2;
            font-family: Inter, sans-serif;
        }
        .metric-card .label {
            font-size: 13px;
            color: var(--muted);
            margin-top: 4px;
        }
        .story-img {
            width: 100%;
            height: 240px;
            object-fit: cover;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        /* ============ 热门分类 ============ */
        .cat-card {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .cat-card-img {
            height: 160px;
            overflow: hidden;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .cat-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        .cat-card:hover .cat-card-img img {
            transform: scale(1.03);
        }
        .cat-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cat-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cat-card-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 14px;
        }
        .cat-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            transition: all 0.2s;
        }
        .cat-card-link:hover {
            color: var(--accent);
            gap: 10px;
        }

        /* ============ 最新资讯 CMS ============ */
        .news-section {
            background: var(--bg);
            border-bottom: 1px solid var(--border);
        }
        .news-card {
            background: var(--white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .news-card-img {
            height: 170px;
            overflow: hidden;
            border-radius: var(--radius) var(--radius) 0 0;
            position: relative;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.04);
        }
        .news-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
        }
        .news-card-body {
            padding: 18px 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .news-card-body h3 a {
            color: var(--text);
            transition: color 0.2s;
        }
        .news-card-body h3 a:hover {
            color: var(--brand);
        }
        .news-card-body p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
            margin-bottom: 14px;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }
        .news-card-meta .date {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .news-card-meta .read-more {
            color: var(--brand);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }
        .news-card-meta .read-more:hover {
            gap: 8px;
            color: var(--accent);
        }
        .empty-state {
            background: var(--white);
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            padding: 60px 20px;
            text-align: center;
            color: var(--muted);
            grid-column: 1 / -1;
        }
        .empty-state i {
            font-size: 40px;
            color: #C4CED6;
            display: block;
            margin-bottom: 12px;
        }
        .empty-state p {
            font-size: 14px;
        }

        /* ============ 信任背书 ============ */
        .trust-section {
            background: var(--dark);
            padding: 64px 0;
            color: #fff;
        }
        .trust-section .section-tag {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .trust-section .section-header h2 {
            color: #fff;
        }
        .trust-section .sub-text {
            color: rgba(255, 255, 255, 0.6);
        }
        .trust-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 12px;
        }
        .trust-stat {
            text-align: center;
            padding: 20px 8px;
        }
        .trust-stat .num {
            font-size: 38px;
            font-weight: 700;
            font-family: Inter, sans-serif;
            color: var(--accent);
            line-height: 1.3;
        }
        .trust-stat .num small {
            font-size: 22px;
            margin-left: 2px;
        }
        .trust-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
        }
        .trust-brands {
            margin-top: 40px;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 30px;
        }
        .trust-brands p {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            margin-bottom: 16px;
            letter-spacing: 2px;
        }
        .trust-brands .brand-row {
            display: flex;
            justify-content: center;
            gap: 32px;
            flex-wrap: wrap;
            font-size: 16px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.5);
        }
        .trust-brands .brand-row span {
            padding: 6px 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 999px;
        }

        /* ============ FAQ ============ */
        .faq-section {
            background: var(--white);
            border-bottom: 1px solid var(--border);
        }
        .accordion-custom {
            --bs-accordion-bg: var(--white);
            --bs-accordion-border-color: var(--border);
            --bs-accordion-border-radius: var(--radius);
            --bs-accordion-btn-bg: var(--white);
            --bs-accordion-btn-color: var(--text);
            --bs-accordion-active-bg: var(--bg);
            --bs-accordion-active-color: var(--brand);
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-btn-padding-x: 20px;
            --bs-accordion-btn-padding-y: 16px;
            --bs-accordion-body-padding-y: 16px;
            --bs-accordion-body-padding-x: 20px;
        }
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(30, 58, 95, 0.03);
        }
        .accordion-custom .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            background: var(--white);
            transition: all 0.2s;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--bg);
            color: var(--brand);
        }
        .accordion-custom .accordion-button::after {
            background-size: 14px;
            transition: transform 0.3s ease;
        }
        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }
        .accordion-custom .accordion-body {
            background: var(--bg);
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
            padding: 16px 20px;
            border-top: 1px solid var(--border);
        }

        /* ============ CTA 订阅 ============ */
        .cta-section {
            padding: 56px 0;
        }
        .cta-card {
            background: rgba(43, 122, 156, 0.08);
            border: 1px solid rgba(43, 122, 156, 0.15);
            border-radius: var(--radius);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cta-card p {
            color: var(--muted);
            font-size: 14px;
            max-width: 420px;
        }
        .cta-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            max-width: 460px;
            width: 100%;
        }
        .cta-form .form-control {
            height: 42px;
            border-radius: var(--radius-sm);
            border: 1px solid #D7DEE8;
            font-size: 14px;
            padding: 0 14px;
            flex: 1;
            min-width: 200px;
            background: var(--white);
            color: var(--text);
            transition: all 0.2s;
        }
        .cta-form .form-control:focus {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(43, 122, 156, 0.15);
            outline: none;
        }
        .cta-form .form-control::placeholder {
            color: #94A3B3;
        }
        .btn-subscribe {
            height: 42px;
            padding: 0 22px;
            border-radius: var(--radius-sm);
            background: var(--brand);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
            border: none;
        }
        .btn-subscribe:hover {
            background: var(--brand-light);
            box-shadow: 0 4px 14px rgba(43, 122, 156, 0.3);
            transform: translateY(-1px);
        }
        .btn-subscribe:active {
            transform: translateY(0);
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.65);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-text {
            color: #fff;
            font-size: 19px;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 16px;
            max-width: 260px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 10px;
            align-items: flex-start;
        }
        .footer-contact i {
            color: var(--accent);
            width: 16px;
            text-align: center;
            margin-top: 2px;
        }
        .footer-bottom {
            padding: 18px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom .domain {
            font-family: Inter, monospace;
            opacity: 0.7;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1199.98px) {
            :root {
                --sidebar-w: 220px;
            }
            .hero h1 {
                font-size: 30px;
            }
        }
        @media (max-width: 991.98px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-wrap {
                margin-left: 0;
            }
            .mobile-topbar {
                display: flex;
            }
            .mobile-menu {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--dark);
                z-index: 1100;
                padding: 20px;
                flex-direction: column;
                gap: 4px;
            }
            .mobile-menu.open {
                display: flex;
            }
            .hero {
                padding: 48px 0 40px;
            }
            .hero-img-wrap {
                margin-top: 36px;
            }
            .hero-img-wrap .hero-img {
                height: 260px;
            }
            .section {
                padding: 48px 0;
            }
            .trust-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-card {
                padding: 32px 24px;
            }
        }
        @media (max-width: 767.98px) {
            .section-header h2 {
                font-size: 22px;
            }
            .story-metrics {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
            .metric-card .num {
                font-size: 26px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-btns .btn-leyu-primary,
            .hero-btns .btn-leyu-outline {
                padding: 10px 20px;
                font-size: 14px;
            }
            .trust-stat .num {
                font-size: 30px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .form-control {
                width: 100%;
                min-width: 0;
            }
            .btn-subscribe {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 575.98px) {
            .container-leyu {
                padding: 0 16px;
            }
            .hero {
                padding: 36px 0 32px;
            }
            .hero-img-wrap .hero-img {
                height: 200px;
            }
            .hero-float-card {
                bottom: -12px;
                left: -8px;
                padding: 10px 12px;
                font-size: 12px;
            }
            .hero-points {
                gap: 12px;
            }
            .story-metrics {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .story-metrics .metric-card:nth-child(3) {
                grid-column: span 2;
            }
            .trust-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .trust-brand-row {
                gap: 16px;
            }
            .section {
                padding: 40px 0;
            }
            .cta-card {
                padding: 24px 16px;
                text-align: center;
                justify-content: center;
            }
            .cta-card h2 {
                font-size: 22px;
            }
        }

/* roulang page: article */
:root{
  --primary:#2B7A9C;
  --primary-light:#3E8FB5;
  --primary-10:rgba(43,122,156,.10);
  --accent:#F4794F;
  --accent-hover:#E05B35;
  --accent-10:rgba(244,121,79,.10);
  --dark:#1E3A5F;
  --bg:#F7F9FC;
  --card-bg:#FFFFFF;
  --text:#2B3440;
  --text-weak:#6B7A8E;
  --border:#E5EAF0;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 4px 20px rgba(30,58,95,.08);
  --shadow-hover:0 10px 30px rgba(30,58,95,.14);
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC","Inter",sans-serif;
  --font-num:"Inter","Helvetica Neue",sans-serif;
}
*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:var(--font-main);
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{
  text-decoration:none;
  color:inherit;
  transition:color .25s ease;
}
img{
  max-width:100%;
  display:block;
}
button,input,select,textarea{
  font-family:inherit;
}
ul,ol{
  list-style:none;
}
.container-leyu{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  border-radius:var(--radius-sm);
  font-size:14px;
  font-weight:600;
  padding:10px 22px;
  border:1px solid transparent;
  transition:all .25s ease;
  cursor:pointer;
  line-height:1.5;
}
.btn-primary{
  background:var(--accent);
  color:#fff !important;
  border-color:var(--accent);
}
.btn-primary:hover{
  background:var(--accent-hover);
  border-color:var(--accent-hover);
  box-shadow:0 6px 16px rgba(244,121,79,.25);
  transform:translateY(-1px);
}
.btn-primary:active{
  transform:translateY(1px);
}
.btn-outline-primary{
  background:transparent;
  color:var(--primary) !important;
  border-color:var(--primary);
}
.btn-outline-primary:hover{
  background:var(--primary-10);
  border-color:var(--primary);
  color:var(--primary) !important;
}
.btn-outline-primary:active{
  transform:translateY(1px);
}
.tag-badge{
  display:inline-flex;
  align-items:center;
  background:var(--primary-10);
  color:var(--primary);
  font-size:12px;
  font-weight:500;
  border-radius:999px;
  padding:4px 14px;
}

/* 布局 */
.site-wrapper{
  display:flex;
  min-height:100vh;
}
.side-bar{
  width:240px;
  background:var(--dark);
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  z-index:1030;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  overflow-x:hidden;
}
.main-area{
  flex:1;
  margin-left:240px;
  display:flex;
  flex-direction:column;
  min-height:100vh;
}

/* 侧栏品牌区 */
.side-brand{
  padding:28px 24px 20px;
  display:flex;
  align-items:center;
  gap:12px;
  border-bottom:1px solid rgba(255,255,255,.08);
  margin-bottom:18px;
}
.brand-icon{
  width:42px;
  height:42px;
  background:var(--accent);
  border-radius:10px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:19px;
  flex-shrink:0;
  box-shadow:0 4px 10px rgba(244,121,79,.3);
}
.brand-text{
  color:#fff;
  font-size:20px;
  font-weight:700;
  letter-spacing:.5px;
  line-height:1.2;
}
.brand-sub{
  color:rgba(255,255,255,.5);
  font-size:11px;
  letter-spacing:2px;
  margin-top:2px;
}

/* 侧栏导航 */
.side-nav-title{
  color:rgba(255,255,255,.4);
  font-size:12px;
  padding:0 24px 8px;
  letter-spacing:2px;
  text-transform:uppercase;
}
.side-nav{
  display:flex;
  flex-direction:column;
}
.side-link{
  color:rgba(255,255,255,.75);
  padding:12px 24px;
  font-size:14px;
  display:flex;
  align-items:center;
  gap:12px;
  border-left:3px solid transparent;
  transition:all .25s ease;
  line-height:1.5;
}
.side-link i{
  width:18px;
  text-align:center;
  color:rgba(255,255,255,.55);
  font-size:15px;
}
.side-link:hover{
  background:rgba(255,255,255,.06);
  color:#fff;
  border-left-color:rgba(255,255,255,.3);
}
.side-link.active{
  color:#fff;
  background:rgba(255,255,255,.08);
  border-left-color:var(--accent);
}
.side-link.active i{
  color:var(--accent);
}

/* 侧栏底部 */
.side-footer{
  margin-top:auto;
  padding:20px 24px;
  border-top:1px solid rgba(255,255,255,.08);
  color:rgba(255,255,255,.5);
  font-size:13px;
  line-height:2;
}
.side-footer i{
  width:18px;
  color:rgba(255,255,255,.35);
  margin-right:4px;
}
.side-footer .domain{
  color:rgba(255,255,255,.7);
}
.side-copyright{
  margin-top:8px;
  font-size:12px;
  color:rgba(255,255,255,.4);
}

/* 移动端导航 */
.mobile-header,
.mobile-dropdown{
  display:none;
}

/* 文章页主区域 */
.article-page{
  flex:1;
  padding:40px 0 60px;
}
.breadcrumb-nav{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-weak);
  margin-bottom:20px;
  flex-wrap:wrap;
}
.breadcrumb-nav a{
  color:var(--primary);
}
.breadcrumb-nav a:hover{
  color:var(--accent);
}
.breadcrumb-nav i{
  font-size:10px;
  color:#C0CAD6;
}
.breadcrumb-nav .current{
  color:var(--text);
  font-weight:500;
  max-width:320px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

/* 文章卡片 */
.article-card{
  background:#fff;
  border-radius:16px;
  box-shadow:var(--shadow);
  overflow:hidden;
  padding:44px 48px 40px;
}
.article-header{
  max-width:800px;
  margin:0 auto 34px;
  text-align:center;
  padding-bottom:28px;
  border-bottom:1px solid var(--border);
}
.article-cat{
  display:inline-flex;
  align-items:center;
  background:var(--accent-10);
  color:var(--accent);
  font-size:12px;
  font-weight:600;
  border-radius:999px;
  padding:5px 16px;
  margin-bottom:16px;
  letter-spacing:.5px;
}
.article-title{
  font-size:32px;
  font-weight:700;
  color:var(--dark);
  line-height:1.35;
  margin-bottom:18px;
}
.article-meta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:24px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-weak);
}
.meta-item{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.meta-item i{
  color:var(--primary);
}

/* 正文排版 */
.article-body{
  max-width:760px;
  margin:0 auto;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  word-break:break-word;
}
.article-body p{
  margin-bottom:20px;
}
.article-body h2{
  font-size:26px;
  font-weight:700;
  color:var(--dark);
  margin:40px 0 16px;
  padding-left:14px;
  border-left:4px solid var(--accent);
  line-height:1.4;
}
.article-body h3{
  font-size:20px;
  font-weight:600;
  color:var(--dark);
  margin:32px 0 14px;
  line-height:1.5;
}
.article-body h4{
  font-size:17px;
  font-weight:600;
  color:var(--dark);
  margin:24px 0 12px;
}
.article-body img{
  border-radius:12px;
  margin:24px auto;
  box-shadow:var(--shadow);
  max-width:100%;
  height:auto;
}
.article-body blockquote{
  border-left:3px solid var(--accent);
  background:#F8F9FB;
  padding:16px 22px;
  border-radius:0 12px 12px 0;
  margin:24px 0;
  color:var(--text-weak);
  font-style:normal;
}
.article-body blockquote p{
  margin-bottom:8px;
}
.article-body blockquote p:last-child{
  margin-bottom:0;
}
.article-body ul,
.article-body ol{
  padding-left:1.5em;
  margin-bottom:20px;
}
.article-body ul li{
  list-style:disc;
  margin-bottom:8px;
}
.article-body ol li{
  list-style:decimal;
  margin-bottom:8px;
}
.article-body a{
  color:var(--primary);
  text-decoration:underline;
  text-underline-offset:3px;
}
.article-body a:hover{
  color:var(--accent);
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:14px;
}
.article-body th,
.article-body td{
  border:1px solid var(--border);
  padding:12px 14px;
  text-align:left;
}
.article-body th{
  background:var(--bg);
  color:var(--dark);
  font-weight:600;
}
.article-body hr{
  border:none;
  border-top:1px solid var(--border);
  margin:32px 0;
}
.article-body code{
  background:#F1F3F6;
  border-radius:6px;
  padding:2px 8px;
  font-size:14px;
  color:var(--dark);
}

/* 文章标签 */
.article-tags{
  max-width:760px;
  margin:36px auto 0;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  border-top:1px solid var(--border);
  padding-top:24px;
}
.tag-item{
  display:inline-flex;
  align-items:center;
  background:#F1F4F8;
  color:var(--text-weak);
  font-size:12px;
  border-radius:999px;
  padding:5px 14px;
  transition:all .25s ease;
  cursor:default;
}
.tag-item:hover{
  background:var(--primary-10);
  color:var(--primary);
}

/* 上一篇 / 下一篇 */
.article-pager{
  max-width:760px;
  margin:36px auto 0;
  display:flex;
  align-items:stretch;
  gap:16px;
  border-top:1px solid var(--border);
  padding-top:32px;
}
.pager-item{
  flex:1;
  display:block;
  background:var(--bg);
  border-radius:var(--radius);
  padding:16px 20px;
  border:1px solid transparent;
  transition:all .25s ease;
}
.pager-item:hover{
  border-color:var(--primary);
  background:#fff;
  box-shadow:var(--shadow);
  transform:translateY(-2px);
}
.pager-label{
  display:block;
  font-size:12px;
  color:var(--text-weak);
  margin-bottom:6px;
}
.pager-label i{
  font-size:11px;
}
.pager-title{
  display:block;
  font-size:14px;
  font-weight:600;
  color:var(--text);
  line-height:1.5;
}
.pager-item:hover .pager-title{
  color:var(--primary);
}
.pager-btn{
  align-self:center;
  white-space:nowrap;
}

/* 相关阅读 */
.related-section{
  margin-top:48px;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  margin-bottom:24px;
  gap:16px;
  flex-wrap:wrap;
}
.section-label{
  display:block;
  font-size:13px;
  color:var(--primary);
  letter-spacing:1px;
  margin-bottom:4px;
}
.section-title{
  font-size:26px;
  font-weight:700;
  color:var(--dark);
  margin:0;
}
.section-more{
  font-size:14px;
  color:var(--primary);
  font-weight:500;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:all .25s ease;
}
.section-more:hover{
  color:var(--accent);
  gap:10px;
}
.related-card{
  display:block;
  background:#fff;
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:all .25s ease;
  height:100%;
}
.related-card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-3px);
}
.related-img{
  width:100%;
  aspect-ratio:16/10;
  overflow:hidden;
  background:#E9EEF3;
}
.related-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.related-card:hover .related-img img{
  transform:scale(1.03);
}
.related-body{
  padding:20px;
}
.related-body .tag-badge{
  margin-bottom:12px;
}
.related-body h3{
  font-size:17px;
  font-weight:600;
  color:var(--dark);
  line-height:1.5;
  margin-bottom:8px;
  transition:color .25s ease;
}
.related-card:hover .related-body h3{
  color:var(--primary);
}
.related-body p{
  font-size:13px;
  color:var(--text-weak);
  line-height:1.7;
  margin-bottom:14px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.related-date{
  font-size:12px;
  color:#A0AEBD;
  display:flex;
  align-items:center;
  gap:6px;
}
.related-date i{
  font-size:11px;
}

/* 空态 */
.empty-state{
  text-align:center;
  padding:70px 24px;
  max-width:600px;
  margin:0 auto;
}
.empty-icon{
  width:88px;
  height:88px;
  border-radius:50%;
  background:var(--bg);
  margin:0 auto 26px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:34px;
  color:#9FB0C0;
}
.empty-title{
  font-size:26px;
  font-weight:700;
  color:var(--dark);
  margin-bottom:14px;
}
.empty-state p{
  color:var(--text-weak);
  font-size:15px;
  margin-bottom:28px;
}

/* 页脚 */
.site-footer{
  background:var(--dark);
  color:rgba(255,255,255,.75);
  padding:48px 0 0;
  margin-top:auto;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand p{
  font-size:13px;
  line-height:1.85;
  color:rgba(255,255,255,.6);
  max-width:330px;
  margin-bottom:0;
}
.footer-title{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:18px;
  position:relative;
  padding-bottom:10px;
}
.footer-title::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:28px;
  height:3px;
  background:var(--accent);
  border-radius:3px;
}
.footer-links li,
.footer-contact li{
  margin-bottom:11px;
  font-size:14px;
}
.footer-links a{
  color:rgba(255,255,255,.6);
  transition:all .25s ease;
  display:inline-flex;
  align-items:center;
}
.footer-links a:hover{
  color:#fff;
  padding-left:4px;
}
.footer-links i{
  font-size:11px;
  margin-right:6px;
  color:var(--accent);
}
.footer-contact li{
  color:rgba(255,255,255,.6);
  display:flex;
  align-items:center;
  gap:8px;
}
.footer-contact i{
  width:18px;
  color:var(--accent);
  font-size:14px;
}
.footer-bottom{
  padding:20px 0;
  text-align:center;
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom .domain{
  color:rgba(255,255,255,.7);
}

/* 响应式 */
@media (max-width: 991.98px){
  .side-bar{
    display:none;
  }
  .main-area{
    margin-left:0;
  }
  .mobile-header{
    display:flex;
    position:sticky;
    top:0;
    z-index:1040;
    background:var(--dark);
    height:60px;
    align-items:center;
    justify-content:space-between;
    padding:0 16px;
    box-shadow:0 2px 10px rgba(30,58,95,.3);
  }
  .mobile-brand{
    display:flex;
    align-items:center;
    gap:10px;
  }
  .mobile-brand .brand-icon{
    width:34px;
    height:34px;
    font-size:15px;
    border-radius:8px;
  }
  .mobile-brand .brand-text{
    font-size:17px;
  }
  .mobile-toggle{
    background:transparent;
    border:1px solid rgba(255,255,255,.25);
    color:#fff;
    width:38px;
    height:38px;
    border-radius:8px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:16px;
    cursor:pointer;
    transition:all .25s ease;
  }
  .mobile-toggle:hover{
    background:rgba(255,255,255,.1);
  }
  .mobile-dropdown{
    flex-direction:column;
    background:var(--dark);
    padding:10px 16px 18px;
    border-top:1px solid rgba(255,255,255,.08);
    display:none;
  }
  .mobile-dropdown.open{
    display:flex;
  }
  .m-link{
    color:rgba(255,255,255,.8);
    font-size:15px;
    padding:14px 8px;
    border-bottom:1px solid rgba(255,255,255,.07);
    display:flex;
    align-items:center;
    gap:12px;
    transition:all .25s ease;
  }
  .m-link:last-child{
    border-bottom:none;
  }
  .m-link i{
    width:20px;
    text-align:center;
    color:rgba(255,255,255,.5);
  }
  .m-link:hover,
  .m-link.active{
    color:#fff;
    padding-left:14px;
  }
  .m-link:hover i,
  .m-link.active i{
    color:var(--accent);
  }
}

@media (max-width: 768px){
  .article-page{
    padding:24px 0 40px;
  }
  .article-card{
    padding:28px 20px 32px;
    border-radius:12px;
  }
  .article-title{
    font-size:24px;
  }
  .article-meta{
    gap:14px;
    font-size:12px;
  }
  .article-body{
    font-size:15px;
    line-height:1.8;
  }
  .article-body h2{
    font-size:21px;
    margin-top:28px;
  }
  .article-body h3{
    font-size:18px;
  }
  .article-pager{
    flex-direction:column;
    gap:12px;
  }
  .pager-item{
    width:100%;
  }
  .pager-item.text-end{
    text-align:left !important;
  }
  .pager-btn{
    align-self:flex-start;
  }
  .related-section{
    margin-top:36px;
  }
  .section-title{
    font-size:22px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .footer-bottom{
    font-size:12px;
  }
  .breadcrumb-nav .current{
    max-width:180px;
  }
}

@media (max-width: 520px){
  .container-leyu{
    padding-left:16px;
    padding-right:16px;
  }
  .article-card{
    padding:22px 16px;
  }
  .article-title{
    font-size:21px;
  }
  .article-meta{
    flex-direction:column;
    gap:8px;
  }
  .related-img{
    aspect-ratio:16/9;
  }
}

@media (max-width: 991.98px) and (min-width: 769px){
  .mobile-dropdown{
    padding-left:24px;
    padding-right:24px;
  }
}

@media (max-width: 360px){
  .breadcrumb-nav{
    font-size:12px;
  }
  .breadcrumb-nav .current{
    max-width:140px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #2B7A9C;
            --primary-light: #3E8FB5;
            --accent: #F4794F;
            --accent-hover: #E05B35;
            --dark: #1E3A5F;
            --bg: #F7F9FC;
            --card: #FFFFFF;
            --text-main: #2B3440;
            --text-muted: #6B7A8E;
            --border: #E5EAF0;
            --input-border: #D7DEE8;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(30, 58, 95, .08);
            --shadow-hover: 0 10px 30px rgba(30, 58, 95, .14);
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --font-num: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 布局 ===== */
        .page-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .side-bar {
            width: 240px;
            background: var(--dark);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1050;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }
        .main-area {
            flex: 1;
            margin-left: 240px;
            display: flex;
            flex-direction: column;
            min-width: 0;
            min-height: 100vh;
        }
        .page-main {
            flex: 1;
        }

        /* ===== 侧栏 ===== */
        .brand-area {
            padding: 30px 22px 18px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: .5px;
        }
        .brand-logo:hover {
            color: #fff;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            box-shadow: 0 6px 16px rgba(244, 121, 79, .35);
            transition: transform .25s;
        }
        .brand-logo:hover .logo-icon {
            transform: rotate(-8deg) scale(1.05);
        }
        .brand-sub {
            display: block;
            color: rgba(255, 255, 255, .45);
            font-size: 12px;
            margin-top: 4px;
            padding-left: 48px;
        }
        .side-nav {
            padding: 18px 14px;
            flex: 1;
        }
        .side-nav-title {
            color: rgba(255, 255, 255, .4);
            font-size: 11px;
            letter-spacing: 2px;
            text-transform: uppercase;
            padding: 0 12px;
            margin-bottom: 10px;
        }
        .side-link {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, .72);
            font-size: 14px;
            font-weight: 500;
            padding: 12px 14px;
            border-radius: 10px;
            margin-bottom: 4px;
            transition: background .25s, color .25s, box-shadow .25s;
        }
        .side-link i {
            width: 18px;
            text-align: center;
            font-size: 15px;
            color: rgba(255, 255, 255, .55);
            transition: color .25s;
        }
        .side-link:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
        }
        .side-link:hover i {
            color: var(--accent);
        }
        .side-link.active {
            background: rgba(255, 255, 255, .12);
            color: #fff;
            box-shadow: inset 3px 0 0 var(--accent);
        }
        .side-link.active i {
            color: var(--accent);
        }
        .side-bottom {
            padding: 20px 22px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            color: rgba(255, 255, 255, .42);
            font-size: 12px;
        }
        .side-bottom p {
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .side-bottom i {
            color: var(--accent);
            width: 14px;
            text-align: center;
        }
        .side-bottom .domain {
            color: rgba(255, 255, 255, .65);
            letter-spacing: 1px;
        }

        /* ===== 移动端头部 ===== */
        .mobile-header {
            display: none;
            background: var(--dark);
            position: sticky;
            top: 0;
            z-index: 1040;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            box-shadow: 0 4px 12px rgba(30, 58, 95, .18);
        }
        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }
        .mobile-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 14px;
            border-radius: 8px;
        }
        .mobile-menu-btn {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background .25s;
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, .12);
        }
        .mobile-menu {
            display: none;
            background: var(--dark);
            padding: 8px 16px 18px;
            box-shadow: 0 8px 24px rgba(30, 58, 95, .2);
        }
        .mobile-menu.show {
            display: block;
        }
        .mobile-menu .side-link {
            color: #fff;
        }
        .mobile-menu .side-link.active {
            background: var(--accent);
            color: #fff;
            box-shadow: none;
        }
        .mobile-menu .side-link.active i {
            color: #fff;
        }
        .mobile-menu .side-link:hover {
            background: rgba(255, 255, 255, .1);
        }

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

        /* ===== 按钮 ===== */
        .btn-leyu {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            border: 0;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all .25s ease;
            box-shadow: 0 4px 14px rgba(244, 121, 79, .25);
        }
        .btn-leyu:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(244, 121, 79, .32);
        }
        .btn-leyu:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 11px 26px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all .25s ease;
        }
        .btn-outline:hover {
            background: rgba(43, 122, 156, .08);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: translateY(1px);
        }
        .btn-white-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .65);
            color: #fff;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all .25s;
        }
        .btn-white-outline:hover {
            background: rgba(255, 255, 255, .2);
            color: #fff;
            border-color: #fff;
        }
        .btn-sm {
            padding: 9px 20px;
            font-size: 13px;
            border-radius: 8px;
        }

        /* ===== Hero Banner ===== */
        .page-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 76px 0 68px;
            border-bottom: 1px solid var(--border);
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, .82);
            z-index: 1;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(43, 122, 156, .15);
            z-index: 1;
        }
        .page-hero .container-leyu {
            position: relative;
            z-index: 2;
        }
        .page-hero-inner {
            max-width: 760px;
        }
        .page-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(43, 122, 156, .12);
            border: 1px solid rgba(43, 122, 156, .28);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: 999px;
            margin-bottom: 18px;
        }
        .page-hero h1 {
            font-size: 40px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.25;
            margin: 0 0 14px;
            letter-spacing: 1px;
        }
        .page-hero p {
            font-size: 16px;
            color: var(--text-main);
            max-width: 660px;
            margin-bottom: 30px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== 标签行 ===== */
        .topic-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 36px;
            align-items: center;
        }
        .topic-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            color: var(--text-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 7px 18px;
            transition: all .25s;
            cursor: default;
        }
        .topic-tab i {
            font-size: 12px;
        }
        .topic-tab.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(43, 122, 156, .25);
        }
        .topic-tab:hover:not(.active) {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
        }

        /* ===== 板块 ===== */
        .section-block {
            padding: 60px 0;
        }
        .section-block.pb-0 {
            padding-bottom: 0;
        }
        .section-block.bg-white {
            background: #fff;
        }
        .section-head {
            margin-bottom: 36px;
        }
        .section-label {
            display: inline-block;
            background: #E8F1F7;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.3;
            margin: 0 0 8px;
        }
        .section-sub {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 680px;
        }

        /* ===== 内容行（布局A） ===== */
        .content-row {
            display: flex;
            align-items: center;
            gap: 40px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px;
            margin-bottom: 24px;
            transition: box-shadow .3s, transform .3s;
        }
        .content-row:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .content-row.reverse {
            flex-direction: row-reverse;
        }
        .content-info {
            flex: 1;
            min-width: 0;
        }
        .content-img {
            flex: 1;
            max-width: 46%;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(30, 58, 95, .06);
        }
        .content-img img {
            width: 100%;
            height: 210px;
            object-fit: cover;
            transition: transform .45s ease;
        }
        .content-row:hover .content-img img {
            transform: scale(1.03);
        }
        .content-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 10px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: #FFF0EB;
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 13px;
            border-radius: 999px;
        }
        .meta-date i,
        .meta-read i {
            margin-right: 4px;
            font-size: 12px;
            color: #b0bec9;
        }
        .content-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.4;
            margin: 0 0 10px;
        }
        .content-text {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        /* ===== 统计条 ===== */
        .stats-bar {
            background: var(--dark);
            padding: 48px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-num {
            font-size: 38px;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-num);
            line-height: 1.2;
            letter-spacing: .5px;
        }
        .stat-label {
            color: rgba(255, 255, 255, .6);
            font-size: 13px;
            margin-top: 6px;
            letter-spacing: .5px;
        }

        /* ===== FAQ ===== */
        .accordion-custom {
            max-width: 860px;
        }
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            background: #fff;
            box-shadow: 0 2px 10px rgba(30, 58, 95, .04);
        }
        .accordion-custom .accordion-item:first-of-type,
        .accordion-custom .accordion-item:last-of-type {
            border-radius: var(--radius);
        }
        .accordion-custom .accordion-header {
            margin: 0;
        }
        .accordion-custom .accordion-button {
            padding: 19px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            background: #fff;
            box-shadow: none;
            border-radius: 0;
            transition: color .25s;
        }
        .accordion-custom .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%236B7A8E'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform .3s ease;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: #fff;
            box-shadow: none;
        }
        .accordion-custom .accordion-button:not(.collapsed)::after {
            filter: none;
            transform: rotate(180deg);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(43, 122, 156, .18);
        }
        .accordion-custom .accordion-body {
            background: #F7F9FC;
            padding: 16px 24px 20px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.85;
            border-top: 1px solid var(--border);
        }

        /* ===== 延伸说明 + 返回首页 ===== */
        .extend-text {
            max-width: 760px;
            margin: 0 auto 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.85;
            text-align: center;
        }
        .back-home {
            text-align: center;
            margin-top: 32px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0 72px;
        }
        .cta-card {
            background: rgba(43, 122, 156, .08);
            border: 1px solid rgba(43, 122, 156, .18);
            border-radius: 18px;
            padding: 44px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .cta-card p {
            color: var(--text-muted);
            margin: 0 auto 30px;
            max-width: 620px;
            font-size: 15px;
        }
        .cta-form {
            display: flex;
            max-width: 520px;
            margin: 0 auto;
            gap: 10px;
        }
        .cta-form input {
            flex: 1;
            height: 44px;
            border: 1px solid var(--input-border);
            border-radius: 8px;
            padding: 0 16px;
            font-size: 14px;
            color: var(--text-main);
            background: #fff;
            transition: border-color .25s, box-shadow .25s;
        }
        .cta-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 122, 156, .18);
        }
        .cta-form input::placeholder {
            color: #94A3B3;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .65);
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            padding: 48px 0 32px;
        }
        .brand-text {
            color: #fff;
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            max-width: 340px;
            line-height: 1.8;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links,
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .6);
            transition: color .25s, padding-left .25s;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 3px;
        }
        .footer-links i,
        .footer-contact i {
            font-size: 12px;
            margin-right: 8px;
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 18px 0;
            color: rgba(255, 255, 255, .45);
            font-size: 12px;
            text-align: center;
        }
        .footer-bottom .domain {
            color: rgba(255, 255, 255, .65);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .side-bar {
                display: none;
            }
            .main-area {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .mobile-menu {
                display: none;
            }
            .mobile-menu.show {
                display: block;
            }
            .page-hero {
                padding: 56px 0 48px;
            }
        }

        @media (max-width: 767.98px) {
            .container-leyu {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .hero-actions .btn-leyu,
            .hero-actions .btn-white-outline {
                width: 100%;
            }
            .section-block {
                padding: 44px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .content-row {
                flex-direction: column !important;
                padding: 20px;
                gap: 18px;
            }
            .content-img {
                max-width: 100%;
            }
            .content-img img {
                height: 180px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-top: 38px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-card {
                padding: 30px 20px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .btn-leyu {
                width: 100%;
            }
            .accordion-custom .accordion-button {
                padding: 16px 18px;
            }
            .accordion-custom .accordion-body {
                padding: 14px 18px 18px;
            }
        }

        @media (max-width: 519.98px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 14px;
            }
            .page-hero-tag {
                font-size: 12px;
            }
            .section-title {
                font-size: 22px;
            }
            .content-title {
                font-size: 17px;
            }
            .content-text {
                font-size: 14px;
            }
            .topic-tab {
                padding: 6px 14px;
                font-size: 12px;
            }
            .stat-num {
                font-size: 32px;
            }
            .cta-card h2 {
                font-size: 22px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2B7A9C;
            --primary-light: #3E8FB5;
            --accent: #F4794F;
            --accent-dark: #E05B35;
            --dark: #1E3A5F;
            --body-bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text-main: #2B3440;
            --text-weak: #6B7A8E;
            --border: #E5EAF0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(30,58,95,0.08);
            --shadow-hover: 0 10px 30px rgba(30,58,95,0.14);
            --transition: 0.25s ease;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "PingFang SC", sans-serif;
            --space-lg: 64px;
            --space-md: 32px;
            --radius-sm: 8px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--body-bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 15px;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        button,
        input {
            font-family: inherit;
        }
        .container-leyu {
            max-width: 1200px;
            padding: 0 24px;
            margin: 0 auto;
        }

        /* ===== 左侧竖向导航 ===== */
        .site-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .side-panel {
            width: 240px;
            flex-shrink: 0;
            background: var(--dark);
            color: #fff;
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 1050;
            padding: 24px 0 20px;
            transition: transform 0.3s ease;
        }
        .side-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 22px 24px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            margin-bottom: 16px;
        }
        .side-brand .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }
        .side-brand .brand-text {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .side-nav-title {
            font-size: 12px;
            color: rgba(255,255,255,0.45);
            text-transform: uppercase;
            letter-spacing: 1px;
            padding: 0 22px;
            margin-bottom: 8px;
            font-weight: 500;
        }
        .side-nav {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 2px;
            padding: 0 12px;
        }
        .side-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 14px;
            color: rgba(255,255,255,0.75);
            border-radius: 10px;
            font-size: 14.5px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: background var(--transition), color var(--transition);
        }
        .side-link i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            opacity: 0.85;
        }
        .side-link:hover {
            color: #fff;
            background: rgba(255,255,255,0.08);
            border-left-color: var(--accent);
        }
        .side-link.active {
            color: #fff;
            background: rgba(255,255,255,0.06);
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .side-footer {
            padding: 16px 22px 0;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 12px;
            color: rgba(255,255,255,0.4);
            line-height: 1.6;
        }
        .side-footer .domain {
            color: rgba(255,255,255,0.6);
        }

        /* ===== 主内容区 ===== */
        .main-area {
            flex: 1;
            margin-left: 240px;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }
        main {
            flex: 1;
        }

        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1040;
            background: var(--dark);
            padding: 0 20px;
            height: 60px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-brand {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-brand i {
            color: var(--accent);
            font-size: 16px;
        }
        .mobile-toggle {
            background: transparent;
            border: none;
            color: #fff;
            font-size: 20px;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-nav-menu {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            background: var(--dark);
            z-index: 1030;
            padding: 12px 20px 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        .mobile-nav-menu.open {
            display: block;
        }
        .mobile-nav-menu .side-link {
            padding: 13px 14px;
            font-size: 15px;
        }
        .mobile-nav-menu .side-link.active {
            background: var(--accent);
            border-left-color: transparent;
            color: #fff;
            border-radius: 10px;
        }

        /* ===== 按钮 ===== */
        .btn-le {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1.4;
        }
        .btn-le-primary {
            background: var(--accent);
            color: #fff;
        }
        .btn-le-primary:hover {
            background: var(--accent-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(244,121,79,0.3);
            transform: translateY(-1px);
        }
        .btn-le-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }
        .btn-le-outline:hover {
            background: rgba(43,122,156,0.08);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .btn-le:active {
            transform: translateY(1px);
        }

        /* ===== 标签 ===== */
        .tag-le {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: #E8F1F7;
            color: #1E5E7A;
            border-radius: 999px;
            padding: 4px 13px;
            font-size: 12px;
            font-weight: 500;
        }
        .tag-le-orange {
            background: #FFF0EB;
            color: #D95833;
        }

        /* ===== 分类页 Hero Banner ===== */
        .category-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 88px 0 72px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(43, 122, 156, 0.15);
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(30,58,95,0.55) 0%, rgba(30,58,95,0.15) 60%, transparent 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            padding: 0 24px;
            margin: 0 auto;
            width: 100%;
        }
        .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
            text-shadow: 0 2px 10px rgba(0,0,0,0.15);
        }
        .hero-content p {
            color: rgba(255,255,255,0.92);
            font-size: 15px;
            max-width: 420px;
            line-height: 1.7;
        }

        /* ===== 板块标题 ===== */
        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-head .section-tag {
            display: inline-block;
            background: #E8F1F7;
            color: #1E5E7A;
            border-radius: 999px;
            font-size: 13px;
            padding: 5px 16px;
            margin-bottom: 12px;
            font-weight: 500;
        }
        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-weak);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ===== 交错内容区 ===== */
        .brand-stories {
            padding: var(--space-lg) 0;
        }
        .stories-list {
            display: flex;
            flex-direction: column;
            gap: 42px;
        }
        .story-row {
            display: flex;
            align-items: center;
            gap: 40px;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 30px;
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid var(--border);
        }
        .story-row:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .story-row.reversed {
            flex-direction: row-reverse;
        }
        .story-text {
            flex: 1;
            min-width: 0;
        }
        .story-media {
            flex: 1;
            min-width: 0;
        }
        .story-media img {
            width: 100%;
            height: 240px;
            object-fit: cover;
            border-radius: var(--radius);
        }
        .story-text .tag-le {
            margin-bottom: 14px;
        }
        .story-text h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .story-text p {
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .story-meta {
            display: flex;
            gap: 18px;
            font-size: 13px;
            color: var(--text-weak);
        }
        .story-meta i {
            color: var(--primary);
            margin-right: 4px;
        }

        /* ===== 品牌价值区 ===== */
        .value-section {
            padding: var(--space-lg) 0;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .value-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .value-card {
            background: var(--body-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .value-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .value-card .value-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 20px;
            color: #fff;
        }
        .value-icon.icon-blue {
            background: var(--primary);
        }
        .value-icon.icon-orange {
            background: var(--accent);
        }
        .value-icon.icon-dark {
            background: var(--dark);
        }
        .value-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .value-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--space-lg) 0;
        }
        .faq-section h2 {
            text-align: center;
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 40px;
        }
        .faq-section .accordion {
            max-width: 800px;
            margin: 0 auto;
        }
        .accordion-item {
            border: 1px solid var(--border) !important;
            border-radius: var(--radius) !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: none !important;
        }
        .accordion-button {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            background: #fff;
            padding: 18px 22px;
            line-height: 1.5;
        }
        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: #F0F7FB;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(43,122,156,0.15);
            outline: none;
        }
        .accordion-button::after {
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .accordion-body {
            background: #F7F9FC;
            padding: 18px 22px;
            color: var(--text-weak);
            font-size: 14px;
            line-height: 1.75;
            border-top: 1px solid var(--border);
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            padding: 0 0 var(--space-lg);
        }
        .cta-box {
            background: rgba(43,122,156,0.1);
            border-radius: var(--radius);
            padding: 48px 36px;
            text-align: center;
            border: 1px solid rgba(43,122,156,0.15);
        }
        .cta-box h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .cta-box p {
            font-size: 15px;
            color: var(--text-weak);
            margin-bottom: 24px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 460px;
            margin: 0 auto;
        }
        .cta-form input {
            flex: 1;
            height: 42px;
            border-radius: var(--radius-sm);
            border: 1px solid #D7DEE8;
            padding: 0 16px;
            font-size: 14px;
            background: #fff;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .cta-form input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43,122,156,0.15);
        }
        .cta-form input::placeholder {
            color: #94A3B3;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
        }
        .footer-brand .brand-text {
            color: #fff;
            font-size: 19px;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            line-height: 1.75;
            max-width: 280px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.65);
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-links a i {
            font-size: 10px;
            color: var(--accent);
            opacity: 0.8;
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact li {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact li i {
            color: var(--accent);
            width: 18px;
            text-align: center;
            font-size: 13px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 18px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom .domain {
            color: rgba(255,255,255,0.6);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .side-panel {
                transform: translateX(-100%);
            }
            .side-panel.mobile-open {
                transform: translateX(0);
            }
            .main-area {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .category-hero {
                padding: 64px 0 48px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .story-row,
            .story-row.reversed {
                flex-direction: column;
                gap: 24px;
            }
            .story-media img {
                height: 200px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 767px) {
            .brand-stories {
                padding: 40px 0;
            }
            .value-section {
                padding: 40px 0;
            }
            .faq-section {
                padding: 40px 0;
            }
            .value-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .cta-box {
                padding: 36px 20px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .btn-le {
                width: 100%;
            }
            .category-hero {
                padding: 48px 0 36px;
            }
            .hero-content h1 {
                font-size: 26px;
            }
            .hero-content p {
                font-size: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .story-row {
                padding: 20px;
            }
            .story-media img {
                height: 170px;
            }
        }
        @media (max-width: 520px) {
            .container-leyu {
                padding: 0 16px;
            }
            .category-hero {
                padding: 40px 0 30px;
            }
            .hero-content h1 {
                font-size: 24px;
            }
            .section-head {
                margin-bottom: 30px;
            }
            .cta-box {
                padding: 28px 16px;
            }
            .cta-box h2 {
                font-size: 20px;
            }
            .story-meta {
                flex-wrap: wrap;
                gap: 10px;
            }
            .story-text h3 {
                font-size: 18px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2B7A9C;
            --primary-light: #3E8FB5;
            --accent: #F4794F;
            --accent-hover: #E05B35;
            --deep: #1E3A5F;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text: #2B3440;
            --text-muted: #6B7A8E;
            --border: #E5EAF0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
            --shadow-hover: 0 10px 30px rgba(30, 58, 95, 0.14);
            --transition: 0.25s;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Inter, sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input,
        textarea {
            font-family: inherit;
        }

        .layout-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .main-wrap {
            flex: 1;
            margin-left: 240px;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }
        .container-leyu,
        .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 左侧导航 ===== */
        .side-nav-wrap {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 240px;
            background: var(--deep);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            padding: 24px 0 16px;
        }
        .side-nav-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 24px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            color: #fff;
            flex-shrink: 0;
        }
        .brand-name {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .side-nav {
            flex: 1;
            padding: 20px 0;
            overflow-y: auto;
        }
        .side-nav-title {
            color: rgba(255, 255, 255, 0.45);
            font-size: 12px;
            letter-spacing: 2px;
            padding: 0 24px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .side-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 24px;
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: all 0.25s;
        }
        .side-link i {
            width: 20px;
            text-align: center;
            font-size: 15px;
        }
        .side-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .side-link.active {
            color: #fff;
            border-left-color: var(--accent);
            background: linear-gradient(90deg, rgba(244, 121, 79, 0.15), transparent);
        }
        .side-nav-contact {
            padding: 16px 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.8;
        }
        .side-nav-contact p {
            margin-bottom: 6px;
        }
        .side-nav-contact i {
            margin-right: 6px;
        }

        /* ===== 移动端导航 ===== */
        .mobile-header {
            display: none;
        }
        .mobile-menu {
            display: none;
        }

        @media (max-width: 991.98px) {
            .side-nav-wrap {
                display: none;
            }
            .main-wrap {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                position: sticky;
                top: 0;
                z-index: 1040;
                background: var(--deep);
                padding: 12px 20px;
                box-shadow: 0 4px 20px rgba(30, 58, 95, 0.18);
            }
            .mobile-brand {
                color: #fff;
                font-size: 18px;
                font-weight: 700;
                display: flex;
                align-items: center;
                gap: 8px;
            }
            .mobile-brand i {
                color: var(--accent);
            }
            .mobile-toggle {
                width: 40px;
                height: 40px;
                border-radius: 8px;
                background: rgba(255, 255, 255, 0.1);
                color: #fff;
                font-size: 18px;
                display: flex;
                align-items: center;
                justify-content: center;
                transition: background 0.25s;
            }
            .mobile-toggle:hover {
                background: rgba(255, 255, 255, 0.2);
            }
            .mobile-menu {
                display: none;
                position: fixed;
                top: 57px;
                left: 0;
                right: 0;
                z-index: 1030;
                background: var(--deep);
                padding: 12px 20px 20px;
                box-shadow: 0 10px 30px rgba(30, 58, 95, 0.2);
            }
            .mobile-menu.show {
                display: block;
            }
            .mobile-link {
                display: flex;
                align-items: center;
                gap: 10px;
                padding: 12px 14px;
                color: rgba(255, 255, 255, 0.8);
                border-radius: 8px;
                font-size: 15px;
                transition: all 0.25s;
            }
            .mobile-link i {
                width: 20px;
                text-align: center;
            }
            .mobile-link:hover {
                background: rgba(255, 255, 255, 0.06);
                color: #fff;
            }
            .mobile-link.active {
                background: var(--accent);
                color: #fff;
            }
        }

        /* ===== Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, rgba(43, 122, 156, 0.18), rgba(62, 143, 181, 0.08)), url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            padding: 72px 0 56px;
            border-bottom: 1px solid var(--border);
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(43, 122, 156, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .page-banner h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--deep);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .page-banner p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 0;
        }

        /* ===== 通用板块 ===== */
        .section-spacer {
            padding: 64px 0;
        }
        .pt-0 {
            padding-top: 0;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-label {
            display: inline-block;
            background: #E8F1F7;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--deep);
            line-height: 1.3;
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 15px;
            margin-top: 8px;
            max-width: 620px;
        }

        /* ===== 运动卡片 ===== */
        .sport-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            height: 100%;
            transition: all 0.25s;
            border: 1px solid rgba(229, 234, 240, 0.6);
        }
        .sport-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .sport-card .card-img {
            height: 180px;
            overflow: hidden;
        }
        .sport-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .sport-card:hover .card-img img {
            transform: scale(1.03);
        }
        .sport-card .card-body {
            padding: 20px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
        }
        .card-tag {
            background: #E8F1F7;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 999px;
        }
        .card-date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .sport-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--deep);
            line-height: 1.45;
            margin-bottom: 8px;
        }
        .sport-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 标签墙 ===== */
        .tag-wall {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
        }
        .tag-wall-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 18px;
        }
        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #F0F6F9;
            color: var(--primary);
            border: 1px solid #DCECF3;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: all 0.25s;
            margin: 0 8px 10px 0;
        }
        .tag-chip i {
            font-size: 12px;
        }
        .tag-chip:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 理念卡片 ===== */
        .idea-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
            height: 100%;
            transition: all 0.25s;
        }
        .idea-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .idea-card i {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #E8F1F7;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .idea-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--deep);
            margin-bottom: 8px;
        }
        .idea-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 延伸说明 ===== */
        .about-section {
            background: var(--deep);
            border-radius: var(--radius);
            padding: 48px;
            position: relative;
            overflow: hidden;
        }
        .about-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(244, 121, 79, 0.12);
        }
        .about-label {
            display: inline-block;
            background: rgba(244, 121, 79, 0.18);
            color: #F7B49A;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .about-section h2 {
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .about-section p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            max-width: 780px;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 10px 24px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.25s;
        }
        .btn-back:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(244, 121, 79, 0.3);
        }
        .btn-back:active {
            transform: translateY(0);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--deep);
            color: rgba(255, 255, 255, 0.75);
            margin-top: auto;
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
            max-width: 300px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links,
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: all 0.25s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-links a i {
            font-size: 10px;
            color: var(--accent);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom .domain {
            opacity: 0.8;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .page-banner {
                padding: 56px 0 40px;
            }
            .section-spacer {
                padding: 48px 0;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 767.98px) {
            .page-banner {
                padding: 44px 0 34px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .section-spacer {
                padding: 40px 0;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .about-section {
                padding: 32px 24px;
            }
            .tag-wall {
                padding: 24px 20px;
            }
            .sport-card .card-img {
                height: 160px;
            }
        }

        @media (max-width: 575.98px) {
            .page-banner h1 {
                font-size: 24px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .container-leyu,
            .container {
                padding: 0 16px;
            }
            .about-section h2 {
                font-size: 19px;
            }
            .btn-back {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category5 */
:root {
            --leyu-primary: #2B7A9C;
            --leyu-primary-light: #3E8FB5;
            --leyu-accent: #F4794F;
            --leyu-accent-dark: #E05B35;
            --leyu-deep: #1E3A5F;
            --leyu-bg: #F7F9FC;
            --leyu-card: #FFFFFF;
            --leyu-text: #2B3440;
            --leyu-text-weak: #6B7A8E;
            --leyu-border: #E5EAF0;
            --leyu-radius-lg: 12px;
            --leyu-radius-sm: 8px;
            --leyu-shadow: 0 4px 20px rgba(30,58,95,0.08);
            --leyu-shadow-hover: 0 10px 30px rgba(30,58,95,0.14);
            --leyu-transition: 0.25s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
            background: var(--leyu-bg);
            color: var(--leyu-text);
            line-height: 1.75;
            font-size: 15px;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

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

        button,
        input {
            font-family: inherit;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: var(--leyu-radius-sm);
            border: 1px solid transparent;
            transition: all 0.25s ease;
            cursor: pointer;
            line-height: 1.5;
        }

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

        .btn-primary:hover,
        .btn-primary:active {
            background: var(--leyu-accent-dark);
            border-color: var(--leyu-accent-dark);
            box-shadow: 0 6px 18px rgba(244,121,79,0.3);
        }

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

        .btn-outline:hover,
        .btn-outline:active {
            background: rgba(43,122,156,0.1);
            border-color: var(--leyu-primary);
        }

        .btn:active {
            transform: translateY(1px);
        }

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

        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--leyu-deep);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .side-brand {
            padding: 32px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

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

        .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--leyu-accent);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
        }

        .brand-text {
            color: #fff;
            font-size: 19px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .side-nav-title {
            padding: 24px 24px 10px;
            font-size: 12px;
            font-weight: 600;
            color: rgba(255,255,255,0.45);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .side-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 24px;
            color: rgba(255,255,255,0.7);
            font-size: 15px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .side-link i {
            width: 20px;
            text-align: center;
            font-size: 15px;
        }

        .side-link:hover {
            background: rgba(255,255,255,0.06);
            color: #fff;
        }

        .side-link.active {
            background: rgba(255,255,255,0.08);
            color: #fff;
            border-left-color: var(--leyu-accent);
        }

        .side-foot {
            margin-top: auto;
            padding: 24px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            line-height: 2;
        }

        .side-foot i {
            margin-right: 6px;
            color: rgba(255,255,255,0.35);
        }

        .side-foot .domain {
            font-size: 12px;
            color: rgba(255,255,255,0.35);
        }

        .page-shell {
            margin-left: 240px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--leyu-deep);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
        }

        .mobile-header .mobile-brand i {
            width: 34px;
            height: 34px;
            background: var(--leyu-accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .menu-toggle {
            background: transparent;
            border: none;
            color: #fff;
            font-size: 22px;
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            cursor: pointer;
        }

        .menu-toggle:hover {
            background: rgba(255,255,255,0.1);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--leyu-deep);
            z-index: 1050;
            flex-direction: column;
            padding: 20px;
            overflow-y: auto;
        }

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

        .mobile-menu-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .mobile-menu-head .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
        }

        .mobile-menu-head .mobile-brand i {
            width: 34px;
            height: 34px;
            background: var(--leyu-accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .mobile-menu-close {
            background: transparent;
            border: none;
            color: #fff;
            font-size: 22px;
            width: 40px;
            height: 40px;
            cursor: pointer;
            border-radius: 8px;
        }

        .mobile-menu-close:hover {
            background: rgba(255,255,255,0.1);
        }

        .mobile-menu .mobile-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 15px 12px;
            color: rgba(255,255,255,0.8);
            font-size: 16px;
            font-weight: 500;
            border-radius: 8px;
            transition: background 0.25s ease;
        }

        .mobile-menu .mobile-link i {
            width: 20px;
            text-align: center;
        }

        .mobile-menu .mobile-link:hover {
            background: rgba(255,255,255,0.08);
            color: #fff;
        }

        .mobile-menu .mobile-link.active {
            background: var(--leyu-accent);
            color: #fff;
        }

        .topic-banner {
            background: linear-gradient(rgba(30,58,95,0.85), rgba(30,58,95,0.65)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 72px 0 64px;
            color: #fff;
        }

        .topic-banner h1 {
            font-size: 36px;
            font-weight: 700;
            margin: 0 0 14px;
            line-height: 1.3;
            letter-spacing: 0.5px;
        }

        .topic-banner p {
            font-size: 16px;
            color: rgba(255,255,255,0.85);
            max-width: 560px;
            margin: 0;
            line-height: 1.8;
        }

        .topic-banner .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255,255,255,0.15);
            border: 1px solid rgba(255,255,255,0.2);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 18px;
        }

        .section-head {
            text-align: center;
            max-width: 660px;
            margin: 0 auto 48px;
        }

        .section-head .sec-tag {
            display: inline-block;
            background: #E8F1F7;
            color: var(--leyu-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--leyu-deep);
            margin: 0 0 12px;
            line-height: 1.4;
        }

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

        .alternate-section {
            padding: 64px 0 40px;
        }

        .alternate-row {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 48px;
        }

        .alternate-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .alternate-text {
            flex: 1;
            padding: 20px 0;
        }

        .alternate-text .alt-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--leyu-accent);
            letter-spacing: 1px;
            margin-bottom: 10px;
        }

        .alternate-text h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--leyu-deep);
            margin: 0 0 12px;
            line-height: 1.4;
        }

        .alternate-text p {
            color: var(--leyu-text-weak);
            font-size: 15px;
            margin: 0 0 16px;
            line-height: 1.8;
        }

        .alternate-text .alt-link {
            color: var(--leyu-primary);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.25s ease;
        }

        .alternate-text .alt-link:hover {
            gap: 10px;
            color: var(--leyu-accent-dark);
        }

        .alternate-media {
            flex: 1;
        }

        .alternate-media .img-card {
            border-radius: var(--leyu-radius-lg);
            overflow: hidden;
            box-shadow: var(--leyu-shadow);
            position: relative;
        }

        .alternate-media .img-card img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .alternate-media .img-card:hover img {
            transform: scale(1.03);
        }

        .alternate-media .img-card .img-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--leyu-accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }

        .faq-section {
            padding: 40px 0 64px;
        }

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

        .accordion-custom {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion-custom .accordion-item {
            border: 1px solid var(--leyu-border);
            border-radius: var(--leyu-radius-lg) !important;
            margin-bottom: 16px;
            background: var(--leyu-card);
            overflow: hidden;
            box-shadow: none;
        }

        .accordion-custom .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-custom .accordion-button {
            background: var(--leyu-card);
            color: var(--leyu-text);
            font-size: 15px;
            font-weight: 600;
            padding: 18px 22px;
            box-shadow: none;
            border: none;
        }

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

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-custom .accordion-button::after {
            background-image: none;
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--leyu-text-weak);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            transition: transform 0.25s ease;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--leyu-primary);
        }

        .accordion-custom .accordion-body {
            background: var(--leyu-bg);
            padding: 18px 22px;
            color: var(--leyu-text-weak);
            font-size: 14px;
            line-height: 1.8;
        }

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

        .desc-card {
            background: var(--leyu-card);
            border-radius: var(--leyu-radius-lg);
            box-shadow: var(--leyu-shadow);
            padding: 36px;
            border-left: 4px solid var(--leyu-accent);
            max-width: 800px;
            margin: 0 auto;
        }

        .desc-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--leyu-deep);
            margin: 0 0 14px;
        }

        .desc-card p {
            color: var(--leyu-text-weak);
            font-size: 15px;
            line-height: 1.8;
            margin: 0;
        }

        .cta-section {
            padding: 32px 0 64px;
        }

        .cta-card {
            background: rgba(43,122,156,0.08);
            border-radius: var(--leyu-radius-lg);
            border: 1px solid rgba(43,122,156,0.12);
            padding: 48px 36px;
            text-align: center;
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--leyu-deep);
            margin: 0 0 12px;
        }

        .cta-card p {
            color: var(--leyu-text-weak);
            font-size: 15px;
            margin: 0 auto 24px;
            max-width: 600px;
        }

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

        .site-footer {
            background: var(--leyu-deep);
            color: rgba(255,255,255,0.6);
            padding: 48px 0 0;
            margin-top: auto;
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255,255,255,0.55);
            margin: 0;
            max-width: 360px;
        }

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

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

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

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .footer-links a:hover {
            color: var(--leyu-accent);
            padding-left: 4px;
        }

        .footer-links i {
            font-size: 10px;
            color: rgba(255,255,255,0.35);
        }

        .footer-contact li {
            font-size: 14px;
            color: rgba(255,255,255,0.55);
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .footer-contact i {
            width: 18px;
            color: rgba(255,255,255,0.35);
            margin-top: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 16px 0;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            text-align: center;
            color: rgba(255,255,255,0.4);
        }

        .footer-bottom .domain {
            color: rgba(255,255,255,0.3);
            font-size: 12px;
        }

        @media (max-width: 1199px) {
            .alternate-row {
                gap: 32px;
            }
        }

        @media (max-width: 991px) {
            .side-nav {
                display: none;
            }

            .page-shell {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
            }

            .topic-banner {
                padding: 56px 0 48px;
            }

            .topic-banner h1 {
                font-size: 30px;
            }

            .section-head h2 {
                font-size: 23px;
            }
        }

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

            .alternate-row,
            .alternate-row:nth-child(even) {
                flex-direction: column;
                gap: 24px;
                margin-bottom: 40px;
            }

            .alternate-text {
                padding: 0;
            }

            .alternate-media {
                width: 100%;
            }

            .alternate-media .img-card img {
                height: 200px;
            }

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

            .cta-card {
                padding: 32px 20px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

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

            .desc-card {
                padding: 24px;
            }
        }

        @media (max-width: 520px) {
            .topic-banner h1 {
                font-size: 26px;
            }

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

            .section-head h2 {
                font-size: 20px;
            }

            .alternate-text h3 {
                font-size: 18px;
            }

            .footer-links,
            .footer-contact {
                font-size: 14px;
            }
        }

/* roulang page: category4 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2B7A9C;
            --primary-dark: #1E5F7A;
            --primary-light: #E8F1F7;
            --accent: #F4794F;
            --accent-dark: #E05B35;
            --accent-light: #FFF0EB;
            --navy: #1E3A5F;
            --navy-light: #2A4A73;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text-main: #2B3440;
            --text-muted: #6B7A8E;
            --text-light: #94A3B3;
            --border: #E5EAF0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
            --shadow-hover: 0 10px 30px rgba(30, 58, 95, 0.14);
            --transition: all 0.25s ease;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }

        /* ===== 通用容器 ===== */
        .container-leyu {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 左侧导航（桌面端固定） ===== */
        .side-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: 240px;
            height: 100vh;
            background: var(--navy);
            z-index: 1055;
            display: flex;
            flex-direction: column;
            padding-bottom: 20px;
            overflow-y: auto;
            transition: transform 0.3s ease;
        }
        .side-brand {
            padding: 28px 22px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 14px;
        }
        .side-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(244, 121, 79, 0.3);
        }
        .logo-text {
            font-size: 21px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
            line-height: 1.2;
        }
        .side-brand-sub {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 8px;
            padding-left: 46px;
            letter-spacing: 3px;
        }
        .side-nav-title {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
            padding: 8px 22px 10px;
            letter-spacing: 2px;
            text-transform: uppercase;
        }
        .side-link {
            display: flex;
            align-items: center;
            gap: 13px;
            padding: 12px 22px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: var(--transition);
        }
        .side-link i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            opacity: 0.85;
        }
        .side-link:hover {
            background: rgba(255, 255, 255, 0.07);
            color: #fff;
            border-left-color: rgba(244, 121, 79, 0.5);
        }
        .side-link.active {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .side-meta {
            margin-top: auto;
            padding: 20px 22px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            font-size: 12.5px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.7;
        }
        .side-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 6px;
        }
        .side-copyright {
            margin-top: 12px;
            font-size: 11.5px;
            color: rgba(255, 255, 255, 0.35);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 10px;
        }

        /* ===== 移动端顶部导航条 ===== */
        .mobile-topbar {
            position: sticky;
            top: 0;
            z-index: 1060;
            display: none;
            align-items: center;
            justify-content: space-between;
            background: var(--navy);
            padding: 12px 20px;
            box-shadow: 0 4px 20px rgba(30, 58, 95, 0.25);
        }
        .mobile-brand {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 9px;
        }
        .mobile-brand i {
            color: var(--accent);
            font-size: 17px;
        }
        .mobile-menu-btn {
            width: 40px;
            height: 40px;
            border: none;
            border-radius: 9px;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 17px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.18);
        }
        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(30, 58, 95, 0.5);
            z-index: 1050;
            display: none;
            backdrop-filter: blur(2px);
        }
        .nav-overlay.show {
            display: block;
        }
        body.nav-open {
            overflow: hidden;
        }

        /* ===== 主内容区 ===== */
        .layout-main {
            margin-left: 240px;
            min-height: 100vh;
            background: var(--bg);
        }

        /* ===== 分类 Banner（灰白布局B） ===== */
        .category-banner {
            position: relative;
            padding: 80px 0 70px;
            background: linear-gradient(120deg, rgba(255, 255, 255, 0.93) 0%, rgba(240, 246, 250, 0.88) 50%, rgba(232, 241, 247, 0.85) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }
        .category-banner .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .category-banner h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 12px;
            line-height: 1.25;
        }
        .category-banner .banner-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0;
            line-height: 1.75;
        }

        /* ===== 板块标题 ===== */
        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== 百科知识网格卡片 ===== */
        .wiki-grid-section {
            padding: 68px 0 56px;
        }
        .wiki-grid-section .row .col-lg-4 {
            margin-bottom: 24px;
        }
        .wiki-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid rgba(229, 234, 240, 0.65);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .wiki-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .card-img-wrap {
            height: 190px;
            overflow: hidden;
            position: relative;
        }
        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .wiki-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-tag {
            align-self: flex-start;
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 13px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }
        .card-title {
            font-size: 17px;
            font-weight: 600;
            margin: 12px 0 8px;
            line-height: 1.45;
        }
        .card-title a {
            color: var(--text-main);
        }
        .card-title a:hover {
            color: var(--primary);
        }
        .card-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 16px;
            padding-top: 13px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-light);
        }
        .card-meta span i {
            margin-right: 4px;
            font-size: 12px;
        }
        .read-more {
            color: var(--primary);
            font-weight: 500;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            cursor: pointer;
        }
        .read-more i {
            transition: transform 0.2s ease;
            font-size: 12px;
        }
        .read-more:hover i {
            transform: translateX(3px);
        }
        .read-more:hover {
            color: var(--accent);
        }

        /* ===== 延伸说明区 ===== */
        .wiki-note-section {
            padding: 20px 0 64px;
        }
        .wiki-note-box {
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 36px 40px;
            box-shadow: var(--shadow);
        }
        .wiki-note-box h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px;
        }
        .wiki-note-box p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            margin: 0 0 22px;
            max-width: 860px;
        }
        .wiki-note-box .btn {
            min-width: 140px;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section {
            background: var(--bg);
            padding: 64px 0 56px;
            border-top: 1px solid var(--border);
        }
        .faq-section .accordion {
            max-width: 860px;
            margin: 0 auto;
        }
        .accordion {
            --bs-accordion-border-color: var(--border);
            --bs-accordion-border-radius: var(--radius);
            --bs-accordion-inner-border-radius: var(--radius);
            --bs-accordion-padding-y: 18px;
            --bs-accordion-padding-x: 22px;
            --bs-accordion-transition: var(--transition);
        }
        .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            background: #fff;
            box-shadow: none;
            padding: 17px 22px;
            line-height: 1.5;
        }
        .accordion-button:not(.collapsed) {
            background: #f2f6f9;
            color: var(--primary);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(43, 122, 156, 0.15);
        }
        .accordion-button::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            background-image: none;
            color: var(--primary);
            font-size: 13px;
            width: auto;
            height: auto;
            transition: transform 0.25s ease;
        }
        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }
        .accordion-item {
            border-radius: var(--radius) !important;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(30, 58, 95, 0.04);
            margin-bottom: 14px;
        }
        .accordion-body {
            background: #F7F9FC;
            padding: 16px 22px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.75;
        }

        /* ===== CTA 区 ===== */
        .cta-section {
            padding: 20px 0 68px;
        }
        .cta-box {
            background: rgba(43, 122, 156, 0.06);
            border: 1px solid rgba(43, 122, 156, 0.14);
            border-radius: var(--radius);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }
        .cta-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
        }
        .cta-content p {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0;
        }
        .cta-form {
            flex: 0 0 420px;
            max-width: 100%;
        }
        .cta-input-group {
            display: flex;
            gap: 10px;
        }
        .cta-input-group .form-control {
            flex: 1;
            height: 46px;
            border-radius: var(--radius-sm);
            border: 1px solid #D7DEE8;
            padding: 0 16px;
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
            background: #fff;
        }
        .cta-input-group .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 122, 156, 0.15);
            outline: none;
        }
        .cta-input-group .form-control::placeholder {
            color: var(--text-light);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            padding: 10px 24px;
            border: none;
            transition: var(--transition);
            cursor: pointer;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(244, 121, 79, 0.25);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(224, 91, 53, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline-primary {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: rgba(43, 122, 156, 0.08);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 13px 32px;
            font-size: 16px;
            border-radius: 10px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--navy);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 40px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14.5px;
            line-height: 1.8;
            margin: 12px 0 0;
            max-width: 340px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links,
        .footer-contact {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 9px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.68);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 7px;
            transition: var(--transition);
        }
        .footer-links a i {
            font-size: 11px;
            color: var(--accent);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.68);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact li i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-bottom .domain {
            color: rgba(255, 255, 255, 0.7);
            margin-left: 4px;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1199.98px) {
            .footer-grid {
                gap: 34px;
            }
        }

        @media (max-width: 991.98px) {
            .side-nav {
                transform: translateX(-100%);
            }
            .side-nav.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .layout-main {
                margin-left: 0;
            }
            .category-banner {
                padding: 56px 0 48px;
            }
            .category-banner h1 {
                font-size: 32px;
            }
            .cta-box {
                padding: 34px 30px;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-form {
                flex: 1 1 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767.98px) {
            .container-leyu {
                padding-left: 18px;
                padding-right: 18px;
            }
            .category-banner {
                padding: 44px 0 38px;
            }
            .category-banner h1 {
                font-size: 27px;
            }
            .category-banner .banner-desc {
                font-size: 14.5px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .wiki-grid-section {
                padding: 48px 0 36px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .wiki-note-box {
                padding: 26px 24px;
            }
            .cta-box {
                padding: 28px 22px;
            }
            .cta-input-group {
                flex-direction: column;
            }
            .cta-input-group .form-control {
                width: 100%;
            }
        }

        @media (max-width: 575.98px) {
            .card-img-wrap {
                height: 170px;
            }
            .card-title {
                font-size: 16px;
            }
            .category-banner h1 {
                font-size: 24px;
            }
            .section-head {
                margin-bottom: 30px;
            }
            .btn-lg {
                width: 100%;
            }
            .wiki-note-box .btn {
                width: 100%;
            }
            .footer-bottom {
                font-size: 12px;
                padding: 16px 12px;
            }
        }

        @media (max-width: 420px) {
            .mobile-brand {
                font-size: 17px;
            }
            .category-banner {
                padding: 36px 0 32px;
            }
            .cta-content h2 {
                font-size: 21px;
            }
        }