/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1A3C6E;
        --primary-dark: #0f2a4a;
        --primary-light: #2B59A0;
        --accent: #FF6F3C;
        --accent-light: #FF8C42;
        --accent-dark: #e85a2a;
        --success: #27AE60;
        --error: #E74C3C;
        --warning: #F39C12;
        --disabled: #B0BEC5;
        --bg-light: #E8F0FE;
        --bg-warm: #FAFAF9;
        --bg-white: #FFFFFF;
        --text-dark: #2D2D2D;
        --text-mid: #666666;
        --text-light: #999999;
        --border-light: #E8E8E8;
        --radius-sm: 4px;
        --radius-md: 8px;
        --radius-lg: 16px;
        --shadow-card: 0 4px 12px rgba(26,60,110,0.08);
        --shadow-card-hover: 0 8px 24px rgba(26,60,110,0.15);
        --shadow-nav: 0 2px 8px rgba(0,0,0,0.04);
        --transition: 0.25s ease;
        --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
        --container-max: 1280px;
        --header-height: 72px;
        --header-height-mobile: 56px;
        --spacer-section: 4rem;
        --spacer-section-mobile: 2.5rem;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
    body {
        font-family: var(--font-family);
        font-size: 1rem;
        line-height: 1.6;
        color: var(--text-dark);
        background: var(--bg-warm);
    }
    a { color: inherit; text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; }

    /* ===== 容器 ===== */
    .container {
        max-width: var(--container-max);
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
    }
    @media (max-width: 768px) {
        .container { padding-left: 16px; padding-right: 16px; }
    }

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 48px;
        padding: 12px 28px;
        border-radius: var(--radius-md);
        font-size: 1.125rem;
        font-weight: 600;
        cursor: pointer;
        transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
        border: none;
        line-height: 1.2;
        gap: 8px;
    }
    .btn:active { transform: scale(0.97); }
    .btn-primary {
        background: linear-gradient(135deg, var(--accent), var(--accent-light));
        color: #fff;
        box-shadow: 0 4px 14px rgba(255,111,60,0.3);
    }
    .btn-primary:hover { filter: brightness(1.15); box-shadow: 0 6px 20px rgba(255,111,60,0.4); color: #fff; }
    .btn-secondary {
        background: transparent;
        color: var(--primary);
        border: 2px solid var(--primary);
    }
    .btn-secondary:hover { background: var(--primary); color: #fff; }
    .btn-sm { min-height: 40px; padding: 8px 20px; font-size: 0.95rem; }

    /* ===== 标签 / Tag ===== */
    .tag {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 20px;
        background: var(--bg-light);
        color: var(--primary);
        font-size: 0.8rem;
        font-weight: 500;
        line-height: 1.4;
        transition: background var(--transition);
    }
    .tag:hover { background: var(--primary); color: #fff; }

    /* ===== 徽章 / Badge ===== */
    .badge {
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 24px 28px;
        border-radius: var(--radius-lg);
        background: var(--bg-light);
        text-align: center;
        min-width: 120px;
        box-shadow: var(--shadow-card);
        transition: transform var(--transition), box-shadow var(--transition);
    }
    .badge:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
    .badge-number {
        font-size: 1.8rem;
        font-weight: 700;
        color: var(--accent);
        line-height: 1.2;
    }
    .badge-label {
        font-size: 0.875rem;
        color: var(--text-mid);
        margin-top: 6px;
    }

    /* ===== 卡片 ===== */
    .card {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: transform var(--transition), box-shadow var(--transition);
    }
    .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
    .card-img {
        width: 100%;
        aspect-ratio: 16 / 9;
        object-fit: cover;
        display: block;
    }
    .card-body { padding: 24px; }
    .card-title {
        font-size: 1.25rem;
        font-weight: 600;
        color: var(--text-dark);
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .card-summary {
        font-size: 0.95rem;
        color: var(--text-mid);
        line-height: 1.5;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 12px;
    }
    .card-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 0.85rem;
        color: var(--text-light);
    }
    .card-link {
        color: var(--accent);
        font-weight: 500;
        font-size: 0.95rem;
        display: inline-flex;
        align-items: center;
        gap: 4px;
        transition: gap var(--transition);
    }
    .card-link:hover { gap: 8px; color: var(--accent-dark); }
    .card-link i { font-size: 0.8rem; }

    /* ===== 导航 ===== */
    .header {
        position: fixed;
        top: 0; left: 0; right: 0;
        height: var(--header-height);
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-light);
        z-index: 1000;
        box-shadow: var(--shadow-nav);
    }
    .header-inner {
        display: flex;
        align-items: center;
        height: 100%;
        justify-content: space-between;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.4rem;
        font-weight: 700;
        color: var(--primary);
        flex-shrink: 0;
    }
    .logo-icon {
        width: 36px;
        height: 36px;
        fill: var(--primary);
        flex-shrink: 0;
    }
    .logo-text { white-space: nowrap; }
    .nav-wrapper {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .nav-wrapper::-webkit-scrollbar { display: none; }
    .nav-tab {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 8px 20px;
        border-radius: 20px;
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-dark);
        background: transparent;
        white-space: nowrap;
        transition: background var(--transition), color var(--transition);
        cursor: pointer;
        border: none;
    }
    .nav-tab:hover { background: var(--bg-light); color: var(--primary); }
    .nav-tab.active {
        background: var(--primary);
        color: #fff;
    }
    .nav-cta {
        margin-left: 12px;
        flex-shrink: 0;
    }
    .nav-cta .btn { min-height: 40px; padding: 8px 22px; font-size: 0.95rem; }
    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
    }
    .hamburger span {
        display: block;
        width: 26px;
        height: 2.5px;
        background: var(--primary);
        border-radius: 2px;
        transition: var(--transition);
    }
    .mobile-menu {
        display: none;
        position: fixed;
        top: var(--header-height-mobile);
        left: 0; right: 0;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-card);
        padding: 16px 20px;
        z-index: 999;
    }
    .mobile-menu.open { display: block; }
    .mobile-menu .nav-tab {
        display: block;
        width: 100%;
        text-align: left;
        padding: 12px 16px;
        border-radius: var(--radius-md);
        font-size: 1rem;
    }
    .mobile-menu .nav-tab.active { background: var(--primary); color: #fff; }
    .mobile-menu .nav-cta { margin-left: 0; margin-top: 12px; }
    .mobile-menu .nav-cta .btn { width: 100%; }

    @media (max-width: 768px) {
        .header { height: var(--header-height-mobile); }
        .nav-wrapper { display: none; }
        .hamburger { display: flex; }
        .logo { font-size: 1.2rem; }
        .logo-icon { width: 30px; height: 30px; }
        .mobile-menu { top: var(--header-height-mobile); }
    }
    @media (min-width: 769px) {
        .mobile-menu { display: none !important; }
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 70vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: radial-gradient(ellipse at 30% 40%, var(--primary-light), var(--primary));
        overflow: hidden;
        padding: 120px 20px 80px;
        margin-top: var(--header-height);
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image:
            radial-gradient(circle at 20% 30%, rgba(255,255,255,0.04) 2px, transparent 2px),
            radial-gradient(circle at 60% 70%, rgba(255,255,255,0.04) 2px, transparent 2px),
            radial-gradient(circle at 80% 20%, rgba(255,255,255,0.03) 2px, transparent 2px),
            radial-gradient(circle at 40% 80%, rgba(255,255,255,0.04) 2px, transparent 2px);
        background-size: 60px 60px, 80px 80px, 50px 50px, 70px 70px;
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 800px;
    }
    .hero h1 {
        font-size: 2.8rem;
        font-weight: 700;
        color: #fff;
        line-height: 1.2;
        margin-bottom: 20px;
        text-shadow: 0 2px 12px rgba(0,0,0,0.15);
    }
    .hero-sub {
        font-size: 1.2rem;
        color: rgba(255,255,255,0.85);
        line-height: 1.6;
        max-width: 640px;
        margin: 0 auto 32px;
    }
    .hero-actions {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .hero-badges {
        display: flex;
        gap: 20px;
        justify-content: center;
        flex-wrap: wrap;
        margin-top: 48px;
    }
    .hero-badges .badge {
        background: rgba(255,255,255,0.12);
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
        border: 1px solid rgba(255,255,255,0.15);
        box-shadow: none;
        min-width: 130px;
        padding: 20px 24px;
    }
    .hero-badges .badge-number { color: var(--accent-light); }
    .hero-badges .badge-label { color: rgba(255,255,255,0.8); }

    @media (max-width: 768px) {
        .hero { min-height: 50vh; padding: 100px 16px 60px; margin-top: var(--header-height-mobile); }
        .hero h1 { font-size: 1.75rem; }
        .hero-sub { font-size: 1rem; }
        .hero-badges { gap: 12px; margin-top: 32px; }
        .hero-badges .badge { min-width: 100px; padding: 14px 16px; }
        .hero-badges .badge-number { font-size: 1.4rem; }
    }

    /* ===== 板块通用 ===== */
    .section {
        padding: var(--spacer-section) 0;
    }
    .section-title {
        text-align: center;
        margin-bottom: 12px;
    }
    .section-title h2 {
        font-size: 2rem;
        font-weight: 600;
        color: var(--text-dark);
    }
    .section-title p {
        font-size: 1.05rem;
        color: var(--text-mid);
        margin-top: 8px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }
    .section-bg-light { background: var(--bg-light); }
    .section-bg-warm { background: var(--bg-warm); }
    .section-bg-white { background: var(--bg-white); }

    @media (max-width: 768px) {
        .section { padding: var(--spacer-section-mobile) 0; }
        .section-title h2 { font-size: 1.5rem; }
        .section-title p { font-size: 0.95rem; }
    }

    /* ===== 品牌故事 ===== */
    .story-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }
    .story-image img {
        width: 100%;
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card);
        object-fit: cover;
        aspect-ratio: 4 / 3;
    }
    .story-text h3 {
        font-size: 1.6rem;
        font-weight: 600;
        color: var(--text-dark);
        margin-bottom: 16px;
    }
    .story-text p {
        color: var(--text-mid);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .story-text p:last-child { margin-bottom: 0; }

    @media (max-width: 768px) {
        .story-grid { grid-template-columns: 1fr; gap: 24px; }
        .story-text h3 { font-size: 1.3rem; }
    }

    /* ===== 核心优势 ===== */
    .advantages-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        margin-top: 32px;
    }
    .advantage-item {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        padding: 32px 24px;
        text-align: center;
        box-shadow: var(--shadow-card);
        transition: transform var(--transition), box-shadow var(--transition);
    }
    .advantage-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-card-hover); }
    .advantage-icon {
        font-size: 2.4rem;
        color: var(--accent);
        margin-bottom: 16px;
    }
    .advantage-item h4 {
        font-size: 1.15rem;
        font-weight: 600;
        color: var(--text-dark);
        margin-bottom: 8px;
    }
    .advantage-item p {
        font-size: 0.9rem;
        color: var(--text-mid);
        line-height: 1.5;
    }

    @media (max-width: 1024px) {
        .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 520px) {
        .advantages-grid { grid-template-columns: 1fr; }
    }

    /* ===== 最新资讯 (CMS列表) ===== */
    .cms-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
        margin-top: 32px;
    }
    .cms-item { cursor: pointer; }
    .cms-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 48px 20px;
        color: var(--text-mid);
        font-size: 1rem;
        background: var(--bg-light);
        border-radius: var(--radius-lg);
    }

    @media (max-width: 1024px) {
        .cms-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    }
    @media (max-width: 520px) {
        .cms-grid { grid-template-columns: 1fr; }
    }

    /* ===== 信任背书 ===== */
    .trust-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 24px;
        justify-content: center;
        margin-top: 32px;
    }
    .trust-grid .badge { min-width: 150px; padding: 28px 32px; }
    .trust-quote {
        max-width: 700px;
        margin: 40px auto 0;
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        padding: 36px 40px;
        box-shadow: var(--shadow-card);
        position: relative;
        text-align: center;
    }
    .trust-quote::before {
        content: '\f10d';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 2rem;
        color: var(--bg-light);
        position: absolute;
        top: -14px;
        left: 24px;
    }
    .trust-quote p {
        font-size: 1.05rem;
        color: var(--text-mid);
        line-height: 1.7;
        font-style: italic;
    }
    .trust-quote cite {
        display: block;
        margin-top: 12px;
        font-style: normal;
        font-weight: 600;
        color: var(--text-dark);
        font-size: 0.95rem;
    }

    @media (max-width: 520px) {
        .trust-grid .badge { min-width: 120px; padding: 20px 16px; }
        .trust-quote { padding: 24px 20px; }
        .trust-quote p { font-size: 0.95rem; }
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 780px;
        margin: 32px auto 0;
    }
    .faq-item {
        background: var(--bg-white);
        border-radius: var(--radius-md);
        margin-bottom: 12px;
        box-shadow: 0 2px 8px rgba(0,0,0,0.04);
        overflow: hidden;
        transition: box-shadow var(--transition);
    }
    .faq-item:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        background: none;
        border: none;
        font-size: 1rem;
        font-weight: 500;
        color: var(--text-dark);
        cursor: pointer;
        text-align: left;
        transition: background var(--transition);
        gap: 12px;
    }
    .faq-question:hover { background: var(--bg-light); }
    .faq-question i {
        transition: transform var(--transition);
        color: var(--accent);
        font-size: 0.9rem;
        flex-shrink: 0;
    }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 24px;
        color: var(--text-mid);
        line-height: 1.6;
        font-size: 0.95rem;
        border-left: 3px solid var(--accent);
        margin: 0 24px;
        background: var(--bg-warm);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 16px 24px;
        margin-bottom: 12px;
    }

    @media (max-width: 520px) {
        .faq-question { padding: 14px 16px; font-size: 0.95rem; }
        .faq-answer { margin: 0 16px; }
        .faq-item.open .faq-answer { padding: 12px 16px; }
    }

    /* ===== 订阅 CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        padding: 64px 0;
        text-align: center;
    }
    .cta-section h2 {
        font-size: 2rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 8px;
    }
    .cta-section p {
        font-size: 1.05rem;
        color: rgba(255,255,255,0.85);
        margin-bottom: 28px;
    }
    .cta-form {
        display: flex;
        gap: 12px;
        justify-content: center;
        flex-wrap: wrap;
        max-width: 560px;
        margin: 0 auto;
    }
    .cta-form input[type="email"] {
        flex: 1;
        min-width: 220px;
        padding: 14px 20px;
        border-radius: var(--radius-sm);
        border: 2px solid transparent;
        background: var(--bg-white);
        font-size: 1rem;
        color: var(--text-dark);
        transition: border-color var(--transition), box-shadow var(--transition);
    }
    .cta-form input[type="email"]:focus {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(255,111,60,0.2);
    }
    .cta-form input[type="email"]::placeholder { color: var(--text-light); }

    @media (max-width: 520px) {
        .cta-section { padding: 48px 0; }
        .cta-section h2 { font-size: 1.5rem; }
        .cta-form input[type="email"] { min-width: 140px; }
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--primary-dark);
        color: rgba(255,255,255,0.8);
        padding: 48px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 32px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand .logo { color: #fff; }
    .footer-brand .logo-icon { fill: #fff; }
    .footer-brand p {
        margin-top: 16px;
        font-size: 0.9rem;
        line-height: 1.6;
        color: rgba(255,255,255,0.6);
        max-width: 300px;
    }
    .footer-col h4 {
        font-size: 1rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a {
        font-size: 0.9rem;
        color: rgba(255,255,255,0.6);
        transition: color var(--transition);
    }
    .footer-col ul li a:hover { color: var(--accent); }
    .footer-contact li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        font-size: 0.9rem;
        color: rgba(255,255,255,0.6);
        margin-bottom: 12px;
    }
    .footer-contact i { color: var(--accent); margin-top: 4px; min-width: 16px; }
    .footer-social {
        display: flex;
        gap: 10px;
        margin-top: 12px;
    }
    .footer-social a {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: var(--radius-md);
        background: rgba(255,255,255,0.08);
        color: rgba(255,255,255,0.7);
        font-size: 1.1rem;
        transition: background var(--transition), color var(--transition);
    }
    .footer-social a:hover { background: var(--accent); color: #fff; }
    .footer-bottom {
        text-align: center;
        padding: 20px 0;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.4);
    }

    @media (max-width: 1024px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-brand p { max-width: 100%; }
    }

    /* ===== 文章页面通用 ===== */
    .breadcrumb {
        padding: 16px 0 8px;
        font-size: 0.85rem;
        color: var(--text-light);
    }
    .breadcrumb a { color: var(--text-mid); }
    .breadcrumb a:hover { color: var(--accent); }
    .breadcrumb span { color: var(--primary); font-weight: 500; }

    /* ===== 动画 ===== */
    @keyframes fadeUp {
        from { opacity: 0; transform: translateY(20px); }
        to { opacity: 1; transform: translateY(0); }
    }
    .animate-fade-up { animation: fadeUp 0.6s ease forwards; }

    /* ===== 辅助 ===== */
    .text-center { text-align: center; }
    .mt-16 { margin-top: 16px; }
    .mt-24 { margin-top: 24px; }
    .mt-32 { margin-top: 32px; }
    .mb-16 { margin-bottom: 16px; }
    .mb-24 { margin-bottom: 24px; }
    .gap-12 { gap: 12px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .flex-wrap { flex-wrap: wrap; }

/* roulang page: article */
/* ===== Design System ===== */
        :root {
            --primary: #1A3C6E;
            --primary-dark: #0F2A4E;
            --primary-light: #2B59A0;
            --accent: #FF6F3C;
            --accent-light: #FF8C42;
            --accent-glow: #FF5A1F;
            --bg-light: #FAFAF9;
            --bg-card: #E8F0FE;
            --bg-white: #FFFFFF;
            --text-primary: #2D2D2D;
            --text-secondary: #666666;
            --text-light: #999999;
            --text-white: #FFFFFF;
            --border-light: #E5E9F0;
            --success: #27AE60;
            --error: #E74C3C;
            --warning: #F39C12;
            --disabled: #B0BEC5;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26,60,110,0.06);
            --shadow-md: 0 4px 12px rgba(26,60,110,0.08);
            --shadow-lg: 0 8px 24px rgba(26,60,110,0.15);
            --shadow-xl: 0 16px 40px rgba(26,60,110,0.12);
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            --container-max: 1280px;
            --header-height: 72px;
            --header-height-mobile: 56px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --gradient-primary: linear-gradient(135deg, #1A3C6E 0%, #2B59A0 100%);
            --gradient-accent: linear-gradient(135deg, #FF6F3C 0%, #FF8C42 100%);
            --gradient-hero: radial-gradient(ellipse at 30% 40%, #1A3C6E 0%, #0F2A4E 70%, #091B33 100%);
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; }

        /* ===== Utility ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        .section { padding: 4rem 0; }
        @media (max-width: 768px) { .section { padding: 2.5rem 0; } }

        .sr-only {
            position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
            overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            min-height: 48px; padding: 12px 28px; border-radius: var(--radius-md);
            font-size: 1.125rem; font-weight: 600; line-height: 1.2;
            transition: var(--transition); cursor: pointer; border: none;
            text-decoration: none; white-space: nowrap;
        }
        .btn:active { transform: scale(0.97); }
        .btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

        .btn-primary {
            background: var(--gradient-accent); color: var(--text-white);
            box-shadow: 0 4px 14px rgba(255,111,60,0.35);
        }
        .btn-primary:hover { filter: brightness(1.12); box-shadow: 0 6px 20px rgba(255,111,60,0.45); }

        .btn-secondary {
            background: transparent; color: var(--primary); border: 2px solid var(--primary);
        }
        .btn-secondary:hover { background: var(--primary); color: var(--text-white); }

        .btn-sm { min-height: 40px; padding: 8px 20px; font-size: 0.95rem; }
        .btn-lg { min-height: 56px; padding: 16px 36px; font-size: 1.25rem; }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-height); background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 6px rgba(26,60,110,0.04);
            transition: var(--transition);
        }
        @media (max-width: 768px) {
            .header { height: var(--header-height-mobile); }
        }

        .header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.35rem; font-weight: 700; color: var(--primary);
            text-decoration: none; flex-shrink: 0;
        }
        .logo-icon { width: 36px; height: 36px; color: var(--accent); flex-shrink: 0; }
        .logo-text { letter-spacing: 1px; }
        @media (max-width: 768px) {
            .logo { font-size: 1.15rem; }
            .logo-icon { width: 30px; height: 30px; }
        }

        /* Nav tabs */
        .nav-wrapper {
            display: flex; align-items: center; gap: 6px;
            background: var(--bg-card); padding: 4px 6px; border-radius: 12px;
            flex-wrap: wrap;
        }
        .nav-tab {
            display: inline-flex; align-items: center; justify-content: center;
            padding: 8px 18px; border-radius: var(--radius-md);
            font-size: 0.95rem; font-weight: 500; color: var(--text-primary);
            text-decoration: none; transition: var(--transition);
            white-space: nowrap;
        }
        .nav-tab:hover { background: rgba(26,60,110,0.08); }
        .nav-tab.active { background: var(--primary); color: var(--text-white); }
        .nav-tab.active:hover { background: var(--primary-dark); }

        .nav-cta { margin-left: 6px; }
        .nav-cta .btn { min-height: 38px; padding: 6px 20px; font-size: 0.9rem; border-radius: var(--radius-md); }

        /* Hamburger */
        .hamburger {
            display: none; flex-direction: column; gap: 5px; padding: 8px;
            background: none; border: none; cursor: pointer;
        }
        .hamburger span {
            display: block; width: 24px; height: 2.5px; background: var(--primary);
            border-radius: 2px; transition: var(--transition);
        }

        /* Mobile nav */
        @media (max-width: 900px) {
            .nav-wrapper {
                display: none; position: absolute; top: 100%; left: 0; right: 0;
                flex-direction: column; background: var(--bg-white);
                padding: 16px 20px; border-radius: 0 0 16px 16px;
                box-shadow: var(--shadow-lg); border: 1px solid var(--border-light);
                gap: 8px; align-items: stretch;
            }
            .nav-wrapper.open { display: flex; }
            .nav-tab { padding: 12px 16px; font-size: 1rem; }
            .nav-cta { margin-left: 0; margin-top: 8px; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .hamburger { display: flex; }
        }

        /* ===== Hero Banner (文章页顶部区域) ===== */
        .article-hero {
            margin-top: var(--header-height);
            padding: 2.5rem 0 2rem;
            background: var(--gradient-primary);
            position: relative; overflow: hidden;
        }
        .article-hero::after {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.08; pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 1; }
        @media (max-width: 768px) {
            .article-hero { margin-top: var(--header-height-mobile); padding: 1.5rem 0 1.2rem; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px;
            font-size: 0.9rem; color: rgba(255,255,255,0.75); margin-bottom: 0.8rem;
        }
        .breadcrumb a { color: rgba(255,255,255,0.8); text-decoration: none; }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: rgba(255,255,255,0.4); }
        .breadcrumb .current { color: var(--accent); font-weight: 500; }

        /* ===== Article Main ===== */
        .article-main {
            padding: 2.5rem 0 3.5rem;
        }
        .article-container {
            max-width: 800px; margin: 0 auto;
        }
        @media (max-width: 768px) {
            .article-main { padding: 1.5rem 0 2.5rem; }
        }

        /* Article Header */
        .article-header {
            margin-bottom: 2rem; padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-light);
        }
        .article-header h1 {
            font-size: 2.5rem; font-weight: 700; line-height: 1.25;
            color: var(--primary); margin-bottom: 1rem;
        }
        .article-meta {
            display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px;
            font-size: 0.9rem; color: var(--text-secondary);
        }
        .article-meta .tag {
            display: inline-block; padding: 4px 14px; border-radius: 20px;
            background: var(--bg-card); color: var(--primary);
            font-size: 0.85rem; font-weight: 500;
        }
        .article-meta .date { display: flex; align-items: center; gap: 6px; }
        .article-meta .date i { color: var(--accent); }
        @media (max-width: 768px) {
            .article-header h1 { font-size: 1.75rem; }
        }

        /* Article Content */
        .article-content {
            font-size: 1.05rem; line-height: 1.8; color: var(--text-primary);
        }
        .article-content p { margin-bottom: 1.25rem; }
        .article-content h2, .article-content h3, .article-content h4 {
            margin-top: 2rem; margin-bottom: 0.75rem; color: var(--primary);
        }
        .article-content h2 { font-size: 1.6rem; }
        .article-content h3 { font-size: 1.3rem; }
        .article-content img {
            border-radius: var(--radius-lg); margin: 1.5rem auto;
            box-shadow: var(--shadow-md); max-width: 100%;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent); background: var(--bg-card);
            padding: 1rem 1.5rem; margin: 1.5rem 0; border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary); font-style: italic;
        }
        .article-content ul, .article-content ol {
            padding-left: 1.5rem; margin-bottom: 1.25rem;
        }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: 0.5rem; }
        .article-content a {
            color: var(--accent); text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover { color: var(--accent-glow); }
        .article-content code {
            background: var(--bg-card); padding: 2px 8px; border-radius: var(--radius-sm);
            font-size: 0.9em;
        }
        .article-content pre {
            background: var(--primary); color: #e8e8e8; padding: 1.25rem;
            border-radius: var(--radius-md); overflow-x: auto; font-size: 0.9rem;
            margin: 1.5rem 0;
        }

        /* Article Footer */
        .article-footer {
            display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
            margin-top: 2.5rem; padding-top: 1.5rem;
            border-top: 1px solid var(--border-light); gap: 16px;
        }
        .article-footer .share-label { font-size: 0.95rem; color: var(--text-secondary); }
        .share-buttons { display: flex; gap: 10px; }
        .share-btn {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; border-radius: 50%;
            background: var(--bg-card); color: var(--primary);
            font-size: 1.1rem; transition: var(--transition);
        }
        .share-btn:hover { background: var(--accent); color: var(--text-white); transform: translateY(-2px); }
        .back-link {
            display: inline-flex; align-items: center; gap: 8px;
            color: var(--primary); font-weight: 500;
        }
        .back-link:hover { color: var(--accent); }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-white); padding: 3rem 0;
            border-top: 1px solid var(--border-light);
        }
        .related-section h2 {
            font-size: 1.8rem; font-weight: 600; color: var(--primary);
            margin-bottom: 1.5rem; text-align: center;
        }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: var(--bg-white); border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm); overflow: hidden;
            transition: var(--transition); border: 1px solid var(--border-light);
        }
        .related-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .related-card .card-img {
            aspect-ratio: 16/9; overflow: hidden; background: var(--bg-card);
        }
        .related-card .card-img img {
            width: 100%; height: 100%; object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 16px 20px 20px; }
        .related-card .card-body h3 {
            font-size: 1.1rem; font-weight: 600; color: var(--text-primary);
            margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2;
            -webkit-box-orient: vertical; overflow: hidden;
        }
        .related-card .card-body .date {
            font-size: 0.85rem; color: var(--text-light); display: flex; align-items: center; gap: 6px;
        }
        .related-card .card-body .date i { color: var(--accent); }
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section h2 { font-size: 1.4rem; }
        }

        /* ===== Not Found ===== */
        .not-found {
            text-align: center; padding: 3rem 0;
        }
        .not-found .icon { font-size: 4rem; color: var(--text-light); margin-bottom: 1rem; }
        .not-found h2 { font-size: 1.8rem; color: var(--primary); margin-bottom: 0.5rem; }
        .not-found p { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 1.5rem; }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-white); padding: 3rem 0;
        }
        .faq-section h2 {
            font-size: 1.8rem; font-weight: 600; color: var(--primary);
            text-align: center; margin-bottom: 2rem;
        }
        .faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-md);
            overflow: hidden; transition: var(--transition);
            border: 1px solid transparent;
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 16px 20px; font-size: 1.05rem; font-weight: 500;
            color: var(--text-primary); cursor: pointer; background: none; width: 100%;
            text-align: left; gap: 12px;
        }
        .faq-question i { color: var(--accent); transition: var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px; color: var(--text-secondary); font-size: 0.98rem; line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px; padding: 0 20px 18px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--gradient-primary); padding: 3.5rem 0;
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.06; pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 1; text-align: center; }
        .cta-section h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 0.5rem; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 1.8rem; }
        .cta-form { display: flex; gap: 12px; max-width: 520px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
        .cta-form input {
            flex: 1; min-width: 200px; padding: 14px 18px; border-radius: var(--radius-sm);
            border: none; font-size: 1rem; background: var(--bg-white);
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }
        .cta-form input:focus { outline: 2px solid var(--accent); }
        .cta-form .btn { flex-shrink: 0; }
        @media (max-width: 640px) {
            .cta-section h2 { font-size: 1.5rem; }
            .cta-form input { min-width: 100%; }
            .cta-form .btn { width: 100%; }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark); color: rgba(255,255,255,0.85);
            padding: 3.5rem 0 0; position: relative;
        }
        .footer::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0;
            height: 4px; background: var(--gradient-accent);
        }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px; padding-bottom: 2.5rem;
        }
        .footer-brand .logo { color: var(--text-white); margin-bottom: 12px; }
        .footer-brand .logo .logo-icon { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.6; max-width: 320px; margin-bottom: 16px; }
        .footer-social { display: flex; gap: 10px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 38px; height: 38px; border-radius: var(--radius-md);
            background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.7);
            font-size: 1rem; transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--text-white); transform: translateY(-2px); }
        .footer-col h4 {
            font-size: 1rem; font-weight: 600; color: var(--text-white);
            margin-bottom: 16px; letter-spacing: 0.5px;
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-contact li {
            display: flex; align-items: center; gap: 10px;
            font-size: 0.9rem; color: rgba(255,255,255,0.6);
        }
        .footer-contact i { width: 18px; color: var(--accent); font-size: 0.9rem; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 1.25rem 0; text-align: center;
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 640px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-brand p { max-width: 100%; }
        }

        /* ===== Responsive ===== */
        @media (max-width: 768px) {
            .article-main .article-container { padding: 0; }
            .article-content { font-size: 1rem; }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .fade-up { animation: fadeUp 0.6s ease forwards; }
        .fade-up-delay-1 { animation-delay: 0.1s; }
        .fade-up-delay-2 { animation-delay: 0.2s; }
        .fade-up-delay-3 { animation-delay: 0.3s; }

        /* Smooth image loading */
        img { background: var(--bg-card); }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #1A3C6E;
            --primary-dark: #0F2A4E;
            --primary-light: #2B59A0;
            --accent: #FF6F3C;
            --accent-light: #FF8C42;
            --accent-grad: linear-gradient(135deg, #FF6F3C 0%, #FF8C42 100%);
            --bg-card: #E8F0FE;
            --bg-warm: #FAFAF9;
            --bg-white: #FFFFFF;
            --text-dark: #2D2D2D;
            --text-mid: #666666;
            --text-light: #999999;
            --border-light: #E5E9F0;
            --success: #27AE60;
            --error: #E74C3C;
            --warning: #F39C12;
            --disabled: #B0BEC5;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 2px 8px rgba(26, 60, 110, 0.06);
            --shadow-md: 0 4px 12px rgba(26, 60, 110, 0.08);
            --shadow-lg: 0 8px 24px rgba(26, 60, 110, 0.15);
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            --container-max: 1280px;
            --header-height: 72px;
            --header-height-mobile: 56px;
            --transition: 0.25s ease;
        }

        /* ===== reset / base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.6;
            color: var(--text-dark);
            background: var(--bg-warm);
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 600;
            line-height: 1.3;
        }

        /* ===== container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 0 8px;
        }

        .nav-wrapper::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-dark);
            background: var(--bg-card);
            white-space: nowrap;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
        }

        .nav-tab:hover {
            background: #d4e2f7;
            transform: translateY(-1px);
        }

        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .nav-cta {
            margin-left: 12px;
            flex-shrink: 0;
        }

        .nav-cta .btn {
            padding: 9px 24px;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 20px;
        }

        /* 汉堡菜单按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: background var(--transition);
            flex-shrink: 0;
            border: none;
            padding: 0;
        }

        .hamburger:hover {
            background: #d4e2f7;
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .hamburger span+span {
            margin-top: 5px;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* 移动端下拉菜单 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            padding: 16px 20px;
            z-index: 999;
            flex-direction: column;
            gap: 10px;
        }

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

        .mobile-menu .nav-tab {
            display: block;
            padding: 12px 20px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            background: transparent;
            border: none;
        }

        .mobile-menu .nav-tab.active {
            background: var(--primary);
            color: #fff;
        }

        .mobile-menu .nav-cta {
            margin-left: 0;
            margin-top: 6px;
        }

        .mobile-menu .nav-cta .btn {
            display: block;
            text-align: center;
            padding: 12px 20px;
            border-radius: var(--radius-md);
        }

        @media (max-width: 768px) {
            .header {
                height: var(--header-height-mobile);
            }

            .nav-wrapper {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .mobile-menu {
                top: var(--header-height-mobile);
            }

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

            .logo-text {
                font-size: 1.15rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            min-height: 48px;
            border-radius: var(--radius-md);
            font-size: 1.125rem;
            font-weight: 600;
            line-height: 1.2;
            cursor: pointer;
            transition: filter var(--transition), transform var(--transition), box-shadow var(--transition);
            border: 2px solid transparent;
            text-align: center;
        }

        .btn:active {
            transform: scale(0.97);
        }

        .btn-primary {
            background: var(--accent-grad);
            color: #fff;
            border-color: transparent;
            box-shadow: 0 4px 14px rgba(255, 111, 60, 0.35);
        }

        .btn-primary:hover {
            filter: brightness(1.15);
            box-shadow: 0 6px 20px rgba(255, 111, 60, 0.45);
        }

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

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

        .btn-sm {
            padding: 8px 20px;
            min-height: 40px;
            font-size: 0.9rem;
        }

        .btn-lg {
            padding: 16px 36px;
            min-height: 56px;
            font-size: 1.2rem;
        }

        /* ===== hero ===== */
        .hero {
            margin-top: var(--header-height);
            background: radial-gradient(ellipse at 30% 40%, var(--primary-light) 0%, var(--primary) 50%, var(--primary-dark) 100%);
            min-height: 60vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding: 60px 0 80px;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg' opacity='0.08'%3E%3Cpath d='M40 100 C40 70 70 40 100 40 C130 40 160 70 160 100 C160 130 130 160 100 160 C70 160 40 130 40 100 Z' fill='none' stroke='%23ffffff' stroke-width='1.5'/%3E%3Cpath d='M60 100 C60 78 78 60 100 60 C122 60 140 78 140 100 C140 122 122 140 100 140 C78 140 60 122 60 100 Z' fill='none' stroke='%23ffffff' stroke-width='1' opacity='0.5'/%3E%3Ccircle cx='100' cy='100' r='6' fill='%23ffffff' opacity='0.2'/%3E%3C/svg%3E");
            background-size: 180px 180px;
            background-repeat: repeat;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .hero .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .hero .hero-badges {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 40px;
        }

        .hero .hero-badge {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            border-radius: var(--radius-lg);
            padding: 20px 28px;
            min-width: 140px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero .hero-badge .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent);
        }

        .hero .hero-badge .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.8);
            margin-top: 4px;
        }

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

        @media (max-width: 768px) {
            .hero {
                min-height: 50vh;
                padding: 40px 0 60px;
                margin-top: var(--header-height-mobile);
            }

            .hero h1 {
                font-size: 1.75rem;
            }

            .hero .hero-sub {
                font-size: 1rem;
            }

            .hero .hero-badges {
                gap: 16px;
            }

            .hero .hero-badge {
                padding: 14px 20px;
                min-width: 110px;
            }

            .hero .hero-badge .num {
                font-size: 1.4rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 4rem 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 2.5rem 0;
            }
        }

        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .section-title p {
            font-size: 1rem;
            color: var(--text-mid);
            max-width: 560px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section-title h2 {
                font-size: 1.5rem;
            }

            .section-title {
                margin-bottom: 2rem;
            }
        }

        .section-bg-light {
            background: var(--bg-white);
        }

        .section-bg-card {
            background: var(--bg-card);
        }

        /* ===== 产品线卡片 ===== */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .product-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 32px 28px 36px;
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
            text-align: center;
        }

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

        .product-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-card);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
        }

        .product-card h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .product-card p {
            font-size: 0.95rem;
            color: var(--text-mid);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .product-card .tag-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
        }

        .product-card .tag-list .tag {
            background: var(--bg-card);
            color: var(--primary);
            font-size: 0.8rem;
            padding: 4px 14px;
            border-radius: 20px;
            font-weight: 500;
        }

        @media (max-width: 1024px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .product-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .product-card {
                padding: 24px 20px 28px;
            }
        }

        /* ===== 适用场景 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .scene-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .scene-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .scene-item .icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .scene-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .scene-item p {
            font-size: 0.9rem;
            color: var(--text-mid);
        }

        @media (max-width: 1024px) {
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

        /* ===== 服务流程 ===== */
        .flow-steps {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            position: relative;
        }

        .flow-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent));
            border-radius: 2px;
            z-index: 0;
        }

        .flow-step {
            flex: 1;
            min-width: 160px;
            text-align: center;
            position: relative;
            z-index: 1;
            background: var(--bg-warm);
            padding: 0 8px;
        }

        .flow-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-grad);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 4px 12px rgba(255, 111, 60, 0.3);
        }

        .flow-step h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .flow-step p {
            font-size: 0.9rem;
            color: var(--text-mid);
        }

        @media (max-width: 768px) {
            .flow-steps {
                flex-direction: column;
                gap: 24px;
            }

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

            .flow-step {
                display: flex;
                align-items: center;
                gap: 16px;
                text-align: left;
                min-width: unset;
                background: transparent;
                padding: 0;
            }

            .flow-step .step-num {
                margin: 0;
                flex-shrink: 0;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* ===== 数据模块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 32px 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .stat-item .num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 0.95rem;
            color: var(--text-mid);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-item {
                padding: 24px 12px;
            }

            .stat-item .num {
                font-size: 1.5rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: var(--bg-white);
            transition: background var(--transition);
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            background: var(--bg-card);
        }

        .faq-question .arrow {
            font-size: 0.85rem;
            color: var(--text-mid);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .arrow {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-mid);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }

            .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.9rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: radial-gradient(ellipse at 50% 50%, var(--primary-light) 0%, var(--primary) 60%, var(--primary-dark) 100%);
            padding: 4rem 0;
            text-align: center;
            position: relative;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
        }

        .cta-section .btn {
            font-size: 1.1rem;
            padding: 16px 40px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 2.5rem 0;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section p {
                font-size: 1rem;
            }
        }

        /* ===== 图文介绍 ===== */
        .intro-block {
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .intro-block .intro-image {
            flex: 0 0 48%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .intro-block .intro-image img {
            width: 100%;
            height: auto;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }

        .intro-block .intro-text {
            flex: 1;
        }

        .intro-block .intro-text h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .intro-block .intro-text p {
            font-size: 1rem;
            color: var(--text-mid);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .intro-block .intro-text .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 20px;
            margin-top: 16px;
        }

        .intro-block .intro-text .intro-features li {
            font-size: 0.95rem;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .intro-block .intro-text .intro-features li i {
            color: var(--accent);
            font-size: 0.85rem;
        }

        @media (max-width: 900px) {
            .intro-block {
                flex-direction: column;
                gap: 28px;
            }

            .intro-block .intro-image {
                flex: 0 0 100%;
                width: 100%;
            }

            .intro-block .intro-text .intro-features {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 0;
        }

        .footer a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .footer-brand .logo .logo-icon {
            color: #fff;
        }

        .footer-brand .logo .logo-text {
            color: #fff;
            font-size: 1.2rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 16px;
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.7);
            transition: background var(--transition), color var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }

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

        .footer-bottom {
            text-align: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .footer {
                padding: 32px 0 0;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }

        .mt-2 {
            margin-top: 2rem;
        }

        .mt-3 {
            margin-top: 3rem;
        }

        .mb-2 {
            margin-bottom: 2rem;
        }

        /* ===== 图片自适应占位 ===== */
        .img-placeholder {
            background: var(--bg-card);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 0.9rem;
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 16px 0 0;
            font-size: 0.85rem;
            color: var(--text-light);
        }

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

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

        .breadcrumb span {
            color: var(--primary);
            font-weight: 500;
        }

        .breadcrumb .sep {
            margin: 0 8px;
            color: var(--text-light);
        }

        @media (max-width: 768px) {
            .breadcrumb {
                padding: 12px 0 0;
                font-size: 0.8rem;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1A3C6E;
            --primary-dark: #0F2A4A;
            --primary-light: #2B59A0;
            --accent: #FF6F3C;
            --accent-light: #FF8C42;
            --accent-glow: #FF6F3C33;
            --bg-light: #E8F0FE;
            --bg-warm: #FAFAF9;
            --text-dark: #2D2D2D;
            --text-mid: #666666;
            --text-light: #999999;
            --white: #FFFFFF;
            --success: #27AE60;
            --error: #E74C3C;
            --warning: #F39C12;
            --disabled: #B0BEC5;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-sm: 4px;
            --shadow-card: 0 4px 12px rgba(26,60,110,0.08);
            --shadow-hover: 0 8px 24px rgba(26,60,110,0.15);
            --transition: 0.25s ease;
            --max-width: 1280px;
            --nav-height: 72px;
            --nav-height-mobile: 56px;
            --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            color: var(--text-dark);
            background-color: var(--bg-warm);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 600; }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (max-width: 767px) {
            .container { padding: 0 16px; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            min-height: 48px; padding: 12px 28px; border-radius: var(--radius-btn);
            font-size: 1.125rem; font-weight: 600; line-height: 1; white-space: nowrap;
            cursor: pointer; transition: all var(--transition); border: none;
            text-decoration: none; user-select: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--white); box-shadow: 0 4px 14px var(--accent-glow);
        }
        .btn-primary:hover { filter: brightness(1.15); transform: translateY(-2px); box-shadow: 0 6px 20px var(--accent-glow); }
        .btn-primary:active { transform: scale(0.97); filter: brightness(0.95); }
        .btn-secondary {
            background: transparent; color: var(--primary); border: 2px solid var(--primary);
        }
        .btn-secondary:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
        .btn-sm { min-height: 40px; padding: 8px 20px; font-size: 0.95rem; }
        .btn-outline-light {
            background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.6);
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: var(--white); }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 20px;
            font-size: 0.875rem; font-weight: 500; line-height: 1.4;
            background: var(--bg-light); color: var(--primary);
        }
        .badge-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--white);
        }
        .badge-number {
            display: inline-flex; align-items: center; gap: 6px;
            font-size: 1.125rem; font-weight: 700; color: var(--accent);
        }

        /* ===== Card ===== */
        .card {
            background: var(--white); border-radius: var(--radius-card);
            box-shadow: var(--shadow-card); transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .card-body { padding: 24px; }
        @media (max-width: 767px) { .card-body { padding: 16px; } }

        /* ===== Section Spacing ===== */
        .section { padding: 4rem 0; }
        .section-title {
            text-align: center; margin-bottom: 3rem;
        }
        .section-title h2 {
            font-size: 2rem; font-weight: 700; color: var(--primary);
            margin-bottom: 0.75rem;
        }
        .section-title p {
            color: var(--text-mid); max-width: 640px; margin: 0 auto;
            font-size: 1rem;
        }
        @media (max-width: 767px) {
            .section { padding: 2.5rem 0; }
            .section-title h2 { font-size: 1.5rem; }
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: var(--white); border-bottom: 1px solid rgba(0,0,0,0.06);
            height: var(--nav-height); display: flex; align-items: center;
        }
        .header .container {
            display: flex; align-items: center; justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--primary); font-weight: 700;
        }
        .logo-icon { width: 36px; height: 36px; color: var(--accent); flex-shrink: 0; }
        .logo-text { font-size: 1.35rem; letter-spacing: 0.02em; }
        .nav-wrapper {
            display: flex; align-items: center; gap: 6px;
            background: var(--bg-light); border-radius: 40px; padding: 4px 6px;
        }
        .nav-tab {
            padding: 8px 18px; border-radius: 30px; font-size: 0.95rem; font-weight: 500;
            color: var(--text-dark); transition: all var(--transition); white-space: nowrap;
            text-decoration: none;
        }
        .nav-tab:hover { background: rgba(26,60,110,0.08); color: var(--primary); }
        .nav-tab.active {
            background: var(--primary); color: var(--white); box-shadow: 0 2px 8px rgba(26,60,110,0.25);
        }
        .nav-cta { margin-left: 8px; }
        .nav-cta .btn { min-height: 40px; padding: 8px 22px; font-size: 0.95rem; }

        /* Hamburger */
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
        .hamburger span { display: block; width: 26px; height: 3px; background: var(--primary); border-radius: 4px; transition: all var(--transition); }
        .mobile-menu {
            display: none; position: fixed; top: var(--nav-height); left: 0; width: 100%;
            background: var(--white); padding: 16px 20px 24px; box-shadow: 0 12px 30px rgba(0,0,0,0.1);
            flex-direction: column; gap: 12px; z-index: 999;
        }
        .mobile-menu .nav-tab { display: block; padding: 12px 16px; border-radius: var(--radius-btn); }
        .mobile-menu .nav-cta { margin-left: 0; margin-top: 8px; }
        .mobile-menu.open { display: flex; }

        @media (max-width: 767px) {
            .header { height: var(--nav-height-mobile); }
            .nav-wrapper { display: none; }
            .hamburger { display: flex; }
            .logo-text { font-size: 1.15rem; }
            .logo-icon { width: 28px; height: 28px; }
        }

        /* ===== Hero (内页横幅) ===== */
        .page-hero {
            margin-top: var(--nav-height); padding: 5rem 0 4rem;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            position: relative; overflow: hidden;
        }
        .page-hero::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover; background-position: center; opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero .container { position: relative; z-index: 1; text-align: center; }
        .page-hero h1 {
            color: var(--white); font-size: 2.5rem; font-weight: 700; margin-bottom: 1rem;
        }
        .page-hero p {
            color: rgba(255,255,255,0.85); font-size: 1.125rem; max-width: 680px; margin: 0 auto 1.5rem;
        }
        .page-hero .badge { background: rgba(255,255,255,0.2); color: var(--white); }
        @media (max-width: 767px) {
            .page-hero { padding: 3rem 0 2.5rem; margin-top: var(--nav-height-mobile); }
            .page-hero h1 { font-size: 1.75rem; }
            .page-hero p { font-size: 1rem; }
        }

        /* ===== 品牌动态：时间线 / 历程 ===== */
        .timeline {
            position: relative; padding: 1rem 0;
        }
        .timeline::before {
            content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
            width: 3px; background: linear-gradient(to bottom, var(--accent), var(--primary-light));
            transform: translateX(-50%);
        }
        .timeline-item {
            display: flex; align-items: flex-start; gap: 2rem; margin-bottom: 2.5rem;
            position: relative;
        }
        .timeline-item:nth-child(odd) { flex-direction: row; }
        .timeline-item:nth-child(even) { flex-direction: row-reverse; }
        .timeline-dot {
            flex-shrink: 0; width: 20px; height: 20px; border-radius: 50%;
            background: var(--accent); border: 4px solid var(--white);
            box-shadow: 0 0 0 3px var(--accent), var(--shadow-card);
            position: relative; z-index: 2; margin-top: 6px;
        }
        .timeline-content {
            flex: 1; background: var(--white); padding: 20px 24px; border-radius: var(--radius-card);
            box-shadow: var(--shadow-card); max-width: 460px;
        }
        .timeline-content h4 { color: var(--primary); font-size: 1.1rem; margin-bottom: 4px; }
        .timeline-content .time { font-size: 0.875rem; color: var(--accent); font-weight: 600; }
        .timeline-content p { color: var(--text-mid); font-size: 0.95rem; margin-top: 6px; }
        @media (max-width: 767px) {
            .timeline::before { left: 20px; }
            .timeline-item, .timeline-item:nth-child(even) { flex-direction: row; gap: 1rem; }
            .timeline-dot { width: 16px; height: 16px; margin-top: 4px; flex-shrink: 0; }
            .timeline-content { max-width: 100%; padding: 16px; }
        }

        /* ===== 品牌特色卡片 ===== */
        .feature-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .feature-card {
            background: var(--white); border-radius: var(--radius-card); padding: 32px 24px;
            box-shadow: var(--shadow-card); text-align: center; transition: all var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-6px); }
        .feature-card i { font-size: 2.2rem; color: var(--accent); margin-bottom: 16px; }
        .feature-card h3 { font-size: 1.2rem; color: var(--primary); margin-bottom: 8px; }
        .feature-card p { color: var(--text-mid); font-size: 0.95rem; }
        @media (max-width: 1023px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 767px) { .feature-grid { grid-template-columns: 1fr; } }

        /* ===== 最新动态列表 (静态示例) ===== */
        .news-list { display: flex; flex-direction: column; gap: 20px; }
        .news-item {
            display: flex; gap: 24px; background: var(--white); border-radius: var(--radius-card);
            padding: 20px 24px; box-shadow: var(--shadow-card); transition: all var(--transition);
            align-items: center;
        }
        .news-item:hover { box-shadow: var(--shadow-hover); transform: translateX(6px); }
        .news-item .thumb {
            width: 140px; height: 96px; border-radius: 12px; object-fit: cover; flex-shrink: 0;
            background: var(--bg-light);
        }
        .news-item .info { flex: 1; }
        .news-item .info h4 { font-size: 1.05rem; color: var(--primary); margin-bottom: 4px; }
        .news-item .info p { color: var(--text-mid); font-size: 0.9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-item .meta { display: flex; gap: 16px; font-size: 0.85rem; color: var(--text-light); margin-top: 6px; }
        .news-item .meta .badge { font-size: 0.75rem; padding: 2px 10px; }
        @media (max-width: 767px) {
            .news-item { flex-direction: column; padding: 16px; }
            .news-item .thumb { width: 100%; height: 180px; }
        }

        /* ===== 数据徽章 ===== */
        .stats-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
        }
        .stat-card {
            background: var(--white); border-radius: var(--radius-card); padding: 28px 16px;
            text-align: center; box-shadow: var(--shadow-card); border-top: 4px solid var(--accent);
        }
        .stat-card .num { font-size: 2rem; font-weight: 700; color: var(--accent); }
        .stat-card .label { color: var(--text-mid); font-size: 0.9rem; margin-top: 4px; }
        @media (max-width: 1023px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 767px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--white); border-radius: var(--radius-card); box-shadow: var(--shadow-card);
            overflow: hidden; transition: all var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-hover); }
        .faq-question {
            display: flex; justify-content: space-between; align-items: center;
            padding: 18px 24px; cursor: pointer; font-weight: 600; color: var(--primary);
            font-size: 1rem; background: none; width: 100%; text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(26,60,110,0.04); }
        .faq-question i { transition: transform var(--transition); color: var(--accent); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px; color: var(--text-mid); font-size: 0.95rem; line-height: 1.6;
        }
        .faq-item.open .faq-answer {
            max-height: 300px; padding: 0 24px 18px;
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: 24px; padding: 3.5rem 2.5rem; text-align: center;
            position: relative; overflow: hidden;
        }
        .cta-block::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover; background-position: center; opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block .container { position: relative; z-index: 1; }
        .cta-block h2 { color: var(--white); font-size: 2rem; margin-bottom: 0.75rem; }
        .cta-block p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 1.5rem; font-size: 1.05rem; }
        .cta-block .btn { font-size: 1.1rem; }
        @media (max-width: 767px) {
            .cta-block { padding: 2.5rem 1.5rem; }
            .cta-block h2 { font-size: 1.5rem; }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary); color: rgba(255,255,255,0.85); padding: 3rem 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px;
            padding-bottom: 2rem; border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand .logo { color: var(--white); margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.7); max-width: 320px; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; border-radius: 10px; background: rgba(255,255,255,0.1);
            color: var(--white); font-size: 1.1rem; transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--white); transform: translateY(-3px); }
        .footer-col h4 { color: var(--white); font-size: 1rem; margin-bottom: 12px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.9rem; transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-contact li { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.7); font-size: 0.9rem; }
        .footer-contact li i { width: 16px; color: var(--accent); }
        .footer-bottom {
            padding: 1.5rem 0; text-align: center; font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        @media (max-width: 1023px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 767px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-brand p { max-width: 100%; }
        }

        /* ===== 内容区通用 ===== */
        .content-section {
            max-width: 860px; margin: 0 auto;
        }
        .content-section p {
            color: var(--text-mid); font-size: 1rem; line-height: 1.8; margin-bottom: 1rem;
        }
        .content-section h3 {
            font-size: 1.3rem; color: var(--primary); margin: 1.5rem 0 0.5rem;
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 767px) {
            .hide-mobile { display: none !important; }
        }
        @media (min-width: 768px) {
            .hide-desktop { display: none !important; }
        }

        /* ===== 图片占位样式 ===== */
        .img-placeholder {
            background: var(--bg-light); border-radius: var(--radius-card);
            display: flex; align-items: center; justify-content: center;
            color: var(--text-light); font-size: 0.9rem;
        }

        /* ===== 空状态 ===== */
        .empty-state { text-align: center; padding: 2.5rem 1rem; color: var(--text-mid); }
        .empty-state i { font-size: 2.5rem; color: var(--text-light); margin-bottom: 12px; display: block; }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex; align-items: center; gap: 8px; font-size: 0.9rem;
            color: var(--text-light); padding: 1rem 0 0;
        }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb span { color: var(--primary); font-weight: 500; }
        .breadcrumb i { font-size: 0.75rem; color: var(--text-light); }

        /* ===== 装饰 & 动画 ===== */
        .fade-up { opacity: 0; transform: translateY(30px); animation: fadeUp 0.6s ease forwards; }
        @keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }