/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --color-primary: #0a1931;
        --color-primary-light: #162a4a;
        --color-secondary: #004e89;
        --color-accent: #ff6b35;
        --color-accent-hover: #e55a2b;
        --color-bg: #f5f7fa;
        --color-bg-alt: #eef1f5;
        --color-white: #ffffff;
        --color-text: #1a1e2c;
        --color-text-soft: #4a5068;
        --color-text-light: #8a8fa8;
        --color-border: #dce0e8;
        --color-border-light: #e8ecf2;
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(10, 25, 49, 0.06);
        --shadow-md: 0 8px 24px rgba(10, 25, 49, 0.08);
        --shadow-lg: 0 16px 40px rgba(10, 25, 49, 0.12);
        --shadow-card: 0 4px 16px rgba(10, 25, 49, 0.06);
        --shadow-card-hover: 0 12px 32px rgba(10, 25, 49, 0.12);
        --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 4rem;
        --spacing-2xl: 6rem;
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --max-width: 1200px;
        --header-height: 72px;
    }

    /* ===== 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-sans);
        color: var(--color-text);
        background: var(--color-bg);
        line-height: 1.6;
        font-size: 1rem;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--color-secondary); text-decoration: none; transition: var(--transition); }
    a:hover, a:focus-visible { color: var(--color-accent); }
    a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: 4px; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: none; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--color-primary); font-weight: 700; }
    h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
    h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); margin-bottom: var(--spacing-lg); }
    h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 var(--spacing-lg);
    }
    @media (max-width: 768px) { .container { padding: 0 var(--spacing-md); } }

    /* ===== Section Spacing ===== */
    section { padding: var(--spacing-xl) 0; }
    .section-alt { background: var(--color-bg-alt); }

    /* ===== Header / Navigation (Card Panel Style) ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        background: rgba(255,255,255,0.85);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-border-light);
        height: var(--header-height);
        transition: var(--transition);
    }
    .site-header.scrolled { box-shadow: var(--shadow-md); background: rgba(255,255,255,0.96); }
    .header-inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 var(--spacing-lg);
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-lg);
    }
    @media (max-width: 768px) { .header-inner { padding: 0 var(--spacing-md); } }

    /* Logo */
    .logo {
        font-size: 1.35rem;
        font-weight: 800;
        color: var(--color-primary);
        letter-spacing: -0.02em;
        white-space: nowrap;
        display: flex;
        align-items: center;
        gap: 0.4rem;
    }
    .logo i { color: var(--color-accent); font-size: 1.2rem; }
    .logo span { color: var(--color-accent); }

    /* Nav Card Panel */
    .nav-panel {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        background: var(--color-white);
        padding: 0.35rem 0.35rem 0.35rem 0.8rem;
        border-radius: 50px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border-light);
        transition: var(--transition);
    }
    .nav-panel:hover { box-shadow: var(--shadow-md); }
    .nav-panel a {
        display: flex;
        align-items: center;
        gap: 0.35rem;
        padding: 0.45rem 1rem;
        border-radius: 50px;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--color-text-soft);
        transition: var(--transition);
        white-space: nowrap;
    }
    .nav-panel a i { font-size: 0.85rem; }
    .nav-panel a:hover, .nav-panel a:focus-visible {
        background: var(--color-bg-alt);
        color: var(--color-primary);
    }
    .nav-panel a.active {
        background: var(--color-primary);
        color: var(--color-white);
        box-shadow: 0 2px 12px rgba(10, 25, 49, 0.2);
    }
    .nav-panel a.active:hover { background: var(--color-primary-light); }

    /* Nav CTA */
    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.5rem 1.2rem;
        border-radius: 50px;
        background: var(--color-accent);
        color: var(--color-white);
        font-weight: 600;
        font-size: 0.85rem;
        transition: var(--transition);
        white-space: nowrap;
        border: none;
    }
    .nav-cta:hover { background: var(--color-accent-hover); color: var(--color-white); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(255,107,53,0.3); }
    .nav-cta i { font-size: 0.8rem; }

    /* Mobile toggle */
    .nav-toggle { display: none; font-size: 1.4rem; color: var(--color-primary); padding: 0.4rem; }

    @media (max-width: 768px) {
        .nav-panel {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: var(--spacing-md);
            right: var(--spacing-md);
            flex-direction: column;
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            padding: var(--spacing-sm);
            border: 1px solid var(--color-border);
            gap: 0.2rem;
            align-items: stretch;
        }
        .nav-panel.open { display: flex; }
        .nav-panel a { border-radius: var(--radius-sm); padding: 0.7rem 1rem; }
        .nav-panel a.active { background: var(--color-primary); color: var(--color-white); }
        .nav-toggle { display: block; }
        .nav-cta { display: none; }
        .nav-cta-mobile { display: inline-flex; justify-content: center; margin-top: 0.3rem; padding: 0.7rem 1rem; border-radius: var(--radius-sm); background: var(--color-accent); color: var(--color-white); font-weight: 600; font-size: 0.9rem; }
        .nav-cta-mobile:hover { background: var(--color-accent-hover); color: var(--color-white); }
    }
    @media (min-width: 769px) { .nav-cta-mobile { display: none; } }

    /* ===== Hero ===== */
    .hero {
        min-height: 88vh;
        display: flex;
        align-items: center;
        position: relative;
        background: linear-gradient(135deg, var(--color-primary) 0%, #0d2847 50%, #14365a 100%);
        overflow: hidden;
        padding-top: var(--header-height);
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-1.webp');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        opacity: 0.18;
        z-index: 0;
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 30% 50%, rgba(10,25,49,0.4) 0%, transparent 70%);
        z-index: 1;
    }
    .hero .container {
        position: relative;
        z-index: 2;
        width: 100%;
        padding-top: var(--spacing-xl);
        padding-bottom: var(--spacing-xl);
    }
    .hero-content {
        max-width: 780px;
        color: var(--color-white);
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        background: rgba(255,255,255,0.12);
        backdrop-filter: blur(4px);
        padding: 0.35rem 1rem 0.35rem 0.8rem;
        border-radius: 50px;
        font-size: 0.8rem;
        color: rgba(255,255,255,0.85);
        margin-bottom: var(--spacing-lg);
        border: 1px solid rgba(255,255,255,0.08);
    }
    .hero-badge i { color: var(--color-accent); font-size: 0.75rem; }
    .hero h1 {
        color: var(--color-white);
        font-size: clamp(2rem, 5vw, 3.4rem);
        font-weight: 800;
        letter-spacing: -0.02em;
        line-height: 1.15;
        margin-bottom: var(--spacing-md);
    }
    .hero h1 span { color: var(--color-accent); }
    .hero p {
        font-size: clamp(1rem, 1.5vw, 1.2rem);
        color: rgba(255,255,255,0.75);
        max-width: 600px;
        line-height: 1.7;
        margin-bottom: var(--spacing-lg);
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-md);
        align-items: center;
    }
    .btn-primary, .btn-secondary {
        display: inline-flex;
        align-items: center;
        gap: 0.6rem;
        padding: 0.75rem 2rem;
        border-radius: 50px;
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
        border: none;
        text-decoration: none;
    }
    .btn-primary {
        background: var(--color-accent);
        color: var(--color-white);
        box-shadow: 0 4px 16px rgba(255,107,53,0.3);
    }
    .btn-primary:hover { background: var(--color-accent-hover); color: var(--color-white); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255,107,53,0.4); }
    .btn-secondary {
        background: rgba(255,255,255,0.1);
        color: var(--color-white);
        backdrop-filter: blur(4px);
        border: 1px solid rgba(255,255,255,0.15);
    }
    .btn-secondary:hover { background: rgba(255,255,255,0.2); color: var(--color-white); transform: translateY(-2px); }
    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-lg);
        margin-top: var(--spacing-xl);
        padding-top: var(--spacing-lg);
        border-top: 1px solid rgba(255,255,255,0.08);
    }
    .hero-stat { text-align: center; }
    .hero-stat-num {
        font-size: 1.6rem;
        font-weight: 800;
        color: var(--color-white);
        line-height: 1;
    }
    .hero-stat-label {
        font-size: 0.8rem;
        color: rgba(255,255,255,0.55);
        margin-top: 0.25rem;
    }
    @media (max-width: 768px) {
        .hero { min-height: 70vh; }
        .hero-stats { gap: var(--spacing-md); justify-content: center; }
        .hero-stat { flex: 1 0 40%; }
        .hero-actions { flex-direction: column; align-items: stretch; }
        .hero-actions .btn-primary, .hero-actions .btn-secondary { justify-content: center; }
    }

    /* ===== Services / Core Features ===== */
    .services-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    @media (max-width: 768px) { .services-grid { grid-template-columns: 1fr; gap: var(--spacing-md); } }
    @media (min-width: 769px) and (max-width: 1024px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }

    .service-card {
        background: var(--color-white);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: var(--transition);
        border: 1px solid var(--color-border-light);
        display: flex;
        flex-direction: column;
    }
    .service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
    .service-card-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        display: block;
    }
    .service-card-body { padding: var(--spacing-lg); flex: 1; display: flex; flex-direction: column; }
    .service-card-body h3 { margin-bottom: var(--spacing-sm); }
    .service-card-body p { color: var(--color-text-soft); font-size: 0.95rem; line-height: 1.6; flex: 1; }
    .service-card-tag {
        display: inline-block;
        margin-top: var(--spacing-md);
        padding: 0.2rem 0.8rem;
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 600;
        background: var(--color-bg-alt);
        color: var(--color-secondary);
        align-self: flex-start;
    }

    /* ===== Latest Posts (CMS) ===== */
    .posts-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    @media (max-width: 768px) { .posts-grid { grid-template-columns: 1fr; gap: var(--spacing-md); } }

    .post-card {
        background: var(--color-white);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        border: 1px solid var(--color-border-light);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-card-hover); }
    .post-card-img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        display: block;
    }
    .post-card-body { padding: var(--spacing-lg); flex: 1; display: flex; flex-direction: column; }
    .post-card-meta {
        display: flex;
        align-items: center;
        gap: 0.8rem;
        font-size: 0.8rem;
        color: var(--color-text-light);
        margin-bottom: var(--spacing-sm);
    }
    .post-card-meta .cat-badge {
        padding: 0.15rem 0.6rem;
        border-radius: 50px;
        background: var(--color-bg-alt);
        color: var(--color-secondary);
        font-weight: 600;
        font-size: 0.7rem;
    }
    .post-card-body h3 a { color: var(--color-primary); font-size: 1.1rem; font-weight: 700; line-height: 1.35; }
    .post-card-body h3 a:hover { color: var(--color-accent); }
    .post-card-body p { color: var(--color-text-soft); font-size: 0.9rem; margin-top: var(--spacing-sm); flex: 1; }
    .post-card-foot {
        margin-top: var(--spacing-md);
        padding-top: var(--spacing-sm);
        border-top: 1px solid var(--color-border-light);
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 0.8rem;
        color: var(--color-text-light);
    }
    .post-card-foot a { color: var(--color-secondary); font-weight: 500; }
    .post-card-foot a:hover { color: var(--color-accent); }
    .posts-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: var(--spacing-xl) var(--spacing-lg);
        background: var(--color-white);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border-light);
        color: var(--color-text-soft);
        font-size: 1rem;
    }
    .posts-empty i { font-size: 2rem; color: var(--color-text-light); margin-bottom: var(--spacing-md); display: block; }

    /* ===== Features / Highlights ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
    }
    @media (max-width: 768px) { .features-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); } }
    @media (max-width: 480px) { .features-grid { grid-template-columns: 1fr; } }

    .feature-item {
        text-align: center;
        padding: var(--spacing-lg) var(--spacing-md);
        background: var(--color-white);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border-light);
        transition: var(--transition);
    }
    .feature-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
    .feature-icon {
        width: 56px;
        height: 56px;
        margin: 0 auto var(--spacing-md);
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-md);
        background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
        color: var(--color-white);
        font-size: 1.4rem;
    }
    .feature-item h4 { font-size: 1.05rem; margin-bottom: var(--spacing-xs); }
    .feature-item p { font-size: 0.88rem; color: var(--color-text-soft); line-height: 1.5; }

    /* ===== Stats / Numbers ===== */
    .stats-row {
        display: flex;
        justify-content: space-around;
        flex-wrap: wrap;
        gap: var(--spacing-lg);
        text-align: center;
    }
    .stats-row .stat-item { flex: 1 0 140px; }
    .stats-row .stat-num {
        font-size: 2.4rem;
        font-weight: 800;
        color: var(--color-primary);
        line-height: 1;
    }
    .stats-row .stat-num span { color: var(--color-accent); }
    .stats-row .stat-label { font-size: 0.9rem; color: var(--color-text-soft); margin-top: 0.3rem; }

    /* ===== Brand Showcase ===== */
    .brand-showcase {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-lg);
        align-items: center;
        justify-content: center;
        padding: var(--spacing-lg) 0;
    }
    .brand-showcase-item {
        padding: 0.8rem 1.6rem;
        background: var(--color-white);
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border-light);
        font-weight: 600;
        color: var(--color-text-soft);
        font-size: 0.9rem;
    }

    /* ===== FAQ ===== */
    .faq-list { max-width: 800px; margin: 0 auto; }
    .faq-item {
        background: var(--color-white);
        border-radius: var(--radius-md);
        margin-bottom: var(--spacing-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--color-border-light);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover { box-shadow: var(--shadow-md); }
    .faq-question {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--spacing-lg);
        font-weight: 600;
        font-size: 1rem;
        color: var(--color-primary);
        background: none;
        border: none;
        text-align: left;
        cursor: pointer;
        transition: var(--transition);
        gap: var(--spacing-md);
    }
    .faq-question:hover { color: var(--color-accent); }
    .faq-question i { font-size: 1rem; color: var(--color-text-light); transition: var(--transition); flex-shrink: 0; }
    .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--color-accent); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 var(--spacing-lg);
        color: var(--color-text-soft);
        font-size: 0.95rem;
        line-height: 1.7;
    }
    .faq-item.active .faq-answer {
        max-height: 300px;
        padding: 0 var(--spacing-lg) var(--spacing-lg);
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--color-primary) 0%, #0d2847 50%, #1a3a5c 100%);
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        opacity: 0.06;
    }
    .cta-section .container { position: relative; z-index: 1; text-align: center; }
    .cta-section h2 { color: var(--color-white); margin-bottom: var(--spacing-md); }
    .cta-section p { color: rgba(255,255,255,0.7); font-size: 1.05rem; max-width: 600px; margin: 0 auto var(--spacing-lg); }
    .cta-section .btn-primary { font-size: 1.05rem; padding: 0.85rem 2.4rem; }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--color-primary);
        color: rgba(255,255,255,0.55);
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }
    @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); } }
    .footer-brand .logo { color: var(--color-white); margin-bottom: var(--spacing-sm); }
    .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
    .footer-col h4 { color: var(--color-white); font-size: 1rem; margin-bottom: var(--spacing-md); }
    .footer-col a {
        display: block;
        color: rgba(255,255,255,0.55);
        font-size: 0.9rem;
        padding: 0.25rem 0;
        transition: var(--transition);
    }
    .footer-col a:hover { color: var(--color-accent); padding-left: 4px; }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: var(--spacing-lg);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: var(--spacing-md);
        font-size: 0.82rem;
    }
    .footer-bottom a { color: rgba(255,255,255,0.45); }
    .footer-bottom a:hover { color: var(--color-accent); }

    /* ===== Back to Top ===== */
    .back-top {
        position: fixed;
        bottom: 2rem;
        right: 2rem;
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: var(--color-primary);
        color: var(--color-white);
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: var(--shadow-md);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transform: translateY(12px);
        transition: var(--transition);
        border: none;
        font-size: 1rem;
    }
    .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
    .back-top:hover { background: var(--color-accent); transform: translateY(-3px); box-shadow: 0 8px 24px rgba(255,107,53,0.35); }

    /* ===== Responsive helpers ===== */
    @media (max-width: 480px) {
        .hero h1 { font-size: 1.8rem; }
        .hero p { font-size: 0.95rem; }
        .service-card-img { height: 150px; }
        .post-card-img { height: 140px; }
        .stats-row .stat-num { font-size: 1.8rem; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    /* ===== Section Divider ===== */
    .section-divider { width: 60px; height: 3px; background: var(--color-accent); border-radius: 4px; margin-bottom: var(--spacing-lg); }
    .text-center .section-divider { margin-left: auto; margin-right: auto; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0f1f3d;
            --color-primary-light: #1a2f5a;
            --color-accent: #d4a530;
            --color-accent-light: #f0c850;
            --color-accent-dark: #b89128;
            --color-secondary: #2d6cb4;
            --color-secondary-light: #4a8cd4;
            --color-bg: #f4f6fa;
            --color-white: #ffffff;
            --color-text: #1a1a2e;
            --color-text-soft: #4a4a6a;
            --color-text-light: #7a7a9a;
            --color-border: #e2e6ef;
            --color-shadow: rgba(15, 31, 61, 0.08);
            --color-shadow-hover: rgba(15, 31, 61, 0.18);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 8px var(--color-shadow);
            --shadow-md: 0 6px 24px var(--color-shadow);
            --shadow-lg: 0 16px 48px var(--color-shadow-hover);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover,
        a:focus-visible {
            color: var(--color-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-primary);
        }

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

        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 31, 61, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(15, 31, 61, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-white);
            letter-spacing: -0.3px;
            transition: var(--transition);
        }

        .logo i {
            color: var(--color-accent);
            font-size: 26px;
        }

        .logo span {
            color: var(--color-accent);
        }

        .logo:hover {
            opacity: 0.9;
            color: var(--color-white);
        }

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

        .nav-panel a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-panel a i {
            font-size: 15px;
        }

        .nav-panel a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-panel a.active {
            color: var(--color-white);
            background: rgba(212, 165, 48, 0.2);
            box-shadow: inset 0 -2px 0 var(--color-accent);
        }

        .nav-panel a.active i {
            color: var(--color-accent);
        }

        .nav-cta {
            padding: 10px 26px;
            border-radius: var(--radius-xl);
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            color: var(--color-primary);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(212, 165, 48, 0.3);
            border: none;
            white-space: nowrap;
        }

        .nav-cta i {
            font-size: 13px;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 165, 48, 0.4);
            color: var(--color-primary);
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-cta-mobile {
            display: none !important;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--color-white);
            font-size: 22px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.88) 0%, rgba(15, 31, 61, 0.72) 50%, rgba(15, 31, 61, 0.88) 100%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--color-bg), transparent);
            z-index: 2;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 800px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            background: rgba(212, 165, 48, 0.15);
            border: 1px solid rgba(212, 165, 48, 0.3);
            border-radius: var(--radius-xl);
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-badge i {
            font-size: 14px;
        }

        .hero-title {
            font-size: clamp(2.4rem, 6vw, 4.2rem);
            font-weight: 900;
            color: var(--color-white);
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-title .highlight {
            color: var(--color-accent);
        }

        .hero-desc {
            font-size: clamp(1.05rem, 2vw, 1.3rem);
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            max-width: 660px;
            margin: 0 auto 36px;
        }

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

        .btn-primary {
            padding: 14px 36px;
            border-radius: var(--radius-xl);
            background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
            color: var(--color-primary);
            font-weight: 700;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(212, 165, 48, 0.3);
            border: none;
        }

        .btn-primary i {
            font-size: 15px;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(212, 165, 48, 0.4);
            color: var(--color-primary);
        }

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

        .btn-outline {
            padding: 14px 36px;
            border-radius: var(--radius-xl);
            background: transparent;
            color: var(--color-white);
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }

        .btn-outline i {
            font-size: 15px;
        }

        .btn-outline:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(212, 165, 48, 0.08);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--color-white);
        }

        .section-dark {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.85);
        }

        .section-dark .section-title,
        .section-dark .section-subtitle {
            color: var(--color-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            background: rgba(212, 165, 48, 0.1);
            border-radius: var(--radius-xl);
            color: var(--color-accent-dark);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--color-text-soft);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== 核心优势卡片 ===== */
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

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

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .advantage-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--color-border);
            text-align: center;
        }

        .advantage-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(212, 165, 48, 0.2);
        }

        .advantage-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(212, 165, 48, 0.12), rgba(212, 165, 48, 0.04));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 28px;
            color: var(--color-accent-dark);
            transition: var(--transition);
        }

        .advantage-card:hover .advantage-icon {
            background: linear-gradient(135deg, rgba(212, 165, 48, 0.2), rgba(212, 165, 48, 0.08));
            transform: scale(1.05);
        }

        .advantage-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-primary);
        }

        .advantage-card p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        /* ===== 场景区块 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .scene-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--color-border);
        }

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

        .scene-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .scene-img .scene-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 16px 20px;
            background: linear-gradient(to top, rgba(15, 31, 61, 0.8), transparent);
            color: var(--color-white);
            font-weight: 700;
            font-size: 18px;
        }

        .scene-body {
            padding: 20px 24px 24px;
        }

        .scene-body h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-primary);
        }

        .scene-body p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.6;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(to right, var(--color-accent), var(--color-secondary-light), var(--color-accent));
            opacity: 0.3;
        }

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

        .step-number {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 28px;
            font-weight: 800;
            color: var(--color-accent);
            box-shadow: 0 4px 16px rgba(15, 31, 61, 0.2);
            border: 3px solid rgba(212, 165, 48, 0.2);
            transition: var(--transition);
        }

        .step-item:hover .step-number {
            transform: scale(1.06);
            border-color: var(--color-accent);
        }

        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-primary);
        }

        .step-item p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.6;
            max-width: 200px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(212, 165, 48, 0.2);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            background: transparent;
            text-align: left;
            cursor: pointer;
            gap: 12px;
        }

        .faq-question i {
            font-size: 14px;
            color: var(--color-accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--color-text-soft);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.9), rgba(15, 31, 61, 0.75));
            z-index: 1;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .cta-content .btn-primary {
            font-size: 17px;
            padding: 16px 44px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }

        .footer-col a i {
            width: 20px;
            color: var(--color-accent);
            margin-right: 6px;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
        }

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

        .footer-bottom a:hover {
            text-decoration: underline;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 24px;
            }
            .steps::before {
                display: none;
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 820px) {
            .nav-panel {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15, 31, 61, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 28px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 2px solid rgba(212, 165, 48, 0.2);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            }

            .nav-panel.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }

            .nav-panel a {
                width: 100%;
                padding: 14px 18px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .nav-panel a.nav-cta-mobile {
                display: flex !important;
                margin-top: 8px;
                background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
                color: var(--color-primary);
                font-weight: 700;
                justify-content: center;
            }

            .nav-panel a.nav-cta-mobile i {
                color: var(--color-primary);
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .hero-section {
                min-height: 60vh;
                padding: 100px 20px 60px;
            }
        }

        @media (max-width: 640px) {
            .grid-4,
            .grid-3,
            .grid-2,
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .section {
                padding: 56px 0;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
            .site-footer {
                padding: 36px 0 0;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .advantage-card {
                padding: 28px 20px 24px;
            }
            .scene-img {
                height: 160px;
            }
            .step-number {
                width: 64px;
                height: 64px;
                font-size: 22px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .cta-section {
                padding: 56px 0;
            }
            .hero-badge {
                font-size: 12px;
                padding: 4px 14px;
            }
        }

        @media (max-width: 420px) {
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--color-accent);
        }
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* 动画 */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-up {
            animation: fadeUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --color-primary: #0f2a44;
        --color-primary-dark: #091e30;
        --color-secondary: #d43f1f;
        --color-secondary-hover: #b83214;
        --color-accent: #e8b830;
        --color-accent-light: #f5d67a;
        --color-bg: #f4f6fa;
        --color-white: #ffffff;
        --color-text: #1e2a3a;
        --color-text-light: #5a6a7a;
        --color-border: #dce2ed;
        --color-success: #28a745;
        --color-shadow: rgba(15, 42, 68, 0.08);
        --color-shadow-hover: rgba(15, 42, 68, 0.16);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 22px;
        --radius-xl: 30px;
        --shadow-card: 0 4px 24px var(--color-shadow);
        --shadow-card-hover: 0 10px 40px var(--color-shadow-hover);
        --shadow-btn: 0 4px 14px rgba(212, 63, 31, 0.30);
        --shadow-btn-hover: 0 8px 28px rgba(212, 63, 31, 0.40);
        --transition: all 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        --container-max: 1200px;
        --nav-height: 72px;
        --section-pad: 80px;
        --section-pad-mobile: 48px;
        --grid-gap: 30px;
    }

    /* ===== 基础 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: 16px;
        line-height: 1.7;
        color: var(--color-text);
        background: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

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

    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-sm);
    }

    button,
    input,
    textarea {
        font-family: inherit;
        font-size: inherit;
        border: none;
        outline: none;
        transition: var(--transition);
    }

    button {
        cursor: pointer;
        background: none;
    }

    ul,
    ol {
        list-style: none;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        line-height: 1.25;
        font-weight: 700;
        color: var(--color-text);
    }

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

    /* ===== 导航 ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 2px 20px rgba(15, 42, 68, 0.06);
        height: var(--nav-height);
        display: flex;
        align-items: center;
    }

    .header-inner {
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 16px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.6rem;
        font-weight: 800;
        color: var(--color-primary);
        letter-spacing: -0.5px;
        white-space: nowrap;
        transition: var(--transition);
    }

    .logo i {
        color: var(--color-secondary);
        font-size: 1.7rem;
    }

    .logo span {
        color: var(--color-secondary);
    }

    .logo:hover {
        opacity: 0.85;
    }

    .nav-panel {
        display: flex;
        align-items: center;
        gap: 8px;
        background: var(--color-white);
        padding: 4px 6px;
        border-radius: var(--radius-xl);
        box-shadow: 0 2px 12px var(--color-shadow);
        border: 1px solid var(--color-border);
    }

    .nav-panel a {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 18px;
        border-radius: var(--radius-xl);
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--color-text-light);
        transition: var(--transition);
        white-space: nowrap;
    }

    .nav-panel a i {
        font-size: 0.9rem;
        color: var(--color-primary);
        opacity: 0.6;
    }

    .nav-panel a:hover {
        background: var(--color-bg);
        color: var(--color-primary);
    }

    .nav-panel a:hover i {
        opacity: 1;
    }

    .nav-panel a.active {
        background: var(--color-primary);
        color: var(--color-white);
        box-shadow: 0 4px 12px rgba(15, 42, 68, 0.20);
    }

    .nav-panel a.active i {
        color: var(--color-accent);
        opacity: 1;
    }

    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        background: var(--color-secondary);
        color: var(--color-white);
        padding: 10px 26px;
        border-radius: var(--radius-xl);
        font-weight: 600;
        font-size: 0.95rem;
        box-shadow: var(--shadow-btn);
        transition: var(--transition);
        border: none;
        cursor: pointer;
        white-space: nowrap;
    }

    .nav-cta i {
        font-size: 0.85rem;
    }

    .nav-cta:hover {
        background: var(--color-secondary-hover);
        box-shadow: var(--shadow-btn-hover);
        transform: translateY(-2px);
        color: var(--color-white);
    }

    .nav-cta:active {
        transform: translateY(0);
        box-shadow: var(--shadow-btn);
    }

    .nav-cta-mobile {
        display: none !important;
    }

    .nav-toggle {
        display: none;
        font-size: 1.6rem;
        color: var(--color-primary);
        padding: 6px 10px;
        border-radius: var(--radius-sm);
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        transition: var(--transition);
    }

    .nav-toggle:hover {
        background: var(--color-border);
    }

    /* ===== 文章 Banner ===== */
    .article-banner {
        position: relative;
        min-height: 340px;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        background: var(--color-primary-dark);
        background-image: url('/assets/images/backpic/back-1.webp');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        padding: 100px 24px 60px;
        overflow: hidden;
    }

    .article-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15, 42, 68, 0.88) 0%, rgba(15, 42, 68, 0.60) 100%);
        z-index: 1;
    }

    .article-banner .banner-content {
        position: relative;
        z-index: 2;
        max-width: 860px;
        width: 100%;
    }

    .article-banner .banner-tag {
        display: inline-block;
        background: var(--color-accent);
        color: var(--color-primary-dark);
        padding: 4px 18px;
        border-radius: var(--radius-xl);
        font-size: 0.85rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 20px;
        text-transform: uppercase;
        box-shadow: 0 2px 10px rgba(232, 184, 48, 0.30);
    }

    .article-banner h1 {
        font-size: 2.6rem;
        font-weight: 800;
        color: var(--color-white);
        line-height: 1.2;
        margin-bottom: 16px;
        text-shadow: 0 2px 20px rgba(0, 0, 0, 0.30);
    }

    .article-banner .banner-meta {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 24px;
        flex-wrap: wrap;
        color: rgba(255, 255, 255, 0.80);
        font-size: 0.95rem;
        font-weight: 400;
    }

    .article-banner .banner-meta i {
        margin-right: 6px;
        color: var(--color-accent);
    }

    .article-banner .banner-meta span {
        display: inline-flex;
        align-items: center;
    }

    /* ===== 文章正文区 ===== */
    .article-main {
        padding: 60px 0 80px;
    }

    .article-main .container {
        max-width: 840px;
    }

    .article-body {
        background: var(--color-white);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-card);
        padding: 48px 52px;
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--color-text);
    }

    .article-body p {
        margin-bottom: 1.4em;
    }

    .article-body h2,
    .article-body h3,
    .article-body h4 {
        margin-top: 1.8em;
        margin-bottom: 0.6em;
        color: var(--color-primary);
    }

    .article-body h2 {
        font-size: 1.7rem;
        border-left: 4px solid var(--color-secondary);
        padding-left: 16px;
    }

    .article-body h3 {
        font-size: 1.35rem;
    }

    .article-body ul,
    .article-body ol {
        margin-bottom: 1.4em;
        padding-left: 1.6em;
    }

    .article-body ul li {
        list-style: disc;
        margin-bottom: 0.4em;
    }

    .article-body ol li {
        list-style: decimal;
        margin-bottom: 0.4em;
    }

    .article-body img {
        margin: 1.6em 0;
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-card);
    }

    .article-body a {
        color: var(--color-secondary);
        border-bottom: 1px solid transparent;
    }

    .article-body a:hover {
        border-bottom-color: var(--color-secondary);
    }

    .article-body blockquote {
        border-left: 4px solid var(--color-accent);
        background: var(--color-bg);
        padding: 16px 24px;
        margin: 1.6em 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--color-text-light);
        font-style: italic;
    }

    .article-body code {
        background: var(--color-bg);
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 0.9em;
        color: var(--color-secondary);
    }

    .article-body pre {
        background: var(--color-primary-dark);
        color: #e8e8e8;
        padding: 20px 24px;
        border-radius: var(--radius-sm);
        overflow-x: auto;
        margin: 1.6em 0;
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .article-body pre code {
        background: none;
        color: inherit;
        padding: 0;
    }

    .article-body table {
        width: 100%;
        border-collapse: collapse;
        margin: 1.6em 0;
    }

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

    .article-body table th {
        background: var(--color-primary);
        color: var(--color-white);
        font-weight: 600;
    }

    .article-body table tr:nth-child(even) {
        background: var(--color-bg);
    }

    .article-not-found {
        text-align: center;
        padding: 80px 24px;
        background: var(--color-white);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-card);
    }

    .article-not-found i {
        font-size: 4rem;
        color: var(--color-text-light);
        opacity: 0.4;
        margin-bottom: 20px;
    }

    .article-not-found h2 {
        font-size: 1.8rem;
        color: var(--color-text);
        margin-bottom: 12px;
    }

    .article-not-found p {
        color: var(--color-text-light);
        margin-bottom: 24px;
    }

    .article-not-found .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        background: var(--color-primary);
        color: var(--color-white);
        padding: 12px 32px;
        border-radius: var(--radius-xl);
        font-weight: 600;
        transition: var(--transition);
    }

    .article-not-found .btn-back:hover {
        background: var(--color-primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(15, 42, 68, 0.25);
    }

    /* ===== 服务推荐区 ===== */
    .section-services {
        padding: var(--section-pad) 0;
        background: var(--color-white);
    }

    .section-title {
        text-align: center;
        font-size: 2.2rem;
        font-weight: 800;
        color: var(--color-primary);
        margin-bottom: 12px;
    }

    .section-subtitle {
        text-align: center;
        font-size: 1.1rem;
        color: var(--color-text-light);
        max-width: 640px;
        margin: 0 auto 48px;
        line-height: 1.6;
    }

    .service-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--grid-gap);
    }

    .service-card {
        background: var(--color-bg);
        border-radius: var(--radius-md);
        padding: 32px 28px;
        box-shadow: var(--shadow-card);
        transition: var(--transition);
        border: 1px solid var(--color-border);
        text-align: center;
    }

    .service-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-card-hover);
        border-color: var(--color-accent-light);
    }

    .service-card .card-icon {
        width: 64px;
        height: 64px;
        margin: 0 auto 18px;
        background: var(--color-primary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.8rem;
        color: var(--color-accent);
        box-shadow: 0 4px 12px rgba(15, 42, 68, 0.15);
    }

    .service-card h3 {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--color-primary);
        margin-bottom: 10px;
    }

    .service-card p {
        font-size: 0.95rem;
        color: var(--color-text-light);
        line-height: 1.6;
        margin-bottom: 16px;
    }

    .service-card .card-img {
        margin: 16px 0 0;
        border-radius: var(--radius-sm);
        overflow: hidden;
    }

    .service-card .card-img img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }

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

    .service-card .tag {
        display: inline-block;
        background: var(--color-accent-light);
        color: var(--color-primary-dark);
        padding: 2px 14px;
        border-radius: var(--radius-xl);
        font-size: 0.8rem;
        font-weight: 600;
        margin-bottom: 12px;
    }

    /* ===== CTA 区 ===== */
    .section-cta {
        padding: var(--section-pad) 0;
        background: var(--color-primary);
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        position: relative;
    }

    .section-cta::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(15, 42, 68, 0.82);
        z-index: 1;
    }

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

    .section-cta h2 {
        font-size: 2.2rem;
        font-weight: 800;
        color: var(--color-white);
        margin-bottom: 16px;
    }

    .section-cta p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.80);
        max-width: 600px;
        margin: 0 auto 32px;
        line-height: 1.6;
    }

    .btn-cta-primary {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        background: var(--color-secondary);
        color: var(--color-white);
        padding: 16px 44px;
        border-radius: var(--radius-xl);
        font-size: 1.1rem;
        font-weight: 700;
        box-shadow: var(--shadow-btn);
        transition: var(--transition);
        border: none;
        cursor: pointer;
    }

    .btn-cta-primary i {
        font-size: 1rem;
    }

    .btn-cta-primary:hover {
        background: var(--color-secondary-hover);
        box-shadow: var(--shadow-btn-hover);
        transform: translateY(-3px);
        color: var(--color-white);
    }

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

    /* ===== FAQ 区 ===== */
    .section-faq {
        padding: var(--section-pad) 0;
        background: var(--color-bg);
    }

    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

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

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

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 28px;
        font-weight: 600;
        font-size: 1.05rem;
        color: var(--color-text);
        cursor: pointer;
        transition: var(--transition);
        background: none;
        border: none;
        width: 100%;
        text-align: left;
        gap: 16px;
    }

    .faq-question i {
        color: var(--color-secondary);
        font-size: 1.2rem;
        transition: var(--transition);
        flex-shrink: 0;
    }

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

    .faq-question[aria-expanded="true"] i {
        transform: rotate(180deg);
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.40s ease, padding 0.30s ease;
        padding: 0 28px;
        color: var(--color-text-light);
        line-height: 1.7;
        font-size: 0.98rem;
    }

    .faq-answer.open {
        max-height: 400px;
        padding: 0 28px 24px;
    }

    .faq-answer p {
        margin-bottom: 0.8em;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--color-primary-dark);
        color: rgba(255, 255, 255, 0.80);
        padding: 60px 0 30px;
    }

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

    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr;
        gap: 48px;
        margin-bottom: 40px;
    }

    .footer-brand .logo {
        color: var(--color-white);
        margin-bottom: 16px;
        font-size: 1.5rem;
    }

    .footer-brand .logo span {
        color: var(--color-accent);
    }

    .footer-brand p {
        font-size: 0.95rem;
        line-height: 1.7;
        color: rgba(255, 255, 255, 0.65);
        max-width: 360px;
    }

    .footer-col h4 {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--color-white);
        margin-bottom: 18px;
        position: relative;
        padding-bottom: 10px;
    }

    .footer-col h4::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 36px;
        height: 3px;
        background: var(--color-accent);
        border-radius: 3px;
    }

    .footer-col a {
        display: block;
        color: rgba(255, 255, 255, 0.65);
        padding: 6px 0;
        font-size: 0.95rem;
        transition: var(--transition);
    }

    .footer-col a i {
        margin-right: 8px;
        color: var(--color-accent);
        width: 18px;
        text-align: center;
    }

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

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.10);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.50);
    }

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

    .footer-bottom a:hover {
        text-decoration: underline;
    }

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

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

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

        .article-banner h1 {
            font-size: 2.1rem;
        }

        .article-body {
            padding: 36px 32px;
        }

        :root {
            --section-pad: 60px;
        }
    }

    @media (max-width: 900px) {
        .nav-panel a {
            padding: 6px 14px;
            font-size: 0.88rem;
        }

        .nav-panel a i {
            font-size: 0.8rem;
        }

        .logo {
            font-size: 1.35rem;
        }

        .nav-cta {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
    }

    /* ===== 响应式：手机 ===== */
    @media (max-width: 768px) {
        .nav-panel {
            display: none;
            position: absolute;
            top: var(--nav-height);
            left: 12px;
            right: 12px;
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: 0 12px 48px rgba(15, 42, 68, 0.20);
            flex-direction: column;
            padding: 12px 8px;
            border: 1px solid var(--color-border);
            z-index: 999;
        }

        .nav-panel.open {
            display: flex;
        }

        .nav-panel a {
            width: 100%;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
        }

        .nav-panel a.active {
            background: var(--color-primary);
            color: var(--color-white);
        }

        .nav-cta {
            display: none;
        }

        .nav-cta-mobile {
            display: flex !important;
            background: var(--color-secondary) !important;
            color: var(--color-white) !important;
            padding: 12px 18px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            margin-top: 8px;
            justify-content: center;
        }

        .nav-cta-mobile i {
            color: var(--color-white) !important;
        }

        .nav-toggle {
            display: block;
        }

        .article-banner {
            min-height: 260px;
            padding: 80px 20px 40px;
        }

        .article-banner h1 {
            font-size: 1.6rem;
        }

        .article-banner .banner-meta {
            gap: 12px;
            font-size: 0.85rem;
            flex-direction: column;
        }

        .article-main {
            padding: 32px 0 48px;
        }

        .article-body {
            padding: 24px 18px;
            font-size: 1rem;
        }

        .article-body h2 {
            font-size: 1.35rem;
            padding-left: 12px;
        }

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

        .section-title {
            font-size: 1.7rem;
        }

        .section-subtitle {
            font-size: 1rem;
            margin-bottom: 32px;
        }

        .section-cta h2 {
            font-size: 1.7rem;
        }

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

        .btn-cta-primary {
            padding: 14px 32px;
            font-size: 1rem;
        }

        .faq-question {
            padding: 16px 20px;
            font-size: 0.98rem;
        }

        .faq-answer {
            padding: 0 20px;
        }

        .faq-answer.open {
            padding: 0 20px 18px;
        }

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

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

        :root {
            --section-pad: 40px;
            --section-pad-mobile: 32px;
        }
    }

    @media (max-width: 480px) {
        .article-banner h1 {
            font-size: 1.35rem;
        }

        .article-body {
            padding: 18px 14px;
            font-size: 0.95rem;
        }

        .article-body h2 {
            font-size: 1.2rem;
        }

        .logo {
            font-size: 1.15rem;
            gap: 6px;
        }

        .logo i {
            font-size: 1.3rem;
        }

        .header-inner {
            padding: 0 14px;
        }

        .service-card {
            padding: 24px 18px;
        }

        .section-cta h2 {
            font-size: 1.4rem;
        }

        .btn-cta-primary {
            padding: 12px 24px;
            font-size: 0.95rem;
        }
    }

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

    .mt-16 {
        margin-top: 16px;
    }

    .mb-16 {
        margin-bottom: 16px;
    }

    .gap-8 {
        gap: 8px;
    }

    .flex-center {
        display: flex;
        align-items: center;
        justify-content: center;
    }