/* roulang page: index */
:root {
        --primary: #2563EB;
        --primary-dark: #1D4ED8;
        --primary-light: #EFF4FF;
        --accent: #F59E0B;
        --accent-light: #FEF3C7;
        --bg: #F7F9FC;
        --card: #FFFFFF;
        --text: #1E293B;
        --text-secondary: #64748B;
        --text-muted: #94A3B8;
        --border: #E2E8F0;
        --success: #10B981;
        --warning: #EF4444;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-tag: 4px;
        --shadow: 0 1px 3px rgba(15,23,42,.06);
        --shadow-hover: 0 8px 24px rgba(37,99,235,.10);
        --shadow-nav: 0 2px 12px rgba(15,23,42,.06);
        --spacing: 64px;
        --container: 1200px;
        --transition: all .25s ease-out;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
        background: var(--bg);
        color: var(--text);
        font-size: 16px;
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    img { max-width: 100%; display: block; border-radius: var(--radius); }
    ul, ol { list-style: none; }
    .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
    .section { padding: var(--spacing) 0; }
    .section-header {
        display: flex; align-items: center; justify-content: space-between;
        margin-bottom: 36px; flex-wrap: wrap; gap: 16px;
    }
    .section-header h2 {
        font-size: 26px; line-height: 36px; font-weight: 700;
        display: flex; align-items: center; gap: 12px;
    }
    .section-header h2::before {
        content: ''; width: 4px; height: 22px; background: var(--primary);
        border-radius: 2px; display: inline-block;
    }
    .section-link { font-size: 14px; color: var(--text-secondary); display: inline-flex; align-items: center; gap: 6px; }
    .section-link i { transition: var(--transition); }
    .section-link:hover { color: var(--primary); }
    .section-link:hover i { transform: translateX(4px); }
    h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; }

    /* Header */
    .site-header {
        position: sticky; top: 0; z-index: 100;
        background: var(--card); border-bottom: 1px solid var(--border);
        height: 72px; transition: var(--transition);
    }
    .site-header.scrolled { box-shadow: var(--shadow-nav); }
    .header-inner {
        display: flex; align-items: center; justify-content: space-between;
        height: 72px; gap: 24px;
    }
    .logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
    .logo-icon {
        width: 36px; height: 36px; background: var(--primary-light);
        border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
        color: var(--primary); font-size: 18px;
    }
    .logo-text { font-size: 19px; font-weight: 700; color: var(--text); white-space: nowrap; }
    .logo-text b { font-weight: 800; color: var(--primary); }
    .main-nav { display: flex; align-items: center; gap: 6px; flex: 1; justify-content: center; }
    .main-nav a {
        display: inline-flex; align-items: center; gap: 6px;
        padding: 8px 14px; border-radius: var(--radius-sm);
        font-size: 15px; font-weight: 500; color: var(--text-secondary);
        position: relative; white-space: nowrap;
    }
    .main-nav a:hover { color: var(--primary); background: var(--primary-light); }
    .main-nav a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
    .main-nav a.active::after {
        content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%);
        width: 20px; height: 2px; background: var(--primary); border-radius: 2px;
    }
    .header-cta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .login-link { font-size: 14px; font-weight: 500; color: var(--text); padding: 8px 4px; }
    .login-link:hover { color: var(--primary); }
    .btn {
        display: inline-flex; align-items: center; justify-content: center; gap: 8px;
        padding: 10px 24px; border-radius: var(--radius-sm);
        font-size: 15px; font-weight: 600; line-height: 1.4;
        cursor: pointer; border: none; transition: var(--transition);
        outline: none;
    }
    .btn:focus-visible {
        box-shadow: 0 0 0 3px rgba(37,99,235,.15);
        border-color: var(--primary);
    }
    .btn-primary {
        background: var(--primary); color: #fff; box-shadow: 0 1px 2px rgba(37,99,235,.2);
    }
    .btn-primary:hover {
        background: var(--primary-dark); transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(37,99,235,.25);
    }
    .btn-primary:active { transform: translateY(0); }
    .btn-secondary {
        background: #fff; color: var(--text); border: 1px solid #CBD5E1;
    }
    .btn-secondary:hover {
        background: #F1F5F9; border-color: #94A3B8; transform: translateY(-1px);
    }
    .btn-white {
        background: #fff; color: var(--primary);
    }
    .btn-white:hover { background: #E0E7FF; transform: translateY(-1px); }
    .nav-toggle {
        display: none; background: none; border: none;
        font-size: 22px; color: var(--text); cursor: pointer; padding: 6px;
    }
    .mobile-menu {
        display: none; position: fixed; top: 72px; left: 0; right: 0; z-index: 99;
        background: var(--card); box-shadow: var(--shadow-nav);
        padding: 16px 0; border-bottom: 1px solid var(--border);
    }
    .mobile-menu.open { display: block; }
    .mobile-menu a {
        display: block; padding: 12px 24px; font-size: 16px; font-weight: 500;
        color: var(--text); border-left: 3px solid transparent;
    }
    .mobile-menu a:hover, .mobile-menu a.active {
        background: var(--primary-light); color: var(--primary); border-left-color: var(--primary);
    }
    .mobile-menu .btn { margin: 8px 16px 4px; width: calc(100% - 32px); }

    /* Hero */
    .hero {
        position: relative; background: linear-gradient(135deg, #F7F9FC 0%, #E0EAFD 55%, #DBEAFE 100%);
        overflow: hidden; padding: 80px 0 72px;
    }
    .hero::before {
        content: ''; position: absolute; top: -120px; right: -80px;
        width: 420px; height: 420px; border-radius: 50%;
        background: rgba(37,99,235,.06);
    }
    .hero::after {
        content: ''; position: absolute; bottom: -140px; left: -60px;
        width: 380px; height: 380px; border-radius: 50%;
        background: rgba(245,158,11,.06);
    }
    .hero-bg {
        position: absolute; inset: 0; z-index: 0; opacity: .18;
        background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    }
    .hero-inner {
        position: relative; z-index: 2;
        display: flex; align-items: center; gap: 56px;
        max-width: var(--container); margin: 0 auto; padding: 0 24px;
    }
    .hero-content { flex: 1; max-width: 640px; }
    .hero-status {
        display: inline-flex; align-items: center; gap: 8px;
        background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.2);
        padding: 5px 14px; border-radius: 999px;
        font-size: 13px; color: #047857; font-weight: 500;
        margin-bottom: 24px;
    }
    .hero-status .dot {
        width: 8px; height: 8px; background: var(--success); border-radius: 50%;
        animation: pulse 2s infinite;
    }
    @keyframes pulse {
        0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,.4); }
        50% { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
    }
    .hero h1 {
        font-size: 34px; line-height: 46px; font-weight: 800; color: var(--text);
        margin-bottom: 18px; letter-spacing: -0.01em;
    }
    .hero h1 span { color: var(--primary); }
    .hero-sub {
        font-size: 17px; line-height: 28px; color: var(--text-secondary);
        margin-bottom: 32px; max-width: 540px;
    }
    .hero-cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
    .hero-no-install {
        font-size: 13px; color: var(--text-muted);
        display: inline-flex; align-items: center; gap: 6px;
    }
    .hero-trust {
        display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
        padding-top: 24px; border-top: 1px solid rgba(226,232,240,.7);
    }
    .hero-trust-item {
        display: flex; align-items: center; gap: 8px;
        font-size: 13px; color: var(--text-secondary);
    }
    .hero-trust-item i { color: var(--primary); font-size: 15px; }
    .hero-visual { flex: 1; max-width: 460px; position: relative; }
    .hero-visual img {
        border-radius: var(--radius); box-shadow: 0 16px 48px rgba(37,99,235,.15);
        width: 100%; height: auto; object-fit: cover; aspect-ratio: 16/10;
    }
    .hero-badge {
        position: absolute; bottom: 18px; left: -24px;
        background: var(--card); border-radius: var(--radius-sm);
        padding: 8px 16px; box-shadow: var(--shadow-hover);
        display: flex; align-items: center; gap: 8px;
        font-size: 13px; font-weight: 500;
    }
    .hero-badge i { color: var(--accent); font-size: 16px; }

    /* Feature Cards */
    .features-grid {
        display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
    }
    .feature-card {
        background: var(--card); border: 1px solid var(--border);
        border-radius: var(--radius); box-shadow: var(--shadow);
        padding: 24px; transition: var(--transition);
        position: relative; overflow: hidden;
    }
    .feature-card:hover {
        box-shadow: var(--shadow-hover); transform: translateY(-2px);
        background: #F8FAFF;
    }
    .feature-icon {
        width: 44px; height: 44px; background: var(--primary-light);
        border-radius: 50%; display: flex; align-items: center; justify-content: center;
        color: var(--primary); font-size: 18px; margin-bottom: 16px;
    }
    .feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
    .feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 22px; }
    .feature-link {
        display: inline-flex; align-items: center; gap: 4px;
        font-size: 13px; font-weight: 500; color: var(--primary);
        margin-top: 14px; opacity: 0; transform: translateX(-6px);
        transition: var(--transition);
    }
    .feature-card:hover .feature-link { opacity: 1; transform: translateX(0); }
    .feature-card.feature-card-wide {
        grid-column: span 2;
        display: flex; align-items: center; justify-content: space-between; gap: 24px;
    }
    .feature-card-wide .feature-card-content { flex: 1; }
    .feature-card-wide img { width: 220px; height: 140px; object-fit: cover; border-radius: var(--radius-sm); }

    /* Trust bar */
    .trust-bar {
        background: linear-gradient(90deg, var(--primary) 0%, #1D4ED8 100%);
        padding: 28px 0; margin-top: -1px;
    }
    .trust-bar-inner {
        display: flex; align-items: center; justify-content: space-between;
        gap: 24px; flex-wrap: wrap;
    }
    .trust-item {
        display: flex; align-items: center; gap: 14px; color: #fff; flex: 1; min-width: 200px;
    }
    .trust-item i {
        font-size: 26px; color: rgba(255,255,255,.85);
        width: 48px; height: 48px; border-radius: 50%;
        background: rgba(255,255,255,.12);
        display: flex; align-items: center; justify-content: center;
    }
    .trust-item h4 { font-size: 15px; font-weight: 600; color: #fff; }
    .trust-item p { font-size: 13px; color: rgba(255,255,255,.75); }

    /* Timeline */
    .timeline-section { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
    .timeline-grid {
        display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
        align-items: start;
    }
    .timeline-list { position: relative; padding-left: 28px; }
    .timeline-list::before {
        content: ''; position: absolute; left: 8px; top: 6px; bottom: 6px;
        width: 2px; background: linear-gradient(to bottom, var(--primary), var(--border));
        border-radius: 2px;
    }
    .timeline-item {
        position: relative; padding: 0 0 36px 20px;
    }
    .timeline-item:last-child { padding-bottom: 0; }
    .timeline-item::before {
        content: ''; position: absolute; left: -26px; top: 6px;
        width: 12px; height: 12px; border-radius: 50%;
        background: var(--primary); border: 3px solid #fff;
        box-shadow: 0 0 0 2px var(--primary);
    }
    .timeline-item .date {
        font-size: 13px; color: var(--text-muted); font-weight: 500;
    }
    .timeline-item h4 { font-size: 15px; font-weight: 600; margin: 4px 0 6px; }
    .timeline-item p { font-size: 14px; color: var(--text-secondary); line-height: 22px; }
    .status-panel {
        background: var(--bg); border: 1px solid var(--border);
        border-radius: var(--radius); padding: 24px;
    }
    .status-panel h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; }
    .status-item {
        display: flex; align-items: center; justify-content: space-between;
        padding: 12px 0; border-bottom: 1px solid var(--border);
        font-size: 14px;
    }
    .status-item:last-child { border-bottom: none; }
    .status-label { display: flex; align-items: center; gap: 10px; color: var(--text-secondary); }
    .status-value { display: flex; align-items: center; gap: 6px; font-weight: 500; font-size: 13px; }
    .status-value .ok { color: var(--success); }
    .status-value .checking { color: var(--accent); }

    /* News */
    .news-section { background: var(--bg); }
    .news-grid {
        display: grid; grid-template-columns: 3fr 2fr; gap: 24px;
    }
    .news-main {
        background: var(--card); border: 1px solid var(--border);
        border-radius: var(--radius); box-shadow: var(--shadow);
        overflow: hidden; transition: var(--transition);
        display: block;
    }
    .news-main:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
    .news-main img {
        width: 100%; height: 220px; object-fit: cover;
        border-radius: var(--radius) var(--radius) 0 0;
    }
    .news-main-body { padding: 20px 24px 24px; }
    .tag {
        display: inline-block; background: var(--primary-light); color: var(--primary);
        font-size: 12px; padding: 2px 10px; border-radius: var(--radius-tag);
        font-weight: 500; margin-bottom: 10px;
    }
    .news-main-body h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; color: var(--text); }
    .news-main-body h3:hover { color: var(--primary); }
    .news-main-body p {
        font-size: 14px; color: var(--text-secondary); line-height: 24px;
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
        overflow: hidden; margin-bottom: 12px;
    }
    .time { font-size: 13px; color: var(--text-muted); }
    .news-list {
        background: var(--card); border: 1px solid var(--border);
        border-radius: var(--radius); box-shadow: var(--shadow);
        padding: 8px 24px;
    }
    .news-list li {
        padding: 14px 0; border-bottom: 1px solid var(--border);
        display: flex; flex-direction: column; gap: 4px;
    }
    .news-list li:last-child { border-bottom: none; }
    .news-list li .tag { margin-bottom: 2px; align-self: flex-start; }
    .news-list li a {
        font-size: 15px; font-weight: 500; color: var(--text);
        line-height: 22px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        display: block;
    }
    .news-list li a:hover { color: var(--primary); }
    .empty-state {
        display: flex; flex-direction: column; align-items: center; justify-content: center;
        padding: 48px 24px; text-align: center;
    }
    .empty-icon {
        width: 48px; height: 48px; border-radius: 50%;
        background: #F1F5F9; display: flex; align-items: center; justify-content: center;
        color: var(--text-muted); font-size: 20px; margin-bottom: 12px;
    }
    .empty-state p { color: var(--text-muted); font-size: 14px; }

    /* Voices */
    .voices-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .voice-card {
        background: var(--card); border: 1px solid var(--border);
        border-radius: var(--radius); box-shadow: var(--shadow);
        padding: 24px; transition: var(--transition);
    }
    .voice-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
    .voice-stars { color: var(--accent); font-size: 14px; margin-bottom: 14px; }
    .voice-card p {
        font-size: 14px; color: var(--text-secondary); line-height: 24px;
        margin-bottom: 16px; font-style: italic;
    }
    .voice-user {
        display: flex; align-items: center; gap: 12px;
    }
    .voice-avatar {
        width: 36px; height: 36px; border-radius: 50%;
        background: var(--primary-light); color: var(--primary);
        display: flex; align-items: center; justify-content: center;
        font-size: 14px; font-weight: 600;
    }
    .voice-user .name { font-size: 14px; font-weight: 500; }
    .voice-user .role { font-size: 12px; color: var(--text-muted); }

    /* CTA Band */
    .cta-band {
        background: linear-gradient(120deg, #2563EB 0%, #1D4ED8 70%, #1E40AF 100%);
        padding: 56px 0; text-align: center; position: relative; overflow: hidden;
    }
    .cta-band::before {
        content: ''; position: absolute; top: 0; right: 0;
        width: 280px; height: 280px; border-radius: 50%;
        background: rgba(255,255,255,.06);
    }
    .cta-band h2 { font-size: 24px; color: #fff; font-weight: 700; margin-bottom: 12px; }
    .cta-band p { font-size: 14px; color: rgba(255,255,255,.8); margin-bottom: 28px; }
    .cta-band .btn { position: relative; z-index: 2; }

    /* FAQ */
    .faq-grid {
        display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
    }
    .faq-item {
        background: var(--card); border: 1px solid var(--border);
        border-radius: var(--radius); padding: 20px 24px;
        transition: var(--transition);
    }
    .faq-item:hover { box-shadow: var(--shadow-hover); }
    .faq-q {
        display: flex; align-items: flex-start; gap: 12px;
        font-size: 16px; font-weight: 500; margin-bottom: 8px;
    }
    .faq-q .q-badge {
        width: 20px; height: 20px; border-radius: 50%;
        background: var(--primary-light); color: var(--primary);
        font-size: 12px; font-weight: 700;
        display: flex; align-items: center; justify-content: center;
        flex-shrink: 0; margin-top: 2px;
    }
    .faq-a {
        font-size: 14px; color: #475569; line-height: 24px;
        padding-left: 32px;
    }
    .faq-more { text-align: center; margin-top: 32px; }
    .faq-more a {
        display: inline-flex; align-items: center; gap: 8px;
        font-size: 14px; color: var(--primary); font-weight: 500;
    }
    .faq-more a:hover { text-decoration: underline; }

    /* Footer */
    .site-footer { background: #1E293B; color: #CBD5E1; padding: 56px 0 24px; }
    .footer-top {
        display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
        gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(148,163,184,.15);
    }
    .footer-brand { max-width: 320px; }
    .footer-logo {
        display: flex; align-items: center; gap: 10px; margin-bottom: 16px;
    }
    .footer-logo .logo-icon {
        background: rgba(255,255,255,.1); color: #fff;
    }
    .footer-logo .logo-text { color: #fff; font-size: 18px; }
    .footer-logo .logo-text b { color: #93C5FD; }
    .footer-brand p { font-size: 14px; line-height: 24px; color: #94A3B8; }
    .footer-col h4 {
        font-size: 14px; color: #fff; font-weight: 600; margin-bottom: 16px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul a {
        font-size: 13px; color: #94A3B8; transition: var(--transition);
    }
    .footer-col ul a:hover { color: #fff; }
    .footer-bottom {
        display: flex; align-items: center; justify-content: space-between;
        padding-top: 24px; flex-wrap: wrap; gap: 12px;
        font-size: 13px; color: #94A3B8;
    }
    .footer-bottom a { color: #94A3B8; }
    .footer-bottom a:hover { color: #fff; }
    .footer-legal { display: flex; align-items: center; gap: 16px; }

    /* Bottom Tab (mobile) */
    .bottom-tab {
        display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
        background: #fff; border-top: 1px solid var(--border);
        height: 60px; padding-bottom: env(safe-area-inset-bottom);
        box-shadow: 0 -2px 12px rgba(15,23,42,.04);
    }
    .bottom-tab a {
        flex: 1; display: flex; flex-direction: column;
        align-items: center; justify-content: center; gap: 3px;
        font-size: 12px; color: #94A3B8; transition: var(--transition);
    }
    .bottom-tab a i { font-size: 20px; }
    .bottom-tab a.active { color: var(--primary); font-weight: 600; }
    .bottom-tab a:hover { color: var(--primary); }

    /* Responsive */
    @media (max-width: 1199px) {
        .container { padding: 0 24px; }
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .feature-card.feature-card-wide { grid-column: span 2; }
        .footer-top { grid-template-columns: 2fr 1fr 1fr; }
    }
    @media (min-width: 768px) and (max-width: 1199px) {
        .main-nav a { padding: 8px 10px; font-size: 14px; }
        .header-cta .btn { padding: 8px 16px; font-size: 14px; }
        .hero-inner { flex-direction: column; gap: 40px; }
        .hero-visual { max-width: 100%; }
        .timeline-grid { grid-template-columns: 1fr; gap: 32px; }
        .news-grid { grid-template-columns: 1fr; }
        .voices-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 767px) {
        .container { padding: 0 16px; }
        .section { padding: 40px 0; }
        .site-header { height: 64px; }
        .header-inner { height: 64px; }
        .main-nav, .header-cta .login-link, .header-cta .btn { display: none; }
        .nav-toggle { display: block; }
        .hero { padding: 48px 0 40px; }
        .hero-inner { flex-direction: column; gap: 32px; padding: 0 16px; }
        .hero h1 { font-size: 26px; line-height: 38px; }
        .hero-visual { max-width: 100%; }
        .hero-badge { left: 12px; bottom: 12px; }
        .hero-trust { gap: 16px; }
        .features-grid { grid-template-columns: 1fr; }
        .feature-card.feature-card-wide { grid-column: span 1; flex-direction: column; align-items: flex-start; }
        .feature-card.feature-card-wide img { width: 100%; height: auto; }
        .trust-bar-inner { flex-direction: column; align-items: flex-start; }
        .trust-item { width: 100%; }
        .timeline-grid { grid-template-columns: 1fr; gap: 28px; }
        .news-grid { grid-template-columns: 1fr; }
        .news-main img { height: 180px; }
        .voices-grid { grid-template-columns: 1fr; }
        .cta-band { padding: 40px 0; }
        .faq-grid { grid-template-columns: 1fr; }
        .footer-top { grid-template-columns: 1fr 1fr; gap: 24px; }
        .footer-brand { max-width: 100%; }
        .footer-bottom { flex-direction: column; align-items: flex-start; }
        .bottom-tab { display: flex; }
        body { padding-bottom: 60px; }
        .section-header h2 { font-size: 22px; }
        .section-header { margin-bottom: 24px; }
        .btn { padding: 10px 20px; font-size: 14px; }
        .mobile-menu a { padding: 14px 20px; }
    }
    @media (min-width: 768px) {
        .mobile-menu { display: none !important; }
    }
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after { animation: none !important; transition: none !important; }
    }

/* roulang page: article */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #EFF4FF;
    --accent: #F59E0B;
    --accent-light: #FEF3C7;
    --bg: #F7F9FC;
    --card-bg: #FFFFFF;
    --text: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --success: #10B981;
    --danger: #EF4444;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-tag: 4px;
    --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 8px 24px rgba(37, 99, 235, 0.10);
    --shadow-header: 0 2px 12px rgba(15, 23, 42, 0.06);
    --font-base: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    --transition: 0.25s ease-out;
    --container-w: 1200px;
}

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

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

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-bottom: 76px;
}

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

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

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

ul, ol {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--container-w);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ========== Header ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--transition);
    height: 72px;
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: background var(--transition), transform var(--transition);
}

.logo:hover .logo-icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(-6deg) scale(1.04);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.logo-text b {
    font-weight: 400;
    color: var(--primary);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 auto;
}

.main-nav a {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
    position: relative;
}

.main-nav a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.main-nav a.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
}

.main-nav a.active::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 2px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.header-cta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.login-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 6px 4px;
    position: relative;
}

.login-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

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

.login-link:hover::after {
    width: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    white-space: nowrap;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

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

.btn-primary:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.15);
    outline-offset: 2px;
}

.btn-secondary {
    background: transparent;
    border-color: #CBD5E1;
    color: #334155;
}

.btn-secondary:hover {
    background: #F1F5F9;
    border-color: #94A3B8;
    color: var(--text);
    transform: translateY(-1px);
}

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

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

.btn-outline-light:hover {
    background: #E0E7FF;
    color: var(--primary-dark);
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--bg);
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.nav-toggle:hover {
    background: var(--primary-light);
}

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

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.breadcrumb a {
    color: var(--text-secondary);
    font-size: 13px;
}

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

.breadcrumb .sep {
    color: #CBD5E1;
    font-size: 12px;
}

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

/* ========== Article Layout ========== */
.article-wrapper {
    padding: 28px 0 60px;
}

.article-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.article-main {
    flex: 1;
    min-width: 0;
    max-width: 860px;
}

.article-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-card);
    padding: 40px 48px;
}

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

.article-header .article-title {
    font-size: 28px;
    line-height: 1.45;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    letter-spacing: 0.01em;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--border);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
}

.meta-item i {
    font-size: 13px;
    color: var(--text-muted);
}

.meta-pill {
    display: inline-flex;
    align-items: center;
    padding: 2px 12px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-tag);
    line-height: 24px;
}

.article-body {
    padding-top: 28px;
    font-size: 16.5px;
    line-height: 1.9;
    color: #334155;
    letter-spacing: 0.01em;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.article-body p {
    margin: 0 0 20px;
}

.article-body h2,
.article-body h3 {
    margin: 28px 0 14px;
    color: var(--text);
    font-weight: 700;
    line-height: 1.4;
}

.article-body h2 {
    font-size: 22px;
    border-left: 4px solid var(--primary);
    padding-left: 14px;
}

.article-body h3 {
    font-size: 18px;
}

.article-body img {
    border-radius: 12px;
    margin: 24px auto;
    box-shadow: var(--shadow-card);
}

.article-body figure {
    margin: 24px 0;
    text-align: center;
}

.article-body figcaption {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
}

.article-body blockquote {
    background: #F0F5FF;
    border-left: 4px solid var(--primary);
    margin: 24px 0;
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    color: #475569;
    font-size: 15.5px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 20px;
    padding-left: 24px;
}

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

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

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

.article-body a {
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-body code {
    background: #F1F5F9;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
    color: #0F172A;
    font-family: "SFMono-Regular", Consolas, monospace;
}

.article-body pre {
    background: #1E293B;
    color: #E2E8F0;
    padding: 20px 24px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 24px 0;
    font-size: 14px;
    line-height: 1.7;
}

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

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
}

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

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

.article-body a.external {
    color: var(--primary);
}

/* Not found */
.article-not-found {
    text-align: center;
    padding: 80px 20px;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
}

.article-not-found .nf-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--text-muted);
}

.article-not-found h2 {
    font-size: 22px;
    color: var(--text);
    margin-bottom: 10px;
}

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

/* ========== Sidebar ========== */
.article-sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 92px;
}

.sidebar-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-card);
    padding: 20px;
}

.sidebar-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-card h3 i {
    color: var(--primary);
    font-size: 14px;
}

.toc-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.toc-list a {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 6px 8px;
    border-radius: 6px;
    line-height: 1.5;
    transition: all var(--transition);
}

.toc-list a i {
    font-size: 8px;
    margin-top: 7px;
    color: #CBD5E1;
    transition: color var(--transition);
}

.toc-list a:hover {
    background: var(--bg);
    color: var(--primary);
}

.toc-list a:hover i {
    color: var(--primary);
}

.toc-list a.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 500;
}

.toc-list a.active i {
    color: var(--primary);
}

.hot-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #F1F5F9;
}

.hot-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.hot-list .rank {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-muted);
    min-width: 24px;
    text-align: center;
    font-style: italic;
}

.hot-list li:nth-child(-n+3) .rank {
    color: var(--primary);
}

.hot-list .hot-info {
    flex: 1;
    min-width: 0;
}

.hot-list .hot-title {
    display: block;
    font-size: 14px;
    color: var(--text);
    line-height: 1.45;
    margin-bottom: 3px;
    transition: color var(--transition);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hot-list a:hover .hot-title {
    color: var(--primary);
}

.hot-list .hot-views {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.hot-list .hot-views i {
    font-size: 11px;
}

.sidebar-cta {
    background: linear-gradient(135deg, #EFF4FF 0%, #F0F5FF 100%);
    border: 1px solid #D6E4FF;
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
}

.sidebar-cta .cta-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.sidebar-cta h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.sidebar-cta p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

/* ========== Related Section ========== */
.related-section {
    margin-top: 36px;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 28px;
}

.related-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.related-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.related-header h2::before {
    content: "";
    width: 4px;
    height: 20px;
    background: var(--primary);
    border-radius: 2px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.related-card {
    display: flex;
    gap: 12px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: all var(--transition);
    background: var(--card-bg);
}

.related-card:hover {
    border-color: #CBD5E1;
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.related-card img {
    width: 96px;
    height: 64px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.related-card .rel-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.related-card .rel-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition);
}

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

.related-card .rel-time {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.related-card .rel-time i {
    font-size: 11px;
}

.article-back {
    margin-top: 28px;
    text-align: center;
}

/* ========== Footer ========== */
.site-footer {
    background: #1E293B;
    color: #CBD5E1;
    padding: 56px 0 24px;
    margin-top: 40px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 36px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.footer-logo .logo-icon {
    background: rgba(37, 99, 235, 0.2);
    color: #93C5FD;
}

.footer-logo .logo-text {
    color: #F1F5F9;
}

.footer-logo .logo-text b {
    color: #93C5FD;
}

.footer-brand p {
    font-size: 13px;
    line-height: 1.8;
    color: #94A3B8;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: #F1F5F9;
    margin-bottom: 16px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 13px;
    color: #94A3B8;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: #E2E8F0;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 20px;
    font-size: 13px;
    color: #64748B;
}

.footer-bottom a {
    color: #64748B;
    transition: color var(--transition);
}

.footer-bottom a:hover {
    color: #94A3B8;
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ========== Mobile Bottom Tabs ========== */
.mobile-tabs {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    z-index: 999;
    padding-bottom: env(safe-area-inset-bottom);
}

.mobile-tabs .m-tabs-inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    height: 60px;
}

.mobile-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-muted);
    transition: color var(--transition);
}

.mobile-tab i {
    font-size: 20px;
    line-height: 1;
}

.mobile-tab span {
    font-size: 11px;
    font-weight: 500;
}

.mobile-tab.active {
    color: var(--primary);
}

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

/* ========== Responsive ========== */
@media (max-width: 1199px) {
    .container {
        padding-left: 20px;
        padding-right: 20px;
    }
}

@media (max-width: 1024px) {
    .footer-top {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
}

@media (max-width: 768px) {
    body {
        padding-bottom: 76px;
    }

    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .site-header {
        height: 60px;
    }

    .header-inner {
        height: 60px;
        gap: 10px;
    }

    .logo-text {
        font-size: 16px;
    }

    .main-nav {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: 16px 20px;
        gap: 4px;
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
        border-bottom: 1px solid var(--border);
    }

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

    .main-nav a {
        padding: 12px 16px;
        border-radius: 10px;
        width: 100%;
    }

    .main-nav a.active::after {
        display: none;
    }

    .main-nav a.active {
        background: var(--primary-light);
    }

    .header-cta .login-link {
        display: none;
    }

    .header-cta .btn {
        padding: 8px 16px;
        font-size: 14px;
    }

    .nav-toggle {
        display: flex;
    }

    .breadcrumb-wrap {
        padding-top: 14px;
    }

    .article-wrapper {
        padding: 16px 0 40px;
    }

    .article-layout {
        flex-direction: column;
        gap: 24px;
    }

    .article-card {
        padding: 24px 20px;
        border-radius: 12px;
    }

    .article-header .article-title {
        font-size: 22px;
        line-height: 1.45;
    }

    .article-meta {
        gap: 8px;
    }

    .article-body {
        font-size: 15.5px;
        line-height: 1.85;
        padding-top: 20px;
    }

    .article-body h2 {
        font-size: 19px;
    }

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

    .article-sidebar {
        width: 100%;
        position: static;
        order: 2;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

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

    .mobile-tabs {
        display: block;
    }

    .footer-top {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 16px;
        padding-bottom: 32px;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .footer-legal {
        justify-content: center;
    }
}

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

    .article-header .article-title {
        font-size: 20px;
    }

    .meta-item {
        font-size: 13px;
    }

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

    .header-cta .btn {
        padding: 7px 14px;
        font-size: 13px;
    }

    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 16px;
        border-radius: 8px;
    }

    .logo-text {
        font-size: 15px;
    }

    .related-section {
        padding: 20px 16px;
    }

    .related-card {
        padding: 12px;
    }

    .related-card img {
        width: 80px;
        height: 56px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EFF4FF;
            --accent: #F59E0B;
            --bg: #F7F9FC;
            --card-bg: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --success: #10B981;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow-hover: 0 8px 24px rgba(37, 99, 235, .10);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
            --transition: all .25s ease-out;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul {
            list-style: none;
        }

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

        /* ============ 按钮系统 ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .3);
        }

        .btn-secondary {
            background: transparent;
            color: #334155;
            border-color: #CBD5E1;
        }
        .btn-secondary:hover {
            background: #F1F5F9;
            border-color: #94A3B8;
        }
        .btn-secondary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .btn-white:hover {
            background: #E0E7FF;
            border-color: #E0E7FF;
            transform: translateY(-1px);
        }

        /* ============ 顶部导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #fff;
            border-bottom: 1px solid var(--border);
            height: 72px;
            transition: box-shadow .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 2px 12px rgba(15, 23, 42, .06);
        }

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

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary-light);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
        }
        .logo-text {
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }
        .logo-text b {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin: 0 auto;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .login-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .login-link:hover {
            color: var(--primary);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
            border-radius: 6px;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 30px rgba(15, 23, 42, .08);
            z-index: 99;
            padding: 16px 24px 24px;
        }
        .mobile-nav-panel.open {
            display: block;
        }
        .mobile-nav-panel a {
            display: block;
            padding: 14px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid var(--border);
        }
        .mobile-nav-panel a:last-child {
            border-bottom: none;
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            color: var(--primary);
        }

        /* ============ 页头 Hero ============ */
        .page-hero {
            background: linear-gradient(135deg, rgba(247, 249, 252, .97), rgba(224, 234, 253, .92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 64px 0 72px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -30px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(37, 99, 235, .05);
            pointer-events: none;
        }
        .breadcrumb {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-light);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        .page-hero-grid {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 48px;
            align-items: center;
        }
        .page-hero-content h1 {
            font-size: 32px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .page-hero-content h1 span {
            color: var(--primary);
        }
        .page-hero-content .lead {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 540px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }
        .hero-actions .secure-tip {
            font-size: 13px;
            color: var(--text-light);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding-left: 4px;
        }
        .hero-actions .secure-tip i {
            color: var(--success);
        }
        .page-hero-visual img {
            width: 100%;
            border-radius: var(--radius-card);
            box-shadow: 0 10px 32px rgba(15, 23, 42, .10);
            object-fit: cover;
            aspect-ratio: 16/10;
        }

        /* ============ 分类 Tab 切换条 ============ */
        .category-tabs {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }
        .category-tabs .container {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            scrollbar-width: none;
            padding-top: 18px;
            padding-bottom: 18px;
        }
        .category-tabs .container::-webkit-scrollbar {
            display: none;
        }
        .category-tabs a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            white-space: nowrap;
            transition: var(--transition);
        }
        .category-tabs a:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-light);
        }
        .category-tabs a.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .category-tabs a i {
            font-size: 13px;
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head .tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: 26px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--text);
        }
        .section-head .sub {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
            max-width: 640px;
            line-height: 1.7;
        }

        /* ============ 核心优势 ============ */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 22px;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            margin-bottom: 18px;
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ============ 适用场景 ============ */
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .scene-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .scene-card .img-wrap {
            overflow: hidden;
            aspect-ratio: 16/9;
        }
        .scene-card .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform .35s ease;
        }
        .scene-card:hover .img-wrap img {
            transform: scale(1.03);
        }
        .scene-card .scene-body {
            padding: 22px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .scene-card .scene-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .scene-card .scene-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            flex: 1;
        }
        .scene-card .scene-meta {
            margin-top: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            font-size: 12px;
            line-height: 1;
            padding: 5px 10px;
            border-radius: var(--radius-tag);
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 500;
        }

        /* ============ 登录流程 ============ */
        .process-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            position: relative;
            padding: 28px 20px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }
        .step-item:nth-child(2) .step-num {
            background: var(--accent);
        }
        .step-item:nth-child(3) .step-num {
            background: var(--success);
        }
        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ============ 服务保障统计 ============ */
        .stats-section {
            background: var(--primary);
            padding: 48px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .stat-item {
            text-align: center;
            color: #fff;
            padding: 20px;
        }
        .stat-icon {
            font-size: 30px;
            margin-bottom: 12px;
            opacity: .95;
        }
        .stat-num {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 6px;
        }
        .stat-item p {
            font-size: 14px;
            opacity: .85;
            line-height: 1.6;
        }

        /* ============ FAQ ============ */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .faq-q-badge {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 1px;
        }
        .faq-item:nth-child(2n) .faq-q-badge {
            background: var(--accent);
        }
        .faq-answer {
            padding-left: 36px;
            font-size: 14px;
            color: #475569;
            line-height: 1.7;
        }
        .faq-more {
            text-align: center;
            margin-top: 32px;
        }
        .faq-more a {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .faq-more a:hover {
            color: var(--primary-dark);
        }
        .faq-more a i {
            transition: transform .25s ease;
        }
        .faq-more a:hover i {
            transform: translateX(4px);
        }

        /* ============ CTA 横幅 ============ */
        .cta-banner {
            background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
            padding: 64px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cta-text h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cta-text p {
            font-size: 15px;
            opacity: .85;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: #1E293B;
            color: #CBD5E1;
            padding: 56px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .logo-icon {
            background: rgba(37, 99, 235, .2);
            color: #60A5FA;
        }
        .footer-brand .logo-text {
            color: #fff;
        }
        .footer-brand .logo-text b {
            color: #60A5FA;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: #94A3B8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            color: #fff;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 2px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0 24px;
            font-size: 13px;
            color: #94A3B8;
        }
        .footer-legal {
            display: flex;
            gap: 16px;
        }
        .footer-legal a {
            color: #94A3B8;
        }
        .footer-legal a:hover {
            color: #fff;
        }

        /* ============ 移动端底部 Tab ============ */
        .mobile-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #fff;
            border-top: 1px solid var(--border);
            z-index: 999;
            padding-bottom: env(safe-area-inset-bottom);
        }
        .tabbar-inner {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            height: 100%;
        }
        .tabbar-inner a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 12px;
            color: #94A3B8;
        }
        .tabbar-inner a i {
            font-size: 18px;
            line-height: 1;
        }
        .tabbar-inner a.active {
            color: var(--primary);
        }
        .tabbar-inner a:hover {
            color: var(--primary);
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1199px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                gap: 16px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 991px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .page-hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .page-hero-visual {
                max-width: 640px;
            }
            .scenes-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
            body {
                padding-bottom: 76px;
            }
            .mobile-tabbar {
                display: block;
            }
            .site-header {
                height: 64px;
            }
            .header-inner {
                height: 64px;
            }
            .header-cta .login-link {
                display: none;
            }
            .header-cta .btn {
                padding: 8px 16px;
                font-size: 14px;
            }
            .page-hero {
                padding: 40px 0 48px;
            }
            .page-hero-content h1 {
                font-size: 26px;
                line-height: 1.4;
            }
            .hero-actions {
                gap: 10px;
            }
            .hero-actions .secure-tip {
                width: 100%;
                margin-top: 6px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scenes-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .faq-item {
                padding: 20px;
            }
            .section {
                padding: 44px 0;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .cta-banner {
                padding: 44px 0;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

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

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation: none !important;
                transition: none !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category2 */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #EFF4FF;
  --accent: #F59E0B;
  --bg-body: #F7F9FC;
  --bg-card: #FFFFFF;
  --text-main: #1E293B;
  --text-muted: #64748B;
  --text-soft: #94A3B8;
  --border: #E2E8F0;
  --success: #10B981;
  --warning: #EF4444;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 4px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
  --shadow-hover: 0 8px 24px rgba(37, 99, 235, .10);
  --container: 1200px;
  --gap: 24px;
  --transition: all .25s ease-out;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* 顶部导航 */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(15,23,42,.06);
  height: 72px;
  display: flex; align-items: center;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.logo-text { font-size: 18px; font-weight: 700; color: var(--text-main); }
.logo-text b { font-weight: 600; color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 16px; font-size: 15px; font-weight: 500;
  color: var(--text-muted); border-radius: 8px; line-height: 1.4;
}
.main-nav a:hover { background: var(--primary-light); color: var(--primary); }
.main-nav a.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.header-cta { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.login-link { font-size: 15px; font-weight: 500; color: var(--text-muted); }
.login-link:hover { color: var(--primary); }
.nav-toggle {
  display: none; background: none; border: none; font-size: 22px;
  color: var(--text-main); cursor: pointer; padding: 6px;
}

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 600; padding: 10px 24px;
  border-radius: var(--radius-btn); border: 1px solid transparent;
  cursor: pointer; transition: var(--transition); line-height: 1.4; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(37, 99, 235, .18); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible { outline: 3px solid rgba(37, 99, 235, .3); outline-offset: 2px; }
.btn-outline { background: #fff; border-color: #CBD5E1; color: #334155; }
.btn-outline:hover { background: #F1F5F9; border-color: var(--primary); color: var(--primary); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: #E0E7FF; }

/* 移动端底部 Tab（与顶部导航入口一致） */
.mobile-tabbar {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 200;
  height: 60px; background: var(--bg-card); border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom);
}
.tabbar-inner { display: flex; height: 100%; align-items: stretch; }
.tab-item {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; color: var(--text-soft); font-size: 12px; line-height: 1.2; transition: var(--transition);
}
.tab-item i { font-size: 20px; line-height: 1; }
.tab-item.active { color: var(--primary); font-weight: 600; }

/* Hero */
.hero {
  position: relative; padding: 88px 0 64px;
  background: linear-gradient(135deg, #F7F9FC 0%, #E0EAFD 100%);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; top: -80px; right: -60px;
  width: 360px; height: 360px; border-radius: 50%;
  background: rgba(37, 99, 235, .07);
}
.hero::after {
  content: ""; position: absolute; bottom: -100px; left: -40px;
  width: 280px; height: 280px; border-radius: 50%;
  background: rgba(245, 158, 11, .06);
}
.hero-bg {
  position: absolute; inset: 0; object-fit: cover; opacity: .08; width: 100%; height: 100%;
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 720px; }
.hero-tag {
  display: inline-block; background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 600; padding: 4px 12px;
  border-radius: var(--radius-tag); margin-bottom: 16px;
}
.hero h1 { font-size: 32px; line-height: 1.4; font-weight: 700; color: var(--text-main); }
.hero h1 strong { color: var(--primary); }
.hero-sub { font-size: 16px; line-height: 1.8; color: var(--text-muted); margin-top: 18px; max-width: 640px; }
.hero-cta { display: flex; align-items: center; gap: 16px; margin-top: 28px; flex-wrap: wrap; }
.hero-note { font-size: 13px; color: var(--text-soft); display: flex; align-items: center; gap: 6px; }
.hero-trust {
  display: flex; gap: 28px; margin-top: 36px; padding-top: 24px;
  border-top: 1px solid rgba(226, 232, 240, .7); flex-wrap: wrap;
}
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); }
.trust-item i { color: var(--success); font-size: 15px; }

/* 面包屑 */
.breadcrumb {
  padding: 16px 0; font-size: 13px; color: var(--text-soft);
  border-bottom: 1px solid var(--border); background: var(--bg-card);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text-soft); }
.breadcrumb .current { color: var(--primary); font-weight: 500; }

/* 分类 Tab 条 */
.tab-bar {
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.tab-list { display: flex; gap: 12px; overflow-x: auto; scrollbar-width: none; }
.tab-list::-webkit-scrollbar { display: none; }
.tab-btn {
  flex-shrink: 0; padding: 8px 20px; border-radius: var(--radius-btn);
  border: 1px solid var(--border); background: #fff; color: var(--text-muted);
  font-size: 14px; font-weight: 500; cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.tab-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 板块通用 */
.section { padding: 68px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 36px; flex-wrap: wrap; }
.section-title-wrap { display: flex; align-items: center; gap: 12px; }
.section-dot { width: 8px; height: 26px; border-radius: 4px; background: var(--primary); }
.section-title { font-size: 26px; line-height: 1.4; font-weight: 700; }
.section-sub { font-size: 14px; color: var(--text-muted); margin-top: 8px; }

/* 核心能力卡片 */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 28px 24px;
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(37, 99, 235, .2); }
.feature-icon {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 16px;
}
.feature-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.7; color: var(--text-muted); }

/* 流程 */
.process-section { background: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.process-item { position: relative; padding: 28px 24px; background: var(--bg-body); border-radius: var(--radius-card); border: 1px solid var(--border); transition: var(--transition); }
.process-item:hover { box-shadow: var(--shadow-hover); border-color: rgba(37, 99, 235, .2); }
.process-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--primary); color: #fff; font-weight: 700; font-size: 16px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.process-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.process-item p { font-size: 13px; line-height: 1.7; color: var(--text-muted); }

/* 适用场景 */
.scene-wrap { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.scene-image { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-hover); }
.scene-image img { width: 100%; height: auto; min-height: 340px; object-fit: cover; }
.scene-list { display: flex; flex-direction: column; gap: 20px; }
.scene-item { display: flex; gap: 16px; padding: 20px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-card); transition: var(--transition); }
.scene-item:hover { box-shadow: var(--shadow-sm); border-color: rgba(37, 99, 235, .25); }
.scene-icon { flex-shrink: 0; width: 42px; height: 42px; border-radius: 10px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 18px; }
.scene-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.scene-item p { font-size: 14px; line-height: 1.6; color: var(--text-muted); }

/* 信任标识 */
.trust-band { background: var(--text-main); color: #fff; }
.trust-band .section-title { color: #fff; }
.trust-band .section-sub { color: #94A3B8; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.trust-card { text-align: center; padding: 32px 20px; background: rgba(255, 255, 255, .06); border-radius: var(--radius-card); border: 1px solid rgba(255, 255, 255, .08); transition: var(--transition); }
.trust-card:hover { background: rgba(255, 255, 255, .1); transform: translateY(-2px); }
.trust-card i { font-size: 28px; color: var(--accent); margin-bottom: 14px; }
.trust-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.trust-card p { font-size: 13px; color: #94A3B8; line-height: 1.6; }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 32px; }
.faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 24px; transition: var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-sm); border-color: rgba(37, 99, 235, .2); }
.faq-q { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.faq-badge {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
.faq-item h3 { font-size: 16px; font-weight: 500; line-height: 1.5; }
.faq-item p { font-size: 14px; line-height: 1.7; color: #475569; padding-left: 40px; }
.faq-more { text-align: center; margin-top: 36px; }
.faq-link { font-size: 15px; color: var(--primary); font-weight: 500; }
.faq-link i { transition: transform .25s; }
.faq-link:hover i { transform: translateX(4px); }

/* CTA */
.cta-banner { background: var(--primary); padding: 56px 0; position: relative; overflow: hidden; }
.cta-banner::after { content: ""; position: absolute; top: -60px; right: 80px; width: 240px; height: 240px; border-radius: 50%; background: rgba(255, 255, 255, .06); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; position: relative; z-index: 2; }
.cta-text h2 { color: #fff; font-size: 26px; font-weight: 700; margin-bottom: 8px; }
.cta-text p { color: rgba(255, 255, 255, .85); font-size: 14px; max-width: 520px; }

/* 页脚 */
.site-footer { background: #1E293B; color: #CBD5E1; padding-top: 56px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-logo .logo-icon { background: rgba(255, 255, 255, .1); color: #fff; }
.footer-logo .logo-text { color: #fff; }
.footer-logo .logo-text b { color: #fff; }
.footer-brand > p { font-size: 13px; line-height: 1.7; color: #94A3B8; max-width: 280px; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { font-size: 13px; color: #94A3B8; }
.footer-col ul a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #334155; padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: #64748B;
}
.footer-legal { display: flex; align-items: center; gap: 12px; }
.footer-legal a { color: #64748B; }
.footer-legal a:hover { color: #fff; }
body { padding-bottom: 0; }

/* 响应式 */
@media (max-width: 1199px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1.4fr 1fr 1fr; }
}

@media (max-width: 991px) {
  .main-nav { display: none; }
  .nav-toggle { display: block; }
  .header-cta .btn-primary { display: none; }
  .mobile-tabbar { display: block; }
  body { padding-bottom: 76px; }
  .site-footer { padding-bottom: 76px; }
  .scene-wrap { grid-template-columns: 1fr; gap: 32px; }
  .scene-image img { min-height: 240px; }
  .container { padding: 0 20px; }
}

@media (max-width: 767px) {
  .section { padding: 44px 0; }
  .hero { padding: 56px 0 44px; }
  .hero h1 { font-size: 26px; line-height: 1.45; }
  .hero-sub { font-size: 14px; }
  .hero-cta { gap: 12px; }
  .hero-trust { gap: 16px; row-gap: 10px; }
  .section-title { font-size: 22px; }
  .feature-grid, .process-grid, .trust-grid { grid-template-columns: 1fr; gap: 16px; }
  .faq-grid { grid-template-columns: 1fr; gap: 16px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-text p { max-width: none; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 24px; padding-bottom: 30px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .tab-btn { padding: 7px 16px; font-size: 13px; }
  .header-inner { gap: 12px; }
  .logo-text { font-size: 16px; }
  .login-link { font-size: 14px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .btn-primary { padding: 10px 18px; font-size: 15px; }
  .feature-card { padding: 20px 18px; }
  .process-item { padding: 22px 18px; }
  .faq-item { padding: 18px 16px; }
  .faq-item p { padding-left: 0; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-brand p { max-width: none; }
}

/* roulang page: category3 */
:root{
  --primary:#2563EB;
  --primary-dark:#1D4ED8;
  --primary-light:#EFF4FF;
  --accent:#F59E0B;
  --bg:#F7F9FC;
  --card-bg:#FFFFFF;
  --text:#1E293B;
  --text-secondary:#64748B;
  --text-muted:#94A3B8;
  --border:#E2E8F0;
  --success:#10B981;
  --danger:#EF4444;
  --radius:12px;
  --radius-btn:8px;
  --radius-tag:4px;
  --shadow-sm:0 1px 3px rgba(15,23,42,.06);
  --shadow-md:0 8px 24px rgba(37,99,235,.10);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  --space-section:64px;
  --space-card:24px;
  --gap-grid:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:26px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none;transition:color .2s linear}
a:hover{color:var(--primary-dark)}
img{max-width:100%;display:block}
button{font-family:var(--font);cursor:pointer;border:none;background:none}
input{font-family:var(--font)}
.container{width:1200px;max-width:100%;margin:0 auto;padding:0 24px}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:100;background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s ease;
}
.site-header.scrolled{box-shadow:0 2px 12px rgba(15,23,42,.06)}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:72px;gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{
  width:38px;height:38px;border-radius:10px;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:19px;
}
.logo-text{font-size:18px;color:var(--text);font-weight:600;white-space:nowrap}
.logo-text b{color:var(--primary);font-weight:700}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  padding:8px 14px;border-radius:8px;font-size:15px;font-weight:500;
  color:var(--text-secondary);line-height:1.2;
}
.main-nav a:hover{color:var(--primary);background:var(--primary-light)}
.main-nav a.active{color:var(--primary);background:var(--primary-light);position:relative}
.main-nav a.active::after{
  content:'';position:absolute;left:14px;right:14px;bottom:3px;height:2px;
  background:var(--primary);border-radius:2px;
}
.header-cta{display:flex;align-items:center;gap:14px;flex-shrink:0}
.login-link{font-size:15px;font-weight:500;color:var(--text-secondary)}
.login-link:hover{color:var(--primary)}
.nav-toggle{display:none;font-size:20px;color:var(--text);padding:8px;border-radius:8px}
.nav-toggle:hover{background:var(--bg)}
.btn{
  display:inline-block;padding:10px 24px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;line-height:1.4;text-align:center;
  transition:background .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(37,99,235,.3)}
.btn-secondary{
  background:#fff;color:#334155;border:1px solid #CBD5E1;
}
.btn-secondary:hover{background:#F1F5F9;border-color:#94A3B8;color:var(--text)}
.btn-light{background:#fff;color:var(--primary)}
.btn-light:hover{background:#E0E7FF;color:var(--primary-dark)}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6)}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}

/* ===== Mobile Menu ===== */
.mobile-menu{
  display:none;position:fixed;top:72px;left:0;right:0;z-index:99;
  background:#fff;border-bottom:1px solid var(--border);
  box-shadow:0 16px 40px rgba(15,23,42,.12);
  padding:16px 24px 24px;flex-direction:column;gap:6px;
}
.mobile-menu.open{display:flex}
.mobile-menu a{
  display:block;padding:12px 14px;border-radius:10px;
  font-size:16px;font-weight:500;color:var(--text);
}
.mobile-menu a:hover{background:var(--primary-light);color:var(--primary)}
.mobile-menu a.active{background:var(--primary-light);color:var(--primary)}
.mobile-menu .mobile-menu-cta{
  margin-top:12px;background:var(--primary);color:#fff;text-align:center;
  padding:12px 14px;border-radius:var(--radius-btn);
}
.mobile-menu .mobile-menu-cta:hover{background:var(--primary-dark);color:#fff}
body.menu-open{overflow:hidden}

/* ===== Breadcrumb ===== */
.breadcrumb{
  display:flex;align-items:center;gap:8px;padding-top:20px;
  font-size:13px;color:var(--text-muted);
}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{color:var(--text-muted)}
.breadcrumb .current{color:var(--text)}

/* ===== Category Hero ===== */
.cat-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,#F7F9FC 0%,#E0EAFD 100%);
  padding:64px 0 56px;border-bottom:1px solid var(--border);
}
.cat-hero::before{
  content:'';position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.10;
}
.cat-hero::after{
  content:'';position:absolute;width:280px;height:280px;border-radius:50%;
  border:44px solid rgba(37,99,235,.08);top:-90px;right:-70px;
}
.cat-hero .container{position:relative;z-index:2}
.cat-hero-content{max-width:820px}
.cat-badge{
  display:inline-flex;align-items:center;gap:8px;padding:5px 14px;
  background:rgba(37,99,235,.08);color:var(--primary);
  font-size:13px;font-weight:600;border-radius:var(--radius-tag);
  margin-bottom:18px;
}
.cat-hero h1{
  font-size:32px;line-height:44px;font-weight:700;
  color:var(--text);margin-bottom:14px;
}
.cat-hero h1 span{color:var(--primary)}
.cat-hero .lead{
  font-size:16px;line-height:26px;color:var(--text-secondary);
  max-width:640px;margin-bottom:28px;
}
.cat-hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.cat-hero-stats{
  display:flex;gap:28px;flex-wrap:wrap;margin-top:36px;
  padding-top:22px;border-top:1px solid rgba(226,232,240,.7);
}
.cat-hero-stats .stat{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--text-secondary);font-weight:500;
}
.cat-hero-stats .stat i{color:var(--primary);font-size:16px}

/* ===== Category Tabs ===== */
.category-tabs{
  display:flex;gap:10px;flex-wrap:wrap;margin-top:26px;
}
.category-tabs a{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 20px;border:1px solid var(--border);border-radius:8px;
  background:#fff;color:var(--text-secondary);font-size:14px;font-weight:500;
  transition:all .2s ease;
}
.category-tabs a:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.category-tabs a.active{background:var(--primary);border-color:var(--primary);color:#fff}

/* ===== Section ===== */
.cat-section{padding:var(--space-section) 0}
.cat-section+.cat-section{padding-top:0}
.section-head{max-width:720px;margin-bottom:40px}
.section-mark{
  display:inline-block;width:24px;height:4px;border-radius:2px;
  background:var(--primary);margin-bottom:12px;
}
.section-head h2{
  font-size:26px;line-height:36px;font-weight:700;color:var(--text);
  margin-bottom:10px;
}
.section-head p{font-size:15px;line-height:24px;color:var(--text-secondary)}

/* ===== Service Grid ===== */
.service-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-grid);
}
.service-card{
  background:var(--card-bg);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow-sm);
  padding:var(--space-card);display:flex;flex-direction:column;
  transition:box-shadow .25s ease,transform .25s ease,background .25s ease;
}
.service-card:hover{
  box-shadow:var(--shadow-md);transform:translateY(-2px);background:#F8FAFF;
}
.service-icon{
  width:44px;height:44px;border-radius:50%;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;margin-bottom:16px;
}
.service-card h3{font-size:18px;line-height:26px;font-weight:600;margin-bottom:8px}
.service-card p{
  font-size:14px;line-height:22px;color:var(--text-secondary);
  margin-bottom:16px;flex-grow:1;
}
.service-link{
  font-size:14px;font-weight:600;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
}
.service-link i{transition:transform .2s ease}
.service-link:hover i{transform:translateX(4px)}
.service-card-wide{
  grid-column:span 2;
  display:grid;grid-template-columns:1.1fr .9fr;gap:24px;
  background:linear-gradient(135deg,#F8FAFF,#FFFFFF);
  box-shadow:var(--shadow-sm);
}
.service-card-wide .wide-body{
  display:flex;flex-direction:column;align-items:flex-start;
}
.service-card-wide .wide-media{
  border-radius:10px;overflow:hidden;min-height:180px;
  background:#EFF4FF;
}
.service-card-wide .wide-media img{
  width:100%;height:100%;object-fit:cover;
}

/* ===== Steps ===== */
.steps-section{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.steps-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap-grid);
}
.step-card{
  background:var(--bg);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px 24px;
  transition:box-shadow .25s ease,transform .25s ease;
}
.step-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.step-num{
  font-size:36px;line-height:1;font-weight:700;color:var(--primary-light);
  -webkit-text-stroke:1px var(--primary);margin-bottom:14px;
}
.step-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step-card p{font-size:14px;line-height:22px;color:var(--text-secondary)}

/* ===== Scenarios ===== */
.scenarios-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-grid);
}
.scenario-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:box-shadow .25s ease,transform .25s ease;
}
.scenario-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.scenario-icon{
  width:40px;height:40px;border-radius:10px;
  background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:17px;margin-bottom:14px;
}
.scenario-card h3{font-size:16px;font-weight:600;margin-bottom:6px}
.scenario-card p{font-size:14px;line-height:22px;color:var(--text-secondary)}

/* ===== Security Banner ===== */
.security-banner{
  display:flex;align-items:flex-start;gap:18px;
  background:linear-gradient(135deg,#EFF4FF,#F8FAFF);
  border:1px solid #C7D9FF;border-radius:var(--radius);
  padding:28px;margin:0;
}
.security-banner .sec-icon{
  flex-shrink:0;width:48px;height:48px;border-radius:50%;
  background:var(--success);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:20px;
}
.security-banner h3{font-size:18px;font-weight:600;margin-bottom:8px}
.security-banner p{font-size:14px;line-height:24px;color:var(--text-secondary);max-width:760px}
.security-banner p strong{color:var(--text)}

/* ===== FAQ ===== */
.faq-section{background:#fff;border-top:1px solid var(--border)}
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.faq-item{
  background:var(--bg);border:1px solid var(--border);
  border-radius:var(--radius);transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item.active{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.06)}
.faq-question{
  width:100%;display:flex;align-items:center;gap:12px;
  padding:18px 20px;text-align:left;
  font-size:16px;font-weight:500;color:var(--text);line-height:24px;
  transition:color .2s ease;
}
.faq-q-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:var(--primary);color:#fff;font-size:13px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.faq-question .faq-plus{
  margin-left:auto;color:var(--text-muted);font-size:14px;
  transition:transform .3s ease,color .2s ease;
}
.faq-item.active .faq-question{color:var(--primary)}
.faq-item.active .faq-plus{transform:rotate(45deg);color:var(--primary)}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease-out;
}
.faq-item.active .faq-answer{max-height:300px}
.faq-answer p{
  padding:0 20px 20px 58px;
  font-size:14px;line-height:24px;color:#475569;
}
.faq-more{
  display:inline-flex;align-items:center;gap:8px;margin-top:24px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.faq-more i{transition:transform .2s ease}
.faq-more:hover i{transform:translateX(4px)}

/* ===== CTA Band ===== */
.cta-band{
  background:var(--primary);padding:64px 0;
  border-radius:0;
}
.cta-band .container{
  display:flex;flex-direction:column;align-items:center;text-align:center;
}
.cta-band h2{
  font-size:26px;line-height:36px;font-weight:700;color:#fff;margin-bottom:10px;
}
.cta-band p{
  font-size:14px;line-height:24px;color:rgba(255,255,255,.75);
  max-width:560px;margin-bottom:28px;
}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

/* ===== Footer ===== */
.site-footer{background:#1E293B;color:#CBD5E1;margin-top:0}
.site-footer .container{padding-top:56px;padding-bottom:28px}
.footer-top{
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:32px;
  padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand .footer-logo{
  display:flex;align-items:center;gap:10px;margin-bottom:16px;
}
.footer-logo .logo-icon{
  background:rgba(37,99,235,.2);color:#fff;
}
.footer-logo .logo-text{color:#fff;font-size:18px;font-weight:600}
.footer-logo .logo-text b{color:#93B4FF}
.footer-brand p{
  font-size:13px;line-height:22px;color:#94A3B8;max-width:300px;
}
.footer-col h4{
  color:#fff;font-size:14px;font-weight:600;margin-bottom:14px;
}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:9px}
.footer-col a{
  color:#94A3B8;font-size:13px;line-height:20px;
}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;padding-top:24px;
  font-size:12px;color:#64748B;
}
.footer-legal{display:flex;align-items:center;gap:12px}
.footer-legal a{color:#64748B}
.footer-legal a:hover{color:#CBD5E1}

/* ===== Mobile Bottom Tab ===== */
.mobile-tab{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:100;
  background:#fff;border-top:1px solid var(--border);
  height:60px;padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -2px 12px rgba(15,23,42,.06);
}
.mobile-tab .tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:4px;color:var(--text-muted);font-size:12px;height:100%;
}
.mobile-tab .tab-item i{font-size:20px}
.mobile-tab .tab-item.active{color:var(--primary)}
.mobile-tab .tab-item span{line-height:1}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .container{padding:0 24px}
  .main-nav a{padding:8px 10px;font-size:14px}
  .header-cta .btn{padding:9px 16px;font-size:15px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .header-cta .btn{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .service-card-wide{grid-column:span 2}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .scenarios-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:span 2;max-width:400px}
}
@media (max-width:767px){
  :root{--space-section:40px;--space-card:16px}
  .container{padding:0 16px}
  .cat-hero{padding:48px 0 40px}
  .cat-hero h1{font-size:26px;line-height:36px}
  .cat-hero .lead{font-size:15px}
  .cat-hero-stats{gap:14px;flex-direction:column}
  .category-tabs{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
  .category-tabs::-webkit-scrollbar{display:none}
  .category-tabs a{white-space:nowrap;flex-shrink:0}
  .service-grid{grid-template-columns:1fr}
  .service-card-wide{grid-column:span 1;grid-template-columns:1fr}
  .service-card-wide .wide-media{order:-1;min-height:150px}
  .steps-grid{grid-template-columns:1fr}
  .scenarios-grid{grid-template-columns:1fr}
  .security-banner{flex-direction:column;padding:20px}
  .faq-grid{grid-template-columns:1fr}
  .cta-band{padding:48px 0}
  .cta-band h2{font-size:22px;line-height:32px}
  .site-footer .container{padding-top:40px}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .footer-brand{grid-column:span 1}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding-bottom:76px}
  .mobile-tab{display:flex}
  .header-inner{height:64px}
  .mobile-menu{top:64px}
  .header-cta .login-link{font-size:14px}
}
@media (max-width:520px){
  .logo-text{font-size:15px}
  .logo-icon{width:34px;height:34px;font-size:17px}
  .btn{padding:9px 18px;font-size:15px}
  .cat-hero h1{font-size:23px;line-height:34px}
  .section-head h2{font-size:22px;line-height:32px}
  .faq-question{font-size:15px;padding:16px 14px;gap:8px}
  .faq-answer p{padding:0 14px 16px 44px;font-size:13px}
}