:root{--bg:#eef4ff;--card:#ffffff;--line:#d8e3f6;--text:#15304f;--muted:#5d6f88;--primary:#0b4db8;--primary2:#2a7bff;--accent:#00a3ff;--shadow:0 18px 50px rgba(19,56,119,.12);--radius:22px}
    *{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#f9fbff 0,#eef4ff 35%,#eaf2ff 100%);color:var(--text)}
    a{color:var(--primary);text-decoration:none} img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(239,244,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(216,227,246,.9)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 18px rgba(11,77,184,.12)}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px}
    .menu{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:14px;color:#27415f;padding:8px 10px;border-radius:999px}
    .menu a:hover{background:#e7f0ff;color:var(--primary)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s ease;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(11,77,184,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover,.card:hover,.metric:hover,.service:hover,.review:hover,.case:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .hamburger{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
    main{padding-bottom:16px}
    section{padding:28px 0}
    .hero{padding:30px 0 18px}
    .hero-wrap{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-box,.info-box,.card,.metric,.service,.case,.review,.faq-item,.timeline-item,.price-box,.form-box,.aside-box{background:rgba(255,255,255,.92);border:1px solid rgba(216,227,246,.95);border-radius:var(--radius);box-shadow:0 12px 30px rgba(32,60,108,.08)}
    .hero-box{padding:28px;position:relative;overflow:hidden}
    .hero-box:before,.hero-box:after{content:"";position:absolute;border-radius:50%;background:radial-gradient(circle,rgba(42,123,255,.18),transparent 62%)}
    .hero-box:before{width:260px;height:260px;right:-90px;top:-90px}
    .hero-box:after{width:180px;height:180px;right:120px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eaf3ff;color:var(--primary);font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.05;letter-spacing:-.02em}
    .lead{font-size:17px;line-height:1.85;color:#35506e;max-width:58ch;margin:0 0 20px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
    .point{padding:14px 14px;border-radius:18px;background:#f5f8ff;border:1px solid #dde8fb}
    .point strong{display:block;font-size:18px;color:var(--primary);margin-bottom:4px}
    .point span{color:var(--muted);font-size:13px}
    .hero-side{display:grid;gap:14px}
    .promo{padding:20px}
    .promo h3,.section-title h2{margin:0 0 8px;font-size:26px}
    .promo p,.section-title p{margin:0;color:var(--muted);line-height:1.8}
    .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .metric{padding:18px}
    .metric .num{font-size:28px;font-weight:800;color:var(--primary);line-height:1}
    .metric .label{margin-top:8px;color:#29455f;font-weight:700}
    .metric .desc{margin-top:6px;color:var(--muted);font-size:13px;line-height:1.6}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card,.service,.case,.review,.faq-item,.price-box,.form-box,.timeline-item,.aside-box{padding:20px}
    .card h3,.service h3,.case h3,.review h3,.price-box h3,.form-box h3,.aside-box h3{margin:0 0 10px;font-size:18px}
    .card p,.service p,.case p,.review p,.price-box p,.form-box p,.aside-box p{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .tag{padding:8px 12px;border-radius:999px;background:#eef5ff;color:#214365;border:1px solid #dbe7fb;font-size:13px}
    .section-title{margin-bottom:18px}
    .services-list{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service .icon{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#ddebff,#ffffff);display:grid;place-items:center;color:var(--primary);font-weight:800;margin-bottom:12px}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
    .step{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid #dbe6f9}
    .step .idx{display:inline-flex;width:32px;height:32px;border-radius:50%;align-items:center;justify-content:center;background:var(--primary);color:#fff;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow-x:auto;border-radius:22px;border:1px solid #dbe6f9;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid #e8eef8;vertical-align:top}
    th{background:#f4f8ff;color:#183554}
    tr:last-child td{border-bottom:none}
    .rating{font-size:18px;color:#f5a623;font-weight:800}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .stars{color:#f5a623;font-weight:800}
    .faq-item summary{cursor:pointer;font-weight:700;color:#173857;list-style:none}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{margin-top:12px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .price-box .price{font-size:30px;color:var(--primary);font-weight:900;margin:8px 0}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article a{display:inline-flex;margin-top:12px;font-weight:700}
    .form{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    input,select,textarea{width:100%;border:1px solid #cfdcf0;border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text)}
    textarea{min-height:132px;resize:vertical}
    label{font-size:14px;font-weight:700;color:#23415e}
    .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    footer{margin-top:18px;background:#0d2b66;color:#d8e7ff;padding:28px 0 18px}
    footer a{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:16px}
    .footer-box p,.footer-box li{color:#d8e7ff;line-height:1.8}
    .footer-box ul{margin:0;padding-left:18px}
    .subfooter{margin-top:16px;padding-top:14px;border-top:1px solid rgba(255,255,255,.16);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#d8e7ff}
    .float-tools{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:60}
    .tool{width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 28px rgba(11,77,184,.25);border:none;cursor:pointer}
    .tool.secondary{background:#fff;color:var(--primary);border:1px solid var(--line)}
    .mobile-menu{display:none}
    .fade-in{opacity:0;transform:translateY(16px);transition:.6s ease}
    .fade-in.show{opacity:1;transform:none}
    .home-link{font-weight:800}
    .qr{display:flex;align-items:center;gap:14px}
    .qr img{width:116px;border-radius:18px;border:1px solid #dce7f8;background:#fff;padding:8px}
    @media (max-width: 1024px){
      .hero-wrap,.form,.footer-grid,.support-grid,.grid-3,.grid-2,.services-list,.articles,.timeline,.stats,.hero-points{grid-template-columns:1fr 1fr}
      .steps{grid-template-columns:1fr 1fr 1fr}
    }
    @media (max-width: 760px){
      .menu,.nav-actions{display:none}
      .hamburger{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 14px}
      .mobile-menu.open{display:block}
      .mobile-menu a{display:block;padding:12px 2px;border-top:1px solid #dbe6f9;color:#203b58}
      .hero-wrap,.form,.footer-grid,.support-grid,.grid-3,.grid-2,.services-list,.articles,.timeline,.stats,.hero-points,.steps{grid-template-columns:1fr}
      .hero-box{padding:22px}
      .lead{font-size:16px}
      .float-tools{right:12px;bottom:12px}
    }