:root{--bg:#f5f8fc;--card:#ffffff;--card2:#f8fbff;--text:#182434;--muted:#5b6b7f;--line:#dbe5f1;--brand:#3a63ff;--brand2:#14c7ff;--brand3:#9b7bff;--shadow:0 18px 50px rgba(31,58,138,.12);--radius:20px}
    *{box-sizing:border-box} html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,rgba(20,199,255,.12),transparent 28%),radial-gradient(circle at top right,rgba(155,123,255,.12),transparent 24%),linear-gradient(180deg,#f8fbff 0%,#f5f8fc 100%);color:var(--text)}
    a{color:var(--brand);text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:30;background:rgba(245,248,252,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,229,241,.8)}
    .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 img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 24px rgba(58,99,255,.12)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
    .nav-links a{font-size:13px;padding:8px 11px;border-radius:999px;color:var(--text)}
    .nav-links a:hover,.nav-links a.active{background:linear-gradient(135deg,rgba(58,99,255,.12),rgba(20,199,255,.12));color:#1842da}
    .top-cta{display:flex;gap:10px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:14px;padding:12px 16px;font-weight:700;cursor:pointer;transition:.22s ease;box-shadow:0 12px 30px rgba(58,99,255,.18)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line);box-shadow:none}
    .btn:hover{transform:translateY(-2px)}
    main{padding-bottom:20px}
    section{padding:26px 0}
    .hero{padding:30px 0 14px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:22px;align-items:stretch}
    .hero-card{position:relative;overflow:hidden;border-radius:28px;background:linear-gradient(135deg,#09142b 0%,#142d68 45%,#1c5fff 100%);color:#fff;padding:34px;box-shadow:var(--shadow)}
    .hero-card::before,.hero-card::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.08);filter:blur(4px)}
    .hero-card::before{width:220px;height:220px;right:-70px;top:-70px}
    .hero-card::after{width:160px;height:160px;left:54%;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);font-size:13px}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,54px);line-height:1.06}
    .hero p{margin:0;color:rgba(255,255,255,.86);font-size:16px;line-height:1.8;max-width:64ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .mini-stat{padding:14px;border-radius:18px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.12)}
    .mini-stat b{display:block;font-size:20px;margin-bottom:6px}
    .side-card{border-radius:28px;background:linear-gradient(180deg,#ffffff 0%,#f7fbff 100%);border:1px solid var(--line);box-shadow:var(--shadow);padding:20px}
    .side-card h3{margin:0 0 8px;font-size:18px}
    .side-card p,.side-card li{color:var(--muted);line-height:1.75}
    .badge-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
    .tag{padding:7px 10px;border-radius:999px;background:linear-gradient(135deg,rgba(58,99,255,.08),rgba(20,199,255,.08));border:1px solid rgba(58,99,255,.12);color:#2850c7;font-size:12px}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:16px}
    .section-title h2{margin:0;font-size:28px}
    .section-title p{margin:0;color:var(--muted)}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{background:linear-gradient(180deg,#fff, #f9fcff);border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:0 10px 28px rgba(25,48,87,.06);transition:.22s ease}
    .card:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(25,48,87,.11)}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p,.card li{margin:0;color:var(--muted);line-height:1.75}
    .metric{display:flex;flex-direction:column;gap:8px}
    .metric strong{font-size:28px;color:#1b2f55}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(58,99,255,.12),rgba(20,199,255,.16));color:#2446b6;font-weight:800;margin-bottom:10px}
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative;padding:18px 16px 16px 18px;background:#fff;border:1px solid var(--line);border-radius:22px}
    .step:after{content:"";position:absolute;right:-18px;top:50%;width:20px;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transform:translateY(-50%)}
    .step:last-child:after{display:none}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:700;margin-bottom:10px}
    .compare-wrap,.faq-wrap{background:rgba(255,255,255,.7);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);padding:18px}
    table{width:100%;border-collapse:collapse;overflow:hidden}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f2f7ff;color:#20324d;font-size:14px}
    td{color:var(--muted)}
    .table-scroller{overflow:auto}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px}
    details+details{margin-top:12px}
    summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700;color:var(--text)}
    summary::-webkit-details-marker{display:none}
    details p{padding:0 0 16px;margin:0;color:var(--muted);line-height:1.8}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{position:relative}
    .quote .who{display:flex;align-items:center;gap:10px;margin-top:14px}
    .avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,rgba(58,99,255,.18),rgba(155,123,255,.18))}
    .article-list,.link-cloud,.service-net{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article-list a,.link-cloud a{display:block;padding:14px 16px;border-radius:18px;border:1px solid var(--line);background:#fff;color:var(--text)}
    .link-cloud a{font-size:13px}
    .timeline{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .timeline .card{position:relative;padding-left:22px}
    .timeline .card::before{content:"";position:absolute;left:0;top:24px;bottom:24px;width:4px;border-radius:999px;background:linear-gradient(180deg,var(--brand),var(--brand2))}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    form{background:#fff;border:1px solid var(--line);border-radius:26px;padding:20px;box-shadow:var(--shadow)}
    label{display:block;font-size:14px;color:#324255;margin-bottom:8px}
    input,select,textarea{width:100%;border:1px solid #ced9e8;border-radius:14px;padding:12px 14px;font:inherit;color:var(--text);background:#fbfdff;outline:none}
    input:focus,select:focus,textarea:focus{border-color:#63a0ff;box-shadow:0 0 0 4px rgba(58,99,255,.08)}
    textarea{min-height:126px;resize:vertical}
    .footer{background:#091424;color:#dbe6f7;padding:26px 0 20px;margin-top:10px}
    .footer a{color:#89c7ff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:16px}
    .footer .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.08);box-shadow:none}
    .floating{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:10px;z-index:40}
    .floating a,.floating button{width:52px;height:52px;border-radius:18px;border:none;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;display:grid;place-items:center;box-shadow:0 14px 32px rgba(58,99,255,.24);cursor:pointer}
    .floating .secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .scrollup{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}
    .scrollup.show{opacity:1;pointer-events:auto;transform:none}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    .mobile-only{display:none}
    .split{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .compare-card{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .rating{font-size:34px;font-weight:800;color:#17316a}
    .price-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .price{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px}
    .price b{display:block;font-size:18px;margin-bottom:6px}
    .soft{color:var(--muted)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.flow,.quote-grid,.article-list,.link-cloud,.service-net,.footer-grid,.timeline,.split,.form-grid,.compare-card,.price-row{grid-template-columns:1fr}
      .step:after{display:none}
      .menu-btn{display:inline-flex}
      .nav-links{display:none;width:100%;padding-top:10px}
      .nav-links.open{display:flex}
      .nav{flex-wrap:wrap}
      .top-cta{display:none}
      .mobile-only{display:flex}
    }