:root{
      --bg:#f6fbff;
      --panel:#ffffff;
      --panel2:#f9f4ea;
      --line:#dbe8f4;
      --text:#17314f;
      --muted:#5d7288;
      --brand:#1f7ae0;
      --brand2:#17b7c9;
      --accent:#ff8a34;
      --ok:#20b26b;
      --shadow:0 14px 34px rgba(31,122,224,.12);
      --shadow2:0 10px 24px rgba(23,49,79,.08);
      --radius:20px;
      --radius2:28px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 10%, rgba(31,122,224,.10), transparent 22%),
        radial-gradient(circle at 90% 8%, rgba(23,183,201,.10), transparent 20%),
        linear-gradient(180deg,#f9fcff 0%, #f5f8fc 38%, #f8fbff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-shell{position:relative;overflow:hidden}
    .site-shell::before,.site-shell::after{
      content:"";position:fixed;inset:auto;pointer-events:none;border-radius:50%;
      filter:blur(20px);opacity:.35;z-index:0
    }
    .site-shell::before{width:240px;height:240px;left:-80px;top:140px;background:rgba(31,122,224,.12)}
    .site-shell::after{width:260px;height:260px;right:-90px;top:540px;background:rgba(255,138,52,.12)}
    header,main,footer{position:relative;z-index:1}
    .topbar{
      position:sticky;top:0;z-index:30;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(246,251,255,.82);
      border-bottom:1px solid rgba(219,232,244,.9);
    }
    .nav-wrap{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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:5px;box-shadow:var(--shadow2)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:14px;padding:10px 12px;font-weight:700}
    .nav{
      display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav a{
      font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px;
      transition:.2s ease;background:transparent
    }
    .nav a:hover{background:rgba(31,122,224,.08);color:var(--brand)}
    .nav .cta{
      background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; box-shadow:0 10px 20px rgba(31,122,224,.22)
    }
    .nav .cta:hover{transform:translateY(-1px);background:linear-gradient(135deg,#1668c8,#12a7bb);color:#fff}
    .hero{padding:28px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.section,.price-box,.quote,.faq-item,.form-box,.review,.case,.metric,.compare,.timeline-item,.article,.contact-panel{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(219,232,244,.95);
      border-radius:var(--radius2);
      box-shadow:var(--shadow2)
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::after{
      content:"";position:absolute;inset:auto -40px -30px auto;width:220px;height:220px;border-radius:40% 60% 45% 55%;
      background:linear-gradient(135deg, rgba(31,122,224,.16), rgba(23,183,201,.10));
      transform:rotate(18deg)
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(31,122,224,.08);color:var(--brand);font-weight:700;font-size:13px}
    h1{margin:18px 0 14px;font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0 0 18px;font-size:16px;line-height:1.8;color:var(--muted);max-width:54ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;font-size:14px;
      transition:.22s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 22px rgba(31,122,224,.22)}
    .btn-primary:hover{transform:translateY(-2px);filter:saturate(1.05)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:#b9d3ea;box-shadow:var(--shadow)}
    .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;position:relative;z-index:1}
    .tag{padding:9px 12px;border-radius:999px;background:#f2f8ff;border:1px solid #dce9f6;color:#1d486c;font-size:13px}
    .hero-side{padding:24px}
    .mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff)}
    .metric strong{display:block;font-size:22px;line-height:1;color:var(--text)}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.5}
    .side-callout{margin-top:14px;padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(255,138,52,.10), rgba(31,122,224,.08));border:1px solid rgba(255,138,52,.14)}
    .side-callout h3{margin:0 0 8px;font-size:16px}
    .side-callout p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .section{padding:26px;margin-top:18px}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:18px;flex-wrap:wrap}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:70ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .card{padding:18px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:12px;
      background:linear-gradient(135deg, rgba(31,122,224,.12), rgba(23,183,201,.12));color:var(--brand);font-weight:900
    }
    .flow{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fcff);border:1px solid var(--line)}
    .step b{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:10px;background:rgba(31,122,224,.08);color:var(--brand);margin-bottom:10px}
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:780px;background:#fff}
    th,td{padding:14px 16px;border-bottom:1px solid #edf3f8;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f7fbff;color:#28455f}
    tr:last-child td{border-bottom:none}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700}
    .badge.ok{background:rgba(32,178,107,.10);color:#1b8450}
    .badge.warn{background:rgba(255,138,52,.12);color:#b25a11}
    .compare-top{display:grid;grid-template-columns:1fr .9fr;gap:14px;align-items:start}
    .score-box{padding:22px;border-radius:22px;background:linear-gradient(135deg, rgba(31,122,224,.10), rgba(23,183,201,.08));border:1px solid rgba(31,122,224,.12)}
    .score-box .stars{font-size:26px;letter-spacing:3px;color:#ffb11f}
    .score-box strong{display:block;font-size:44px;line-height:1;margin:10px 0 8px}
    .score-box p{margin:0;color:var(--muted);line-height:1.75}
    .review-grid,.case-grid,.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{padding:18px}
    .review .who{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .review .who strong{font-size:16px}
    .review .stars{color:#ffb11f;font-size:15px}
    .review p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .case{padding:18px;display:flex;flex-direction:column;gap:10px}
    .case .cover{
      border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#f7fbff
    }
    .case .cover img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .case ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.8;font-size:14px}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:transparent;border:none;color:var(--text);
      display:flex;justify-content:space-between;align-items:center;text-align:left;font-size:16px;font-weight:700;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;border-top:1px solid transparent}
    .faq-a p{margin:0;padding:0 20px 18px;color:var(--muted);line-height:1.8;font-size:14px}
    .faq-item.open .faq-a{max-height:220px;border-top-color:var(--line)}
    .faq-item.open .faq-a p{padding-top:16px}
    .faq-item.open .faq-q .chev{transform:rotate(180deg)}
    .chev{transition:transform .2s ease}
    .form-box{padding:22px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1 / -1}
    label{font-size:14px;font-weight:700;color:#2a4660}
    input,select,textarea{
      width:100%;border:1px solid #dbe8f4;border-radius:14px;background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#9bc6ee;box-shadow:0 0 0 4px rgba(31,122,224,.08)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .submit-row .note{color:var(--muted);font-size:13px;line-height:1.7}
    .article{padding:18px}
    .article .meta{font-size:12px;color:var(--brand);font-weight:700;margin-bottom:8px}
    .article h3{margin:0 0 8px;font-size:17px}
    .article p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .article a{display:inline-flex;margin-top:12px;color:var(--brand);font-weight:700}
    .cloud{display:flex;flex-wrap:wrap;gap:10px}
    .cloud a{padding:9px 12px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:13px;color:#35506a}
    .cloud a:hover{border-color:#b8d8f2;transform:translateY(-1px);box-shadow:var(--shadow2)}
    .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
    .contact-panel{padding:20px}
    .contact-list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
    .contact-list li{padding:12px 14px;border-radius:14px;background:#f8fbff;border:1px solid var(--line);color:var(--text)}
    .qr{display:flex;gap:14px;align-items:center}
    .qr img{width:128px;height:128px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:16px 18px;display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start}
    .timeline-item .dot{width:12px;height:12px;border-radius:50%;margin-top:6px;background:linear-gradient(135deg,var(--brand),var(--brand2))}
    .timeline-item h3{margin:0 0 6px;font-size:16px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .footer{
      margin-top:18px;background:#eaf4ff;border-top:1px solid #d7e5f2;color:#17314f
    }
    .footer .container{padding:22px 0}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:16px}
    .footer h3{margin:0 0 10px;font-size:16px}
    .footer p,.footer a{color:#29455f;font-size:14px;line-height:1.8}
    .footer a:hover{color:var(--brand)}
    .copyright{margin-top:14px;padding-top:14px;border-top:1px solid #d7e5f2;color:#4e6780;font-size:13px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 22px rgba(31,122,224,.24);
      border:none;cursor:pointer
    }
    .float-btn:hover{transform:translateY(-2px)}
    .float-link{padding:11px 14px;border-radius:14px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow2);color:var(--text);font-weight:700}
    .fade-up{opacity:0;transform:translateY(18px);transition:all .5s ease}
    .fade-up.in{opacity:1;transform:none}
    .pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .price-box{padding:18px}
    .price-box .top{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .price-box strong{font-size:20px}
    .price-box ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.8;font-size:14px}
    .network{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .network .card{min-height:100%}
    .anchor-note{font-size:13px;color:var(--muted)}
    @media (max-width: 1024px){
      .hero-grid,.compare-top,.contact-grid,.footer-grid{grid-template-columns:1fr}
      .grid-4,.pricing,.network{grid-template-columns:repeat(2,1fr)}
      .flow{grid-template-columns:repeat(2,1fr)}
      .review-grid,.case-grid,.article-grid,.grid-3{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .nav-toggle{display:inline-flex}
      .nav{display:none;flex-direction:column;align-items:stretch;width:100%;padding:12px 0 4px}
      .nav.open{display:flex}
      .nav a{text-align:center;background:#fff;border:1px solid var(--line)}
      .nav-wrap{flex-wrap:wrap}
      .hero-main,.hero-side,.section,.form-box,.contact-panel{padding:20px}
      .hero{padding-top:18px}
      .grid-3,.grid-4,.review-grid,.case-grid,.article-grid,.pricing,.network{grid-template-columns:1fr}
      .flow{grid-template-columns:1fr}
      form{grid-template-columns:1fr}
      .submit-row{flex-direction:column;align-items:stretch}
      .submit-row .btn{width:100%}
      .qr{flex-direction:column;align-items:flex-start}
      .floating{right:12px;bottom:12px}
      .float-link{display:none}
    }