:root{
      --bg:#f6f8fc;
      --card:#ffffff;
      --card2:#f2f6ff;
      --text:#162033;
      --muted:#5e6b84;
      --line:#dce5f3;
      --brand:#1a63ff;
      --brand2:#6a5cff;
      --accent:#00c2ff;
      --warm:#ff7a59;
      --shadow:0 18px 40px rgba(17, 34, 68, .09);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(26,99,255,.12), transparent 28%),
        radial-gradient(circle at 85% 10%, rgba(0,194,255,.10), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, #f3f7fd 40%, #f7f9fd 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:var(--brand); text-decoration:none}
    img{display:block; max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(16px);
      background: rgba(250,252,255,.82);
      border-bottom:1px solid rgba(220,229,243,.72);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:76px;
    }
    .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; box-shadow:0 8px 18px rgba(26,99,255,.14)}
    .brand h2{margin:0; font-size:18px; letter-spacing:.5px}
    .brand span{display:block; font-size:12px; color:var(--muted); margin-top:2px}
    .navlinks{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .navlinks a{font-size:14px; color:var(--text); padding:8px 10px; border-radius:999px}
    .navlinks a:hover,.navlinks a:focus{background:rgba(26,99,255,.08); color:var(--brand)}
    .nav-cta{
      display:flex; align-items:center; gap:10px;
    }
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:0; border-radius:999px; padding:12px 18px;
      font-weight:700; cursor:pointer; transition:.25s ease;
      box-shadow: var(--shadow);
      white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg, var(--brand), var(--brand2)); color:#fff}
    .btn-ghost{background:#fff; color:var(--text); border:1px solid var(--line); box-shadow:none}
    .btn:hover{transform:translateY(-2px)}
    .menu-btn{display:none; background:#fff; border:1px solid var(--line); border-radius:14px; width:44px; height:44px}
    .hero{
      position:relative;
      padding:58px 0 28px;
      overflow:hidden;
    }
    .hero::before,.hero::after{
      content:""; position:absolute; inset:auto;
      border-radius:50%;
      pointer-events:none;
      filter:blur(4px);
    }
    .hero::before{width:320px; height:320px; right:-110px; top:10px; background:radial-gradient(circle, rgba(26,99,255,.18), transparent 68%)}
    .hero::after{width:220px; height:220px; left:-80px; bottom:-60px; background:radial-gradient(circle, rgba(0,194,255,.13), transparent 70%)}
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:26px; align-items:stretch;
    }
    .hero-copy,.hero-panel,.card,.info-panel,.faq-item,.review-card,.case-card,.article-card,.timeline-item,.service-card,.compare-card,.network-card,.pricing-card,.form-card,.about-card{
      background:rgba(255,255,255,.84);
      border:1px solid rgba(220,229,243,.92);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      padding:7px 12px; border-radius:999px;
      background:rgba(26,99,255,.08); color:var(--brand); font-weight:700; font-size:13px;
    }
    h1{margin:18px 0 14px; font-size:clamp(32px, 5vw, 54px); line-height:1.1}
    .lead{font-size:17px; color:var(--muted); margin:0 0 22px; max-width:44rem}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin:20px 0 24px}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:14px}
    .point{
      padding:14px; border-radius:18px; background:linear-gradient(180deg, #fff, #f5f8ff); border:1px solid var(--line);
    }
    .point b{display:block; font-size:20px; margin-bottom:2px}
    .point span{font-size:13px; color:var(--muted)}
    .hero-panel{padding:24px; position:relative; overflow:hidden}
    .hero-panel::before{
      content:""; position:absolute; inset:0;
      background:linear-gradient(135deg, rgba(26,99,255,.08), rgba(0,194,255,.04), transparent 70%);
      pointer-events:none;
    }
    .panel-title{margin:0 0 14px; font-size:18px}
    .model-cloud{display:flex; flex-wrap:wrap; gap:10px; position:relative}
    .tag{
      display:inline-flex; align-items:center; gap:6px;
      padding:9px 12px; background:#fff; border:1px solid var(--line);
      border-radius:999px; font-size:13px; color:#24324a;
    }
    .metric-grid{
      display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin:22px 0 0;
    }
    .metric{
      padding:20px; position:relative; overflow:hidden;
    }
    .metric strong{display:block; font-size:28px; line-height:1.1}
    .metric p{margin:8px 0 0; color:var(--muted); font-size:14px}
    .section{padding:22px 0}
    .section-head{display:flex; align-items:flex-end; justify-content:space-between; gap:18px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); max-width:58ch}
    .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{padding:22px}
    .service-card h3,.case-card h3,.article-card h3,.compare-card h3,.form-card h3{margin:0 0 10px; font-size:20px}
    .service-card p,.case-card p,.article-card p,.compare-card p,.form-card p,.review-card p,.about-card p{margin:0; color:var(--muted)}
    .icon-badge{
      width:46px; height:46px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(26,99,255,.12), rgba(0,194,255,.10));
      color:var(--brand); font-weight:800; margin-bottom:14px;
    }
    .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step{padding:22px}
    .step .num{font-size:13px; color:var(--brand); font-weight:800; letter-spacing:.08em}
    .step h3{margin:8px 0 10px; font-size:18px}
    .table-wrap{overflow-x:auto; border-radius:18px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow)}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:16px 14px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f5f8ff; font-size:14px}
    td{font-size:14px; color:#20304b}
    .badge{display:inline-flex; align-items:center; padding:6px 10px; border-radius:999px; font-size:12px; font-weight:700}
    .badge.ok{background:rgba(32,201,151,.12); color:#117a57}
    .badge.info{background:rgba(26,99,255,.10); color:var(--brand)}
    .badge.warn{background:rgba(255,122,89,.12); color:#c14b2a}
    .compare-card .score{
      display:flex; gap:12px; align-items:center; flex-wrap:wrap; margin:14px 0 16px;
    }
    .star{color:#ffb400; letter-spacing:2px; font-size:20px}
    .timeline{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .timeline-item{padding:20px; position:relative}
    .timeline-item::before{
      content:""; position:absolute; left:20px; top:18px; width:10px; height:10px; border-radius:50%; background:linear-gradient(135deg, var(--brand), var(--accent));
      box-shadow:0 0 0 6px rgba(26,99,255,.08);
    }
    .timeline-item h3{margin:18px 0 8px; font-size:18px}
    .timeline-item p{margin:0; color:var(--muted); font-size:14px}
    .faq-list{display:grid; gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; background:none; border:0; padding:18px 20px; text-align:left;
      display:flex; align-items:center; justify-content:space-between; gap:16px; cursor:pointer;
      color:var(--text); font-size:16px; font-weight:700;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 20px}
    .faq-a p{margin:0 0 18px; color:var(--muted)}
    .faq-item.active .faq-a{max-height:180px}
    .review-grid,.article-grid,.case-grid,.network-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review-card{padding:22px}
    .review-top{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px}
    .avatar{width:42px; height:42px; border-radius:50%; background:linear-gradient(135deg, rgba(26,99,255,.16), rgba(106,92,255,.14)); display:grid; place-items:center; font-weight:800; color:var(--brand)}
    .review-meta{display:flex; align-items:center; gap:10px}
    .review-card h3{margin:0; font-size:16px}
    .review-card small{color:var(--muted)}
    .article-card,.case-card{padding:20px}
    .article-card .meta,.case-card .meta,.about-card .meta{font-size:13px; color:var(--muted); margin-top:10px}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud .tag{background:#fff}
    .pricing-grid{display:grid; grid-template-columns:1.15fr .85fr; gap:16px}
    .pricing-card{padding:24px}
    .pricing-list{display:grid; gap:10px; margin-top:14px}
    .pricing-row{display:flex; justify-content:space-between; gap:14px; padding:12px 14px; border:1px solid var(--line); border-radius:16px; background:#fff}
    .pricing-row span{color:var(--muted)}
    .form-wrap{display:grid; grid-template-columns:1fr 1fr; gap:16px}
    .form-card{padding:24px}
    form{display:grid; gap:12px}
    label{font-size:14px; font-weight:700; color:#23324b}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px;
      font:inherit; background:#fff; color:var(--text); outline:none;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(26,99,255,.55); box-shadow:0 0 0 4px rgba(26,99,255,.10)}
    textarea{min-height:120px; resize:vertical}
    .contact-box{
      padding:22px; background:linear-gradient(180deg, rgba(26,99,255,.08), rgba(255,255,255,.92)); border-radius:var(--radius);
      border:1px solid rgba(220,229,243,.92);
    }
    .contact-list{display:grid; gap:12px; margin-top:14px}
    .contact-item{padding:14px 16px; background:#fff; border:1px solid var(--line); border-radius:16px}
    .footer{
      margin-top:20px; padding:26px 0 28px;
      background:#0f1a2f; color:#e6eefc;
    }
    .footer a{color:#9fd4ff}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px; align-items:start}
    .footer h3,.footer h4{margin:0 0 12px}
    .footer p,.footer li{color:#c8d6ee}
    .footer ul{margin:0; padding:0; list-style:none; display:grid; gap:8px}
    .footer .brand h2,.footer .brand span{color:#fff}
    .copyright{margin-top:18px; padding-top:18px; border-top:1px solid rgba(255,255,255,.12); font-size:13px; color:#bfd1ec}
    .floating{
      position:fixed; right:16px; bottom:18px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:16px; border:0; cursor:pointer; color:#fff;
      background:linear-gradient(135deg, var(--brand), var(--brand2)); box-shadow:var(--shadow);
    }
    .float-link{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center;
      background:#fff; border:1px solid var(--line); box-shadow:var(--shadow);
      color:var(--brand); font-weight:800;
    }
    .mobile-drawer{display:none}
    .scroll-reveal{opacity:0; transform:translateY(16px); transition:opacity .55s ease, transform .55s ease}
    .scroll-reveal.show{opacity:1; transform:none}
    .split-note{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px}
    .mini{font-size:13px; color:var(--muted)}
    @media (max-width: 1024px){
      .hero-grid,.pricing-grid,.form-wrap,.footer-grid,.grid-3,.grid-2,.review-grid,.article-grid,.case-grid,.network-grid,.timeline,.steps,.metric-grid{grid-template-columns:1fr 1fr}
      .hero-copy{padding:28px}
    }
    @media (max-width: 760px){
      .navlinks,.nav-cta .btn-ghost{display:none}
      .menu-btn{display:inline-grid; place-items:center}
      .mobile-drawer{
        display:none; padding:0 0 14px;
      }
      .mobile-drawer.open{display:block}
      .mobile-drawer a{display:block; padding:10px 0; color:var(--text); border-top:1px solid var(--line)}
      .hero{padding-top:28px}
      .hero-grid,.pricing-grid,.form-wrap,.footer-grid,.grid-3,.grid-2,.review-grid,.article-grid,.case-grid,.network-grid,.timeline,.steps,.metric-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .brand h2{font-size:16px}
      .hero-copy,.hero-panel,.card,.info-panel,.faq-item,.review-card,.case-card,.article-card,.timeline-item,.service-card,.compare-card,.network-card,.pricing-card,.form-card,.about-card{border-radius:20px}
    }