:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f4f7ff;
      --text:#132033;
      --muted:#5e6b84;
      --line:#dbe3f2;
      --brand:#3a5bff;
      --brand-2:#8b5cf6;
      --accent:#00c2ff;
      --accent-2:#20d6a2;
      --shadow:0 18px 40px rgba(27,44,84,.10);
      --shadow-soft:0 10px 24px rgba(27,44,84,.08);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(58,91,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(0,194,255,.12), transparent 24%),
        linear-gradient(180deg,#f8fbff 0%, #f6f8fc 45%, #f7f9ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(18px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(219,227,242,.8);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:18px;
      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; box-shadow:var(--shadow-soft); padding:4px}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:18px; letter-spacing:.2px}
    .brand-text span{display:block; font-size:12px; color:var(--muted); margin-top:3px}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:12px; padding:10px 12px; cursor:pointer;
    }
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:#33415c; padding:8px 10px; border-radius:10px}
    .nav-links a:hover{background:#eef3ff; color:var(--brand)}
    .top-actions{display:flex; gap:10px; align-items:center}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border-radius:14px; padding:12px 18px; border:1px solid transparent;
      font-weight:700; cursor:pointer; transition:.25s ease; white-space:nowrap;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff; box-shadow:0 14px 28px rgba(58,91,255,.24);
    }
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 18px 32px rgba(58,91,255,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{border-color:#b9c6e4; transform:translateY(-1px)}
    .hero{
      padding:36px 0 24px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.25fr .75fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.quote,.faq-item,.form-wrap{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(219,227,242,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{
      padding:34px; position:relative; overflow:hidden;
      background:
        radial-gradient(circle at 15% 20%, rgba(0,194,255,.12), transparent 18%),
        radial-gradient(circle at 85% 18%, rgba(139,92,246,.12), transparent 16%),
        linear-gradient(180deg, rgba(255,255,255,.96), rgba(244,247,255,.96));
    }
    .hero-main:before,.hero-main:after{
      content:""; position:absolute; border-radius:999px; filter:blur(2px); pointer-events:none;
    }
    .hero-main:before{width:180px;height:180px; right:-56px; top:-46px; background:radial-gradient(circle, rgba(0,194,255,.36), transparent 66%)}
    .hero-main:after{width:220px;height:220px; right:84px; bottom:-120px; background:radial-gradient(circle, rgba(58,91,255,.18), transparent 70%)}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; background:#eef4ff; color:#2440b9; border:1px solid #d8e4ff; border-radius:999px; padding:8px 12px; font-size:13px; font-weight:700}
    h1{margin:16px 0 12px; font-size:clamp(30px,5vw,52px); line-height:1.08; letter-spacing:-.5px}
    .hero-main p{margin:0; color:var(--muted); font-size:16px; line-height:1.8; max-width:60ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-badges{display:flex; flex-wrap:wrap; gap:10px; margin-top:18px}
    .chip{padding:8px 12px; border-radius:999px; background:#f2f6ff; border:1px solid #dce5f8; color:#33415c; font-size:13px}
    .hero-stats{
      display:grid; grid-template-columns:repeat(2,1fr); gap:12px; margin-top:22px;
    }
    .stat{
      padding:16px; border-radius:18px; background:rgba(255,255,255,.78); border:1px solid #e4ebf8;
    }
    .stat strong{display:block; font-size:24px; color:#15213a}
    .stat span{display:block; margin-top:4px; font-size:13px; color:var(--muted)}
    .hero-side{padding:18px; display:flex; flex-direction:column; gap:14px}
    .hero-side .side-head{display:flex; justify-content:space-between; align-items:center}
    .side-head h2{margin:0; font-size:18px}
    .mini-list{display:grid; gap:12px}
    .mini-item{
      padding:14px; border-radius:16px; background:#f7faff; border:1px solid #e2e8f7;
    }
    .mini-item strong{display:block; margin-bottom:6px}
    .mini-item p{margin:0; color:var(--muted); font-size:14px; line-height:1.65}
    .section{padding:18px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:14px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); line-height:1.7; max-width:68ch}
    .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{padding:20px}
    .card h3{margin:10px 0 8px; font-size:18px}
    .card p, .card li{color:var(--muted); line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(58,91,255,.13), rgba(0,194,255,.13));
      color:var(--brand); font-weight:800;
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#31415d; font-size:13px}
    .workflow{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step{
      padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff,#f5f8ff); border:1px solid #e2e8f7; position:relative;
    }
    .step b{display:inline-flex; align-items:center; justify-content:center; width:34px; height:34px; border-radius:12px; background:#0f172a; color:#fff; margin-bottom:12px}
    .compare{
      width:100%; border-collapse:separate; border-spacing:0; overflow:hidden;
      border-radius:18px; border:1px solid #dfe7f4; background:#fff;
    }
    .compare th,.compare td{padding:14px 16px; border-bottom:1px solid #edf1f7; text-align:left; vertical-align:top; font-size:14px}
    .compare th{background:#f4f7ff; color:#1b2a44}
    .compare tr:last-child td{border-bottom:none}
    .score{
      display:flex; gap:14px; align-items:center; padding:18px; border-radius:18px; background:linear-gradient(135deg,#edf4ff,#f6f1ff); border:1px solid #dbe4fb;
    }
    .score .grade{font-size:28px; font-weight:900; color:#1d2c52}
    .score .rating{font-size:15px; color:#394b6d; line-height:1.7}
    .testimonials,.articles,.faq-list,.service-network{display:grid; gap:16px}
    .quote{padding:18px}
    .quote .meta{display:flex; align-items:center; justify-content:space-between; margin-bottom:10px}
    .quote .meta strong{font-size:16px}
    .quote .meta span{font-size:13px; color:var(--muted)}
    .timeline{display:grid; gap:14px}
    .timeline-item{display:grid; grid-template-columns:74px 1fr; gap:14px; align-items:start; padding:16px 0; border-bottom:1px dashed #dbe3f2}
    .timeline-item:last-child{border-bottom:none}
    .timeline-item .date{font-weight:800; color:var(--brand)}
    .panel{padding:18px}
    .panel h3{margin:0 0 10px}
    .article-list{display:grid; gap:12px}
    .article{
      padding:14px 16px; border-radius:16px; background:#f7faff; border:1px solid #e2e8f7; display:flex; align-items:center; justify-content:space-between; gap:12px;
    }
    .article a{color:#1e3569; font-weight:700}
    .article small{color:var(--muted)}
    .faq-item{padding:0; overflow:hidden}
    .faq-q{
      width:100%; text-align:left; background:none; border:0; padding:18px 18px; color:var(--text); font-size:16px; font-weight:800; cursor:pointer; display:flex; justify-content:space-between; gap:14px;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 18px}
    .faq-a p{margin:0 0 18px; color:var(--muted); line-height:1.8}
    .faq-item.open .faq-a{max-height:180px}
    .faq-item.open .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:transform .2s ease}
    .form-wrap{padding:22px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .field{display:flex; flex-direction:column; gap:8px}
    .field label{font-size:14px; font-weight:700; color:#2d3b56}
    .field input,.field select,.field textarea{
      width:100%; border:1px solid #d8e2f1; border-radius:14px; padding:13px 14px; background:#fff; color:var(--text);
      outline:none; transition:border-color .2s, box-shadow .2s;
    }
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#8aa7ff; box-shadow:0 0 0 4px rgba(58,91,255,.10)}
    .field textarea{min-height:120px; resize:vertical}
    .form-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:14px}
    .footer{
      margin-top:24px; padding:22px 0 28px; background:#0f172a; color:#d9e3ff;
    }
    .footer a{color:#b6cdfd}
    .footer-grid{display:grid; grid-template-columns:1.25fr .75fr .75fr; gap:18px}
    .footer h3,.footer h4{margin:0 0 12px; color:#fff}
    .footer p,.footer li{color:#c4d0ee; line-height:1.75}
    .footer ul{margin:0; padding:0; list-style:none; display:grid; gap:8px}
    .social{display:flex; gap:12px; flex-wrap:wrap}
    .social a{padding:9px 12px; border-radius:12px; background:rgba(255,255,255,.08)}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:60; display:flex; flex-direction:column; gap:10px;
    }
    .floating a,.floating button{
      border:0; border-radius:999px; box-shadow:var(--shadow-soft); cursor:pointer;
      display:inline-flex; align-items:center; gap:8px; padding:12px 14px; font-weight:700;
    }
    .floating .chat{background:linear-gradient(135deg,var(--accent-2),#52d6ff); color:#06201a}
    .floating .top{background:#fff; color:#23304a; border:1px solid var(--line)}
    .reveal{opacity:0; transform:translateY(18px); transition:.6s ease}
    .reveal.in{opacity:1; transform:none}
    .image-row{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .image-row img,.thumb img{border-radius:18px; border:1px solid #e2e8f7; background:#fff}
    .thumb{display:grid; gap:12px}
    .table-scroll{overflow:auto}
    @media (max-width: 1080px){
      .hero-grid,.grid-4,.grid-3,.workflow,.footer-grid,.image-row{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 768px){
      .nav-toggle{display:inline-flex}
      .nav-links{display:none; width:100%; padding:12px 0 0}
      .nav-links.show{display:flex; flex-direction:column; align-items:flex-start}
      .nav{flex-wrap:wrap}
      .top-actions{width:100%; justify-content:flex-start}
      .hero-grid,.grid-4,.grid-3,.workflow,.footer-grid,.image-row,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .section-head{flex-direction:column; align-items:flex-start}
      .compare th,.compare td{white-space:nowrap}
    }