:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f1f5ff;
      --text:#172033;
      --muted:#5f6b84;
      --line:#dbe4f5;
      --brand:#4f7cff;
      --brand-2:#16c7c9;
      --accent:#9b7bff;
      --warm:#ffcc66;
      --shadow:0 18px 50px rgba(27, 50, 110, .10);
      --shadow-2:0 10px 24px rgba(31, 61, 129, .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;
      background:
        radial-gradient(circle at top left, rgba(79,124,255,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(22,199,201,.12), transparent 22%),
        linear-gradient(180deg, #f9fbff 0%, #f5f8ff 48%, #f7f8fc 100%);
      color:var(--text);
    }
    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:saturate(180%) blur(16px);
      background:rgba(246,248,252,.78);
      border-bottom:1px solid rgba(219,228,245,.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}
    .ai-page-logo{width:44px; height:44px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:var(--shadow-2)}
    .brand h2{margin:0; font-size:18px; line-height:1.1}
    .brand p{margin:4px 0 0; color:var(--muted); font-size:12px}
    .nav-toggle{display:none; border:1px solid var(--line); background:var(--panel); color:var(--text); border-radius:12px; padding:10px 12px}
    .nav-links{display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{
      padding:9px 12px; border-radius:999px; color:var(--text); font-size:14px;
      transition:.2s ease; border:1px solid transparent;
    }
    .nav-links a:hover,.nav-links a:focus{background:rgba(79,124,255,.10); border-color:rgba(79,124,255,.18); transform:translateY(-1px)}
    .nav-cta{background:linear-gradient(135deg,var(--brand),var(--accent)); color:#fff !important; box-shadow:0 10px 24px rgba(79,124,255,.24)}
    main{padding:22px 0 8px}
    section{padding:24px 0}
    .hero{
      padding:22px 0 14px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:22px; align-items:stretch;
    }
    .hero-card,.panel,.metric,.service-card,.step,.review,.case,.article,.faq-item,.contact-card,.compare,.badge-cloud,.price-box,.timeline,.network,.about-card{
      background:linear-gradient(180deg, rgba(255,255,255,.98), rgba(248,250,255,.96));
      border:1px solid rgba(219,228,245,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow-2);
    }
    .hero-card{padding:28px; position:relative; overflow:hidden}
    .hero-card::before{
      content:""; position:absolute; inset:auto -40px -80px auto; width:220px; height:220px;
      background:radial-gradient(circle, rgba(79,124,255,.16), transparent 68%);
      pointer-events:none;
    }
    .kicker{
      display:inline-flex; gap:8px; align-items:center; padding:8px 12px; border-radius:999px;
      background:rgba(79,124,255,.10); color:#3254c8; font-size:13px; font-weight:600; border:1px solid rgba(79,124,255,.16)
    }
    h1{margin:16px 0 12px; font-size:clamp(34px,5vw,54px); line-height:1.08}
    .lead{margin:0; font-size:17px; line-height:1.85; color:var(--muted); max-width:62ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:22px 0 18px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:13px 18px; border-radius:14px; border:1px solid transparent; font-weight:700;
      transition:.22s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:0 14px 28px rgba(79,124,255,.22)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn:hover{transform:translateY(-2px); box-shadow:var(--shadow)}
    .hero-tags{display:flex; flex-wrap:wrap; gap:10px; margin-top:10px}
    .tag{padding:8px 12px; border-radius:999px; background:rgba(22,199,201,.10); border:1px solid rgba(22,199,201,.18); color:#1d6c70; font-size:13px}
    .hero-side{display:grid; gap:16px}
    .metric-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .metric{padding:20px}
    .metric strong{display:block; font-size:28px; line-height:1; margin-bottom:8px}
    .metric span{color:var(--muted); font-size:13px; line-height:1.5}
    .quick-panel{padding:20px}
    .quick-panel h3{margin:0 0 12px; font-size:18px}
    .mini-list{display:grid; gap:10px; margin:0; padding:0; list-style:none}
    .mini-list li{display:flex; align-items:flex-start; gap:10px; color:var(--muted); line-height:1.6}
    .mini-dot{width:10px; height:10px; border-radius:50%; margin-top:8px; background:linear-gradient(135deg,var(--brand),var(--accent)); flex:0 0 auto}
    .section-title{margin:0 0 10px; font-size:28px}
    .section-sub{margin:0 0 18px; color:var(--muted); line-height:1.8}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .service-card,.case,.review,.article,.faq-item,.contact-card,.compare,.about-card,.step,.price-box,.timeline,.network{padding:20px}
    .service-card h3,.case h3,.review h3,.article h3,.faq-item summary,.contact-card h3,.compare h3,.about-card h3,.step h3,.price-box h3,.timeline h3,.network h3{margin:0 0 10px; font-size:18px}
    .service-card p,.case p,.review p,.article p,.about-card p,.step p,.price-box p,.timeline p,.network p,.contact-card p{margin:0; color:var(--muted); line-height:1.8}
    .icon-chip{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center; margin-bottom:14px;
      background:linear-gradient(135deg, rgba(79,124,255,.14), rgba(22,199,201,.14));
      color:#3254c8; font-weight:800;
    }
    .flow{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step-num{display:inline-flex; width:32px; height:32px; border-radius:10px; align-items:center; justify-content:center; background:rgba(79,124,255,.12); color:#3254c8; font-weight:800; margin-bottom:12px}
    .table-wrap{overflow:auto; border-radius:16px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:900px}
    th,td{padding:14px 16px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f4f7ff; color:#23304d}
    td{color:var(--muted)}
    .rating{display:flex; gap:6px; align-items:center; flex-wrap:wrap}
    .star{color:#ffb400}
    .faq-item{padding:0; overflow:hidden}
    .faq-item summary{
      list-style:none; cursor:pointer; padding:18px 20px; display:flex; align-items:center; justify-content:space-between; gap:16px;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item .answer{padding:0 20px 18px; color:var(--muted); line-height:1.8}
    .faq-item[open]{box-shadow:var(--shadow)}
    .faq-item summary span{font-weight:700; color:var(--text)}
    .contact-grid{display:grid; grid-template-columns:1fr .9fr; gap:16px}
    form{display:grid; gap:12px}
    .field{display:grid; gap:8px}
    label{font-size:14px; font-weight:600; color:#2a3651}
    input,select,textarea{
      width:100%; padding:13px 14px; border-radius:14px; border:1px solid var(--line); background:#fff; color:var(--text);
      font:inherit; outline:none; transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(79,124,255,.5); box-shadow:0 0 0 4px rgba(79,124,255,.10)}
    textarea{min-height:120px; resize:vertical}
    .comment-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review .meta{display:flex; justify-content:space-between; gap:10px; margin-bottom:10px; color:var(--muted); font-size:13px}
    .pill-row{display:flex; flex-wrap:wrap; gap:10px}
    .pill{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#34435f; font-size:13px}
    .footer{
      margin-top:8px; padding:22px 0 28px; border-top:1px solid rgba(219,228,245,.9);
      background:linear-gradient(180deg, rgba(246,248,252,.2), rgba(241,245,255,.55));
    }
    .footer-inner{display:grid; grid-template-columns:1.2fr .8fr; gap:18px}
    .footer a{color:#2546b8}
    .footer small,.footer p{color:var(--muted)}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center; color:#fff; background:linear-gradient(135deg,var(--brand),var(--accent)); box-shadow:0 14px 28px rgba(79,124,255,.28)
    }
    .float-btn.secondary{background:linear-gradient(135deg,var(--brand-2),#2f8cff)}
    .slide-up{opacity:0; transform:translateY(16px); transition:.5s ease}
    .slide-up.in-view{opacity:1; transform:translateY(0)}
    .ai-page-image{width:100%; border-radius:16px; border:1px solid var(--line); box-shadow:var(--shadow-2)}
    .gallery{display:grid; grid-template-columns:1fr 1fr 1fr; gap:14px}
    .network-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:12px}
    .network-grid span{padding:12px 10px; border-radius:14px; background:#fff; border:1px solid var(--line); text-align:center; color:#32415f; font-size:13px}
    .article-list{display:grid; gap:12px}
    .article-row{display:flex; align-items:flex-start; justify-content:space-between; gap:14px; padding:14px 16px; border-radius:16px; background:#fff; border:1px solid var(--line)}
    .article-row strong{display:block; margin-bottom:6px}
    .article-row time{color:var(--muted); font-size:13px; white-space:nowrap}
    .about-wrap{display:grid; grid-template-columns:1.1fr .9fr; gap:16px}
    .timeline-list{display:grid; gap:12px; margin:0; padding:0; list-style:none}
    .timeline-list li{display:flex; gap:12px; align-items:flex-start}
    .timeline-dot{width:12px; height:12px; margin-top:6px; border-radius:50%; background:linear-gradient(135deg,var(--brand),var(--accent)); flex:0 0 auto}
    .badge-cloud{padding:20px}
    .badge-cloud .pill-row{margin-top:12px}
    .price-box{display:grid; gap:10px}
    .price-box strong{font-size:26px}
    .home-link{font-weight:700; color:#2546b8}
    @media (max-width: 1024px){
      .hero-grid,.contact-grid,.about-wrap{grid-template-columns:1fr}
      .grid-3,.comment-grid,.flow,.network-grid{grid-template-columns:repeat(2,1fr)}
      .gallery{grid-template-columns:1fr}
      .footer-inner{grid-template-columns:1fr}
    }
    @media (max-width: 768px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none; width:100%; padding:10px 0 2px; justify-content:flex-start
      }
      .nav-links.open{display:flex; flex-direction:column; align-items:flex-start}
      .nav{flex-wrap:wrap}
      .metric-grid,.grid-3,.grid-2,.comment-grid,.flow,.network-grid{grid-template-columns:1fr}
      .hero-card{padding:22px}
      .section-title{font-size:24px}
      table{min-width:760px}
    }