:root{
      --bg:#f5f8fd;
      --surface:#ffffff;
      --surface-2:#eef4ff;
      --text:#152034;
      --muted:#5c6b84;
      --line:#dbe5f5;
      --primary:#0f4bd6;
      --primary-2:#2e7bff;
      --accent:#ffb300;
      --shadow:0 18px 40px rgba(17,44,104,.10);
      --shadow-soft:0 10px 25px rgba(17,44,104,.08);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(46,123,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(255,179,0,.10), transparent 18%),
        linear-gradient(180deg, #f8fbff 0%, #f4f8ff 45%, #f7f9fd 100%);
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:40;
      backdrop-filter:saturate(160%) blur(14px);
      background:rgba(245,248,253,.86);
      border-bottom:1px solid rgba(219,229,245,.8);
    }
    .nav-wrap{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:40px;height:40px;object-fit:contain;border-radius:10px;background:#fff;box-shadow:0 6px 16px rgba(15,75,214,.10)}
    .brand-text strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px;font-size:14px}
    .nav{
      display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:10px;transition:.25s}
    .nav a:hover{background:var(--surface-2);color:var(--primary)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:999px;padding:12px 18px;font-weight:700;
      transition:.25s transform,.25s box-shadow,.25s background,.25s color;
      cursor:pointer;white-space:nowrap
    }
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}
    .btn-ghost{background:#fff;color:var(--primary);border:1px solid rgba(15,75,214,.18)}
    .hero{padding:30px 0 12px}
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:stretch
    }
    .hero-card,.panel,.card,.faq-item,.review,.article-item,.metric,.case,.price-box,.timeline li,.tag-cloud a,.contact-box{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(219,229,245,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft)
    }
    .hero-card{padding:34px;position:relative;overflow:hidden}
    .hero-card:before,.hero-card:after{
      content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none
    }
    .hero-card:before{width:240px;height:240px;background:rgba(46,123,255,.12);right:-60px;top:-60px}
    .hero-card:after{width:180px;height:180px;background:rgba(255,179,0,.12);right:80px;bottom:-60px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:var(--surface-2);color:var(--primary);font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,5vw,56px);line-height:1.08;margin:18px 0 14px;letter-spacing:-.02em}
    .hero-lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:820px;margin:0 0 22px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-stat{padding:14px 16px;border-radius:16px;background:linear-gradient(180deg,#ffffff,#f6f9ff);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:20px;color:var(--primary)}
    .mini-stat span{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}
    .side-stack{display:grid;gap:18px}
    .panel{padding:22px}
    .panel h2,.section-title h2{margin:0 0 10px;font-size:28px;line-height:1.2}
    .panel p,.section-desc{margin:0;color:var(--muted);line-height:1.75}
    .panel .meta{display:grid;gap:10px;margin-top:16px}
    .meta-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:12px 14px;background:#f8fbff;border:1px solid var(--line);border-radius:14px}
    .meta-row strong{font-size:14px}
    .meta-row span{font-size:13px;color:var(--muted);line-height:1.5;text-align:right}
    main section{padding:24px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-title h2{font-size:30px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.7}
    .icon-badge{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(15,75,214,.12),rgba(46,123,255,.18));color:var(--primary);font-weight:800;margin-bottom:14px}
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#f2f6ff;border:1px solid var(--line);font-size:13px;color:#20304c}
    .content-box{padding:24px;background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
    .steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{padding:20px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7faff);border:1px solid var(--line)}
    .step:before{counter-increment:step;content:"0" counter(step);display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;margin-bottom:14px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
    th{background:#f4f8ff;color:#20304c}
    td{color:var(--muted)}
    .highlight{color:var(--primary);font-weight:700}
    .score{display:flex;align-items:center;gap:12px;margin-top:16px;padding:16px;border-radius:18px;background:linear-gradient(135deg,#eef4ff,#ffffff);border:1px solid var(--line)}
    .stars{color:#ffaf00;font-size:18px;letter-spacing:2px}
    details{
      background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 16px;box-shadow:var(--shadow-soft)
    }
    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{margin:0 0 16px;color:var(--muted);line-height:1.75}
    .review .top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#0f4bd6,#2e7bff);color:#fff;display:grid;place-items:center;font-weight:700}
    .review h3{margin:0;font-size:16px}
    .review .role{font-size:13px;color:var(--muted)}
    .review p{margin:12px 0 0;color:var(--muted);line-height:1.8}
    .article-item{padding:18px}
    .article-item a{display:block;color:var(--text);font-weight:700;margin-bottom:8px}
    .article-item small{color:var(--muted);line-height:1.7;display:block}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#24324d}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;
      padding:12px 14px;font:inherit;color:var(--text);outline:none;transition:.2s
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(15,75,214,.45);box-shadow:0 0 0 4px rgba(15,75,214,.08)}
    textarea{min-height:120px;resize:vertical}
    .contact-grid{display:grid;grid-template-columns:1fr .95fr;gap:16px;align-items:start}
    .contact-box{padding:22px}
    .qr{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
    .qr img{width:160px;height:160px;object-fit:cover;border-radius:18px;border:1px solid var(--line);background:#fff}
    .footer{margin-top:24px;padding:24px 0 32px;border-top:1px solid rgba(219,229,245,.9);background:rgba(245,248,253,.9)}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
    .footer p,.footer a,.footer small{color:#3a4a67}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;background:#fff;border:1px solid var(--line);border-radius:999px}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:50;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{width:54px;height:54px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:var(--shadow);border:none;cursor:pointer}
    .float-link{width:54px;height:54px;border-radius:18px;display:grid;place-items:center;background:#fff;color:var(--primary);box-shadow:var(--shadow);border:1px solid var(--line)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a{padding:10px 14px;color:#20304c;background:#fff;border-radius:999px;border:1px solid var(--line)}
    .timeline{list-style:none;padding:0;margin:0;display:grid;gap:12px}
    .timeline li{padding:16px 18px;display:flex;justify-content:space-between;gap:18px;align-items:flex-start}
    .timeline strong{display:block;margin-bottom:4px}
    .timeline span{color:var(--muted);line-height:1.7}
    .mobile-only{display:none}
    .section-note{font-size:13px;color:var(--muted)}
    .scroll-reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .scroll-reveal.visible{opacity:1;transform:none}
    .banner-images{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .banner-images img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow-soft)}
    @media (max-width: 1080px){
      .hero-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
      .grid-4,.grid-3,.steps{grid-template-columns:repeat(2,minmax(0,1fr))}
      .grid-2{grid-template-columns:1fr}
      .banner-images{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav{
        display:none;position:absolute;left:16px;right:16px;top:76px;flex-direction:column;align-items:stretch;
        background:rgba(255,255,255,.98);padding:14px;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)
      }
      .nav.open{display:flex}
      .nav a{padding:12px 14px}
      .hero-card{padding:24px}
      .hero-points,.grid-4,.grid-3,.steps,.form-grid{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      h1{font-size:30px}
      .mobile-only{display:block}
      .desktop-only{display:none}
      .qr{justify-content:flex-start}
      .floating{right:14px;bottom:14px}
    }