:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel-2:#f1f4ff;
      --text:#132033;
      --muted:#5b6b84;
      --line:#d9e2f2;
      --brand:#5b6cff;
      --brand-2:#7e4dff;
      --brand-3:#2bb7ff;
      --accent:#ff8f5c;
      --good:#1f9d6a;
      --shadow:0 18px 48px rgba(17, 34, 68, .10);
      --radius:22px;
      --radius-sm:16px;
      --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(91,108,255,.10), transparent 30%),
        radial-gradient(circle at 90% 10%, rgba(126,77,255,.10), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, #f6f7fb 38%, #f4f7fc 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:40;
      backdrop-filter:blur(16px);
      background:rgba(248,250,255,.84);
      border-bottom:1px solid rgba(217,226,242,.78);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain}
    .brand .name{font-weight:800;letter-spacing:.4px}
    .brand .sub{font-size:12px;color:var(--muted)}
    .nav-links{
      display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav-links a{font-size:14px;color:#2a3953;font-weight:600;opacity:.92}
    .nav-links a:hover{color:var(--brand)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;
      padding:12px 18px;font-weight:700;font-size:14px;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
      cursor:pointer;white-space:nowrap;
    }
    .btn:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(17,34,68,.12)}
    .btn-primary{
      color:#fff;background:linear-gradient(135deg,var(--brand) 0%, var(--brand-2) 52%, var(--brand-3) 100%);
      box-shadow:0 16px 34px rgba(91,108,255,.22);
    }
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px}
    .menu-btn svg{width:20px;height:20px}
    .hero{
      position:relative;
      padding:34px 0 18px;
      overflow:hidden;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:stretch;
    }
    .hero-copy{
      position:relative;
      padding:28px;
      border-radius:28px;
      background:
        linear-gradient(135deg, rgba(91,108,255,.10), rgba(126,77,255,.08) 45%, rgba(43,183,255,.08)),
        rgba(255,255,255,.72);
      border:1px solid rgba(217,226,242,.9);
      box-shadow:var(--shadow);
      min-height:100%;
      isolation:isolate;
    }
    .hero-copy::before,.hero-copy::after{
      content:"";
      position:absolute;border-radius:999px;filter:blur(6px);opacity:.9;z-index:-1
    }
    .hero-copy::before{width:180px;height:180px;right:-50px;top:-46px;background:radial-gradient(circle, rgba(43,183,255,.30), transparent 68%)}
    .hero-copy::after{width:220px;height:220px;left:-80px;bottom:-90px;background:radial-gradient(circle, rgba(126,77,255,.18), transparent 70%)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:rgba(91,108,255,.09);color:#4054cc;font-weight:700;font-size:13px;
      border:1px solid rgba(91,108,255,.16);
    }
    h1{
      margin:16px 0 14px;
      font-size:clamp(32px, 4vw, 54px);
      line-height:1.08;
      letter-spacing:-.02em;
    }
    .lead{font-size:17px;color:var(--muted);max-width:50ch;margin:0 0 18px}
    .hero-points{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:18px 0 22px
    }
    .point{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(217,226,242,.9);
      border-radius:18px;padding:14px 14px 12px;
      box-shadow:0 10px 22px rgba(17,34,68,.04);
    }
    .point strong{display:block;font-size:15px;margin-bottom:4px}
    .point span{display:block;font-size:13px;color:var(--muted)}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .hero-meta{
      display:flex;flex-wrap:wrap;gap:10px;margin-top:18px
    }
    .tag{
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#33445f;
      font-size:13px;font-weight:600
    }
    .hero-card{
      background:linear-gradient(180deg, rgba(18,28,46,.96), rgba(27,40,72,.94));
      color:#eef4ff;
      border-radius:28px;
      padding:24px;
      box-shadow:0 20px 52px rgba(9,16,32,.26);
      position:relative;
      overflow:hidden;
    }
    .hero-card::before{
      content:"";
      position:absolute;inset:auto -18% -22% auto;width:240px;height:240px;border-radius:50%;
      background:radial-gradient(circle, rgba(91,108,255,.45), transparent 62%);
    }
    .hero-card::after{
      content:"";
      position:absolute;inset:18px;border-radius:22px;border:1px solid rgba(255,255,255,.10);pointer-events:none
    }
    .hero-card h2{margin:0 0 10px;font-size:22px}
    .metric-grid{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px;position:relative;z-index:1
    }
    .metric{
      padding:16px;border-radius:18px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08)
    }
    .metric .num{font-size:26px;font-weight:900;line-height:1}
    .metric .lab{font-size:13px;color:#cfd8ee;margin-top:6px}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:0 0 16px}
    .section h2{margin:0;font-size:28px;line-height:1.15}
    .section p.sub{margin:6px 0 0;color:var(--muted);max-width:70ch}
    .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}
    .card{
      background:rgba(255,255,255,.84);
      border:1px solid rgba(217,226,242,.92);
      border-radius:24px;
      box-shadow:0 12px 28px rgba(17,34,68,.05);
      padding:20px;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(17,34,68,.10);border-color:#c9d7f3}
    .stat{
      background:linear-gradient(180deg, #ffffff, #f4f7ff);
    }
    .stat .big{font-size:28px;font-weight:900;color:#1f2d4b}
    .stat .label{font-size:13px;color:var(--muted);margin-top:6px}
    .stat .note{font-size:12px;color:#6f7d95;margin-top:10px}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(91,108,255,.12), rgba(43,183,255,.12));
      color:#3c57d9;font-weight:900;margin-bottom:14px
    }
    .card h3{margin:0 0 8px;font-size:18px}
    .card p{margin:0;color:var(--muted)}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start
    }
    .list{
      display:grid;gap:12px;margin:0;padding:0;list-style:none
    }
    .list li{
      padding:14px 14px 14px 16px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .list strong{display:block;margin-bottom:4px}
    .table-wrap{overflow:auto;border-radius:22px;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 #e7edf7;text-align:left;vertical-align:top}
    th{background:#f5f8ff;color:#20324e;font-size:14px}
    td{color:#415167;font-size:14px}
    .badge{
      display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;
      background:rgba(31,157,106,.10);color:var(--good);font-weight:700;font-size:12px
    }
    .timeline{display:grid;gap:14px}
    .step{
      display:grid;grid-template-columns:72px 1fr;gap:14px;align-items:start;
      padding:18px;background:#fff;border:1px solid var(--line);border-radius:22px
    }
    .step .no{
      width:56px;height:56px;border-radius:18px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(91,108,255,.14), rgba(126,77,255,.14));color:#4054cc;font-weight:900
    }
    .step h3{margin:0 0 6px}
    .gallery{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .imgbox{
      background:#fff;border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)
    }
    .imgbox img{width:100%;height:auto;border-radius:18px}
    .reviews,.news,.faq-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review{
      background:linear-gradient(180deg,#fff,#f7f9ff);
      border:1px solid var(--line);border-radius:22px;padding:18px
    }
    .review .who{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}
    .stars{color:#ffb400;letter-spacing:1px}
    .form-wrap{
      display:grid;grid-template-columns:1fr .9fr;gap:16px;align-items:start
    }
    form{
      display:grid;gap:12px
    }
    .field{
      display:grid;gap:7px
    }
    .field label{font-size:14px;font-weight:700;color:#24344f}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;
      padding:13px 14px;font-size:15px;color:var(--text);outline:none;transition:border-color .2s ease, box-shadow .2s ease
    }
    .field input:focus,.field select:focus,.field textarea:focus{
      border-color:#96a9ff;box-shadow:0 0 0 4px rgba(91,108,255,.10)
    }
    .field textarea{min-height:120px;resize:vertical}
    .helpbox{
      display:grid;gap:12px
    }
    .mini{
      padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(91,108,255,.08), rgba(43,183,255,.08));
      border:1px solid rgba(91,108,255,.14)
    }
    .mini h3{margin:0 0 8px}
    .links{
      display:flex;flex-wrap:wrap;gap:10px
    }
    .link-chip{
      padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;font-weight:600
    }
    .footer{
      margin-top:18px;
      background:#111c2f;color:#dce7ff;
      padding:26px 0 22px;
    }
    .footer a{color:#ffffff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer .muted{color:#b7c6e6}
    .footer .line{height:1px;background:rgba(255,255,255,.12);margin:18px 0}
    .footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;color:#b7c6e6;font-size:13px}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:50;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:18px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 16px 28px rgba(91,108,255,.28);
      color:#fff;font-weight:900
    }
    .float-panel{
      display:none;position:absolute;right:0;bottom:62px;width:min(300px, calc(100vw - 36px));
      background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:14px
    }
    .float-panel img{width:100%;border-radius:16px}
    .float-panel .small{font-size:13px;color:var(--muted);margin-top:8px}
    .scroll-top{display:none}
    .scroll-top.show,.floating:hover .float-panel{display:block}
    .ai-page-image{border-radius:16px}
    .ai-page-logo{border-radius:10px}
    .ai-page-home-link{font-weight:700;color:var(--brand)}
    .faq-item{
      background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden
    }
    .faq-q{
      width:100%;padding:16px 16px;background:transparent;border:0;text-align:left;
      font:inherit;font-weight:800;color:#1b2942;display:flex;justify-content:space-between;gap:14px;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 16px}
    .faq-item.open .faq-a{padding-bottom:16px;max-height:180px}
    .faq-item.open .faq-q{color:var(--brand)}
    .page-rail{
      display:flex;flex-wrap:wrap;gap:10px;align-items:center
    }
    .section-anchor{scroll-margin-top:92px}
    .compare-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .compare-score{
      display:flex;gap:14px;flex-wrap:wrap;margin-top:16px
    }
    .score-box{
      flex:1;min-width:160px;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .score-box .v{font-size:30px;font-weight:900;color:#1d2d49}
    .score-box .t{font-size:13px;color:var(--muted)}
    @media (max-width: 1080px){
      .grid-4,.reviews,.news,.faq-list{grid-template-columns:repeat(2,minmax(0,1fr))}
      .hero-grid,.split,.gallery,.form-wrap,.footer-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
    }
    @media (max-width: 720px){
      .container{padding:0 16px}
      .hero{padding-top:18px}
      .hero-copy,.hero-card{padding:20px;border-radius:24px}
      .hero-points,.grid-3,.grid-4,.reviews,.news,.faq-list{grid-template-columns:1fr}
      .section h2{font-size:24px}
      .nav{min-height:66px}
      .nav-mobile{
        display:none;
        padding:0 0 16px;
      }
      .nav-mobile.open{display:block}
      .nav-mobile .panel{
        background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;display:grid;gap:10px;box-shadow:var(--shadow)
      }
      .nav-mobile a{padding:10px 0;border-bottom:1px dashed #e4ebf5;font-weight:600;color:#31415f}
      .nav-mobile a:last-child{border-bottom:0}
      table{min-width:720px}
      .step{grid-template-columns:1fr}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .reveal.show{opacity:1;transform:translateY(0)}