:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f2f6ff;
      --text:#172033;
      --muted:#5f6b84;
      --line:#dbe4f3;
      --primary:#2563eb;
      --primary-2:#0ea5e9;
      --accent:#22c55e;
      --warm:#ffb703;
      --shadow:0 18px 50px rgba(23,32,51,.08);
      --radius:22px;
      --max: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(37,99,235,.10), transparent 26%),
        radial-gradient(circle at top right, rgba(14,165,233,.10), transparent 22%),
        linear-gradient(180deg, #ffffff 0%, #f7f8fc 28%, #f7f8fc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(247,248,252,.84);
      border-bottom:1px solid rgba(219,228,243,.7);
    }
    .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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 10px 30px rgba(37,99,235,.12)}
    .brand strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .navlinks{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:flex-end}
    .navlinks a,.navlinks button{
      border:1px solid transparent;
      background:#fff;
      color:var(--text);
      padding:10px 14px;border-radius:999px;
      font-size:14px;line-height:1;
      box-shadow:0 10px 22px rgba(23,32,51,.04);
      transition:.25s ease;
    }
    .navlinks a:hover,.navlinks button:hover{transform:translateY(-1px);border-color:var(--line);box-shadow:0 14px 30px rgba(23,32,51,.08)}
    .nav-toggle{display:none}
    .hero{
      padding:34px 0 20px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.section-card,.faq-item,.review,.article,.case,.metric,.price-card,.form-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(219,228,243,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;background:radial-gradient(circle, rgba(37,99,235,.16), transparent 70%);right:-50px;top:-50px}
    .hero-main:after{width:170px;height:170px;background:radial-gradient(circle, rgba(34,197,94,.12), transparent 70%);right:80px;bottom:-70px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:linear-gradient(90deg, rgba(37,99,235,.10), rgba(14,165,233,.10));
      color:#1746b2;font-size:13px;font-weight:600
    }
    h1{margin:16px 0 12px;font-size:clamp(30px,4.6vw,54px);line-height:1.06;letter-spacing:-.03em}
    .lead{font-size:16px;line-height:1.85;color:var(--muted);margin:0 0 22px;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0 22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;
      transition:.25s ease;cursor:pointer;font-size:15px
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 18px 34px rgba(37,99,235,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 22px 42px rgba(37,99,235,.28)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:#b8c8eb}
    .hero-points{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px
    }
    .point{
      padding:14px 14px 14px 16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid rgba(219,228,243,.9)
    }
    .point strong{display:block;font-size:15px;margin-bottom:6px}
    .point span{color:var(--muted);font-size:13px;line-height:1.6}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .mini-banner{
      border-radius:18px;padding:18px;background:linear-gradient(135deg,#eff6ff,#f0fdf4);
      border:1px solid rgba(191,219,254,.75)
    }
    .mini-banner h2{margin:0 0 10px;font-size:18px}
    .mini-banner p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .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:#334155;font-size:13px
    }
    .metrics{padding:18px 0 0}
    .metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .metric{padding:18px}
    .metric b{display:block;font-size:28px;line-height:1;color:#0f172a}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.5}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:68ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .card ul{margin:0;padding-left:18px}
    .icon{
      width:42px;height:42px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg, rgba(37,99,235,.12), rgba(14,165,233,.12)); color:#1d4ed8;
      margin-bottom:12px;font-weight:800
    }
    .process{counter-reset:step}
    .process .card{position:relative;overflow:hidden}
    .process .card:before{
      counter-increment:step;content:counter(step, decimal-leading-zero);
      position:absolute;right:18px;top:16px;font-size:22px;font-weight:800;color:rgba(37,99,235,.14)
    }
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:15px 14px;border-bottom:1px solid #edf2fb;text-align:left;vertical-align:top}
    th{background:#f8fbff;font-size:14px;color:#334155}
    td{color:#334155;font-size:14px;line-height:1.7}
    .rating{display:flex;align-items:center;gap:8px;font-weight:700}
    .stars{color:#f59e0b;letter-spacing:2px}
    .faq{display:grid;grid-template-columns:1fr;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;color:var(--text);padding:18px 18px;
      display:flex;align-items:center;justify-content:space-between;gap:14px;font-size:16px;font-weight:700;cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px;color:var(--muted);line-height:1.8}
    .faq-item.active .faq-a{padding-bottom:18px}
    .faq-item.active .chev{transform:rotate(180deg)}
    .chev{transition:transform .25s ease}
    .reviews .review{padding:18px}
    .review .meta{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}
    .review .name{font-weight:800}
    .review .role{font-size:13px;color:var(--muted)}
    .review p{margin:0;color:var(--muted);line-height:1.8}
    .case{padding:18px}
    .case h3{margin:0 0 8px}
    .case .stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .case .stats span,.pill{
      display:inline-flex;align-items:center;padding:8px 11px;border-radius:999px;
      background:#f8fbff;border:1px solid var(--line);color:#334155;font-size:13px
    }
    .articles .article{padding:18px}
    .article h3{margin:0 0 8px;font-size:17px}
    .article p{margin:0 0 12px;color:var(--muted);line-height:1.75}
    .article a{color:#1746b2;font-weight:700}
    .form-card{padding:22px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700;color:#334155}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;
      color:var(--text);font:inherit;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#9cc2ff;box-shadow:0 0 0 4px rgba(37,99,235,.08)}
    textarea{min-height:132px;resize:vertical}
    .footer{
      margin-top:12px;padding:24px 0 18px;background:linear-gradient(180deg,#f6f9ff,#eef4ff);
      border-top:1px solid var(--line);color:#1f2a44
    }
    .footer a{color:#1746b2}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:16px;align-items:start}
    .footer small{color:#51607c;line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{display:inline-flex;padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .floating a,.floating button{
      border:0;cursor:pointer;
      width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;
      box-shadow:0 16px 30px rgba(37,99,235,.26)
    }
    .floating .secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .fade-up{opacity:0;transform:translateY(14px);transition:opacity .6s ease, transform .6s ease}
    .fade-up.in{opacity:1;transform:translateY(0)}
    .home-link{display:inline-flex;align-items:center;gap:8px;color:#1746b2;font-weight:800}
    .notice{padding:14px 16px;border-radius:18px;background:#fffbe6;border:1px solid #ffe08a;color:#7c5a00;line-height:1.7}
    .kefu{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:center}
    .kefu img{width:120px;aspect-ratio:1/1;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .service-net{display:flex;flex-wrap:wrap;gap:10px}
    .service-net span{padding:10px 12px;border-radius:14px;background:#fff;border:1px solid var(--line);color:#334155;font-size:13px}
    .comparison{display:grid;grid-template-columns:1fr .8fr;gap:14px;align-items:stretch}
    .comparison .score-card{padding:22px;background:linear-gradient(135deg,#eff6ff,#f0fdf4)}
    .divider{height:1px;background:var(--line);margin:16px 0}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.metric-grid,.footer-grid,.comparison{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .nav{flex-wrap:wrap;padding:10px 0}
      .navlinks{display:none;width:100%;padding-bottom:8px}
      .navlinks.open{display:flex}
      .nav-toggle{display:inline-flex}
      .hero-points{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .kefu{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .hero-main,.hero-side,.card,.section-card,.faq-item,.review,.article,.case,.metric,.price-card,.form-card{border-radius:18px}
      .hero-main{padding:22px}
      h1{font-size:34px}
      .lead{font-size:15px}
      .navlinks a,.navlinks button{padding:10px 12px}
      .topbar{position:sticky}
    }