:root{
      --bg:#f7f9fd;
      --panel:#ffffff;
      --panel-2:#fff7ef;
      --line:#e5ebf5;
      --text:#1f2a37;
      --muted:#5c6b7c;
      --brand:#ff6f61;
      --brand-2:#7c6cff;
      --brand-3:#25c2a0;
      --accent:#ffb347;
      --shadow:0 16px 40px rgba(26,42,70,.08);
      --shadow-soft:0 10px 24px rgba(26,42,70,.06);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,111,97,.12), transparent 24%),
        radial-gradient(circle at top right, rgba(124,108,255,.12), transparent 22%),
        radial-gradient(circle at 50% 0, rgba(255,179,71,.10), transparent 20%),
        var(--bg);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(247,249,253,.82);
      border-bottom:1px solid rgba(229,235,245,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand-text span{display:block;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:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,111,97,.10)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;
      cursor:pointer;transition:.22s ease;white-space:nowrap;
      box-shadow:var(--shadow-soft);
    }
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff8d6b);color:#fff}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch
    }
    .hero-main{
      background:
        linear-gradient(135deg, rgba(255,111,97,.14), rgba(124,108,255,.08) 35%, rgba(37,194,160,.08)),
        linear-gradient(180deg, #ffffff, #fffaf7);
      border:1px solid rgba(229,235,245,.85);
      border-radius:28px;
      padding:30px;
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;filter:blur(4px);opacity:.55;pointer-events:none
    }
    .hero-main:before{width:210px;height:210px;background:radial-gradient(circle, rgba(255,179,71,.26), transparent 70%);right:-60px;top:-50px}
    .hero-main:after{width:160px;height:160px;background:radial-gradient(circle, rgba(124,108,255,.18), transparent 70%);left:-40px;bottom:-50px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:rgba(255,111,97,.10);
      color:#b4382e;
      border:1px solid rgba(255,111,97,.16);
      padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700
    }
    h1{margin:16px 0 12px;font-size:clamp(30px,4.4vw,52px);line-height:1.12}
    .lead{font-size:16px;color:var(--muted);max-width:58ch;margin:0 0 20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0}
    .hero-point{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(229,235,245,.95);
      border-radius:18px;padding:14px
    }
    .hero-point strong{display:block;font-size:18px}
    .hero-point span{display:block;font-size:13px;color:var(--muted);margin-top:3px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .hero-actions .btn-primary{padding-inline:22px}
    .home-link{display:inline-flex;align-items:center;gap:8px;color:#b4382e;font-weight:700}
    .hero-side{
      display:grid;gap:14px
    }
    .mini-card,.glass-card{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(229,235,245,.95);
      border-radius:24px;
      padding:20px;
      box-shadow:var(--shadow-soft);
    }
    .mini-card h3,.section-title h2{margin:0 0 10px;font-size:22px}
    .mini-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .mini-list li{
      display:flex;justify-content:space-between;gap:12px;align-items:flex-start;
      padding:10px 0;border-top:1px dashed rgba(229,235,245,.9)
    }
    .mini-list li:first-child{border-top:0;padding-top:0}
    .mini-list strong{display:block}
    .mini-list span{color:var(--muted);font-size:13px}
    .section{padding:16px 0 10px}
    .section-title{
      display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:16px
    }
    .section-title p{margin: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}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:var(--radius);
      padding:20px;
      box-shadow:var(--shadow-soft);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d7e1ee}
    .icon-badge{
      width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(255,111,97,.16), rgba(124,108,255,.14));
      color:#7c4bff;font-size:20px;margin-bottom:12px
    }
    .card h3{margin:0 0 8px;font-size:18px}
    .card p{margin:0;color:var(--muted);font-size:14px}
    .stats .card{min-height:156px}
    .stat{font-size:32px;font-weight:900;letter-spacing:-.5px;margin-bottom:6px}
    .stat small{font-size:14px;color:var(--muted);font-weight:600}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#3b4b5e;font-size:13px
    }
    .workflow{
      display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px
    }
    .step{
      position:relative;
      padding:20px;border-radius:22px;background:linear-gradient(180deg,#fff,#fff8f1);
      border:1px solid var(--line)
    }
    .step:after{
      content:"";position:absolute;top:22px;right:18px;font-size:44px;font-weight:900;color:rgba(255,111,97,.10)
    }
    .step:nth-child(1):after{content:"01"} .step:nth-child(2):after{content:"02"} .step:nth-child(3):after{content:"03"} .step:nth-child(4):after{content:"04"}
    .step strong{display:block;margin-bottom:8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow-soft)}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:900px}
    th,td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#fbfcff;font-size:14px}
    tr:last-child td{border-bottom:0}
    .check{color:#14a06f;font-weight:800}
    .soft{color:var(--muted)}
    .review-grid,.article-grid,.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote{
      position:relative;background:linear-gradient(180deg,#fff,#fffaf7);
    }
    .quote:before{content:"“";font-size:42px;line-height:1;color:rgba(255,111,97,.22);position:absolute;top:12px;right:16px}
    .quote .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;color:var(--muted);font-size:13px}
    .article-list{display:grid;gap:12px}
    .article-item{
      display:flex;justify-content:space-between;gap:16px;align-items:flex-start;
      padding:14px 0;border-top:1px dashed var(--line)
    }
    .article-item:first-child{border-top:0;padding-top:0}
    .article-item strong{display:block;margin-bottom:4px}
    .article-item span{display:block;color:var(--muted);font-size:13px}
    .faq details{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 18px;box-shadow:var(--shadow-soft)
    }
    .faq details+details{margin-top:12px}
    .faq summary{
      cursor:pointer;list-style:none;padding:16px 0;font-weight:700;display:flex;justify-content:space-between;gap:12px
    }
    .faq summary::-webkit-details-marker{display:none}
    .faq summary:after{content:"+";color:var(--brand);font-size:20px;line-height:1}
    .faq details[open] summary:after{content:"–"}
    .faq .answer{padding:0 0 16px;color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
    form{
      display:grid;gap:12px
    }
    .field{display:grid;gap:7px}
    label{font-size:14px;font-weight:700}
    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:border-color .2s, box-shadow .2s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#f49b85;box-shadow:0 0 0 4px rgba(255,111,97,.10)}
    .contact-box{
      background:linear-gradient(180deg,#fff,#fffaf4);
      border:1px solid var(--line);border-radius:24px;padding:20px
    }
    .contact-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .qr{
      display:flex;gap:14px;align-items:center;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .qr img{width:106px;height:106px;object-fit:cover;border-radius:14px;border:1px solid var(--line);background:#fff}
    .footer{
      margin-top:18px;padding:24px 0 30px;border-top:1px solid rgba(229,235,245,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.78), rgba(247,249,253,.95));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:16px;align-items:start}
    .footer a{color:#304d8b}
    .footer .small{color:var(--muted);font-size:13px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-soft);
      display:grid;place-items:center;cursor:pointer;transition:.2s;color:var(--text)
    }
    .floating a:hover,.floating button:hover{transform:translateY(-2px)}
    .mobile-toggle{display:none}
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease, transform .6s ease}
    .reveal.show{opacity:1;transform:translateY(0)}
    .subtle-line{height:1px;background:linear-gradient(90deg,transparent,rgba(229,235,245,.9),transparent);margin:18px 0}
    .image-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
    .image-strip img,.square-strip img,.wide-strip img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-soft)}
    .wide-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .square-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    @media (max-width: 1080px){
      .hero-grid,.form-grid,.footer-grid{grid-template-columns:1fr}
      .grid-4,.workflow,.grid-3,.review-grid,.article-grid,.case-grid,.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .nav-links.open{
        display:flex;position:absolute;left:16px;right:16px;top:74px;flex-direction:column;align-items:flex-start;
        background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow)
      }
      .nav{position:relative}
      .wide-strip,.image-strip,.square-strip{grid-template-columns:1fr}
      .contact-row{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .container{width:min(100% - 22px, var(--container))}
      .hero-main,.card,.mini-card,.glass-card,.contact-box{padding:18px}
      .section-title{flex-direction:column;align-items:flex-start}
      .grid-4,.workflow,.grid-3,.review-grid,.article-grid,.case-grid,.grid-2{grid-template-columns:1fr}
      .btn{width:100%}
      .hero-actions{display:grid}
      .nav-actions .btn-secondary{display:none}
      .floating{right:12px;bottom:12px}
    }