:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel2:#f3f7ff;
      --text:#142033;
      --muted:#5e6b84;
      --line:#dce5f2;
      --brand:#4d5df6;
      --brand2:#00c2ff;
      --accent:#8b5cf6;
      --good:#0f9d58;
      --shadow:0 18px 50px rgba(31,55,120,.12);
      --shadow2:0 10px 24px rgba(77,93,246,.14);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      background:
        radial-gradient(circle at 10% 10%, rgba(77,93,246,.10), transparent 22%),
        radial-gradient(circle at 90% 20%, rgba(0,194,255,.10), transparent 18%),
        linear-gradient(180deg, #f8fbff 0%, #f6f8fc 40%, #f7f9ff 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}
    header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(246,248,252,.84);
      border-bottom:1px solid rgba(220,229,242,.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}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:var(--shadow2)}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px}
    .navlinks{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:flex-end}
    .navlinks a,.ghost-btn,.primary-btn,.secondary-btn{
      transition:.24s ease; border:1px solid transparent;
    }
    .navlinks a{
      padding:9px 12px;border-radius:999px;color:#20304d;font-size:14px;
    }
    .navlinks a:hover,.navlinks a.active{background:#fff;border-color:var(--line);box-shadow:var(--shadow2)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;color:var(--text)}
    .hero{
      padding:34px 0 22px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.panel,.faq-item,.quote,.form-wrap,.table-wrap{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(220,229,242,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;filter:blur(4px);pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;background:rgba(77,93,246,.12);right:-60px;top:-70px}
    .hero-main:after{width:180px;height:180px;background:rgba(0,194,255,.10);right:20px;bottom:-80px}
    .eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border-radius:999px;background:linear-gradient(90deg, rgba(77,93,246,.12), rgba(0,194,255,.12));color:#273556;font-weight:700;font-size:13px}
    h1{font-size:clamp(32px,5vw,56px);line-height:1.05;margin:16px 0 14px}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .primary-btn,.secondary-btn,.ghost-btn,.submit-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:700
    }
    .primary-btn,.submit-btn{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 28px rgba(77,93,246,.28)}
    .secondary-btn{background:#fff;color:var(--text);border-color:var(--line)}
    .ghost-btn{background:transparent;color:var(--brand);border-color:rgba(77,93,246,.22)}
    .primary-btn:hover,.secondary-btn:hover,.ghost-btn:hover,.submit-btn:hover{transform:translateY(-2px)}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .mini-stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f5f8ff);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:22px;margin-bottom:6px}
    .mini-stat span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:20px;display:grid;gap:14px}
    .side-callout{padding:18px;border-radius:18px;background:linear-gradient(135deg,#0e1730,#233a7c);color:#fff}
    .side-callout h3{margin:0 0 8px;font-size:18px}
    .side-callout p{margin:0;color:rgba(255,255,255,.82);line-height:1.7}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 11px;border-radius:999px;background:#f4f7fe;border:1px solid var(--line);font-size:13px;color:#30415f}
    main{padding-bottom:14px}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:700px;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{padding:20px}
    .card h3{margin:8px 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:rgba(77,93,246,.10);color:#3550c6;font-size:12px;font-weight:700}
    .metric{font-size:28px;font-weight:800;color:#101b33;margin:10px 0 4px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative}
    .step .num{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800}
    .step:after{content:"";position:absolute;top:28px;right:-10px;width:20px;height:2px;background:linear-gradient(90deg,var(--brand2),transparent)}
    .step:last-child:after{display:none}
    .table-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5f8ff;color:#23324d}
    .highlight{color:#0d6bff;font-weight:800}
    .pill{display:inline-block;padding:5px 10px;border-radius:999px;background:#eef7ff;color:#1160d6;font-size:12px;font-weight:700}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{padding:18px}
    .quote .who{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#ff9d0b;font-weight:800;letter-spacing:1px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline .card{position:relative;overflow:hidden}
    .timeline .card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--brand),var(--brand2))}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;background:transparent;border:0;padding:18px 18px;display:flex;justify-content:space-between;gap:16px;align-items:center;
      font-size:16px;font-weight:700;color:var(--text);cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{max-height:220px;padding-bottom:18px}
    .form-wrap{padding:20px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .form-grid .full{grid-column:1/-1}
    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
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7a89ff;box-shadow:0 0 0 4px rgba(77,93,246,.10)}
    .footer{
      margin-top:10px;padding:24px 0 34px;border-top:1px solid rgba(220,229,242,.9);color:#25344d;background:#f6f8fc
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}
    .footer a{color:#20304d}
    .footer small,.footer p{color:#5d6a81;line-height:1.7}
    .float-tools{
      position:fixed;right:14px;bottom:14px;z-index:60;display:grid;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2);display:grid;place-items:center;color:var(--text);cursor:pointer
    }
    .contact-card{
      display:flex;gap:14px;align-items:center;padding:16px;border-radius:18px;border:1px solid var(--line);background:linear-gradient(180deg,#fff,#f4f7ff)
    }
    .kefu{width:110px;border-radius:16px;border:1px solid var(--line);background:#fff;padding:8px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-list a{display:block;padding:12px 0;border-bottom:1px dashed var(--line);color:#22314d}
    .article-list a:last-child{border-bottom:0}
    .center-note{text-align:center;color:var(--muted);margin-top:12px}
    .marquee{
      overflow:hidden;white-space:nowrap;border:1px solid var(--line);background:#fff;border-radius:16px;padding:12px 0;margin-top:18px
    }
    .marquee span{display:inline-block;padding-left:100%;animation:mar 18s linear infinite;color:#30415f}
    @keyframes mar{to{transform:translateX(-100%)}}
    .reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.footer-grid,.timeline,.steps{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .step:after{display:none}
      .section-head{align-items:flex-start;flex-direction:column}
    }
    @media (max-width: 760px){
      .navlinks{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
      .navlinks.open{display:flex;flex-direction:column;align-items:stretch}
      .navlinks a{justify-content:center;text-align:center}
      .menu-btn{display:inline-flex}
      .form-grid{grid-template-columns:1fr}
      h1{font-size:clamp(30px,9vw,44px)}
      .hero-main,.hero-side,.card,.panel,.quote,.form-wrap{border-radius:18px}
    }