:root{
      --bg:#f5f8ff;
      --panel:#ffffff;
      --panel-2:#f1f6ff;
      --text:#182133;
      --muted:#5f6b82;
      --primary:#165dff;
      --primary-2:#0a3fb3;
      --accent:#2dd4ff;
      --line:#dbe5fb;
      --shadow:0 16px 40px rgba(17, 42, 104, .10);
      --radius:20px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(22,93,255,.12), transparent 30%),
        radial-gradient(circle at top right, rgba(45,212,255,.10), transparent 26%),
        linear-gradient(180deg,#f8fbff 0%, #f3f7ff 45%, #f7f9fd 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:80;
      backdrop-filter:blur(14px);
      background:rgba(247,250,255,.82);
      border-bottom:1px solid rgba(219,229,251,.85);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:72px;padding:10px 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:10px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 8px 18px rgba(22,93,255,.08)}
    .brand strong{display:block;font-size:18px;letter-spacing:.4px}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .navlinks{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .navlinks a{font-size:14px;color:#31405c;padding:8px 10px;border-radius:999px;transition:.22s}
    .navlinks a:hover,.navlinks a.active{background:rgba(22,93,255,.10);color:var(--primary)}
    .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:11px 16px;font-weight:700;cursor:pointer;
      transition:.24s ease;box-shadow:none;
      white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#4b8bff);color:#fff;box-shadow:0 12px 24px rgba(22,93,255,.18)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(22,93,255,.24)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#b7c8ef;transform:translateY(-1px)}
    .menu-toggle{display:none}
    .hero{padding:36px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-card{
      background:linear-gradient(145deg, rgba(16,76,214,.98), rgba(23,108,255,.92));
      color:#fff;border-radius:28px;padding:34px;position:relative;overflow:hidden;
      box-shadow:0 22px 60px rgba(22,93,255,.22)
    }
    .hero-card:before,.hero-card:after{
      content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.10);filter:blur(0)
    }
    .hero-card:before{width:220px;height:220px;right:-70px;top:-70px}
    .hero-card:after{width:140px;height:140px;right:70px;bottom:-40px}
    .kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);padding:8px 12px;border-radius:999px;font-size:13px}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,48px);line-height:1.08}
    .hero p{margin:0;color:rgba(255,255,255,.92);line-height:1.75;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .meta{
      background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.14);
      border-radius:18px;padding:14px 16px
    }
    .meta b{display:block;font-size:20px;margin-bottom:4px}
    .meta span{font-size:13px;color:rgba(255,255,255,.86)}
    .hero-side{display:grid;gap:16px}
    .mini-panel,.panel{
      background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)
    }
    .mini-panel{padding:20px}
    .mini-panel h3,.section-title h2{margin:0 0 10px;font-size:22px}
    .mini-panel p,.section-desc{margin:0;color:var(--muted);line-height:1.7}
    .trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .pill{font-size:13px;padding:8px 12px;border-radius:999px;background:#edf4ff;color:#21407f;border:1px solid #d9e5ff}
    .section{padding:18px 0}
    .section-title{display:flex;justify-content:space-between;gap:14px;align-items:end;margin-bottom:16px;flex-wrap:wrap}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .card{
      background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;
      box-shadow:0 10px 26px rgba(15,37,90,.06);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease
    }
    .card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(15,37,90,.10);border-color:#bdd0f7}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.7}
    .stat{
      background:linear-gradient(180deg,#fff,#f8fbff);
      display:flex;flex-direction:column;gap:10px;min-height:154px
    }
    .stat .num{font-size:28px;font-weight:800;color:var(--primary)}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(22,93,255,.12), rgba(45,212,255,.15));color:var(--primary);font-weight:800
    }
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative}
    .step .idx{
      width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-weight:800;
      color:#fff;background:linear-gradient(135deg,var(--primary),#59a1ff);box-shadow:0 10px 18px rgba(22,93,255,.22)
    }
    .step:after{
      content:"";position:absolute;top:18px;right:-7px;width:14px;height:2px;background:linear-gradient(90deg,#cfdcf9,transparent)
    }
    .flow .step:last-child:after{display:none}
    table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden}
    .table-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    th,td{padding:14px 16px;border-bottom:1px solid #edf2fb;text-align:left;vertical-align:top}
    th{background:#f6f9ff;font-size:14px;color:#22314d;white-space:nowrap}
    td{color:#31405c}
    tr:last-child td{border-bottom:none}
    .compare .rating{
      display:flex;align-items:center;gap:8px;font-weight:800;color:#0f4bd9
    }
    .stars{letter-spacing:2px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .case{
      display:grid;grid-template-columns:140px 1fr;gap:14px;align-items:start
    }
    .case .thumb{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#edf4ff}
    .case .thumb img{width:100%;height:auto}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a,.tag-cloud span{
      padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#30405e;font-size:13px
    }
    .price-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .price{
      padding:22px;border-radius:24px;background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid var(--line)
    }
    .price .amt{font-size:28px;font-weight:900;color:var(--primary);margin:8px 0}
    .faq-item{border:1px solid var(--line);background:#fff;border-radius:18px;overflow:hidden}
    .faq-q{
      width:100%;text-align:left;padding:16px 18px;background:#fff;border:0;color:var(--text);
      display:flex;justify-content:space-between;gap:12px;font-size:16px;font-weight:700;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{padding-bottom:16px;max-height:220px}
    .faq-item.open .faq-q{background:#f6f9ff}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review .who{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .review .who b{font-size:16px}
    .review .role{color:var(--primary);font-size:13px}
    .review p{color:var(--muted);line-height:1.75;margin:0}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .article{
      display:flex;justify-content:space-between;gap:16px;align-items:center
    }
    .article .date{font-size:13px;color:#6a7590;white-space:nowrap}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-group{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#30405e}
    input,select,textarea{
      width:100%;border:1px solid #d7e2f7;border-radius:14px;padding:13px 14px;background:#fff;color:var(--text);
      outline:none;transition:border-color .2s, box-shadow .2s
    }
    input:focus,select:focus,textarea:focus{border-color:#87abff;box-shadow:0 0 0 4px rgba(22,93,255,.08)}
    textarea{min-height:122px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{
      padding:20px 0 34px;margin-top:10px;background:#0e2b66;color:#eaf1ff
    }
    .footer a{color:#fff}
    .footer .container{display:grid;gap:16px}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer-panel{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:22px;padding:18px}
    .footer small,.footer p,.footer li{color:#d8e4ff;line-height:1.7}
    .footer ul{padding-left:18px;margin:10px 0 0}
    .float-wrap{
      position:fixed;right:18px;bottom:18px;z-index:90;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),#3f8dff);color:#fff;box-shadow:0 16px 30px rgba(22,93,255,.24);
      border:0;cursor:pointer
    }
    .float-card{
      position:absolute;right:62px;bottom:0;width:280px;background:#fff;border:1px solid var(--line);
      border-radius:20px;box-shadow:var(--shadow);padding:16px;display:none
    }
    .float-card.open{display:block}
    .backtop{display:none}
    .reveal{opacity:0;transform:translateY(18px);transition:.45s ease}
    .reveal.show{opacity:1;transform:none}
    .banner-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .banner-grid .ai-page-image{border-radius:18px;border:1px solid var(--line);box-shadow:0 12px 28px rgba(15,37,90,.08)}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.flow,.reviews,.price-list,.footer-top,.split,.article-list,.banner-grid,.case{grid-template-columns:1fr}
      .navlinks{display:none;position:absolute;left:0;right:0;top:72px;background:rgba(247,250,255,.98);padding:14px 16px;border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(15,37,90,.08)}
      .navlinks.open{display:flex;flex-direction:column;align-items:flex-start}
      .menu-toggle{display:inline-flex}
      .hero-card{padding:28px}
      .hero-meta{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
      .table-wrap{overflow-x:auto}
      .step:after{display:none}
    }