:root{
      --bg:#f7f8fc;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#142033;
      --muted:#607089;
      --line:#dbe4f3;
      --brand:#2563eb;
      --brand2:#14b8a6;
      --brand3:#7c3aed;
      --shadow:0 18px 40px rgba(22,38,68,.08);
      --shadow2:0 10px 24px rgba(37,99,235,.14);
      --radius:22px;
      --radius2:16px;
      --container: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 28%),
        radial-gradient(circle at top right, rgba(20,184,166,.12), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, #f5f8ff 48%, #f7f8fc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:40;
      backdrop-filter:blur(14px);
      background:rgba(247,248,252,.88);
      border-bottom:1px solid rgba(219,228,243,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:14px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;border-radius:12px;object-fit:cover;box-shadow:0 8px 18px rgba(37,99,235,.14)}
    .brand h2{font-size:18px;margin:0;line-height:1.1}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .menu{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{color:var(--text);font-size:14px;padding:8px 10px;border-radius:999px}
    .menu a:hover{background:#e9f1ff;color:#1540aa}
    .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;font-size:14px;cursor:pointer;
      transition:.25s ease;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#4f8cff);color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-2px);filter:saturate(1.05)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#bfd0f0;transform:translateY(-2px)}
    .mobile-toggle{display:none}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-card,.glass-card{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.92));
      border:1px solid rgba(219,228,243,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{padding:30px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:linear-gradient(135deg, rgba(37,99,235,.10), rgba(20,184,166,.10));
      color:#23438f;font-weight:700;font-size:13px;
    }
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.06;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.85;max-width:56ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{
      display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px
    }
    .point{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#fff);
      border:1px solid var(--line)
    }
    .point b{display:block;font-size:18px;margin-bottom:6px}
    .point span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{display:grid;gap:14px}
    .mini-panel{padding:20px}
    .mini-panel h3{margin:0 0 12px;font-size:18px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{
      padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .stat strong{display:block;font-size:26px;line-height:1.1;color:#14306b}
    .stat small{color:var(--muted);display:block;margin-top:6px;line-height:1.5}
    .section{padding:16px 0 8px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:26px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.75}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .card{
      background:linear-gradient(180deg,#fff, #fbfcff);
      border:1px solid var(--line);
      border-radius:20px;
      padding:18px;
      box-shadow:0 8px 22px rgba(18,35,63,.05);
      transition:.24s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .card h3{margin:6px 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.78}
    .icon{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(37,99,235,.14), rgba(20,184,166,.16));
      color:#1d4ed8;font-weight:900
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#35507a;font-size:13px
    }
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{
      position:relative;padding:18px 16px 16px;background:#fff;border:1px solid var(--line);border-radius:20px
    }
    .step .num{
      width:34px;height:34px;border-radius:999px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),#57a0ff);color:#fff;font-weight:800;margin-bottom:10px
    }
    .compare-wrap,.faq-wrap,.table-wrap{overflow-x:auto;border-radius:20px}
    table{
      width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);
      min-width:860px;border-radius:20px;overflow:hidden
    }
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #edf2fb;vertical-align:top}
    th{background:#f5f8ff;color:#1c2d4c;font-size:14px}
    td{color:var(--muted);font-size:14px;line-height:1.7}
    tr:last-child td{border-bottom:none}
    .highlight{color:#0f3f98;font-weight:700}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .cta-box{
      background:linear-gradient(135deg, #0f172a 0%, #163b8c 46%, #1a8bb1 100%);
      color:#fff;border:none;overflow:hidden;position:relative
    }
    .cta-box p,.cta-box li{color:rgba(255,255,255,.86)}
    .cta-box .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.18);color:#fff}
    .cta-box .btn-ghost:hover{background:rgba(255,255,255,.18)}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#f59e0b;letter-spacing:1px}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:14px;align-items:start}
    form{display:grid;gap:12px}
    label{font-size:14px;color:#1d2d49;font-weight:700}
    input,select,textarea{
      width:100%;padding:12px 14px;border-radius:14px;border:1px solid #cfd9ea;
      background:#fff;color:var(--text);outline:none;font:inherit
    }
    input:focus,select:focus,textarea:focus{border-color:#6ba2ff;box-shadow:0 0 0 4px rgba(37,99,235,.10)}
    textarea{min-height:120px;resize:vertical}
    .form-note{color:var(--muted);font-size:13px;line-height:1.7;margin:0}
    .faq-item{
      background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden
    }
    .faq-q{
      width:100%;text-align:left;border:none;background:#fff;padding:16px 18px;font:inherit;font-weight:800;color:#1a2c49;
      display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer
    }
    .faq-a{display:none;padding:0 18px 16px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article-list{display:grid;gap:10px}
    .article-item{
      padding:14px 16px;border-radius:16px;border:1px solid var(--line);background:#fff;
      display:flex;justify-content:space-between;gap:12px;align-items:center
    }
    .article-item span{color:var(--muted);font-size:13px}
    footer{
      padding:18px 0 24px;
      color:#173055;
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:14px}
    .footer-card{
      background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px
    }
    .contact-lines{display:grid;gap:10px;color:var(--muted);line-height:1.7}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);color:#173055
    }
    .float-btn.primary{background:linear-gradient(135deg,var(--brand),#53a0ff);color:#fff;border:none}
    .side-menu{display:none}
    .scrollbar-hide::-webkit-scrollbar{height:8px}
    .scrollbar-hide::-webkit-scrollbar-thumb{background:#cdd8ea;border-radius:999px}
    .muted{color:var(--muted)}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#f4f8ff;border:1px solid var(--line);color:#26406d;font-size:12px;font-weight:700}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:90px 1fr;gap:14px;align-items:start;padding:14px 0;border-bottom:1px dashed #dbe4f3}
    .timeline-item:last-child{border-bottom:none}
    .timeline-item b{color:#123268}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .accent{
      background:linear-gradient(135deg, rgba(37,99,235,.08), rgba(124,58,237,.08));
      border:1px solid rgba(37,99,235,.16)
    }
    .logo-banner{
      display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:center
    }
    .img-card{overflow:hidden}
    .img-card img{width:100%;height:auto;border-radius:18px}
    .small{font-size:12px}
    @media (max-width: 1024px){
      .hero-grid,.form-grid,.footer-grid,.two-col,.logo-banner,.articles,.reviews,.grid-4,.grid-3,.workflow{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .menu,.nav-actions .btn-ghost{display:none}
      .mobile-toggle{display:inline-flex}
      .side-menu{
        display:none;padding:0 0 14px
      }
      .side-menu.open{display:block}
      .side-menu .menu{justify-content:flex-start;gap:10px;padding:10px 0 0}
      .hero{padding-top:24px}
      .hero-card,.mini-panel,.card,.footer-card{padding:16px}
      .hero-grid,.form-grid,.footer-grid,.two-col,.logo-banner,.articles,.reviews,.grid-4,.grid-3,.workflow{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      table{min-width:760px}
      .timeline-item{grid-template-columns:1fr}
      .floating{right:12px;bottom:12px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.visible{opacity:1;transform:none}