:root{
      --bg:#f6f8fb;
      --surface:#ffffff;
      --surface-2:#f3f7ff;
      --surface-3:#eef4ff;
      --text:#1c2333;
      --muted:#5e6b84;
      --line:#dce4f2;
      --primary:#4f63ff;
      --primary-2:#7d4dff;
      --accent:#10c7b8;
      --warm:#ffb347;
      --shadow:0 18px 40px rgba(31, 54, 108, .10);
      --radius:22px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: Inter, PingFang SC, Microsoft YaHei, Helvetica Neue, Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 20% 10%, rgba(79,99,255,.10), transparent 22%),
        radial-gradient(circle at 80% 0%, rgba(16,199,184,.10), transparent 20%),
        linear-gradient(180deg, #fbfcff 0%, #f5f8fd 36%, #f7f9fc 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(16px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(220,228,242,.7);
    }
    .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:44px;height:44px;border-radius:12px;object-fit:contain;background:#fff;border:1px solid var(--line);box-shadow:0 8px 20px rgba(79,99,255,.08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;line-height:1.2}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .menu{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:14px;color:#31415d;padding:9px 11px;border-radius:10px;transition:.2s}
    .menu a:hover{background:rgba(79,99,255,.08);color:var(--primary)}
    .home-link{font-weight:700;color:var(--primary);border:1px solid rgba(79,99,255,.18);background:rgba(79,99,255,.06)}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.testimonial,.article,.form-wrap,.table-wrap,.info-box{
      background:var(--surface);
      border:1px solid rgba(220,228,242,.92);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none
    }
    .hero-main::before{width:220px;height:220px;right:-70px;top:-70px;background:radial-gradient(circle, rgba(79,99,255,.18), transparent 60%)}
    .hero-main::after{width:160px;height:160px;left:-40px;bottom:-60px;background:radial-gradient(circle, rgba(16,199,184,.18), transparent 60%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(79,99,255,.08);color:var(--primary);font-size:13px;font-weight:700}
    h1{font-size:clamp(30px,5vw,50px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{font-size:16px;line-height:1.9;color:var(--muted);max-width:52ch;margin:0}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .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:.22s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 14px 30px rgba(79,99,255,.24)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-stat{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#eef4ff);border:1px solid #dce6fb}
    .stat strong{display:block;font-size:24px;line-height:1.1}
    .stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.5}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 11px;border-radius:999px;background:#f4f7fe;border:1px solid #dbe4f6;color:#35506f;font-size:13px}
    section{padding:14px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:26px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);line-height:1.8;max-width:72ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li,.article p,.testimonial p,.faq-item p,.info-box p{color:var(--muted);line-height:1.8}
    .icon-dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--primary))}
    .card-head{display:flex;align-items:center;gap:10px;margin-bottom:12px}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .metric{padding:18px;background:linear-gradient(180deg,#fff,#f7faff);border:1px solid var(--line);border-radius:18px}
    .metric strong{display:block;font-size:28px;color:var(--primary);line-height:1.1}
    .metric span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.5}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
    .list{margin:0;padding-left:18px}
    .list li{margin:8px 0}
    .steps{counter-reset:step}
    .step{position:relative;padding-left:58px}
    .step::before{
      counter-increment:step;content:counter(step);
      position:absolute;left:20px;top:18px;width:26px;height:26px;border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
      display:grid;place-items:center;font-weight:700;font-size:13px
    }
    .step h3{margin-left:0}
    .table-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f6f9ff;color:#243247;font-size:14px}
    td{font-size:14px;color:#3b4a63}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:rgba(16,199,184,.10);color:#0f7f77;font-weight:700;font-size:12px}
    .rating{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .stars{color:#ffb400;letter-spacing:2px}
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:start;padding:16px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .timeline-item strong{color:var(--primary)}
    .service-network{display:flex;flex-wrap:wrap;gap:10px}
    .service-network span{padding:9px 12px;border-radius:12px;background:#f3f7ff;border:1px solid #dce6fb;color:#38506e;font-size:13px}
    .quote{border-left:4px solid var(--primary);padding-left:14px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article h3{margin:0 0 10px;font-size:17px}
    .article .meta{font-size:12px;color:#7a879c;margin-bottom:10px}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;text-align:left;border:0;background:transparent;padding:18px 20px;font:inherit;display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--text);cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease,padding .26s ease;border-top:1px solid transparent}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px;border-top-color:var(--line)}
    .faq-item.open .faq-q .chev{transform:rotate(180deg)}
    .chev{transition:.2s;color:var(--primary)}
    .testimonials{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .testimonial .role{font-size:13px;color:var(--primary);font-weight:700;margin-bottom:10px}
    .articles-list{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
    .form-wrap{padding:20px}
    form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    label{display:grid;gap:8px;font-size:14px;color:#324055;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;
      padding:12px 14px;font:inherit;color:var(--text);outline:none;transition:.2s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(79,99,255,.55);box-shadow:0 0 0 4px rgba(79,99,255,.10)}
    .footer{
      margin-top:14px;
      padding:24px 0 28px;
      background:linear-gradient(180deg,#f6f8fd,#eef3fb);
      border-top:1px solid rgba(220,228,242,.9);
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer a{color:#28446f}
    .footer h3{margin:0 0 12px;font-size:16px}
    .footer p,.footer li{color:#5d6a81;line-height:1.8}
    .copyright{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:#6d7890;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .floating a,.to-top{
      width:50px;height:50px;border-radius:16px;border:1px solid rgba(79,99,255,.15);
      background:#fff;box-shadow:0 12px 28px rgba(26,54,107,.14);display:grid;place-items:center;
      color:var(--primary);font-weight:800;cursor:pointer
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.split,.grid-4,.metrics,.articles,.testimonials,.articles-list,.footer-grid{grid-template-columns:1fr}
      .grid-3{grid-template-columns:1fr 1fr}
      .nav-toggle{display:inline-flex}
      .menu{display:none;width:100%;padding:12px 0 0}
      .menu.open{display:flex;justify-content:flex-start}
      .nav{flex-wrap:wrap}
      .hero-main{padding:26px}
      .timeline-item{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 20px))}
      .grid-3,.form-grid{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
      .mini-stat{grid-template-columns:1fr 1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      h1{font-size:30px}
    }