:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f2f6ff;
      --text:#122033;
      --muted:#5d6b7f;
      --line:#dbe5f2;
      --brand:#2f6bff;
      --brand-2:#8a5cff;
      --brand-3:#18c5a7;
      --accent:#ff8c42;
      --shadow:0 16px 40px rgba(31,61,124,.10);
      --radius:20px;
      --radius-sm:14px;
      --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(47,107,255,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(24,197,167,.12), transparent 26%),
        linear-gradient(180deg, #fbfcff 0%, #f6f8fc 36%, #f8fbff 100%);
    }
    a{color:var(--brand);text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(219,229,242,.7);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      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;border:1px solid var(--line);padding:5px;box-shadow:0 8px 18px rgba(47,107,255,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted);margin-top:3px}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:10px}
    .nav-links a:hover,.nav-links a:focus{background:rgba(47,107,255,.08);color:var(--brand)}
    .nav-cta{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;
    }
    .btn-primary{color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 14px 30px rgba(47,107,255,.24)}
    .btn-secondary{color:var(--text);background:#fff;border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(31,61,124,.14)}
    .hero{
      padding:38px 0 18px;
      position:relative;
      overflow:hidden;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:24px;align-items:stretch;
    }
    .hero-copy,.hero-side,.card,.panel,.faq-item,.review,.timeline-item,.article,.contact-card,.compare-box,.quote{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(219,229,242,.88);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-copy{
      padding:34px;
      position:relative;
      overflow:hidden;
    }
    .hero-copy::after{
      content:"";position:absolute;inset:auto -60px -80px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(47,107,255,.20), transparent 65%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;background:rgba(47,107,255,.08);color:var(--brand);font-size:13px;font-weight:700;
    }
    h1{font-size:clamp(32px,4vw,56px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:58ch;margin:0 0 22px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .quick-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .tag{padding:9px 12px;border-radius:999px;background:linear-gradient(180deg,#fff, #f4f8ff);border:1px solid var(--line);font-size:13px;color:#32435a}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-stat{
      padding:18px;border-radius:18px;background:linear-gradient(135deg, rgba(47,107,255,.08), rgba(24,197,167,.08));
      border:1px solid rgba(47,107,255,.14);
    }
    .mini-stat strong{display:block;font-size:28px;line-height:1;color:var(--text)}
    .mini-stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .hero-tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .tile{
      padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line);min-height:92px
    }
    .tile b{display:block;font-size:15px;margin-bottom:6px}
    .tile p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
    section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:14px;align-items:end;margin-bottom:16px}
    .section-head h2{font-size:28px;margin:0}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .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{padding:20px}
    .card h3,.panel h3,.review h3,.article h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.review p,.article p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(47,107,255,.12), rgba(138,92,255,.12));
      color:var(--brand);font-weight:800;margin-bottom:14px;
    }
    .metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .metric{padding:22px}
    .metric strong{display:block;font-size:28px}
    .metric span{display:block;margin-top:8px;color:var(--muted);line-height:1.7}
    .panel{padding:22px}
    .bullets{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .bullets li{padding-left:22px;position:relative;color:var(--text);line-height:1.7}
    .bullets li::before{content:"";position:absolute;left:0;top:.58em;width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-3))}
    .workflow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{padding:20px}
    .step .num{font-size:13px;font-weight:800;color:var(--brand);margin-bottom:10px}
    .compare{width:100%;border-collapse:separate;border-spacing:0}
    .compare th,.compare td{padding:14px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left;font-size:14px}
    .compare th{background:#f6f9ff;color:#233247;position:sticky;top:74px}
    .compare-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:rgba(24,197,167,.12);color:#117a67;font-size:12px;font-weight:700}
    .highlight{background:linear-gradient(135deg, rgba(47,107,255,.08), rgba(255,140,66,.10))}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
      padding:18px 20px;border:0;background:transparent;color:var(--text);font-size:16px;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-a{display:none;padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .faq-item.active .faq-a{display:block}
    .faq-item.active .faq-q{color:var(--brand)}
    .reviews,.articles,.service-network,.tags-cloud{display:grid;gap:16px}
    .review{padding:20px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .stars{color:#ffb400;letter-spacing:2px;font-size:15px}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:18px 20px;display:grid;grid-template-columns:92px 1fr;gap:16px;align-items:start}
    .timeline-item .date{color:var(--brand);font-weight:800}
    .services-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .cloud-tag{padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:#2a3950;font-size:13px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#2a3950}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;
      padding:13px 14px;font:inherit;color:var(--text);outline:none;
    }
    textarea{min-height:124px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(47,107,255,.65);box-shadow:0 0 0 4px rgba(47,107,255,.08)}
    .full{grid-column:1/-1}
    .contact-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .contact-card{padding:22px}
    .contact-list{display:grid;gap:12px;margin-top:14px}
    .contact-line{display:flex;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14px}
    .contact-line:last-child{border-bottom:0}
    .footer{
      margin-top:18px;padding:24px 0 30px;border-top:1px solid rgba(219,229,242,.9);background:#f3f7fd;color:#203044
    }
    .footer a{color:#203a6d}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer-note{font-size:13px;color:#5f6d80;line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:10px;background:#fff;border:1px solid var(--line)}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 28px rgba(47,107,255,.24);border:0;cursor:pointer
    }
    .float-panel{
      display:none;position:absolute;right:0;bottom:62px;width:280px;padding:14px;background:#fff;border:1px solid var(--line);
      border-radius:18px;box-shadow:var(--shadow)
    }
    .float-panel.open{display:block}
    .float-panel img{width:100%;border-radius:14px;border:1px solid var(--line);background:#fff}
    .article-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .article{padding:20px}
    .article .meta{display:flex;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);margin-bottom:10px}
    .section-divider{height:1px;background:linear-gradient(90deg,transparent, rgba(47,107,255,.24), transparent);margin:8px 0}
    .scroll-reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .scroll-reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.metrics,.workflow,.contact-layout,.footer-grid,.article-list{grid-template-columns:1fr 1fr}
      .hero-copy{grid-column:1/-1}
      .hero-side{grid-column:1/-1}
      .compare th{top:68px}
    }
    @media (max-width: 768px){
      .nav-links{
        display:none;position:absolute;left:20px;right:20px;top:74px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;
        box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:4px
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 12px}
      .menu-toggle{display:inline-flex}
      .nav-cta{display:none}
      .hero{padding-top:20px}
      .hero-copy,.hero-side,.card,.panel,.faq-q,.review,.timeline-item,.article,.contact-card,.compare-box{padding:18px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.metrics,.workflow,.contact-layout,.footer-grid,.article-list,.form-grid,.timeline-item{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .timeline-item{grid-template-columns:1fr}
      .compare th,.compare td{min-width:160px}
      .mobile-only{display:block}
    }