:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel-2:#f1f5ff;
      --text:#182235;
      --muted:#5f6b85;
      --line:#dbe3f1;
      --brand:#2d5bff;
      --brand-2:#ff6b4a;
      --brand-3:#16b7a0;
      --shadow:0 18px 45px rgba(24,34,53,.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,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,rgba(45,91,255,.08),transparent 30%),radial-gradient(circle at top right,rgba(255,107,74,.09),transparent 28%),linear-gradient(180deg,#f9fbff 0%,#f5f7fc 100%);color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(246,247,251,.88);backdrop-filter:blur(16px);border-bottom:1px solid rgba(219,227,241,.75)}
    .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;object-fit:contain;background:#fff;border-radius:12px;padding:6px;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.2}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}
    .nav-links a{font-size:13px;color:var(--text);padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover{background:rgba(45,91,255,.08);color:var(--brand)}
    .nav-actions{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;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#7a55ff);color:#fff;box-shadow:0 12px 30px rgba(45,91,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(45,91,255,.28)}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:#b8c8ef}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:38px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.card,.section-card,.form-card,.faq-card,.quote-card,.review-card,.metric,.price-card,.compare-card{background:linear-gradient(180deg,rgba(255,255,255,.95),#fff);border:1px solid rgba(219,227,241,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero-main:before{width:240px;height:240px;background:radial-gradient(circle,rgba(45,91,255,.16),transparent 70%);right:-80px;top:-80px}
    .hero-main:after{width:180px;height:180px;background:radial-gradient(circle,rgba(255,107,74,.16),transparent 70%);left:-70px;bottom:-80px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:rgba(45,91,255,.09);color:var(--brand);font-size:12px;font-weight:800}
    h1{font-size:clamp(30px,4vw,52px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.03em}
    .lead{font-size:16px;color:var(--muted);max-width:56ch}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}
    .point{padding:14px;border-radius:16px;background:linear-gradient(180deg,#f6f8ff,#fff);border:1px solid var(--line)}
    .point strong{display:block;font-size:20px;color:var(--brand);line-height:1.1}
    .point span{font-size:13px;color:var(--muted)}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px}
    .quick-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text)}
    .hero-side{padding:22px;display:grid;gap:14px;align-content:start}
    .mini-panel{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f4f7ff,#fff);border:1px solid var(--line)}
    .mini-panel h2,.section-title{font-size:24px;margin:0 0 10px;line-height:1.2}
    .mini-panel p,.section-desc{margin:0;color:var(--muted)}
    .metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:18px 0 8px}
    .metric{padding:18px}
    .metric b{display:block;font-size:24px}
    .metric span{font-size:13px;color:var(--muted)}
    section{padding:18px 0}
    .section-card{padding:24px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:18px}
    .section-head p{margin:0;color:var(--muted);max-width:60ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .service-card,.step-card,.case-card,.review-card,.price-card,.faq-card,.compare-card{padding:18px}
    .service-card h3,.step-card h3,.case-card h3,.review-card h3,.price-card h3{margin:8px 0 8px;font-size:18px}
    .service-card p,.step-card p,.case-card p,.review-card p,.price-card p{margin:0;color:var(--muted)}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(45,91,255,.15),rgba(255,107,74,.12));color:var(--brand);font-weight:800}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:88px 1fr;gap:12px;align-items:start;padding:14px 0;border-top:1px dashed var(--line)}
    .timeline-item:first-child{border-top:0;padding-top:0}
    .timeline-item strong{color:var(--brand)}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:720px;background:#fff}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
    th{background:#f6f8ff;color:var(--text)}
    .badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;background:rgba(22,183,160,.12);color:#0d7d6d;font-size:12px;font-weight:700}
    .faq-list{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
    summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 18px 16px;color:var(--muted)}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .quote{font-size:15px;color:var(--text)}
    .quote span{color:var(--muted)}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;justify-content:space-between;gap:16px;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:#fff}
    .article-item b{display:block;margin-bottom:4px}
    .article-item small{color:var(--muted)}
    .tags-cloud,.partners{display:flex;flex-wrap:wrap;gap:10px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s ease}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(45,91,255,.55);box-shadow:0 0 0 4px rgba(45,91,255,.08)}
    .footer{margin-top:18px;padding:22px 0 28px;border-top:1px solid var(--line);background:rgba(255,255,255,.65)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
    .footer p,.footer a,.footer li{color:var(--muted)}
    .footer h3{margin:0 0 10px}
    .footer .links{display:flex;flex-wrap:wrap;gap:10px}
    .footer .links a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .floating a,.floating button{border:0;border-radius:999px;padding:12px 14px;background:#fff;color:var(--text);box-shadow:0 12px 28px rgba(24,34,53,.12);border:1px solid var(--line);font-weight:700;cursor:pointer}
    .floating .em{background:linear-gradient(135deg,var(--brand-2),#ff9b52);color:#fff;border-color:transparent}
    .reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}
    .hero-side .ai-page-image,.case-gallery .ai-page-image{border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:0 14px 30px rgba(24,34,53,.08)}
    .case-gallery{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
    .images-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .tiny{font-size:12px;color:var(--muted)}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.reviews,.footer-grid,.case-gallery,.metrics{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{display:flex;flex-direction:column;align-items:flex-start;position:absolute;left:16px;right:16px;top:66px;background:#fff;padding:14px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav{position:relative}
      .form-grid{grid-template-columns:1fr}
      .images-row{grid-template-columns:1fr}
      .desktop-only{display:none}
      .mobile-only{display:block}
    }