:root{
      --bg:#f6f4ef;
      --panel:#ffffff;
      --panel-2:#fff7f0;
      --text:#182233;
      --muted:#5a6478;
      --line:#e6e0d6;
      --brand:#ff4d5e;
      --brand-2:#ff8a00;
      --brand-3:#2457ff;
      --brand-4:#00b894;
      --shadow:0 18px 50px rgba(24,34,51,.08);
      --radius:22px;
      --radius-sm: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;background:linear-gradient(180deg,#fff 0%,#fbfaf7 18%,#f6f4ef 100%);color:var(--text);line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(246,244,239,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(230,224,214,.85)}
    .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}
    .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 10px 24px rgba(24,34,51,.08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;letter-spacing:.3px}
    .brand-text span{display:block;font-size:12px;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2b3447;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover{background:#fff;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),var(--brand-2));color:#fff;box-shadow:0 14px 30px rgba(255,77,94,.24)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(24,34,51,.12)}
    .hero{position:relative;overflow:hidden;padding:42px 0 22px}
    .hero::before,.hero::after{content:"";position:absolute;inset:auto;border-radius:999px;filter:blur(10px);pointer-events:none}
    .hero::before{width:300px;height:300px;background:radial-gradient(circle,rgba(255,77,94,.16),transparent 68%);top:-70px;right:-70px}
    .hero::after{width:260px;height:260px;background:radial-gradient(circle,rgba(36,87,255,.12),transparent 68%);bottom:0;left:-80px}
    .hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:28px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,77,94,.09);color:#b91c2e;font-weight:700;font-size:13px;margin-bottom:16px}
    h1{font-size:clamp(34px,5vw,58px);line-height:1.06;margin:0 0 16px;letter-spacing:-.8px}
    .hero p{margin:0 0 22px;color:var(--muted);max-width:56ch;font-size:16px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
    .hero-points{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#2b3447;font-size:13px;box-shadow:0 10px 24px rgba(24,34,51,.04)}
    .hero-panel{background:linear-gradient(180deg,#fff 0%,#fff8f3 100%);border:1px solid rgba(230,224,214,.92);border-radius:28px;padding:22px;box-shadow:var(--shadow)}
    .hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .metric{background:linear-gradient(180deg,#fff 0%,#fff7f0 100%);border:1px solid var(--line);border-radius:20px;padding:18px;min-height:110px}
    .metric strong{display:block;font-size:28px;line-height:1;color:var(--brand-3);margin-bottom:8px}
    .metric span{display:block;font-size:14px;font-weight:700;margin-bottom:6px}
    .metric p{margin:0;color:var(--muted);font-size:13px}
    .section{padding:26px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:62ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{background:var(--panel);border:1px solid rgba(230,224,214,.95);border-radius:var(--radius);padding:20px;box-shadow:0 10px 30px rgba(24,34,51,.05);transition:.22s ease}
    .card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(24,34,51,.1)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted)}
    .card ul{margin:0;padding-left:18px}
    .icon-dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:inline-block;margin-right:8px;box-shadow:0 0 0 6px rgba(255,77,94,.09)}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
    .timeline{display:grid;gap:14px}
    .step{display:flex;gap:14px;align-items:flex-start;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step-num{flex:0 0 auto;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand-3),#7f8cff);color:#fff;display:grid;place-items:center;font-weight:800}
    .comparison{overflow:auto;border:1px solid var(--line);border-radius:20px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #eee;vertical-align:top}
    th{background:#fff8f3;color:#1c2435}
    td strong{color:var(--brand-3)}
    .table-note{padding:14px 16px;color:var(--muted);font-size:13px;background:#fffdfb}
    .gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .gallery .card{padding:14px}
    .gallery img{width:100%;border-radius:16px;aspect-ratio:16/10;object-fit:cover;background:#f3f4f6}
    .pill-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .pricing{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price{background:linear-gradient(180deg,#fff 0%,#fff9f4 100%);border:1px solid var(--line);border-radius:24px;padding:20px;position:relative}
    .price strong{display:block;font-size:30px;color:var(--brand);margin:10px 0}
    .price ul{margin:12px 0 0;padding-left:18px}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:12px;color:#3b465b}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#ffac33;letter-spacing:1px}
    .faq{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px;box-shadow:0 10px 24px rgba(24,34,51,.04)}
    summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px;color:var(--muted)}
    .form-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:start}
    form{display:grid;gap:12px}
    .field{display:grid;gap:7px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid #dcd5cb;border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text);outline:none;transition:.2s ease}
    input:focus,select:focus,textarea:focus{border-color:#ff8a00;box-shadow:0 0 0 4px rgba(255,138,0,.12)}
    textarea{min-height:126px;resize:vertical}
    .form-side{background:linear-gradient(180deg,#fff 0%,#fff8f0 100%);border:1px solid var(--line);border-radius:26px;padding:22px}
    .contact-grid{display:grid;gap:12px}
    .contact-item{padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line)}
    .footer{margin-top:16px;background:#182233;color:#e8edf7;padding:28px 0 22px}
    .footer a{color:#ffd6b8}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .footer small{color:#b8c2d6}
    .mini-links{display:flex;flex-wrap:wrap;gap:10px}
    .mini-links a{display:inline-flex;padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.07)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 16px 28px rgba(255,77,94,.28)}
    .customer-box{position:fixed;left:16px;bottom:16px;z-index:60;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow);max-width:170px}
    .customer-box img{border-radius:14px;width:100%;height:auto}
    .backtop{position:fixed;right:16px;bottom:78px;z-index:60;opacity:0;visibility:hidden;transform:translateY(10px);transition:.2s ease}
    .backtop.show{opacity:1;visibility:visible;transform:none}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .scroll-reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 1080px){
      .hero-grid,.split,.form-wrap,.footer-grid{grid-template-columns:1fr}
      .grid-4,.grid-3,.gallery,.pricing,.reviews{grid-template-columns:repeat(2,minmax(0,1fr))}
      .nav-links{display:none}
      .nav-toggle{display:inline-flex}
      .nav.open .nav-links{display:flex;position:absolute;left:0;right:0;top:100%;background:rgba(255,255,255,.98);padding:14px 16px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}
      .nav.open .nav-actions{margin-left:auto}
      .mobile-only{display:block}
    }
    @media (max-width: 720px){
      .container{width:min(var(--container),calc(100% - 24px))}
      .hero{padding-top:28px}
      .section-head{flex-direction:column;align-items:flex-start}
      .grid-4,.grid-3,.gallery,.pricing,.reviews,.hero-metrics{grid-template-columns:1fr}
      .nav{position:relative}
      .nav-actions .btn-ghost{display:none}
      .customer-box{display:none}
      .floating{right:12px;bottom:12px}
      .btn{padding:11px 16px}
      h1{font-size:clamp(30px,9vw,44px)}
    }