:root{
      --bg:#fffaf7;
      --bg2:#fff2ee;
      --card:#ffffff;
      --text:#1f2937;
      --muted:#6b7280;
      --brand:#b61f23;
      --brand2:#e5483f;
      --line:#ead8d2;
      --shadow:0 18px 50px rgba(182,31,35,.10);
      --radius:22px;
      --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:radial-gradient(circle at top left,#fff2ef 0,#fffaf7 32%,#fff 100%);color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(255,250,247,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(234,216,210,.8)}
    .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:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px}
    .brand strong{display:block;font-size:18px;line-height:1.2}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px 14px;align-items:center}
    .nav-links a{font-size:14px;color:#374151;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover,.nav-links a:focus-visible{background:#fff;border-color:var(--line);box-shadow:0 8px 24px rgba(17,24,39,.06);transform:translateY(-1px)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.feature-card,.quote-card,.faq-item,.review-card,.case-card,.article-card,.compare-card,.form-card,.network-card,.price-card,.timeline-card{background:linear-gradient(180deg,#fff,#fff8f6);border:1px solid rgba(234,216,210,.9);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;background:radial-gradient(circle,rgba(229,72,63,.18),transparent 70%)}
    .hero-main:before{width:260px;height:260px;right:-70px;top:-60px}
    .hero-main:after{width:180px;height:180px;right:110px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand);font-weight:700;background:rgba(182,31,35,.08);border:1px solid rgba(182,31,35,.14);padding:7px 12px;border-radius:999px}
    h1{margin:16px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{font-size:16px;color:#4b5563;max-width:62ch;margin:0 0 18px}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:14px;padding:13px 18px;font-weight:700;transition:.2s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 30px rgba(182,31,35,.22)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}
    .metric{padding:16px;background:rgba(255,255,255,.7);border:1px solid rgba(234,216,210,.8);border-radius:18px}
    .metric strong{display:block;font-size:22px;color:var(--brand);line-height:1.1}
    .metric span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .hero-side .panel{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .hero-side h2{font-size:18px;margin:0 0 8px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:7px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#374151}
    section{padding:20px 0}
    .section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;margin-bottom:14px}
    .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(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .feature-card,.case-card,.review-card,.article-card,.compare-card,.network-card,.price-card,.timeline-card,.form-card{padding:20px}
    .feature-card h3,.case-card h3,.review-card h3,.article-card h3,.compare-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.case-card p,.review-card p,.article-card p,.network-card p,.price-card p,.timeline-card p{margin:0;color:#4b5563}
    .icon-badge{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(182,31,35,.12),rgba(229,72,63,.08));color:var(--brand);font-weight:800;margin-bottom:12px}
    .stats-line{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .stats-line i{font-style:normal;padding:7px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#374151}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #f0e4df;vertical-align:top}
    th{background:#fff5f2;color:#7f1d1d;font-size:14px}
    tr:last-child td{border-bottom:none}
    .rating{font-size:20px;font-weight:800;color:var(--brand)}
    .step-list{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);position:relative}
    .step strong{display:block;font-size:14px;color:var(--brand);margin-bottom:8px}
    .step h3{margin:0 0 8px;font-size:17px}
    .step p{margin:0;color:#4b5563}
    .step:after{content:"";position:absolute;right:16px;top:16px;width:28px;height:28px;border-radius:50%;background:rgba(182,31,35,.08)}
    .reviews,.articles,.cases,.faq-list,.timeline-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    details.faq-item{padding:0;overflow:hidden}
    details.faq-item summary{list-style:none;padding:18px 20px;font-weight:700;cursor:pointer}
    details.faq-item summary::-webkit-details-marker{display:none}
    details.faq-item .faq-body{padding:0 20px 18px;color:#4b5563}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-weight:700;font-size:14px}
    input,select,textarea{width:100%;border:1px solid #decac4;background:#fff;border-radius:14px;padding:12px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(182,31,35,.55);box-shadow:0 0 0 4px rgba(182,31,35,.08)}
    .full{grid-column:1/-1}
    .footer-top{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;padding:24px 0}
    footer{background:#fff7f5;border-top:1px solid #ead8d2;color:#374151;margin-top:12px}
    footer a{color:#7f1d1d}
    .muted{color:var(--muted)}
    .floating{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:10px;z-index:60}
    .float-btn{width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;box-shadow:0 12px 24px rgba(17,24,39,.12)}
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.step-list,.reviews,.articles,.cases,.timeline-list,.footer-top{grid-template-columns:1fr}
      .hero-metrics,.form-grid{grid-template-columns:1fr 1fr}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:70px;background:#fff;padding:14px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 20px))}
      .hero-main{padding:22px}
      .section-head{flex-direction:column;align-items:flex-start}
      .hero-metrics,.form-grid{grid-template-columns:1fr}
      h1{font-size:30px}
    }