:root{
      --bg:#fff7f3;
      --panel:#ffffff;
      --panel-2:#fff1eb;
      --line:#f1d7cf;
      --text:#231815;
      --muted:#725b55;
      --brand:#b61515;
      --brand-2:#ff5a3d;
      --accent:#ffcfb8;
      --shadow:0 18px 45px rgba(182,21,21,.12);
      --radius:20px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,90,61,.14), transparent 32%),
        radial-gradient(circle at top right, rgba(182,21,21,.10), transparent 28%),
        linear-gradient(180deg,#fffaf8 0%, #fff6f1 36%, #fffdfb 100%);
      line-height:1.65;
      overflow-x:hidden;
    }
    a{color:var(--brand);text-decoration:none}
    a:hover{color:#8f0f0f}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .skip{position:absolute;left:-999px;top:auto}
    .skip:focus{left:16px;top:16px;background:#fff;padding:10px 14px;border-radius:10px;z-index:1000}
    header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(255,250,248,.84);
      border-bottom:1px solid rgba(241,215,207,.8);
    }
    .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;padding:4px;border:1px solid var(--line)}
    .brand strong{display:block;font-size:1.03rem;line-height:1.1}
    .brand span{display:block;font-size:.82rem;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center;justify-content:flex-end}
    .nav-links a{padding:9px 12px;border-radius:999px;color:var(--text);font-size:.94rem}
    .nav-links a:hover,.nav-links a.active{background:var(--brand);color:#fff}
    .hero{
      position:relative;
      padding:52px 0 28px;
      overflow:hidden;
    }
    .hero::before,.hero::after{
      content:"";position:absolute;border-radius:50%;pointer-events:none;
      background:radial-gradient(circle, rgba(255,90,61,.16) 0, rgba(255,90,61,0) 70%);
    }
    .hero::before{width:340px;height:340px;right:-90px;top:-70px}
    .hero::after{width:260px;height:260px;left:-120px;bottom:-60px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch
    }
    .hero-card,.panel,.glass{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,248,244,.96));
      border:1px solid rgba(241,215,207,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{padding:30px}
    h1{
      margin:0 0 14px;font-size:clamp(2rem, 4.4vw, 3.7rem);line-height:1.08;letter-spacing:-.03em
    }
    .lead{margin:0 0 18px;color:var(--muted);font-size:1.02rem;max-width:62ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;
      transition:.24s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 10px 24px rgba(182,21,21,.22)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--muted);font-size:.92rem}
    .hero-side{display:grid;gap:14px}
    .side-top{padding:22px}
    .stats{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px
    }
    .stat{
      background:linear-gradient(180deg,#fff,#fff8f4);border:1px solid var(--line);border-radius:16px;padding:14px
    }
    .stat b{display:block;font-size:1.25rem;color:var(--brand)}
    .stat span{color:var(--muted);font-size:.88rem}
    .side-box{padding:18px}
    .side-box h2,.section h2{margin:0 0 10px;font-size:clamp(1.4rem,2.4vw,2.1rem)}
    .section{padding:18px 0}
    .section .intro{color:var(--muted);max-width:70ch;margin:0 0 18px}
    .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(241,215,207,.95);border-radius:18px;padding:18px;box-shadow:0 10px 28px rgba(80,20,20,.06);transition:transform .22s ease, box-shadow .22s ease
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(80,20,20,.10)}
    .card h3{margin:0 0 8px;font-size:1.06rem}
    .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(182,21,21,.12), rgba(255,90,61,.14));color:var(--brand);
      margin-bottom:12px;font-weight:800
    }
    .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:16px;background:#fff;border:1px solid var(--line)}
    .step .num{flex:0 0 auto;width:34px;height:34px;border-radius:999px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800}
    .table-wrap{overflow-x: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;border-bottom:1px solid #f3e2dc;text-align:left;vertical-align:top}
    th{background:#fff5f1;color:#402724;font-size:.95rem}
    tr:last-child td{border-bottom:none}
    .rating{
      display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:stretch
    }
    .rating-box{
      padding:22px;border-radius:18px;background:linear-gradient(135deg,#fff,#fff4f0);border:1px solid var(--line)
    }
    .score{font-size:2.2rem;color:var(--brand);font-weight:900;line-height:1}
    .stars{color:#f59b23;font-size:1.15rem;letter-spacing:2px}
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chips .tag{background:#fff7f4}
    .form{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
    }
    .field{display:flex;flex-direction:column;gap:7px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:.95rem}
    input,select,textarea{
      width:100%;border:1px solid #dfc9c1;background:#fff;border-radius:14px;padding:12px 14px;
      font:inherit;color:var(--text);outline:none;transition:border-color .2s ease, box-shadow .2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(182,21,21,.08)}
    textarea{min-height:120px;resize:vertical}
    .footer{
      margin-top:16px;padding:22px 0 30px;border-top:1px solid rgba(241,215,207,.9);background:rgba(255,248,244,.72)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    .footer small,.footer p,.footer a{color:#5c433d}
    .footer .links{display:flex;flex-wrap:wrap;gap:10px}
    .footer .links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .faq details{
      background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 16px
    }
    .faq summary{cursor:pointer;font-weight:700;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq details p{margin:10px 0 0;color:var(--muted)}
    .reviews .card{height:100%}
    .article-list{display:grid;gap:12px}
    .article-item{
      display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line)
    }
    .article-item span{color:var(--muted);font-size:.92rem}
    .floating{
      position:fixed;right:16px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:52px;height:52px;border:none;border-radius:16px;background:var(--brand);color:#fff;box-shadow:0 14px 28px rgba(182,21,21,.22);display:grid;place-items:center;cursor:pointer
    }
    .floating .secondary{background:#fff;color:var(--brand);border:1px solid var(--line)}
    .mobile-only{display:none}
    .service-net{display:flex;flex-wrap:wrap;gap:10px}
    .service-net .tag{background:#fff}
    .figure-box{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .figure-box img{width:100%;height:auto;display:block}
    .compare-badges{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .compare-badges .tag{justify-content:center;text-align:center}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.split,.rating,.footer-grid{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);
        border-radius:18px;padding:12px;box-shadow:0 16px 36px rgba(80,20,20,.10)
      }
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{width:100%;text-align:center}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 24px))}
      .hero{padding-top:34px}
      .hero-card,.card,.panel{border-radius:18px}
      .form{grid-template-columns:1fr}
      .stats{grid-template-columns:1fr 1fr}
      .compare-badges{grid-template-columns:1fr}
      .floating{right:12px;bottom:12px}
      .floating a,.floating button{width:48px;height:48px;border-radius:14px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease, transform .55s ease}
    .reveal.in{opacity:1;transform:none}