:root{
      --bg:#fff8f4;
      --bg2:#fff1ea;
      --card:#ffffff;
      --text:#2d2322;
      --muted:#6a5b57;
      --primary:#d7261e;
      --primary2:#ff5a3d;
      --line:#efd7d0;
      --shadow:0 18px 50px rgba(187, 50, 28, .10);
      --shadow2:0 10px 24px rgba(140, 36, 18, .12);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      background:
        radial-gradient(circle at top left, rgba(255, 126, 94, .12), transparent 28%),
        radial-gradient(circle at top right, rgba(215, 38, 30, .10), transparent 24%),
        linear-gradient(180deg, var(--bg) 0%, #fffdfb 38%, #fff7f2 100%);
      color:var(--text);
      line-height:1.65;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(255,248,244,.86);
      border-bottom:1px solid rgba(239,215,208,.85);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .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;box-shadow:0 8px 20px rgba(0,0,0,.08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand-text span{display:block;font-size:12px;color:var(--muted)}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:14px;padding:10px 12px;cursor:pointer;
    }
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{
      font-size:14px;color:#4a3d3a;padding:10px 2px;position:relative;
    }
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:4px;width:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:.25s ease;border-radius:999px;
    }
    .nav-links a:hover::after,.nav-links a:focus::after{width:100%}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:14px 20px;font-weight:700;cursor:pointer;
      transition:transform .22s ease, box-shadow .22s ease, background .22s ease, color .22s ease;
      will-change:transform;
    }
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 28px rgba(215,38,30,.20)}
    .btn-ghost{background:#fff;color:var(--primary);border:1px solid #f0c4bc}
    .hero{
      padding:54px 0 28px;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch;
    }
    .hero-panel,.glass-panel{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,248,244,.92));
      border:1px solid rgba(239,215,208,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
    }
    .hero-panel{padding:30px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;background:#fff2ee;color:var(--primary);font-size:13px;font-weight:700;
      border:1px solid #ffd7cf;
    }
    h1{margin:18px 0 14px;font-size:clamp(32px,4vw,58px);line-height:1.08;letter-spacing:-.02em}
    .lead{font-size:17px;color:#4e403d;max-width:42rem}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .hero-metrics{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:24px
    }
    .metric{
      background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;
      box-shadow:0 10px 24px rgba(177, 58, 32, .06);
    }
    .metric strong{display:block;font-size:26px;color:var(--primary)}
    .metric span{display:block;color:var(--muted);font-size:13px}
    .hero-side{display:grid;gap:16px}
    .side-card{padding:22px}
    .side-card h2,.section-title h2{margin:0;font-size:clamp(24px,2.2vw,36px);line-height:1.15}
    .section-title p{margin:10px 0 0;color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .tag{
      background:#fff3ef;border:1px solid #f3c8bf;color:#7d3c2f;border-radius:999px;padding:8px 12px;font-size:13px
    }
    .section{padding:26px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom: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(--card);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 10px 24px rgba(170, 58, 30, .06);
      transition:transform .22s ease, box-shadow .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted)}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg, rgba(215,38,30,.12), rgba(255,90,61,.16));color:var(--primary);font-weight:800
    }
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .list{
      padding:0;margin:14px 0 0;list-style:none;display:grid;gap:12px
    }
    .list li{display:flex;gap:10px;align-items:flex-start;color:#463835}
    .list li::before{content:"";width:10px;height:10px;margin-top:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2));flex:0 0 auto}
    .process{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{position:relative;padding-top:18px}
    .step .num{
      display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:14px;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:800;margin-bottom:12px;
      box-shadow:0 12px 22px rgba(215,38,30,.22);
    }
    .table-wrap{overflow-x:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid #f4e3de;text-align:left;vertical-align:top}
    th{background:#fff6f2;color:#4a342f;font-size:14px}
    td{color:#534440}
    tr:last-child td{border-bottom:none}
    .score-box{
      display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:16px
    }
    .score{padding:18px;border-radius:22px;background:linear-gradient(180deg,#fff,#fff8f6);border:1px solid var(--line)}
    .score strong{display:block;font-size:30px;color:var(--primary)}
    .compare{
      display:grid;grid-template-columns:1.05fr .95fr;gap:16px
    }
    .accordion{display:grid;gap:12px}
    details{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 18px;box-shadow:0 10px 24px rgba(170,58,30,.05)
    }
    summary{
      cursor:pointer;list-style:none;padding:16px 0;font-weight:700;color:#402f2b
    }
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px;color:var(--muted)}
    .reviews{
      display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px
    }
    .review .name{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .badge{padding:6px 10px;border-radius:999px;background:#fff1ec;color:#a73924;font-size:12px;font-weight:700}
    .stars{color:#d98a00;letter-spacing:1px}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article a{display:inline-flex;margin-top:12px;color:var(--primary);font-weight:700}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .timeline .card{position:relative}
    .timeline .card::before{
      content:"";position:absolute;left:22px;top:24px;width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2))
    }
    .timeline .card{padding-top:44px}
    .media-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .media-grid .card{padding:14px}
    .media-grid img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line)}
    .form-wrap{display:grid;grid-template-columns:1fr .88fr;gap:16px}
    form{
      display:grid;gap:12px
    }
    label{font-size:14px;font-weight:700;color:#493732}
    input,select,textarea{
      width:100%;border:1px solid #e7cec7;background:#fff;border-radius:14px;padding:13px 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:#e88b7b;box-shadow:0 0 0 4px rgba(215,38,30,.08)}
    textarea{min-height:120px;resize:vertical}
    .footer{
      margin-top:26px;padding:26px 0 36px;background:linear-gradient(180deg, rgba(255,244,239,.98), rgba(255,248,244,1));border-top:1px solid rgba(239,215,208,.9)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:18px}
    .footer a{color:#5f362d}
    .footer small,.footer p{color:var(--muted)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 14px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;
      box-shadow:0 16px 28px rgba(215,38,30,.22);font-weight:700
    }
    .backtop{background:#fff;color:var(--primary);border:1px solid var(--line)}
    .mobile-only{display:none}
    .sr-only{position:absolute;left:-9999px}
    .fade-up{animation:fadeUp .7s ease both}
    @keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
    @media (max-width: 1024px){
      .hero-grid,.two-col,.compare,.form-wrap,.footer-grid,.grid-4,.process,.timeline,.reviews,.articles,.media-grid,.grid-3,.score-box{grid-template-columns:1fr 1fr}
      .hero-side{grid-column:1/-1}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:20px;right:20px;top:78px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow);
        flex-direction:column;align-items:flex-start;gap:8px
      }
      .nav-links.open{display:flex}
      .hero{padding-top:26px}
      .hero-panel{padding:22px}
      .hero-grid,.two-col,.compare,.form-wrap,.footer-grid,.grid-4,.process,.timeline,.reviews,.articles,.media-grid,.grid-3,.score-box{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .mobile-only{display:inline-flex}
      .desktop-only{display:none}
      h1{font-size:clamp(30px,9vw,42px)}
      .hero-metrics{grid-template-columns:1fr 1fr}
    }