:root{
      --bg:#fff7f4;
      --panel:#ffffff;
      --panel-2:#fff0ea;
      --line:#f1d7cf;
      --text:#2c2220;
      --muted:#6d5a55;
      --brand:#d61f1f;
      --brand-2:#ff6b3d;
      --brand-3:#b31212;
      --shadow:0 18px 50px rgba(167, 35, 20, .10);
      --radius:22px;
      --max: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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,107,61,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(214,31,31,.12), transparent 24%),
        linear-gradient(180deg,#fffaf8 0%,#fff6f2 46%,#fff7f4 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:30;
      backdrop-filter:saturate(160%) blur(10px);
      background:rgba(255,248,245,.88);
      border-bottom:1px solid rgba(241,215,207,.85);
    }
    header .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; box-shadow:0 8px 24px rgba(0,0,0,.06)}
    .brand strong{display:block; font-size:1.02rem; letter-spacing:.5px}
    .brand span{display:block; font-size:.85rem; color:var(--muted)}
    .nav-links{display:flex; flex-wrap:wrap; align-items:center; gap:8px; justify-content:flex-end}
    .nav-links a{
      padding:9px 12px; border-radius:999px; font-size:.92rem;
      color:#4d3f3c; border:1px solid transparent;
    }
    .nav-links a:hover,.nav-links a.active{background:#fff; border-color:var(--line); color:var(--brand-3); box-shadow:0 8px 20px rgba(214,31,31,.08)}
    .mobile-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:10px 12px; font-weight:700;
    }
    .hero{
      padding:38px 0 16px;
      position:relative;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.14fr .86fr; gap:24px; align-items:stretch;
    }
    .hero-card{
      background:linear-gradient(135deg,#fff 0%,#fff7f2 52%,#ffe7df 100%);
      border:1px solid rgba(241,215,207,.9);
      border-radius:32px;
      box-shadow:var(--shadow);
      padding:34px;
      overflow:hidden;
      position:relative;
    }
    .hero-card::before{
      content:""; position:absolute; inset:auto -40px -60px auto; width:220px; height:220px; border-radius:50%;
      background:radial-gradient(circle, rgba(255,107,61,.22), transparent 68%);
      pointer-events:none;
    }
    .eyebrow{display:inline-flex; gap:8px; align-items:center; padding:8px 14px; border-radius:999px; background:#fff2ec; color:var(--brand-3); font-weight:700; font-size:.9rem; border:1px solid rgba(214,31,31,.12)}
    h1{margin:18px 0 14px; font-size:clamp(2rem,4vw,3.7rem); line-height:1.08; letter-spacing:-.02em}
    .hero p{margin:0; color:var(--muted); font-size:1.05rem; line-height:1.8; max-width:58ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:14px 18px; border-radius:16px; font-weight:800;
      border:1px solid transparent; transition:.22s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%, var(--brand-2) 100%); color:#fff; box-shadow:0 14px 30px rgba(214,31,31,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 18px 34px rgba(214,31,31,.28)}
    .btn-ghost{background:#fff; color:var(--brand-3); border-color:var(--line)}
    .btn-ghost:hover{transform:translateY(-2px); border-color:#f0b0a1; box-shadow:0 10px 24px rgba(214,31,31,.08)}
    .hero-meta{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:22px}
    .mini-stat{
      background:rgba(255,255,255,.76); border:1px solid rgba(241,215,207,.9);
      border-radius:18px; padding:14px 16px;
    }
    .mini-stat b{display:block; font-size:1.15rem; color:#b51212}
    .mini-stat span{font-size:.88rem; color:var(--muted)}
    .hero-side{
      display:grid; gap:16px;
    }
    .side-panel{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(241,215,207,.95);
      border-radius:28px;
      padding:22px;
      box-shadow:var(--shadow);
    }
    .side-panel h2,.section h2{margin:0 0 12px; font-size:clamp(1.35rem,2vw,2rem)}
    .side-panel p,.section-intro{margin:0; color:var(--muted); line-height:1.8}
    .pill-cloud{display:flex; flex-wrap:wrap; gap:10px; margin-top:16px}
    .pill{padding:9px 12px; border-radius:999px; background:#fff6f2; border:1px solid #f2d9d0; font-size:.9rem; color:#5b4742}
    .section{padding:18px 0}
    .section-card{
      background:rgba(255,255,255,.92); border:1px solid rgba(241,215,207,.9);
      border-radius:30px; box-shadow:var(--shadow); padding:28px;
    }
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .metric,.feature,.review,.case,.article,.price-card,.network,.support-card,.compare-card,.flow-step,.faq-item,.contact-card,.about-card,.tag-card{
      background:linear-gradient(180deg,#fff 0%, #fff8f5 100%);
      border:1px solid rgba(241,215,207,.95);
      border-radius:22px;
      padding:20px;
      box-shadow:0 10px 30px rgba(130, 44, 28, .06);
      transition:.22s ease;
    }
    .metric:hover,.feature:hover,.review:hover,.case:hover,.article:hover,.price-card:hover,.network:hover,.support-card:hover,.compare-card:hover,.flow-step:hover,.contact-card:hover,.about-card:hover,.tag-card:hover{transform:translateY(-3px); box-shadow:0 16px 36px rgba(130,44,28,.09)}
    .metric b{display:block; font-size:1.55rem; color:#b31212}
    .metric span,.feature p,.review p,.case p,.article p,.support-card p,.price-card p,.network p,.compare-card p,.contact-card p,.about-card p{color:var(--muted); line-height:1.75; margin:8px 0 0}
    .feature h3,.review h3,.case h3,.article h3,.price-card h3,.network h3,.support-card h3,.compare-card h3,.flow-step h3,.contact-card h3,.about-card h3,.tag-card h3{margin:0; font-size:1.05rem}
    .eyeline{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:18px}
    .eyeline small{color:var(--muted)}
    .tag-list{display:flex; flex-wrap:wrap; gap:10px}
    .tag-list span{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#5a4743}
    .split{
      display:grid; grid-template-columns:1fr 1fr; gap:18px; align-items:start;
    }
    .table-wrap{overflow:auto; border-radius:22px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:14px 16px; border-bottom:1px solid #f4e4df; text-align:left; vertical-align:top}
    th{background:#fff2eb; color:#7e1a17}
    .rating{font-weight:800; color:#b31212}
    .faq-item summary{
      cursor:pointer; list-style:none; font-weight:700; display:flex; align-items:center; justify-content:space-between; gap:12px;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"＋"; color:var(--brand-3); font-size:1.1rem}
    .faq-item[open] summary::after{content:"－"}
    .faq-item .answer{padding-top:12px; color:var(--muted); line-height:1.8}
    .timeline{display:grid; gap:14px}
    .stepline{display:grid; grid-template-columns:auto 1fr; gap:14px; align-items:start; padding:16px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .stepno{
      width:40px; height:40px; border-radius:14px; display:grid; place-items:center; font-weight:900; color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 10px 20px rgba(214,31,31,.18);
    }
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .field{display:flex; flex-direction:column; gap:8px}
    label{font-weight:700; color:#4a3a37}
    input,select,textarea{
      width:100%; border:1px solid #ebd6ce; border-radius:14px; padding:13px 14px; background:#fff; color:var(--text);
      font:inherit; outline:none; transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#f28a73; box-shadow:0 0 0 4px rgba(242,138,115,.14)}
    textarea{min-height:128px; resize:vertical}
    .span-2{grid-column:span 2}
    .footer{
      margin-top:18px;
      padding:24px 0 26px;
      background:#fff4f0;
      border-top:1px solid #f0d8cf;
      color:#40312e;
    }
    .footer a{color:#8e1717}
    .footer .grid-3{align-items:start}
    .copyright{margin-top:16px; padding-top:16px; border-top:1px solid #edd3ca; color:#6d5a55; font-size:.92rem}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:35; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:18px; border:none; cursor:pointer; color:#fff;
      background:linear-gradient(135deg,var(--brand),var(--brand-2)); box-shadow:0 16px 28px rgba(214,31,31,.24);
      display:grid; place-items:center; font-weight:900;
    }
    .float-panel{
      display:none; width:min(320px, calc(100vw - 36px)); background:#fff; border:1px solid var(--line); border-radius:20px; padding:16px; box-shadow:var(--shadow);
    }
    .float-panel.open{display:block}
    .hero-image-grid{display:grid; grid-template-columns:1fr 1fr; gap:12px}
    .hero-preview{
      min-height:120px; border-radius:18px; background:
      linear-gradient(135deg, rgba(214,31,31,.12), rgba(255,107,61,.10)),
      linear-gradient(180deg, #fff, #fff5f1);
      border:1px dashed rgba(214,31,31,.18);
      display:grid; place-items:center; color:#7b544b; font-weight:700;
    }
    .stats-strip{display:grid; grid-template-columns:repeat(5,1fr); gap:12px}
    .note{font-size:.9rem; color:var(--muted)}
    .article-list{display:grid; gap:12px}
    .article-row{display:flex; align-items:center; justify-content:space-between; gap:14px; padding:15px 16px; border-radius:18px; background:#fff; border:1px solid var(--line)}
    .article-row b{display:block}
    .article-row span{color:var(--muted); font-size:.92rem}
    .compare-badge{display:inline-flex; align-items:center; gap:8px; padding:7px 10px; border-radius:999px; background:#fff2eb; color:#ad1212; font-weight:700}
    .network-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .trust{
      display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px;
    }
    .review .stars{color:#d61f1f; letter-spacing:2px; font-size:1rem}
    .small-links{display:flex; flex-wrap:wrap; gap:10px; margin-top:12px}
    .small-links a{padding:8px 10px; background:#fff; border:1px solid var(--line); border-radius:999px}
    .nav-mobile{
      display:none; padding:0 0 14px;
    }
    .nav-mobile .nav-links{display:grid; grid-template-columns:repeat(2,1fr)}
    .scroll-x{overflow:auto}
    .scroll-x::-webkit-scrollbar{height:10px}
    .scroll-x::-webkit-scrollbar-thumb{background:#efb4a4; border-radius:999px}
    @media (max-width: 980px){
      .hero-grid,.split,.grid-4,.grid-3,.trust,.network-grid,.stats-strip{grid-template-columns:1fr 1fr}
      .hero-meta{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .span-2{grid-column:span 1}
    }
    @media (max-width: 760px){
      .nav-links{display:none}
      .mobile-toggle{display:inline-flex}
      .nav-mobile.show{display:block}
      .hero-grid,.split,.grid-4,.grid-3,.grid-2,.trust,.network-grid,.stats-strip{grid-template-columns:1fr}
      .hero-card,.section-card{padding:20px}
      .hero{padding-top:22px}
      h1{font-size:2.05rem}
      .article-row{flex-direction:column; align-items:flex-start}
    }
    .reveal{opacity:0; transform:translateY(16px); transition:opacity .65s ease, transform .65s ease}
    .reveal.visible{opacity:1; transform:none}