:root{
      --bg:#f7f7fb;
      --panel:#ffffff;
      --panel-2:#fff7ef;
      --text:#172033;
      --muted:#5c677d;
      --line:#e8e2d9;
      --primary:#ff6a3d;
      --primary-2:#4b7cff;
      --accent:#15b8a6;
      --shadow:0 18px 40px rgba(27,36,61,.08);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at top left, rgba(255,106,61,.10), transparent 28%),
      radial-gradient(circle at top right, rgba(75,124,255,.10), transparent 24%),
      linear-gradient(180deg,#fff 0%,#f7f7fb 20%,#f6f8fc 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(232,226,217,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:800}
    .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{font-size:1.02rem}
    .brand span{display:block;font-size:.78rem;color:var(--muted);font-weight:600}
    .nav-links{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:flex-end}
    .nav-links a{padding:9px 12px;border-radius:999px;color:var(--text);font-size:.92rem}
    .nav-links a:hover,.nav-links a:focus-visible{background:#fff;box-shadow:0 8px 20px rgba(27,36,61,.08)}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:999px;padding:12px 16px;font-weight:700;cursor:pointer;transition:.22s ease;white-space:nowrap}
    .btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),#ff8a4c);color:#fff}
    .btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{position:relative;padding:42px 0 28px}
    .hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:24px;align-items:stretch}
    .hero-card,.panel{background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(255,255,255,.92));border:1px solid rgba(232,226,217,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:34px;position:relative;overflow:hidden}
    .hero-card::before,.hero-card::after{content:"";position:absolute;border-radius:999px;filter:blur(2px);opacity:.7;pointer-events:none}
    .hero-card::before{width:180px;height:180px;background:rgba(255,106,61,.13);right:-40px;top:-36px}
    .hero-card::after{width:140px;height:140px;background:rgba(75,124,255,.12);left:42%;bottom:-62px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#fff2ea;color:#b23a12;font-weight:700;font-size:.88rem;border:1px solid #ffd2bf}
    h1{margin:16px 0 12px;font-size:clamp(2rem,5vw,3.9rem);line-height:1.06;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:1.03rem;line-height:1.9;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .metric{background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:18px;padding:16px}
    .metric b{display:block;font-size:1.3rem;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:.9rem;line-height:1.5}
    .hero-side{display:grid;gap:16px}
    .hero-side .panel{padding:22px}
    .side-badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#eff6ff;color:#1d4ed8;font-weight:700;font-size:.85rem}
    .platform-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .chip{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.88rem;color:var(--text)}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:12px 0 16px}
    .section-head h2{margin:0;font-size:clamp(1.35rem,2.7vw,2rem)}
    .section-head p{margin:0;color:var(--muted);max-width:60ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 10px 22px rgba(27,36,61,.05);transition:.22s ease}
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#fff1eb,#fff);border:1px solid #ffd5c3;margin-bottom:14px;color:var(--primary);font-weight:800}
    .card h3{margin:0 0 10px;font-size:1.04rem}
    .card p,.card li{color:var(--muted);line-height:1.8}
    .card ul{margin:0;padding-left:18px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .step-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .step{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#fff8f1);border:1px solid #f1ddd0}
    .step b{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:var(--primary);color:#fff;margin-bottom:10px}
    .table-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:780px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid #eef0f3;vertical-align:top}
    th{background:#fff8f3;color:#8a3418;font-size:.95rem}
    td{color:var(--text);font-size:.95rem;line-height:1.7}
    .rating{display:flex;align-items:center;gap:8px;font-weight:800;color:#e05a2c}
    .faq{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:0 8px 20px rgba(27,36,61,.04)}
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    details p{margin:12px 0 0;color:var(--muted);line-height:1.8}
    .reviews,.articles,.gallery,.network,.links{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{font-size:1rem;line-height:1.8;color:var(--text)}
    .author{display:flex;align-items:center;justify-content:space-between;margin-top:16px;color:var(--muted);font-size:.92rem}
    .gallery img,.qr img{width:100%;border-radius:18px;border:1px solid var(--line);background:#fff}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text)}
    .articles a{display:block;padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 22px rgba(27,36,61,.04)}
    .articles h3{margin:0 0 8px}
    .articles p{margin:0;color:var(--muted);line-height:1.75}
    .form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    .field label{font-weight:700}
    .field input,.field select,.field textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #d9e0ea;background:#fff;color:var(--text);font:inherit;outline:none}
    .field textarea{min-height:132px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(75,124,255,.65);box-shadow:0 0 0 4px rgba(75,124,255,.12)}
    .footer{margin-top:18px;padding:26px 0 34px;border-top:1px solid var(--line);background:#fff}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer p,.footer a,.footer li{color:var(--muted);line-height:1.8}
    .footer a{color:#264bff}
    .floating{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:60}
    .float-btn{width:52px;height:52px;border-radius:18px;background:#fff;border:1px solid var(--line);display:grid;place-items:center;box-shadow:var(--shadow)}
    .float-btn.primary{background:linear-gradient(135deg,var(--primary),#ff8a4c);color:#fff;border-color:transparent}
    .mobile-nav{display:none}
    .fade-up{opacity:0;transform:translateY(18px);transition:.65s ease}
    .fade-up.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.split,.footer-grid,.grid-4,.grid-3,.reviews,.articles,.gallery,.network,.links{grid-template-columns:1fr 1fr}
      .step-list{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 720px){
      .nav-links,.nav-cta{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-nav{display:none;padding:0 0 16px}
      .mobile-nav.open{display:block}
      .mobile-nav a{display:block;padding:12px 0;border-top:1px solid #eef0f3;color:var(--text)}
      .hero{padding-top:22px}
      .hero-card,.panel,.card{padding:18px}
      .hero-grid,.split,.footer-grid,.grid-4,.grid-3,.reviews,.articles,.gallery,.network,.links{grid-template-columns:1fr}
      .hero-metrics,.step-list{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      .floating{right:12px;bottom:12px}
    }