:root{
      --bg:#f6f1ea;
      --panel:#ffffff;
      --panel2:#fff7ef;
      --text:#1f2937;
      --muted:#667085;
      --line:#eadfda;
      --brand:#ff4d6d;
      --brand2:#ff8a00;
      --brand3:#7c3aed;
      --shadow:0 18px 40px rgba(35,24,30,.08);
      --radius:22px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:
      radial-gradient(circle at 15% 10%, rgba(255,77,109,.12), transparent 22%),
      radial-gradient(circle at 85% 0%, rgba(124,58,237,.10), transparent 18%),
      linear-gradient(180deg,#fffaf6 0%, #f7f2ed 45%, #f3eee8 100%)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(255,250,245,.84);backdrop-filter:blur(12px);border-bottom:1px solid rgba(234,223,218,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 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;padding:4px;border:1px solid var(--line)}
    .brand strong{display:block;font-size:16px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#374151;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{background:rgba(255,77,109,.12);color:#b42345}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:#111827}
    header{padding:24px 0 10px}
    .hero{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;padding:24px 0 10px}
    .hero-copy,.hero-side,.panel,.card,.faq-item,.review,.timeline li,.article,.table-wrap,.form-box{background:rgba(255,255,255,.92);border:1px solid rgba(234,223,218,.95);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-copy{padding:30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(90deg,rgba(255,77,109,.12),rgba(255,138,0,.12));color:#a31538;font-weight:600;font-size:13px}
    h1{font-size:clamp(30px,5vw,54px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.03em}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);margin:0 0 18px}
    .cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:14px;padding:13px 18px;font-weight:700;border:1px solid transparent;transition:.2s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 24px rgba(255,77,109,.24)}
    .btn-secondary{background:#fff;border-color:var(--line);color:#111827}
    .btn:hover{transform:translateY(-1px)}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff7f2);border:1px solid var(--line)}
    .metric b{display:block;font-size:24px;color:#111827}
    .metric span{display:block;color:var(--muted);font-size:13px;margin-top:4px;line-height:1.5}
    .hero-side{padding:18px;display:grid;gap:14px}
    .side-box{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff, #fff6f0);border:1px solid var(--line)}
    .side-box h3{margin:0 0 8px;font-size:18px}
    .side-box p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .home-link{display:inline-flex;margin-top:12px;font-weight:700;color:#b42345}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:680px;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{padding:20px}
    .card h3,.panel h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p{margin:0;color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#374151}
    .panel{padding:22px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#fff8f4);border:1px solid var(--line)}
    .step .num{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:12px;background:linear-gradient(135deg,rgba(255,77,109,.16),rgba(124,58,237,.16));font-weight:800;color:#8a1334;margin-bottom:10px}
    .compare{overflow:auto}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:860px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#fff7f2;color:#111827;font-size:14px}
    td{background:#fff}
    .score{font-weight:800;color:#b42345}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;border:0;background:transparent;padding:18px 20px;font-size:16px;font-weight:700;color:#111827;text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px}
    .faq-a p{margin:0 0 18px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:220px}
    .reviews,.articles,.network,.faq-list{margin-top:4px}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review .role{font-size:13px;color:#b42345;font-weight:700;margin-bottom:8px}
    .review .name{font-weight:800;margin-bottom:10px}
    .article{padding:18px}
    .article time{font-size:13px;color:#8b95a7}
    .article h3{margin:10px 0 8px;font-size:17px}
    .article a.more{display:inline-flex;margin-top:10px;color:#b42345;font-weight:700}
    .network-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .network-item{padding:16px;border-radius:18px;background:#fff;border:1px dashed #f0d7d1}
    .form-box{padding:22px}
    form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:grid;gap:8px;font-size:14px;font-weight:700;color:#374151}
    input,select,textarea{width:100%;border-radius:14px;border:1px solid var(--line);background:#fff;padding:13px 14px;font:inherit;color:#111827;outline:none}
    textarea{min-height:124px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#ff8a00;box-shadow:0 0 0 4px rgba(255,138,0,.12)}
    .submit-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
    .mini{font-size:13px;color:var(--muted);line-height:1.7}
    footer{margin-top:12px;background:#17161b;color:#f5f7fb;padding:30px 0 22px}
    footer a{color:#ffd1db}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer-note{color:#c9cbd3;line-height:1.8;font-size:14px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.08)}
    .float-box{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--brand),var(--brand3));color:#fff;display:grid;place-items:center;box-shadow:0 16px 34px rgba(124,58,237,.28)}
    .qrcode{width:170px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
    .sticky-actions{display:flex;gap:10px;flex-wrap:wrap}
    .img-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .img-row img,.figure img{border-radius:18px;border:1px solid var(--line);background:#fff}
    .scroll-x{overflow:auto}
    .scroll-x::-webkit-scrollbar{height:8px}
    .scroll-x::-webkit-scrollbar-thumb{background:#e7c5bf;border-radius:999px}
    .reveal{opacity:0;transform:translateY(18px);transition:all .55s ease}
    .reveal.visible{opacity:1;transform:none}
    .rating{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .rating .card{background:linear-gradient(180deg,#fff,#fff7f3)}
    .rating .big{font-size:34px;font-weight:900;color:#111827}
    .hero-side .figure{display:grid;grid-template-columns:1fr;gap:12px}
    .muted-list{margin:0;padding-left:18px;color:var(--muted);line-height:1.9}
    @media (max-width: 980px){
      .hero,.grid-4,.grid-3,.steps,.review-grid,.network-grid,.footer-grid,.rating{grid-template-columns:1fr 1fr}
      .hero{grid-template-columns:1fr}
      .hero-metrics{grid-template-columns:repeat(3,1fr)}
    }
    @media (max-width: 720px){
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .menu-btn{display:inline-flex}
      .hero-metrics,.form-grid,.grid-4,.grid-3,.steps,.review-grid,.network-grid,.footer-grid,.rating,.img-row{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      h1{font-size:34px}
      .hero-copy,.panel,.card,.form-box{padding:18px}
      .topbar{position:sticky}
      table{min-width:760px}
      .float-box{right:12px;bottom:12px}
    }