:root{
      --bg:#fbfbf8;
      --panel:#ffffff;
      --panel-2:#fff6ea;
      --line:#e8e1d7;
      --text:#1f2a37;
      --muted:#5f6b7a;
      --accent:#ff4d6d;
      --accent-2:#4f46e5;
      --accent-3:#ff9f1c;
      --shadow:0 18px 45px rgba(31,42,55,.08);
      --radius:20px;
      --container: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 10% 10%, rgba(255,77,109,.08), transparent 28%),
        radial-gradient(circle at 90% 12%, rgba(79,70,229,.09), transparent 24%),
        linear-gradient(180deg,#fff 0%, #fbfbf8 38%, #f7f5ef 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(16px);
      background:rgba(255,255,255,.86);
      border-bottom:1px solid rgba(232,225,215,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:14px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:var(--muted)}
    .nav-links a:hover{color:var(--accent)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;border:1px solid transparent;
      font-weight:700;transition:.25s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--accent),#ff7b54);color:#fff;box-shadow:0 12px 28px rgba(255,77,109,.25)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(255,77,109,.32)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#d7c6b6;transform:translateY(-1px)}
    .menu-btn{display:none}
    .hero{
      padding:34px 0 24px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-copy,.hero-side,.section-card,.info-card,.review-card,.faq-item,.article-card,.stat-card,.service-card,.timeline-card,.compare-card,.tag-cloud,.form-card,.price-card,.network-card{
      background:var(--panel);
      border:1px solid rgba(232,225,215,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px; position:relative; overflow:hidden}
    .hero-copy:before{
      content:"";position:absolute;inset:auto -80px -90px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(255,77,109,.14), transparent 68%);
    }
    .badge{display:inline-flex;align-items:center;gap:8px;background:#fff1f4;color:#d12a4b;border:1px solid #ffd5de;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,5vw,54px);line-height:1.05;margin:18px 0 14px}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini{
      padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#fffaf4);
      border:1px solid #efe3d3;
    }
    .mini strong{display:block;font-size:18px}
    .mini span{display:block;font-size:13px;color:var(--muted);margin-top:5px;line-height:1.5}
    .hero-side{padding:22px;background:linear-gradient(180deg,#0f172a,#1f2a37);color:#fff;position:relative;overflow:hidden}
    .hero-side:before,.hero-side:after{
      content:"";position:absolute;border-radius:50%;filter:blur(10px);opacity:.35
    }
    .hero-side:before{width:160px;height:160px;background:#ff4d6d;top:-30px;right:-20px}
    .hero-side:after{width:120px;height:120px;background:#4f46e5;bottom:10px;left:-30px}
    .hero-side h2{margin:0 0 12px;font-size:22px}
    .hero-side p,.hero-side li{color:rgba(255,255,255,.8);line-height:1.7}
    .side-list{margin:16px 0 0;padding:0;list-style:none;display:grid;gap:12px}
    .side-list li{padding:12px 14px;border-radius:14px;background:rgba(255,255,255,.08)}
    section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:12px;align-items:end;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .stat-card,.service-card,.review-card,.article-card,.timeline-card,.compare-card,.network-card,.price-card{padding:20px}
    .stat-card strong{font-size:30px;display:block}
    .stat-card span{color:var(--muted);font-size:14px}
    .service-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .service-card h3,.review-card h3,.article-card h3,.timeline-card h3,.price-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.review-card p,.article-card p,.timeline-card p,.network-card p,.price-card p{margin:0;color:var(--muted);line-height:1.75}
    .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .chip{font-size:12px;padding:7px 10px;border-radius:999px;background:#f6f3ee;border:1px solid #ebdfd3;color:#5b6572}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .table-wrap{overflow: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 #eee;text-align:left;font-size:14px;vertical-align:top}
    th{background:#fff8f1;color:#2f3a4a}
    tr:hover td{background:#fcfcfe}
    details{
      border-top:1px solid var(--line);
      padding:14px 0;
    }
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    details p{margin:10px 0 0;color:var(--muted);line-height:1.75}
    .faq-card{padding:22px}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .rating{color:#e49b00;font-weight:800;margin-bottom:10px}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .article-card .meta{margin-top:12px;font-size:13px;color:var(--muted)}
    .tag-cloud,.form-card,.compare-card,.price-card{padding:22px}
    .tag-row{display:flex;flex-wrap:wrap;gap:10px}
    .tag-row .chip{background:linear-gradient(180deg,#fff,#fff4e8)}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:86px 1fr;gap:14px;align-items:start;padding:14px 0;border-top:1px solid var(--line)}
    .timeline-item:first-child{border-top:0;padding-top:0}
    .timeline-item b{display:inline-block;padding:6px 10px;border-radius:999px;background:#eef2ff;color:#3540a8;font-size:12px}
    .network-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
    .qrbox{
      display:flex;gap:14px;align-items:center;flex-wrap:wrap;
      background:linear-gradient(180deg,#fff, #fff8f1);
      border:1px solid var(--line);border-radius:18px;padding:16px;margin-top:14px
    }
    .qrbox img{width:120px;height:120px;object-fit:cover;border-radius:14px;border:1px solid #eadfce;background:#fff}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid #d9d0c6;background:#fff;border-radius:14px;
      padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s;
    }
    input:focus,select:focus,textarea:focus{border-color:#ff8aa0;box-shadow:0 0 0 4px rgba(255,77,109,.12)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
    .footer{
      margin-top:20px;padding:26px 0 20px;background:#111827;color:#fff
    }
    .footer a{color:#ffd7a3}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:start}
    .footer small,.footer p{color:rgba(255,255,255,.78);line-height:1.7}
    .footer .chip{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.12);color:#fff}
    .float-bar{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--accent-2),#7c3aed);color:#fff;box-shadow:0 16px 30px rgba(79,70,229,.28)
    }
    .float-btn.secondary{background:linear-gradient(135deg,var(--accent),#ff875e)}
    .backtop{position:fixed;right:16px;bottom:130px;z-index:60;opacity:0;pointer-events:none;transition:.25s}
    .backtop.show{opacity:1;pointer-events:auto}
    .fade-up{opacity:0;transform:translateY(18px);transition:.55s ease}
    .fade-up.show{opacity:1;transform:none}
    .mobile-toggle{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.service-grid,.split,.reviews,.article-list,.network-grid,.footer-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn,.mobile-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;flex-direction:column;align-items:flex-start;width:100%;
        padding:14px 0 0;gap:10px
      }
      .nav{flex-wrap:wrap}
      .nav-cta{margin-left:auto}
      .timeline-item{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .hero-copy,.hero-side,.section-card,.info-card,.review-card,.faq-card,.article-card,.stat-card,.service-card,.timeline-card,.compare-card,.tag-cloud,.form-card,.price-card,.network-card{border-radius:18px}
      h1{font-size:30px}
      .section-head{flex-direction:column;align-items:flex-start}
      .form-grid{grid-template-columns:1fr}
      .nav-cta .btn-ghost{display:none}
    }