:root{
      --bg:#f6f8fc;
      --surface:#ffffff;
      --surface-2:#f3f6ff;
      --text:#172033;
      --muted:#5d677f;
      --line:#dce3f1;
      --brand:#0f62ff;
      --brand-2:#ff4d6d;
      --brand-3:#00c2a8;
      --brand-4:#6a5cff;
      --shadow:0 18px 50px rgba(18,32,70,.10);
      --radius:22px;
      --radius-sm:16px;
      --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 15% 10%, rgba(106,92,255,.16), transparent 24%),
        radial-gradient(circle at 85% 0%, rgba(255,77,109,.14), transparent 22%),
        linear-gradient(180deg,#ffffff 0%,#f6f8fc 42%,#f7f9ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar,.site-header,.site-footer,.section{position:relative}
    .site-header{padding:14px 0 8px}
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:14px 18px;background:rgba(255,255,255,.78);backdrop-filter:blur(14px);
      border:1px solid rgba(220,227,241,.88);border-radius:24px;box-shadow:var(--shadow)
    }
    .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;border:1px solid var(--line);padding:4px}
    .brand strong{display:block;font-size:18px;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:var(--muted);padding:8px 10px;border-radius:999px;transition:.22s}
    .nav-links a:hover,.nav-links a:focus{color:var(--text);background:#eef3ff}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
      white-space:nowrap
    }
    .btn:hover{transform:translateY(-1px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#2f89ff);color:#fff;box-shadow:0 14px 28px rgba(15,98,255,.25)}
    .btn-secondary{background:#eef3ff;color:#17315f;border:1px solid #dce6ff}
    .menu-toggle{display:none;background:#eef3ff;border:1px solid #dce6ff;color:#17315f}
    .hero{padding:28px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px;align-items:stretch}
    .hero-main,.hero-side,.card,.panel,.faq-item,.review,.timeline li,.price-box,.form-wrap,.table-wrap,.news-box{
      background:rgba(255,255,255,.82);border:1px solid rgba(220,227,241,.92);box-shadow:var(--shadow)
    }
    .hero-main{border-radius:30px;padding:34px;overflow:hidden}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef7ff;color:#1652d5;font-size:13px;font-weight:700}
    h1{margin:18px 0 14px;font-size:clamp(32px,4.6vw,56px);line-height:1.05;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f5f8ff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:22px}
    .stat span{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}
    .hero-side{border-radius:30px;padding:24px;display:flex;flex-direction:column;gap:16px;background:
      linear-gradient(180deg,rgba(255,255,255,.92),rgba(248,250,255,.92)),
      linear-gradient(135deg,rgba(15,98,255,.08),rgba(255,77,109,.08))}
    .mini-card{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .mini-card h3{margin:0 0 10px;font-size:16px}
    .mini-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.75}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .card,.panel,.faq-item,.review,.price-box,.form-wrap,.news-box{border-radius:24px;padding:20px}
    .card h3,.panel h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.review p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#eef3ff;color:#21417b;border:1px solid #dbe5ff;font-size:13px}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:22px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid var(--line)}
    .step b{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-4));color:#fff;margin-bottom:12px}
    .table-wrap{border-radius:24px;overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5f8ff;font-size:14px}
    td{font-size:14px;color:#2a3550;line-height:1.7}
    .score-box{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
    .rating{
      padding:24px;border-radius:24px;background:linear-gradient(135deg,rgba(15,98,255,.08),rgba(255,77,109,.08));
      border:1px solid #dfe8ff
    }
    .rating strong{font-size:42px;line-height:1;color:#12326d}
    .rating span{display:block;margin-top:10px;color:var(--muted)}
    details{border-radius:18px;border:1px solid var(--line);background:#fff}
    summary{list-style:none;cursor:pointer;padding:18px 18px;font-weight:700}
    summary::-webkit-details-marker{display:none}
    details p{padding:0 18px 18px;margin:0;color:var(--muted);line-height:1.8}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .review-head{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .review-head strong{font-size:16px}
    .role{font-size:13px;color:#1f4fb7;background:#edf4ff;border:1px solid #dbe6ff;padding:6px 10px;border-radius:999px}
    .timeline{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline li{border-radius:22px;padding:18px;position:relative}
    .timeline li:before{content:"";width:10px;height:10px;border-radius:999px;background:linear-gradient(135deg,var(--brand-2),var(--brand));display:block;margin-bottom:12px}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .price-box h3{margin:0 0 10px}
    .price-box .money{font-size:28px;font-weight:800;color:#12326d}
    .form-wrap form{display:grid;grid-template-columns:repeat(2,1fr);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 #d8e2f2;border-radius:14px;padding:12px 14px;background:#fff;color:var(--text);
      font:inherit;outline:none;transition:border .2s, box-shadow .2s
    }
    input:focus,select:focus,textarea:focus{border-color:#7aa2ff;box-shadow:0 0 0 4px rgba(15,98,255,.12)}
    textarea{min-height:130px;resize:vertical}
    .footer-wrap{padding:26px 0 34px}
    .site-footer{
      border-radius:28px;background:#0f1730;color:#e9efff;padding:26px 22px;border:1px solid rgba(255,255,255,.08)
    }
    .site-footer a{color:#cfe0ff}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer-grid p,.footer-grid li{color:#c6d0ea;line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.08)}
    .float-tools{position:fixed;right:18px;bottom:18px;z-index:50;display:flex;flex-direction:column;gap:10px}
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:0;display:grid;place-items:center;box-shadow:var(--shadow);cursor:pointer
    }
    .float-tools .kefu{background:linear-gradient(135deg,var(--brand-2),#ff8f70);color:#fff}
    .float-tools .top{background:#fff;color:#17315f;border:1px solid var(--line)}
    .scroll-reveal{opacity:0;transform:translateY(16px);transition:opacity .65s ease, transform .65s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    .mobile-only{display:none}
    .center-note{font-size:13px;color:var(--muted)}
    .article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .article-list a{display:block;padding:18px;border-radius:20px;background:#fff;border:1px solid var(--line);transition:.2s}
    .article-list a:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(18,32,70,.10)}
    .badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .badge{padding:8px 10px;border-radius:12px;background:#fff;border:1px solid var(--line);color:#21417b;font-size:13px}
    .dual-banner{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .dual-banner img{width:100%;border-radius:20px;border:1px solid var(--line);background:#fff}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.process,.timeline,.price-grid,.article-list,.score-box,.footer-grid,.dual-banner{grid-template-columns:1fr}
      .form-wrap form{grid-template-columns:1fr}
      .faq-grid{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav{align-items:center}
      .mobile-only{display:inline-flex}
    }
    .mobile-panel{display:none;padding:10px 0 0}
    .mobile-panel.open{display:block}
    .mobile-panel a{display:block;padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line);margin-top:10px;color:var(--muted)}
    .mobile-panel .btn{width:100%;margin-top:10px}