:root{
      --bg:#f7f4ef;
      --bg2:#fffaf4;
      --card:#ffffff;
      --line:#e9e1d7;
      --text:#1f2a37;
      --muted:#5f6b7a;
      --brand:#246bff;
      --brand2:#7c4dff;
      --accent:#ff8a3d;
      --good:#18a058;
      --shadow:0 14px 40px rgba(39,56,84,.08);
      --shadow2:0 10px 26px rgba(46,67,101,.12);
      --radius:18px;
      --radius2:24px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(36,107,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(255,138,61,.10), transparent 24%),
        linear-gradient(180deg, #fffdf9 0%, var(--bg) 46%, #f8f7fb 100%);
    }
    a{color:var(--brand);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container)); margin:0 auto}
    header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(160%) blur(14px);
      background:rgba(255,250,244,.84);
      border-bottom:1px solid rgba(233,225,215,.75);
    }
    .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:42px;height:42px;border-radius:12px;object-fit:contain;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 8px 22px rgba(16,24,40,.06)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);opacity:.86}
    .nav-links a:hover,.nav-links a:focus{color:var(--brand)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:999px;padding:12px 18px;font-weight:700;
      cursor:pointer;transition:.22s ease;box-shadow:none;white-space:nowrap;
    }
    .btn-primary{color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 12px 28px rgba(36,107,255,.24)}
    .btn-secondary{color:var(--text);background:#fff;border:1px solid var(--line)}
    .btn:hover{transform:translateY(-1px);box-shadow:var(--shadow2)}
    .mobile-toggle{display:none}
    .hero{
      padding:28px 0 24px;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.timeline-item,.price-box,.compare,.form-box,.network-box,.case{
      background:rgba(255,255,255,.82);
      border:1px solid rgba(233,225,215,.9);
      border-radius:var(--radius2);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(36,107,255,.08);color:var(--brand);font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,5vw,56px);line-height:1.06;margin:16px 0 14px}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:62ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0 22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
    .mini{
      padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#fbfaf7);
      border:1px solid var(--line);
    }
    .mini b{display:block;font-size:18px;margin-bottom:6px}
    .mini span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .hero-side .topline{display:flex;justify-content:space-between;align-items:center;gap:10px}
    .tag{padding:7px 10px;border-radius:999px;background:linear-gradient(135deg,rgba(255,138,61,.13),rgba(124,77,255,.10));color:#7a3f12;font-size:12px;font-weight:700}
    .hero-card{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #fbf8ff);
      border:1px solid #ebe2f9;
    }
    .hero-card h3{margin:0 0 8px;font-size:16px}
    .hero-card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .metrics{
      padding:10px 0 4px;
      display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
    }
    .metric{padding:20px 18px}
    .metric .num{font-size:30px;font-weight:800;letter-spacing:-.02em}
    .metric .cap{margin-top:6px;color:var(--muted);font-size:13px;line-height:1.6}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;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:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card,.panel,.case,.review,.article,.compare,.form-box,.network-box,.price-box,.faq-item,.timeline-item{padding:20px}
    .card h3,.panel h3,.case h3,.review h3,.article h3,.network-box h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.case p,.review p,.article p,.network-box p{margin:0;color:var(--muted);line-height:1.75}
    .badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
    .badge{font-size:12px;padding:7px 10px;border-radius:999px;background:#f5f7ff;color:#3452a1;border:1px solid #dfe6ff}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:20px;border-radius:18px;border:1px solid var(--line);background:linear-gradient(180deg,#fff,#fcfbf8);position:relative}
    .step .idx{width:34px;height:34px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800;margin-bottom:12px}
    table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    th{background:#faf8f3;font-size:14px}
    tr:last-child td{border-bottom:none}
    .ok{color:var(--good);font-weight:700}
    .no{color:#b45309;font-weight:700}
    .compare-top{display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:14px}
    .score{display:flex;align-items:baseline;gap:10px}
    .score strong{font-size:42px;line-height:1;color:var(--brand)}
    .score span{color:var(--muted)}
    .faq-list{display:grid;gap:12px}
    details.faq-item{padding:0;overflow:hidden}
    details summary{cursor:pointer;list-style:none;padding:18px 20px;font-weight:700}
    details summary::-webkit-details-marker{display:none}
    details .faq-body{padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .reviews,.articles,.cases,.timeline,.prices{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review .role{margin-top:12px;color:var(--brand);font-size:13px;font-weight:700}
    .article .meta{margin-top:12px;color:#7a8796;font-size:13px}
    .timeline-item .date{color:var(--brand);font-weight:800;margin-bottom:10px}
    .tag-cloud{display:flex;gap:10px;flex-wrap:wrap}
    .tag-cloud a,.tag-cloud span{padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--text);font-size:13px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:block;font-size:13px;font-weight:700;margin-bottom:8px;color:var(--text)}
    input,select,textarea{
      width:100%;border:1px solid #d9dee7;border-radius:14px;background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:.2s ease;
    }
    textarea{min-height:126px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(36,107,255,.6);box-shadow:0 0 0 4px rgba(36,107,255,.08)}
    .span-2{grid-column:span 2}
    .footer{
      margin-top:18px;padding:20px 0 28px;border-top:1px solid rgba(233,225,215,.95);
      background:linear-gradient(180deg,rgba(255,250,244,.4),rgba(247,244,239,.95));
      color:var(--text);
    }
    .footer a{color:#244fcf}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
    .copyright{margin-top:16px;color:var(--muted);font-size:13px;line-height:1.7}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px;
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;
      box-shadow:var(--shadow);cursor:pointer;color:var(--text);
    }
    .float-contact{
      position:fixed;left:18px;bottom:18px;z-index:60;
      width:min(320px,calc(100vw - 36px));
    }
    .contact-card{
      background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow2);
      display:flex;gap:12px;align-items:center
    }
    .contact-card img{width:84px;height:84px;object-fit:cover;border-radius:14px;border:1px solid var(--line);background:#fff}
    .contact-card strong{display:block;margin-bottom:6px}
    .contact-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}
    .menu-open .nav-links{display:flex}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.cases,.timeline,.prices,.workflow,.metrics,.footer-grid{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:72px;padding:14px;background:rgba(255,255,255,.98);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow2)}
      .nav{position:relative}
      .mobile-toggle{display:inline-flex}
      .nav-cta{margin-left:auto}
      .span-2{grid-column:span 1}
      .form-grid{grid-template-columns:1fr}
    }