:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#eef5ff;
      --text:#142033;
      --muted:#5d6b82;
      --line:#d9e3f2;
      --primary:#5b6cff;
      --primary-2:#17c3ff;
      --accent:#8a5cff;
      --success:#10b981;
      --shadow:0 18px 50px rgba(18,38,63,.10);
      --shadow-soft:0 10px 30px rgba(18,38,63,.08);
      --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 top left, rgba(91,108,255,.12), transparent 24%),
        radial-gradient(circle at 80% 10%, rgba(23,195,255,.12), transparent 22%),
        linear-gradient(180deg,#fbfcff 0%, #f4f7fd 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:1000;background:rgba(246,248,252,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(217,227,242,.85)}
    .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;border-radius:12px;object-fit:contain;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft)}
    .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:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover{background:#fff;color:var(--text);box-shadow:var(--shadow-soft)}
    .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:.25s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 14px 30px rgba(91,108,255,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(91,108,255,.28)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#b9c8e6}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);width:42px;height:42px;border-radius:12px}
    .menu-toggle span{display:block;width:18px;height:2px;background:var(--text);margin:4px auto;border-radius:2px}
    .hero{padding:52px 0 28px}
    .hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:stretch}
    .hero-card,.panel,.feature-card,.case-card,.review-card,.faq-item,.article-card,.price-card,.info-card,.compare-card,.timeline-item,.service-card,.tag-cloud,.form-card{background:var(--panel);border:1px solid rgba(217,227,242,.92);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
    .hero-card{padding:34px;position:relative;overflow:hidden}
    .hero-card::before,.hero-card::after{content:"";position:absolute;border-radius:999px;filter:blur(8px);opacity:.8}
    .hero-card::before{width:180px;height:180px;background:rgba(91,108,255,.14);top:-40px;right:-30px}
    .hero-card::after{width:220px;height:220px;background:rgba(23,195,255,.12);bottom:-90px;left:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(91,108,255,.10);color:#4453da;font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(34px,5vw,58px);line-height:1.06;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 20px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-stat{padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f7f9ff);border:1px solid var(--line)}
    .mini-stat b{display:block;font-size:20px;margin-bottom:5px}
    .mini-stat span{font-size:13px;color:var(--muted);line-height:1.5}
    .hero-side{display:grid;gap:16px}
    .hero-side .panel{padding:22px}
    .metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:26px 0}
    .metric{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f5f8ff);border:1px solid var(--line)}
    .metric b{display:block;font-size:28px;line-height:1;color:var(--text)}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:14px;line-height:1.5}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:0 0 16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:64ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .feature-card,.case-card,.review-card,.article-card,.price-card,.compare-card,.service-card,.form-card,.info-card{padding:22px}
    .feature-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3,.compare-card h3,.service-card h3,.info-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.case-card p,.review-card p,.article-card p,.price-card p,.compare-card p,.service-card p,.info-card p{margin:0;color:var(--muted);line-height:1.75}
    .chip-row,.tag-cloud-list{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:#f3f7ff;border:1px solid #dbe5f4;color:#33415c;font-size:13px}
    .timeline{display:grid;gap:12px}
    .timeline-item{padding:18px 18px 18px 20px;position:relative}
    .timeline-item::before{content:"";position:absolute;left:14px;top:22px;width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-2));box-shadow:0 0 0 5px rgba(91,108,255,.10)}
    .timeline-item h3{margin:0 0 8px 20px}
    .timeline-item p{margin:0 0 0 20px;color:var(--muted);line-height:1.7}
    .compare-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid #e7edf7;vertical-align:top}
    th{background:#f6f9ff;font-size:14px;color:#23314b}
    td{color:#324057;line-height:1.7}
    .highlight{color:#1e3a8a;font-weight:700}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;background:#fff;border:none;font-size:16px;font-weight:700;color:var(--text);text-align:left;cursor:pointer}
    .faq-q span{display:block}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 22px}
    .faq-item.active .faq-a{max-height:160px;padding-bottom:18px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8}
    .arrow{transition:.25s}
    .faq-item.active .arrow{transform:rotate(180deg)}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .stars{color:#ffb703;letter-spacing:2px;font-size:16px;margin-bottom:10px}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-meta{font-size:13px;color:var(--muted);margin-top:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid #d7e2f0;background:#fbfcff;color:var(--text);border-radius:14px;padding:13px 14px;font:inherit;outline:none;transition:.2s}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8aa4ff;box-shadow:0 0 0 4px rgba(91,108,255,.10)}
    .footer{margin-top:24px;padding:24px 0 34px;border-top:1px solid rgba(217,227,242,.95);background:rgba(246,248,252,.96)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .footer a{color:#24344f}
    .footer small{color:var(--muted)}
    .float-bar{position:fixed;right:16px;bottom:16px;z-index:999;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 14px 28px rgba(91,108,255,.24);font-weight:700}
    .float-btn.secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .reveal{opacity:0;transform:translateY(14px);transition:.7s ease}
    .reveal.show{opacity:1;transform:translateY(0)}
    .section-anchor{scroll-margin-top:92px}
    .service-tags{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .service-tag{padding:14px 16px;border-radius:16px;background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid var(--line);font-weight:600;color:#33415c;line-height:1.5}
    .compact-list{display:grid;gap:10px;margin:14px 0 0;padding:0;list-style:none}
    .compact-list li{display:flex;gap:10px;align-items:flex-start;color:var(--muted);line-height:1.7}
    .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-2));margin-top:9px;flex:none}
    .side-note{display:grid;gap:10px}
    .side-box{padding:16px;border-radius:18px;background:linear-gradient(135deg,rgba(91,108,255,.08),rgba(23,195,255,.08));border:1px solid rgba(91,108,255,.15)}
    .tag-cloud{padding:22px}
    .tag-cloud-list a{padding:8px 12px;border-radius:999px;background:#f4f7ff;border:1px solid var(--line);font-size:13px;color:#31415d}
    .img-card{padding:12px}
    .img-card img{border-radius:18px}
    .topline{height:1px;background:linear-gradient(90deg,transparent,rgba(91,108,255,.5),rgba(23,195,255,.5),transparent)}
    .mobile-only{display:none}
    @media (max-width: 1080px){
      .hero-grid,.footer-grid,.grid-3,.article-list,.reviews,.service-tags,.grid-2,.metric-grid{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 860px){
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:74px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px}
      .menu-toggle{display:inline-block}
      .hero-grid,.footer-grid,.grid-3,.article-list,.reviews,.service-tags,.grid-2,.metric-grid{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .hero{padding-top:24px}
    }