:root{
      --bg:#f5f7fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --card2:#fbfcff;
      --text:#142033;
      --muted:#5c6b85;
      --line:#dbe3f0;
      --primary:#4063ff;
      --primary2:#8a5cff;
      --accent:#00b7c8;
      --gold:#c99a3b;
      --shadow:0 18px 50px rgba(24,39,75,.08);
      --shadow2:0 10px 30px rgba(30,55,120,.12);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(138,92,255,.12), transparent 26%),
        radial-gradient(circle at top right, rgba(0,183,200,.12), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 48%, #f8fafc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:40;
      backdrop-filter:blur(18px);
      background:rgba(245,247,251,.82);
      border-bottom:1px solid rgba(219,227,240,.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:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 20px rgba(64,99,255,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.2}
    .brand-text span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .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 ease}
    .nav-links a:hover,.nav-links a:focus{color:var(--text);background:rgba(64,99,255,.08)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;padding:11px 16px;
      font-weight:600;font-size:14px;transition:.25s ease;cursor:pointer;
      white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 30px rgba(64,99,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(64,99,255,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#c8d4ea;box-shadow:var(--shadow2)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{
      padding:54px 0 28px;
      position:relative;
      overflow:hidden;
    }
    .hero::before,.hero::after{
      content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none;
      background:linear-gradient(135deg, rgba(64,99,255,.14), rgba(0,183,200,.10), rgba(201,154,59,.08));
    }
    .hero::before{width:320px;height:320px;right:-120px;top:10px;animation:float 10s ease-in-out infinite}
    .hero::after{width:220px;height:220px;left:-80px;bottom:-80px;animation:float 12s ease-in-out infinite reverse}
    @keyframes float{50%{transform:translateY(-14px) scale(1.03)}}
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch;
    }
    .hero-panel,.glass-panel,.card,.faq-item,.review-card,.case-card,.article-card,.step,.metric,.compare-card,.network-card,.pricing-card,.service-card,.form-card,.contact-card{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(251,252,255,.98));
      border:1px solid rgba(219,227,240,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-panel{padding:30px;position:relative;overflow:hidden}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;border-radius:999px;
      background:rgba(64,99,255,.08);color:#3150e6;font-size:13px;font-weight:700;
    }
    h1{margin:16px 0 14px;font-size:clamp(30px, 4vw, 54px);line-height:1.1;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:60ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .metric{padding:16px 14px;box-shadow:none;background:rgba(255,255,255,.7)}
    .metric strong{display:block;font-size:22px;line-height:1.1}
    .metric span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{display:grid;gap:14px}
    .glass-panel{padding:22px;background:linear-gradient(180deg, rgba(255,255,255,.8), rgba(238,243,255,.7))}
    .mini-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .mini-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);font-size:14px;line-height:1.6}
    .dot{width:10px;height:10px;border-radius:50%;margin-top:6px;background:linear-gradient(135deg,var(--accent),var(--primary))}
    .section{padding:26px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:66ch;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,.service-card,.step,.case-card,.review-card,.article-card,.pricing-card,.compare-card,.network-card,.contact-card,.form-card{padding:22px}
    .card h3,.service-card h3,.case-card h3,.review-card h3,.article-card h3,.pricing-card h3,.compare-card h3,.network-card h3,.contact-card h3{margin:0 0 10px;font-size:18px}
    .card p,.service-card p,.case-card p,.review-card p,.article-card p,.pricing-card p,.compare-card p,.network-card p,.contact-card p{margin:0;color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#29405f}
    .timeline{display:grid;gap:14px}
    .step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start}
    .step-num{width:40px;height:40px;border-radius:14px;background:linear-gradient(135deg, rgba(64,99,255,.12), rgba(138,92,255,.14));display:grid;place-items:center;font-weight:800;color:#3654df}
    .step h3{margin:0 0 6px;font-size:17px}
    .compare-wrap,.table-wrap{overflow:auto;border-radius:var(--radius);border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:720px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f7f9fe;font-size:14px}
    td{color:#31435f;line-height:1.7}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;background:rgba(64,99,255,.08);color:#3654df;font-size:12px;font-weight:700}
    .highlight{color:#1b2d57;font-weight:700}
    .gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .media-card{overflow:hidden}
    .media-card .media{
      aspect-ratio:16/10;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:linear-gradient(135deg,#eef3ff,#fefcff);
    }
    .media-card .media img{width:100%;height:100%;object-fit:cover}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card .meta{margin-top:14px;font-size:13px;color:var(--muted)}
    .rating{display:flex;gap:4px;color:#ffb342;font-size:16px;margin-bottom:10px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card time{display:block;color:var(--muted);font-size:13px;margin-bottom:10px}
    .contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#24344f}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#8aa1ff;box-shadow:0 0 0 4px rgba(64,99,255,.09)}
    textarea{min-height:132px;resize:vertical}
    .footer{
      margin-top:10px;
      padding:22px 0 18px;
      background:#edf2fb;
      border-top:1px solid rgba(219,227,240,.95);
      color:#21314d;
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .footer h2,.footer h3,.footer p,.footer a{color:#21314d}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .subtle{color:var(--muted)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);
      background:#fff;box-shadow:var(--shadow);display:grid;place-items:center;cursor:pointer;color:var(--text)
    }
    .floating a:hover,.floating button:hover{transform:translateY(-2px)}
    .mobile-panel{display:none}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;
      padding:18px 20px;background:transparent;border:0;color:var(--text);font:inherit;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-a{padding:0 20px 18px;color:var(--muted);line-height:1.8;display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease}
    .service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .network-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price{
      font-size:30px;font-weight:800;line-height:1.1;margin:10px 0 8px;
      background:linear-gradient(135deg,var(--primary),var(--primary2));-webkit-background-clip:text;background-clip:text;color:transparent;
    }
    .section-anchor{scroll-margin-top:90px}
    .home-link{color:#3150e6;font-weight:700}
    .topline{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
    .topline .badge{background:#fff}
    .compare-score{display:grid;gap:10px}
    .score-box{padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(64,99,255,.08), rgba(138,92,255,.10));border:1px solid rgba(64,99,255,.14)}
    .score-box strong{display:block;font-size:22px}
    .score-box span{color:var(--muted);font-size:13px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 1024px){
      .hero-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
      .grid-3,.review-grid,.articles,.gallery,.network-grid,.pricing-grid{grid-template-columns:repeat(2,1fr)}
      .service-list{grid-template-columns:1fr}
    }
    @media (max-width: 768px){
      .nav-links,.nav-actions{display:none}
      .menu-toggle{display:inline-grid;place-items:center}
      .mobile-panel{display:none;padding:0 0 14px}
      .mobile-panel.open{display:block}
      .mobile-panel .nav-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}
      .mobile-panel .nav-links a{background:#fff;border:1px solid var(--line);text-align:center}
      .hero{padding-top:26px}
      .hero-panel,.glass-panel,.card,.service-card,.step,.case-card,.review-card,.article-card,.pricing-card,.compare-card,.network-card,.contact-card,.form-card{padding:18px}
      .hero-meta{grid-template-columns:1fr}
      .grid-3,.grid-2,.review-grid,.articles,.gallery,.network-grid,.pricing-grid{grid-template-columns:1fr}
      h1{font-size:32px}
      .section-head{flex-direction:column;align-items:start}
      table{min-width:840px}
    }