:root{
      --bg:#fbf8ff;
      --bg2:#f4edff;
      --card:#ffffff;
      --text:#1f2430;
      --muted:#667085;
      --primary:#7a2fff;
      --primary2:#c04dff;
      --line:#e7ddfb;
      --shadow:0 18px 50px rgba(91, 41, 168, .10);
      --shadow2:0 10px 26px rgba(91, 41, 168, .12);
      --radius:20px;
      --radius2:28px;
      --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(1200px 500px at 10% -10%, rgba(192,77,255,.16), transparent 45%),
        radial-gradient(900px 420px at 95% 8%, rgba(122,47,255,.12), transparent 40%),
        linear-gradient(180deg,var(--bg),#fff 28%, #fff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(231,221,251,.8)}
    .topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;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;padding:4px;box-shadow:0 10px 22px rgba(122,47,255,.12)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;line-height:1.1}
    .brand-text span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:var(--text)}
    .nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:#2a3142;padding:8px 0;position:relative}
    .nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;border-radius:10px;background:linear-gradient(90deg,var(--primary),var(--primary2));transition:.25s ease}
    .nav a:hover::after,.nav a:focus::after{width:100%}
    .nav .nav-cta,.btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;border:1px solid transparent;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;
      box-shadow:0 12px 26px rgba(122,47,255,.22);transition:.25s ease
    }
    .nav .nav-cta:hover,.btn:hover{transform:translateY(-1px);box-shadow:0 16px 34px rgba(122,47,255,.28)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line);box-shadow:none}
    .hero{padding:42px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.metric,.compare,.timeline-item,.tagbox,.formbox,.tablebox,.contactbox,.promo{
      background:var(--card);border:1px solid rgba(231,221,251,.9);border-radius:var(--radius2);box-shadow:var(--shadow)
    }
    .hero-main{padding:34px 30px;position:relative;overflow:hidden}
    .hero-main::before,.hero-side::before{content:"";position:absolute;inset:auto -60px -80px auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle, rgba(192,77,255,.24), transparent 60%)}
    .kicker{display:inline-flex;align-items:center;gap:8px;color:var(--primary);background:#f4ebff;border:1px solid #ead8ff;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .mini{padding:14px;border-radius:18px;background:linear-gradient(180deg,#fff,#faf7ff);border:1px solid var(--line)}
    .mini strong{display:block;font-size:15px}
    .mini span{display:block;color:var(--muted);font-size:13px;line-height:1.6;margin-top:6px}
    .hero-side{padding:22px;display:grid;gap:14px;align-content:start}
    .side-stat{padding:18px;border-radius:18px;background:linear-gradient(135deg,#f9f4ff,#fff);border:1px solid var(--line)}
    .side-stat b{font-size:28px;color:var(--primary)}
    .side-stat p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.6}
    .section{padding:18px 0 6px}
    .section h2{margin:0 0 16px;font-size:26px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head p{margin:0;color:var(--muted);max-width:720px;line-height:1.7}
    .metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .metric{padding:20px}
    .metric b{display:block;font-size:24px;color:var(--primary)}
    .metric span{display:block;margin-top:8px;color:var(--muted);line-height:1.6;font-size:13px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .card,.review,.article,.faq-item,.timeline-item,.compare,.tagbox,.formbox,.tablebox,.contactbox,.promo{padding:20px}
    .card h3,.review h3,.article h3,.promo h3{margin:0 0 10px;font-size:18px}
    .card p,.review p,.article p,.promo p{margin:0;color:var(--muted);line-height:1.75}
    .bullets{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .bullets li{display:flex;gap:10px;color:#30384d;line-height:1.6}
    .bullets i{display:inline-block;width:9px;height:9px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--primary),var(--primary2));flex:none}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#faf6ff;border:1px solid var(--line);font-size:13px;color:#3b4160}
    .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{position:relative;padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;font-weight:700;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:17px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .compare-wrap,.table-wrap{overflow-x:auto}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:820px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#faf7ff;color:#2c3550;font-size:14px}
    tr:last-child td{border-bottom:none}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#f4ebff;color:var(--primary);font-size:12px;font-weight:700}
    .rating{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:stretch}
    .stars{font-size:26px;letter-spacing:4px;color:#ffb300}
    .faq{display:grid;gap:12px}
    .faq-item summary{list-style:none;cursor:pointer;font-weight:700}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{margin:12px 0 0;color:var(--muted);line-height:1.75}
    .reviews,.articles,.timeline,.contact-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review .meta{margin-top:14px;color:#39415a;font-size:13px}
    .article .meta{margin-top:12px;color:var(--muted);font-size:13px}
    .form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700;color:#31405c}
    input,select,textarea{
      width:100%;padding:13px 14px;border:1px solid #dcd3f5;border-radius:14px;
      background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(122,47,255,.55);box-shadow:0 0 0 4px rgba(122,47,255,.10)}
    textarea{min-height:128px;resize:vertical}
    .footer{margin-top:20px;padding:26px 0 24px;background:#f6f0ff;border-top:1px solid rgba(231,221,251,.9)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .footer, .footer a, .footer p, .footer li{color:#2b3347}
    .footer a{color:#5b2aa8}
    .footer small{color:#5a6072}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:52px;height:52px;border-radius:16px;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(122,47,255,.25);cursor:pointer
    }
    .float-panel{position:fixed;right:16px;bottom:80px;z-index:60;display:none;width:min(320px,calc(100vw - 32px));background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow2);padding:16px}
    .float-panel.show{display:block}
    .float-panel img{width:100%;border-radius:16px}
    .float-panel p{margin:10px 0 0;color:var(--muted);line-height:1.7;font-size:13px}
    .scroll-top{position:fixed;right:16px;bottom:136px;opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s ease}
    .scroll-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .article-list{display:grid;gap:10px}
    .article-list a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:14px;background:#faf7ff;border:1px solid var(--line)}
    .article-list a span{color:var(--primary);font-size:13px}
    .table-note{color:var(--muted);font-size:13px;margin-top:10px;line-height:1.7}
    .floating-contact{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .service-network{display:flex;flex-wrap:wrap;gap:10px}
    .service-network a{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#30415d}
    .case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .case{padding:20px;border-radius:20px;border:1px solid var(--line);background:linear-gradient(180deg,#fff,#fbf8ff)}
    .case h3{margin:0 0 10px;font-size:18px}
    .case .badge{margin-bottom:12px}
    .case p{margin:0;color:var(--muted);line-height:1.75}
    .case ul{margin:14px 0 0;padding-left:18px;color:#39415a;line-height:1.7}
    .timeline-item h3{margin:0 0 8px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .timeline-item .badge{margin-bottom:10px}
    .about-wrap{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .highlight{
      padding:18px;border-radius:18px;background:linear-gradient(135deg,#faf6ff,#fff);border:1px solid var(--line)
    }
    .highlight strong{display:block;font-size:18px;margin-bottom:8px}
    .highlight p{margin:0;color:var(--muted);line-height:1.7}
    .price-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .price h3{margin:0 0 8px}
    .price b{font-size:26px;color:var(--primary)}
    .price p{margin:10px 0 0;color:var(--muted);line-height:1.75}
    .tagbox{display:grid;gap:14px}
    .btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
    .muted{color:var(--muted)}
    @media (max-width: 980px){
      .hero-grid,.metrics,.grid-3,.steps,.reviews,.articles,.timeline,.contact-grid,.case-grid,.about-wrap,.price-list,.footer-grid,.rating{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav{display:none;width:100%;padding:12px 0 4px;justify-content:flex-start}
      .nav.open{display:flex}
      .topbar{flex-wrap:wrap}
      .hero{padding-top:22px}
    }
    @media (max-width: 640px){
      .container{padding:0 16px}
      .hero-main{padding:24px 18px}
      .hero-side,.card,.review,.article,.faq-item,.timeline-item,.compare,.tagbox,.formbox,.tablebox,.contactbox,.promo,.case,.price{padding:16px}
      .hero-list,.form{grid-template-columns:1fr}
      h1{font-size:32px}
      .section h2{font-size:22px}
      .nav{gap:12px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:all .55s ease}
    .reveal.show{opacity:1;transform:none}