:root{
      --bg:#f6f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#102033;
      --muted:#5d6b7d;
      --line:#dce5f2;
      --primary:#4f46e5;
      --primary2:#06b6d4;
      --accent:#ff7a59;
      --shadow:0 18px 50px rgba(15, 23, 42, .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 20% 10%, rgba(79,70,229,.12), transparent 25%),
        radial-gradient(circle at 80% 15%, rgba(6,182,212,.12), transparent 20%),
        linear-gradient(180deg, #fbfcff 0%, #f4f7fd 48%, #eef3fb 100%);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(255,255,255,.78);
      border-bottom:1px solid rgba(220,229,242,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 24px rgba(15,23,42,.08)}
    .brand-text{display:flex;flex-direction:column;line-height:1.1}
    .brand-text strong{font-size:18px}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#334155;padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover{background:#eef2ff;color:#1e1b4b}
    .nav-cta{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:12px 18px;font-weight:700;font-size:14px;cursor:pointer;
      transition:.25s;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(79,70,229,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(79,70,229,.28)}
    .btn-ghost{background:#fff;color:#1e293b;border-color:#d7def0}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#a5b4fc}
    .menu-btn{display:none;background:#fff;border:1px solid #d7def0;border-radius:14px;width:46px;height:46px;align-items:center;justify-content:center}
    .menu-btn span{display:block;width:18px;height:2px;background:#334155;position:relative}
    .menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:#334155}
    .menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}
    .hero{
      padding:48px 0 28px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.quote,.faq-item,.article-item,.timeline-item,.price-box,.compare-box,.service-net{
      background:rgba(255,255,255,.84);
      border:1px solid rgba(220,229,242,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none
    }
    .hero-main::before{width:220px;height:220px;background:radial-gradient(circle, rgba(79,70,229,.18), transparent 65%);right:-40px;top:-30px}
    .hero-main::after{width:160px;height:160px;background:radial-gradient(circle, rgba(6,182,212,.18), transparent 65%);left:-30px;bottom:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef2ff;color:#4338ca;font-size:13px;font-weight:700}
    h1{font-size:clamp(32px,5vw,54px);line-height:1.05;margin:18px 0 14px;letter-spacing:-.03em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .feature-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .chip{padding:9px 12px;border-radius:999px;background:#f1f5ff;color:#334155;font-size:13px;border:1px solid #d8e2fb}
    .hero-stats{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:24px;
    }
    .stat{padding:18px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f6f9ff);border:1px solid #e0e9f7}
    .stat strong{display:block;font-size:24px;color:#0f172a}
    .stat span{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}
    .hero-side{padding:20px;display:grid;gap:16px}
    .side-top{display:grid;gap:12px}
    .side-panel{
      padding:18px;border-radius:18px;background:linear-gradient(135deg,rgba(79,70,229,.08),rgba(6,182,212,.09));border:1px solid #dbe5f7
    }
    .side-panel h3{margin:0 0 8px;font-size:18px}
    .side-panel p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .mini-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .mini-list li{display:flex;gap:10px;color:#334155;font-size:14px;line-height:1.6}
    .mini-list li::before{content:"";flex:0 0 8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2));margin-top:.55em}
    .section{padding:18px 0 4px}
    .section-header{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-header h2{margin:0;font-size:28px}
    .section-header p{margin:0;color:var(--muted);max-width:58ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:22px}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,rgba(79,70,229,.12),rgba(6,182,212,.12));color:#4338ca;font-weight:800;margin-bottom:14px
    }
    .flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{padding:22px;border-radius:20px;background:#fff;border:1px solid #e1e9f6;position:relative}
    .step .num{font-size:12px;color:#6366f1;font-weight:800;letter-spacing:.12em}
    .step h3{margin:10px 0 8px;font-size:18px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .compare-box{padding:18px;overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:900px}
    th,td{padding:14px 12px;border-bottom:1px solid #e6edf7;text-align:left;vertical-align:top}
    th{background:#f8fbff;color:#0f172a;font-size:14px}
    td{color:#334155;font-size:14px;line-height:1.65}
    .badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eef2ff;color:#4338ca;font-weight:700;font-size:12px}
    .highlight{color:#0f172a;font-weight:700}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start
    }
    .price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price-box{padding:22px}
    .price-box .cost{font-size:30px;font-weight:800;margin:10px 0 8px;color:#0f172a}
    .price-box ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.9}
    .timeline{display:grid;gap:14px}
    .timeline-item{padding:18px 20px;display:flex;gap:14px;align-items:flex-start}
    .timeline-dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary2));margin-top:6px;flex:0 0 12px}
    .timeline-item h3{margin:0 0 6px;font-size:16px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:transparent;border:0;display:flex;align-items:center;justify-content:space-between;
      color:#0f172a;font-size:16px;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;border-top:1px solid transparent}
    .faq-a p{margin:0;padding:0 20px 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{max-height:220px;border-top-color:#edf2fb}
    .faq-item.open .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:transform .25s}
    .testimonials{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote{padding:22px}
    .quote .who{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .quote strong{font-size:15px}
    .quote span{font-size:12px;color:#64748b}
    .quote p{margin:0;color:var(--muted);line-height:1.8}
    .article-list{display:grid;gap:12px}
    .article-item{padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .article-item b{display:block;margin-bottom:6px}
    .article-item small{color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .form-panel{padding:24px}
    form{display:grid;gap:14px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:700;color:#1e293b}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid #d7e0ef;background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:#0f172a;outline:none;transition:.2s
    }
    .field textarea{min-height:120px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#8b5cf6;box-shadow:0 0 0 4px rgba(139,92,246,.12)}
    .contact-cards{display:grid;gap:12px}
    .contact-card{padding:18px;border-radius:18px;background:#fff;border:1px solid #e0e8f5}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:52px;height:52px;border-radius:18px;border:0;display:flex;align-items:center;justify-content:center;
      box-shadow:0 14px 30px rgba(15,23,42,.16);background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;cursor:pointer
    }
    footer{
      margin-top:24px;padding:28px 0 22px;background:#0f172a;color:#dbe7ff
    }
    footer .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px;align-items:start}
    footer a{color:#ffffff}
    footer p,footer li,footer small{color:#c9d7ef;line-height:1.8}
    footer ul{margin:0;padding-left:18px}
    .footer-brand{display:flex;align-items:center;gap:12px}
    .footer-brand img{width:44px;height:44px;object-fit:contain;background:#fff;border-radius:12px;padding:4px}
    .section-anchor{scroll-margin-top:92px}
    .muted{color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid #dce5f2;color:#334155;font-size:13px}
    .service-net{padding:22px}
    .service-net .net-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .net-item{padding:14px 14px;border-radius:16px;background:#f8fbff;border:1px solid #e5edf8;color:#334155}
    .hero-image-box{
      padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff,#f5f8ff);border:1px solid #e0e8f5;display:grid;gap:12px
    }
    .hero-image-box .ai-page-image{border-radius:16px;overflow:hidden}
    .mobile-nav{display:none}
    .mini-toolbar{display:flex;gap:10px;flex-wrap:wrap}
    .rating{display:flex;gap:6px;color:#f59e0b;font-size:18px;letter-spacing:2px}
    @media (max-width: 1100px){
      .hero-grid,.grid-3,.grid-4,.flow,.price-grid,.testimonials,.split,.form-grid,.service-net .net-grid,footer .footer-grid{grid-template-columns:1fr 1fr}
      .section-header{align-items:start;flex-direction:column}
    }
    @media (max-width: 760px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-nav{display:none;padding:0 0 16px}
      .mobile-nav.open{display:block}
      .mobile-nav .nav-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}
      .mobile-nav .nav-links a{background:#fff;border:1px solid #e1e8f5;text-align:center}
      .hero{padding-top:22px}
      .hero-main{padding:24px}
      .hero-grid,.grid-3,.grid-4,.flow,.price-grid,.testimonials,.split,.form-grid,.service-net .net-grid,footer .footer-grid{grid-template-columns:1fr}
      .hero-stats{grid-template-columns:1fr 1fr}
      h1{font-size:34px}
      .compare-box{padding:0}
      table{min-width:760px}
      .floating{right:14px;bottom:14px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease, transform .55s ease}
    .reveal.show{opacity:1;transform:none}