:root{
      --bg:#f5f7fb;--panel:#ffffff;--panel2:#f8fbff;--text:#162033;--muted:#5f6b82;--line:#dde5f2;
      --primary:#2563eb;--primary2:#7c3aed;--accent:#14b8a6;--warm:#f97316;--shadow:0 18px 45px rgba(32,54,96,.08);
      --radius:20px;--container:1180px;
    }
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at 15% 10%, rgba(124,58,237,.08), transparent 30%),
      radial-gradient(circle at 85% 0%, rgba(20,184,166,.08), transparent 24%),
      linear-gradient(180deg,#fbfcff 0%,#f5f7fb 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(245,247,251,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(221,229,242,.7)}
    .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;padding:5px;box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand h1{font-size:18px;line-height:1.1;margin:0;font-weight:800;letter-spacing:.2px}
    .brand p{margin:4px 0 0;color:var(--muted);font-size:12px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#334155;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{background:#eaf1ff;color:#1746b6}
    .hero{padding:42px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-card,.glass-card,.section-card,.form-card{background:linear-gradient(180deg,rgba(255,255,255,.94),#fff);border:1px solid rgba(221,229,242,.92);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:30px;position:relative;overflow:hidden}
    .hero-card:before{content:"";position:absolute;inset:-40% -10% auto auto;width:280px;height:280px;background:radial-gradient(circle,rgba(37,99,235,.12),transparent 65%);pointer-events:none}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#edf5ff;color:#1d4ed8;font-size:13px;font-weight:700}
    .hero h2{font-size:44px;line-height:1.08;margin:16px 0 14px;letter-spacing:-.6px}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:720px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:.2s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 24px rgba(37,99,235,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.08)}
    .hero-right{display:grid;gap:14px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .stat{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:28px;line-height:1.1;color:#0f172a}
    .stat span{display:block;margin-top:7px;color:var(--muted);font-size:13px;line-height:1.5}
    .mini-panel{padding:18px;border-radius:18px;background:linear-gradient(135deg,#eef6ff,#f7f0ff);border:1px solid rgba(37,99,235,.12)}
    .mini-panel h3{margin:0 0 10px;font-size:16px}
    .mini-tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid rgba(148,163,184,.35);font-size:12px;color:#334155}
    main{padding-bottom:10px}
    section{padding:16px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin:6px 0 14px}
    .section-head h3{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:680px;line-height:1.7}
    .section-card{padding:24px}
    .about-grid,.service-grid,.feature-grid,.case-grid,.review-grid,.article-grid,.network-grid,.compare-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .about-main{grid-column:span 2}
    .card{padding:20px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,#fff,#fbfdff);transition:.2s ease}
    .card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(15,23,42,.07)}
    .card h4{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.8}
    .icon{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#e0edff,#f1e8ff);margin-bottom:12px;color:#2b4fd6;font-weight:800}
    .workflow,.timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step,.timeline-item{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step-num,.timeline-num{display:inline-flex;width:30px;height:30px;border-radius:50%;align-items:center;justify-content:center;background:#eff6ff;color:#1d4ed8;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:15px 16px;text-align:left;border-bottom:1px solid #edf2f7;vertical-align:top}
    th{background:#f8fbff;color:#1e293b}
    td{color:var(--muted)}
    .faq-list details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:0 16px;margin-bottom:12px;overflow:hidden}
    .faq-list summary{list-style:none;cursor:pointer;padding:16px 0;font-weight:700;color:#1e293b}
    .faq-list summary::-webkit-details-marker{display:none}
    .faq-list .answer{padding:0 0 16px;color:var(--muted);line-height:1.8}
    .reviews .card strong{display:block;margin-bottom:6px}
    .review-meta{font-size:13px;color:#6b7280;margin-bottom:10px}
    .article-grid .card a{color:#1d4ed8;font-weight:700}
    .badge-row,.cloud{display:flex;flex-wrap:wrap;gap:10px}
    .price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .price{padding:20px;border-radius:18px;border:1px solid var(--line);background:#fff}
    .price .num{font-size:30px;font-weight:800;color:#111827}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-group{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#243044}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #dbe3f0;background:#fff;color:#111827;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7c3aed;box-shadow:0 0 0 3px rgba(124,58,237,.12)}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px}
    .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
    .contact-box,.code-box{padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .contact-list{display:grid;gap:10px;margin-top:14px}
    .contact-list div{display:flex;justify-content:space-between;gap:16px;padding:12px 14px;border-radius:14px;background:#f8fbff;border:1px solid #edf2f7}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    footer{margin-top:16px;background:#0f172a;color:#dbe7ff}
    footer .container{padding:26px 0}
    footer a{color:#fff}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer-note{margin-top:14px;color:#bfd0ff;line-height:1.8}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.3)}
    .float-btn.secondary{background:#fff;color:#1d4ed8;border:1px solid var(--line)}
    .mobile-panel{display:none}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .scroll-reveal.show{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.about-grid,.service-grid,.feature-grid,.case-grid,.review-grid,.article-grid,.network-grid,.compare-grid,.price-grid,.contact-grid,.footer-top,.workflow,.timeline{grid-template-columns:1fr}
      .about-main,.hero h2{font-size:36px;grid-column:auto}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}.menu-btn{display:inline-flex}
      .mobile-panel{display:none;padding:0 0 14px}
      .mobile-panel.open{display:block}
      .mobile-panel .nav-links{display:flex;flex-direction:column;align-items:stretch;gap:6px;padding:10px 0 0}
      .mobile-panel .nav-links a{background:#fff;border:1px solid var(--line)}
      .form-grid{grid-template-columns:1fr}
    }