:root{
      --bg:#f6f7fb;
      --card:#ffffff;
      --card2:#fdf9f3;
      --text:#1f2937;
      --muted:#5b6472;
      --line:#e6e8ef;
      --primary:#4f7cff;
      --primary2:#7c4dff;
      --accent:#ff7a59;
      --accent2:#19b7a6;
      --shadow:0 18px 50px rgba(31,41,55,.08);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:Arial,Helvetica,"PingFang SC","Microsoft YaHei",sans-serif;background:
      radial-gradient(circle at 10% 0%, rgba(124,77,255,.08), transparent 28%),
      radial-gradient(circle at 90% 10%, rgba(79,124,255,.10), transparent 26%),
      linear-gradient(180deg,#fbfcff 0%, #f6f7fb 38%, #f8fafc 100%);
      color:var(--text);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(230,232,239,.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}
    .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:0 8px 24px rgba(79,124,255,.12)}
    .brand h1,.brand strong{font-size:18px;line-height:1.2;margin:0}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#344054;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover{background:#eef3ff;color:#2540a4}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.22s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 30px rgba(79,124,255,.28)}
    .btn-light{background:#fff;color:#21314f;border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:52px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:24px;align-items:stretch}
    .hero-copy{background:linear-gradient(145deg,rgba(255,255,255,.96),rgba(245,247,255,.92));border:1px solid rgba(230,232,239,.9);border-radius:28px;padding:30px;box-shadow:var(--shadow);position:relative;overflow:hidden}
    .hero-copy:before{content:"";position:absolute;inset:auto -30px -40px auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(79,124,255,.17),transparent 66%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eef4ff;color:#2947b6;border:1px solid #dbe6ff;padding:7px 12px;border-radius:999px;font-size:13px;font-weight:700}
    .hero h1{font-size:clamp(30px,5vw,56px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:22px}
    .mini{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;min-height:92px}
    .mini strong{display:block;font-size:18px}
    .mini span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .hero-panel{display:grid;gap:14px}
    .panel-card{background:linear-gradient(180deg,#fff, #fcfdff);border:1px solid var(--line);border-radius:26px;padding:22px;box-shadow:var(--shadow)}
    .panel-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px}
    .tag{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#f2f7ff;color:#3151c6;font-size:12px;font-weight:700}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7f9ff);border:1px solid #edf0f7}
    .stat b{display:block;font-size:22px;margin-bottom:2px}
    .stat small{color:var(--muted)}
    .section{padding:26px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;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:68ch}
    .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{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 10px 28px rgba(31,41,55,.05);transition:.22s}
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p,.card li{color:var(--muted)}
    .badge{display:inline-flex;padding:5px 10px;border-radius:999px;background:rgba(25,183,166,.10);color:#0f7d74;font-size:12px;font-weight:700;margin-bottom:10px}
    .pill-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:14px;color:#374151}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .step{background:linear-gradient(180deg,#fff,#fbfcff);border:1px solid var(--line);border-radius:22px;padding:18px}
    .step-num{width:34px;height:34px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#ff8a65,#ffb74d);color:#fff;font-weight:800;margin-bottom:10px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:840px}
    th,td{padding:16px 14px;border-bottom:1px solid #eef1f5;text-align:left;vertical-align:top}
    th{background:#f8faff;color:#23324d;font-size:14px}
    .check{color:#168a58;font-weight:700}
    .x{color:#b54708;font-weight:700}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .quote-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote{padding:20px;border-radius:22px;background:linear-gradient(180deg,#fff,#fbfdff);border:1px solid var(--line)}
    .quote .role{color:#335; font-weight:700;margin-bottom:8px}
    .article-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .article{display:flex;gap:14px;align-items:flex-start}
    .article .thumb{width:96px;height:72px;border-radius:16px;flex:0 0 auto;object-fit:cover;border:1px solid var(--line)}
    .form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    input,select,textarea{width:100%;border:1px solid #d9deea;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:128px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#7b95ff;box-shadow:0 0 0 4px rgba(79,124,255,.12)}
    .footer{margin-top:28px;padding:22px 0 32px;background:#f8fafc;border-top:1px solid #e5e7ef;color:#24324a}
    .footer a{color:#264de4}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .small{font-size:13px;color:#667085}
    .floating{position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px}
    .floating a,.floating button{width:52px;height:52px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);display:grid;place-items:center;cursor:pointer}
    .floating svg{width:22px;height:22px}
    .fade-in{opacity:0;transform:translateY(14px);transition:.6s ease}
    .fade-in.show{opacity:1;transform:none}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 16px}
    .faq summary{cursor:pointer;font-weight:700;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:10px 0 0;color:var(--muted)}
    .mobile-nav{display:none}
    .ai-page-image{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .service-net{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
    .price{background:linear-gradient(135deg,#fff8f2,#fff);border:1px solid #f1e2d7}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.two-col,.quote-grid,.article-list,.footer-grid,.service-net,.timeline{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links,.nav-cta{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-nav{display:none;padding:0 0 14px}
      .mobile-nav.show{display:block}
      .mobile-nav a{display:block;padding:10px 0;border-top:1px solid #edf0f4;color:#344054}
    }
    @media (max-width: 640px){
      .hero,.section{padding-left:0;padding-right:0}
      .hero-grid,.grid-4,.grid-3,.two-col,.quote-grid,.article-list,.footer-grid,.service-net,.timeline,.stat-grid,.form{grid-template-columns:1fr}
      .hero-copy,.panel-card,.card,.step,.quote{padding:18px}
      .section-head{flex-direction:column;align-items:flex-start}
    }