:root{
      --bg:#f4f7fb;
      --panel:#ffffff;
      --panel-2:#eef4ff;
      --text:#132033;
      --muted:#5f6f86;
      --brand:#0d4ed8;
      --brand-2:#1e88ff;
      --line:#dbe4f0;
      --shadow:0 18px 50px rgba(17, 45, 99, .10);
      --radius:22px;
      --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",sans-serif;background:linear-gradient(180deg,#f7fbff 0%,#f3f7fc 100%);color:var(--text)}
    a{color:var(--brand);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:30;background:rgba(247,250,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,228,240,.8)}
    .nav{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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:6px;box-shadow:0 8px 20px rgba(13,78,216,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px}
    .nav-links a:hover,.nav-links a.active{background:#eaf2ff;color:var(--brand)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px}
    main{overflow:hidden}
    .hero{padding:34px 0 20px;background:
      radial-gradient(circle at 18% 20%, rgba(30,136,255,.18), transparent 28%),
      radial-gradient(circle at 86% 16%, rgba(13,78,216,.14), transparent 25%),
      linear-gradient(180deg,#eef5ff 0%,#f7fbff 100%)}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-card,.info-card,.section-card,.panel{background:rgba(255,255,255,.92);border:1px solid rgba(219,228,240,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:30px;position:relative;overflow:hidden}
    .hero-card:before{content:"";position:absolute;inset:auto -30px -30px auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle, rgba(30,136,255,.16), transparent 65%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eaf2ff;color:var(--brand);font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:56ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:14px;padding:13px 18px;font-weight:700;border:1px solid transparent;transition:.22s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 24px rgba(13,78,216,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(13,78,216,.12)}
    .hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .metric{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff 0%,#f4f8ff 100%);border:1px solid var(--line)}
    .metric strong{display:block;font-size:24px;color:var(--brand);margin-bottom:8px}
    .metric span{font-size:13px;color:var(--muted);line-height:1.55}
    section{padding:22px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:64ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{padding:22px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 28px rgba(18,41,84,.06);transition:transform .22s ease,box-shadow .22s ease}
    .card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(18,41,84,.10)}
    .card h3{margin:0 0 10px;font-size:19px}
    .card p,.card li{color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#eef4ff;border:1px solid #d8e4fb;color:#234; font-size:13px}
    .service-list,.steps,.timeline{display:grid;gap:14px}
    .service-item,.step-item,.timeline-item{display:flex;gap:14px;align-items:flex-start;padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#0d4ed8,#1e88ff);color:#fff;font-weight:800;flex:0 0 auto}
    .compare-wrap,.table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f3f7ff;color:#16314f;font-size:14px}
    td{color:var(--muted);font-size:14px}
    .rating{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#ecf5ff;color:#0d4ed8;font-weight:700}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px}
    .faq summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700;color:var(--text)}
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{padding:0 0 16px;color:var(--muted);line-height:1.8}
    .comment-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .comment .meta{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}
    .avatar{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#eaf2ff;color:var(--brand);font-weight:800}
    .stars{color:#ffb200;letter-spacing:2px;font-size:14px}
    .article-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .article-list a{display:block;padding:18px;border-radius:18px;border:1px solid var(--line);background:#fff;color:var(--text)}
    .article-list a:hover{border-color:#b9cff7;box-shadow:0 12px 26px rgba(13,78,216,.08)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:14px}
    input,select,textarea{width:100%;border:1px solid #cfd9e8;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);background:#fff;outline:none}
    input:focus,select:focus,textarea:focus{border-color:#7aa7ff;box-shadow:0 0 0 4px rgba(13,78,216,.10)}
    textarea{min-height:120px;resize:vertical}
    footer{margin-top:12px;background:#eaf0fb;border-top:1px solid var(--line);color:#22344d}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;padding:22px 0}
    .footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .footer-links a{color:#1c3557}
    .floating{position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 14px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 14px 30px rgba(13,78,216,.25)}
    .backtop{border:none;cursor:pointer}
    .fade-in{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
    .fade-in.show{opacity:1;transform:none}
    .network{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .mini{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff}
    .mini strong{display:block;font-size:18px;color:var(--brand);margin-bottom:6px}
    .mobile-only{display:none}
    .hero-side{display:grid;gap:16px}
    .panel{padding:20px}
    .panel h3{margin:0 0 12px}
    .kefu{display:grid;grid-template-columns:110px 1fr;gap:14px;align-items:center}
    .ai-page-image{border-radius:18px;border:1px solid var(--line)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.comment-grid,.article-list,.footer-grid,.network{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .nav-links.open{display:flex;position:absolute;left:16px;right:16px;top:68px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);padding:12px;border-radius:18px;box-shadow:var(--shadow)}
      .nav{position:relative}
      .hero-card{padding:22px}
      .hero-metrics{grid-template-columns:1fr 1fr}
      .form-grid{grid-template-columns:1fr}
      .field.full{grid-column:auto}
      .mobile-only{display:block}
      .kefu{grid-template-columns:88px 1fr}
      .network{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 560px){
      .container{width:min(var(--container),calc(100% - 24px))}
      .hero-metrics,.network{grid-template-columns:1fr}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
    }