:root{
      --bg:#f7f8fb;
      --panel:#ffffff;
      --panel2:#f4f7ff;
      --text:#182235;
      --muted:#5d687e;
      --line:#dde4f0;
      --brand:#2f6bff;
      --brand2:#7c4dff;
      --accent:#00b8a9;
      --warm:#ffb54d;
      --shadow:0 18px 50px rgba(29,48,99,.10);
      --radius:22px;
      --radius-sm:16px;
      --max: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(circle at top left, rgba(47,107,255,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(0,184,169,.10), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, #f7f8fb 38%, #f5f7fc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky; top:0; z-index:60;
      backdrop-filter: blur(16px);
      background:rgba(247,248,251,.84);
      border-bottom:1px solid rgba(221,228,240,.8);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:18px;
      min-height:76px; padding:10px 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:10px; background:#fff; box-shadow:0 8px 24px rgba(47,107,255,.10)}
    .brand-text{display:flex; flex-direction:column; min-width:0}
    .brand-text strong{font-size:18px; line-height:1.1}
    .brand-text span{font-size:12px; color:var(--muted); margin-top:4px}
    .nav-links{display:flex; flex-wrap:wrap; justify-content:flex-end; gap:10px 16px; align-items:center}
    .nav-links a{
      font-size:14px; color:#24314a; padding:8px 10px; border-radius:999px;
      transition:.2s ease; white-space:nowrap
    }
    .nav-links a:hover{background:#eef3ff; color:var(--brand)}
    .nav-cta{display:flex; gap:10px; align-items:center}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:0; cursor:pointer; transition:.22s ease; border-radius:999px;
      padding:12px 18px; font-weight:700; font-size:14px;
      box-shadow:0 10px 24px rgba(47,107,255,.14);
    }
    .btn-primary{background:linear-gradient(135deg, var(--brand), var(--brand2)); color:#fff}
    .btn-secondary{background:#fff; color:#25324a; border:1px solid var(--line); box-shadow:none}
    .btn:hover{transform:translateY(-2px)}
    .menu-toggle{display:none; background:#fff; border:1px solid var(--line); width:44px; height:44px; border-radius:12px; align-items:center; justify-content:center}
    .menu-toggle span{display:block; width:18px; height:2px; background:#263248; position:relative}
    .menu-toggle span:before,.menu-toggle span:after{content:""; position:absolute; left:0; width:18px; height:2px; background:#263248}
    .menu-toggle span:before{top:-6px}.menu-toggle span:after{top:6px}
    .hero{padding:40px 0 24px}
    .hero-grid{display:grid; grid-template-columns:1.15fr .85fr; gap:22px; align-items:stretch}
    .hero-main,.hero-side,.card,.section{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.92));
      border:1px solid rgba(221,228,240,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:32px; position:relative; overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:""; position:absolute; border-radius:50%;
      filter:blur(4px); pointer-events:none;
    }
    .hero-main:before{width:240px; height:240px; right:-80px; top:-86px; background:radial-gradient(circle, rgba(47,107,255,.16), transparent 65%)}
    .hero-main:after{width:180px; height:180px; left:-70px; bottom:-90px; background:radial-gradient(circle, rgba(0,184,169,.12), transparent 65%)}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      background:#eef4ff; color:#2753d3; padding:8px 12px; border-radius:999px;
      font-size:13px; font-weight:700;
    }
    h1{font-size:clamp(30px, 5vw, 54px); line-height:1.08; margin:16px 0 14px}
    .hero p{margin:0; color:var(--muted); font-size:16px; line-height:1.8; max-width:62ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:24px}
    .hero-stats{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px}
    .stat{
      padding:16px; border-radius:18px; background:linear-gradient(180deg, #f9fbff, #f3f7ff);
      border:1px solid rgba(221,228,240,.85);
    }
    .stat strong{display:block; font-size:24px; color:#123; margin-bottom:6px}
    .stat span{font-size:13px; color:var(--muted); line-height:1.5}
    .hero-side{padding:18px; display:grid; gap:14px}
    .side-panel{background:linear-gradient(180deg,#fff,#f7f9ff); border:1px solid var(--line); border-radius:20px; padding:18px}
    .side-panel h3{margin:0 0 10px; font-size:18px}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{font-size:13px; padding:8px 11px; border-radius:999px; background:#f4f7ff; color:#284064; border:1px solid #e3e9f7}
    .section{padding:28px; margin-top:18px}
    .section h2{font-size:28px; margin:0 0 12px}
    .section .sub{color:var(--muted); margin:0 0 22px; line-height:1.8}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .card{padding:20px; border-radius:20px}
    .card h3{margin:0 0 10px; font-size:18px}
    .card p, .card li{color:var(--muted); line-height:1.75}
    .feature-list{display:grid; gap:12px; margin:0; padding:0; list-style:none}
    .feature-list li{padding:12px 14px; background:#f8fbff; border:1px solid #e5ebf5; border-radius:16px}
    .accent-badge{display:inline-flex; padding:6px 10px; border-radius:999px; background:#fff6e8; color:#9a5b00; font-size:12px; font-weight:700; margin-bottom:12px}
    .steps{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff,#f7f9ff); border:1px solid var(--line)}
    .step .n{width:34px; height:34px; display:grid; place-items:center; border-radius:50%; background:linear-gradient(135deg,var(--brand),var(--accent)); color:#fff; font-weight:800; margin-bottom:10px}
    .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:14px 16px; border-bottom:1px solid #e8edf5; text-align:left; vertical-align:top; font-size:14px}
    th{background:#f5f8ff; color:#20304a}
    .rating{display:flex; flex-wrap:wrap; gap:10px; align-items:center}
    .stars{color:#ff9f1c; letter-spacing:1px; font-size:20px}
    details{
      background:#fff; border:1px solid var(--line); border-radius:16px; padding:0 16px; box-shadow:none
    }
    details + details{margin-top:12px}
    summary{cursor:pointer; list-style:none; padding:16px 0; font-weight:700; color:#20304a}
    summary::-webkit-details-marker{display:none}
    details p{margin:0 0 16px; color:var(--muted); line-height:1.8}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review{padding:20px; position:relative}
    .review .role{font-size:13px; color:#2753d3; font-weight:700; margin-bottom:10px}
    .review .quote{color:var(--muted); line-height:1.8}
    .review .name{margin-top:14px; font-weight:700}
    .article-list{display:grid; gap:12px}
    .article-item{
      display:flex; justify-content:space-between; gap:14px; padding:14px 16px;
      border:1px solid var(--line); border-radius:16px; background:#fff
    }
    .article-item span{color:var(--muted); font-size:13px}
    .form-grid{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    .field{display:flex; flex-direction:column; gap:8px}
    .field label{font-weight:700; font-size:14px}
    input,select,textarea{
      width:100%; border:1px solid #dbe3f0; border-radius:14px; background:#fff; color:var(--text);
      padding:13px 14px; font:inherit; outline:none; transition:.2s ease
    }
    textarea{min-height:122px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8fb0ff; box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .form-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:6px}
    .footer{
      margin-top:18px; padding:26px 0 28px; border-top:1px solid rgba(221,228,240,.9); color:#25324a;
      background:rgba(255,255,255,.62)
    }
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:18px}
    .footer a{color:#294eaa}
    .footer small{color:#64708a; line-height:1.8}
    .float-box{
      position:fixed; right:16px; bottom:16px; z-index:80; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; box-shadow:0 18px 28px rgba(47,107,255,.24);
      border:0; cursor:pointer
    }
    .float-link{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center;
      background:#fff; border:1px solid var(--line); color:#22314a; box-shadow:0 12px 24px rgba(28,43,79,.10)
    }
    .floating-contact{
      position:fixed; left:16px; bottom:16px; z-index:79; width:min(290px, calc(100vw - 32px));
      display:none; background:#fff; border:1px solid var(--line); border-radius:20px; padding:14px; box-shadow:var(--shadow)
    }
    .floating-contact.open{display:block}
    .floating-contact .qrcode{display:flex; gap:12px; align-items:center}
    .floating-contact img{width:86px; height:86px; object-fit:cover; border-radius:14px; border:1px solid var(--line)}
    .backdrop{display:none}
    .scroll-reveal{opacity:0; transform:translateY(16px); transition:.7s ease}
    .scroll-reveal.in{opacity:1; transform:translateY(0)}
    .mini-note{font-size:12px; color:var(--muted)}
    .banner-row{display:grid; grid-template-columns:repeat(4,1fr); gap:12px}
    .banner-row img{border-radius:18px; border:1px solid var(--line); box-shadow:0 12px 24px rgba(18,31,57,.06)}
    .link-set{display:flex; flex-wrap:wrap; gap:10px}
    .link-set a{padding:8px 12px; border-radius:999px; background:#f4f7ff; border:1px solid #e3e9f7; font-size:13px}
    .service-network{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .network-item{padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff,#f6f8ff); border:1px solid var(--line)}
    @media (max-width: 1024px){
      .hero-grid,.grid-3,.reviews,.footer-grid,.service-network,.banner-row{grid-template-columns:1fr 1fr}
      .steps{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .nav{min-height:68px}
      .menu-toggle{display:inline-flex}
      .nav-links{
        display:none; position:absolute; left:16px; right:16px; top:78px; background:#fff;
        border:1px solid var(--line); border-radius:20px; padding:12px; box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex; flex-direction:column; align-items:flex-start}
      .nav-cta{display:none}
      .hero{padding-top:20px}
      .hero-grid,.grid-2,.grid-3,.reviews,.footer-grid,.steps,.form-grid,.banner-row,.service-network{grid-template-columns:1fr}
      .hero-main,.hero-side,.section{padding:20px}
      .hero-stats{grid-template-columns:1fr}
      .table-wrap{border-radius:14px}
      .backdrop{display:block; position:fixed; inset:0; background:rgba(18,27,44,.25); z-index:55; opacity:0; pointer-events:none; transition:.2s ease}
      .backdrop.show{opacity:1; pointer-events:auto}
      .float-box{right:12px; bottom:12px}
      .floating-contact{left:12px; right:12px; width:auto}
    }