:root{
      --bg:#f5f7f2;
      --surface:#ffffff;
      --surface-2:#f0f6ef;
      --text:#16311f;
      --muted:#5f6f64;
      --line:#dbe7d8;
      --primary:#19c37d;
      --primary-2:#0ea76b;
      --accent:#7df0b6;
      --warm:#f7fdf8;
      --shadow:0 14px 40px rgba(20,56,38,.10);
      --shadow-2:0 10px 24px rgba(20,56,38,.08);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(25,195,125,.10), transparent 28%),
        radial-gradient(circle at 80% 10%, rgba(125,240,182,.12), transparent 26%),
        linear-gradient(180deg, #fbfefb 0%, var(--bg) 100%);
      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}
    header,main,footer{position:relative}
    .topbar{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(245,247,242,.82);
      border-bottom:1px solid rgba(219,231,216,.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}
    .brand .ai-page-logo{width:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; padding:4px; box-shadow:var(--shadow-2)}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:18px; letter-spacing:.5px}
    .brand-text span{display:block; font-size:12px; color:var(--muted)}
    .navlinks{display:flex; flex-wrap:wrap; gap:10px; justify-content:flex-end; align-items:center}
    .navlinks a{
      font-size:14px; color:var(--text); padding:8px 12px; border-radius:999px;
      transition:.2s ease; border:1px solid transparent;
    }
    .navlinks a:hover{background:#fff;border-color:var(--line); box-shadow:var(--shadow-2)}
    .nav-cta{display:flex; gap:10px; align-items:center}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:12px 18px; border-radius:999px; border:1px solid transparent;
      font-weight:700; transition:.2s ease; cursor:pointer; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2)); color:#fff; box-shadow:0 12px 24px rgba(25,195,125,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 30px rgba(25,195,125,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px)}
    .menu-toggle{display:none}
    .hero{
      padding:34px 0 18px;
    }
    .hero-shell{
      background:
        linear-gradient(135deg, rgba(255,255,255,.88), rgba(241,250,244,.92)),
        linear-gradient(180deg, rgba(255,255,255,.8), rgba(255,255,255,.8));
      border:1px solid rgba(219,231,216,.95);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-shell::before,.hero-shell::after{
      content:""; position:absolute; border-radius:50%;
      background:radial-gradient(circle, rgba(25,195,125,.16), transparent 70%);
      pointer-events:none;
    }
    .hero-shell::before{width:300px;height:300px; right:-90px; top:-110px}
    .hero-shell::after{width:240px;height:240px; left:-100px; bottom:-110px}
    .hero-inner{
      display:grid; grid-template-columns:1.2fr .8fr; gap:24px; align-items:stretch;
      padding:34px;
    }
    h1{margin:0 0 14px; font-size:clamp(30px,4vw,54px); line-height:1.12; letter-spacing:-.02em}
    .hero p{margin:0 0 18px; color:var(--muted); font-size:16px; max-width:62ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:18px}
    .hero-tags{display:flex; flex-wrap:wrap; gap:10px}
    .tag{
      padding:8px 12px; border-radius:999px; background:#eef8f1; color:#245238;
      border:1px solid #d9eadc; font-size:13px;
    }
    .hero-card{
      background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(237,248,240,.92));
      border:1px solid var(--line); border-radius:24px; padding:22px; box-shadow:var(--shadow-2);
      display:flex; flex-direction:column; gap:14px; justify-content:space-between;
    }
    .stats{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .stat{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:14px;
    }
    .stat strong{display:block; font-size:24px; line-height:1.1}
    .stat span{font-size:13px; color:var(--muted)}
    .hero-mini{
      padding:14px; border-radius:18px; background:linear-gradient(135deg,#0f6b47,#1dc47e);
      color:#fff; box-shadow:0 14px 24px rgba(15,107,71,.18);
    }
    .hero-mini p{color:rgba(255,255,255,.88); margin:8px 0 0}
    section{padding:18px 0}
    .section-title{
      display:flex; align-items:end; justify-content:space-between; gap:18px; margin-bottom:16px;
    }
    .section-title h2{margin:0; font-size:clamp(24px,2.5vw,34px); line-height:1.2}
    .section-title p{margin:0; color:var(--muted); max-width:68ch}
    .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{
      background:var(--surface); border:1px solid var(--line); border-radius:var(--radius);
      box-shadow:var(--shadow-2); padding:20px; transition:.22s ease;
    }
    .card:hover{transform:translateY(-4px); box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px; font-size:20px}
    .card p{margin:0; color:var(--muted)}
    .feature-list{display:grid; gap:10px; margin-top:14px}
    .feature-list span{
      display:flex; gap:10px; align-items:flex-start; color:#234434; font-size:14px;
    }
    .dot{width:10px;height:10px;border-radius:50%; background:var(--primary); margin-top:8px; flex:0 0 auto}
    .metric-bar{
      display:flex; flex-wrap:wrap; gap:12px;
    }
    .metric{
      flex:1 1 180px; background:linear-gradient(180deg,#fff, #f7fbf7);
      border:1px solid var(--line); border-radius:20px; padding:18px;
    }
    .metric strong{display:block; font-size:28px}
    .metric span{color:var(--muted); font-size:13px}
    .table-wrap{overflow:auto; border-radius:22px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow-2)}
    table{width:100%; border-collapse:collapse; min-width:860px}
    th,td{padding:15px 16px; text-align:left; border-bottom:1px solid #e8efe6; vertical-align:top}
    th{background:#f4fbf5; font-size:14px}
    td{font-size:14px; color:#274433}
    .badge{display:inline-flex; align-items:center; padding:6px 10px; border-radius:999px; background:#e7fbef; color:#0d6a43; font-size:12px; font-weight:700}
    .timeline{display:grid; gap:14px}
    .step{
      display:grid; grid-template-columns:64px 1fr; gap:14px; align-items:start;
      background:#fff; border:1px solid var(--line); border-radius:20px; padding:18px;
    }
    .step-num{
      width:52px; height:52px; border-radius:16px; background:linear-gradient(135deg,var(--primary),var(--accent));
      color:#fff; display:flex; align-items:center; justify-content:center; font-weight:800;
      box-shadow:0 12px 20px rgba(25,195,125,.2);
    }
    .step h3{margin:0 0 8px; font-size:18px}
    .step p{margin:0; color:var(--muted)}
    .gallery{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .gallery .card img{width:100%; border-radius:16px; border:1px solid var(--line); background:#fff}
    .quote-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .quote{
      background:linear-gradient(180deg,#fff, #f6fbf7); border:1px solid var(--line); border-radius:22px; padding:18px;
    }
    .quote strong{display:block; margin-bottom:6px}
    .quote span{font-size:13px; color:var(--muted)}
    .faq{display:grid; gap:12px}
    details{
      background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow-2); overflow:hidden;
    }
    summary{
      list-style:none; cursor:pointer; padding:18px 18px; font-weight:700; display:flex; justify-content:space-between; gap:16px;
    }
    summary::-webkit-details-marker{display:none}
    details p{margin:0; padding:0 18px 18px; color:var(--muted)}
    .form-card form{display:grid; gap:14px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:grid; gap:8px; font-size:14px; font-weight:600}
    input,select,textarea{
      width:100%; border:1px solid #cad9c8; border-radius:14px; padding:13px 14px;
      font:inherit; color:var(--text); background:#fff; outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--primary); box-shadow:0 0 0 4px rgba(25,195,125,.12)}
    .split{
      display:grid; grid-template-columns:1fr .95fr; gap:16px;
      align-items:start;
    }
    .articles{display:grid; gap:12px}
    .article{
      display:flex; justify-content:space-between; gap:16px; align-items:flex-start;
      padding:16px 18px; border-radius:18px; background:#fff; border:1px solid var(--line);
    }
    .article p{margin:0; color:var(--muted); font-size:14px}
    .article strong{display:block; margin-bottom:6px}
    footer{
      margin-top:18px; padding:22px 0 28px; background:#f2f7f2; border-top:1px solid var(--line);
      color:#274433;
    }
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr 1fr; gap:16px}
    .footer-box{background:#fff; border:1px solid var(--line); border-radius:20px; padding:18px; box-shadow:var(--shadow-2)}
    .footer-links{display:flex; flex-wrap:wrap; gap:10px}
    .footer-links a{padding:8px 12px; border-radius:999px; background:#eef8f1; border:1px solid #d7e8d8; font-size:13px}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:60; display:grid; gap:10px;
    }
    .float-btn{
      width:52px; height:52px; border-radius:50%; display:flex; align-items:center; justify-content:center;
      background:linear-gradient(135deg,var(--primary),var(--primary-2)); color:#fff; box-shadow:var(--shadow);
      border:none; cursor:pointer;
    }
    .floating-panel{
      position:fixed; right:18px; bottom:82px; width:min(320px, calc(100vw - 36px));
      background:#fff; border:1px solid var(--line); border-radius:22px; box-shadow:var(--shadow);
      padding:16px; display:none;
    }
    .floating-panel.show{display:block}
    .floating-panel h3{margin:0 0 10px}
    .floating-panel .qrcode{display:flex; gap:12px; align-items:center}
    .floating-panel img{width:92px; height:92px; object-fit:cover; border-radius:14px; border:1px solid var(--line)}
    .reveal{opacity:0; transform:translateY(14px); transition:.55s ease}
    .reveal.visible{opacity:1; transform:none}
    .mobile-only{display:none}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud a{
      padding:8px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#245238; font-size:13px;
    }
    @media (max-width: 980px){
      .hero-inner,.split,.footer-grid,.grid-3,.gallery,.quote-grid,.grid-2{grid-template-columns:1fr}
      .nav{align-items:flex-start}
      .navlinks{display:none; width:100%; justify-content:flex-start}
      .navlinks.open{display:flex}
      .menu-toggle{display:inline-flex}
      .nav{flex-wrap:wrap}
      .hero{padding-top:18px}
    }
    @media (max-width: 680px){
      .container{width:min(var(--container), calc(100% - 20px))}
      .hero-inner{padding:22px}
      .card,.footer-box,.step,.quote,.article{padding:16px}
      .form-grid{grid-template-columns:1fr}
      .stats{grid-template-columns:1fr 1fr}
      .section-title{flex-direction:column; align-items:flex-start}
      .nav-cta{width:100%; justify-content:space-between}
      .btn{padding:11px 14px}
      .mobile-only{display:inline-flex}
    }