:root{
      --bg:#f6faf6;
      --panel:#ffffff;
      --panel-2:#eefaf0;
      --text:#1f2a24;
      --muted:#5e6b63;
      --line:#d9e7dc;
      --brand:#13d36d;
      --brand-2:#0d9d53;
      --brand-3:#bdf8cf;
      --accent:#ffcc4d;
      --shadow:0 18px 40px rgba(18,71,42,.10);
      --radius:22px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#ffffff 0,#f4fff6 34%,#eef8ef 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    header,main,footer{position:relative}
    .topbar{position:sticky;top:0;z-index:40;background:rgba(246,250,246,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(217,231,220,.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:4px;box-shadow:0 8px 18px rgba(0,0,0,.06)}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px}
    .menu{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px;align-items:center}
    .menu a{font-size:14px;color:var(--text);padding:9px 12px;border-radius:999px;transition:.25s}
    .menu a:hover,.menu a.active{background:var(--brand);color:#063018;box-shadow:0 10px 24px rgba(19,211,109,.18)}
    .nav-actions{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:.25s;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#6bf0a5);color:#05301a;box-shadow:0 16px 32px rgba(19,211,109,.22)}
    .btn-secondary{background:#fff;color:var(--text);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .mobile-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:14px}
    .hero{padding:44px 0 18px}
    .hero-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-card,.glass{background:linear-gradient(180deg,rgba(255,255,255,.94),rgba(238,250,239,.92));border:1px solid rgba(217,231,220,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-card{padding:30px;overflow:hidden;position:relative}
    .hero-card:before,.hero-card:after{content:"";position:absolute;border-radius:999px;background:rgba(19,211,109,.10)}
    .hero-card:before{width:240px;height:240px;right:-80px;top:-90px}
    .hero-card:after{width:180px;height:180px;right:40px;bottom:-80px;background:rgba(255,204,77,.16)}
    .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
    .tag{font-size:13px;color:#08411f;background:#e9fbef;border:1px solid #ccefd7;padding:8px 12px;border-radius:999px}
    h1{margin:0;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:16px 0 22px;font-size:16px;line-height:1.8;color:var(--muted);max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px}
    .mini-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .metric{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 14px}
    .metric strong{display:block;font-size:22px;color:#08331a}
    .metric span{display:block;margin-top:6px;font-size:12px;color:var(--muted);line-height:1.5}
    .hero-side{display:grid;gap:14px}
    .side-box{padding:22px}
    .side-box h3{margin:0 0 10px;font-size:20px}
    .side-box ul{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .side-box li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.6}
    .dot{width:10px;height:10px;border-radius:50%;background:var(--brand);margin-top:7px;flex:none;box-shadow:0 0 0 6px rgba(19,211,109,.12)}
    section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .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(--panel);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 12px 28px rgba(23,68,39,.06);transition:.25s}
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 36px rgba(23,68,39,.10)}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#dffbe9,#bdf8cf);color:#0d6a3a;font-weight:900;margin-bottom:14px}
    .flow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative;padding:20px 18px 18px;background:linear-gradient(180deg,#fff,#f3fbf5);border:1px solid var(--line);border-radius:20px}
    .step strong{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:var(--brand);color:#05301a;margin-bottom:14px}
    .step h3{font-size:18px}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:16px 14px;border-bottom:1px solid #e6efe8;text-align:left;vertical-align:top}
    th{background:#eefaf0;color:#0d4024;font-size:14px}
    td{color:var(--text);line-height:1.7}
    .rating{font-weight:800;color:#0b6f3f}
    .badge{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;background:#eefaf0;color:#0c5d33;font-size:12px;border:1px solid #ccefd7}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#284033;font-size:13px}
    .showcase{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .showcase .card{min-height:100%}
    .article-list{display:grid;gap:12px}
    .article{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:16px 18px;border-radius:18px;border:1px solid var(--line);background:#fff}
    .article strong{display:block;margin-bottom:6px}
    .article span{color:var(--muted);font-size:13px}
    .article a{color:var(--brand-2);font-weight:700}
    .comments{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .comment{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .comment .name{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}
    .stars{color:#f2b01e;letter-spacing:2px}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px}
    .faq{display:grid;gap:12px}
    summary{cursor:pointer;font-weight:700;color:#163624}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"＋";float:right;color:var(--brand-2)}
    details[open] summary:after{content:"－"}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:#203529}
    input,select,textarea{width:100%;border:1px solid #cfe0d3;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{padding:22px 0 28px;border-top:1px solid var(--line);background:#f7fbf7;color:var(--text)}
    .footer a{color:#0d6a3a}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:18px}
    .qr{width:132px;border-radius:14px;border:1px solid var(--line);overflow:hidden;background:#fff}
    .float-actions{position:fixed;right:16px;bottom:16px;z-index:55;display:grid;gap:10px}
    .float-actions a,.to-top{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);font-size:12px;color:#11341f}
    .to-top{cursor:pointer}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}
    .subtle{color:var(--muted)}
    .split-line{height:1px;background:linear-gradient(90deg,transparent,#cfe0d3,transparent);margin:18px 0}
    .compare-mini{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .compare-pill{padding:16px;border-radius:18px;background:linear-gradient(135deg,#fff,#edf9ef);border:1px solid var(--line)}
    .nav-toggle{display:none}
    @media (max-width: 980px){
      .hero-wrap,.grid-3,.grid-2,.showcase,.comments,.footer-grid,.flow,.mini-metrics{grid-template-columns:1fr 1fr}
      .hero-wrap,.showcase,.footer-grid{display:grid}
      .flow{grid-template-columns:1fr 1fr}
      .hero-card{padding:24px}
      .menu{display:none}
      .mobile-toggle{display:inline-grid;place-items:center}
      .menu.open{display:flex;position:absolute;left:16px;right:16px;top:70px;background:#fff;padding:12px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav{position:relative}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max),calc(100% - 24px))}
      .hero-wrap,.grid-3,.grid-2,.showcase,.comments,.footer-grid,.flow,.mini-metrics,.compare-mini,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      h1{font-size:30px}
      .hero-card,.card,.step{padding:18px}
      .nav-actions .btn-secondary{display:none}
      .article{flex-direction:column;align-items:flex-start}
    }