:root{
      --bg:#f4fbf4;
      --surface:#ffffff;
      --surface-2:#f7fff8;
      --text:#17301f;
      --muted:#5a6e61;
      --line:#dbe9df;
      --brand:#16b95b;
      --brand-2:#2ee06f;
      --brand-3:#0f8e45;
      --accent:#dffbea;
      --warn:#ffe9b8;
      --shadow:0 18px 40px rgba(16, 77, 40, .08);
      --radius:22px;
      --radius-sm:16px;
      --max:1200px;
    }
    *{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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(46,224,111,.16), transparent 24%),
        radial-gradient(circle at top right, rgba(22,185,91,.10), transparent 22%),
        linear-gradient(180deg, #f7fff8 0%, #f3fbf4 100%);
      line-height:1.65;
    }
    a{color:var(--brand-3); text-decoration:none}
    img{display:block; max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(12px);
      background: rgba(247,255,248,.85);
      border-bottom:1px solid rgba(219,233,223,.9);
    }
    .header-inner{
      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:42px; height:42px; object-fit:contain; border-radius:10px; background:#fff; box-shadow:0 8px 18px rgba(22,185,91,.12)}
    .brand-name{font-weight:800; font-size:1.05rem; letter-spacing:.2px}
    .brand-sub{font-size:.86rem; color:var(--muted)}
    .nav{
      display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end
    }
    .nav a{
      font-size:.92rem; color:var(--text); padding:8px 10px; border-radius:999px;
    }
    .nav a:hover{background:var(--accent)}
    .nav-cta, .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:none; cursor:pointer; border-radius:999px; padding:12px 18px;
      font-weight:700; transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta, .btn-primary{
      background:linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
      color:#fff; box-shadow:0 12px 24px rgba(22,185,91,.22);
    }
    .btn-secondary{
      background:#fff; color:var(--text); border:1px solid var(--line);
    }
    .nav-cta:hover, .btn:hover{transform:translateY(-1px)}
    .menu-toggle{
      display:none; background:#fff; border:1px solid var(--line); border-radius:12px; padding:10px 12px;
    }
    .hero{
      padding:30px 0 22px;
      position:relative;
      overflow:hidden;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.18fr .82fr; gap:22px; align-items:stretch;
    }
    .hero-card{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,255,248,.98));
      border:1px solid rgba(219,233,223,.85);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:28px;
      position:relative;
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px;
      background:var(--accent); color:var(--brand-3);
      padding:8px 12px; border-radius:999px; font-size:.88rem; font-weight:700;
    }
    h1{margin:16px 0 12px; font-size:clamp(2rem, 5vw, 3.55rem); line-height:1.1}
    .lead{font-size:1.05rem; color:var(--muted); max-width:58ch; margin:0 0 18px}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin:18px 0 22px}
    .hero-points{
      display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:20px
    }
    .point{
      background:rgba(255,255,255,.78); border:1px solid var(--line);
      border-radius:18px; padding:14px;
    }
    .point strong{display:block; font-size:1.18rem; margin-bottom:4px}
    .point span{color:var(--muted); font-size:.92rem}
    .hero-aside{
      display:grid; gap:14px;
    }
    .mini-panel{
      background:linear-gradient(180deg, #ffffff, #f6fff7);
      border:1px solid var(--line);
      border-radius:24px;
      padding:20px;
      box-shadow:var(--shadow);
    }
    .mini-panel h3{margin:0 0 10px; font-size:1.05rem}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag{background:#fff; border:1px solid var(--line); border-radius:999px; padding:8px 11px; font-size:.9rem}
    .section{padding:18px 0}
    .section h2{margin:0 0 10px; font-size:clamp(1.45rem, 2.7vw, 2.2rem)}
    .section-desc{margin:0 0 18px; color:var(--muted); max-width:72ch}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .card{
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:24px;
      padding:20px;
      box-shadow:0 10px 28px rgba(18,72,37,.06);
      transition:transform .2s ease, box-shadow .2s ease;
    }
    .card:hover{transform:translateY(-3px); box-shadow:0 16px 34px rgba(18,72,37,.1)}
    .metric h3,.card h3{margin:0 0 8px}
    .metric .num{font-size:1.8rem; font-weight:800; color:var(--brand-3)}
    .muted{color:var(--muted)}
    .pill-row{display:flex; flex-wrap:wrap; gap:8px}
    .pill{background:var(--surface-2); border:1px solid var(--line); padding:8px 10px; border-radius:999px; font-size:.88rem}
    .service-list{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .service-item{display:flex; gap:12px; align-items:flex-start}
    .icon{
      width:38px; height:38px; border-radius:12px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(22,185,91,.12), rgba(46,224,111,.2));
      color:var(--brand-3); font-weight:900; flex:0 0 auto;
    }
    .compare-wrap{overflow:auto; border:1px solid var(--line); border-radius:24px; background:#fff}
    table{width:100%; border-collapse:collapse; min-width:760px}
    th,td{padding:14px 16px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#f2fbf4; color:var(--text)}
    tr:last-child td{border-bottom:none}
    .steps{counter-reset:step}
    .step{
      position:relative; padding-left:54px
    }
    .step:before{
      counter-increment:step;
      content:counter(step);
      position:absolute; left:0; top:0;
      width:38px; height:38px; border-radius:50%;
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      color:#fff; display:grid; place-items:center; font-weight:800;
      box-shadow:0 10px 18px rgba(22,185,91,.2);
    }
    .review{
      display:flex; flex-direction:column; gap:10px;
    }
    .review .stars{color:#f6b400; letter-spacing:1px}
    .timeline{display:grid; gap:12px}
    .timeline-item{
      display:grid; grid-template-columns:120px 1fr; gap:14px; align-items:start;
      padding:14px 0; border-bottom:1px dashed var(--line);
    }
    .timeline-item:last-child{border-bottom:none}
    .timeline-item strong{color:var(--brand-3)}
    .faq details{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:0 16px; box-shadow:0 8px 20px rgba(18,72,37,.05)
    }
    .faq summary{
      list-style:none; cursor:pointer; padding:16px 0; font-weight:700;
    }
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:0 0 16px; color:var(--muted)}
    .articles{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .article h3{margin-bottom:8px; font-size:1.02rem}
    .form-grid{
      display:grid; grid-template-columns:1fr 1fr; gap:14px
    }
    .field{display:flex; flex-direction:column; gap:8px}
    label{font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px;
      font:inherit; background:#fff; color:var(--text);
      outline:none;
    }
    textarea{min-height:120px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(22,185,91,.65); box-shadow:0 0 0 4px rgba(22,185,91,.08)}
    .form-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:6px}
    .footer{
      margin-top:14px;
      background:#102616;
      color:#eaf8ef;
      padding:30px 0 24px;
    }
    .footer a{color:#aef4c8}
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .8fr; gap:18px}
    .footer .card{background:rgba(255,255,255,.04); border-color:rgba(255,255,255,.08); box-shadow:none}
    .footer small{color:#b7d3c0}
    .qrcode{width:150px; border-radius:18px; overflow:hidden; background:#fff; padding:10px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px
    }
    .float-btn{
      background:linear-gradient(135deg, var(--brand), var(--brand-2));
      color:#fff; border:none; border-radius:999px; padding:12px 16px; font-weight:700; box-shadow:0 14px 24px rgba(22,185,91,.26)
    }
    .backtop{
      background:#fff; color:var(--text); border:1px solid var(--line)
    }
    .reveal{opacity:0; transform:translateY(14px); transition:opacity .55s ease, transform .55s ease}
    .reveal.in{opacity:1; transform:translateY(0)}
    .mobile-only{display:none}
    .home-link{font-weight:800}
    .image-row{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    .image-row .ai-page-image{border-radius:18px; box-shadow:var(--shadow)}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.articles,.footer-grid{grid-template-columns:1fr 1fr}
      .grid-3{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 768px){
      .menu-toggle{display:inline-flex}
      .nav{display:none; width:100%; padding:10px 0 0}
      .nav.open{display:flex; flex-direction:column; align-items:flex-start}
      .header-inner{flex-wrap:wrap}
      .hero-grid,.grid-4,.grid-3,.grid-2,.service-list,.articles,.footer-grid,.form-grid,.hero-points,.image-row{grid-template-columns:1fr}
      .hero-card,.mini-panel,.card{padding:18px}
      .timeline-item{grid-template-columns:1fr; gap:6px}
      .desktop-only{display:none}
      .mobile-only{display:block}
    }