:root{
      --bg:#f4f8f2;
      --panel:#ffffff;
      --panel-2:#f7fbf5;
      --text:#17311f;
      --muted:#5f6f63;
      --line:#dbe8d8;
      --brand:#24c35a;
      --brand-2:#0ea44b;
      --brand-3:#d8ffe6;
      --shadow:0 14px 40px rgba(24, 64, 35, .08);
      --radius:20px;
      --radius-sm:14px;
      --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(36,195,90,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(14,164,75,.08), transparent 24%),
        linear-gradient(180deg, #f7fcf7 0%, #f4f8f2 26%, #f8fbf7 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--max);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(1.2) blur(12px);
      background:rgba(247,251,247,.88);
      border-bottom:1px solid rgba(219,232,216,.8);
    }
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:76px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;border-radius:12px;object-fit:contain;background:#fff;padding:4px;border:1px solid var(--line);box-shadow:0 8px 20px rgba(0,0,0,.04)}
    .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)}
    .nav{
      display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav a{font-size:14px;color:#355143;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav a:hover{background:var(--brand-3);color:#114423}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;padding:12px 18px;
      font-weight:700;cursor:pointer;transition:.22s ease;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);color:#fff;box-shadow:0 12px 28px rgba(36,195,90,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(36,195,90,.28)}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .btn-ghost:hover{border-color:#bcd8bc;transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;width:44px;height:44px;align-items:center;justify-content:center}
    .menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{content:"";display:block;width:18px;height:2px;background:#284433;border-radius:2px;position:relative}
    .menu-toggle span::before{position:absolute;top:-6px}
    .menu-toggle span::after{position:absolute;top:6px}
    main{overflow:hidden}
    .hero{padding:34px 0 26px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-side,.card,.panel,.faq-item,.review,.article,.form-card,.case-card,.timeline li,.compare{
      background:rgba(255,255,255,.88);border:1px solid rgba(219,232,216,.9);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy::after{
      content:"";position:absolute;inset:auto -10% -30% auto;width:280px;height:280px;border-radius:50%;
      background:radial-gradient(circle, rgba(36,195,90,.15), transparent 64%);pointer-events:none
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#ecfff2;color:#12723a;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{font-size:17px;color:var(--muted);max-width:58ch;margin:0 0 22px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .mini{
      background:linear-gradient(180deg,#f8fdf8 0%,#effaf1 100%);
      border:1px solid #d6ebd8;border-radius:16px;padding:14px
    }
    .mini strong{display:block;font-size:18px;color:#0f6d36}
    .mini span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .hero-side .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fbfffb 0,#f2fbf3 100%);border:1px solid #d7ead9}
    .stat b{display:block;font-size:22px;color:#0e6a35}
    .stat small{color:var(--muted)}
    .side-note{padding:16px;border-radius:18px;background:linear-gradient(135deg,#eaffeF 0%,#f7fff8 100%);border:1px solid #cce8d1}
    .section{padding:16px 0 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin:0 0 16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:66ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:18px}
    .card h3,.card h4,.panel h3,.review h3,.article h3,.case-card h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.review p,.article p,.case-card p{margin:0;color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#f2fbf3;border:1px solid #d4ead6;color:#355243;font-size:13px}
    .section-bg{margin-top:18px;padding:28px 0;border-top:1px solid rgba(219,232,216,.8)}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
    .steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step::before{
      counter-increment:step;content:counter(step,decimal-leading-zero);
      display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:14px;
      background:linear-gradient(135deg,#dfffea,#f4fff6);color:#10823e;font-weight:800;margin-bottom:12px
    }
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid #dce9dc;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid #e7efe7;text-align:left;vertical-align:top}
    th{background:#f5fbf6;color:#213c2b;font-size:14px}
    td{color:#3b4f42}
    .check{color:#0d8c43;font-weight:800}
    .cross{color:#9bb0a0}
    .compare{padding:18px}
    .score{
      display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
      padding:16px;border-radius:18px;background:linear-gradient(135deg,#effff2 0%,#ffffff 100%);border:1px solid #cfe8d3;margin-bottom:14px
    }
    .score .stars{color:#0ea44b;font-size:20px;letter-spacing:2px}
    .review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review{padding:18px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .badge{font-size:12px;color:#0e6f38;background:#edfdf0;border:1px solid #d8efdb;padding:5px 10px;border-radius:999px}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article{padding:18px}
    .article .time{font-size:12px;color:#6a7b70;margin-bottom:8px}
    .case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .case-card{padding:18px}
    .case-card ul,.panel ul,.card ul{margin:12px 0 0;padding-left:18px;color:var(--muted)}
    .faq{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px;text-align:left;font:inherit;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:14px;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.active .arrow{transform:rotate(180deg)}
    .arrow{transition:.2s}
    .form-card{padding:20px}
    form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));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%;padding:13px 14px;border-radius:14px;border:1px solid #d8e4d8;background:#fff;font:inherit;color:var(--text);outline:none;transition:.2s
    }
    input:focus,select:focus,textarea:focus{border-color:#8ed59c;box-shadow:0 0 0 4px rgba(36,195,90,.12)}
    textarea{min-height:120px;resize:vertical}
    .form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}
    .note{font-size:13px;color:var(--muted)}
    .timeline{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .timeline li{padding:18px}
    .footer{
      margin-top:24px;padding:26px 0 20px;background:#eef7ef;border-top:1px solid #d8e5d8;color:#203626
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:20px}
    .footer a{color:#114e2d}
    .footer small{color:#526457}
    .contact-list{display:grid;gap:10px}
    .contact-line{display:flex;gap:10px;align-items:flex-start;color:#314637}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:80;display:grid;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:16px;border:1px solid #cfe0d0;background:#fff;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;cursor:pointer
    }
    .backtop{display:none}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.split,.review-grid,.article-list,.case-grid,.faq,.footer-grid,.steps,.timeline{grid-template-columns:1fr 1fr}
      .steps,.timeline{overflow:auto;grid-auto-flow:column;grid-template-columns:repeat(4,minmax(240px,1fr))}
      .hero-grid{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .nav{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open{display:flex;position:absolute;left:20px;right:20px;top:76px;flex-direction:column;align-items:flex-start;gap:8px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
      .nav.open a{width:100%}
      .nav-wrap{position:relative}
      .hero{padding-top:20px}
      .hero-copy,.hero-side,.card,.panel,.faq-item,.review,.article,.form-card,.case-card,.timeline li,.compare{border-radius:18px}
      .hero-copy{padding:24px}
      .hero-points,.hero-side .stat-grid,.grid-3,.grid-4,.split,.review-grid,.article-list,.case-grid,.faq,.footer-grid,form{grid-template-columns:1fr}
      .hero-actions,.form-actions{align-items:stretch}
      .btn{width:100%}
      .desktop-only{display:none}
      .mobile-only{display:block}
      .section-head{flex-direction:column;align-items:flex-start}
      .backtop{display:flex}
    }