:root{
      --bg:#f5f7f3;
      --panel:#ffffff;
      --panel-2:#f0f7ef;
      --text:#1f2937;
      --muted:#5c6777;
      --line:#dce5d7;
      --brand:#18c47a;
      --brand-2:#0fa866;
      --brand-3:#dff9ea;
      --accent:#0b7d4f;
      --shadow:0 18px 40px rgba(18, 53, 34, .08);
      --shadow-sm:0 10px 24px rgba(18, 53, 34, .06);
      --radius:22px;
      --radius-sm:16px;
      --container: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, rgba(24,196,122,.10), transparent 30%),
      radial-gradient(circle at 85% 10%, rgba(15,168,102,.08), transparent 26%),
      linear-gradient(180deg, #fbfcfa 0%, #f4f8f3 100%);
      color:var(--text); line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header{position:sticky;top:0;z-index:40;background:rgba(251,252,250,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,229,215,.8)}
    .topbar{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:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:var(--shadow-sm)}
    .brand h1{margin:0;font-size:18px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:#263238;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav a:hover,.nav a:focus-visible{background:var(--brand-3);color:var(--accent)}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:12px;padding:10px 12px}
    .hero{padding:36px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-card{background:linear-gradient(135deg, #0f1f19 0%, #113524 38%, #0c8b57 100%);color:#fff;border-radius:28px;padding:30px;box-shadow:0 24px 50px rgba(15,90,58,.22);position:relative;overflow:hidden}
    .hero-card:before,.hero-card:after{content:"";position:absolute;border-radius:50%;filter:blur(10px);opacity:.35}
    .hero-card:before{width:180px;height:180px;background:#4cffae;right:-40px;top:-20px}
    .hero-card:after{width:220px;height:220px;background:#b6ffd9;right:70px;bottom:-120px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);padding:8px 12px;border-radius:999px;font-size:13px}
    .hero h2{margin:16px 0 14px;font-size:clamp(30px, 5vw, 56px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:rgba(255,255,255,.88);font-size:16px;max-width:42em}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:14px;padding:12px 18px;font-weight:700;border:1px solid transparent;transition:.22s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg, #c9ffdb 0%, #7ff0b5 100%);color:#0c5134;box-shadow:0 12px 30px rgba(127,240,181,.25)}
    .btn-secondary{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.18)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{display:grid;gap:16px}
    .mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .mini-card,.info-card,.section-card,.review-card,.article-card,.faq-item,.contact-card,.price-card,.step-card,.case-card,.compare-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
    .mini-card{padding:18px}
    .mini-card strong{display:block;font-size:28px;color:var(--accent);line-height:1}
    .mini-card span{display:block;margin-top:8px;color:var(--muted);font-size:13px}
    .hero-cta{background:linear-gradient(180deg, #f8fff9 0%, #eefbf4 100%);padding:20px;border-radius:24px;border:1px solid #d7eadb}
    .hero-cta .home-link{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:#0a6e44;background:#fff;border:1px solid #cfe6d7;padding:11px 14px;border-radius:14px}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px}
    .section-head h3{margin:0;font-size:26px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:56ch}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#284034;font-size:13px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .section-card{padding:20px}
    .section-card h4,.case-card h4,.price-card h4,.compare-card h4,.contact-card h4{margin:0 0 10px;font-size:18px}
    .muted{color:var(--muted)}
    .list{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));margin-top:8px;flex:0 0 auto}
    .steps{counter-reset:s}
    .step-card{padding:20px;position:relative}
    .step-card:before{counter-increment:s;content:counter(s);position:absolute;right:18px;top:16px;font-size:36px;font-weight:800;color:#cfe9d7}
    .step-card h4{margin:0 0 8px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf2ea;text-align:left;vertical-align:top}
    th{background:#f5fbf7;color:#214334;font-size:14px}
    td{color:#344155;font-size:14px}
    .rating{display:inline-flex;gap:4px;color:#18b26f;font-weight:800}
    .faq-item{padding:6px 18px;overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;background:none;border:0;color:var(--text);font:inherit;text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding-bottom:0;color:var(--muted)}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:14px}
    .review-card{padding:20px}
    .review-card .who{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#16b16c;letter-spacing:2px}
    .article-card{padding:18px}
    .article-card a{display:block;color:#124f33;font-weight:700}
    .article-card p{margin:8px 0 0;color:var(--muted)}
    .contact-form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700;color:#203325}
    input,select,textarea{width:100%;border:1px solid #cfe0d0;background:#fff;border-radius:14px;padding:12px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(24,196,122,.12)}
    .footer{padding:22px 0 34px;border-top:1px solid rgba(220,229,215,.9);margin-top:10px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .footer a{color:#0a6e44}
    .floating{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .fab{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 14px 30px rgba(24,196,122,.28)}
    .drawer{display:none}
    .fade-up{opacity:0;transform:translateY(18px);transition:opacity .5s ease, transform .5s ease}
    .fade-up.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.footer-grid{grid-template-columns:1fr}
      .nav{display:none}
      .menu-btn{display:inline-flex}
      .drawer{display:none;padding:0 0 14px}
      .drawer.open{display:grid;gap:8px}
      .contact-form{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
    }