:root{
      --bg:#f4fbf6;
      --bg2:#ecf7f0;
      --card:#ffffff;
      --line:#d9e8de;
      --text:#183028;
      --muted:#5b7268;
      --brand:#2f9d63;
      --brand2:#63c28a;
      --accent:#e2f4e9;
      --shadow:0 12px 30px rgba(28,68,48,.08);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#f9fffb 0,#eef9f2 28%,#f4fbf6 60%,#f7fbf8 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px,var(--container));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:40;background:rgba(244,251,246,.84);backdrop-filter:blur(14px);border-bottom:1px solid rgba(217,232,222,.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:40px;height:40px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 8px 18px rgba(47,157,99,.08)}
    .brand h1{font-size:15px;line-height:1.2;margin:0;font-weight:800}
    .brand p{margin:2px 0 0;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;align-items:center;justify-content:flex-end;gap:10px}
    .nav-links a{font-size:13px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{color:var(--brand);background:var(--accent)}
    .nav-cta{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:.22s;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 24px rgba(47,157,99,.18)}
    .btn-ghost{background:#fff;border:1px solid var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(47,157,99,.15)}
    .menu-toggle{display:none}
    .hero{padding:34px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.panel,.review-card,.faq-item,.article-card,.price-card,.metric,.step,.compare,.form-card,.info-card{background:var(--card);border:1px solid rgba(217,232,222,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;background:rgba(99,194,138,.16);filter:blur(10px)}
    .hero-main:before{width:240px;height:240px;right:-90px;top:-90px}
    .hero-main:after{width:180px;height:180px;left:-70px;bottom:-80px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:var(--brand);border:1px solid #cae7d6;padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h2,h3,h4,p{margin:0}
    .hero h2{font-size:clamp(30px,5vw,52px);line-height:1.08;margin-top:16px;letter-spacing:-.03em}
    .hero .summary{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.8;max-width:44em}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{padding:14px 15px;border-radius:16px;background:linear-gradient(180deg,#fff,#f7fcf8);border:1px solid #e2eee6}
    .point strong{display:block;font-size:14px}
    .point span{display:block;color:var(--muted);font-size:12px;margin-top:5px;line-height:1.55}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .side-badge{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px;border-radius:16px;background:linear-gradient(135deg,#effaf3,#f7fdf9);border:1px solid #d8eadf}
    .mini-stat{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{padding:16px}
    .metric .num{font-size:26px;font-weight:900;color:var(--brand)}
    .metric .txt{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.55}
    .section{padding:14px 0 6px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px}
    .section-head h3{font-size:26px;line-height:1.2}
    .section-head p{color:var(--muted);font-size:14px;max-width:58ch;line-height:1.7}
    .section-card{padding:24px}
    .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;border-radius:18px;border:1px solid #e2eee6;background:linear-gradient(180deg,#fff,#f9fcfa)}
    .card h4{font-size:17px;margin-bottom:10px}
    .card p,.card li{color:var(--muted);font-size:14px;line-height:1.72}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid #d9e8de;color:#355347;font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
    .step{padding:18px}
    .step .index{display:inline-flex;width:32px;height:32px;border-radius:999px;align-items:center;justify-content:center;background:var(--accent);color:var(--brand);font-weight:800;margin-bottom:10px}
    .step h4{font-size:16px;margin-bottom:8px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid #dfeae3}
    table{width:100%;border-collapse:collapse;min-width:860px;background:#fff}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #edf3ef;font-size:14px;vertical-align:top}
    th{background:#f4fbf6;color:#274438;font-size:13px}
    .rating{display:flex;align-items:center;gap:8px;color:#e3a008;font-weight:800}
    .compare-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .review-grid,.article-grid,.faq-grid,.contact-grid,.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-card{padding:18px}
    .review-card .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
    .avatar{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,#dff3e7,#f4fbf6);display:flex;align-items:center;justify-content:center;color:var(--brand);font-weight:900}
    .review-card p{color:var(--muted);line-height:1.75;font-size:14px}
    .review-card .role{margin-top:12px;color:var(--text);font-weight:700;font-size:13px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;padding:18px;border:0;color:var(--text);font-size:15px;font-weight:800;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-a p{color:var(--muted);line-height:1.75;font-size:14px}
    .form-card{padding:22px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:block;font-size:13px;font-weight:700;margin-bottom:8px;color:#2b463a}
    input,select,textarea{width:100%;border:1px solid #d7e6dc;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,157,99,.12)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{margin-top:18px;padding:22px 0 28px;background:#eff8f2;border-top:1px solid #dbe8df;color:#294338}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer a{color:#1f6c43}
    .floating{position:fixed;right:18px;bottom:18px;z-index:45;display:flex;flex-direction:column;gap:10px}
    .floating a,.floating button{border:0;border-radius:999px;padding:12px 15px;background:#fff;color:var(--text);box-shadow:var(--shadow);border:1px solid #dce9df;font-weight:800;cursor:pointer}
    .backtop{display:none}
    .fade-up{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .fade-up.in{opacity:1;transform:none}
    .gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .gallery .card img{border-radius:14px;border:1px solid #e2eee6;background:#fff}
    .article-card h4{margin-bottom:10px}
    .article-card a{display:inline-flex;margin-top:12px;color:var(--brand);font-weight:700}
    .line-list{display:grid;gap:12px}
    .line-item{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px dashed #e1ece4}
    .line-item:last-child{border-bottom:0;padding-bottom:0}
    .line-dot{width:10px;height:10px;border-radius:50%;background:var(--brand);margin-top:7px;flex:0 0 auto}
    .two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .mobile-only{display:none}
    @media (max-width: 1024px){
      .hero-grid,.compare-grid,.footer-grid,.grid-4,.workflow,.grid-3,.review-grid,.article-grid,.faq-grid,.contact-grid,.price-grid,.gallery,.two-col{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 860px){
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:68px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .menu-toggle{display:inline-flex}
      .nav{position:relative}
      .hero-grid,.compare-grid,.footer-grid,.grid-4,.workflow,.grid-3,.review-grid,.article-grid,.faq-grid,.contact-grid,.price-grid,.gallery,.two-col,.hero-points,.mini-stat,.form-grid{grid-template-columns:1fr}
      .section-head,.nav{align-items:flex-start;flex-direction:column}
      .nav-cta{width:100%;justify-content:space-between}
      .hero-main{padding:24px}
      .hero h2{font-size:32px}
      .section-head h3{font-size:22px}
    }