:root{
      --mint-50:#f4fcf5;
      --mint-100:#e4f7e8;
      --mint-200:#c9efd2;
      --mint-500:#3aa66c;
      --mint-700:#19724b;
      --ink:#18332b;
      --muted:#5e726a;
      --line:#d7e8dc;
      --white:#ffffff;
      --coral:#e77b5f;
      --gold:#d49b35;
      --shadow:0 16px 40px rgba(33,91,62,.10);
      --radius:12px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--mint-50);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:20;
      background:rgba(244,252,245,.94);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(14px);
    }
    .nav-bar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:26px}
    .brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
    .ai-page-logo{width:42px;max-width:100%;height:auto}
    .brand-name{font-size:19px;font-weight:800;letter-spacing:0}
    .brand-sub{display:block;color:var(--muted);font-size:11px;line-height:1.2}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{padding:8px 9px;color:#355348;font-size:13px;white-space:nowrap;border-radius:7px}
    .nav-links a:hover{background:var(--mint-100);color:var(--mint-700)}
    .nav-cta,.button-primary{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      background:var(--mint-700);color:#fff;border:1px solid var(--mint-700);
      padding:11px 18px;border-radius:7px;font-weight:700;transition:.25s ease;
    }
    .nav-cta:hover,.button-primary:hover{background:#105b3b;transform:translateY(-2px);box-shadow:0 8px 18px rgba(25,114,75,.2)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);padding:9px 11px;border-radius:7px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#edf9ef 0%,#fbfff9 54%,#dff4e7 100%);border-bottom:1px solid var(--line)}
    .hero:after{content:"";position:absolute;right:-100px;top:32px;width:360px;height:360px;border:1px solid rgba(58,166,108,.16);border-radius:50%;box-shadow:0 0 0 28px rgba(58,166,108,.05),0 0 0 58px rgba(58,166,108,.035)}
    .hero-inner{position:relative;z-index:1;min-height:580px;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:60px;padding:76px 0 70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--mint-700);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:22px;height:3px;background:var(--coral);border-radius:3px}
    h1,h2,h3{line-height:1.25;margin:0 0 18px;letter-spacing:0}
    h1{font-size:clamp(38px,5vw,66px);max-width:680px}
    h2{font-size:clamp(27px,3vw,40px)}
    h3{font-size:20px}
    .hero-copy{font-size:18px;color:#49665a;max-width:620px;margin:0 0 28px}
    .button-row{display:flex;gap:12px;flex-wrap:wrap}
    .button-secondary{display:inline-flex;align-items:center;justify-content:center;border:1px solid #9acbaa;color:var(--mint-700);padding:10px 17px;border-radius:7px;font-weight:700;background:rgba(255,255,255,.65);transition:.25s ease}
    .button-secondary:hover{background:#fff;border-color:var(--mint-500);transform:translateY(-2px)}
    .hero-panel{position:relative;padding:28px;background:rgba(255,255,255,.78);border:1px solid #c6e7ce;border-radius:18px;box-shadow:var(--shadow);animation:rise .7s ease both}
    .hero-panel:before{content:"";position:absolute;left:22px;top:-8px;width:42px;height:4px;background:var(--coral);border-radius:4px}
    .hero-panel h3{font-size:22px}
    .hero-panel p{color:var(--muted);margin:0 0 20px}
    .signal-list{display:grid;gap:12px}
    .signal{display:flex;align-items:center;gap:12px;padding:12px 13px;background:#fff;border:1px solid var(--line);border-radius:9px}
    .signal-mark{width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:var(--mint-100);color:var(--mint-700);font-weight:800}
    .signal strong{display:block;font-size:15px}
    .signal span{display:block;color:var(--muted);font-size:12px}
    .section{padding:88px 0}
    .section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:36px}
    .section-heading p{max-width:580px;color:var(--muted);margin:0}
    .kicker{color:var(--coral);font-weight:800;font-size:13px;margin-bottom:10px}
    .intro-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:start}
    .lead-text{font-size:19px;color:#36574a}
    .about-points{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .point{padding:20px;background:#f7fcf8;border-left:3px solid var(--mint-500);border-radius:0 9px 9px 0}
    .point strong{display:block;margin-bottom:5px}
    .point span{font-size:14px;color:var(--muted)}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:34px}
    .metric{padding:22px 18px;border-top:3px solid var(--mint-500);background:#fff;border-radius:8px;box-shadow:0 8px 22px rgba(33,91,62,.06)}
    .metric strong{display:block;color:var(--mint-700);font-size:30px;line-height:1.1}
    .metric span{font-size:13px;color:var(--muted)}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{padding:23px 20px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.25s ease}
    .service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#a8d9b5}
    .service-icon{width:38px;height:38px;display:grid;place-items:center;background:var(--mint-100);color:var(--mint-700);border-radius:9px;font-weight:800;margin-bottom:16px}
    .service-card h3{font-size:18px;margin-bottom:8px}
    .service-card p{font-size:14px;color:var(--muted);margin:0}
    .wide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature-block{padding:26px;background:#f8fdf9;border:1px solid var(--line);border-radius:10px}
    .feature-block h3{font-size:19px}
    .feature-block p{color:var(--muted);margin:0}
    .feature-block ul{padding-left:19px;margin:15px 0 0;color:#49665a;font-size:14px}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line)}
    .step{position:relative;padding:27px 19px 8px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-number{font-size:13px;color:var(--coral);font-weight:800;margin-bottom:15px}
    .step p{color:var(--muted);font-size:14px;margin:0}
    .solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .solution{padding:22px;background:#fff;border:1px solid var(--line);border-radius:10px}
    .solution strong{display:block;margin-bottom:7px}
    .solution span{font-size:14px;color:var(--muted)}
    .network{display:flex;flex-wrap:wrap;gap:9px;padding:25px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .tag{padding:8px 13px;border:1px solid #b9dec2;border-radius:20px;color:#36604d;background:#f5fcf6;font-size:13px}
    .tag:nth-child(3n){border-color:#f0c2b4;background:#fff8f5;color:#9c553e}
    .comparison-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:#fff}
    table{width:100%;min-width:760px;border-collapse:collapse}
    th,td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#eaf8ed;color:var(--mint-700);font-size:14px}
    td{font-size:14px;color:#4d665b}
    tr:last-child td{border-bottom:0}
    .score-panel{display:flex;align-items:center;gap:25px;padding:25px;background:#effaf1;border:1px solid #b9e2c2;border-radius:10px;margin-bottom:22px}
    .score{font-size:42px;line-height:1;color:var(--mint-700);font-weight:800}
    .stars{color:var(--gold);font-size:21px;letter-spacing:2px}
    .score-panel p{margin:3px 0 0;color:var(--muted)}
    .cases{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .case{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:10px}
    .case-media{aspect-ratio:16/9;background:#eaf7ed;overflow:hidden}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-copy{padding:19px}
    .case-copy p{color:var(--muted);font-size:14px;margin:0}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:23px;background:#fff;border:1px solid var(--line);border-radius:10px}
    .review p{margin:0 0 18px;color:#435e51;font-size:15px}
    .review footer{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:13px}
    .review b{color:var(--ink)}
    .article-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .article{padding:17px;background:#fff;border:1px solid var(--line);border-radius:8px;transition:.2s}
    .article:hover{border-color:var(--mint-500);transform:translateY(-3px)}
    .article small{color:var(--coral);font-weight:700}
    .article strong{display:block;margin-top:8px;font-size:14px}
    .faq-list{display:grid;gap:10px;max-width:900px}
    details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:0 19px}
    summary{cursor:pointer;list-style:none;padding:17px 0;font-weight:700;display:flex;justify-content:space-between;gap:15px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--mint-700);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{margin:0 0 17px;color:var(--muted);font-size:14px}
    .form-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:38px;align-items:start}
    .contact-list{display:grid;gap:13px;margin-top:24px}
    .contact-item{display:flex;gap:12px;align-items:flex-start}
    .contact-item b{display:block}
    .contact-item span{color:var(--muted);font-size:14px}
    .form-box{background:#fff;border:1px solid var(--line);padding:25px;border-radius:12px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}
    .field{display:grid;gap:6px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid #c9ddd0;border-radius:6px;padding:11px 12px;color:var(--ink);background:#fbfefb;outline:none}
    input:focus,select:focus,textarea:focus{border-color:var(--mint-500);box-shadow:0 0 0 3px rgba(58,166,108,.12)}
    textarea{min-height:126px;resize:vertical}
    .form-note{color:var(--muted);font-size:12px;margin:14px 0 0}
    .footer{background:#1d4033;color:#dceee2;padding:52px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr 1fr;gap:35px}
    .footer h3{color:#fff;font-size:17px;margin-bottom:12px}
    .footer p,.footer a{color:#b9d4c2;font-size:14px}
    .footer a:hover{color:#fff}
    .footer-links{display:grid;gap:6px}
    .qr{width:112px;border-radius:6px;background:#fff;padding:5px}
    .copyright{border-top:1px solid rgba(220,238,226,.18);margin-top:35px;padding-top:18px;color:#a9c5b3;font-size:12px;display:flex;justify-content:space-between;gap:15px}
    .float-tools{position:fixed;right:18px;bottom:22px;z-index:12;display:grid;gap:9px}
    .float-tools a{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--mint-700);color:#fff;box-shadow:0 7px 18px rgba(25,114,75,.25);font-weight:800;font-size:13px}
    .float-tools a:hover{background:var(--coral)}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
    .reveal.visible{opacity:1;transform:none}
    @keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
    @media (max-width:1080px){
      .nav-links a{padding-left:6px;padding-right:6px;font-size:12px}
      .nav-cta{padding:9px 12px;font-size:13px}
      .service-grid{grid-template-columns:repeat(3,1fr)}
      .article-grid{grid-template-columns:repeat(3,1fr)}
    }
    @media (max-width:820px){
      .container{width:min(var(--container),calc(100% - 28px))}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:70px;padding:10px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:9px;align-items:stretch}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{text-align:center;padding:10px}
      .nav-cta{display:none}
      .hero-inner,.intro-grid,.form-layout{grid-template-columns:1fr;gap:30px}
      .hero-inner{padding:58px 0}
      .hero-panel{max-width:600px}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .service-grid,.solution-grid{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(2,1fr);border-top:0}
      .step{border-top:1px solid var(--line);border-right:0}
      .step:nth-child(odd){border-right:1px solid var(--line)}
      .cases{grid-template-columns:1fr 1fr}
      .cases .case:first-child{grid-column:1/-1}
      .reviews{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:560px){
      h1{font-size:39px}
      .section{padding:60px 0}
      .section-heading{display:block}
      .section-heading p{margin-top:13px}
      .about-points,.metric-grid,.service-grid,.solution-grid,.cases,.reviews,.article-grid,.form-grid{grid-template-columns:1fr}
      .cases .case:first-child{grid-column:auto}
      .steps{grid-template-columns:1fr}
      .step,.step:nth-child(odd){border-right:0}
      .score-panel{align-items:flex-start;flex-direction:column;gap:10px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:7px}
      .float-tools{right:12px;bottom:14px}
    }