:root{
      --ink:#173b35;
      --muted:#607773;
      --mint:#dff5e9;
      --mint-strong:#55bd8a;
      --green:#16785c;
      --deep:#0d4e42;
      --cream:#fbfdf9;
      --line:#d8e9e1;
      --white:#ffffff;
      --shadow:0 18px 45px rgba(18,82,61,.09);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:20;background:rgba(251,253,249,.94);border-bottom:1px solid rgba(216,233,225,.8);backdrop-filter:blur(14px)}
    .nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;min-width:170px}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand strong{font-size:19px;letter-spacing:0}
    .brand small{display:block;color:var(--muted);font-size:11px;line-height:1.2}
    .nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
    .nav-links a{font-size:13px;color:#47665f;padding:8px 10px;border-radius:8px;transition:.25s}
    .nav-links a:hover{background:var(--mint);color:var(--deep)}
    .nav-cta{background:var(--green)!important;color:#fff!important;padding:10px 16px!important;margin-left:8px}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--deep);border-radius:9px;padding:8px 11px;font-size:20px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#effcf3 0%,#d8f2e7 50%,#f8fcf7 100%);padding:88px 0 72px}
    .hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(22,120,92,.16);border-radius:50%;pointer-events:none}
    .hero:before{width:420px;height:420px;right:-160px;top:-180px}
    .hero:after{width:260px;height:260px;left:-140px;bottom:-160px}
    .hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:56px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:18px}
    .eyebrow:before{content:"";width:26px;height:2px;background:var(--mint-strong)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.12;letter-spacing:0;margin-bottom:22px;max-width:720px}
    .hero-copy{font-size:18px;color:#45635c;max-width:650px;margin-bottom:30px}
    .actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 20px;border-radius:10px;border:1px solid var(--green);font-weight:700;transition:transform .25s,box-shadow .25s,background .25s}
    .btn:hover{transform:translateY(-3px);box-shadow:0 10px 20px rgba(22,120,92,.17)}
    .btn-primary{background:var(--green);color:#fff}
    .btn-secondary{background:#fff;color:var(--green)}
    .hero-panel{background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.95);padding:24px;border-radius:22px;box-shadow:var(--shadow)}
    .panel-label{font-size:13px;color:var(--green);font-weight:700;margin-bottom:12px}
    .flow-line{display:grid;gap:10px}
    .flow-item{display:flex;align-items:center;justify-content:space-between;background:#f8fffb;border:1px solid var(--line);border-radius:12px;padding:13px 15px}
    .flow-item span{font-weight:700}
    .flow-item b{font-size:12px;color:var(--green);font-weight:600}
    section{padding:86px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}
    .section-head h2{font-size:clamp(27px,3.5vw,42px);line-height:1.2;margin-bottom:10px}
    .section-head p{color:var(--muted);max-width:600px;margin-bottom:0}
    .kicker{color:var(--green);font-weight:700;font-size:13px;letter-spacing:1px}
    .stats{margin-top:-1px;background:#fff;border-bottom:1px solid var(--line);padding:22px 0}
    .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
    .stat{background:#fff;padding:20px;text-align:center}
    .stat strong{display:block;color:var(--deep);font-size:28px}
    .stat span{color:var(--muted);font-size:13px}
    .intro{background:#fff}
    .intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
    .intro h2{font-size:38px;line-height:1.25}
    .intro p{color:var(--muted)}
    .feature-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .feature{padding:17px;border-left:3px solid var(--mint-strong);background:#f4fbf6}
    .feature strong{display:block;margin-bottom:3px}
    .feature span{font-size:13px;color:var(--muted)}
    .service-section{background:#eef9f1}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .service-card{background:#fff;border:1px solid var(--line);padding:24px;border-radius:var(--radius);transition:.25s}
    .service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service-card .icon{width:42px;height:42px;border-radius:12px;background:var(--mint);color:var(--deep);display:grid;place-items:center;font-weight:800;margin-bottom:18px}
    .service-card h3{font-size:20px;margin-bottom:8px}
    .service-card p{font-size:14px;color:var(--muted);margin-bottom:14px}
    .tag-row{display:flex;flex-wrap:wrap;gap:7px}
    .tag{font-size:12px;color:var(--green);background:#effaf3;border:1px solid #cfe9d9;padding:4px 9px;border-radius:20px}
    .band{background:var(--deep);color:#fff}
    .band .section-head p,.band .kicker{color:#bcebd3}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid rgba(255,255,255,.28)}
    .step{padding:25px 18px 8px;border-right:1px solid rgba(255,255,255,.2);position:relative}
    .step:last-child{border-right:0}
    .step b{display:block;font-size:30px;color:#9de2bb;margin-bottom:12px}
    .step h3{font-size:17px;margin-bottom:7px}
    .step p{font-size:13px;color:#cce7da;margin:0}
    .industry-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
    .industry-main{background:#fff;padding:30px;border:1px solid var(--line);border-radius:var(--radius)}
    .industry-main h3{font-size:25px}
    .industry-main p{color:var(--muted)}
    .industry-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .industry-list div{padding:16px;background:#f4fbf6;border-radius:12px;font-weight:700}
    .network{background:#f5fbf6}
    .network-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:22px}
    .network-card{background:#fff;border:1px solid var(--line);padding:25px;border-radius:var(--radius)}
    .network-card h3{font-size:23px}
    .model-cloud{display:flex;gap:9px;flex-wrap:wrap}
    .model-cloud span{padding:8px 12px;background:var(--mint);border-radius:8px;color:var(--deep);font-size:13px}
    .timeline{display:grid;gap:12px}
    .timeline div{display:grid;grid-template-columns:90px 1fr;gap:15px;align-items:start;padding-bottom:13px;border-bottom:1px dashed var(--line)}
    .timeline b{color:var(--green)}
    .timeline span{font-size:14px;color:var(--muted)}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .case-media{background:#e4f5e9;padding:10px}
    .case-media img{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:16/8;object-fit:cover;border-radius:10px}
    .case-body{padding:20px}
    .case-body h3{margin-bottom:7px}
    .case-body p{color:var(--muted);font-size:14px;margin-bottom:0}
    .comparison{background:#fff}
    .score-card{display:flex;align-items:center;gap:26px;background:#ecfaf0;border:1px solid #c9e7d4;padding:22px;border-radius:14px;margin-bottom:22px}
    .score{font-size:42px;font-weight:800;color:var(--green);line-height:1}
    .stars{color:#d69425;font-size:22px;letter-spacing:2px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
    table{width:100%;border-collapse:collapse;min-width:720px;background:#fff}
    th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#effaf3;color:var(--deep)}
    tr:last-child td{border-bottom:0}
    td:last-child{color:var(--green);font-weight:700}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .price{padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
    .price h3{margin-bottom:8px}
    .price strong{font-size:26px;color:var(--green)}
    .price p{font-size:13px;color:var(--muted)}
    .price ul{padding-left:18px;color:var(--muted);font-size:14px;margin-bottom:0}
    .reviews{background:#eef9f1}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review{background:#fff;padding:23px;border-radius:var(--radius);border:1px solid var(--line)}
    .review p{color:#45635c;font-size:14px}
    .review footer{font-size:13px;color:var(--green);font-weight:700}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .article span{font-size:12px;color:var(--green)}
    .article h3{font-size:18px;margin:8px 0}
    .article p{color:var(--muted);font-size:13px;margin-bottom:0}
    .faq-contact{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start}
    .faq-list{display:grid;gap:9px}
    details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:0 17px}
    summary{cursor:pointer;padding:16px 0;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:20px}
    summary:after{content:"+";color:var(--green);font-size:20px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;padding:0 0 16px;margin:0}
    .form-card{background:var(--deep);color:#fff;padding:27px;border-radius:var(--radius)}
    .form-card h3{font-size:25px;margin-bottom:8px}
    .form-card p{color:#c6e8d7;font-size:14px}
    form{display:grid;gap:12px}
    input,select,textarea{width:100%;font:inherit;border:1px solid rgba(255,255,255,.28);background:#fff;color:var(--ink);border-radius:8px;padding:11px 12px}
    textarea{min-height:108px;resize:vertical}
    .form-card .btn{background:#a8e8bf;border-color:#a8e8bf;color:var(--deep);cursor:pointer}
    .media-strip{display:grid;grid-template-columns:1fr 1fr .72fr;gap:16px;margin-top:28px}
    .media-strip img{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:16/8;object-fit:cover;border-radius:12px}
    .media-strip img:last-child{aspect-ratio:1/1}
    .cta{padding:66px 0;background:linear-gradient(120deg,#d9f5e4,#effaf2)}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .cta h2{font-size:34px;margin-bottom:8px}
    .cta p{color:var(--muted);margin-bottom:0}
    .footer{background:#103f36;color:#d8f0e2;padding:48px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr 1fr;gap:28px}
    .footer h3{color:#fff;font-size:16px;margin-bottom:13px}
    .footer p,.footer a{font-size:13px;color:#b9d8cb}
    .footer a{display:block;margin:6px 0}
    .footer a:hover{color:#fff}
    .qr{width:118px;height:118px;object-fit:cover;border-radius:8px;background:#fff;padding:5px}
    .copyright{border-top:1px solid rgba(255,255,255,.16);margin-top:32px;padding-top:17px;color:#a8cabe;font-size:12px}
    .float-tools{position:fixed;right:18px;bottom:22px;z-index:15;display:grid;gap:8px}
    .float-tools a{width:45px;height:45px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#fff;box-shadow:0 8px 20px rgba(16,75,55,.2);font-size:12px;text-align:center}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:980px){
      .nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:#fbfdf9;padding:12px 20px 18px;border-bottom:1px solid var(--line)}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{padding:10px}
      .nav-cta{margin-left:0}
      .menu-toggle{display:block}
      .hero-grid,.intro-grid,.industry-grid,.network-layout,.faq-contact{grid-template-columns:1fr}
      .service-grid,.case-grid,.review-grid,.article-grid{grid-template-columns:repeat(2,1fr)}
      .process{grid-template-columns:repeat(3,1fr);gap:12px;border-top:0}
      .step{border:1px solid rgba(255,255,255,.2);border-radius:10px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      section{padding:62px 0}
      .hero{padding:62px 0 55px}
      h1{font-size:39px}
      .hero-copy{font-size:16px}
      .stats-grid{grid-template-columns:repeat(2,1fr)}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .feature-list,.industry-list,.service-grid,.case-grid,.review-grid,.article-grid,.price-grid{grid-template-columns:1fr}
      .process{grid-template-columns:1fr 1fr}
      .media-strip{grid-template-columns:1fr}
      .media-strip img,.media-strip img:last-child{aspect-ratio:16/8}
      .cta-inner{display:block}
      .cta .actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr}
      .float-tools{right:12px;bottom:14px}
    }
    @media(prefers-reduced-motion:reduce){
      *,html{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }