:root{
      --ink:#12313a;
      --muted:#60777d;
      --teal:#0b9b9d;
      --cyan:#31c7c3;
      --mint:#e7f7f4;
      --pale:#f4fbfa;
      --line:#d6e9e7;
      --white:#fff;
      --navy:#123d48;
      --shadow:0 16px 40px rgba(18,61,72,.09);
      --radius:14px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--pale);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    .container{width:min(1160px,calc(100% - 36px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;font-weight:800;color:var(--navy)}
    .ai-page-logo{width:42px}
    .brand-name{font-size:18px;letter-spacing:0}
    .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:13px;color:#47636a;padding:8px 9px;white-space:nowrap}
    .nav-links a:hover{color:var(--teal)}
    .nav-cta{background:var(--teal);color:#fff!important;border-radius:8px;margin-left:8px;padding:9px 14px!important}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--navy);border-radius:8px;padding:8px 11px;font-size:20px}
    .hero{position:relative;overflow:hidden;background:#dff5f1;border-bottom:1px solid var(--line)}
    .hero:before,.hero:after{content:"";position:absolute;border:1px solid rgba(11,155,157,.18);border-radius:50%;pointer-events:none}
    .hero:before{width:360px;height:360px;right:-120px;top:-140px}
    .hero:after{width:230px;height:230px;left:-130px;bottom:-120px}
    .hero-inner{position:relative;z-index:1;padding:94px 0 74px;display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
    .eyebrow,.section-kicker{font-size:12px;font-weight:800;letter-spacing:2px;color:var(--teal);text-transform:uppercase}
    h1,h2,h3{margin:0 0 16px;line-height:1.2;color:var(--navy)}
    h1{font-size:clamp(38px,6vw,68px);max-width:680px;letter-spacing:0}
    h2{font-size:clamp(28px,4vw,42px)}
    h3{font-size:20px}
    .hero-copy{font-size:18px;color:#456168;max-width:650px;margin:0 0 28px}
    .actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--teal);border-radius:8px;padding:12px 20px;font-weight:700;transition:.25s ease}
    .btn-primary{background:var(--teal);color:#fff}
    .btn-secondary{background:#fff;color:var(--teal)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 9px 20px rgba(11,155,157,.2)}
    .signal-panel{border-left:1px solid rgba(18,61,72,.2);padding-left:28px}
    .signal-panel h3{font-size:24px;margin-bottom:22px}
    .signal-list{display:grid;gap:12px}
    .signal-item{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid rgba(11,155,157,.15);padding:14px 16px;border-radius:10px}
    .signal-number{font-size:24px;font-weight:800;color:var(--teal)}
    .signal-item strong{display:block;color:var(--navy)}
    .signal-item span{font-size:13px;color:var(--muted)}
    section{padding:86px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:34px}
    .section-head p{max-width:560px;color:var(--muted);margin:0}
    .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}
    .about-text{font-size:17px;color:#49666d}
    .about-text strong{color:var(--navy)}
    .feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .feature{background:#fff;border-left:4px solid var(--cyan);padding:18px;border-radius:8px;box-shadow:0 5px 18px rgba(18,61,72,.05)}
    .feature b{display:block;margin-bottom:5px;color:var(--navy)}
    .feature span{font-size:14px;color:var(--muted)}
    .metrics{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:25px 0}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
    .metric{background:#fff;text-align:center;padding:20px}
    .metric strong{font-size:32px;color:var(--teal);display:block}
    .metric span{font-size:13px;color:var(--muted)}
    .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 ease}
    .service-card:hover,.review:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service-card .index{color:var(--teal);font-size:13px;font-weight:800}
    .service-card p,.case p,.review p{color:var(--muted);font-size:14px;margin:0}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
    .tag{border:1px solid var(--line);background:var(--pale);border-radius:20px;padding:4px 10px;font-size:12px;color:#477078}
    .workflow{background:#e9f7f4;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0}
    .step{position:relative;padding:15px 20px 15px 0}
    .step:not(:last-child):after{content:"→";position:absolute;right:12px;top:28px;color:var(--teal);font-size:22px}
    .step-num{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--teal);color:#fff;font-weight:800;margin-bottom:14px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .solution{background:#fff;padding:24px;border-top:3px solid var(--teal);border-radius:0 0 12px 12px;box-shadow:0 5px 18px rgba(18,61,72,.05)}
    .solution p{font-size:14px;color:var(--muted);margin:0}
    .network{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center}
    .network-copy{background:var(--navy);color:#fff;padding:34px;border-radius:14px}
    .network-copy h2,.network-copy h3{color:#fff}
    .network-copy p{color:#c9e5e3}
    .model-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .model-cloud span{background:#fff;border:1px solid var(--line);color:#35616a;padding:10px 13px;border-radius:7px;font-size:14px}
    .comparison-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:12px}
    table{width:100%;min-width:720px;border-collapse:collapse}
    th,td{padding:16px 18px;border-bottom:1px solid var(--line);text-align:left;font-size:14px}
    th{background:#e7f7f4;color:var(--navy)}
    td:first-child{font-weight:700;color:var(--navy)}
    .rating{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 24px;background:var(--navy);color:#fff;border-radius:12px 12px 0 0}
    .rating strong{font-size:30px;color:#7de4d6}
    .stars{color:#ffd56a;font-size:22px;letter-spacing:2px}
    .cases{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.25s ease}
    .case-media{aspect-ratio:16/9;overflow:hidden;background:#dff5f1}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:20px}
    .case-body h3{font-size:18px;margin-bottom:8px}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review{background:#fff;padding:22px;border:1px solid var(--line);border-radius:12px;transition:.25s ease}
    .review-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}
    .review-head strong{color:var(--navy)}
    .review-head span{color:#e39d38;font-size:13px}
    .review p{font-size:15px}
    .article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .article{background:#fff;border:1px solid var(--line);padding:18px;border-radius:9px;font-size:14px;font-weight:700;color:var(--navy)}
    .article span{display:block;color:var(--teal);font-size:12px;margin-top:10px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 28px}
    details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px 18px}
    summary{cursor:pointer;font-weight:700;color:var(--navy);padding-right:16px}
    details p{color:var(--muted);font-size:14px;margin:12px 0 0}
    .contact{background:#e9f7f4}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:start}
    .contact-info p{color:var(--muted)}
    .contact-links{display:grid;gap:8px;margin-top:22px}
    .contact-links a{color:var(--teal);font-weight:700}
    form{background:#fff;padding:26px;border:1px solid var(--line);border-radius:12px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{font-size:13px;font-weight:700;color:var(--navy);display:grid;gap:6px}
    input,select,textarea{font:inherit;border:1px solid #c8ddda;border-radius:7px;padding:11px 12px;color:var(--ink);background:#fbfefd}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{background:#123d48;color:#d8eeeb;padding:48px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:30px}
    .footer h3{color:#fff;font-size:17px}
    .footer p,.footer a{font-size:13px;color:#b8d7d4}
    .footer a:hover{color:#fff}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 18px}
    .copyright{border-top:1px solid rgba(255,255,255,.16);margin-top:30px;padding-top:16px;font-size:12px;color:#a9c7c4}
    .float-service{position:fixed;right:20px;bottom:20px;z-index:15;background:var(--teal);color:#fff;padding:13px 16px;border-radius:30px;box-shadow:0 10px 25px rgba(11,155,157,.28);font-weight:700}
    .qr-pop{display:none;position:absolute;right:0;bottom:52px;background:#fff;padding:10px;border-radius:8px;box-shadow:var(--shadow);width:150px}
    .float-service:hover .qr-pop{display:block}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:950px){
      .nav-links{display:none;position:absolute;top:74px;left:0;right:0;background:#fff;padding:10px 18px;border-bottom:1px solid var(--line);box-shadow:0 10px 20px rgba(18,61,72,.08)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:11px 4px}
      .nav-cta{margin-left:0}
      .menu-toggle{display:block}
      .hero-inner,.about-grid,.network,.contact-grid{grid-template-columns:1fr}
      .signal-panel{border-left:0;border-top:1px solid rgba(18,61,72,.2);padding:26px 0 0}
      .service-grid,.cases,.reviews{grid-template-columns:repeat(2,1fr)}
      .article-list{grid-template-columns:repeat(3,1fr)}
      .steps{grid-template-columns:repeat(5,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1160px)}
      section{padding:60px 0}
      .hero-inner{padding:70px 0 58px;gap:36px}
      h1{font-size:40px}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .metric-grid{grid-template-columns:1fr 1fr}
      .feature-list,.solution-grid,.faq-grid,.form-grid{grid-template-columns:1fr}
      .service-grid,.cases,.reviews{grid-template-columns:1fr}
      .article-list{grid-template-columns:1fr 1fr}
      .steps{display:block}
      .step{padding:0 0 22px 48px}
      .step:not(:last-child):after{content:"↓";right:auto;left:13px;top:47px}
      .step-num{position:absolute;left:0;top:0}
      .footer-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
    }