:root {
      --ink:#17213d;
      --muted:#64708b;
      --navy:#101936;
      --cyan:#00c8d9;
      --pink:#ed4e9c;
      --violet:#6958e8;
      --mint:#dcfbf7;
      --paper:#f7f9fc;
      --line:#e2e7f0;
      --white:#fff;
      --shadow:0 18px 45px rgba(26,42,82,.10);
      --container:min(1180px,calc(100% - 40px));
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);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}
    .container{width:var(--container);margin:0 auto}
    .topbar{background:#0b1230;color:#cbd5f4;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar a{color:#fff}
    header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(226,231,240,.9);backdrop-filter:blur(14px)}
    .nav-wrap{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;font-weight:800;letter-spacing:.02em}
    .ai-page-logo{width:42px;max-height:42px;object-fit:contain}
    .brand-name{font-size:18px}
    .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:13px;color:#53607b;padding:8px 9px;transition:.2s}
    .nav-links a:hover{color:var(--pink)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer;font:inherit;font-weight:700;border-radius:8px;padding:12px 18px;transition:transform .2s,box-shadow .2s,background .2s}
    .nav-cta{background:var(--pink);color:#fff;margin-left:12px;white-space:nowrap}
    .nav-cta:hover,.button:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(237,78,156,.22)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:8px;padding:9px 12px;font-size:18px}
    .hero{position:relative;overflow:hidden;background:var(--navy);color:#fff;padding:86px 0 74px}
    .hero:before,.hero:after{content:"";position:absolute;pointer-events:none;border:1px solid rgba(0,200,217,.28);transform:rotate(22deg)}
    .hero:before{width:420px;height:420px;right:-90px;top:-180px;border-radius:34px;box-shadow:0 0 0 18px rgba(237,78,156,.08),0 0 0 38px rgba(0,200,217,.06)}
    .hero:after{width:180px;height:180px;left:-70px;bottom:-80px;border-radius:50%}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:62px;align-items:center;position:relative;z-index:1}
    .eyebrow{color:#52e6e0;text-transform:uppercase;letter-spacing:.14em;font-size:12px;font-weight:800}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.13;letter-spacing:0;margin:18px 0 22px;max-width:700px}
    .hero-copy{font-size:18px;color:#d5dcf5;max-width:650px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
    .button-primary{background:#20d6d0;color:#08233c}
    .button-light{background:#fff;color:var(--navy)}
    .button-outline{border:1px solid #8e9ac7;color:#fff;background:transparent}
    .hero-note{font-size:13px;color:#adb9dc;margin-top:18px}
    .hero-panel{border-left:1px solid rgba(255,255,255,.2);padding-left:28px}
    .hero-panel h2{font-size:17px;margin-bottom:18px;color:#fff}
    .signal-list{display:grid;gap:12px}
    .signal{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,.15);padding:12px 0;gap:16px}
    .signal strong{font-size:25px;color:#52e6e0;white-space:nowrap}
    .signal span{color:#c5cdeb;font-size:14px}
    .section{padding:84px 0}
    .section-tint{background:#eef7fa}
    .section-dark{background:#101936;color:#fff}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:34px}
    .section-head h2{font-size:clamp(27px,3.2vw,42px);line-height:1.2;margin:10px 0 0}
    .section-head p{color:var(--muted);max-width:560px;margin:0}
    .section-dark .section-head p{color:#bcc7e4}
    .accent{color:var(--pink)}
    .intro-layout{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
    .intro-layout p{color:var(--muted)}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .metric{background:#fff;border-top:3px solid var(--cyan);padding:22px 18px;box-shadow:var(--shadow)}
    .metric strong{display:block;font-size:30px;color:var(--navy)}
    .metric span{font-size:13px;color:var(--muted)}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .service-card,.review-card,.case-card{background:#fff;border:1px solid var(--line);padding:24px;transition:.25s}
    .service-card:hover,.review-card:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#a8dfe1}
    .service-card h3{font-size:19px;margin-bottom:8px}
    .service-card p,.review-card p,.case-card p{color:var(--muted);font-size:14px;margin-bottom:0}
    .service-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:var(--mint);color:#078a9b;font-weight:800;margin-bottom:18px}
    .pill-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:26px}
    .pill{font-size:13px;border:1px solid #b5dadd;color:#176c79;padding:6px 11px;border-radius:99px;background:#f4ffff}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid #bfd4df}
    .step{padding:24px 22px 8px 0;position:relative}
    .step:not(:last-child){margin-right:24px}
    .step:not(:last-child):after{content:"→";position:absolute;right:2px;top:22px;color:var(--pink);font-size:25px}
    .step-number{font-size:13px;color:var(--pink);font-weight:800;letter-spacing:.1em}
    .step h3{font-size:18px;margin:8px 0}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .solution-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:30px;align-items:start}
    .solution-list{display:grid;gap:12px}
    .solution-item{display:flex;gap:14px;padding:15px 0;border-bottom:1px solid var(--line)}
    .solution-item b{color:var(--pink);font-size:14px;min-width:72px}
    .solution-item span{font-size:14px;color:var(--muted)}
    .network-box{background:#101936;color:#fff;padding:32px}
    .network-box h3{font-size:24px;margin-bottom:14px}
    .network-box p{color:#c6d0ec}
    .model-cloud{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
    .model-cloud span{padding:7px 10px;border:1px solid rgba(82,230,224,.42);color:#9ce9e8;font-size:13px}
    .media-strip{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:14px;margin-top:32px}
    .media-strip figure{margin:0;background:#fff;border:1px solid var(--line);padding:8px}
    .media-strip img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .media-strip figcaption{font-size:12px;color:var(--muted);padding:9px 4px 3px}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
    th{background:#effbfc;color:#0b6f7a;font-size:13px}
    tr:last-child td{border-bottom:0}
    .score{display:flex;gap:28px;align-items:center;background:#fff;padding:28px;margin-bottom:20px;border-left:4px solid var(--pink);box-shadow:var(--shadow)}
    .score strong{font-size:44px;color:var(--pink);line-height:1}
    .stars{color:#f3a323;letter-spacing:3px;font-size:21px}
    .case-grid,.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case-card{padding:0;overflow:hidden}
    .case-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .case-body{padding:20px}
    .case-body h3{margin-bottom:7px}
    .review-card{position:relative}
    .review-card:before{content:"“";font-family:Georgia,serif;color:#c9eff0;font-size:56px;position:absolute;right:18px;top:0}
    .review-role{font-size:13px;color:#0b8994;font-weight:700}
    .review-card h3{font-size:17px;margin:4px 0 12px}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0 34px;border-top:1px solid var(--line)}
    .article-list a{display:flex;justify-content:space-between;gap:18px;padding:17px 0;border-bottom:1px solid var(--line);font-size:15px}
    .article-list a span:last-child{color:var(--pink);font-size:13px;white-space:nowrap}
    .faq-list{display:grid;gap:10px;max-width:900px}
    details{background:#fff;border:1px solid var(--line)}
    summary{cursor:pointer;padding:17px 20px;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:14px}
    summary:after{content:"+";color:var(--pink);font-size:20px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{padding:0 20px 18px;color:var(--muted);font-size:14px;margin:0}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:44px;align-items:start}
    .contact-card{background:#101936;color:#fff;padding:30px}
    .contact-card p{color:#c5cdeb}
    .contact-line{padding:13px 0;border-bottom:1px solid rgba(255,255,255,.16);font-size:14px}
    .contact-line b{display:block;color:#55e1db;margin-bottom:3px}
    form{background:#fff;border:1px solid var(--line);padding:30px;display:grid;gap:16px}
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    label{font-size:13px;color:#55617c;font-weight:700}
    input,select,textarea{width:100%;margin-top:7px;border:1px solid #d8deea;border-radius:6px;padding:12px 13px;font:inherit;color:var(--ink);background:#fbfcfe}
    textarea{min-height:118px;resize:vertical}
    .footer{background:#0b1230;color:#dbe2f7;padding:44px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:35px}
    .footer h3{color:#fff;font-size:16px;margin-bottom:13px}
    .footer p,.footer a{font-size:13px;color:#b8c4e1}
    .footer a:hover{color:#52e6e0}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px 18px}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:18px;font-size:12px;color:#8794b7}
    .float-tools{position:fixed;right:18px;bottom:20px;z-index:15;display:grid;gap:9px}
    .float-tools a{background:var(--pink);color:#fff;padding:10px 13px;border-radius:7px;box-shadow:0 8px 20px rgba(237,78,156,.25);font-size:13px}
    .float-tools a:last-child{background:var(--navy)}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.show{opacity:1;transform:none}
    @media(max-width:1050px){
      .nav-links a{padding-left:6px;padding-right:6px}
      .nav-cta{padding:10px 12px}
    }
    @media(max-width:820px){
      :root{--container:min(100% - 28px,680px)}
      .topbar-inner{justify-content:center;text-align:center}
      .topbar-inner span{display:none}
      .nav-wrap{min-height:64px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:70px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:10px;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:10px 9px}
      .nav-cta{margin:0 0 0 8px}
      .hero{padding:64px 0 58px}
      .hero-grid,.intro-layout,.solution-grid,.contact-grid{grid-template-columns:1fr;gap:34px}
      .hero-panel{border-left:0;border-top:1px solid rgba(255,255,255,.2);padding:24px 0 0}
      .metric-grid{grid-template-columns:repeat(2,1fr)}
      .service-grid,.case-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
      .process{grid-template-columns:repeat(2,1fr);gap:10px}
      .step:not(:last-child):after{display:none}
      .media-strip{grid-template-columns:1fr 1fr}
      .media-strip figure:first-child{grid-column:1/-1}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      h1{font-size:39px}
      .section{padding:60px 0}
      .section-head{display:block}
      .section-head p{margin-top:14px}
      .metric-grid,.service-grid,.case-grid,.review-grid,.process,.article-list,.form-row,.footer-grid,.media-strip{grid-template-columns:1fr}
      .media-strip figure:first-child{grid-column:auto}
      .score{align-items:flex-start;gap:16px;padding:22px}
      .score strong{font-size:36px}
      .float-tools{right:12px;bottom:12px}
      .float-tools a{font-size:12px;padding:8px 10px}
    }