:root{
      --ink:#172033;
      --muted:#607086;
      --blue:#315cf5;
      --cyan:#18bfe9;
      --pink:#f45e9e;
      --yellow:#ffc84a;
      --green:#36c98f;
      --paper:#fffdf9;
      --mist:#f5f8ff;
      --line:#e7ebf3;
      --shadow:0 18px 45px rgba(35,63,120,.10);
      --container:min(1160px,calc(100% - 40px));
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"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}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,253,249,.94);border-bottom:1px solid rgba(231,235,243,.9);backdrop-filter:blur(14px)}
    .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:10px;flex:none}
    .ai-page-logo{width:126px}
    .nav-links{display:flex;align-items:center;gap:0;justify-content:flex-end;flex-wrap:wrap}
    .nav-links a{padding:8px 10px;color:#526076;font-size:13px;transition:.25s}
    .nav-links a:hover{color:var(--blue)}
    .nav-cta,.primary-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:8px;background:var(--blue);color:#fff;font-weight:700;padding:12px 20px;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s}
    .nav-cta{font-size:13px;padding:10px 16px;margin-left:12px}
    .nav-cta:hover,.primary-btn:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(49,92,245,.25);background:#2349d6}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:7px;padding:9px 11px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff7db 0%,#f5f8ff 52%,#fff0f7 100%);padding:92px 0 70px}
    .hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero:before{width:270px;height:270px;background:rgba(255,200,74,.25);right:-90px;top:-80px}
    .hero:after{width:190px;height:190px;background:rgba(24,191,233,.17);left:-85px;bottom:-65px}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:58px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#d94d85;font-weight:800;font-size:13px;letter-spacing:1px}
    .eyebrow:before{content:"";width:27px;height:4px;border-radius:5px;background:var(--pink)}
    h1{font-size:clamp(36px,5vw,66px);line-height:1.13;letter-spacing:0;margin:18px 0 22px;max-width:680px}
    .hero-copy{font-size:18px;color:#526076;max-width:650px;margin:0 0 28px}
    .actions{display:flex;align-items:center;gap:13px;flex-wrap:wrap}
    .secondary-btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid #cbd5ea;color:var(--ink);background:#fff;padding:11px 19px;border-radius:8px;font-weight:700;transition:.25s}
    .secondary-btn:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}
    .hero-note{font-size:13px;color:#748096;margin-top:18px}
    .hero-panel{padding:26px;background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.85);box-shadow:var(--shadow);border-radius:18px}
    .panel-title{font-size:18px;font-weight:800;margin:0 0 18px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{padding:17px 15px;background:#fff;border-radius:12px;border:1px solid var(--line)}
    .metric strong{display:block;font-size:25px;color:var(--blue);line-height:1.2}
    .metric span{font-size:12px;color:var(--muted)}
    .section{padding:88px 0}
    .section.tinted{background:var(--mist)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-kicker{color:var(--pink);font-size:13px;font-weight:800;letter-spacing:1px;margin-bottom:7px}
    h2{font-size:clamp(28px,3.5vw,44px);line-height:1.2;margin:0;letter-spacing:0}
    .section-intro{max-width:590px;color:var(--muted);margin:0}
    .intro-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:start}
    .intro-text{font-size:17px;color:#526076}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin-top:25px}
    .feature{border-left:4px solid var(--cyan);padding:11px 15px;background:#fff;border-radius:0 10px 10px 0;box-shadow:0 7px 20px rgba(35,63,120,.06)}
    .feature b{display:block;margin-bottom:3px}
    .feature span{font-size:13px;color:var(--muted)}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 19px;transition:.25s}
    .service-card:hover,.review:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;font-weight:900;color:#fff;background:var(--blue);margin-bottom:16px}
    .service-card:nth-child(2n) .service-mark{background:var(--pink)}
    .service-card:nth-child(3n) .service-mark{background:var(--green)}
    .service-card h3{font-size:17px;margin:0 0 8px}
    .service-card p{font-size:13px;color:var(--muted);margin:0}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid #dce4fb}
    .step{position:relative;padding:28px 18px 8px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-num{position:absolute;top:-17px;left:18px;width:32px;height:32px;border-radius:50%;background:var(--yellow);display:grid;place-items:center;font-weight:900;color:#594500}
    .step h3{font-size:17px;margin:11px 0 7px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .industry-grid,.case-grid,.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .industry{padding:22px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .industry h3{margin:0 0 8px;font-size:18px}
    .industry p{margin:0;color:var(--muted);font-size:14px}
    .tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:19px}
    .tag{padding:5px 10px;border-radius:20px;background:#eef3ff;color:#3150b6;font-size:12px}
    .network{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:stretch}
    .network-box{padding:27px;background:#18243c;color:#fff;border-radius:14px}
    .network-box h3{margin:0 0 13px}
    .network-box p{color:#d2d9e8;margin:0 0 18px}
    .model-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .model-cloud span{background:#fff;color:#33415e;border-radius:5px;padding:5px 9px;font-size:12px}
    .network-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .network-list div{padding:14px;background:#fff;border:1px solid var(--line);border-radius:9px;font-size:14px}
    .network-list strong{display:block;color:var(--blue);font-size:21px}
    .comparison-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:14px}
    table{border-collapse:collapse;width:100%;min-width:760px}
    th,td{text-align:left;padding:17px 18px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#f2f5ff;color:#243d9a}
    tr:last-child td{border-bottom:0}
    td:first-child{font-weight:700}
    .score-box{display:flex;gap:18px;align-items:center;margin-bottom:20px}
    .score{font-size:44px;font-weight:900;color:var(--blue);line-height:1}
    .stars{color:#f3ac00;font-size:22px;letter-spacing:2px}
    .case-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.25s}
    .case-image{aspect-ratio:16/9;overflow:hidden;background:#f1f5ff}
    .case-image img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:18px}
    .case-body h3{font-size:17px;margin:0 0 7px}
    .case-body p{font-size:13px;color:var(--muted);margin:0}
    .reviews{background:#fff8e9}
    .review{background:#fff;border:1px solid #f4e5bf;border-radius:12px;padding:20px;transition:.25s}
    .review p{margin:0 0 15px;color:#46536a;font-size:14px}
    .review footer{font-size:13px;font-weight:800;color:#23304b}
    .review footer span{display:block;color:#8a94a5;font-weight:400}
    .price-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:26px;align-items:start}
    .price-callout{background:linear-gradient(135deg,#315cf5,#18bfe9);color:#fff;padding:30px;border-radius:14px}
    .price-callout h3{font-size:27px;margin:0 0 12px}
    .price-callout p{color:#e9f7ff;margin:0 0 22px}
    .price-callout .secondary-btn{background:#fff;border-color:#fff;color:#2450d7}
    .price-list{display:grid;gap:10px}
    .price-row{display:flex;justify-content:space-between;gap:20px;padding:15px 17px;background:#fff;border:1px solid var(--line);border-radius:9px}
    .price-row span{color:var(--muted);font-size:14px}
    .price-row strong{color:var(--blue)}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 30px}
    details{border-bottom:1px solid var(--line);padding:5px 0}
    summary{cursor:pointer;list-style:none;font-weight:700;padding:13px 28px 13px 0;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:3px;font-size:22px;color:var(--blue)}
    details[open] summary:after{content:"−"}
    details p{margin:0 0 14px;color:var(--muted);font-size:14px}
    .article-layout{display:grid;grid-template-columns:1fr .7fr;gap:28px}
    .article-list{display:grid;gap:10px}
    .article-item{display:flex;justify-content:space-between;gap:20px;padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:9px;transition:.2s}
    .article-item:hover{border-color:#afc0ff;color:var(--blue)}
    .article-item span{color:var(--muted);font-size:12px;white-space:nowrap}
    .link-box{padding:23px;background:#fff;border:1px solid var(--line);border-radius:12px}
    .link-box h3{margin:0 0 14px}
    .link-cloud{display:flex;flex-wrap:wrap;gap:9px}
    .link-cloud a{font-size:13px;color:#3150b6;padding:5px 9px;background:#eef3ff;border-radius:5px}
    .form-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:32px;align-items:start}
    .contact-copy p{color:var(--muted)}
    .contact-details{display:grid;gap:11px;margin-top:24px}
    .contact-details div{padding:12px 15px;border-left:3px solid var(--pink);background:#fff}
    .form-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:25px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    label{display:grid;gap:7px;font-size:13px;font-weight:700}
    input,select,textarea{width:100%;border:1px solid #d9dfeb;border-radius:7px;padding:11px 12px;font:inherit;color:var(--ink);background:#fff}
    textarea{min-height:125px;resize:vertical}
    .full{grid-column:1/-1}
    .form-submit{margin-top:18px}
    .qr{width:120px;margin-top:14px;border-radius:8px}
    .footer{background:#17233b;color:#e6ebf6;padding:40px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:35px}
    .footer h3{color:#fff;margin:0 0 13px;font-size:17px}
    .footer p,.footer a{color:#bfc9dc;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 15px}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:30px;padding-top:18px;color:#aab7cc;font-size:12px}
    .float-tools{position:fixed;right:18px;bottom:22px;z-index:15;display:grid;gap:9px}
    .float-tools a{width:46px;height:46px;border-radius:50%;display:grid;place-items:center;background:var(--blue);color:#fff;font-weight:800;box-shadow:0 9px 22px rgba(49,92,245,.25);font-size:12px}
    .float-tools a:last-child{background:var(--pink)}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:1020px){
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:68px;background:#fff;border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);border-radius:10px}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{padding:10px}
      .menu-toggle{display:block}
      .nav-cta{margin-left:auto}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .hero-grid,.intro-layout,.price-layout,.form-layout{grid-template-columns:1fr}
      .hero-panel{max-width:560px}
    }
    @media(max-width:700px){
      :root{--container:calc(100% - 28px)}
      .site-header .nav-cta{display:none}
      .hero{padding:65px 0 55px}
      .hero-copy{font-size:16px}
      .section{padding:62px 0}
      .section-head{display:block}
      .section-intro{margin-top:13px}
      .feature-list,.industry-grid,.case-grid,.review-grid,.faq-grid{grid-template-columns:1fr}
      .service-grid{grid-template-columns:1fr 1fr}
      .workflow{display:grid;grid-template-columns:1fr 1fr;border-top:0;gap:12px}
      .step{border:1px solid var(--line);border-radius:10px;background:#fff;padding:25px 15px 15px}
      .step-num{top:10px;left:auto;right:12px}
      .network{grid-template-columns:1fr}
      .article-layout{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      .footer-grid{grid-template-columns:1fr;gap:22px}
      h1{font-size:39px}
    }
    @media(prefers-reduced-motion:reduce){
      *,html{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }