:root{
      --yellow:#ffd21f;
      --yellow-deep:#f4b900;
      --ink:#17202b;
      --muted:#617080;
      --paper:#fffdf5;
      --line:#e9e5d8;
      --blue:#244b62;
      --green:#2f7d62;
      --shadow:0 18px 50px rgba(35,43,48,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"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:min(1180px,calc(100% - 36px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,253,245,.94);border-bottom:1px solid rgba(233,229,216,.9);backdrop-filter:blur(14px)}
    .nav-bar{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--ink);white-space:nowrap}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand-name{font-size:19px;letter-spacing:0}
    .nav-links{display:flex;align-items:center;gap:0}
    .nav-links a{padding:8px 10px;color:#45515d;font-size:14px;transition:.25s}
    .nav-links a:hover{color:#b77a00}
    .nav-action{background:var(--ink);color:#fff;padding:11px 17px;border-radius:8px;font-size:14px;white-space:nowrap;transition:.25s}
    .nav-action:hover{background:#415465;transform:translateY(-2px)}
    .menu-toggle{display:none;border:0;background:transparent;font-size:25px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#fff9d8 0%,#fffdf5 48%,#eaf3ee 100%);padding:92px 0 72px}
    .hero:after{content:"";position:absolute;right:-140px;top:-130px;width:430px;height:430px;border:72px solid rgba(255,210,31,.34);border-radius:50%;pointer-events:none}
    .hero-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(300px,.82fr);gap:60px;align-items:center;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#936900;font-size:13px;font-weight:800;letter-spacing:1px;margin-bottom:16px}
    .eyebrow:before{content:"";width:26px;height:3px;background:var(--yellow-deep)}
    h1,h2,h3{line-height:1.25;margin:0 0 18px;letter-spacing:0}
    h1{font-size:clamp(38px,5vw,68px);max-width:680px}
    h2{font-size:clamp(28px,3.4vw,44px)}
    h3{font-size:20px}
    .hero-copy{font-size:18px;color:#52606c;max-width:650px;margin:0 0 28px}
    .actions{display:flex;flex-wrap:wrap;gap:12px}
    .btn{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--ink);border-radius:8px;padding:12px 20px;font-weight:700;transition:.25s;cursor:pointer}
    .btn-primary{background:var(--yellow);border-color:var(--yellow);color:#26210e}
    .btn-primary:hover{background:#ffe269;transform:translateY(-2px);box-shadow:0 8px 18px rgba(210,163,0,.2)}
    .btn-secondary{background:#fff;color:var(--ink)}
    .btn-secondary:hover{background:#f4f0e2}
    .hero-panel{border-left:4px solid var(--yellow-deep);padding:8px 0 8px 28px}
    .hero-panel strong{display:block;font-size:25px;margin-bottom:10px}
    .hero-panel p{color:var(--muted);margin:0}
    .metric-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#ded8c5;border:1px solid #ded8c5;margin-top:42px}
    .metric{background:#fffdf5;padding:22px 18px}
    .metric b{font-size:30px;color:#bd8200;display:block}
    .metric span{font-size:13px;color:var(--muted)}
    section{padding:88px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
    .section-head p{max-width:550px;color:var(--muted);margin:0}
    .section-label{color:#b07d00;font-weight:800;font-size:13px;margin-bottom:10px;letter-spacing:1px}
    .about{background:#fff}
    .about-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:64px;align-items:start}
    .about-intro{font-size:20px;color:#3b4955}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
    .feature{border-top:3px solid var(--yellow);padding-top:16px}
    .feature p,.service-card p,.solution p,.quote p{color:var(--muted);margin:0}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-card{background:#fff;border:1px solid var(--line);padding:24px;border-radius:12px;transition:.25s}
    .service-card:hover,.solution:hover,.quote:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .service-card .icon{font-size:27px;margin-bottom:14px;color:#b77a00}
    .service-card h3{font-size:18px}
    .workflow{background:#17202b;color:#fff}
    .workflow .section-label{color:var(--yellow)}
    .workflow .section-head p{color:#b9c3ca}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid #53606b}
    .step{padding:28px 20px 10px 0;border-right:1px solid #53606b;margin-right:20px}
    .step:last-child{border-right:0}
    .step-number{color:var(--yellow);font-size:28px;font-weight:800}
    .step p{color:#b9c3ca;font-size:14px}
    .solutions{background:#f2f6f1}
    .solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .solution{background:#fff;padding:26px;border-radius:12px;border:1px solid #dae6db;transition:.25s}
    .solution h3{font-size:19px}
    .tag-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px}
    .tag{border:1px solid #d8cfaa;background:#fff9d8;padding:7px 12px;border-radius:20px;font-size:13px;color:#66521a}
    .network{background:#fff}
    .network-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:start}
    .network-box{background:#fff8ce;border:1px solid #eedc7a;padding:30px;border-radius:16px}
    .network-box h3{font-size:26px}
    .model-cloud{display:flex;flex-wrap:wrap;gap:11px;margin-top:20px}
    .model-cloud span{background:#fff;border:1px solid #d9d4bf;padding:8px 13px;border-radius:7px;font-size:14px}
    .timeline{border-left:3px solid var(--yellow);padding-left:24px}
    .timeline-item{position:relative;margin-bottom:24px}
    .timeline-item:before{content:"";position:absolute;left:-34px;top:8px;width:13px;height:13px;background:var(--yellow);border-radius:50%;border:3px solid #fff}
    .timeline-item h3{margin-bottom:5px;font-size:18px}
    .timeline-item p{color:var(--muted);margin:0}
    .cases{background:#fffaf0}
    .case-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px}
    .case{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:12px}
    .case-image{aspect-ratio:16/9;overflow:hidden;background:#eee7ca}
    .case-image img{width:100%;height:100%;object-fit:cover}
    .case-copy{padding:20px}
    .case-copy p{color:var(--muted);margin:0}
    .compare{background:#fff}
    .score-box{display:flex;align-items:center;gap:22px;background:var(--yellow);padding:23px 28px;border-radius:12px;margin-bottom:24px}
    .score-box strong{font-size:42px;line-height:1}
    .stars{color:#654d00;font-size:22px;letter-spacing:3px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
    table{width:100%;border-collapse:collapse;min-width:720px;background:#fff}
    th,td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#fff8d5;color:#6d5600}
    td:first-child{font-weight:700;width:23%}
    .match{background:#eef5f0}
    .match-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:46px}
    .price-list{display:grid;gap:12px}
    .price-row{display:flex;justify-content:space-between;gap:16px;padding:17px 0;border-bottom:1px solid #d5e2d8}
    .price-row b{color:#a86f00}
    form{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    .field-full{grid-column:1/-1}
    label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}
    input,select,textarea{width:100%;border:1px solid #ccd7d0;border-radius:7px;padding:12px 13px;background:#fff;font:inherit;color:var(--ink)}
    textarea{min-height:120px;resize:vertical}
    .help-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px}
    .faq-list{display:grid;gap:10px}
    details{background:#fff;border:1px solid var(--line);border-radius:8px;padding:15px 18px}
    summary{cursor:pointer;font-weight:700;padding-right:20px}
    details p{color:var(--muted);margin:12px 0 0}
    .quotes{background:#fff8d5}
    .quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote{background:#fff;padding:22px;border-radius:12px;border:1px solid #eee1a3;transition:.25s}
    .quote cite{display:block;margin-top:17px;font-style:normal;font-weight:700;color:#705a11;font-size:14px}
    .articles{background:#fff}
    .article-layout{display:grid;grid-template-columns:1.3fr .7fr;gap:38px}
    .article-list{display:grid;gap:0}
    .article-list a{display:flex;justify-content:space-between;gap:18px;padding:16px 0;border-bottom:1px solid var(--line);font-weight:700}
    .article-list a span{color:#ae7b00;font-size:13px;white-space:nowrap}
    .article-side{background:var(--blue);color:#fff;padding:28px;border-radius:14px}
    .article-side p{color:#d6e1e5}
    .contact{background:#fff8d5}
    .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
    .contact-info{display:grid;gap:15px;margin-top:28px}
    .contact-line{display:flex;gap:13px;align-items:start}
    .contact-line b{min-width:76px}
    .qr{width:120px;margin-top:10px;border:5px solid #fff}
    .join{background:#244b62;color:#fff;padding:62px 0}
    .join-layout{display:flex;justify-content:space-between;align-items:center;gap:30px}
    .join p{color:#d8e2e6;margin:0}
    .join .btn-secondary{border-color:#fff}
    footer{background:#121a21;color:#dbe2e5;padding:34px 0 24px}
    .footer-top{display:flex;justify-content:space-between;gap:30px;align-items:start}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 18px;max-width:650px}
    .footer-links a{color:#dbe2e5;font-size:14px}
    .footer-links a:hover{color:var(--yellow)}
    .footer-bottom{border-top:1px solid #34404a;margin-top:25px;padding-top:18px;color:#9ca9b1;font-size:13px;display:flex;justify-content:space-between;gap:20px}
    .float-contact{position:fixed;right:22px;bottom:24px;z-index:15;background:var(--yellow);color:#28220b;border-radius:50%;width:58px;height:58px;display:flex;align-items:center;justify-content:center;font-weight:800;box-shadow:0 8px 25px rgba(0,0,0,.18);transition:.25s}
    .float-contact:hover{transform:scale(1.08)}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .65s ease,transform .65s ease}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:1050px){
      .nav-links a{padding:8px 6px;font-size:13px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .case-grid{grid-template-columns:1fr 1fr}
      .case:first-child{grid-column:1/-1}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,620px)}
      .nav-bar{min-height:66px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#fffdf5;border-bottom:1px solid var(--line);padding:12px 14px;flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px;border-bottom:1px solid #eee9da}
      .nav-action{display:none}
      .hero{padding:66px 0 48px}
      .hero-grid,.about-grid,.network-layout,.match-layout,.help-grid,.article-layout,.contact-grid{grid-template-columns:1fr;gap:32px}
      h1{font-size:42px}
      section{padding:62px 0}
      .metric-strip{grid-template-columns:repeat(2,1fr)}
      .feature-list,.solution-grid,.quote-grid{grid-template-columns:1fr}
      .service-grid{grid-template-columns:1fr}
      .steps{grid-template-columns:1fr;border-top:0}
      .step{border-right:0;border-bottom:1px solid #53606b;padding:18px 0;margin:0}
      .case-grid{grid-template-columns:1fr}
      .case:first-child{grid-column:auto}
      .score-box{align-items:flex-start;flex-direction:column;gap:8px}
      form{grid-template-columns:1fr}
      .field-full{grid-column:auto}
      .section-head{display:block}
      .section-head p{margin-top:14px}
      .join-layout,.footer-top,.footer-bottom{display:block}
      .join .btn{margin-top:20px}
      .footer-links{margin-top:20px}
      .footer-bottom span{display:block;margin-top:8px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}
    }