:root{
      --blue:#1256d8;
      --blue-dark:#092d78;
      --blue-deep:#071d4d;
      --cyan:#2bc5e8;
      --ink:#102142;
      --muted:#60708d;
      --line:#dce6f5;
      --paper:#f5f8fd;
      --white:#fff;
      --gold:#f5b942;
      --shadow:0 16px 45px rgba(15,55,125,.12);
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .topbar{background:var(--blue-deep);color:#dce9ff;font-size:13px}
    .topbar-inner{min-height:34px;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,.96);border-bottom:1px solid rgba(220,230,245,.9);backdrop-filter:blur(12px)}
    .nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;min-width:180px}
    .ai-page-logo{width:132px}
    .brand-name{font-weight:800;color:var(--blue-dark);font-size:18px;white-space:nowrap}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:13px;color:#334463;padding:9px 9px;white-space:nowrap}
    .nav-links a:hover{color:var(--blue)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:5px;padding:12px 20px;background:var(--blue);color:#fff;font-weight:700;cursor:pointer;transition:.25s ease;box-shadow:0 8px 18px rgba(18,86,216,.2)}
    .nav-cta:hover,.button:hover{background:#0a43ad;transform:translateY(-2px)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--blue-dark);padding:8px 11px;border-radius:5px;font-size:20px}
    .hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#061a4c 0%,#0e47b3 63%,#0879c9 100%);color:#fff;padding:88px 0 78px}
    .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 0 58%,rgba(43,197,232,.16) 58% 59%,transparent 59% 72%,rgba(255,255,255,.07) 72% 73%,transparent 73%);pointer-events:none}
    .hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);gap:64px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:#a9e8fa;font-size:13px;font-weight:700;letter-spacing:1px}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--cyan)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(34px,5vw,62px);line-height:1.12;letter-spacing:0;margin:18px 0}
    .hero p{max-width:680px;color:#d9e8ff;font-size:17px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 36px}
    .button-light{background:#fff;color:var(--blue-dark)}
    .button-outline{background:transparent;border:1px solid rgba(255,255,255,.65);box-shadow:none}
    .button-outline:hover{background:#fff;color:var(--blue-dark)}
    .hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:620px}
    .hero-metric{border-left:2px solid var(--cyan);padding-left:14px}
    .hero-metric strong{display:block;font-size:25px;color:#fff}
    .hero-metric span{font-size:12px;color:#c1d5f5}
    .hero-panel{border:1px solid rgba(255,255,255,.24);background:rgba(6,29,77,.44);padding:26px;border-radius:8px;box-shadow:0 20px 50px rgba(3,18,54,.25)}
    .hero-panel h2{font-size:20px;margin-bottom:16px}
    .signal-list{display:grid;gap:12px}
    .signal{display:flex;align-items:flex-start;gap:12px;padding-bottom:12px;border-bottom:1px solid rgba(255,255,255,.14)}
    .signal:last-child{border-bottom:0;padding-bottom:0}
    .signal-mark{flex:0 0 28px;height:28px;border:1px solid var(--cyan);color:var(--cyan);display:grid;place-items:center;border-radius:50%;font-weight:800}
    .signal strong{display:block;font-size:14px}
    .signal span{font-size:12px;color:#c6d8f4}
    .section{padding:88px 0}
    .section-alt{background:#eef4fc}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:34px}
    .section-head h2{font-size:clamp(27px,3vw,42px);line-height:1.2;margin:10px 0;color:var(--blue-dark)}
    .section-head p{max-width:600px;color:var(--muted);margin-bottom:0}
    .kicker{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1px}
    .intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:start}
    .intro-copy p{color:var(--muted);font-size:16px}
    .feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .feature-item{padding:22px;background:#fff;border-top:3px solid var(--blue);box-shadow:var(--shadow)}
    .feature-item strong{display:block;color:var(--blue-dark);font-size:18px;margin-bottom:4px}
    .feature-item 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);padding:22px;min-height:186px;transition:.25s ease}
    .service-card:hover,.review-card:hover,.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#9cb9eb}
    .service-icon{width:38px;height:38px;display:grid;place-items:center;background:#e3efff;color:var(--blue);font-weight:900;border-radius:50%;margin-bottom:14px}
    .service-card h3{font-size:17px;margin-bottom:8px;color:var(--blue-dark)}
    .service-card p{font-size:13px;color:var(--muted);margin-bottom:0}
    .process{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid #b9cbea}
    .process-item{position:relative;padding:28px 20px 8px 0}
    .process-item:not(:last-child):after{content:"";position:absolute;top:39px;right:14px;width:25px;height:1px;background:var(--cyan)}
    .process-num{font-size:28px;font-weight:900;color:var(--blue)}
    .process-item h3{font-size:16px;margin:7px 0}
    .process-item p{font-size:13px;color:var(--muted);margin:0}
    .solution-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:stretch}
    .solution-main{background:var(--blue-dark);color:#fff;padding:34px}
    .solution-main h3{font-size:26px;margin-bottom:12px}
    .solution-main p{color:#d9e7ff}
    .timeline{display:grid;gap:14px;margin-top:25px}
    .timeline-item{display:grid;grid-template-columns:70px 1fr;gap:14px;align-items:start}
    .timeline-item strong{color:var(--cyan)}
    .timeline-item span{font-size:14px;color:#dbe7fa}
    .solution-side{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .mini-panel{background:#fff;border:1px solid var(--line);padding:22px}
    .mini-panel strong{display:block;color:var(--blue-dark);font-size:18px}
    .mini-panel span{font-size:13px;color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .tag-cloud span{padding:7px 12px;background:#e8f1ff;color:#285aa7;border-radius:3px;font-size:13px}
    .network{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .network-box{background:#fff;padding:28px;border:1px solid var(--line)}
    .network-box h3{color:var(--blue-dark);margin-bottom:12px}
    .model-list{display:flex;flex-wrap:wrap;gap:8px}
    .model-list span{font-size:12px;border:1px solid #c8d7ef;padding:5px 9px;color:#435b80;background:#f9fbff}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .case-card{background:#fff;border:1px solid var(--line);overflow:hidden;transition:.25s ease}
    .case-media{aspect-ratio:16/8;overflow:hidden;background:#dce8f9}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:21px}
    .case-body h3{font-size:18px;margin-bottom:7px;color:var(--blue-dark)}
    .case-body p{font-size:13px;color:var(--muted);margin:0}
    .table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line)}
    table{width:100%;min-width:760px;border-collapse:collapse}
    th,td{text-align:left;padding:16px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:var(--blue-dark);color:#fff;font-weight:700}
    tr:last-child td{border-bottom:0}
    td:first-child{font-weight:700;color:var(--blue-dark)}
    .score-box{display:flex;align-items:center;gap:24px;background:#fff;border-left:5px solid var(--gold);padding:20px 24px;margin-bottom:20px}
    .score{font-size:39px;line-height:1;color:var(--blue);font-weight:900}
    .stars{color:var(--gold);font-size:22px;letter-spacing:2px}
    .match-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:26px;align-items:start}
    .match-copy{background:linear-gradient(145deg,#0b347f,#1473c8);color:#fff;padding:32px}
    .match-copy h2{font-size:30px}
    .match-copy p{color:#deebff}
    .check-list{display:grid;gap:11px;margin:22px 0 0;padding:0;list-style:none}
    .check-list li:before{content:"✓";color:var(--cyan);font-weight:900;margin-right:9px}
    .form-panel{background:#fff;padding:30px;border:1px solid var(--line)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{display:grid;gap:6px;font-size:13px;font-weight:700;color:var(--blue-dark)}
    input,select,textarea{width:100%;border:1px solid #cbd9ec;border-radius:3px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}
    textarea{min-height:120px;resize:vertical}
    .field-full{grid-column:1/-1}
    .form-note{font-size:12px;color:var(--muted);margin:12px 0 0}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .article-card{background:#fff;padding:22px;border-bottom:3px solid var(--blue);border:1px solid var(--line)}
    .article-card small{color:var(--blue);font-weight:700}
    .article-card h3{font-size:17px;color:var(--blue-dark);margin:9px 0}
    .article-card p{font-size:13px;color:var(--muted);margin:0}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-card{background:#fff;border:1px solid var(--line);padding:23px;transition:.25s ease}
    .review-card p{font-size:14px;color:#405273}
    .review-card footer{font-size:13px;color:var(--blue);font-weight:700}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 28px}
    details{background:#fff;border:1px solid var(--line);padding:17px 19px}
    summary{cursor:pointer;color:var(--blue-dark);font-weight:700;list-style:none;padding-right:24px;position:relative}
    summary:after{content:"+";position:absolute;right:0;color:var(--blue);font-size:20px;top:-4px}
    details[open] summary:after{content:"−"}
    details p{font-size:13px;color:var(--muted);margin:12px 0 0}
    .footer-main{background:var(--blue-deep);color:#d7e4fa;padding:54px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.25fr .8fr .8fr 1fr;gap:32px}
    .footer-main h3{color:#fff;font-size:17px;margin-bottom:14px}
    .footer-main p,.footer-main li{font-size:13px;color:#b9cae6}
    .footer-main ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
    .footer-main a:hover{color:#fff}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.16);margin-top:34px;padding-top:17px;font-size:12px;color:#9db2d4}
    .qr{width:112px;background:#fff;padding:5px}
    .floating{position:fixed;right:18px;bottom:22px;z-index:18}
    .floating button{border:0;border-radius:50%;width:58px;height:58px;background:var(--blue);color:#fff;box-shadow:0 8px 22px rgba(18,86,216,.35);font-weight:800;cursor:pointer}
    .contact-pop{display:none;position:absolute;right:0;bottom:70px;width:190px;background:#fff;padding:14px;border:1px solid var(--line);box-shadow:var(--shadow);color:var(--ink);font-size:12px}
    .contact-pop.show{display:block}
    .contact-pop img{width:120px;margin:8px auto}
    .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 5px;font-size:12px}
      .service-grid{grid-template-columns:repeat(3,1fr)}
      .hero-grid{gap:35px}
    }
    @media(max-width:800px){
      .container{width:min(var(--container),calc(100% - 28px))}
      .topbar-inner{justify-content:center;text-align:center}
      .topbar-inner span{display:none}
      .nav-wrap{min-height:65px}
      .brand-name{display:none}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;left:14px;right:14px;top:69px;background:#fff;border:1px solid var(--line);padding:10px;box-shadow:var(--shadow);align-items:stretch}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,1fr)}
      .nav-links a{padding:10px;border-bottom:1px solid #edf2f9}
      .nav-cta{display:none}
      .hero{padding:65px 0 60px}
      .hero-grid,.intro-grid,.solution-grid,.network,.match-grid{grid-template-columns:1fr}
      .hero-panel{max-width:560px}
      .section{padding:62px 0}
      .section-head{display:block}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .process{grid-template-columns:1fr 1fr;gap:10px}
      .process-item{padding:20px 10px 10px 0}
      .process-item:after{display:none}
      .case-grid,.reviews,.article-grid{grid-template-columns:1fr 1fr}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      h1{font-size:37px}
      .hero-metrics,.feature-strip,.service-grid,.case-grid,.reviews,.article-grid,.solution-side,.footer-grid{grid-template-columns:1fr}
      .hero-actions .button{width:100%}
      .process{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .field-full{grid-column:auto}
      .score-box{align-items:flex-start;flex-direction:column;gap:8px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }