:root{--ink:#17233a;--muted:#59677c;--line:#dfe6f1;--paper:#f7f9ff;--white:#fff;--blue:#315ee8;--cyan:#12aeb5;--pink:#ef5b91;--lime:#d9f46c;--shadow:0 16px 44px rgba(28,54,105,.09);--wrap:1160px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:90px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    button,input,select,textarea{font:inherit}
    img{max-width:100%;height:auto}
    .container{width:min(var(--wrap),calc(100% - 40px));margin-inline:auto}
    .topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(223,230,241,.85);backdrop-filter:blur(16px)}
    .nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:11px;flex:none;font-weight:800}
    .ai-page-logo{display:block;width:42px;max-width:100%;height:auto}
    .brand-name{font-size:17px}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:13px;color:#47556c;padding:9px 10px;border-radius:6px;transition:background .2s,color .2s}
    .nav-links a:hover{background:#eef2ff;color:var(--blue)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:6px;padding:12px 19px;background:var(--blue);color:#fff;font-weight:700;box-shadow:0 8px 20px rgba(49,94,232,.2);transition:transform .2s,box-shadow .2s,background .2s}
    .nav-cta:hover,.button:hover{transform:translateY(-2px);box-shadow:0 12px 25px rgba(49,94,232,.27);background:#234bd0}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:6px;padding:8px 11px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:linear-gradient(118deg,#e8efff 0%,#f6f9ff 48%,#e5fbf6 100%);border-bottom:1px solid #e2e9f6}
    .hero:before,.hero:after{content:"";position:absolute;pointer-events:none}
    .hero:before{width:320px;height:320px;right:-90px;top:-140px;border:1px solid rgba(49,94,232,.17);border-radius:50%;box-shadow:0 0 0 35px rgba(49,94,232,.035),0 0 0 70px rgba(18,174,181,.035)}
    .hero:after{width:140px;height:140px;right:16%;bottom:-100px;border:1px solid rgba(18,174,181,.27);transform:rotate(35deg)}
    .hero-inner{position:relative;z-index:1;padding:76px 0 42px}
    .hero-copy{max-width:780px}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:#3051bd;font-size:13px;font-weight:800}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--pink)}
    h1{max-width:760px;margin:17px 0 16px;font-size:clamp(38px,6vw,68px);line-height:1.12;letter-spacing:0;font-weight:850}
    .hero-copy p{max-width:660px;margin:0;color:#4c5c73;font-size:17px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:27px}
    .button.secondary{color:var(--ink);background:#fff;border:1px solid #d7dfed;box-shadow:none}
    .button.secondary:hover{background:#f1f5ff}
    .hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
    .hero-tags span{border:1px solid #cfdaef;border-radius:4px;padding:5px 10px;background:rgba(255,255,255,.56);color:#44536c;font-size:12px}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:54px;border-top:1px solid rgba(60,87,143,.17)}
    .metric{padding:20px 18px 4px 0}
    .metric strong{display:block;font-size:17px}
    .metric span{color:var(--muted);font-size:13px}
    main{overflow:hidden}
    .section{padding:76px 0}
    .section.tint{background:#eff4ff;border-block:1px solid #e3eaf7}
    .section.white{background:#fff}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:30px}
    .section-head h2{margin:7px 0 0;font-size:clamp(26px,4vw,38px);line-height:1.2;letter-spacing:0}
    .section-head p{max-width:520px;margin:0;color:var(--muted)}
    .kicker{color:#4160c6;font-size:12px;font-weight:800;text-transform:uppercase}
    .intro-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:start}
    .intro-grid p{margin:0 0 16px;color:#4c5a70}
    .intro-points{display:grid;grid-template-columns:1fr 1fr;gap:14px 24px}
    .intro-point{padding:14px 0;border-top:1px solid var(--line)}
    .intro-point strong{display:block;margin-bottom:4px}
    .intro-point span{font-size:13px;color:var(--muted)}
    .model-strip{padding:23px 25px;background:#17233a;color:#fff;border-radius:6px}
    .model-strip h3{margin:0 0 14px;font-size:17px}
    .model-strip p{margin:0;color:#dce5f7;font-size:13px}
    .model-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:15px}
    .model-tags span{padding:5px 9px;border:1px solid rgba(255,255,255,.22);border-radius:4px;color:#f1f4fb;font-size:12px}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .service{padding:22px 21px 20px;border:1px solid var(--line);border-radius:6px;background:#fff;transition:transform .2s,box-shadow .2s,border-color .2s}
    .service:hover,.review:hover,.case:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9c9f5}
    .service .num{font-size:11px;font-weight:800;color:#5270d7}
    .service h3{margin:8px 0;font-size:18px}
    .service p{margin:0;color:var(--muted);font-size:14px}
    .service em{display:block;margin-top:13px;color:#28747a;font-size:12px;font-style:normal;font-weight:700}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
    .step{position:relative;padding:14px 22px 12px 0}
    .step:not(:last-child):after{content:"";position:absolute;top:29px;left:42px;right:17px;height:1px;background:#cbd6e9}
    .step b{position:relative;z-index:1;display:grid;place-items:center;width:30px;height:30px;background:var(--blue);color:#fff;border-radius:50%;font-size:13px}
    .step h3{margin:14px 0 5px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:13px}
    .split-list{display:grid;grid-template-columns:1fr 1fr;gap:34px}
    .solution{padding:23px 0;border-top:2px solid #355ee2}
    .solution:nth-child(2){border-color:#12aeb5}
    .solution h3{margin:0 0 8px;font-size:20px}
    .solution p{margin:0;color:var(--muted)}
    .solution ul{padding-left:19px;margin:13px 0 0;color:#46556b}
    .solution li{padding:3px 0}
    .network{display:flex;align-items:center;justify-content:space-between;gap:35px;padding:29px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .network strong{font-size:20px}
    .network p{max-width:610px;margin:0;color:var(--muted)}
    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .case{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:6px;transition:transform .2s,box-shadow .2s}
    .media{overflow:hidden;background:#e9eef8;aspect-ratio:16/8}
    .media img{display:block;width:100%;height:100%;object-fit:cover}
    .case-body{padding:19px 21px 21px}
    .case-body h3{margin:0 0 7px;font-size:18px}
    .case-body p{margin:0;color:var(--muted);font-size:14px}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{padding:19px;border:1px solid var(--line);border-radius:6px;background:#fff;transition:transform .2s,box-shadow .2s}
    .stars{color:#e1a316;letter-spacing:0}
    .review p{margin:11px 0 16px;color:#48566d;font-size:14px}
    .review strong{font-size:13px}
    .review small{display:block;color:var(--muted);font-size:12px}
    .comparison{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
    table{width:100%;min-width:720px;border-collapse:collapse;text-align:left}
    th,td{padding:14px 17px;border-bottom:1px solid #e8edf5;font-size:14px}
    thead th{background:#edf2ff;color:#24385d;font-weight:800}
    tbody tr:last-child td{border-bottom:0}
    td:first-child{font-weight:700}
    .scoreline{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px;padding:18px 20px;border-left:4px solid var(--pink);background:#fff}
    .scoreline strong{font-size:18px}
    .scoreline span{color:#9b6500;font-weight:800}
    .match-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:start}
    .match-copy h2{margin:7px 0 14px;font-size:34px;line-height:1.2}
    .match-copy p{color:var(--muted)}
    .match-copy a{color:var(--blue);font-weight:700}
    form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:6px}
    .field.full{grid-column:1/-1}
    label{font-size:13px;font-weight:700}
    input,select,textarea{width:100%;padding:11px 12px;border:1px solid #ccd6e6;border-radius:5px;background:#fff;color:var(--ink);outline:none}
    input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(49,94,232,.12)}
    textarea{min-height:110px;resize:vertical}
    form .button{justify-self:start;cursor:pointer}
    .faq-list{max-width:900px}
    details{border-bottom:1px solid var(--line)}
    details:first-child{border-top:1px solid var(--line)}
    summary{position:relative;cursor:pointer;list-style:none;padding:17px 35px 17px 0;font-weight:700}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:4px;top:14px;color:var(--blue);font-size:22px;font-weight:400;transition:transform .2s}
    details[open] summary:after{transform:rotate(45deg)}
    details p{margin:0;padding:0 35px 17px 0;color:var(--muted);font-size:14px}
    .article-links{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .article-link{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:15px;border:1px solid var(--line);border-radius:5px;background:#fff;font-size:13px;font-weight:700;transition:border-color .2s,transform .2s}
    .article-link:hover{transform:translateY(-2px);border-color:#92a9ec}
    .subsection{margin-top:33px}
    .subsection h3{font-size:18px}
    .link-cloud{display:flex;flex-wrap:wrap;gap:9px}
    .link-cloud a{padding:7px 10px;border:1px solid #d9e1ee;border-radius:4px;background:#fff;color:#43536b;font-size:13px}
    .join-band{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 26px;background:#e8f8f6;border-left:4px solid var(--cyan)}
    .join-band h3{margin:0 0 4px;font-size:19px}
    .join-band p{margin:0;color:var(--muted);font-size:14px}
    footer{background:#eaf0fa;color:#24334d;border-top:1px solid #d8e1ef}
    .footer-main{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:34px;padding:36px 0 27px}
    .footer-main h2,.footer-main h3{margin:0 0 11px;font-size:16px}
    .footer-main p{margin:5px 0;color:#536178;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 14px}
    .footer-links a{font-size:13px;color:#3854a4}
    .qr{width:112px;padding:5px;background:#fff;border:1px solid #d4deec;border-radius:4px}
    .copyright{padding:14px 0;border-top:1px solid #d5deeb;color:#56647a;font-size:12px}
    .floating{position:fixed;right:18px;bottom:18px;z-index:15;display:flex;flex-direction:column;gap:8px}
    .floating a,.floating button{display:grid;place-items:center;width:46px;height:46px;border:1px solid #dbe3f0;border-radius:6px;background:#fff;color:#24334d;box-shadow:0 6px 22px rgba(30,52,93,.13);font-size:12px;font-weight:800;cursor:pointer}
    .floating a:hover,.floating button:hover{background:#edf2ff;color:var(--blue)}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease}
    .reveal.visible{opacity:1;transform:translateY(0)}
    @media(max-width:900px){
      .nav-links{gap:0}.nav-links a{padding:8px 6px;font-size:12px}
      .nav-cta{padding:10px 12px;font-size:13px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .article-links{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:720px){
      .container{width:min(var(--wrap),calc(100% - 32px))}
      .nav{min-height:66px;flex-wrap:wrap;gap:10px}
      .menu-toggle{display:inline-flex;align-items:center;gap:7px;margin-left:auto}
      .nav-cta{display:none}
      .nav-links{display:none;order:3;width:100%;padding:0 0 12px;justify-content:flex-start;align-items:stretch}
      .nav-links.open{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
      .nav-links a{padding:10px 9px;font-size:13px}
      .hero-inner{padding:57px 0 31px}
      h1{font-size:42px}
      .hero-copy p{font-size:15px}
      .metrics{grid-template-columns:repeat(2,1fr);margin-top:38px}
      .metric{padding:16px 10px 5px 0}
      .section{padding:55px 0}
      .section-head{display:block}
      .section-head p{margin-top:11px}
      .intro-grid,.split-list,.match-grid{grid-template-columns:1fr;gap:25px}
      .service-grid{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr 1fr;gap:20px 8px}
      .step:not(:last-child):after{display:none}
      .network{align-items:flex-start;flex-direction:column;gap:8px}
      .case-grid,.review-grid{grid-template-columns:1fr}
      .article-links{grid-template-columns:1fr 1fr}
      .footer-main{grid-template-columns:1fr 1fr}
      .footer-main section:first-child{grid-column:1/-1}
      .join-band{align-items:flex-start;flex-direction:column}
      .scoreline{align-items:flex-start;flex-direction:column;gap:4px}
    }
    @media(max-width:430px){
      .hero-actions .button{width:100%}
      .intro-points{grid-template-columns:1fr}
      .workflow{grid-template-columns:1fr}
      .article-links{grid-template-columns:1fr}
      .footer-main{grid-template-columns:1fr}
      .footer-main section:first-child{grid-column:auto}
      form{grid-template-columns:1fr}
      .field.full{grid-column:auto}
      .floating{right:10px;bottom:10px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }