:root{--ink:#20252c;--muted:#626a73;--paper:#fffaf2;--white:#fff;--line:#e8e1d7;--coral:#ef634b;--teal:#087e78;--blue:#3769bf;--yellow:#ffd45a;--pink:#f4bad1;--green:#b8e6c7;--shadow:0 12px 35px rgba(45,44,39,.08)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto}
    button,input,select,textarea{font:inherit}
    button,a{touch-action:manipulation}
    .container{width:min(1160px,calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,250,242,.96);border-bottom:1px solid rgba(32,37,44,.09);backdrop-filter:blur(12px)}
    .nav-row{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .brand{display:flex;align-items:center;gap:10px;flex:none}
    .ai-page-logo{width:42px;height:42px;object-fit:contain}
    .brand-name{font-weight:850;font-size:18px;line-height:1.15}
    .brand-name small{display:block;color:var(--muted);font-size:10px;font-weight:650;letter-spacing:0;margin-top:3px}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap}
    .nav-links a{font-size:12px;color:#414850;padding:7px 8px;border-radius:6px}
    .nav-links a:hover{background:#f4e8d9;color:var(--ink)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:6px;padding:11px 17px;font-weight:750;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s}
    .nav-cta,.button-primary{background:var(--coral);color:#fff;box-shadow:0 5px 0 #c94a38}
    .nav-cta:hover,.button-primary:hover{transform:translateY(-2px);box-shadow:0 7px 0 #c94a38}
    .button-secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}
    .button-secondary:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:6px;color:var(--ink);font-size:20px}
    main{overflow:hidden}
    .hero{position:relative;padding:68px 0 52px;background-color:#ffe7c3;background-image:radial-gradient(circle at 12% 24%,rgba(239,99,75,.13) 0 3px,transparent 4px),radial-gradient(circle at 88% 70%,rgba(8,126,120,.15) 0 4px,transparent 5px);background-size:31px 31px,43px 43px}
    .hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);align-items:center;gap:42px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:800;color:#414850;text-transform:uppercase}
    .eyebrow:before{content:"";width:24px;height:3px;background:var(--teal)}
    h1{max-width:650px;margin:16px 0;font-size:clamp(38px,5vw,66px);line-height:1.08;letter-spacing:0}
    .hero-copy{max-width:610px;color:#434950;font-size:17px;margin:0 0 24px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .hero-note{margin-top:20px;font-size:12px;color:#565c62}
    .hero-art{position:relative;min-height:305px;display:grid;place-items:center}
    .scribble-frame{width:min(100%,390px);padding:24px;background:#fffdf8;border:2px solid var(--ink);border-radius:8px;box-shadow:12px 12px 0 var(--teal);transform:rotate(1deg)}
    .scribble-frame h2{font-size:20px;margin:0 0 18px}
    .flow-line{display:grid;grid-template-columns:1fr 28px 1fr;align-items:center;gap:8px;margin:13px 0}
    .flow-chip{padding:10px 9px;text-align:center;border:1px solid var(--ink);border-radius:6px;font-size:13px;font-weight:750;background:#fff}
    .flow-chip.coral{background:#ffe0d7}
    .flow-chip.green{background:#ddf3df}
    .flow-arrow{text-align:center;color:var(--coral);font-size:19px;font-weight:900}
    .scribble-foot{display:flex;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px dashed #aaa;font-size:12px;color:var(--muted)}
    .burst{position:absolute;width:66px;height:66px;top:12px;right:1%;background:var(--yellow);border:2px solid var(--ink);border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:900;transform:rotate(10deg)}
    .metrics{position:relative;margin-top:-1px;background:var(--ink);color:#fff;padding:23px 0}
    .metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .metric{padding:4px 18px;border-left:2px solid var(--coral)}
    .metric strong{display:block;font-size:20px;color:#fff}
    .metric span{color:#d4d6d8;font-size:12px}
    .section{padding:70px 0}
    .section-tint{background:#f6eee3}
    .section-white{background:#fff}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
    .section-head h2{margin:0;font-size:clamp(27px,3vw,39px);line-height:1.2;letter-spacing:0}
    .section-head p{max-width:530px;margin:0;color:var(--muted);font-size:14px}
    .kicker{display:block;color:var(--teal);font-size:11px;font-weight:850;margin-bottom:8px}
    .intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start}
    .intro-grid p{margin:0 0 15px;color:#4d555e}
    .text-rule{padding:16px 18px;border-left:4px solid var(--coral);background:#fff;font-weight:700}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .tag{border:1px solid #cbc7bf;background:#fff;padding:6px 10px;font-size:12px;border-radius:4px;color:#333b42}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .service-item{background:#fff;border:1px solid var(--line);border-top:4px solid var(--teal);padding:18px;border-radius:6px;transition:transform .2s,box-shadow .2s}
    .service-item:nth-child(3n+2){border-top-color:var(--coral)}
    .service-item:nth-child(3n){border-top-color:#e2a900}
    .service-item:hover,.case:hover,.quote:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .service-item h3{margin:0 0 7px;font-size:16px}
    .service-item p{margin:0;color:var(--muted);font-size:13px}
    .service-item .mini{display:inline-block;margin-top:12px;color:var(--teal);font-size:11px;font-weight:800}
    .workflow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:step}
    .step{position:relative;padding:17px 16px 17px 0;border-top:2px solid var(--ink);counter-increment:step}
    .step:before{content:"0" counter(step);display:block;color:var(--coral);font-size:13px;font-weight:900;margin-bottom:14px}
    .step:not(:last-child):after{content:"";position:absolute;top:-5px;right:0;width:8px;height:8px;border-radius:50%;background:var(--coral)}
    .step h3{font-size:15px;margin:0 0 6px}
    .step p{font-size:12px;color:var(--muted);margin:0;padding-right:10px}
    .industry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .industry{padding:16px;background:#fff;border:1px solid var(--line);border-radius:6px}
    .industry strong{display:block;margin-bottom:5px;font-size:14px}
    .industry span{font-size:12px;color:var(--muted)}
    .network-band{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:34px}
    .network-band h2{font-size:31px;line-height:1.2;margin:0 0 14px}
    .network-band p{color:var(--muted);margin:0}
    .network-points{display:grid;grid-template-columns:1fr 1fr;gap:10px}
    .network-point{padding:14px;background:#fff;border-left:3px solid var(--teal);font-size:13px;font-weight:700}
    .media-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .media-panel{overflow:hidden;border-radius:6px;background:#fff;border:1px solid var(--line)}
    .media-panel img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
    .media-caption{padding:13px 15px;font-size:13px;font-weight:750}
    .square-media{display:grid;grid-template-columns:220px 1fr;gap:22px;align-items:center;margin-top:18px}
    .square-media img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:6px}
    .square-media p{color:var(--muted);font-size:14px}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .case{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:6px;transition:transform .2s,box-shadow .2s}
    .case img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
    .case-body{padding:15px}
    .case-body span{font-size:11px;color:var(--teal);font-weight:800}
    .case-body h3{font-size:16px;margin:5px 0}
    .case-body p{font-size:12px;color:var(--muted);margin:0}
    .comparison{display:grid;grid-template-columns:.75fr 1.25fr;gap:25px;align-items:start}
    .score-panel{background:var(--yellow);border:2px solid var(--ink);padding:24px;border-radius:6px}
    .score-panel .score{font-size:52px;font-weight:900;line-height:1}
    .stars{color:#8c5d00;font-size:22px;letter-spacing:0;margin:7px 0}
    .score-panel p{margin:9px 0 0;font-size:13px}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:650px}
    th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);font-size:12px}
    th{background:#f2eee7;font-weight:850}
    tr:last-child td{border-bottom:0}
    td:first-child{font-weight:750}
    .good{color:#087e58;font-weight:800}
    .match-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:start}
    .match-copy{padding:22px 0}
    .match-copy h2{font-size:34px;line-height:1.2;margin:0 0 14px}
    .match-copy p{color:var(--muted)}
    .match-list{padding-left:19px;color:#46505a;font-size:14px}
    .match-list li{margin:8px 0}
    .form-panel{padding:22px;background:#fff;border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:13px}
    .field{display:flex;flex-direction:column;gap:6px}
    .field.full{grid-column:1/-1}
    .field label{font-size:12px;font-weight:750}
    .field input,.field select,.field textarea{width:100%;border:1px solid #cbc7bf;border-radius:4px;padding:10px 11px;background:#fff;color:var(--ink)}
    .field textarea{min-height:108px;resize:vertical}
    .form-panel .button{margin-top:14px;width:100%}
    .quotes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
    .quote{background:#fff;border:1px solid var(--line);padding:17px;border-radius:6px;transition:transform .2s,box-shadow .2s}
    .quote p{font-size:13px;color:#434b53;margin:0 0 14px}
    .quote strong{font-size:12px}
    .quote span{display:block;color:var(--muted);font-size:11px}
    .faq-list{max-width:900px;margin:0 auto;border-top:1px solid var(--line)}
    details{border-bottom:1px solid var(--line);padding:0 4px}
    summary{cursor:pointer;list-style:none;padding:16px 28px 16px 0;font-size:14px;font-weight:750;position:relative}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:2px;top:13px;font-size:22px;color:var(--coral)}
    details[open] summary:after{content:"−"}
    details p{margin:0;padding:0 24px 16px 0;color:var(--muted);font-size:13px}
    .article-list{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
    .article-link{display:flex;flex-direction:column;justify-content:space-between;min-height:118px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:5px}
    .article-link strong{font-size:13px}
    .article-link span{font-size:11px;color:var(--teal);font-weight:750}
    .join-band{display:flex;justify-content:space-between;align-items:center;gap:22px;padding:24px 0;border-top:1px solid var(--line)}
    .join-band h2{font-size:23px;margin:0}
    .join-band p{margin:4px 0 0;color:var(--muted);font-size:13px}
    .site-footer{background:#20252c;color:#f7f4ed;padding:34px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:30px}
    .site-footer h2,.site-footer h3{margin:0 0 12px;font-size:15px;color:#fff}
    .site-footer p,.site-footer a,.site-footer span{color:#d9dce0;font-size:12px}
    .site-footer a:hover{color:#ffd45a}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 14px}
    .contact-list{display:grid;gap:5px}
    .qr-row{display:flex;align-items:center;gap:12px;margin-top:10px}
    .qr-row img{width:82px;height:82px;object-fit:cover;background:#fff;border-radius:4px}
    .copyright{margin-top:24px;padding-top:15px;border-top:1px solid #464b51;color:#c4c9ce;font-size:11px}
    .float-help{position:fixed;right:18px;bottom:20px;z-index:18}
    .float-help a{display:block;background:var(--teal);color:#fff;padding:12px 14px;border-radius:6px;box-shadow:0 5px 16px rgba(0,0,0,.2);font-size:12px;font-weight:800}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s ease}
    .reveal.is-visible{opacity:1;transform:none}
    @media(max-width:900px){
      .nav-links{display:none;position:absolute;top:72px;left:20px;right:20px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:6px;box-shadow:var(--shadow);justify-content:flex-start}
      .nav-links.open{display:flex}
      .nav-links a{padding:8px 10px}
      .menu-toggle{display:block;margin-left:auto}
      .nav-cta{padding:10px 12px;font-size:12px}
      .hero-grid{gap:20px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .industry-grid{grid-template-columns:repeat(2,1fr)}
      .article-list{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 30px,1160px)}
      .nav-row{min-height:64px;gap:10px}
      .nav-links{top:64px;left:15px;right:15px}
      .brand-name{font-size:16px}
      .ai-page-logo{width:36px;height:36px}
      .hero{padding:46px 0 35px}
      .hero-grid,.intro-grid,.network-band,.comparison,.match-layout{grid-template-columns:1fr}
      .hero-grid{gap:14px}
      h1{font-size:42px}
      .hero-copy{font-size:15px}
      .hero-art{min-height:250px}
      .scribble-frame{width:calc(100% - 28px);padding:18px}
      .burst{right:0;top:0}
      .metrics-grid{grid-template-columns:1fr 1fr;gap:15px}
      .metric{padding-left:12px}
      .section{padding:49px 0}
      .section-head{display:block}
      .section-head p{margin-top:10px}
      .workflow{grid-template-columns:1fr;gap:0}
      .step{padding:13px 0 15px 34px;border-top:0;border-left:2px solid var(--ink)}
      .step:before{position:absolute;left:-1px;top:13px;transform:translateX(-50%);background:var(--paper);padding:2px 0}
      .step:not(:last-child):after{top:auto;left:-5px;right:auto;bottom:-4px}
      .section-white .step:before{background:#fff}
      .section-tint .step:before{background:#f6eee3}
      .service-grid,.case-grid,.quotes-grid{grid-template-columns:1fr}
      .network-points{grid-template-columns:1fr 1fr}
      .media-grid{grid-template-columns:1fr}
      .square-media{grid-template-columns:130px 1fr;gap:14px}
      .article-list{grid-template-columns:1fr 1fr}
      .form-grid{grid-template-columns:1fr}
      .field.full{grid-column:auto}
      .join-band{align-items:flex-start;flex-direction:column}
      .footer-grid{grid-template-columns:1fr;gap:22px}
      .float-help{right:12px;bottom:12px}
      .float-help a{padding:10px 12px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }