:root{--ink:#20241f;--muted:#62675e;--paper:#fffdf5;--yellow:#f6c900;--yellow-soft:#fff4b8;--green:#165c47;--line:#e6e4d9;--white:#fff;--container:1160px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:86px}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Noto Sans SC","Microsoft YaHei",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(--container),calc(100% - 40px));margin-inline:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,253,245,.96);border-bottom:1px solid var(--line);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;font-weight:800;white-space:nowrap}
    .brand img{width:38px;height:auto}
    .nav-links{display:flex;align-items:center;justify-content:flex-end;gap:0;flex-wrap:wrap;font-size:13px;color:#42463e}
    .nav-links a{padding:8px 9px;border-radius:5px}
    .nav-links a:hover{background:var(--yellow-soft)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--ink);border-radius:4px;padding:11px 17px;background:var(--ink);color:#fff;font-weight:700;transition:transform .2s,background .2s,color .2s}
    .nav-cta:hover,.button:hover{transform:translateY(-2px);background:var(--yellow);color:var(--ink)}
    .menu-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:4px;padding:8px 11px;color:var(--ink)}
    .hero{overflow:hidden;background:var(--yellow);position:relative}
    .hero:after{content:"";position:absolute;width:380px;height:380px;border:1px solid rgba(32,36,31,.18);border-radius:50%;right:-105px;top:28px;box-shadow:0 0 0 36px rgba(255,255,255,.1),0 0 0 76px rgba(255,255,255,.08);pointer-events:none}
    .hero-inner{position:relative;z-index:1;padding:72px 0 58px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:13px;letter-spacing:0;color:var(--green)}
    .eyebrow:before{content:"";width:24px;height:2px;background:currentColor}
    h1{max-width:720px;font-size:clamp(40px,7vw,76px);line-height:1.08;margin:19px 0 18px;letter-spacing:0}
    .hero-copy{max-width:650px;color:#30382f;font-size:18px;margin:0}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
    .button-light{background:var(--paper);color:var(--ink);border-color:var(--paper)}
    .hero-meta{display:flex;flex-wrap:wrap;gap:22px;margin-top:36px;font-size:13px;font-weight:700}
    .hero-meta span:before{content:"✓";margin-right:8px;color:var(--green)}
    .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border-bottom:1px solid var(--line)}
    .metric{padding:22px 18px;border-right:1px solid var(--line)}
    .metric:last-child{border-right:0}
    .metric strong{display:block;font-size:22px}
    .metric span{font-size:13px;color:var(--muted)}
    main{overflow:hidden}
    .section{padding:76px 0}
    .section-head{max-width:720px;margin-bottom:32px}
    .section-kicker{font-size:12px;font-weight:800;color:var(--green);text-transform:uppercase}
    h2{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:8px 0 12px;letter-spacing:0}
    h3{font-size:19px;line-height:1.35;margin:0 0 9px;letter-spacing:0}
    .section-head p,.muted{color:var(--muted);margin:0}
    .about-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
    .about-copy p{color:var(--muted)}
    .about-points{display:grid;grid-template-columns:1fr 1fr;gap:16px 22px;margin-top:23px}
    .about-point{padding-top:13px;border-top:2px solid var(--yellow)}
    .about-point strong{display:block;margin-bottom:4px}
    .about-point span{font-size:14px;color:var(--muted)}
    .platform-note{padding:26px;background:var(--green);color:#fff}
    .platform-note p{margin:0;color:#e7f2ec}
    .model-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
    .model-list span{border:1px solid rgba(255,255,255,.36);padding:5px 9px;font-size:12px}
    .service-band{background:#f4f1e5}
    .service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#dcd9ca;border:1px solid #dcd9ca}
    .service-item{background:var(--paper);padding:22px;min-height:150px;transition:background .2s,transform .2s}
    .service-item:hover{background:#fff7cf;transform:translateY(-2px)}
    .service-item p{font-size:14px;color:var(--muted);margin:0}
    .service-item .tag{display:inline-block;color:var(--green);font-size:12px;font-weight:700;margin-bottom:9px}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
    .workflow article{border-top:3px solid var(--yellow);padding:18px 16px 0 0;counter-increment:step}
    .workflow article:before{content:"0" counter(step);display:block;font-size:13px;color:var(--green);font-weight:800;margin-bottom:14px}
    .workflow p{margin:0;color:var(--muted);font-size:14px}
    .industry-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
    .industry-list div{padding:16px;border-left:3px solid var(--yellow);background:#fff}
    .industry-list strong{display:block}
    .industry-list span{font-size:13px;color:var(--muted)}
    .network{background:var(--green);color:#fff}
    .network .section-kicker{color:#f8d944}
    .network .section-head p{color:#deebe4}
    .network-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
    .network-grid article{border-top:1px solid rgba(255,255,255,.32);padding-top:16px}
    .network-grid p{font-size:14px;color:#deebe4;margin:0}
    .comparison{overflow-x:auto;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:720px}
    th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#f5f2e8;font-size:13px}
    td{font-size:14px}
    tr:last-child td{border-bottom:0}
    .score{display:flex;align-items:center;gap:14px;padding:20px 0 24px}
    .score strong{font-size:32px}
    .stars{color:#c18d00;letter-spacing:0}
    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .case{background:#fff;border:1px solid var(--line);padding:12px}
    .case img{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}
    .case h3{margin:14px 4px 5px}
    .case p{margin:0 4px 7px;color:var(--muted);font-size:14px}
    .square-case{display:grid;grid-template-columns:160px 1fr;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);padding:14px;margin-top:18px}
    .square-case img{width:100%;aspect-ratio:1;object-fit:cover}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{padding:19px;background:#fff;border-top:2px solid var(--yellow)}
    .review p{font-size:14px;color:#43483f;margin:0 0 14px}
    .review strong{font-size:13px}
    .review span{display:block;color:var(--muted);font-size:12px}
    .articles{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .articles a{background:#fff;padding:17px;border:1px solid var(--line);font-weight:700;font-size:14px;transition:border .2s,transform .2s}
    .articles a:hover{border-color:var(--green);transform:translateY(-2px)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .tag-cloud span{padding:7px 11px;background:#fff;border:1px solid var(--line);font-size:13px}
    .faq-list{border-top:1px solid var(--line)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-item summary{cursor:pointer;list-style:none;padding:17px 34px 17px 0;font-weight:700;position:relative}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";position:absolute;right:5px;top:14px;font-size:22px;color:var(--green)}
    .faq-item[open] summary:after{content:"−"}
    .faq-item p{margin:0;padding:0 30px 18px 0;color:var(--muted);font-size:14px}
    .contact-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:40px;align-items:start}
    .contact-info{padding:22px 0}
    .contact-info p{color:var(--muted)}
    .contact-links{display:grid;gap:10px;margin-top:18px}
    .contact-links a{color:var(--green);font-weight:700}
    .contact-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;background:#fff;padding:22px;border:1px solid var(--line)}
    .field{display:grid;gap:6px}
    .field-full{grid-column:1/-1}
    .field label{font-size:13px;font-weight:700}
    .field input,.field select,.field textarea{width:100%;border:1px solid #d8d7cd;border-radius:3px;padding:11px 12px;background:#fff;color:var(--ink)}
    .field textarea{min-height:110px;resize:vertical}
    .form-submit{grid-column:1/-1;justify-self:start;cursor:pointer}
    .join-strip{padding:28px;background:var(--yellow);display:flex;align-items:center;justify-content:space-between;gap:20px}
    .join-strip p{margin:4px 0 0;color:#414536}
    .site-footer{background:#20241f;color:#f4f2e9;padding:30px 0}
    .footer-row{display:flex;justify-content:space-between;align-items:flex-start;gap:24px}
    .footer-row p{margin:6px 0;color:#d1d2c8;font-size:13px}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13px;color:#f0dc6b}
    .footer-bottom{border-top:1px solid #44483f;margin-top:20px;padding-top:14px;font-size:12px;color:#c6c8be}
    .float-contact{position:fixed;right:18px;bottom:20px;z-index:15;display:grid;gap:8px}
    .float-contact a{display:grid;place-items:center;min-width:48px;min-height:46px;padding:8px;background:var(--green);color:#fff;font-weight:700;font-size:12px;border:1px solid rgba(255,255,255,.4);box-shadow:0 4px 14px rgba(0,0,0,.14)}
    .float-contact a:hover{background:var(--yellow);color:var(--ink)}
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s,transform .55s}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:900px){
      .nav-row{flex-wrap:wrap;padding:12px 0}
      .menu-toggle{display:block;margin-left:auto}
      .nav-cta{display:none}
      .nav-links{display:none;flex-basis:100%;justify-content:flex-start}
      .nav-links.open{display:flex}
      .nav-links a{padding:8px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .articles{grid-template-columns:repeat(3,1fr)}
    }
    @media(max-width:650px){
      .container{width:min(var(--container),calc(100% - 30px))}
      .hero-inner{padding:56px 0 40px}
      .hero-copy{font-size:16px}
      .metrics{grid-template-columns:1fr 1fr}
      .metric:nth-child(2){border-right:0}
      .metric:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .section{padding:54px 0}
      .about-layout,.contact-layout{grid-template-columns:1fr;gap:24px}
      .about-points{gap:14px}
      .service-grid,.industry-list{grid-template-columns:1fr 1fr}
      .workflow{grid-template-columns:1fr 1fr;gap:24px 16px}
      .network-grid{grid-template-columns:1fr;gap:18px}
      .case-grid{grid-template-columns:1fr}
      .square-case{grid-template-columns:100px 1fr}
      .reviews{grid-template-columns:1fr 1fr}
      .articles{grid-template-columns:1fr 1fr}
      .contact-form{grid-template-columns:1fr;padding:17px}
      .field-full,.form-submit{grid-column:auto}
      .join-strip,.footer-row{align-items:flex-start;flex-direction:column}
      .float-contact{right:10px;bottom:10px}
      .float-contact a{min-width:42px;min-height:42px}
    }
    @media(max-width:390px){
      .reviews,.industry-list{grid-template-columns:1fr}
      .brand img{width:32px}
      .hero-meta{gap:10px}
      .square-case{grid-template-columns:1fr}
      .square-case img{max-width:150px}
    }
    @media(prefers-reduced-motion:reduce){
      *,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
      .reveal{opacity:1;transform:none}
    }