:root{--paper:#f5f3ee;--ink:#202820;--muted:#60695b;--line:#cdd3c5;--accent:#963b25;--card:#fafaf6;--deep:#253327}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 Arial,"Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
header,footer{max-width:1400px;margin:auto;padding:28px 5%;display:flex;justify-content:space-between;gap:28px;border-bottom:1px solid var(--line)}
header{background:#f5f3eef5;position:sticky;top:0;z-index:9;backdrop-filter:blur(6px)}
.brand{display:flex;align-items:center;gap:12px;font-size:24px;font-weight:700;line-height:1.3}
.brand img{width:48px;height:48px;object-fit:contain}
.brand small{display:block;font-size:10px;letter-spacing:2.5px;margin-top:6px;font-weight:400}
nav{display:flex;align-items:center;gap:28px;font-size:13px}
nav a:last-child{color:var(--accent)}
nav a[aria-current=page]{color:var(--accent);text-decoration:underline;text-underline-offset:8px}
.language-switch a{font-size:12px;color:var(--muted)}
main{max-width:1280px;margin:auto;padding:0 32px}
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:65px;align-items:center;padding:76px 0}
.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--accent);margin:0}
h1{font-size:clamp(38px,5vw,68px);line-height:1.2;font-weight:500;letter-spacing:-2px;margin:22px 0}
h1 em,.specialist-hero em{font-style:normal;color:var(--accent)}
h2{font-size:32px;font-weight:500;line-height:1.4;margin:14px 0}
h3{font-size:22px;font-weight:500;line-height:1.5;margin:10px 0}
p{color:var(--muted)}
.lede{max-width:600px;font-size:17px}
.actions{display:flex;flex-wrap:wrap;gap:18px;align-items:center;margin-top:30px}
.button{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:12px 22px;border:1px solid var(--ink);border-radius:4px;background:var(--ink);color:#fff;cursor:pointer;font-size:15px}
.secondary{background:transparent;color:var(--ink)}
.text-link{border-bottom:1px solid #a8b09f;padding:8px 0;font-size:14px}
.hero-foot{display:flex;gap:24px;border-top:1px solid var(--line);padding-top:20px;margin-top:32px;font-size:12px;color:var(--muted);flex-wrap:wrap}
.lab{margin:0;align-self:stretch;position:relative;background:#e9ede3;border:1px solid var(--line);border-radius:8px;padding:24px;display:flex;flex-direction:column}
.lab .caption{display:flex;justify-content:space-between;font-size:10px;letter-spacing:1px;color:var(--muted);margin-bottom:12px}
.lab svg{display:block;width:100%;height:auto;flex:1}
.lab figcaption{margin-top:14px;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;gap:10px;border-top:1px solid var(--line);padding-top:12px}
.lab figcaption strong{color:var(--ink);font-weight:500}
section{padding:48px 0}
.service-rail{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid var(--line);margin-bottom:28px}
.service-rail a{padding:26px 22px;display:flex;align-items:center;gap:18px;border-right:1px solid var(--line)}
.service-rail a:last-child{border-right:0}
.service-rail a:hover{background:#e9eddf}
.service-rail a>span{color:var(--accent);font-family:Georgia,serif;font-style:italic;font-size:20px}
.service-rail strong{font-size:16px;font-weight:500}
.service-rail small{display:block;font-size:11px;color:var(--muted);margin-top:4px}
.service-rail b{margin-left:auto;font-weight:400;color:var(--accent)}
.section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:28px}
.section-head p{max-width:380px;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{display:block;border:1px solid var(--line);border-radius:6px;padding:28px;background:var(--card)}
a.card:hover{background:#e9eddf}
.card p{font-size:14px}
.card .arrow{color:var(--accent);display:block;margin-top:28px;font-size:14px}
.number{font:italic 22px Georgia,serif;color:var(--accent)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:14px 0}
.chips span{font-size:10px;border:1px solid var(--line);padding:4px 7px;color:var(--muted);background:var(--paper)}
.tag{display:inline-block;font-size:11px;color:var(--accent);border:1px solid var(--line);padding:4px 10px;border-radius:99px}
.band{background:var(--deep);color:var(--paper);padding:48px;margin:45px 0;border-radius:8px}
.band p{color:#cbd3c4}
.band .eyebrow{color:#d9b8a5}
.band .button{background:var(--paper);color:var(--deep);border-color:var(--paper)}
.engineering{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:center}
.stack{display:grid;align-content:center;gap:12px}
.stack>div{border:1px solid #617058;padding:20px 16px;font-size:13px;background:#31412f;border-radius:4px;display:flex;gap:16px;align-items:baseline}
.stack>div:hover{background:#3a4c38}
.stack span{color:#dfb8a4;font-family:Georgia,serif;font-style:italic;font-size:16px;white-space:nowrap}
.stack strong{font-weight:500;font-size:15px}
.stack small{display:block;color:#a9b5a4;font-size:11px;margin-top:2px}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.flow .card{counter-increment:step;padding-top:56px;position:relative}
.flow .card::before{content:"0" counter(step);position:absolute;top:20px;left:28px;font:italic 26px Georgia,serif;color:var(--accent)}
.flow .card small{display:block;font-size:10px;letter-spacing:2px;color:var(--muted);text-transform:uppercase;margin-bottom:6px}
.faq{display:grid;gap:0;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{cursor:pointer;font-size:17px;font-weight:500;list-style:none;display:flex;justify-content:space-between;gap:20px;align-items:baseline}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:22px;font-weight:400;flex:none}
.faq details[open] summary::after{content:"–"}
.faq p{max-width:760px;margin:12px 0 0;font-size:14px}
.start-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.start-grid .card{display:flex;flex-direction:column}
.start-grid .card .arrow{margin-top:auto}
.closing{text-align:center;padding:65px 20px;background:#e8ecdf;border-radius:8px}
.closing h2{font-size:40px;margin:0 0 10px}
.closing p{margin:0 auto 26px;max-width:560px}
footer{margin-top:60px;border-top:1px solid var(--line);border-bottom:0;font-size:12px;display:grid;grid-template-columns:1.2fr .8fr 1fr;max-width:1280px;text-align:left}
footer p{font-size:12px}
footer strong{font-size:14px}
footer .col{display:flex;flex-direction:column;gap:6px}
.legal{border-top:1px solid var(--line);padding:18px 5%;max-width:1400px;margin:auto;font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:1000px){.engineering{grid-template-columns:1fr;gap:30px}.flow{grid-template-columns:repeat(2,1fr)}.service-rail a{padding:20px 10px}}
@media(max-width:780px){header{flex-wrap:wrap;padding:22px}nav{width:100%;gap:16px;flex-wrap:wrap;font-size:12px}main{padding:0 20px}.hero{grid-template-columns:1fr;gap:30px;padding:40px 0}h1{font-size:44px}.grid,.two,.flow,.start-grid,.engineering{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:10px}section{padding:30px 0}.card{padding:23px}.band{padding:26px 22px;margin:20px 0}.closing h2{font-size:31px}.closing{padding:40px 18px}footer{grid-template-columns:1fr;gap:24px}.button{font-size:14px}h2{font-size:27px}.service-rail{grid-template-columns:1fr}.service-rail a{border-right:0;border-bottom:1px solid var(--line)}.service-rail a:last-child{border-bottom:0}.lab{max-width:520px}}

/* ---- detail pages ---- */
.detail{max-width:920px;padding:40px 0}
.detail h1{font-size:clamp(36px,4.5vw,56px)}
.breadcrumb{font-size:12px;margin:26px 0 0;color:var(--muted)}
.breadcrumb a{border-bottom:1px solid #a8b09f}
.svc{display:grid;grid-template-columns:200px 1fr;gap:40px;padding:44px 0;border-top:1px solid var(--line)}
.svc:first-of-type{border-top:0;padding-top:8px}
.svc-side .number{font-size:44px;display:block;line-height:1}
.svc-side small{display:block;font-size:10px;letter-spacing:2px;color:var(--muted);margin-top:10px}
.svc h2{font-size:26px;margin:0 0 12px}
.svc ul{padding-left:20px;color:var(--muted);font-size:14px;margin:14px 0}
.svc li{margin:8px 0}
.svc-note{font-size:13px;border-left:2px solid var(--accent);padding:4px 0 4px 14px;margin-top:16px;color:var(--ink)}
.contact-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:48px;padding:40px 0;align-items:start}
.form-card{border:1px solid var(--line);border-radius:8px;background:var(--card);padding:32px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.contact-side .card{margin-bottom:18px}
.contact-side .card:last-child{margin-bottom:0}
@media(max-width:780px){.svc{grid-template-columns:1fr;gap:14px;padding:32px 0}.contact-grid{grid-template-columns:1fr;gap:24px}.form-row{grid-template-columns:1fr}.form-card{padding:23px}}

/* ---- multi-device, motion & print ---- */
html{scroll-behavior:smooth;scroll-padding-top:96px}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media(max-width:1000px){.hero{gap:36px}.contact-grid{gap:28px}.detail{padding:28px 0}}
@media print{
  header,.language-switch,.actions,.button,.text-link,.skip,.service-rail b{display:none!important}
  body{background:#fff;color:#000;font-size:12px}
  .band{background:#fff!important;color:#000!important;border:1px solid #999}
  .band p,.band h2,.band .eyebrow{color:#000!important}
  .stack>div{background:#fff!important;color:#000!important;border:1px solid #999}
  .card,.lab{border:1px solid #999;break-inside:avoid}
  .lab svg{max-height:320px}
  footer{grid-template-columns:1fr 1fr 1fr}
  a{text-decoration:underline}
  section{padding:20px 0}
}