:root{--ink:#12161A;--ink2:#1A2028;--paper:#EEF0F1;--white:#fff;--line:#D5DADF;--steel:#4D5761;--muted:#C3CAD1;--blue:#1747A6;--amber:#F2B705;
--display:Archivo,'Noto Sans SC',sans-serif;--body:'IBM Plex Sans','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;--mono:'IBM Plex Mono','Noto Sans SC',monospace}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.6}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue)}a:hover{color:#0E2F72}
:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
.dark :focus-visible,header :focus-visible{outline-color:var(--amber)}
input,textarea,select,button{font:inherit}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
section{padding:104px 0}
.dark{background:var(--ink);color:var(--white)}
.white{background:var(--white)}
.kicker{font-family:var(--mono);font-size:14px;letter-spacing:.12em;color:var(--blue);margin:0 0 12px;text-transform:uppercase}
.dark .kicker{color:var(--amber)}
h1,h2,h3{font-family:var(--display);margin:0}
h2{font-stretch:80%;font-weight:800;font-size:52px;line-height:1.02}
h3{font-stretch:85%;font-size:23px;line-height:1.2}
.lead{color:var(--steel);max-width:640px;margin:16px 0 0}
.dark .lead{color:var(--muted)}
.sec-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:24px;margin-bottom:48px}
.sec-head>div{max-width:680px}
.btn{display:inline-flex;align-items:center;min-height:48px;padding:13px 26px;font-weight:600;text-decoration:none;border:0;cursor:pointer}
.btn-amber{background:var(--amber);color:var(--ink)}.btn-amber:hover{background:#FFC72C;color:var(--ink)}
.btn-ghost{border:1.5px solid #5B6570;color:var(--white)}.btn-ghost:hover{border-color:var(--white);color:var(--white)}
.btn-ink{background:var(--ink);color:var(--white)}.btn-ink:hover{background:#2A3038;color:var(--white)}
.grid{display:grid;gap:28px}
.g2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.g6{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px}
/* header */
.site-header{background:var(--ink);color:var(--white);position:sticky;top:0;z-index:10;border-bottom:1px solid #2A3038}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;padding-top:14px;padding-bottom:14px}
.logo{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--white)}
.logo-mark{width:36px;height:36px;background:var(--amber);display:flex;align-items:center;justify-content:center}
.logo-text{font-family:var(--display);font-stretch:80%;font-weight:800;font-size:22px;letter-spacing:.04em}
.logo-text span{font-weight:500;color:#A9B2BB}
.logo:hover{color:var(--white)}
.nav{display:flex;flex-wrap:wrap;align-items:center;gap:6px 24px;font-size:15px}
.nav a{color:#D5DADF;text-decoration:none}.nav a:hover{color:var(--white)}
.nav .lang{border:1px solid #5B6570;padding:8px 14px;min-height:44px;display:inline-flex;align-items:center;color:var(--white);font-weight:600}
.nav .btn{min-height:44px;padding:10px 20px}
/* hero */
.hero{padding:80px 0 96px}
.hero-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:56px;align-items:center}
.hero h1{font-stretch:78%;font-weight:800;font-size:clamp(44px,6vw,80px);line-height:.98;letter-spacing:-.01em;margin:0 0 24px}
.hero p.sub{font-size:19px;color:var(--muted);max-width:560px;margin:0 0 28px}
.hero .ctas{display:flex;flex-wrap:wrap;gap:14px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 28px;margin:36px 0 0;padding:20px 0 0;border-top:1px solid #2F3741;list-style:none;padding-left:0;font-size:15px;color:#D5DADF}
.hero-facts li{display:flex;align-items:center;gap:8px}
.hero-facts li::before{content:"";width:8px;height:8px;background:var(--amber)}
.hero figure{margin:0}
.hero figure img{width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid #2F3741}
/* creds */
.creds{padding:28px 0;border-bottom:1px solid var(--line)}
.creds .grid{gap:24px}
.cred b{display:block;font-family:var(--display);font-stretch:80%;font-weight:800;font-size:26px}
.cred span{font-size:14px;color:var(--steel)}
/* markets */
.markets{padding:72px 0}
.market{background:var(--white);border:1px solid var(--line);padding:22px;display:flex;flex-direction:column;gap:14px;font-weight:600;font-size:16px;line-height:1.35}
.market svg{color:var(--blue)}
/* services */
.svc{background:var(--white);border:1px solid var(--line);display:flex;flex-direction:column}
.svc img{aspect-ratio:3/2;object-fit:cover;width:100%}
.svc-body{padding:28px;display:flex;flex-direction:column;gap:12px}
.svc-body p{margin:0;color:var(--steel);font-size:16px}
.ticks{list-style:none;margin:4px 0 0;padding:0;display:flex;flex-direction:column;gap:8px;font-size:15px}
.ticks li{display:flex;gap:10px;align-items:flex-start}
.ticks li::before{content:"";flex:0 0 10px;height:10px;margin-top:7px;border:2px solid var(--blue)}
.dark .ticks li::before{border-color:var(--amber)}
/* overseas */
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:56px;align-items:center}
.split img{width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid #2F3741}
.points{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:28px;margin-top:40px}
.point h3{font-size:20px;margin-bottom:8px}
.point p{margin:0;color:var(--muted);font-size:16px}
.point{border-top:2px solid var(--amber);padding-top:18px}
/* projects */
.proj{background:var(--white);border:1px solid var(--line);display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.proj img{width:100%;height:100% !important;min-height:280px;object-fit:cover}
.proj-body{padding:32px;display:flex;flex-direction:column;gap:14px}
.proj-tag{font-family:var(--mono);font-size:13px;color:var(--blue)}
.proj-body h3{font-size:28px}
.proj-body p{margin:0;color:var(--steel);font-size:16px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:6px 0 0;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.facts dt{font-size:13px;color:var(--steel)}
.facts dd{margin:0;font-weight:600;font-size:16px}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.chips li{border:1px solid #9AA3AC;padding:4px 10px;font-size:13px}
.dark .chips li{border-color:#5B6570}
.note{font-size:14px;color:var(--steel);margin:0 0 32px;max-width:760px}
.stack{display:flex;flex-direction:column;gap:28px}
/* process */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;list-style:none;margin:0;padding:0;counter-reset:s}
.steps li{border-top:2px solid var(--amber);padding-top:18px;counter-increment:s}
.steps li::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);color:var(--amber);display:block;margin-bottom:8px}
.steps h3{font-size:20px;margin-bottom:8px}
.steps p{margin:0;color:var(--muted);font-size:16px}
/* safety */
.programs{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;margin-top:32px}
.program h3{font-size:19px;margin-bottom:6px}
.program p{margin:0;color:var(--steel);font-size:15px}
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:2px;background:var(--line);border:2px solid var(--line);margin-top:40px}
.metric{background:var(--white);padding:24px}
.metric b{display:block;font-family:var(--display);font-stretch:80%;font-weight:800;font-size:34px}
.metric span{font-size:14px;color:var(--steel)}
.safety-img{width:100%;aspect-ratio:4/3;object-fit:cover}
/* licenses */
.lic{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--line);font-size:16px}
.lic th,.lic td{text-align:left;padding:16px 20px;border-bottom:1px solid var(--line);vertical-align:top}
.lic th{width:42%;font-weight:600}
.table-box{overflow-x:auto}
.quote{margin:48px 0 0;padding:36px;background:var(--ink);color:var(--white)}
.quote p{font-family:var(--display);font-stretch:85%;font-size:26px;line-height:1.3;margin:0 0 16px}
.quote cite{font-style:normal;color:var(--muted);font-size:15px}
/* careers */
.careers{background:var(--amber);color:var(--ink)}
.careers .kicker{color:var(--ink)}
.job{background:var(--white);padding:24px;display:flex;flex-direction:column;gap:8px;border:1px solid #D9A400}
.job h3{font-size:21px}
.job p{margin:0;font-size:15px;color:var(--steel)}
.offer{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;margin-top:40px}
.offer .ticks li::before{border-color:var(--ink)}
.eeo{font-size:14px;margin:24px 0 0}
/* faq */
.faq details{background:var(--white);border:1px solid var(--line);margin-bottom:10px}
.faq summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--blue);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0;padding:0 24px 22px;color:var(--steel)}
/* contact */
.contact-info{display:flex;flex-direction:column;gap:6px;font-size:16px;margin-top:20px}
.contact-info dt{font-size:13px;color:var(--steel);margin-top:12px}
.contact-info dd{margin:0}
form.bid{background:var(--white);border:1px solid var(--line);padding:36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:600}
.field input,.field select,.field textarea{border:1px solid #9AA3AC;padding:12px;min-height:44px;background:var(--white);color:var(--ink)}
.field textarea{resize:vertical}
form.bid button{grid-column:1/-1;min-height:52px;justify-content:center;font-size:16px}
.form-status{grid-column:1/-1;margin:0;font-size:15px}
.hp{position:absolute;left:-9999px}
/* footer */
footer{background:var(--ink);color:#A9B2BB;font-size:14px}
footer .top{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;padding:56px 0 32px}
footer h4{color:var(--white);font-size:15px;margin:0 0 12px}
footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
footer a{color:#D5DADF;text-decoration:none}footer a:hover{color:var(--white)}
footer .bottom{border-top:1px solid #2A3038;padding:20px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
/* zh */
html[lang="zh-CN"] h1,html[lang="zh-CN"] h2,html[lang="zh-CN"] h3,html[lang="zh-CN"] .quote p{line-height:1.25;letter-spacing:.01em}
html[lang="zh-CN"] .hero h1{line-height:1.15}
@media (max-width:640px){
  section{padding:64px 0}.wrap{padding:0 20px}h2{font-size:36px}
  form.bid{padding:22px}.nav{gap:6px 16px}.site-header{position:static}
  .proj-body{padding:24px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
/* hiring strip */
.strip{background:var(--amber);color:var(--ink);padding:18px 0}
.strip .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px}
.strip p{margin:0;font-weight:600;font-size:17px}
.strip .links{display:flex;flex-wrap:wrap;gap:12px}
.strip a{color:var(--ink);font-weight:600;min-height:44px;display:inline-flex;align-items:center;padding:0 16px;border:1.5px solid var(--ink);text-decoration:none}
.strip a:hover{background:var(--ink);color:var(--white)}
/* bids */
.ways{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:2px;background:#2F3741;border:2px solid #2F3741;margin-bottom:56px}
.way{background:var(--ink2);padding:28px;display:flex;flex-direction:column;gap:10px}
.way h3{font-size:22px}.way p{margin:0;color:var(--muted);font-size:16px}
.way a{color:var(--amber);font-weight:600;margin-top:auto}
.pkg{background:var(--white);color:var(--ink);display:flex;flex-direction:column}
.pkg-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:20px 28px;border-bottom:1px solid var(--line)}
.state{font-family:var(--mono);font-size:14px;font-weight:500;color:var(--blue);text-transform:uppercase;letter-spacing:.06em}
.status{font-size:13px;font-weight:600;padding:5px 12px;border:1.5px solid currentColor}
.status.open{color:#1B6B3A}.status.soon{color:#8A5A00}
.pkg-body{padding:28px;display:flex;flex-direction:column;gap:16px;flex:1}
.pkg-body h3{font-size:26px}
.pkg-body .type{font-size:14px;color:var(--steel);margin:-8px 0 0}
.pkg-body p{margin:0;color:var(--steel);font-size:16px}
.pkg-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;padding-top:16px;border-top:1px solid var(--line)}
.pkg-cols h4{margin:0 0 10px;font-size:14px;color:var(--steel);font-weight:600}
.pkg-foot{padding:0 28px 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.pkg-foot small{color:var(--steel);font-size:14px;max-width:420px}
.prequal{margin-top:56px;display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:48px;align-items:start}
fieldset.field{border:0;padding:0;margin:0}
fieldset.field legend{font-size:14px;font-weight:600;padding:0;margin-bottom:8px}
.checks{display:flex;flex-wrap:wrap;gap:8px}
.checks label{display:inline-flex;align-items:center;gap:8px;border:1px solid #9AA3AC;padding:8px 12px;min-height:44px;font-size:15px;font-weight:400;cursor:pointer}
.checks input{width:18px;height:18px;margin:0;accent-color:var(--blue)}
.req-list{list-style:none;margin:20px 0 0;padding:0;display:flex;flex-direction:column;gap:10px;color:var(--muted);font-size:16px}
.req-list li{display:flex;gap:10px}.req-list li::before{content:"";flex:0 0 10px;height:10px;margin-top:7px;border:2px solid var(--amber)}
.job .loc{display:flex;flex-wrap:wrap;gap:6px;margin-top:auto;padding-top:8px}
.job .loc span{font-family:var(--mono);font-size:12px;background:var(--paper);padding:3px 8px}
form.bid{color:var(--ink)}
.dark form.bid :focus-visible{outline-color:var(--blue)}
.pkg .ticks li::before{border-color:var(--blue)}
.dark .pkg :focus-visible{outline-color:var(--blue)}