:root{
  --ink:#121412;
  --muted:#656a64;
  --paper:#f4f1ea;
  --paper-deep:#e8e3d8;
  --white:#fffdf8;
  --accent:#f0643b;
  --bay:#1f506d;
  --line:#1214122e;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--paper)}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:PingFang SC,Noto Sans CJK SC,Microsoft YaHei,Arial,sans-serif;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
.shell{width:min(100% - 72px,1240px);margin-inline:auto}
.site-header{
  min-height:92px;
  display:grid;
  grid-template-columns:1fr auto;
  align-items:center;
  gap:28px;
  border-bottom:1px solid #ffffff30;
}
.brand{display:inline-flex;align-items:center;gap:14px;color:var(--white)}
.brand-mark{width:34px;height:34px;display:inline-block;position:relative}
.brand-mark i{background:currentColor;width:11px;height:27px;display:block;position:absolute;transform:skew(-18deg)}
.brand-mark i:first-child{bottom:2px;left:4px}
.brand-mark i:last-child{background:var(--accent);top:2px;right:4px}
.brand-copy{display:flex;flex-direction:column;line-height:1}
.brand-copy strong{letter-spacing:.22em;font-size:20px;font-weight:650}
.brand-copy small{letter-spacing:.19em;opacity:.7;margin-top:7px;font-size:8px}
.site-nav{display:flex;align-items:center;gap:28px;color:#ffffffbd;font-size:13px}
.site-nav a:last-child{border:1px solid #ffffff70;padding:11px 16px;color:var(--white)}
.article-hero{background:#101815;color:var(--white)}
.hero-inner{padding:76px 0 92px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:9px;color:#ffffff75;font-size:11px}
.breadcrumb span{opacity:.55}
.article-kicker{margin:74px 0 22px;color:var(--accent);font-size:11px;letter-spacing:.18em}
.article-hero h1{
  max-width:1000px;
  margin:0;
  font-size:clamp(46px,6vw,84px);
  line-height:1.08;
  letter-spacing:-.055em;
  font-weight:520;
}
.article-lead{max-width:760px;margin:30px 0 0;color:#ffffffe0;font-size:17px;line-height:1.9}
.article-meta{display:flex;flex-wrap:wrap;gap:16px 28px;margin-top:42px;color:#ffffff7d;font-size:11px}
.article-layout{
  display:grid;
  grid-template-columns:250px minmax(0,760px);
  justify-content:space-between;
  gap:8vw;
  padding:92px 0 110px;
}
.article-aside{align-self:start;position:sticky;top:30px}
.aside-label{margin:0 0 18px;color:var(--muted);font-size:10px;letter-spacing:.18em}
.aside-nav{border-top:1px solid var(--line)}
.aside-nav a{display:block;border-bottom:1px solid var(--line);padding:14px 0;color:var(--muted);font-size:12px;line-height:1.55}
.aside-contact{margin-top:28px;background:var(--paper-deep);padding:22px}
.aside-contact strong{display:block;font-size:18px;line-height:1.45}
.aside-contact p{margin:12px 0 18px;color:var(--muted);font-size:11px;line-height:1.75}
.aside-contact a{display:block;background:var(--ink);color:var(--white);padding:12px 14px;text-align:center;font-size:12px}
.prose{font-size:16px;line-height:2}
.prose h2{scroll-margin-top:28px;margin:72px 0 22px;font-size:36px;line-height:1.32;letter-spacing:-.035em;font-weight:560}
.prose h2:first-child{margin-top:0}
.prose h3{margin:38px 0 12px;font-size:22px;line-height:1.45;font-weight:560}
.prose p{margin:0 0 22px;color:#343934}
.prose strong{color:var(--ink)}
.prose ul,.prose ol{margin:20px 0 28px;padding-left:1.35em}
.prose li{margin:9px 0;color:#343934}
.summary-box{background:var(--bay);color:var(--white);padding:30px;margin:0 0 48px}
.summary-box strong{display:block;color:var(--white);font-size:23px;line-height:1.45}
.summary-box p{margin:12px 0 0;color:#ffffffb5;font-size:14px;line-height:1.8}
.decision-grid{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line);margin:28px 0 40px}
.decision-card{border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:24px;min-height:190px}
.decision-card span{color:var(--accent);font-size:10px}
.decision-card h3{margin:38px 0 10px;font-size:20px}
.decision-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.75}
.checklist{counter-reset:item;list-style:none!important;padding:0!important;margin:28px 0 42px!important;border-top:1px solid var(--line)}
.checklist li{counter-increment:item;display:grid;grid-template-columns:42px 1fr;gap:16px;padding:20px 0;margin:0!important;border-bottom:1px solid var(--line)}
.checklist li:before{content:counter(item,decimal-leading-zero);color:var(--accent);font-size:10px;padding-top:5px}
.checklist strong{display:block;margin-bottom:4px;font-size:18px}
.boundary{border-left:4px solid var(--accent);background:var(--white);padding:24px 28px;margin:34px 0}
.boundary p{margin:0;font-size:14px}
.faq-list{margin-top:28px;border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{cursor:pointer;padding:20px 0;font-size:16px;font-weight:560}
.faq-list details p{margin:0 0 22px;color:var(--muted);font-size:14px}
.author-card{display:grid;grid-template-columns:1fr auto;align-items:center;gap:28px;margin-top:72px;padding:30px;background:var(--paper-deep)}
.author-card small{display:block;color:var(--muted);font-size:9px;letter-spacing:.18em}
.author-card h2{margin:10px 0 8px;font-size:25px}
.author-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
.author-card a{border-bottom:1px solid var(--ink);white-space:nowrap;font-size:12px;padding:8px 0}
.related{background:var(--white);padding:86px 0}
.related h2{margin:0 0 36px;font-size:34px;font-weight:550}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.related-card{border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:190px;padding:22px;display:flex;flex-direction:column;justify-content:space-between}
.related-card span{color:var(--accent);font-size:10px}
.related-card strong{font-size:18px;line-height:1.5}
.project-cta{background:var(--bay);color:var(--white);padding:88px 0}
.project-cta-grid{display:grid;grid-template-columns:1.4fr .7fr;gap:8vw;align-items:center}
.project-cta h2{margin:0;font-size:clamp(42px,5vw,68px);line-height:1.12;letter-spacing:-.05em;font-weight:520}
.project-cta p{margin:22px 0 0;max-width:620px;color:#ffffffaa;font-size:14px;line-height:1.85}
.project-contact{background:var(--white);color:var(--ink);padding:28px}
.project-contact small{color:var(--muted);font-size:9px;letter-spacing:.16em}
.project-contact strong{display:block;margin:18px 0 7px;font-size:26px}
.project-contact p{margin:0 0 20px;color:var(--muted);font-size:12px;line-height:1.7}
.project-contact a{display:block;text-align:center;background:var(--accent);color:var(--white);padding:14px}
.footer{background:var(--ink);color:var(--white);padding:54px 0 24px}
.footer-main{display:grid;grid-template-columns:1fr 1fr auto;gap:30px;align-items:start;min-height:100px}
.footer-contact{color:#ffffff8c;font-size:12px;line-height:1.8}
.footer-contact a{display:block;color:var(--white);font-size:14px}
.footer-meta{border-top:1px solid #ffffff2e;padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#ffffff60;font-size:9px;letter-spacing:.08em}
@media(max-width:900px){
  .article-layout{grid-template-columns:1fr;gap:50px}
  .article-aside{position:static}
  .aside-nav{display:grid;grid-template-columns:1fr 1fr}
  .aside-nav a{padding-right:16px}
  .related-grid{grid-template-columns:1fr 1fr}
  .project-cta-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .shell{width:min(100% - 30px,1240px)}
  .site-header{min-height:78px}
  .site-nav{gap:12px}
  .site-nav a:not(:last-child){display:none}
  .hero-inner{padding:56px 0 70px}
  .article-kicker{margin-top:54px}
  .article-hero h1{font-size:44px}
  .article-lead{font-size:15px}
  .article-layout{padding:66px 0 80px}
  .aside-nav{grid-template-columns:1fr}
  .prose{font-size:15px}
  .prose h2{font-size:29px;margin-top:56px}
  .decision-grid{grid-template-columns:1fr}
  .decision-card{min-height:165px}
  .author-card{grid-template-columns:1fr}
  .related{padding:66px 0}
  .related-grid{grid-template-columns:1fr}
  .project-cta{padding:66px 0}
  .footer-main{grid-template-columns:1fr;min-height:190px}
  .footer-meta{flex-direction:column}
}