:root{
  --bg:#171614;
  --bg-2:#1d1c1a;
  --panel:#222120;
  --panel-2:#282624;
  --line:#35332f;
  --line-2:#4a4741;
  --fg:#eae7e1;
  --fg-2:#b5b0a8;
  --fg-3:#918c84;
  --amber:#e0a044;
  --amber-2:#f0b45f;
  --cool:#8ab6c6;
  --radius:3px;
  --pad:clamp(16px,4vw,40px);
  --measure:37.5em;
  --bleed:7em;
  --font:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.005em;
  overflow-x:hidden;
}
img,video{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{line-height:1.32;letter-spacing:0;margin:0 0 .5em;font-weight:650}
h1{font-size:clamp(1.9rem,4.2vw,2.9rem)}
h2{font-size:clamp(1.35rem,2.6vw,1.8rem)}
h3{font-size:1.12rem}
p{margin:0 0 1.1em}
a{color:var(--fg);text-decoration:none;border-bottom:1px solid var(--line-2);transition:color .15s ease,border-color .15s ease}
a:hover{color:var(--amber-2);border-color:var(--amber)}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:2px}
strong{font-weight:650}
hr{border:0;border-top:1px solid var(--line);margin:2.5em 0}
code{font-family:var(--mono);font-size:.86em;background:var(--panel);padding:.12em .4em;border-radius:2px;color:var(--fg-2)}
pre{font-family:var(--mono);font-size:.82rem;line-height:1.6;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;overflow-x:auto;margin:0}
pre code{background:none;padding:0;color:var(--fg-2);white-space:pre}
.wrap{max-width:1160px;margin:0 auto;padding:0 var(--pad)}
.skip{position:absolute;left:-9999px;top:0;background:var(--amber);color:#171614;padding:10px 16px;z-index:50}
.skip:focus{left:8px;top:8px}
/* ---------- header ---------- */
.top{position:sticky;top:0;z-index:20;background:rgba(23,22,20,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-inner{display:flex;align-items:center;gap:24px;min-height:58px}
.brand{display:flex;align-items:center;gap:10px;border:0;flex:0 0 auto}
.brand-mark{flex:0 0 auto;display:block;width:24px;height:24px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:650;letter-spacing:.01em}
.brand-tag{font-family:var(--mono);font-size:.62rem;color:var(--fg-3);letter-spacing:.08em;text-transform:uppercase}
.nav{display:flex;gap:20px;margin-left:auto;overflow-x:auto;scrollbar-width:none;font-size:.9rem}
.nav::-webkit-scrollbar{display:none}
.nav a{border:0;color:var(--fg-2);white-space:nowrap;padding:6px 0;min-height:32px;display:flex;align-items:center}
.nav a:hover{color:var(--fg)}
main{padding:clamp(24px,4vw,52px) 0 clamp(40px,7vw,90px)}
/* ---------- breadcrumbs ---------- */
.crumbs{font-family:var(--mono);font-size:.72rem;color:var(--fg-3);letter-spacing:.04em;margin-bottom:1.6em;display:flex;flex-wrap:wrap;gap:8px}
.crumbs a{border:0;color:var(--fg-3)}
.crumbs a:hover{color:var(--amber-2)}
.crumbs span{color:var(--fg-2)}
/* ---------- prose ---------- */
.prose{max-width:var(--measure);margin:0 auto}
.prose>.prose{max-width:none}
.prose h1,.prose h2,.prose h3{max-width:var(--measure);margin-inline:auto}
.prose h2{margin-top:2.4em;padding-top:.9em;border-top:1px solid var(--line)}
.prose h3{margin-top:1.8em}
.prose p,.prose ul,.prose ol,.prose blockquote,.prose dl{max-width:var(--measure);margin-inline:auto}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.35em 0}
.prose li>a{word-break:break-word}
.prose blockquote{border-left:2px solid var(--amber);padding-left:1em;color:var(--fg-2);margin-inline:auto}
.prose img,.prose video,.prose pre,.prose table,.prose .figure-video,.prose .code-block{
  width:calc(100% + 2*var(--bleed));max-width:none;margin-left:calc(-1*var(--bleed));margin-right:calc(-1*var(--bleed));
}
.prose img,.prose video{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-2)}
.prose img.thumb{cursor:zoom-in}
.prose .code-block{margin-top:1.4em;margin-bottom:1.4em}
.prose table{border-collapse:collapse;font-size:.92rem;margin-top:1.4em;margin-bottom:1.4em}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
.prose th{background:var(--panel);font-weight:600;white-space:nowrap}
.prose tbody tr:nth-child(even){background:rgba(255,255,255,.015)}
.prose details{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin:1.4em auto;max-width:var(--measure);background:var(--bg-2)}
.prose summary{cursor:pointer;font-weight:600}
.prose details[open] summary{margin-bottom:.8em}
.source-link{font-family:var(--mono);font-size:.72rem;color:var(--fg-3);margin-top:.5em}
.source-link a{color:var(--fg-3)}
/* ---------- shared blocks ---------- */
.doc-head{max-width:var(--measure);margin:0 auto 2.4em}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber);margin-bottom:.9em}
.lede{font-size:1.06rem;color:var(--fg-2);max-width:44em}
.slate{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 0 1.4em}
.slate>div{padding:12px 16px 13px 0;border-right:1px solid var(--line);min-width:0}
.slate>div:last-child{border-right:0}
.slate dt{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--fg-3);margin-bottom:4px}
.slate dd{margin:0;font-size:.94rem;color:var(--fg);overflow-wrap:anywhere}
.slate--hero{margin-top:1.6em}
.slate--meta{border-top:0}
.slate--meta>div{padding-block:8px}
.figure-video,.figure-image{margin:0}
.figure-video video{width:100%;background:#000}
.figure-video figcaption,.figure-image figcaption{font-size:.86rem;color:var(--fg-3);margin-top:.7em;max-width:60ch}
.figure-video--vertical video{max-height:min(78vh,860px);width:auto;margin:0 auto}
.chip{display:inline-block;font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;padding:3px 8px;border:1px solid var(--line-2);border-radius:99px;color:var(--fg-2);white-space:nowrap}
.chip--revise{border-color:var(--amber);color:var(--amber)}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin:1.6em 0 .8em}
.btn{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border:1px solid var(--line-2);border-radius:var(--radius);color:var(--fg);font-size:.94rem;background:var(--panel)}
.btn:hover{border-color:var(--fg-3);color:var(--fg)}
.btn--primary{background:var(--amber);border-color:var(--amber);color:#171614;font-weight:600}
.btn--primary:hover{background:var(--amber-2);border-color:var(--amber-2);color:#171614}
/* ---------- hero ---------- */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,56px);align-items:center;padding-bottom:clamp(32px,5vw,64px);border-bottom:1px solid var(--line)}
.hero h1{margin-bottom:.5em}
.hero-caveat{font-size:.84rem;color:var(--fg-3);max-width:40ch}
.hero-media{display:flex;flex-direction:column;gap:12px}
.hero-media video{width:100%;height:auto}
.hero-links{display:flex;flex-wrap:wrap;gap:18px;font-size:.9rem}
.section{padding:clamp(36px,6vw,72px) 0;border-bottom:1px solid var(--line)}
.section:last-of-type{border-bottom:0}
.section-head{max-width:52em;margin-bottom:2em}
.section-head p{color:var(--fg-2);margin:0}
/* ---------- cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:clamp(20px,3vw,34px)}
.case{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column}
.case video{width:100%;background:#000;border-radius:2px}
.case h3{margin:16px 0 12px;font-size:1.06rem}
.case h3 a{border:0}
.case .slate{grid-template-columns:1fr 1fr;margin-bottom:1em}
.case .slate>div{border-right:0;padding:8px 0}
.case-note{font-size:.86rem;color:var(--fg-3);margin:0 0 .8em}
.case-links{display:flex;flex-wrap:wrap;gap:14px;font-size:.86rem;margin:auto 0 0;padding-top:.6em;border-top:1px solid var(--line)}
.case-links a{color:var(--fg-2)}
/* ---------- gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:clamp(14px,2vw,22px)}
.gallery figure{margin:0;overflow:hidden;border-radius:var(--radius)}
.gallery img{aspect-ratio:3/2;object-fit:cover;width:100%;height:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-2);cursor:zoom-in;transition:transform .35s cubic-bezier(.22,.61,.36,1),filter .35s ease;filter:saturate(.94)}
.gallery figure:hover img{transform:scale(1.02);filter:saturate(1)}
.gallery figcaption{display:flex;gap:8px;align-items:baseline;margin-top:9px;font-size:.86rem;color:var(--fg-2)}
.gallery-title{border:0;color:var(--fg-2)}
.gallery-title:hover{color:var(--amber-2)}
.section-links{display:flex;flex-wrap:wrap;gap:20px;margin-top:2em;font-size:.94rem}
/* ---------- revision pairs ---------- */
.pairs{display:grid;gap:clamp(24px,4vw,42px)}
.pair{border-top:1px solid var(--line);padding-top:20px}
.pair h3{margin-bottom:.3em}
.pair h3 a{border:0}
.pair-defect{font-family:var(--mono);font-size:.78rem;color:var(--amber);margin-bottom:1em;word-break:break-word}
.pair-media{display:grid;grid-template-columns:1fr 1fr;gap:clamp(14px,2vw,24px)}
.pair-media figure{margin:0}
.pair-media img{width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid var(--line);border-radius:var(--radius);cursor:zoom-in}
.pair-media figcaption{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;color:var(--fg-3);margin-top:8px;text-transform:uppercase}
/* ---------- tools & evidence ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:clamp(18px,3vw,30px)}
.tool{border-top:2px solid var(--amber);padding-top:14px;display:flex;flex-direction:column}
.tool h3{margin-bottom:.4em}
.tool p{color:var(--fg-2);font-size:.94rem}
.tool-meta{font-family:var(--mono);font-size:.72rem;color:var(--fg-3);letter-spacing:.03em}
.tool-links{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin:auto 0 0;padding-top:1em}
.tool-links .btn{padding:0 14px;font-size:.88rem}
.link-quiet{border:0;color:var(--fg-2);font-size:.88rem}
.link-quiet:hover{color:var(--amber-2)}
.evidence{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:0}
.evidence li{border-top:1px solid var(--line);padding:14px 20px 14px 0;display:flex;flex-direction:column;gap:4px}
.evidence a{font-weight:600;border:0}
.evidence span{font-size:.86rem;color:var(--fg-3)}
/* ---------- case page ---------- */
.case-page .doc-head{max-width:52em}
.case-detail{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(20px,3vw,40px);margin-top:clamp(24px,4vw,44px);align-items:start}
.case-side p{color:var(--fg-2);font-size:.94rem}
.page-nav{display:flex;flex-wrap:wrap;gap:16px 28px;justify-content:space-between;margin-top:clamp(30px,5vw,60px);padding-top:18px;border-top:1px solid var(--line);font-size:.94rem;color:var(--fg-3)}
/* ---------- entries ---------- */
.entries{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:26px}
.entry h2{font-size:1.1rem;margin-bottom:.4em}
.entry h2 a{border:0}
.entry p{color:var(--fg-2);font-size:.92rem}
/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);background:var(--bg-2);padding:clamp(28px,4vw,50px) 0;font-size:.9rem}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:26px}
.foot h2{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-3);margin-bottom:.8em}
.foot p,.foot ul{color:var(--fg-2);margin:0}
.foot ul{list-style:none;padding:0}
.foot li{margin:.4em 0}
.foot-note{margin-top:26px;padding-top:16px;border-top:1px solid var(--line);font-family:var(--mono);font-size:.72rem;color:var(--fg-3)}
/* ---------- lightbox ---------- */
.lightbox{border:0;padding:0;margin:0;inset:0;max-width:none;max-height:none;width:100%;height:100%;background:transparent}
.lightbox::backdrop{background:rgba(10,9,8,.94)}
.lightbox figure{margin:0;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:clamp(16px,4vw,48px)}
.lightbox img{max-height:78vh;width:auto;border:1px solid var(--line-2)}
.lightbox figcaption{color:var(--fg-2);font-size:.9rem;text-align:center;max-width:70ch}
.lightbox-close{position:absolute;top:14px;right:18px;min-width:44px;min-height:44px;font-size:1.4rem;background:transparent;color:var(--fg);border:1px solid var(--line-2);border-radius:var(--radius);cursor:pointer}
.lightbox-nav{position:absolute;bottom:18px;left:0;right:0;display:flex;justify-content:center;gap:14px}
.lightbox-nav button{min-width:52px;min-height:44px;background:var(--panel);color:var(--fg);border:1px solid var(--line-2);border-radius:var(--radius);cursor:pointer;font-size:1.1rem}
.lightbox-nav button:hover{border-color:var(--amber)}
/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(14px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .5s cubic-bezier(.22,.61,.36,1),transform .5s cubic-bezier(.22,.61,.36,1)}
@media (prefers-reduced-motion:reduce){
  .reveal,.reveal.is-in{opacity:1;transform:none;transition:none}
  .gallery-link img{transition:none}
  html{scroll-behavior:auto}
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}
/* ---------- responsive ---------- */
@media (max-width:980px){
  :root{--bleed:0em}
  .hero{grid-template-columns:1fr;gap:30px}
  .hero-media{order:-1}
  .figure-video--vertical video{max-height:62vh}
  .case-detail{grid-template-columns:1fr}
}
@media (max-width:720px){
  body{font-size:16px}
  .top-inner{flex-wrap:wrap;gap:8px;padding-block:8px}
  .nav{gap:16px;font-size:.86rem;width:100%;margin-left:0}
  .pair-media{grid-template-columns:1fr}
  .slate{grid-template-columns:1fr}
  .slate>div{border-right:0;border-bottom:1px solid var(--line);padding-right:0}
  .slate>div:last-child{border-bottom:0}
  .gallery{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .crumbs{font-size:.68rem}
}
@media (max-width:400px){
  .gallery{grid-template-columns:1fr 1fr}
  .case .slate{grid-template-columns:1fr}
}
@media print{
  .top,.foot,.lightbox,.hero-media{display:none}
  body{background:#fff;color:#000}
}