*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
:where(h1,h2,h3,h4){font-weight:800;line-height:1.08;letter-spacing:.02em}

:root{
  --ink:#0B1F1A;
  --coal:#111312;
  --rock:#343C38;
  --moss:#5F7A67;
  --mint:#58F2B0;
  --signal:#FF7A3D;
  --clay:#B86B4B;
  --paper:#F4F0E4;
  --paper-78:rgba(244,240,228,.78);
  --paper-66:rgba(244,240,228,.66);
  --paper-50:rgba(244,240,228,.5);
  --paper-34:rgba(244,240,228,.34);
  --ink-70:rgba(11,31,26,.74);
  --ink-50:rgba(11,31,26,.52);
  --line:rgba(244,240,228,.13);
  --line-strong:rgba(244,240,228,.28);
  --line-ink:rgba(11,31,26,.14);
  --mint-soft:rgba(88,242,176,.12);
  --signal-soft:rgba(255,122,61,.12);
  --clay-soft:rgba(184,107,75,.16);
  --font-display:"Oswald","Barlow Condensed","Archivo Narrow","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1280px;
  --pad:clamp(16px,4vw,40px);
  --r:3px;
  --dur:200ms;
  --ease:cubic-bezier(.2,.7,.3,1);
}

body{
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 50% -12%,rgba(88,242,176,.075),transparent 70%),
    radial-gradient(820px 520px at 100% 104%,rgba(184,107,75,.075),transparent 66%);
  background-attachment:fixed;
  color:var(--paper-78);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.78;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body{text-wrap:pretty}
::selection{background:var(--mint);color:#06170F}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:2px}
:where(h1,h2,h3,h4){font-family:var(--font-display);color:var(--paper)}
p{max-width:36em}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.mono-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.divider{height:1px;background:var(--line);border:0;margin-block:clamp(24px,3vw,40px)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px;border:1px solid transparent;border-radius:var(--r);
  font-family:var(--font-body);font-size:14px;font-weight:600;letter-spacing:.07em;
  text-decoration:none;cursor:pointer;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--mint);color:#06170F}
.btn--primary:hover{background:#7df8c3}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover{border-color:var(--mint);color:var(--mint)}
.btn--signal{background:var(--signal);color:#1B0C04}
.btn--signal:hover{background:#ff8f5b}
.btn--sm{padding:9px 15px;font-size:12.5px;letter-spacing:.1em}

/* ---------- breadcrumb ---------- */
.breadcrumb{padding-block:16px;border-bottom:1px solid var(--line)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--paper-50)}
.breadcrumb__link{color:inherit;text-decoration:none;border-bottom:1px solid transparent;transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease)}
.breadcrumb__link:hover{color:var(--mint);border-bottom-color:rgba(88,242,176,.5)}
.breadcrumb__sep{color:var(--paper-34)}
.breadcrumb__current{color:var(--mint)}

/* ---------- sections & layout ---------- */
.section{padding-block:clamp(48px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4vw,52px)}
.section--paper{background:var(--paper);color:var(--ink-70)}
.section--paper :where(h1,h2,h3,h4){color:var(--ink)}
.section--coal{background:var(--coal)}
.section-head{display:grid;gap:14px;max-width:42em;margin-bottom:clamp(24px,3.4vw,44px)}
.section-eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--mint);
}
.section-eyebrow::before{content:"";width:26px;height:1px;background:currentColor;flex:0 0 auto}
.section-title{font-size:clamp(30px,4.4vw,54px);letter-spacing:.015em;line-height:1.04}
.section-lead{font-size:16px;line-height:1.92;color:var(--paper-66)}
.section--paper .section-lead{color:var(--ink-70)}

.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid--split,.grid--split-r,.grid--cards{grid-template-columns:1fr}
@media (min-width:900px){
  .grid--split{grid-template-columns:7fr 5fr}
  .grid--split-r{grid-template-columns:5fr 7fr}
}
@media (min-width:640px){
  .grid--cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
}

/* ---------- panel ---------- */
.panel{
  position:relative;
  background:linear-gradient(180deg,rgba(244,240,228,.05),rgba(244,240,228,.014));
  border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(18px,2.2vw,28px);
  box-shadow:inset 0 1px 0 rgba(244,240,228,.05),0 20px 44px -34px rgba(0,0,0,.95);
  transition:border-color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.panel:hover{border-color:var(--line-strong)}
.panel--paper{background:var(--paper);color:var(--ink-70);border-color:var(--line-ink);box-shadow:0 18px 40px -34px rgba(11,31,26,.55)}
.panel--paper :where(h2,h3,h4){color:var(--ink)}
.panel__head{display:flex;align-items:baseline;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:16px}
.panel--paper .panel__head{border-bottom-color:var(--line-ink)}
.panel__title{font-size:clamp(18px,2.2vw,22px);letter-spacing:.03em}
.panel__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--paper-50)}
.panel--paper .panel__meta{color:var(--ink-50)}

/* ---------- data band ---------- */
.data-band{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.data-band__item{padding:18px 20px;border-right:1px solid var(--line)}
.data-band__item:last-child{border-right:0}
.data-band__num{display:block;font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(28px,4vw,46px);line-height:1;letter-spacing:-.02em;color:var(--mint)}
.data-band__label{display:block;margin-top:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--paper-50)}

/* ---------- media (image container base) ---------- */
.media{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r);background:var(--rock);aspect-ratio:16/10;isolation:isolate}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}
.media__img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04)}
.media__grid{
  position:absolute;inset:0;pointer-events:none;opacity:.4;
  background-image:linear-gradient(to right,rgba(244,240,228,.14) 1px,transparent 1px),linear-gradient(to bottom,rgba(244,240,228,.14) 1px,transparent 1px);
  background-size:24px 24px;mix-blend-mode:screen;
}
.media__scrim{position:absolute;inset:0;pointer-events:none;background:linear-gradient(200deg,rgba(11,31,26,0) 32%,rgba(11,31,26,.86) 100%)}
.media__tag{position:absolute;left:12px;bottom:12px;z-index:2}
.media__caption{position:absolute;right:12px;bottom:14px;z-index:2;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;color:var(--paper-66)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border:1px solid var(--line-strong);border-radius:999px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;line-height:1.6;color:var(--paper-66);
}
.tag--mint{color:var(--mint);border-color:rgba(88,242,176,.42);background:var(--mint-soft)}
.tag--signal{color:var(--signal);border-color:rgba(255,122,61,.44);background:var(--signal-soft)}
.tag--clay{color:#E3A184;border-color:rgba(184,107,75,.5);background:var(--clay-soft)}

/* ---------- prose & rule list ---------- */
.prose{max-width:36em;font-size:16px;line-height:1.94;color:var(--paper-78)}
.prose--narrow{max-width:29em}
.prose p+p{margin-top:1em}
.prose h3{margin-top:1.6em;margin-bottom:.5em;font-size:clamp(20px,2.4vw,26px);letter-spacing:.03em}
.section--paper .prose{color:var(--ink-70)}
.list-rule{display:grid}
.list-rule > li{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.list-rule > li:first-child{border-top:1px solid var(--line)}
.section--paper .list-rule > li{border-color:var(--line-ink)}

/* ---------- header ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:400;
  transform:translateY(-180%);
  padding:10px 16px;border-radius:2px;
  background:var(--mint);color:#06170F;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-decoration:none;
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(9,24,20,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  color:var(--paper);
}
.header-rail{background:rgba(7,19,15,.72);border-bottom:1px solid var(--line)}
.rail-inner{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-block:7px}
.rail-tag{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;color:var(--paper-50)}
.rail-dot{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 3px rgba(88,242,176,.16);animation:railPulse 2.6s var(--ease) infinite}
.rail-meta{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;color:var(--paper-50)}
.rail-key{color:var(--paper-34)}
.rail-num{color:var(--mint);font-variant-numeric:tabular-nums}
.rail-div{width:1px;height:10px;background:var(--line-strong)}
@keyframes railPulse{0%,100%{box-shadow:0 0 0 3px rgba(88,242,176,.16)}50%{box-shadow:0 0 0 6px rgba(88,242,176,.04)}}

.masthead{display:grid;padding-block:clamp(14px,2vw,22px) 0}
.masthead__top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--paper)}
.brand__mark{
  flex:0 0 auto;padding:4px 6px;border:1px solid rgba(88,242,176,.5);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--mint);
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.brand:hover .brand__mark{background:var(--mint-soft);border-color:var(--mint)}
.brand__text{display:block}
.brand__name{
  display:block;font-family:var(--font-display);font-weight:800;
  font-size:clamp(22px,3.4vw,30px);line-height:1.04;letter-spacing:.16em;
  color:var(--paper);
}
.brand__sub{display:block;margin-top:5px;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.24em;color:var(--paper-34)}

.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  padding:9px 12px;border:1px solid var(--line-strong);border-radius:var(--r);
  color:var(--paper);cursor:pointer;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint);background:var(--mint-soft)}
.nav-toggle__bars{display:grid;gap:3px;width:16px}
.nav-toggle__bars span{display:block;height:1.5px;background:currentColor;transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

.primary-nav{display:none;margin-top:14px;border-top:1px solid var(--line)}
.nav-list{display:flex;flex-direction:column}
.nav-link{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 2px;border-bottom:1px solid var(--line);
  font-size:15px;letter-spacing:.08em;color:var(--paper-66);text-decoration:none;
  transition:color var(--dur) var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:-1px;width:100%;height:1px;
  background:var(--mint);transform:scaleX(0);transform-origin:center;
  transition:transform 240ms var(--ease);
}
.nav-link:hover{color:var(--paper)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--mint)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.site-header[data-open="true"] .primary-nav{display:block;animation:navDrop var(--dur) var(--ease) both}
@keyframes navDrop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

.progress-rail{
  position:absolute;left:0;bottom:-1px;width:100%;height:2px;
  background:linear-gradient(90deg,var(--moss),var(--mint));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 90ms linear;
}

@media (min-width:900px){
  .masthead__top{justify-content:center}
  .nav-toggle{display:none}
  .primary-nav{display:block;margin-top:16px}
  .nav-list{flex-direction:row;flex-wrap:wrap;justify-content:center;gap:0 clamp(12px,2.2vw,28px)}
  .nav-link{display:inline-flex;padding:13px 2px;border-bottom:0;font-size:13px;letter-spacing:.14em}
  .brand__name{letter-spacing:.18em}
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--coal);
  border-top:1px solid var(--line);
  color:var(--paper-66);
  font-size:14px;
  padding-block:clamp(40px,6vw,72px) 0;
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:2px;
  background:linear-gradient(90deg,var(--moss),var(--mint) 42%,var(--signal));
  opacity:.62;
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:clamp(28px,4vw,44px);
  padding-block:clamp(8px,2vw,16px) clamp(32px,4vw,56px);
}
.footer-brand__name{font-family:var(--font-display);font-weight:800;font-size:clamp(22px,2.6vw,28px);letter-spacing:.16em;color:var(--paper)}
.footer-brand__desc{margin-top:14px;max-width:30em;font-size:13.5px;line-height:1.92;color:var(--paper-50)}
.footer-brand__sign{margin-top:16px;font-size:10.5px;letter-spacing:.2em;color:var(--mint)}
.footer-col__title{
  padding-bottom:12px;margin-bottom:16px;border-bottom:1px solid var(--line);
  font-family:var(--font-mono);font-size:10.5px;font-weight:500;letter-spacing:.22em;color:var(--paper-34);
}
.footer-list{display:grid;gap:10px}
.footer-list--plain li{display:grid;grid-template-columns:3.4em 1fr;gap:10px;align-items:start;font-size:13.5px;line-height:1.72}
.footer-key{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--moss);padding-top:3px}
.footer-link{
  color:var(--paper-66);text-decoration:none;
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--mint);border-bottom-color:rgba(88,242,176,.5)}
.footer-link--sm{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 22px;
  padding-block:18px 26px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.07em;color:var(--paper-34);
}
.footer-copy{max-width:none}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.to-top{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 13px;border:1px solid var(--line-strong);border-radius:var(--r);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--paper-66);
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),opacity var(--dur) var(--ease),visibility var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.to-top:hover{color:var(--mint);border-color:var(--mint);background:var(--mint-soft)}
.to-top[data-visible="false"]{opacity:0;visibility:hidden;pointer-events:none}
.to-top__arrow{color:var(--mint)}

@media (min-width:640px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (min-width:1024px){
  .footer-grid{grid-template-columns:1.5fr .9fr .9fr 1.25fr}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .btn:hover{transform:none}
  .rail-dot{animation:none}
}