*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0}
a{color:inherit}
main{display:block}
#main-content:focus{outline:none}

:root{
  --ink:#101A33;
  --ink-deep:#070D1A;
  --paper:#F4EBDC;
  --paper-ink:#1B2233;
  --gold:#E8B44A;
  --yak:#6B4B36;
  --teal:#2FA9A0;
  --crimson:#D9483F;
  --saffron:#F2C94C;
  --maroon:#8C2F49;
  --mist:#8C9AB5;
  --live:#7FB069;
  --rail-w:88px;
  --edge:clamp(16px,4vw,48px);
  --maxw:1240px;
  --radius:14px;
  --hair:rgba(232,180,74,.22);
  --font-display:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"IBM Plex Mono","DIN Alternate",Menlo,Consolas,monospace;
}

::selection{background:var(--gold);color:#1B1206}

body{
  min-height:100dvh;
  background-color:var(--ink);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(244,235,220,.055) 1px, transparent 0),
    radial-gradient(1000px 520px at 92% -8%, rgba(232,180,74,.16), transparent 62%),
    radial-gradient(760px 460px at 4% 104%, rgba(47,169,160,.12), transparent 66%);
  background-size:22px 22px,auto,auto;
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
}
body.is-locked{overflow:hidden}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;letter-spacing:-.02em;line-height:1.12}
h1{font-size:clamp(34px,5.6vw,64px)}
h2{font-size:clamp(24px,3vw,36px)}
h3{font-size:clamp(18px,2vw,22px);font-weight:800}
p{max-width:68ch}
strong{font-weight:800;color:var(--saffron)}
:focus-visible{outline:2px solid var(--saffron);outline-offset:3px;border-radius:4px}

.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;left:10px;top:-120px;z-index:200;
  padding:10px 18px;border-radius:0 0 10px 10px;
  background:var(--gold);color:#1B1206;
  font-weight:800;font-size:13px;letter-spacing:.08em;text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:0}

/* ---------- header / rail ---------- */
.site-header{position:relative;z-index:90}
.rail{
  position:sticky;top:0;z-index:90;
  background:linear-gradient(180deg,rgba(7,13,26,.94),rgba(16,26,51,.86));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--hair);
}
.rail__top{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px var(--edge);
}
.rail__quick{display:flex;align-items:center;gap:8px}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;color:var(--paper);
}
.brand__mark{
  display:grid;place-items:center;
  width:34px;height:34px;border-radius:10px;
  background:var(--gold);color:#1B1206;
  font-weight:900;font-size:18px;line-height:1;
  font-family:var(--font-display);
  box-shadow:0 0 0 1px rgba(7,13,26,.5), 0 8px 20px -10px rgba(232,180,74,.9);
}
.brand__text{
  display:flex;flex-direction:column;gap:2px;
  font-family:var(--font-display);font-weight:800;
  font-size:15px;letter-spacing:.04em;line-height:1.1;
}
.brand__sub{
  font-family:var(--font-mono);font-weight:400;
  font-size:9px;letter-spacing:.28em;color:var(--mist);
}

.nav-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 13px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(232,180,74,.42);
  background:rgba(244,235,220,.06);
  color:var(--paper);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  transition:border-color .25s ease,color .25s ease,background .25s ease;
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold)}
.nav-toggle__bar{position:relative;display:block;width:16px;height:2px;border-radius:2px;background:currentColor}
.nav-toggle__bar::before,
.nav-toggle__bar::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:currentColor;transition:transform .28s cubic-bezier(.2,.8,.2,1),opacity .2s ease;
}
.nav-toggle__bar::before{top:-5px}
.nav-toggle__bar::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after{transform:translateY(-5px) rotate(-45deg)}

.rail__panel{
  position:fixed;top:0;bottom:0;left:0;z-index:95;
  width:min(86vw,308px);
  display:flex;flex-direction:column;gap:20px;
  padding:26px 20px 28px;
  overflow-y:auto;
  background:linear-gradient(180deg,#0A1224,#101A33 72%,#0A1224);
  border-right:1px solid rgba(232,180,74,.3);
  box-shadow:28px 0 60px -30px rgba(0,0,0,.9);
  transform:translateX(-102%);
  transition:transform .28s cubic-bezier(.2,.8,.2,1);
}
.rail[data-open="true"] .rail__panel{transform:translateX(0)}
.rail__kicker{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.28em;
  color:var(--gold);padding-bottom:12px;
  border-bottom:1px solid rgba(232,180,74,.28);
}
.rail__scrim{
  position:fixed;inset:0;z-index:88;
  background:rgba(7,13,26,.62);
  opacity:0;pointer-events:none;
  transition:opacity .28s ease;
}
.rail__scrim[data-active="true"]{opacity:1;pointer-events:auto}

.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-link{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:13px 12px;border-radius:10px;
  border:1px solid transparent;
  color:var(--paper);text-decoration:none;
  font-size:15px;letter-spacing:.06em;
  transition:background .25s ease,color .25s ease,border-color .25s ease;
}
.nav-link__idx{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--mist);transition:color .25s ease;
}
.nav-link__label{flex:1}
.nav-link:hover{background:rgba(244,235,220,.07);border-color:rgba(232,180,74,.28)}
.nav-link:hover .nav-link__idx{color:var(--gold)}
.nav-link[aria-current="page"]{
  color:var(--gold);
  background:rgba(232,180,74,.1);
  border-color:rgba(232,180,74,.42);
}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--gold)}

.rail__actions{display:flex;flex-direction:column;gap:10px;margin-top:auto}
.rail__btn{justify-content:center}
.rail__note{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  color:var(--mist);text-align:center;margin-top:4px;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;
  border:1px solid transparent;
  font-size:14px;font-weight:600;letter-spacing:.08em;line-height:1.2;
  text-decoration:none;cursor:pointer;
  transition:background .25s ease,color .25s ease,border-color .25s ease,transform .2s ease;
}
.btn--gold{background:var(--gold);color:#20160A;border-color:var(--gold);font-weight:800}
.btn--gold:hover{background:#F3C662;border-color:#F3C662}
.btn--gold:active{transform:translateY(1px)}
.btn--ghost{background:rgba(244,235,220,.05);color:var(--paper);border-color:rgba(232,180,74,.42)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold)}
.btn--sm{padding:8px 14px;font-size:12px;letter-spacing:.12em}
.btn--block{width:100%}

/* ---------- footer ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,96px);
  padding:clamp(38px,5vw,66px) var(--edge) 0;
  background:linear-gradient(180deg,rgba(10,18,36,.35),rgba(7,13,26,.98) 42%),var(--ink-deep);
  border-top:1px solid var(--hair);
  color:var(--paper);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:5px;
  background:linear-gradient(90deg,var(--teal),var(--saffron) 26%,var(--crimson) 52%,var(--paper) 74%,var(--maroon));
  opacity:.78;
}
.footer__grid{
  max-width:var(--maxw);margin:0 auto;
  display:grid;gap:clamp(26px,4vw,48px);
  grid-template-columns:1fr;
}
.footer__col{min-width:0}
.footer__brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--paper)}
.footer__mark{
  display:grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:var(--gold);color:#1B1206;
  font-family:var(--font-display);font-weight:900;font-size:18px;line-height:1;
}
.footer__brandtext{font-family:var(--font-display);font-weight:800;font-size:15px;letter-spacing:.06em}
.footer__desc{margin-top:14px;max-width:34ch;font-size:14px;color:rgba(244,235,220,.72);line-height:1.7}
.footer__stamp{
  margin-top:12px;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.16em;color:var(--mist);
}
.footer__title{
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.26em;color:var(--gold);
  margin-bottom:14px;
}
.footer__list{display:flex;flex-direction:column;gap:10px;font-size:14px;color:rgba(244,235,220,.8)}
.footer__link{
  text-decoration:none;border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .2s ease,border-color .2s ease;
}
.footer__link:hover{color:var(--gold);border-color:rgba(232,180,74,.6)}
.footer__list--plain{gap:12px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;color:rgba(244,235,220,.78)}
.footer__kv{
  display:inline-block;min-width:3.4em;margin-right:8px;
  font-size:10px;letter-spacing:.2em;color:var(--mist);
}
.footer__note{margin-top:14px;max-width:30ch;font-size:12px;color:var(--mist);line-height:1.6}
.footer__bottom{
  max-width:var(--maxw);margin:clamp(28px,4vw,44px) auto 0;
  padding:16px 0 24px;
  border-top:1px solid rgba(244,235,220,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;align-items:center;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.08em;color:var(--mist);
}
.footer__copy,.footer__marks{margin:0;max-width:none}
.footer__marks{display:inline-flex;align-items:center;gap:4px}
.mark-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--mist)}
.mark-dot--teal{background:var(--teal);margin-left:6px}
.mark-dot--crimson{background:var(--crimson);margin-left:10px}

/* ---------- layout helpers ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--edge)}
.section{padding-block:clamp(40px,6vw,84px)}
.grid{display:grid;gap:clamp(16px,2.5vw,28px)}
.grid--split{grid-template-columns:1fr}
.grid--three{grid-template-columns:1fr}
.rule{height:1px;border:0;margin:clamp(20px,3vw,34px) 0;background:linear-gradient(90deg,rgba(232,180,74,.65),rgba(232,180,74,0))}

/* ---------- editorial bits ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--gold);
}
.eyebrow::before{content:"";width:24px;height:1px;background:currentColor;opacity:.7}

.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--mist);
}
.crumb a{text-decoration:none;color:inherit}
.crumb a:hover{color:var(--gold)}
.crumb__sep{opacity:.45}
.crumb__current{color:var(--gold)}

.index-band{
  display:flex;flex-wrap:wrap;gap:8px;
  padding:14px 0;
  border-top:1px solid var(--hair);
  border-bottom:1px solid var(--hair);
}
.index-band__link{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 13px;border-radius:999px;
  border:1px solid rgba(244,235,220,.16);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--paper);text-decoration:none;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.index-band__link:hover,.index-band__link[aria-current="true"]{
  color:var(--gold);border-color:rgba(232,180,74,.6);background:rgba(232,180,74,.08);
}
.index-band__num{color:var(--gold)}

/* ---------- surfaces ---------- */
.paper-panel{
  background:var(--paper);color:var(--paper-ink);
  border-radius:var(--radius);
  padding:clamp(20px,3vw,38px);
  box-shadow:0 26px 60px -32px rgba(7,13,26,.95);
}
.paper-panel h2,.paper-panel h3{color:var(--paper-ink)}
.paper-panel .eyebrow{color:var(--maroon)}
.glass-card{
  background:rgba(244,235,220,.06);
  border:1px solid rgba(232,180,74,.28);
  border-radius:var(--radius);
  padding:clamp(18px,2.6vw,30px);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 22px 54px -34px rgba(0,0,0,.9);
}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;
  border:1px solid currentColor;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--mist);
}
.tag--teal{color:var(--teal)}
.tag--crimson{color:var(--crimson)}
.tag--gold{color:var(--gold)}

/* ---------- data ---------- */
.metric{display:flex;align-items:baseline;gap:2px;font-family:var(--font-mono)}
.metric__value{
  font-size:clamp(28px,4vw,46px);font-weight:700;letter-spacing:-.02em;
  color:var(--paper);line-height:1;
}
.metric__unit{font-size:12px;letter-spacing:.16em;color:var(--mist);margin-left:.15em}
.paper-panel .metric__value{color:var(--paper-ink)}
.data-bar{
  position:relative;height:10px;border-radius:999px;overflow:hidden;
  background:rgba(244,235,220,.12);
}
.data-bar__fill{
  display:block;height:100%;width:var(--value,50%);
  border-radius:inherit;background:var(--teal);
  transition:width .4s ease;
}
.data-bar--crimson .data-bar__fill{background:var(--crimson)}
.data-bar--gold .data-bar__fill{background:var(--gold)}
.paper-panel .data-bar{background:rgba(27,34,51,.16)}

/* ---------- figure ---------- */
.figure{
  position:relative;margin:0;overflow:hidden;
  border-radius:var(--radius);
  aspect-ratio:16/10;
  display:grid;align-items:end;
  background:linear-gradient(142deg,#1B2A4A,#0A1224 56%,#24344F);
  border:1px solid rgba(232,180,74,.18);
}
.figure::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:radial-gradient(circle at 1px 1px, rgba(244,235,220,.16) 1px, transparent 0);
  background-size:14px 14px;
}
.figure__inner{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.figure__caption{
  position:relative;z-index:2;width:100%;margin:0;
  padding:12px 16px;
  font-size:12px;letter-spacing:.06em;color:rgba(244,235,220,.84);
  background:linear-gradient(0deg,rgba(7,13,26,.9),rgba(7,13,26,0));
}
.figure--tall{aspect-ratio:3/4}

/* ---------- prose ---------- */
.prose{max-width:68ch}
.prose p{margin-bottom:1em}
.prose h2{margin:1.6em 0 .55em}
.prose h3{margin:1.4em 0 .5em;color:var(--gold)}
.prose ul{display:flex;flex-direction:column;gap:.45em;margin-bottom:1em}
.prose li{padding-left:1.1em;position:relative}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:1px;background:var(--gold)}
.prose blockquote{
  margin:1.2em 0;padding:14px 18px;
  border-left:3px solid var(--yak);
  background:rgba(107,75,54,.16);
  color:rgba(244,235,220,.9);
}
.paper-panel .prose li::before{background:var(--maroon)}
.paper-panel .prose blockquote{background:rgba(107,75,54,.1);color:var(--paper-ink)}

/* ---------- injected: progress + back to top ---------- */
.read-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:120;
  background:rgba(244,235,220,.08);pointer-events:none;
}
.read-progress__fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--teal),var(--gold) 58%,var(--crimson));
}
.to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:110;
  display:grid;place-items:center;
  width:46px;height:46px;border-radius:50%;cursor:pointer;
  border:1px solid rgba(232,180,74,.55);
  background:rgba(7,13,26,.82);color:var(--gold);
  font-family:var(--font-mono);font-size:16px;
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .25s ease,transform .25s ease,border-color .25s ease,color .25s ease;
}
.to-top.is-visible{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--gold);color:var(--paper)}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- breakpoints ---------- */
@media (max-width:379px){
  .nav-toggle__text{display:none}
  .brand__sub{display:none}
}

@media (min-width:640px){
  .footer__grid{grid-template-columns:repeat(2,1fr)}
}

@media (min-width:720px){
  .grid--three{grid-template-columns:repeat(3,1fr)}
}

@media (min-width:860px){
  .grid--split{grid-template-columns:1.15fr .85fr}
}

@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .read-progress{left:var(--rail-w)}
  .rail{
    position:fixed;inset:0 auto 0 0;
    width:var(--rail-w);height:100dvh;
    display:flex;flex-direction:column;
    border-bottom:0;border-right:1px solid rgba(232,180,74,.24);
    border-radius:0;
  }
  .rail__top{
    flex-direction:column;gap:0;
    padding:22px 0 18px;
    border-bottom:1px solid rgba(232,180,74,.18);
    width:100%;
  }
  .rail__quick{display:none}
  .brand{flex-direction:column;gap:8px}
  .brand__text{align-items:center;font-size:13px;letter-spacing:.06em}
  .brand__sub{font-size:8px;letter-spacing:.16em}
  .rail__panel{
    position:static;transform:none;z-index:auto;
    width:100%;flex:1;
    padding:16px 0 18px;
    background:none;border:0;box-shadow:none;
    align-items:center;justify-content:space-between;gap:14px;
    overflow-y:auto;scrollbar-width:none;
  }
  .rail__panel::-webkit-scrollbar{display:none}
  .rail[data-open="true"] .rail__panel{transform:none}
  .rail__kicker,.rail__note{display:none}
  .rail__scrim{display:none}
  .nav-toggle{display:none}
  .rail__nav{width:100%}
  .nav-list{align-items:center;gap:4px}
  .nav-list__item{width:100%;display:flex;justify-content:center}
  .nav-link{
    flex-direction:column;align-items:center;gap:4px;
    width:70px;padding:10px 4px;border-radius:10px;
    font-size:13px;letter-spacing:.1em;text-align:center;
  }
  .nav-link__idx{font-size:10px;letter-spacing:.08em}
  .nav-link__label{flex:none;writing-mode:vertical-rl;line-height:1.15;letter-spacing:.18em}
  .nav-link[aria-current="page"]::before{
    content:"";position:absolute;left:-9px;top:8px;bottom:8px;width:3px;
    border-radius:2px;background:var(--gold);
  }
  .rail__actions{flex-direction:column;align-items:center;gap:8px;width:100%;padding:0 6px 4px}
  .rail__actions .rail__btn{
    writing-mode:vertical-rl;width:auto;
    padding:15px 6px;font-size:11px;letter-spacing:.16em;border-radius:999px;
  }
  .footer__grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .rail__panel{transition:none}
}