*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,address{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}

:root{
  --green-900:#0A1E19;
  --green-700:#14342B;
  --ivory-050:#F7F2E7;
  --ivory-100:#EDE3D0;
  --gold-500:#C9A227;
  --gold-300:#E6CD8B;
  --cinnabar-600:#B23A2B;
  --jade-500:#5E8C7A;
  --graphite-600:#47524C;
  --ink-900:#101512;

  --line-gold:rgba(201,162,39,.42);
  --line-gold-soft:rgba(201,162,39,.22);
  --line-dark:rgba(201,162,39,.28);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"PingFang SC","Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --fs-64:clamp(2.6rem,5.6vw,4rem);
  --fs-48:clamp(2rem,4.2vw,3rem);
  --fs-34:clamp(1.6rem,2.8vw,2.125rem);
  --fs-24:1.5rem;
  --fs-17:1.0625rem;
  --fs-15:.9375rem;
  --fs-13:.8125rem;
  --fs-12:.75rem;

  --rail-w:88px;
  --header-h:56px;
  --status-h:40px;
  --container:1320px;
  --gutter:clamp(1.25rem,4vw,4.5rem);
  --ease:cubic-bezier(.2,.7,.2,1);
}

body{
  background:var(--ivory-050);
  color:var(--ink-900);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  padding-bottom:var(--status-h);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
@media (min-width:1081px){
  body{padding-left:var(--rail-w);font-size:var(--fs-17)}
}

:focus-visible{outline:2px solid var(--gold-500);outline-offset:3px}
.section--dark :focus-visible,.section--deep :focus-visible,.site-footer :focus-visible{outline-color:var(--gold-300)}

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

.skip-link{
  position:fixed;left:50%;top:0;z-index:300;
  transform:translate(-50%,-140%);
  background:var(--green-900);color:var(--ivory-050);
  border:1px solid var(--gold-500);
  padding:.7rem 1.4rem;
  font-size:var(--fs-13);letter-spacing:.12em;
  transition:transform .2s var(--ease);
}
.skip-link:focus{transform:translate(-50%,0)}

/* ---------- layout utilities ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter)}
.container--wide{max-width:1560px}
.section{padding-block:clamp(2.75rem,6.5vw,6rem)}
.section--dark{background:var(--green-900);color:var(--ivory-050)}
.section--deep{background:var(--green-700);color:var(--ivory-050)}
.section--ivory{background:var(--ivory-100)}
.rule{height:1px;background:var(--line-gold);border:0;margin:0}
.section--dark .rule,.section--deep .rule{background:var(--line-dark)}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(1rem,2.4vw,2.25rem)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 6}
}

/* ---------- type ---------- */
.mono{font-family:var(--font-mono);font-weight:500;letter-spacing:.04em;font-variant-numeric:tabular-nums}

.h-display,.h-48,.h-34,.h-24{font-family:var(--font-display);font-weight:300;color:inherit}
.h-display{font-size:var(--fs-64);line-height:1.08;letter-spacing:.02em}
.h-48{font-size:var(--fs-48);line-height:1.14;letter-spacing:.02em}
.h-34{font-size:var(--fs-34);line-height:1.24;letter-spacing:.03em}
.h-24{font-size:var(--fs-24);line-height:1.36;letter-spacing:.04em;font-weight:400}

.eyebrow{
  display:inline-flex;align-items:center;gap:.75em;
  font-family:var(--font-mono);font-weight:500;
  font-size:var(--fs-12);letter-spacing:.24em;
  color:var(--graphite-600);text-transform:uppercase;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--gold-500)}
.section--dark .eyebrow,.section--deep .eyebrow{color:var(--gold-300)}

.lede{
  font-family:var(--font-display);font-weight:300;
  font-size:var(--fs-24);line-height:1.62;letter-spacing:.02em;
  color:var(--graphite-600);max-width:34ch;
}
.section--dark .lede,.section--deep .lede{color:rgba(247,242,231,.78)}

.prose{color:var(--graphite-600)}
.prose p{max-width:36em}
.prose p + p{margin-top:.9em}
.prose strong{color:var(--ink-900);font-weight:500}
.section--dark .prose,.section--deep .prose{color:rgba(247,242,231,.76)}
.section--dark .prose strong,.section--deep .prose strong{color:var(--ivory-050)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.6em;
  padding:.85rem 1.5rem;
  font-size:var(--fs-13);letter-spacing:.14em;
  border:1px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn--gold{border-color:var(--gold-500);color:var(--gold-500)}
.btn--gold:hover,.btn--gold:focus-visible{background:var(--gold-500);color:var(--green-900)}
.btn--solid{background:var(--gold-500);color:var(--green-900);border-color:var(--gold-500)}
.btn--solid:hover,.btn--solid:focus-visible{background:var(--gold-300);border-color:var(--gold-300)}
.btn--cinnabar{border-color:var(--cinnabar-600);color:var(--cinnabar-600)}
.btn--cinnabar:hover,.btn--cinnabar:focus-visible{background:var(--cinnabar-600);color:var(--ivory-050)}
.btn--ghost{border-color:var(--line-gold);color:var(--ivory-050)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:rgba(201,162,39,.16);border-color:var(--gold-300)}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.1em .6em;
  font-family:var(--font-mono);font-weight:500;
  font-size:var(--fs-12);letter-spacing:.12em;
  border:1px solid currentColor;
}
.tag--update{color:var(--cinnabar-600)}
.tag--version{color:var(--jade-500)}
.tag--rule{color:var(--gold-500)}
.section--dark .tag--rule,.section--deep .tag--rule{color:var(--gold-300)}

/* ---------- breadcrumb ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.55em;font-size:var(--fs-12);letter-spacing:.16em;color:var(--graphite-600)}
.breadcrumb li{display:inline-flex;align-items:center;gap:.55em}
.breadcrumb li + li::before{content:"/";color:rgba(71,82,76,.45)}
.breadcrumb a:hover{color:var(--ink-900)}
.section--dark .breadcrumb,.section--deep .breadcrumb{color:rgba(247,242,231,.6)}

/* ---------- glass panel ---------- */
.glass-panel{
  background:rgba(247,242,231,.07);
  -webkit-backdrop-filter:blur(10px) saturate(120%);
  backdrop-filter:blur(10px) saturate(120%);
  border:1px solid rgba(230,205,139,.32);
  padding:clamp(1.25rem,2.4vw,2rem);
}
.section--dark .glass-panel,.section--deep .glass-panel{box-shadow:inset 0 1px 0 rgba(247,242,231,.08)}

/* ---------- index list ---------- */
.index-list{border-top:1px solid var(--line-gold)}
.index-item{
  display:grid;grid-template-columns:56px minmax(0,1fr) auto;
  align-items:baseline;gap:1rem;
  padding:.95rem 0;
  border-bottom:1px solid var(--line-gold-soft);
  transition:background-color .2s var(--ease);
}
.index-item:hover{background:rgba(201,162,39,.06)}
.index-num{font-family:var(--font-mono);font-weight:500;font-size:var(--fs-12);letter-spacing:.1em;color:var(--gold-500)}
.index-name{font-family:var(--font-display);font-size:var(--fs-24);font-weight:400;letter-spacing:.03em;line-height:1.3}
.index-note{font-size:var(--fs-13);color:var(--graphite-600);letter-spacing:.04em}
@media (max-width:600px){
  .index-item{grid-template-columns:44px minmax(0,1fr);gap:.75rem}
  .index-note{grid-column:2}
}

/* ---------- figures ---------- */
.figure{position:relative;overflow:hidden;border:1px solid var(--line-gold);background:var(--green-700)}
.figure-media{position:relative;width:100%;aspect-ratio:4/3;overflow:hidden;background:
  radial-gradient(120% 90% at 20% 0%,rgba(201,162,39,.22),transparent 60%),
  linear-gradient(160deg,var(--green-700),var(--green-900) 70%)}
.figure--wide .figure-media{aspect-ratio:16/9}
.figure--tall .figure-media{aspect-ratio:3/4}
.figure-media img,.figure-media svg{width:100%;height:100%;object-fit:cover}
.figure-caption{
  display:flex;justify-content:space-between;gap:1rem;
  padding:.7rem .9rem;
  font-size:var(--fs-12);letter-spacing:.14em;
  color:rgba(247,242,231,.72);
  background:var(--green-900);
  border-top:1px solid var(--line-dark);
}
@media (max-width:600px){
  .figure-media,.figure--wide .figure-media{aspect-ratio:3/2}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--ivory-050);
  border-bottom:1px solid var(--line-gold);
}
.header-inner{
  display:flex;align-items:center;gap:clamp(.75rem,2vw,2rem);
  width:100%;height:48px;
  padding-inline:var(--gutter);
}
@media (min-width:1081px){.header-inner{height:var(--header-h)}}

.brand{display:inline-flex;align-items:center;gap:.6rem;flex-shrink:0}
.brand-mark{
  width:8px;height:8px;flex:0 0 8px;
  background:var(--cinnabar-600);
  transform:rotate(45deg);
}
.brand-text{display:inline-flex;flex-direction:column;line-height:1.1}
.brand-name{
  font-family:var(--font-display);font-weight:400;
  font-size:var(--fs-15);letter-spacing:.14em;color:var(--ink-900);
}
.brand-sub{font-size:10px;letter-spacing:.2em;color:var(--graphite-600);margin-top:2px}

.site-nav{display:flex;flex:1;justify-content:center}
.nav-list{display:flex;align-items:center;gap:clamp(.9rem,1.9vw,1.9rem)}
.nav-item{display:flex}
.nav-num{display:none}
.nav-link{
  position:relative;display:inline-block;
  padding:.35rem 0;
  font-size:var(--fs-13);letter-spacing:.08em;
  color:var(--graphite-600);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;
  background:var(--gold-500);
  transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--ink-900);font-weight:500}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

.header-end{display:flex;align-items:center;gap:.6rem;margin-left:auto}
.header-cta{
  display:inline-flex;align-items:center;
  padding:.4rem .9rem;
  font-size:var(--fs-12);letter-spacing:.14em;
  color:var(--cinnabar-600);
  border:1px solid var(--cinnabar-600);
  transition:background-color .2s var(--ease),color .2s var(--ease);
  white-space:nowrap;
}
.header-cta:hover,.header-cta:focus-visible{background:var(--cinnabar-600);color:var(--ivory-050)}

.nav-toggle{
  display:none;width:36px;height:36px;
  align-items:center;justify-content:center;
  border:1px solid var(--line-gold);
}
.nav-toggle-bars{position:relative;display:block;width:16px;height:1px;background:var(--ink-900);transition:background-color .2s var(--ease)}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:16px;height:1px;background:var(--ink-900);
  transition:transform .26s var(--ease);
}
.nav-toggle-bars::before{top:-5px}
.nav-toggle-bars::after{top:5px}
.site-header[data-open] .nav-toggle-bars{background:transparent}
.site-header[data-open] .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg)}

.progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden;pointer-events:none}
.progress-bar{
  display:block;height:100%;width:100%;
  background:var(--gold-500);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .12s linear;
}

/* ---------- left rail ---------- */
.rail{display:none}
@media (min-width:1081px){
  .rail{
    display:flex;
    position:fixed;left:0;top:var(--header-h);bottom:var(--status-h);
    width:var(--rail-w);
    background:var(--ivory-050);
    border-right:1px solid var(--line-gold);
    z-index:90;
  }
}
.rail-inner{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:1.5rem;width:100%;padding:1.75rem 0;
}
.rail-list{display:flex;flex-direction:column;gap:.15rem;width:100%;align-items:center}
.rail-link{position:relative;display:flex;align-items:center;justify-content:center;width:100%;height:38px}
.rail-num{font-size:11px;letter-spacing:.1em;color:var(--graphite-600);transition:color .25s var(--ease),font-weight .2s}
.rail-link::before{
  content:"";position:absolute;left:0;top:50%;width:14px;height:1px;
  background:var(--gold-500);transform:translateY(-50%) scaleX(0);transform-origin:left;
  transition:transform .25s var(--ease);
}
.rail-link:hover .rail-num{color:var(--gold-500)}
.rail-link:hover::before{transform:translateY(-50%) scaleX(1)}
.rail-link[aria-current="page"] .rail-num{color:var(--gold-500);font-weight:700}
.rail-link[aria-current="page"]::before{transform:translateY(-50%) scaleX(1)}
.rail-label{
  position:absolute;left:calc(100% + 10px);top:50%;
  transform:translateY(-50%) translateX(-4px);
  white-space:nowrap;
  padding:.25em .7em;
  font-size:var(--fs-12);letter-spacing:.16em;
  background:var(--green-900);color:var(--ivory-050);
  border:1px solid var(--gold-500);
  opacity:0;pointer-events:none;
  transition:opacity .2s var(--ease),transform .2s var(--ease);
  z-index:5;
}
.rail-link:hover .rail-label,.rail-link:focus-visible .rail-label{opacity:1;transform:translateY(-50%) translateX(0)}
.rail-foot{
  writing-mode:vertical-rl;
  font-size:11px;letter-spacing:.32em;
  color:rgba(71,82,76,.55);
  margin-top:.5rem;
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:var(--green-900);
  color:rgba(247,242,231,.8);
  border-top:1px solid var(--gold-500);
}
.footer-inner{padding-block:clamp(2.5rem,5vw,4.5rem)}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.4fr 1fr;
  gap:clamp(1.5rem,3vw,3rem);
}
.footer-col--brand{display:flex;flex-direction:column;gap:.9rem}
.brand--footer .brand-name{color:var(--ivory-050)}
.footer-tagline{
  font-family:var(--font-display);font-weight:300;
  font-size:var(--fs-24);line-height:1.4;letter-spacing:.06em;
  color:var(--ivory-050);
}
.footer-meta{font-size:var(--fs-12);letter-spacing:.14em;color:var(--gold-300)}
.footer-heading{
  font-family:var(--font-mono);font-weight:500;
  font-size:var(--fs-12);letter-spacing:.22em;
  color:var(--gold-300);
  margin-bottom:1rem;
}
.footer-nav{display:flex;flex-direction:column;gap:.55rem}
.footer-nav a{
  font-size:var(--fs-15);letter-spacing:.04em;
  color:rgba(247,242,231,.78);
  transition:color .2s var(--ease);
}
.footer-nav a:hover,.footer-nav a:focus-visible{color:var(--gold-300)}
.footer-contact{display:flex;flex-direction:column;gap:.6rem}
.contact-line{
  display:grid;grid-template-columns:3.4em minmax(0,1fr);
  gap:.5rem;align-items:baseline;
  font-size:var(--fs-13);letter-spacing:.03em;
  color:rgba(247,242,231,.82);
  word-break:break-word;
}
.contact-key{font-family:var(--font-mono);font-size:var(--fs-12);letter-spacing:.14em;color:rgba(230,205,139,.8)}
.footer-note{margin-top:1rem;font-size:var(--fs-12);line-height:1.7;letter-spacing:.06em;color:rgba(247,242,231,.55);max-width:26em}
.footer-legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:.75rem;
  margin-top:clamp(2rem,4vw,3.25rem);
  padding-top:1.15rem;
  border-top:1px solid var(--line-dark);
  font-size:var(--fs-12);letter-spacing:.12em;
  color:rgba(247,242,231,.55);
}
@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .footer-legal{flex-direction:column}
}

/* ---------- status bar ---------- */
.status-bar{
  position:fixed;left:0;right:0;bottom:0;
  height:var(--status-h);
  display:flex;align-items:center;
  background:var(--green-900);
  border-top:1px solid var(--line-dark);
  z-index:95;
}
@media (min-width:1081px){.status-bar{left:var(--rail-w)}}
.status-inner{
  display:flex;align-items:center;gap:clamp(1rem,3vw,2.75rem);
  width:100%;padding-inline:var(--gutter);
  font-size:var(--fs-12);letter-spacing:.12em;
  color:rgba(247,242,231,.7);
}
.status-item{display:inline-flex;align-items:baseline;gap:.45em;white-space:nowrap}
.status-key{color:var(--gold-300)}
.status-item--end{margin-left:auto}
@media (max-width:760px){
  .status-item:nth-child(2),.status-item:nth-child(3){display:none}
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
[data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- mobile nav ---------- */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:48px;left:0;right:0;
    max-height:calc(100vh - 48px - var(--status-h));
    overflow-y:auto;
    display:block;
    background:var(--green-900);
    border-bottom:1px solid var(--gold-500);
    padding:1.25rem var(--gutter) 1.75rem;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease);
  }
  .site-header[data-open] .site-nav{
    opacity:1;visibility:visible;transform:none;pointer-events:auto;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-item{border-bottom:1px solid rgba(201,162,39,.22)}
  .nav-link{
    display:flex;align-items:baseline;gap:.9rem;
    width:100%;padding:.9rem 0;
    font-size:var(--fs-15);letter-spacing:.1em;
    color:rgba(247,242,231,.86);
  }
  .nav-num{display:inline;font-size:11px;letter-spacing:.1em;color:rgba(230,205,139,.7);min-width:1.8em}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--gold-300);font-weight:500}
  .nav-link[aria-current="page"] .nav-num{color:var(--gold-300)}
  .header-cta{padding:.35rem .65rem;font-size:11px;letter-spacing:.1em}
  .brand-name{font-size:var(--fs-13)}
  .brand-sub{display:none}
}
@media (max-width:380px){
  .header-cta{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .progress-bar{transition:none !important}
  .nav-link::after,.rail-link::before{transition:none !important}
}