:root{
  --pitch:#0B1A16;
  --stadium:#1D5C4A;
  --gold:#C9A227;
  --wine:#6B1F2A;
  --teal:#1E6976;
  --indigo:#3E2E5A;
  --paper:#F2EFE6;
  --sage:#A8B3AD;
  --font-display:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-data:"Roboto Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;
  --container-wide:1360px;
  --container-narrow:1120px;
  --header-h:76px;
  --grid-line:rgba(242,239,230,.026);
  --gold-line:rgba(201,162,39,.35);
  --speed-strip:repeating-linear-gradient(90deg,var(--gold) 0 18px,var(--wine) 18px 30px,var(--teal) 30px 46px);
}
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  min-height:100vh;
  padding-top:var(--header-h);
  background-color:var(--pitch);
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:48px 48px;
  color:var(--paper);
  font-family:var(--font-body);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{ font-family:var(--font-display); line-height:1.2; font-weight:900; color:var(--paper); }
a{ color:var(--gold); text-decoration:none; }
img{ max-width:100%; display:block; }
::selection{ background:var(--gold); color:var(--pitch); }
:focus-visible{ outline:2px solid var(--gold); outline-offset:2px; }

.container-wide{ width:100%; max-width:var(--container-wide); margin-inline:auto; padding-inline:clamp(1rem,2.5vw,2.5rem); }
.container{ width:100%; max-width:var(--container-narrow); margin-inline:auto; padding-inline:clamp(1rem,2.5vw,2.5rem); }
#main-content{ scroll-margin-top:calc(var(--header-h) + 16px); }

.skip-link{
  position:fixed;
  top:-120px;
  left:1rem;
  z-index:3000;
  background:var(--gold);
  color:var(--pitch);
  font-weight:700;
  padding:.75rem 1.25rem;
  transition:top .2s ease;
}
.skip-link:focus{ top:1rem; }

.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:3px;
  z-index:2001;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left;
  will-change:transform;
}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:1000;
  min-height:var(--header-h);
  background:rgba(11,26,22,.94);
  border-bottom:1px solid rgba(242,239,230,.08);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:var(--speed-strip);
}
.site-header.is-scrolled{ box-shadow:0 12px 32px rgba(0,0,0,.35); }
.header-bar{
  display:flex;
  align-items:center;
  gap:clamp(1rem,2vw,2rem);
  min-height:var(--header-h);
  position:relative;
}

.brand{ display:inline-flex; align-items:center; gap:.65rem; flex-shrink:0; color:var(--paper); }
.brand-mark{
  display:grid;
  place-items:center;
  width:40px;
  height:40px;
  background:var(--gold);
  color:var(--pitch);
  font-family:var(--font-data);
  font-weight:700;
  letter-spacing:.02em;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.05; }
.brand-name{ font-weight:900; font-size:1.02rem; letter-spacing:.02em; color:var(--paper); white-space:nowrap; }
.brand-sub{ margin-top:.25rem; font-size:.6rem; letter-spacing:.38em; color:var(--sage); }
.brand--footer .brand-name{ color:var(--gold); }

.nav-toggle{
  display:none;
  background:transparent;
  border:1px solid var(--gold-line);
  color:var(--paper);
  width:46px;
  height:46px;
  padding:0;
  margin-left:auto;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
}
.nav-toggle-bar{ display:block; width:20px; height:2px; background:var(--paper); transition:transform .3s ease,opacity .3s ease; }
.nav-toggle.is-active .nav-toggle-bar:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.nav-toggle.is-active .nav-toggle-bar:nth-child(2){ opacity:0; }
.nav-toggle.is-active .nav-toggle-bar:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }
.nav-toggle-label{ font-size:.6rem; letter-spacing:.12em; color:var(--sage); }

.main-nav{ display:flex; align-items:center; margin-inline:auto; }
.nav-list{ list-style:none; display:flex; align-items:center; gap:.25rem; }
.nav-link{
  display:flex;
  align-items:baseline;
  gap:.35rem;
  padding:.75rem .8rem;
  font-size:.9rem;
  font-weight:500;
  color:var(--sage);
  position:relative;
  transition:color .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:.8rem;
  right:.8rem;
  bottom:.3rem;
  height:2px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .25s ease;
}
.nav-link:hover{ color:var(--paper); }
.nav-link:hover::after{ transform:scaleX(1); }
.nav-index{ font-family:var(--font-data); font-size:.65rem; color:var(--gold); opacity:.75; }
.nav-link[aria-current="page"]{ color:var(--gold); }
.nav-link[aria-current="page"]::after{ transform:scaleX(1); }
.nav-link[aria-current="page"] .nav-index{ opacity:1; }

.nav-backdrop{
  position:fixed;
  inset:0;
  z-index:1490;
  background:rgba(5,9,8,.75);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease,visibility 0s .31s;
}
.main-nav[data-open] + .nav-backdrop{
  opacity:1;
  visibility:visible;
  transition:opacity .3s ease;
}

.header-aside{ display:flex; align-items:center; gap:1rem; }
.time-chip{
  font-family:var(--font-data);
  font-size:.8rem;
  letter-spacing:.1em;
  color:var(--gold);
  background:rgba(201,162,39,.06);
  border:1px solid var(--gold-line);
  padding:.35rem .7rem;
}
.search-box{ position:relative; }
.search-field{
  width:150px;
  padding:.45rem 1.6rem .45rem .75rem;
  background:transparent;
  border:1px solid rgba(168,179,173,.28);
  border-radius:0;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:.85rem;
  transition:border-color .2s ease,width .2s ease;
}
.search-field::placeholder{ color:var(--sage); opacity:.7; }
.search-field:focus{ outline:none; border-color:var(--gold); width:190px; }
.search-box::after{
  content:"⌕";
  position:absolute;
  right:.6rem;
  top:50%;
  transform:translateY(-50%);
  font-size:1rem;
  color:var(--gold);
  pointer-events:none;
}

.site-footer{
  margin-top:clamp(3rem,8vw,6rem);
  background:linear-gradient(180deg,rgba(20,16,38,.45),rgba(7,17,14,.95)),var(--pitch);
  border-top:2px solid var(--gold);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr;
  gap:clamp(2rem,5vw,4.5rem);
  padding-block:clamp(2.5rem,6vw,4.5rem);
}
.footer-brand .brand{ margin-bottom:1rem; }
.footer-about{ color:var(--sage); font-size:.95rem; max-width:38em; margin-bottom:1rem; }
.footer-contact{ color:var(--sage); font-size:.9rem; line-height:1.9; }
.footer-contact a{ color:var(--gold); }
.footer-heading{
  font-size:.85rem;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--gold);
  padding-bottom:.5rem;
  border-bottom:1px solid var(--gold-line);
  margin-bottom:1.5rem;
}
.footer-links{ list-style:none; }
.footer-links li{ margin-bottom:.8rem; }
.footer-links a{ color:var(--sage); font-size:.95rem; transition:color .2s ease,padding-left .2s ease; }
.footer-links a:hover{ color:var(--gold); padding-left:.35rem; }
.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.75rem 2rem;
  padding-block:1.25rem;
  border-top:1px solid rgba(242,239,230,.1);
  color:var(--sage);
  font-size:.85rem;
}
.footer-meta a{ color:var(--gold); }

.section{ padding-block:clamp(3rem,8vw,6rem); }
.section--stadium{ background:var(--stadium); }
.section--teal{ background:var(--teal); }
.section--indigo{ background:var(--indigo); }
.section--paper{ background:var(--paper); color:var(--pitch); }
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper h4{ color:var(--pitch); }

.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.75rem 1.5rem;
  border:1px solid transparent;
  border-radius:0;
  font-family:var(--font-body);
  font-weight:700;
  font-size:.9rem;
  line-height:1;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.button--primary{ background:var(--gold); color:var(--pitch); border-color:var(--gold); }
.button--primary:hover{ background:transparent; color:var(--gold); }
.button--ghost{ background:transparent; color:var(--gold); border-color:var(--gold); }
.button--ghost:hover{ background:var(--gold); color:var(--pitch); }
.button--wine{ background:var(--wine); color:var(--paper); border-color:var(--wine); }
.button--wine:hover{ background:transparent; color:var(--wine); }

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  list-style:none;
  padding:1.25rem 0;
  font-size:.9rem;
  color:var(--sage);
}
.breadcrumb li + li::before{ content:"/"; color:rgba(168,179,173,.5); margin:0 .75rem; }
.breadcrumb a{ color:var(--sage); transition:color .2s ease; }
.breadcrumb a:hover{ color:var(--gold); }
.breadcrumb [aria-current="page"]{ color:var(--gold); }

.chapter-label{
  display:flex;
  align-items:center;
  gap:1rem;
  font-family:var(--font-data);
  font-size:.85rem;
  letter-spacing:.25em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:1rem;
}
.chapter-label::before{ content:""; width:3rem; height:1px; background:var(--gold); flex:none; }
.chapter-no{
  font-family:var(--font-data);
  font-size:clamp(3.5rem,8vw,6rem);
  line-height:1;
  color:transparent;
  -webkit-text-stroke:1px var(--gold);
  margin-bottom:.5rem;
}
.display-title{ font-size:clamp(2rem,4vw,3.25rem); line-height:1.15; }
.lead{ font-size:1.05rem; color:var(--sage); max-width:38em; margin-top:.75rem; }

.prose{ color:var(--sage); font-size:.95rem; }
.prose h1,.prose h2,.prose h3,.prose h4{ margin-top:1.5em; margin-bottom:.5em; color:var(--paper); }
.prose p{ margin-bottom:1.25rem; }
.prose a{ color:var(--gold); }

.archive-card{
  position:relative;
  background:var(--stadium);
  border:1px solid var(--gold-line);
  padding:1.75rem;
  transition:border-color .2s ease;
}
.archive-card::before{ content:""; position:absolute; top:0; left:1.75rem; width:3rem; height:3px; background:var(--gold); }
.archive-card:hover{ border-color:var(--gold); }
.archive-card__no{
  font-family:var(--font-data);
  font-size:2.5rem;
  line-height:1.1;
  color:transparent;
  -webkit-text-stroke:1px rgba(201,162,39,.7);
}

.tag{
  display:inline-flex;
  align-items:center;
  padding:.25em .85em;
  font-size:.75rem;
  letter-spacing:.12em;
  color:var(--gold);
  border:1px solid var(--gold-line);
  background:rgba(201,162,39,.08);
}

.data-wrap{
  overflow-x:auto;
  border:1px solid rgba(242,239,230,.1);
  background:rgba(11,26,22,.4);
}
.table{
  width:100%;
  border-collapse:collapse;
  font-family:var(--font-data);
  font-size:.9rem;
}
.table th,.table td{ padding:.8rem 1rem; border-bottom:1px solid rgba(242,239,230,.08); text-align:left; white-space:nowrap; }
.table th{ color:var(--gold); font-weight:600; letter-spacing:.08em; }
.table tbody tr:hover{ background:rgba(201,162,39,.06); }

.figure-frame{
  position:relative;
  display:grid;
  place-items:center;
  overflow:hidden;
  aspect-ratio:4/3;
  min-height:180px;
  background:var(--stadium);
  background-image:
    linear-gradient(rgba(242,239,230,.08) 1px,transparent 1px),
    linear-gradient(90deg,rgba(242,239,230,.08) 1px,transparent 1px);
  background-size:24px 24px;
  border:1px solid var(--gold-line);
}
.figure-frame::before{ content:""; position:absolute; inset:10px; border:1px dashed var(--gold-line); pointer-events:none; }
.figure-frame[data-label]::after{
  content:attr(data-label);
  position:absolute;
  left:0;
  bottom:0;
  padding:.3rem .9rem;
  background:var(--wine);
  color:var(--paper);
  font-size:.75rem;
  letter-spacing:.1em;
}
.figure-frame--wide{ aspect-ratio:16/7; }
.figure-frame--tall{ aspect-ratio:3/4; }

.blueprint-grid{
  position:relative;
  border:1px solid var(--gold-line);
  background-image:
    linear-gradient(var(--grid-line) 1px,transparent 1px),
    linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);
  background-size:32px 32px;
}
.blueprint-grid::before{ content:""; position:absolute; inset:12px; border:1px solid rgba(242,239,230,.12); pointer-events:none; }

.speed-strip{ border:none; height:4px; background:var(--speed-strip); }

@media (max-width:1024px){
  .nav-toggle{ display:flex; }
  .header-aside{ display:none; }
  .main-nav{
    position:fixed;
    top:0;
    right:0;
    z-index:1500;
    display:block;
    width:min(340px,86vw);
    height:100vh;
    margin:0;
    padding:6rem 2rem 2rem;
    overflow-y:auto;
    background:linear-gradient(180deg,rgba(11,26,22,.98),rgba(30,105,118,.22)),var(--pitch);
    border-left:2px solid var(--gold);
    transform:translateX(105%);
    visibility:hidden;
    pointer-events:none;
    transition:transform .3s ease,visibility 0s .31s;
  }
  .main-nav[data-open]{
    transform:translateX(0);
    visibility:visible;
    pointer-events:auto;
    transition:transform .3s ease,visibility 0s;
  }
  .nav-list{ flex-direction:column; align-items:stretch; gap:0; }
  .nav-link{
    padding:1rem 0;
    font-size:1.1rem;
    border-bottom:1px solid rgba(242,239,230,.08);
  }
}
@media (max-width:900px){
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .footer-brand{ grid-column:1 / -1; }
}
@media (max-width:560px){
  .footer-grid{ grid-template-columns:1fr; }
  .footer-meta{ flex-direction:column; align-items:flex-start; }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation:none !important; transition-duration:.01ms !important; }
  .scroll-progress{ display:none; }
}