:root{
  --red:#C8322B;
  --gold:#D9A441;
  --orange:#E66A2C;
  --cream:#F7F1E5;
  --ink:#1F1A17;
  --brown:#4A3428;
  --jade:#2F7D5C;
  --blue:#2A5C9A;
  --bronze:#C9B79C;
  --night:#0F0D0B;
  --rail-w:272px;
  --strip-h:58px;
  --line:rgba(74,52,40,.16);
  --line-dash:rgba(74,52,40,.22);
  --gold-line:rgba(217,164,65,.32);
  --font-head:'Noto Serif SC','Songti SC','STSong',serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-num:'JetBrains Mono','SF Mono','Roboto Mono',monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  padding-top:var(--strip-h);
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--cream);
  background-image:
    linear-gradient(to right, rgba(74,52,40,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(74,52,40,.07) 1px, transparent 1px);
  background-size:72px 72px;
  background-attachment:fixed;
}

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.01em;
  margin:0 0 .5em;
}

p{margin:0 0 1em}
a{color:var(--blue)}
img{max-width:100%;display:block}

#main-content{display:block;scroll-margin-top:calc(var(--strip-h) + 14px)}

:focus-visible{outline:3px solid var(--gold);outline-offset:3px}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:120;
  padding:11px 18px;
  background:var(--ink);color:var(--cream);
  font-weight:700;font-size:.9rem;text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transform:translateY(-220%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- header shell ---------- */
.site-rail{position:relative;z-index:80;display:block}

/* ---------- top coordinate strip ---------- */
.site-strip{
  position:fixed;top:0;left:0;right:0;height:var(--strip-h);z-index:55;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 18px;
  background:rgba(247,241,229,.96);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(6px);
}
.strip__progress{
  position:absolute;left:0;bottom:-1px;width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--red),var(--gold),var(--jade));
  will-change:transform;
}
.strip__left{display:flex;align-items:center;gap:18px;flex:1 1 auto;min-width:0;overflow:hidden}
.strip__right{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.strip__section{display:flex;align-items:baseline;gap:8px;margin:0;min-width:0;font-size:.82rem}
.strip__key{
  font-family:var(--font-num);font-size:.64rem;letter-spacing:.22em;
  color:var(--red);text-transform:uppercase;white-space:nowrap;
}
.strip__value{
  font-weight:700;color:var(--ink);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* ---------- brand ---------- */
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.brand__seal{
  width:44px;height:44px;flex:0 0 auto;
  display:grid;place-items:center;
  font-family:var(--font-head);font-size:1.4rem;font-weight:800;color:var(--cream);
  background:linear-gradient(150deg,var(--red),var(--orange));
  box-shadow:inset 0 0 0 1px rgba(247,241,229,.4);
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.brand__words{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand__name{font-family:var(--font-head);font-weight:800;font-size:1.12rem;letter-spacing:.02em}
.brand__tag{
  font-family:var(--font-num);font-size:.68rem;letter-spacing:.16em;
  color:var(--gold);text-transform:uppercase;
}
.brand--compact{display:none}
.brand--compact .brand__seal{width:34px;height:34px;font-size:1.05rem}
.brand--compact .brand__name{font-size:1rem}
.brand--footer{margin-bottom:14px}
.brand--footer .brand__name{color:var(--cream)}

/* ---------- chip buttons in strip ---------- */
.chip-btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;
  font-family:var(--font-body);font-size:.82rem;font-weight:600;
  color:var(--ink);background:transparent;
  border:1px solid rgba(74,52,40,.3);
  text-decoration:none;cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.chip-btn:hover{background:rgba(217,164,65,.2);border-color:var(--gold)}
.chip-btn[aria-pressed="true"]{background:var(--red);color:var(--cream);border-color:var(--red)}
.chip-btn--link{color:var(--blue);border-color:rgba(42,92,154,.35)}
.chip-btn--link:hover{background:rgba(42,92,154,.12);border-color:var(--blue);color:var(--blue)}
.chip-btn__dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 0 3px rgba(217,164,65,.22);
}
.chip-btn[aria-pressed="true"] .chip-btn__dot{background:var(--cream);box-shadow:0 0 0 3px rgba(247,241,229,.28)}

/* ---------- mobile nav toggle ---------- */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 13px;
  background:var(--ink);color:var(--cream);border:0;cursor:pointer;
  font-family:var(--font-body);font-size:.82rem;font-weight:700;letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:background-color .2s ease;
}
.nav-toggle[aria-expanded="true"]{background:var(--red)}
.nav-toggle__bars{position:relative;display:inline-block;width:16px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{content:"";position:absolute;left:0;right:0;height:2px;background:currentColor}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}

/* ---------- rail navigation ---------- */
.rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:70;
  display:flex;flex-direction:column;gap:20px;
  padding:26px 22px 24px;
  color:var(--cream);
  background-color:var(--night);
  background-image:
    radial-gradient(circle at 16% 6%, rgba(200,50,43,.38), transparent 62%),
    radial-gradient(circle at 82% 92%, rgba(217,164,65,.18), transparent 60%),
    repeating-linear-gradient(135deg, rgba(217,164,65,.06) 0 1px, transparent 1px 15px);
  border-right:1px solid var(--gold-line);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.rail__head{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding-bottom:18px;border-bottom:1px dashed var(--gold-line);
}
.rail__head .brand__name{color:var(--cream)}
.rail__close{
  display:none;
  width:36px;height:36px;place-items:center;
  background:transparent;color:var(--cream);border:1px solid var(--gold-line);
  font-size:1.15rem;line-height:1;cursor:pointer;
}
.rail__close:hover{background:var(--red);border-color:var(--red)}
.rail__nav{flex:1 1 auto;min-height:0;overflow-y:auto}
.rail__caption{
  margin:0 0 12px;
  font-family:var(--font-num);font-size:.64rem;letter-spacing:.24em;
  color:rgba(217,164,65,.9);text-transform:uppercase;
}
.rail__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px}
.rail__item{position:relative}
.rail__link{
  display:flex;align-items:baseline;gap:12px;
  padding:10px 12px 10px 14px;
  color:rgba(247,241,229,.78);text-decoration:none;
  font-size:.98rem;letter-spacing:.04em;
  border-left:2px solid transparent;
  clip-path:polygon(0 0,100% 0,100% 100%,11px 100%,0 calc(100% - 11px));
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.rail__link:hover{background:rgba(217,164,65,.14);color:var(--cream);border-left-color:var(--gold);transform:translateX(3px)}
.rail__link[aria-current="page"]{
  background:linear-gradient(100deg, rgba(200,50,43,.94), rgba(230,106,44,.5));
  color:#fff;font-weight:700;border-left-color:var(--gold);
}
.rail__no{
  font-family:var(--font-num);font-size:.72rem;letter-spacing:.1em;
  color:var(--gold);flex:0 0 auto;
}
.rail__link[aria-current="page"] .rail__no{color:var(--cream)}
.rail__label{white-space:nowrap}
.rail__foot{
  margin-top:auto;display:flex;flex-direction:column;gap:10px;
  padding-top:18px;border-top:1px dashed var(--gold-line);
}
.rail__cta{
  display:block;text-align:center;
  padding:11px 12px;
  font-size:.94rem;font-weight:700;letter-spacing:.06em;text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 13px),calc(100% - 13px) 100%,0 100%);
  transition:transform .18s ease,filter .18s ease,background-color .2s ease;
}
.rail__cta--red{background:var(--red);color:var(--cream)}
.rail__cta--gold{background:transparent;color:var(--gold);box-shadow:inset 0 0 0 1.5px var(--gold)}
.rail__cta:hover{transform:translateY(-2px);filter:brightness(1.08)}
.rail__note{
  margin:2px 0 0;
  font-family:var(--font-num);font-size:.7rem;letter-spacing:.06em;
  color:rgba(247,241,229,.55);
}

/* ---------- drawer backdrop ---------- */
.rail-backdrop{
  position:fixed;inset:0;z-index:65;
  background:rgba(15,13,11,.62);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .3s ease,visibility .3s ease;
}
.rail-backdrop[data-open]{opacity:1;visibility:visible;pointer-events:auto}

/* ---------- back to top ---------- */
.to-top{
  position:fixed;right:18px;bottom:22px;z-index:60;
  width:46px;height:46px;display:grid;place-items:center;
  background:var(--ink);color:var(--gold);
  border:1px solid var(--gold-line);cursor:pointer;
  font-family:var(--font-num);font-size:1.1rem;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 13px),calc(100% - 13px) 100%,0 100%);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background-color .2s ease;
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--red);color:var(--cream)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:72px;
  padding:58px 0 26px;
  color:rgba(247,241,229,.82);
  background-color:var(--night);
  background-image:
    radial-gradient(circle at 88% 4%, rgba(200,50,43,.32), transparent 58%),
    linear-gradient(to right, rgba(217,164,65,.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(217,164,65,.09) 1px, transparent 1px);
  background-size:auto, 64px 64px, 64px 64px;
  border-top:1px solid var(--gold-line);
}
.footer__grid{
  width:min(1200px,100%);margin:0 auto;padding:0 22px;
  display:grid;gap:34px;
  grid-template-columns:1.2fr .9fr .9fr 1.4fr;
}
.footer__brand{min-width:0}
.footer__region{
  margin:0 0 6px;
  font-family:var(--font-num);font-size:.76rem;letter-spacing:.14em;
  color:var(--gold);text-transform:uppercase;
}
.footer__note{margin:0;font-size:.82rem;color:rgba(247,241,229,.6)}
.footer__col{min-width:0}
.footer__title{
  margin:0 0 14px;
  font-family:var(--font-num);font-size:.68rem;font-weight:600;
  letter-spacing:.24em;color:var(--gold);text-transform:uppercase;
}
.footer__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.footer__link{
  color:rgba(247,241,229,.78);text-decoration:none;font-size:.92rem;
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer__link:hover{color:var(--gold);border-bottom-color:var(--gold)}
.footer__address{font-style:normal;display:flex;flex-direction:column;gap:8px}
.footer__line{
  margin:0;font-size:.9rem;color:rgba(247,241,229,.76);
  font-family:var(--font-num);letter-spacing:.02em;
  overflow-wrap:anywhere;
}
.footer__base{
  width:min(1200px,100%);margin:40px auto 0;padding:20px 22px 0;
  display:flex;flex-wrap:wrap;gap:12px 24px;
  align-items:center;justify-content:space-between;
  border-top:1px dashed var(--gold-line);
}
.footer__legal{
  margin:0;
  font-family:var(--font-num);font-size:.76rem;letter-spacing:.04em;
  color:rgba(247,241,229,.62);
}
.footer__mini{
  list-style:none;display:flex;flex-wrap:wrap;gap:8px 18px;margin:0;padding:0;font-size:.82rem;
}

/* ---------- layout canvas ---------- */
.canvas{width:min(1200px,100%);margin:0 auto;padding:0 22px}
.section{position:relative;padding:64px 0}
.section + .section{border-top:1px dashed var(--line-dash)}
.sec-head{
  display:grid;grid-template-columns:auto 1fr;gap:8px 18px;
  align-items:baseline;margin-bottom:28px;
}
.sec-no{
  font-family:var(--font-num);font-size:.74rem;letter-spacing:.2em;
  color:var(--red);white-space:nowrap;
}
.sec-title{margin:0;font-size:clamp(1.6rem,3vw,2.4rem)}
.sec-lead{
  margin:10px 0 0;color:var(--brown);
  font-size:1.0625rem;max-width:64ch;
}

.grid{display:grid;gap:22px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}

.cut-panel{
  position:relative;
  padding:26px;
  background:#fffaf0;
  box-shadow:0 22px 46px -32px rgba(31,26,23,.55);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 24px),calc(100% - 24px) 100%,0 100%);
}
.cut-panel--dark{background:var(--ink);color:var(--cream)}
.cut-panel--gold{background:linear-gradient(140deg,#fff6e2,#f0dfbe)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 22px;
  font-family:var(--font-body);font-size:.95rem;font-weight:700;letter-spacing:.04em;
  color:var(--ink);background:transparent;border:1px solid transparent;
  text-decoration:none;cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 15px),calc(100% - 15px) 100%,0 100%);
  transition:transform .18s ease,filter .18s ease,background-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--red{background:var(--red);color:var(--cream)}
.btn--gold{background:var(--gold);color:var(--ink)}
.btn--ghost{box-shadow:inset 0 0 0 1.5px rgba(31,26,23,.5)}
.btn--ghost:hover{color:var(--red);box-shadow:inset 0 0 0 1.5px var(--red)}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:0 8px;
  list-style:none;margin:0;padding:22px 0 0;
  font-family:var(--font-num);font-size:.74rem;letter-spacing:.08em;
  color:var(--brown);
}
.breadcrumbs li{display:inline-flex;align-items:center;gap:8px}
.breadcrumbs li::after{content:"/";color:var(--bronze)}
.breadcrumbs li:last-child::after{content:""}
.breadcrumbs a{color:var(--blue);text-decoration:none}
.breadcrumbs a:hover{text-decoration:underline}

/* ---------- filter bar ---------- */
.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  list-style:none;margin:0 0 24px;padding:0;
}
.filter-chip{
  padding:8px 14px;
  font-family:var(--font-num);font-size:.74rem;letter-spacing:.1em;
  color:var(--brown);background:transparent;
  border:1px solid rgba(74,52,40,.3);cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.filter-chip:hover{border-color:var(--gold);color:var(--ink)}
.filter-chip.is-active{background:var(--ink);color:var(--gold);border-color:var(--ink)}
.filter-count{
  font-family:var(--font-num);font-size:.74rem;color:var(--brown);
  margin-left:6px;letter-spacing:.08em;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- fold ---------- */
.fold{border-top:1px solid var(--line)}
.fold__summary{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 4px;cursor:pointer;
  font-family:var(--font-head);font-weight:800;font-size:1.05rem;
  list-style:none;
}
.fold__summary::-webkit-details-marker{display:none}
.fold__summary::after{
  content:"+";font-family:var(--font-num);color:var(--red);font-size:1.15rem;
}
.fold[open] .fold__summary::after{content:"−"}
.fold__body{padding:0 4px 20px;color:var(--brown)}

/* ---------- frame (image slot) ---------- */
.frame{
  position:relative;width:100%;overflow:hidden;
  background:linear-gradient(140deg,#efe3cf,#e0ceb0);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
}
.frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 28% 18%, rgba(200,50,43,.16), transparent 56%),
    radial-gradient(circle at 78% 84%, rgba(217,164,65,.24), transparent 58%);
}
.frame__media{
  display:block;width:100%;height:100%;
  aspect-ratio:16/9;object-fit:cover;
}
.frame--wide .frame__media{aspect-ratio:21/9}
.frame--portrait .frame__media{aspect-ratio:3/4}
.frame--square .frame__media{aspect-ratio:1/1}
.frame__cap{
  margin:10px 0 0;
  font-family:var(--font-num);font-size:.78rem;letter-spacing:.06em;
  color:var(--brown);
}

/* ---------- numeric + tags ---------- */
.num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  font-family:var(--font-num);font-size:.72rem;letter-spacing:.1em;
  color:var(--brown);
  background:rgba(217,164,65,.2);
  border:1px solid rgba(217,164,65,.5);
}
.tag--jade{color:var(--jade);background:rgba(47,125,92,.14);border-color:rgba(47,125,92,.45)}
.tag--red{color:var(--red);background:rgba(200,50,43,.12);border-color:rgba(200,50,43,.42)}

/* ---------- responsive ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w)}
  .site-strip{left:var(--rail-w)}
  .to-top{right:26px}
}

@media (max-width:1023px){
  .site-strip{padding:0 14px}
  .brand--compact{display:flex}
  .nav-toggle{display:inline-flex}
  .rail__close{display:grid}
  .rail{
    width:min(84vw,320px);
    transform:translateX(-104%);
    transition:transform .3s cubic-bezier(.4,0,.2,1);
    box-shadow:26px 0 60px -32px rgba(15,13,11,.85);
  }
  .rail[data-open]{transform:translateX(0)}
}

@media (max-width:900px){
  .grid--2,.grid--3,.grid--split{grid-template-columns:minmax(0,1fr)}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:52px 0}
}

@media (max-width:640px){
  body{background-size:48px 48px}
  .canvas{padding:0 16px}
  .footer__grid{padding:0 16px;gap:28px;grid-template-columns:minmax(0,1fr)}
  .footer__base{padding:20px 16px 0;flex-direction:column;align-items:flex-start}
  .strip__section{display:none}
  .sec-head{grid-template-columns:minmax(0,1fr);gap:6px}
  .sec-no{letter-spacing:.16em}
  .cut-panel{padding:20px}
  .to-top{right:14px;bottom:16px}
}

@media (max-width:400px){
  .brand--compact .brand__name{display:none}
  .chip-btn{padding:7px 10px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
  .btn:hover,.rail__cta:hover,.rail__link:hover{transform:none}
  .to-top{transform:none}
}