*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:132px;}
body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
img,svg,video{display:block;max-width:100%;}
table{border-collapse:collapse;width:100%;}

:root{
  --crimson:#7A1F2B;
  --crimson-deep:#4A1019;
  --gold:#C8A24A;
  --gold-light:#E8CD8A;
  --ink-blue:#0F1B2B;
  --ink-blue-2:#1C3049;
  --celadon:#63B7A3;
  --paper:#F5EFE4;
  --paper-2:#EDE4D5;
  --ink:#17181B;
  --mist:#6B665C;
  --patina:#8C6A3F;
  --font-head:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",ui-monospace,"Courier New",monospace;
  --line-gold:rgba(200,162,74,.35);
  --line-paper:rgba(245,239,228,.16);
  --ease:cubic-bezier(.22,.61,.36,1);
  --edge:min(1240px,calc(100% - 3rem));
}

body{
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.16;letter-spacing:-.01em;}
h1{font-size:clamp(2.4rem,6vw,5rem);}
h2{font-size:clamp(1.6rem,3.4vw,2.6rem);}
h3{font-size:clamp(1.15rem,2vw,1.5rem);}
p{max-width:68ch;}
strong{font-weight:600;}
::selection{background:var(--crimson);color:var(--paper);}

:focus-visible{outline:2px solid var(--gold-light);outline-offset:3px;}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--gold);outline-offset:3px;}

.skip-link{
  position:absolute;
  left:1rem;
  top:-100px;
  z-index:200;
  padding:.7rem 1.2rem;
  background:var(--paper);
  color:var(--crimson-deep);
  font-size:.85rem;
  letter-spacing:.1em;
  border:1px solid var(--gold);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:.5rem;}

.container{width:var(--edge);margin-inline:auto;}
.grid{display:grid;gap:clamp(1.25rem,3vw,2.5rem);}
.cluster{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem 1.25rem;}
.stack{display:flex;flex-direction:column;gap:1rem;}

.section-head{display:grid;gap:.7rem;max-width:64ch;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.65rem;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--patina);
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--gold);}
.section-title{font-family:var(--font-head);color:var(--ink);}
.lede{font-size:clamp(1rem,1.4vw,1.1rem);color:var(--mist);line-height:1.8;}
.rule{border:0;height:1px;background:linear-gradient(90deg,var(--gold),rgba(200,162,74,0));}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.72rem 1.35rem;
  font-size:.84rem;
  font-weight:500;
  letter-spacing:.1em;
  line-height:1.2;
  border:1px solid transparent;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn--primary{background:var(--crimson);color:var(--paper);border-color:rgba(200,162,74,.6);}
.btn--primary:hover{background:#8E2431;border-color:var(--gold-light);transform:translateY(-1px);}
.btn--ghost{background:transparent;color:var(--crimson-deep);border-color:var(--line-gold);}
.btn--ghost:hover{background:rgba(200,162,74,.14);border-color:var(--gold);}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:12px;letter-spacing:.1em;color:var(--mist);}
.breadcrumb__item{display:inline-flex;align-items:center;gap:.5rem;}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--gold);}
.breadcrumb__link{border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);}
.breadcrumb__link:hover{color:var(--crimson);border-bottom-color:var(--gold);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.18rem .6rem;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  border:1px solid var(--line-gold);
  color:var(--patina);
}
.tag--gold{background:rgba(200,162,74,.14);}
.tag--celadon{color:#1F6A5A;background:rgba(99,183,163,.16);border-color:rgba(99,183,163,.55);}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  background:var(--ink-blue-2);
  border:1px solid var(--line-gold);
}
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img{display:block;width:100%;height:100%;}
.media-frame > img,
.media-frame > picture > img{object-fit:cover;filter:saturate(.72) contrast(1.06);}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(118deg,rgba(15,27,43,0) 40%,rgba(232,205,138,.18) 50%,rgba(15,27,43,0) 60%);
}
.media-frame--wide{aspect-ratio:16/7;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  margin:0;
  padding:.7rem 1rem;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--paper);
  background:linear-gradient(0deg,rgba(15,27,43,.92),rgba(15,27,43,0));
}

.tabs__list{display:flex;flex-wrap:wrap;gap:.2rem;border-bottom:1px solid var(--line-gold);}
.tabs__tab{
  margin-bottom:-1px;
  padding:.7rem 1.1rem;
  font-size:.85rem;
  letter-spacing:.08em;
  color:var(--mist);
  border:1px solid transparent;
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),background-color .2s var(--ease),border-color .2s var(--ease);
}
.tabs__tab:hover{color:var(--crimson);background:rgba(200,162,74,.08);}
.tabs__tab[aria-selected="true"],
.tabs__tab.is-active{color:var(--crimson-deep);background:rgba(200,162,74,.14);border-bottom-color:var(--crimson);}
.tabs__panel{padding-top:1.5rem;animation:panel-in .28s var(--ease) both;}
.tabs__panel[hidden]{display:none;}
@keyframes panel-in{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:translateY(0);}}

/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:90;}
.status-strip{
  background:#0A1420;
  color:rgba(245,239,228,.76);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  border-bottom:1px solid rgba(200,162,74,.2);
}
.status-strip__inner{
  width:var(--edge);
  margin-inline:auto;
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:.4rem 1.5rem;
  min-height:30px;
  padding-block:4px;
}
.status-strip__mark{color:var(--gold-light);letter-spacing:.2em;}
.status-strip__ver{margin-left:.55em;color:var(--celadon);letter-spacing:.14em;}
.status-strip__sync{color:rgba(245,239,228,.6);}
.status-strip__clock{margin-left:.6em;color:var(--paper);letter-spacing:.18em;}
.status-strip__state{margin-left:auto;display:inline-flex;align-items:center;gap:.45rem;color:var(--celadon);}
.status-dot{
  width:6px;height:6px;
  background:var(--celadon);
  border-radius:50%;
  box-shadow:0 0 0 3px rgba(99,183,163,.18);
}

.masthead{position:relative;background:var(--ink-blue);border-bottom:1px solid rgba(200,162,74,.42);}
.masthead__inner{
  width:var(--edge);
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:clamp(.9rem,2.5vw,2.25rem);
  min-height:78px;
  padding-block:.7rem;
}

.brand{display:flex;align-items:center;gap:.75rem;flex:0 0 auto;color:var(--paper);}
.brand__glyph{
  display:grid;
  place-items:center;
  width:44px;height:44px;
  font-family:var(--font-head);
  font-size:1.3rem;
  color:var(--gold-light);
  border:1px solid var(--gold);
  background:linear-gradient(160deg,rgba(122,31,43,.95),rgba(74,16,25,.95));
}
.brand__text{display:flex;flex-direction:column;line-height:1.3;}
.brand__name{font-family:var(--font-head);font-size:1.02rem;font-weight:600;letter-spacing:.14em;}
.brand__line{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.2em;color:rgba(232,205,138,.7);}

.gate-nav{flex:1 1 auto;display:flex;justify-content:flex-end;}
.gate-nav__list{display:flex;align-items:center;gap:clamp(.35rem,1.4vw,1.35rem);}
.gate-nav__item{display:block;}
.gate-nav__link{
  display:flex;
  align-items:baseline;
  gap:.4rem;
  padding:.55rem .2rem;
  font-size:.82rem;
  letter-spacing:.08em;
  color:rgba(245,239,228,.8);
  border-bottom:2px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.gate-nav__num{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.12em;color:rgba(200,162,74,.72);}
.gate-nav__label{white-space:nowrap;}
.gate-nav__link:hover{color:var(--gold-light);border-bottom-color:rgba(200,162,74,.55);}
.gate-nav__link[aria-current="page"]{color:var(--gold-light);border-bottom-color:var(--gold);}
.gate-nav__link[aria-current="page"] .gate-nav__num{color:var(--celadon);}

.masthead__side{display:flex;align-items:center;gap:.65rem;flex:0 0 auto;}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.6rem .8rem;
  color:var(--paper);
  border:1px solid var(--line-gold);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold-light);color:var(--gold-light);}
.nav-toggle__bars{
  width:18px;height:2px;
  background:currentColor;
  box-shadow:0 -6px 0 currentColor,0 6px 0 currentColor;
}
.nav-toggle__label{line-height:1;}

.scroll-progress{
  position:absolute;
  inset:auto auto 0 0;
  width:0;
  height:2px;
  z-index:3;
  pointer-events:none;
  background:linear-gradient(90deg,var(--crimson),var(--gold) 48%,var(--celadon));
}

/* ===== footer ===== */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,7vw,5.5rem);
  background:var(--crimson-deep);
  color:rgba(245,239,228,.8);
  border-top:1px solid rgba(200,162,74,.45);
}
.site-footer__gate{
  height:12px;
  background:repeating-linear-gradient(90deg,rgba(200,162,74,.55) 0 1px,transparent 1px 18px);
  opacity:.55;
}
.site-footer__inner{
  width:var(--edge);
  margin-inline:auto;
  padding:clamp(1.8rem,4.5vw,3.2rem) 0 1.6rem;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.95fr);
  gap:clamp(1.5rem,4vw,3rem);
}
.footer-brand{display:grid;gap:.9rem;align-content:start;}
.footer-brand__glyph{
  display:grid;
  place-items:center;
  width:46px;height:46px;
  font-family:var(--font-head);
  font-size:1.35rem;
  color:var(--gold-light);
  border:1px solid rgba(200,162,74,.7);
  background:rgba(15,27,43,.35);
}
.footer-brand__summary{max-width:34ch;font-size:.92rem;line-height:1.8;color:rgba(245,239,228,.82);}
.footer-brand__meta{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:rgba(232,205,138,.72);}

.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.5rem 1.25rem;}
.footer-col{display:grid;gap:.85rem;align-content:start;}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-light);
  padding-bottom:.6rem;
  border-bottom:1px solid rgba(200,162,74,.28);
}
.footer-col__list{display:grid;gap:.55rem;}
.footer-col__link{
  display:inline-block;
  font-size:.9rem;
  color:rgba(245,239,228,.82);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-col__link:hover{color:var(--gold-light);border-bottom-color:rgba(200,162,74,.6);}

.footer-contact{
  grid-column:1/-1;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:.5rem 2rem;
  padding-top:1.4rem;
  border-top:1px solid rgba(200,162,74,.22);
}
.footer-contact__line{max-width:none;font-size:.88rem;color:rgba(245,239,228,.78);word-break:break-word;}
.footer-contact__line--wide{grid-column:1/-1;}
.footer-contact__key{
  display:inline-block;
  min-width:5.4em;
  margin-right:.6em;
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.18em;
  color:rgba(232,205,138,.85);
}

.footer-legal{
  grid-column:1/-1;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:.5rem 1.5rem;
  padding-top:1.1rem;
  border-top:1px solid rgba(200,162,74,.22);
}
.footer-legal__line{max-width:none;font-size:12px;letter-spacing:.06em;color:rgba(245,239,228,.58);}

@media (max-width:1080px){
  .gate-nav__num{display:none;}
  .gate-nav__link{font-size:.78rem;letter-spacing:.04em;}
}

@media (max-width:900px){
  :root{--edge:min(1240px,calc(100% - 2.5rem));}
  html{scroll-padding-top:120px;}
  .status-strip__state{margin-left:0;}
  .masthead__inner{min-height:64px;gap:.75rem;}
  .brand__glyph{width:38px;height:38px;font-size:1.1rem;}
  .brand__name{font-size:.94rem;letter-spacing:.1em;}
  .brand__line{display:none;}
  .gate-nav{
    position:absolute;
    top:100%;left:0;right:0;
    display:none;
    justify-content:flex-start;
    padding:.5rem 1.25rem 1.25rem;
    max-height:min(72vh,520px);
    overflow-y:auto;
    background:#0B1626;
    border-bottom:1px solid var(--gold);
    box-shadow:0 18px 32px rgba(6,12,20,.55);
    z-index:5;
  }
  .gate-nav[data-open]{display:block;}
  .gate-nav__list{flex-direction:column;align-items:stretch;gap:0;}
  .gate-nav__link{
    padding:.9rem .2rem;
    font-size:.96rem;
    border-bottom:1px solid rgba(200,162,74,.16);
  }
  .gate-nav__num{display:inline-block;}
  .nav-toggle{display:inline-flex;}
  .masthead__side{margin-left:auto;}
  .site-footer__inner{grid-template-columns:minmax(0,1fr);gap:1.8rem;}
  .footer-contact{grid-template-columns:minmax(0,1fr);}
}

@media (max-width:640px){
  body{font-size:16px;}
  .status-strip{font-size:10px;letter-spacing:.1em;}
  .status-strip__inner{gap:.3rem 1rem;min-height:28px;}
  .status-strip__sync{display:none;}
  .status-strip__clock{letter-spacing:.12em;}
  .masthead__side .btn--primary{padding:.6rem .8rem;font-size:.76rem;letter-spacing:.06em;}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.4rem 1rem;}
  .footer-legal{flex-direction:column;}
  .tabs__tab{padding:.6rem .8rem;font-size:.8rem;}
  .media-frame--wide{aspect-ratio:4/3;}
}

@media (max-width:420px){
  .brand__name{font-size:.86rem;}
  .footer-cols{grid-template-columns:minmax(0,1fr);}
}

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