*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --navy:#0A1E3F;
  --navy-2:#1B3A6B;
  --navy-deep:#050D1E;
  --orange:#FF6B00;
  --gold:#FFD700;
  --cream:#F5F1E8;
  --off-white:#E8ECF1;
  --slate:#7A8CA6;
  --green:#00C48C;
  --red:#E53935;
  --font-display:Impact,Haettenschweiler,"Arial Narrow Bold","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:Inter,"PingFang SC","Microsoft YaHei",sans-serif;
  --w-nav:260px;
  --topbar-h:64px;
  --container-w:1200px;
  --radius:4px;
  --ease:cubic-bezier(.22,1,.36,1);
}

html{scroll-behavior:smooth}

body{
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.7;
  color:var(--off-white);
  background-color:var(--navy);
  background-image:radial-gradient(circle at 78% 12%,rgba(255,107,0,.09),transparent 38%),radial-gradient(circle at 18% 88%,rgba(255,215,0,.05),transparent 32%);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}

img{display:block;max-width:100%}
ul,ol{list-style:none}
a{color:var(--gold);text-decoration:none;transition:color .2s}
a:hover{text-decoration:underline}
p{max-width:68ch}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.08;letter-spacing:.01em;color:var(--off-white)}

:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:3px}
::selection{background:var(--orange);color:var(--navy)}

.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;
}
.text-gold{color:var(--gold)}
.text-orange{color:var(--orange)}
.text-slate{color:var(--slate)}
.text-green{color:var(--green)}
.text-red{color:var(--red)}

.container{width:min(var(--container-w),calc(100% - 2rem));margin-inline:auto}
.container--narrow{max-width:820px}
.section{padding:2.5rem 0}

.skip-link{
  position:fixed;
  top:-4rem;
  left:1rem;
  z-index:2000;
  background:var(--gold);
  color:var(--navy);
  font-weight:700;
  padding:.65rem 1.1rem;
  border-radius:var(--radius);
  text-decoration:none;
  box-shadow:0 4px 14px rgba(0,0,0,.35);
  transition:top .25s var(--ease);
}
.skip-link:hover{text-decoration:none}
.skip-link:focus{top:1rem}

.site-header{position:relative;z-index:50}
.header-topbar{
  position:sticky;
  top:0;
  z-index:50;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  height:var(--topbar-h);
  padding-inline:1rem;
  background:rgba(10,30,63,.92);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,215,0,.16);
}

.brand-mark{
  display:inline-flex;
  align-items:center;
  gap:.65rem;
  text-decoration:none;
}
.brand-mark:hover{text-decoration:none}
.brand-mark__symbol{
  width:36px;height:36px;
  display:flex;align-items:center;justify-content:center;
  background:var(--orange);
  color:var(--navy);
  font-family:var(--font-display);
  font-size:1.25rem;
  font-weight:700;
  border-radius:4px;
  clip-path:polygon(0 0,100% 0,100% 64%,58% 100%,0 100%);
}
.brand-mark__text{
  font-family:var(--font-display);
  font-size:1.25rem;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--off-white);
  line-height:1;
}
.brand-mark:hover .brand-mark__text{color:var(--gold)}

.header-context{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  color:var(--slate);
  font-size:.8rem;
  letter-spacing:.18em;
  text-transform:uppercase;
}
.header-context__dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px rgba(0,196,140,.8)}
.header-context__label{font-weight:600;color:var(--off-white);letter-spacing:.14em}

.nav-toggle{
  position:fixed;
  top:calc((var(--topbar-h) - 42px)/2);
  right:.75rem;
  z-index:150;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;height:42px;
  padding:10px;
  background:rgba(10,30,63,.85);
  border:1px solid rgba(255,215,0,.35);
  border-radius:var(--radius);
  cursor:pointer;
  transition:border-color .2s,background .2s;
}
.nav-toggle:hover{background:var(--navy-2)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child{transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child{transform:translateY(-7px) rotate(-45deg)}
.nav-toggle__bar{
  display:block;
  width:100%;
  height:2px;
  background:var(--gold);
  transition:transform .3s var(--ease),opacity .2s;
}

.site-nav{
  position:fixed;
  top:0;
  right:0;
  z-index:120;
  height:100vh;
  width:var(--w-nav);
  background:linear-gradient(160deg,var(--navy) 0%,#081832 100%);
  border-left:1px solid rgba(255,215,0,.14);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:1.25rem;
}
.site-nav__list{display:grid;gap:.4rem;width:100%}
.site-nav__item{margin:0}
.site-nav__link{
  display:flex;
  align-items:center;
  gap:.8rem;
  padding:.72rem .9rem;
  border-left:3px solid transparent;
  border-radius:0 var(--radius) var(--radius) 0;
  color:var(--off-white);
  font-family:var(--font-display);
  font-size:1.12rem;
  font-weight:700;
  line-height:1.1;
  letter-spacing:.03em;
  text-decoration:none;
  transition:background .2s,color .2s,border-color .2s,transform .2s;
}
.site-nav__link:hover{
  background:var(--navy-2);
  color:var(--gold);
  border-left-color:var(--orange);
  transform:translateX(3px);
}
.site-nav__link[aria-current="page"]{
  color:var(--gold);
  border-left-color:var(--gold);
  background:linear-gradient(90deg,rgba(255,107,0,.2),rgba(255,107,0,0));
}
.site-nav__index{
  font-family:var(--font-body);
  font-size:.74rem;
  font-weight:600;
  color:var(--slate);
  min-width:1.7rem;
  letter-spacing:.08em;
}
.site-nav__label{white-space:nowrap}
.site-nav__foot{
  position:absolute;
  bottom:1.1rem;
  left:1.2rem;
  right:1.2rem;
  display:flex;
  justify-content:space-between;
  color:var(--slate);
  font-size:.68rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:.7rem;
}

.nav-backdrop{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(3,7,15,.58);
  opacity:0;
  visibility:hidden;
  transition:opacity .3s,visibility .3s;
}
.nav-backdrop.is-visible{opacity:1;visibility:visible}

@media(max-width:1023px){
  .header-topbar{padding-right:4.5rem}
  .nav-toggle{display:flex}
  .site-nav{
    width:min(320px,86vw);
    padding:calc(var(--topbar-h) + 2rem) 1.5rem 2rem;
    transform:translateX(105%);
    visibility:hidden;
    transition:transform .35s var(--ease),visibility .35s;
    border-left-color:rgba(255,215,0,.28);
    box-shadow:-14px 0 40px rgba(0,0,0,.4);
  }
  .site-nav[data-open]{transform:translateX(0);visibility:visible}
  .site-nav__foot{display:none}
  body.nav-is-open{overflow:hidden}
}

@media(min-width:1024px){
  body{padding-right:var(--w-nav)}
  body.nav-is-open{overflow:auto}
  .nav-toggle{display:none}
  .nav-backdrop{display:none}
}

.btn{
  display:inline-flex;
  align-items:center;
  gap:.55rem;
  padding:.78rem 1.4rem;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-display);
  font-size:1rem;
  font-weight:700;
  letter-spacing:.04em;
  text-transform:uppercase;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s,border-color .2s,color .2s,transform .2s,box-shadow .2s;
}
.btn:hover{text-decoration:none}
.btn--primary{background:var(--orange);color:var(--navy)}
.btn--primary:hover{
  background:var(--gold);
  border-color:var(--gold);
  color:var(--navy);
  transform:translateY(-2px);
  box-shadow:0 10px 24px rgba(255,107,0,.28);
}
.btn--ghost{background:transparent;border-color:var(--orange);color:var(--orange)}
.btn--ghost:hover{
  background:rgba(255,107,0,.14);
  border-color:var(--gold);
  color:var(--gold);
  transform:translateY(-2px);
}

.grid{display:grid;gap:1.5rem;grid-template-columns:1fr}
@media(min-width:768px){.grid--2{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.grid--3{grid-template-columns:repeat(3,1fr)}}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.4rem .85rem;
  font-size:.85rem;
  color:var(--slate);
  padding:1.1rem 0;
}
.breadcrumb a{color:var(--gold);transition:color .2s}
.breadcrumb a:hover{color:var(--orange);text-decoration:none}
.breadcrumb__sep{opacity:.6}
.breadcrumb__current{color:var(--off-white)}

.page-header{padding:3rem 0 1.5rem}
.page-title{font-size:clamp(3rem,6vw,5.2rem);text-transform:uppercase;letter-spacing:.02em}
.page-subtitle{font-size:1.25rem;color:var(--gold);letter-spacing:.08em;margin-top:.35rem;text-transform:uppercase}
.lead{font-size:1.12rem;line-height:1.8;color:var(--off-white);max-width:62ch}

.card{
  background:var(--navy-2);
  border:1px solid rgba(255,255,255,.07);
  border-radius:10px;
  padding:1.4rem;
  display:flex;
  flex-direction:column;
  gap:.6rem;
  box-shadow:0 4px 0 rgba(0,0,0,.18);
  transition:transform .22s var(--ease),border-color .22s,box-shadow .22s;
}
.card:hover{
  transform:translateY(-5px);
  border-color:rgba(255,107,0,.55);
  box-shadow:0 14px 30px rgba(0,0,0,.35);
}
.card__title{font-size:1.4rem;color:var(--off-white)}
.card__meta{font-size:.85rem;color:var(--slate)}
.card__text{font-size:.95rem;color:var(--off-white);line-height:1.7}

.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.28rem .7rem;
  border-radius:999px;
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.02em;
  background:rgba(255,107,0,.14);
  border:1px solid rgba(255,107,0,.32);
  color:var(--gold);
  white-space:nowrap;
}
.chip--green{background:rgba(0,196,140,.14);border-color:rgba(0,196,140,.35);color:var(--green)}
.chip--red{background:rgba(229,57,53,.14);border-color:rgba(229,57,53,.35);color:#ff8a80}

.exhibit{padding:2.2rem 0;border-top:1px solid rgba(255,215,0,.12)}
.exhibit-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  gap:.6rem 1.5rem;
  margin-bottom:1.6rem;
  padding-bottom:.95rem;
  border-bottom:1px solid rgba(255,215,0,.16);
}
.exhibit-head__index{
  font-family:var(--font-display);
  font-size:2.4rem;
  font-weight:700;
  line-height:1;
  color:var(--orange);
  min-width:2.4em;
}
.exhibit-head__title{font-size:clamp(1.8rem,3vw,2.5rem);flex:1;color:var(--off-white)}
.exhibit-head__note{font-size:.9rem;color:var(--slate);max-width:36ch}

.index-rule{
  display:flex;
  align-items:center;
  gap:.75rem;
  color:var(--slate);
  font-size:.8rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  margin:2rem 0;
}
.index-rule::before{content:"";flex:0 0 46px;height:4px;background:var(--orange)}
.index-rule::after{content:"";flex:1;height:1px;background:repeating-linear-gradient(90deg,rgba(255,215,0,.4) 0 6px,transparent 6px 12px)}

.media-frame{
  position:relative;
  aspect-ratio:16/10;
  border-radius:10px;
  overflow:hidden;
  border:1px solid rgba(255,215,0,.2);
  background:
    linear-gradient(135deg,rgba(27,58,107,.72),rgba(9,25,54,.86)),
    radial-gradient(circle at 70% 30%,rgba(255,107,0,.25),transparent 55%);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:border-color .25s;
}
.media-frame:hover{border-color:rgba(255,107,0,.6)}
.media-frame img{width:100%;height:100%;object-fit:cover;object-position:center}
.media-frame__caption{font-size:.8rem;color:var(--slate);text-align:center;margin-top:.55rem;letter-spacing:.04em}
.media-frame--square{aspect-ratio:1}
.media-frame--portrait{aspect-ratio:3/4;max-width:340px}
.media-frame--wide{aspect-ratio:21/9}

.stat{
  font-family:var(--font-display);
  font-size:clamp(1.8rem,4vw,3rem);
  font-weight:700;
  line-height:1;
  color:var(--gold);
}
.stat--orange{color:var(--orange)}
.stat--slate{color:var(--slate)}

.site-footer{
  position:relative;
  margin-top:4rem;
  background:var(--navy-deep);
  color:var(--off-white);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg,var(--orange) 0 22%,var(--gold) 22% 36%,transparent 36%);
  opacity:.85;
}
.footer-grid{
  width:min(var(--container-w),calc(100% - 2rem));
  margin-inline:auto;
  display:grid;
  gap:2.2rem;
  padding:3rem 0 2.2rem;
}
.footer-brand{display:flex;flex-direction:column;gap:.4rem}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:1.9rem;
  color:var(--gold);
  letter-spacing:.04em;
}
.footer-brand__desc{color:var(--slate);font-size:.95rem;max-width:44ch}
.footer-heading{
  font-size:1.15rem;
  color:var(--gold);
  letter-spacing:.16em;
  text-transform:uppercase;
  margin-bottom:.95rem;
  padding-left:.8rem;
  position:relative;
}
.footer-heading::before{
  content:"";
  position:absolute;
  left:0;
  top:.12em;
  width:5px;
  height:1.05em;
  background:var(--orange);
}
.footer-links ul,.footer-contact ul{display:grid;gap:.55rem}
.footer-links a{color:var(--off-white);font-size:.95rem;transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--gold);text-decoration:none;padding-left:4px}
.footer-contact{display:flex;flex-direction:column}
.footer-contact li{color:var(--slate);font-size:.9rem}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.07);
  padding:1.3rem 1rem 2rem;
  text-align:center;
}
.footer-bottom p{font-size:.84rem;color:var(--slate);margin-inline:auto}
p.footer-trust{color:var(--off-white);max-width:78ch;margin-top:.6rem}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1.4fr}}

.back-to-top{
  position:fixed;
  bottom:1.25rem;
  left:1.25rem;
  z-index:300;
  width:48px;
  height:48px;
  border-radius:50%;
  border:2px solid var(--gold);
  background:var(--orange);
  color:var(--navy);
  font-size:1.5rem;
  line-height:1;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.35);
  opacity:0;
  visibility:hidden;
  transform:translateY(14px);
  transition:opacity .25s,transform .25s,visibility .25s,background .2s;
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--gold)}
.back-to-top__icon{display:block;transform:translateY(-1px)}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
}