/* ============ RESET & BASE ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  font-family:"Lora","Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif;
  font-size:16px;line-height:1.6;color:#2D2D2D;background:#F8F4EC;
  min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden;
}
main#main-content{flex:1 0 auto;width:100%}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .3s ease}
ul{list-style:none}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit}
address{font-style:normal}
h1,h2,h3,h4,h5,h6{
  font-family:"Oswald","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  font-weight:700;line-height:1.2;color:#0B1B3A;
}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 5vw}
::selection{background:#C9A84C;color:#0B1B3A}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#0B1B3A}
::-webkit-scrollbar-thumb{background:#C9A84C;border-radius:6px;border:2px solid #0B1B3A}
:focus-visible{
  outline:3px solid #FF6B35;
  outline-offset:3px;
  border-radius:2px;
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    transition-duration:0.01ms !important;
  }
}

/* ============ CSS VARIABLES ============ */
:root{
  --gold:#C9A84C;
  --gold-light:#E4C76F;
  --gold-dark:#A88937;
  --deep:#0B1B3A;
  --deep-2:#11264F;
  --deep-3:#08132B;
  --coral:#FF6B35;
  --ivory:#F8F4EC;
  --ivory-dark:#EDE6D8;
  --slate:#6B7A8F;
  --moss:#4B6E4E;
  --terra:#C67B4B;
  --charcoal:#2D2D2D;
  --border-w:3px;
  --shadow-hard:8px 8px 0 rgba(11,27,58,0.16);
  --font-display:"Oswald","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"Lora","Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif;
  --header-h:auto;
}

/* ============ SKIP LINK ============ */
.skip-link{
  position:fixed;top:-100px;left:16px;z-index:9999;
  padding:12px 24px;background:var(--coral);color:#fff;
  font-family:var(--font-display);font-weight:700;font-size:14px;
  letter-spacing:.05em;border-radius:0 0 6px 6px;
  transition:top .3s ease;
}
.skip-link:focus-visible{top:0}
.skip-link:focus{outline:4px solid #fff}
.skip-link:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);top:auto;left:-9999px}

/* ============ SCROLL PROGRESS ============ */
.scroll-progress{
  position:fixed;top:0;left:0;height:4px;width:100%;
  background:linear-gradient(90deg,var(--gold),var(--gold-light),var(--coral));
  transform-origin:0 50%;
  transform:scaleX(0);
  z-index:1200;
  opacity:.9;
  pointer-events:none;
}
@media (prefers-reduced-motion: reduce){
  .scroll-progress{display:none}
}

/* ============ HEADER ============ */
.site-header{
  background:var(--deep);
  color:#fff;
  position:relative;
  z-index:1000;
  border-bottom:2px solid var(--gold);
  box-shadow:0 4px 24px rgba(0,0,0,.4);
}
.header-top{
  max-width:1600px;
  margin:0 auto;
  padding:20px 5vw 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  position:relative;
}
.brand-lockup{
  display:flex;
  flex-direction:column;
  line-height:1;
  padding-bottom:2px;
  border-bottom:2px solid transparent;
  transition:border-color .3s ease;
}
.brand-lockup:hover{border-color:var(--gold)}
.brand-name{
  font-family:var(--font-display);
  font-size:clamp(26px, 3.5vw, 42px);
  font-weight:800;
  letter-spacing:.1em;
  background:linear-gradient(135deg,#F5DF9E 0%,var(--gold) 55%,#FFF3C4 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.brand-subtitle{
  font-family:var(--font-display);
  font-size:clamp(9px, 1vw, 12px);
  letter-spacing:.32em;
  color:var(--slate);
  margin-top:5px;
  text-transform:uppercase;
}
.header-cta{
  margin-left:auto;
  margin-right:16px;
}
.header-bottom{
  max-width:1600px;
  margin:0 auto;
  padding:0 5vw;
  border-top:1px solid rgba(201,168,76,.18);
}
.header-nav{
  width:100%;
}
.nav-list{
  display:flex;
  align-items:stretch;
  gap:0;
  flex-wrap:wrap;
}
.nav-list li{
  position:relative;
}
.nav-link{
  display:flex;
  align-items:center;
  gap:10px;
  padding:14px 22px 12px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:15px;
  letter-spacing:.06em;
  color:rgba(248,244,236,.9);
  text-transform:uppercase;
  position:relative;
  transition:color .35s ease,background .35s ease;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:22px;right:22px;bottom:0;
  height:3px;
  background:linear-gradient(90deg,var(--gold),var(--coral));
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .4s cubic-bezier(.65,.05,.36,1);
}
.nav-link:hover::after,
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
}
.nav-link[aria-current="page"]{
  color:var(--gold-light);
}
.nav-link:hover{
  background:rgba(201,168,76,.1);
  color:var(--gold-light);
}
.nav-index{
  font-size:11px;
  color:var(--gold);
  font-weight:700;
  opacity:.7;
  letter-spacing:.1em;
}
.nav-link:hover .nav-index,
.nav-link[aria-current="page"] .nav-index{
  opacity:1;
  color:var(--coral);
}
.nav-text{
  font-size:15px;
  font-family:var(--font-body);
  font-weight:600;
  letter-spacing:.04em;
}
.nav-toggle{
  display:none;
  width:46px;
  height:46px;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:6px;
  border:2px solid var(--gold);
  border-radius:8px;
  background:rgba(201,168,76,.12);
  padding:8px;
  transition:background .3s ease,border-color .3s ease;
  z-index:1500;
}
.nav-toggle:hover{
  background:rgba(201,168,76,.25);
  border-color:var(--gold-light);
}
.nav-toggle-line{
  display:block;width:22px;height:2px;
  background:var(--gold-light);
  border-radius:2px;
  transition:transform .4s cubic-bezier(.65,.05,.36,1),opacity .3s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1){
  transform:translateY(8px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2){
  opacity:0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3){
  transform:translateY(-8px) rotate(-45deg);
}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 28px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  letter-spacing:.08em;
  border-radius:4px;
  text-transform:uppercase;
  line-height:1;
  position:relative;
  overflow:hidden;
  border:3px solid transparent;
  transition:color .35s ease,background .35s ease,border-color .35s ease,box-shadow .35s ease,transform .2s ease;
  box-shadow:4px 4px 0 rgba(0,0,0,.25);
  cursor:pointer;
  white-space:nowrap;
}
.btn::before{
  content:"";
  position:absolute;top:0;left:-100%;width:100%;height:100%;
  background:linear-gradient(120deg,transparent,rgba(255,255,255,.35),transparent);
  transition:left .7s ease;
}
.btn:hover::before{left:100%}
.btn:active{transform:translateY(2px)}
.btn-gold{
  background:linear-gradient(135deg,var(--gold-dark),var(--gold) 60%,var(--gold-light));
  color:var(--deep);
  border-color:var(--gold-light);
}
.btn-gold:hover{
  color:#fff;
  border-color:var(--coral);
  box-shadow:6px 6px 0 rgba(255,107,53,.35);
}
.btn-ghost{
  background:transparent;
  color:var(--gold-light);
  border-color:var(--gold);
}
.btn-ghost:hover{
  background:var(--gold);
  color:var(--deep);
  border-color:var(--gold);
  box-shadow:6px 6px 0 rgba(201,168,76,.3);
}

/* ============ FOOTER ============ */
.site-footer{
  background:
    radial-gradient(ellipse 50% 60% at 15% 100%,rgba(201,168,76,.18) 0%,transparent 70%),
    radial-gradient(ellipse 45% 50% at 85% 0%,rgba(255,107,53,.08) 0%,transparent 70%),
    linear-gradient(180deg,var(--deep) 0%,var(--deep-3) 100%);
  color:rgba(248,244,236,.88);
  border-top:4px solid var(--gold);
  margin-top:auto;
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}
.footer-lead{
  max-width:1600px;
  margin:0 auto;
  padding:64px 5vw 40px;
  border-bottom:1px solid rgba(201,168,76,.2);
  display:flex;
  flex-direction:column;
  gap:18px;
}
.footer-lead-tag{
  color:var(--gold);
}
.footer-lead-text{
  font-family:var(--font-display);
  font-size:clamp(30px,5vw,68px);
  font-weight:800;
  line-height:1.15;
  letter-spacing:.02em;
  color:#fff;
}
.footer-lead-text br{display:none}
.footer-grid{
  max-width:1600px;
  margin:0 auto;
  padding:56px 5vw 48px;
  display:grid;
  grid-template-columns:1.2fr .6fr 1fr .9fr;
  gap:48px;
}
.footer-brand-col{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.footer-mark{
  font-family:var(--font-display);
  font-size:clamp(38px,5vw,66px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:.06em;
  background:linear-gradient(135deg,#F5DF9E,var(--gold) 60%,#B8904D);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.footer-description{
  font-size:15px;
  color:rgba(248,244,236,.65);
  max-width:300px;
}
.footer-title{
  font-family:var(--font-display);
  font-size:16px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gold-light);
  text-transform:uppercase;
  padding-bottom:12px;
  margin-bottom:22px;
  border-bottom:2px solid rgba(201,168,76,.35);
  position:relative;
}
.footer-title::after{
  content:"";
  position:absolute;
  bottom:-2px;left:0;
  width:42px;height:2px;
  background:var(--coral);
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-list a{
  font-size:15px;
  color:rgba(248,244,236,.82);
  padding:4px 0;
  display:inline-block;
  position:relative;
  transition:color .25s ease,padding-left .25s ease;
}
.footer-list a::before{
  content:"→ ";
  color:var(--gold);
  opacity:0;
  transition:opacity .25s ease;
}
.footer-list a:hover::before{opacity:1}
.footer-list a:hover{
  color:var(--gold-light);
  padding-left:8px;
}
.footer-address{
  font-size:15px;
  line-height:2;
  color:rgba(248,244,236,.82);
}
.footer-address a:hover{
  color:var(--gold-light);
  text-decoration:underline;
  text-underline-offset:4px;
}
.footer-cta-col{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.footer-note{
  font-size:14px;
  color:var(--gold-light);
  background:rgba(201,168,76,.1);
  border-left:3px solid var(--gold);
  padding:14px 16px;
  border-radius:0 6px 6px 0;
  line-height:1.7;
}
.footer-bar{
  max-width:1600px;
  margin:0 auto;
  padding:22px 5vw 26px;
  border-top:1px solid rgba(201,168,76,.14);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:rgba(248,244,236,.5);
  letter-spacing:.04em;
}
.footer-bar-brand{
  color:var(--gold-light);
  font-weight:600;
}
.footer-icp{
  color:rgba(248,244,236,.65);
}
.footer-bar a:hover{color:var(--gold-light)}

/* ============ COMMON EXHIBIT TAG ============ */
.exhibit-tag{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-display);
  font-weight:700;
  font-size:13px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-dark);
  background:var(--ivory);
  border:2px solid var(--gold);
  padding:6px 14px;
  border-radius:3px;
  box-shadow:3px 3px 0 rgba(201,168,76,.35);
}
.exhibit-tag::before{
  content:"◆";
  font-size:10px;
  color:var(--coral);
}

/* ============ PAGE BANNER (for subpages) ============ */
.page-banner{
  background:
    linear-gradient(135deg,rgba(11,27,58,.97) 0%,rgba(11,27,58,.88) 100%),
    radial-gradient(ellipse 60% 80% at 80% 20%,rgba(201,168,76,.22) 0%,transparent 70%);
  padding:80px 0 90px;
  border-bottom:4px solid var(--gold);
  position:relative;
  overflow:hidden;
}
.page-banner::after{
  content:"QY";
  position:absolute;
  right:-30px;
  bottom:-60px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:280px;
  color:rgba(201,168,76,.06);
  line-height:1;
  pointer-events:none;
  letter-spacing:-.02em;
}
.page-banner .banner-inner{
  max-width:1280px;
  margin:0 auto;
  padding:0 5vw;
  position:relative;
  z-index:2;
}
.page-banner h1{
  color:#fff;
  font-size:clamp(36px,5.5vw,72px);
  letter-spacing:.03em;
  line-height:1.05;
  margin-bottom:16px;
  max-width:12em;
}
.page-banner .banner-sub{
  color:var(--gold-light);
  font-family:var(--font-body);
  font-size:clamp(15px,1.6vw,19px);
  max-width:42em;
  margin-bottom:26px;
  opacity:.9;
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:400;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--slate);
  margin-bottom:14px;
}
.breadcrumb a{color:var(--gold-light)}
.breadcrumb a:hover{color:var(--coral)}
.breadcrumb .sep{
  color:var(--coral);
  margin:0 2px;
  font-weight:700;
}

/* ============ BODY CONTENT BASE ============ */
.content-section{
  padding:80px 5vw;
  max-width:1280px;
  margin:0 auto;
}
.content-section h2{
  font-size:clamp(26px,3vw,42px);
  position:relative;
  padding-left:20px;
  margin-bottom:12px;
}
.content-section h2::before{
  content:"";
  position:absolute;
  left:0;top:8px;bottom:8px;
  width:6px;
  background:linear-gradient(180deg,var(--gold) 30%,var(--coral));
  border-radius:3px;
}
.content-section h3{
  font-size:20px;
  color:var(--gold-dark);
  margin:24px 0 12px;
  font-weight:700;
}
.content-section p{
  color:var(--charcoal);
  margin-bottom:16px;
}
.section-index{
  font-family:var(--font-display);
  font-size:clamp(60px,8vw,120px);
  font-weight:900;
  line-height:1;
  color:transparent;
  -webkit-text-stroke:2px var(--gold);
  opacity:.7;
  margin-bottom:8px;
}
.section-title-row{
  display:flex;
  align-items:flex-end;
  gap:20px;
  flex-wrap:wrap;
  margin-bottom:32px;
  border-bottom:3px solid var(--deep);
  padding-bottom:16px;
}
.section-title-row .section-index{
  font-size:54px;
  -webkit-text-stroke:2px var(--deep);
  opacity:1;
}
.section-title-row h2{
  font-size:clamp(24px,3vw,40px);
  padding:0;
  margin:0 0 4px;
  border:none;
}
.section-title-row h2::before{content:none}
.section-title-row .section-sub{
  margin-left:auto;
  color:var(--slate);
  font-size:14px;
  letter-spacing:.08em;
}

/* ============ IMAGE CONTAINER BASE RULES ============ */
.image-frame{
  position:relative;
  background:var(--deep);
  border:3px solid var(--gold-dark);
  box-shadow:var(--shadow-hard);
  overflow:hidden;
  aspect-ratio:16/10;
}
.image-frame img{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
  transition:transform .6s ease,filter .6s ease;
}
.image-frame:hover img{
  transform:scale(1.03);
  filter:brightness(1.05);
}
.image-frame .frame-caption{
  position:absolute;
  left:0;bottom:0;
  width:100%;
  padding:10px 14px;
  background:linear-gradient(transparent,rgba(11,27,58,.85));
  color:var(--gold-light);
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  font-family:var(--font-body);
}
.image-frame::after{
  content:"";
  position:absolute;
  top:0;left:0;right:0;bottom:0;
  border:1px solid rgba(255,255,255,.2);
  pointer-events:none;
}

/* ============ CARD GRID ============ */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.card{
  background:var(--ivory);
  border:3px solid var(--deep);
  border-radius:4px;
  padding:26px;
  box-shadow:var(--shadow-hard);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  position:relative;
  overflow:hidden;
}
.card::before{
  content:attr(data-number);
  position:absolute;
  top:6px;right:12px;
  font-family:var(--font-display);
  font-size:48px;
  font-weight:900;
  color:var(--gold);
  opacity:.22;
  line-height:1;
}
.card:hover{
  transform:translateY(-4px);
  box-shadow:12px 12px 0 rgba(255,107,53,.25);
  border-color:var(--gold-dark);
}
.card-title{
  font-family:var(--font-display);
  font-size:20px;
  margin-bottom:10px;
  letter-spacing:.04em;
}
.card-text{
  font-size:15px;
  color:var(--charcoal);
  opacity:.88;
  margin-bottom:18px;
}
.card-link{
  display:inline-flex;
  align-items:center;
  gap:4px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:14px;
  color:var(--gold-dark);
  letter-spacing:.08em;
  text-transform:uppercase;
  transition:color .25s ease,gap .25s ease;
}
.card-link:hover{
  color:var(--coral);
  gap:10px;
}

/* ============ REVEAL MOTION ============ */
[data-reveal]{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.22,.61,.36,1);
  will-change:opacity,transform;
}
[data-reveal][data-reveal-delay="1"]{transition-delay:.12s}
[data-reveal][data-reveal-delay="2"]{transition-delay:.24s}
[data-reveal][data-reveal-delay="3"]{transition-delay:.38s}
[data-reveal][data-reveal-delay="4"]{transition-delay:.5s}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
}
@media (prefers-reduced-motion: reduce){
  [data-reveal]{
    opacity:1;
    transform:none;
    transition:none;
  }
}

/* ============ RESPONSIVE ============ */
@media (min-width:1200px){
  .nav-list li{
    flex:0 1 auto;
  }
}
@media (max-width:900px){
  .nav-toggle{
    display:flex;
  }
  .header-top{
    flex-wrap:wrap;
    padding:14px 5vw 12px;
  }
  .header-cta{
    order:3;
    width:100%;
    margin:10px 0 0;
    display:flex;
    justify-content:center;
  }
  .header-bottom{
    position:fixed;
    top:0;
    right:-100%;
    width:min(420px,86vw);
    height:100vh;
    background:linear-gradient(160deg,var(--deep) 0%,var(--deep-2) 100%);
    z-index:1200;
    padding:100px 0 36px;
    border-left:3px solid var(--gold);
    border-top:none;
    transition:right .45s cubic-bezier(.65,.05,.36,1);
    overflow-y:auto;
    box-shadow:-16px 0 40px rgba(0,0,0,.6);
  }
  .header-bottom[data-open="true"],
  .header-bottom[data-open=""]{
    right:0;
  }
  .nav-list{
    flex-direction:column;
    gap:2px;
    padding:0 0;
  }
  .nav-link{
    padding:16px 32px 14px;
    border-bottom:1px solid rgba(201,168,76,.12);
    gap:12px;
    justify-content:flex-start;
  }
  .nav-link::after{
    left:32px;right:55%;
  }
  .nav-index{
    font-size:12px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:40px;
  }
  .footer-brand-col{
    grid-column:1 / -1;
  }
  .footer-cta-col{
    grid-column:1 / -1;
  }
  .card-grid{
    grid-template-columns:repeat(2,1fr);
  }
}
@media (max-width:600px){
  body{
    font-size:15px;
  }
  .nav-toggle{
    width:42px;height:42px;
  }
  .header-bottom{
    width:86vw;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:36px;
    padding:40px 5vw 36px;
  }
  .footer-lead{
    padding:48px 5vw 32px;
  }
  .card-grid{
    grid-template-columns:1fr;
  }
  .content-section{
    padding:48px 5vw;
  }
  .footer-bar{
    flex-direction:column;
    text-align:center;
    gap:6px;
  }
  .footer-lead-text br{display:inline}
  .btn{
    padding:12px 20px;
    font-size:14px;
  }
  .header-cta{
    margin-top:8px;
  }
}

/* ============ UTILITIES ============ */
.text-center{text-align:center}
.mt-1{margin-top:16px}
.mt-2{margin-top:32px}
.mt-3{margin-top:48px}
.mb-1{margin-bottom:16px}
.mb-2{margin-bottom:32px}
.mb-3{margin-bottom:48px}
.text-gold{color:var(--gold-dark)}
.text-coral{color:var(--coral)}
.bg-ivory{background:var(--ivory)}
.bg-deep{background:var(--deep)}
.bg-gold-light{background:linear-gradient(180deg,#F8F4EC,#EDE6D8)}