/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box}
html,body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
html{-webkit-text-size-adjust:100%}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}

/* ===== tokens ===== */
:root{
  --ink:#07141F;
  --ink-soft:#0A1B27;
  --teal:#0B2B33;
  --indigo:#17152E;
  --wine:#2A0F22;
  --cyan:#38E8D8;
  --amber:#FFB454;
  --magenta:#FF4F9A;
  --ice:#EAF4F7;
  --steel:#9CB2BF;
  --line:#2C4A55;
  --cut:18px;
  --header-h:72px;
  --wrap:1240px;
  --font-head:"Barlow Condensed","PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

/* ===== base ===== */
body{
  min-height:100vh;
  background:
    radial-gradient(1100px 480px at 84% -8%,rgba(23,21,46,.9),transparent 64%),
    radial-gradient(900px 440px at 4% -4%,rgba(11,43,51,.95),transparent 70%),
    var(--ink);
  color:var(--ice);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:800;letter-spacing:-.02em;line-height:1.06;color:var(--ice)}
h1{font-size:clamp(40px,7vw,96px);line-height:1.02}
h2{font-size:clamp(28px,4.4vw,56px)}
h3{font-size:clamp(20px,2.2vw,28px);letter-spacing:-.01em}
h4{font-size:clamp(17px,1.6vw,20px);letter-spacing:0}
p{color:#CFE0E7}
strong{color:var(--ice);font-weight:700}
small{font-size:13px}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
::selection{background:rgba(56,232,216,.28);color:var(--ice)}

/* ===== layout utils ===== */
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:clamp(18px,4vw,44px)}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:clamp(16px,2vw,28px)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em}

/* ===== section tag (exhibition label) ===== */
.section-tag{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--steel)}
.section-tag__num{color:var(--amber)}
.section-tag__label{color:var(--steel)}
.section-tag__line{display:inline-block;width:30px;height:2px;background:var(--cyan)}
.section-tag--amber .section-tag__line{background:var(--amber)}
.section-tag--magenta .section-tag__line{background:var(--magenta)}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:46px;padding:12px 22px;
  font-family:var(--font-head);font-size:15px;font-weight:700;letter-spacing:.04em;
  border:1px solid transparent;text-align:center;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .15s ease;
}
.btn--amber{background:var(--amber);color:#08131C;border-color:var(--amber)}
.btn--amber:hover{background:#FFC77E;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ice);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--block{width:100%}
.btn:active{transform:translateY(0)}

/* ===== panel / badge / status ===== */
.panel{
  position:relative;
  background:var(--teal);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,30px);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%);
}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 10px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.09em;
  border:1px solid var(--line);background:rgba(56,232,216,.08);color:var(--ice);
}
.badge--cyan{color:var(--cyan);border-color:rgba(56,232,216,.45)}
.badge--amber{color:var(--amber);border-color:rgba(255,180,84,.45);background:rgba(255,180,84,.1)}
.badge--magenta{color:var(--magenta);border-color:rgba(255,79,154,.45);background:rgba(255,79,154,.1)}
.status{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;color:var(--ice)}
.status__dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 3px rgba(56,232,216,.16)}
.status--amber .status__dot{background:var(--amber);box-shadow:0 0 0 3px rgba(255,180,84,.16)}
.status--magenta .status__dot{background:var(--magenta);box-shadow:0 0 0 3px rgba(255,79,154,.16)}

/* ===== breadcrumb ===== */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--steel)}
.breadcrumb__link{color:var(--steel);transition:color .16s ease}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:var(--line)}
.breadcrumb__current{color:var(--ice)}

/* ===== prose ===== */
.prose{max-width:66ch;font-size:17px;line-height:1.8;color:#CFE0E7}
.prose p+p{margin-top:1em}
.prose h2{margin-top:1.5em;margin-bottom:.45em}
.prose h3{margin-top:1.3em;margin-bottom:.4em}
.prose strong{color:var(--ice)}
.prose ul,.prose ol{margin-top:1em;display:grid;gap:.55em}
.prose li{position:relative;padding-left:22px}
.prose ul>li::before{content:"";position:absolute;left:0;top:.78em;width:10px;height:2px;background:var(--cyan)}
.prose ol{counter-reset:prose}
.prose ol>li::before{counter-increment:prose;content:counter(prose,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--font-mono);font-size:12px;color:var(--amber)}

/* ===== media frame (reusable responsive image container) ===== */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--line);
  background:
    linear-gradient(135deg,rgba(56,232,216,.12),rgba(7,20,31,0) 58%),
    repeating-linear-gradient(90deg,rgba(44,74,85,.34) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(44,74,85,.34) 0 1px,transparent 1px 44px),
    var(--teal);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 22px),calc(100% - 22px) 100%,0 100%);
}
.media-frame img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.media-frame__label{
  position:absolute;left:12px;bottom:12px;z-index:2;
  padding:4px 9px;border:1px solid var(--line);background:rgba(7,20,31,.78);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);
}

/* ===== reveal ===== */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .42s ease,transform .42s ease}
[data-reveal].is-visible{opacity:1;transform:none}

/* ===== skip link ===== */
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:10px 18px;
  font-family:var(--font-head);font-size:15px;font-weight:700;letter-spacing:.04em;
  background:var(--amber);color:#08131C;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:top .18s ease;
}
.skip-link:focus{top:12px}

/* ===== header ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.site-header[data-scrolled="true"]{
  background:rgba(7,20,31,.96);
  border-bottom-color:var(--line);
  box-shadow:0 14px 34px rgba(0,0,0,.42);
}
.site-header__progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--amber));
  transition:transform .12s linear;
}
.site-header__inner{
  position:relative;
  display:flex;align-items:center;gap:clamp(10px,2vw,24px);
  width:100%;max-width:var(--wrap);margin-inline:auto;
  min-height:var(--header-h);
  padding:12px clamp(18px,4vw,44px);
}

/* brand */
.brand{display:flex;align-items:center;gap:12px;order:1;flex:0 0 auto}
.brand__mark{
  position:relative;display:block;flex:0 0 auto;
  width:34px;height:34px;
  background:var(--amber);
  clip-path:polygon(0 0,100% 0,100% 62%,62% 100%,0 100%);
}
.brand__mark-line{
  position:absolute;left:9px;top:13px;
  width:16px;height:2px;background:var(--ink);
  box-shadow:0 7px 0 var(--ink);
}
.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{font-family:var(--font-head);font-size:20px;font-weight:800;letter-spacing:.02em;color:var(--ice)}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--steel);margin-top:3px}

/* toggle */
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  order:3;flex:0 0 auto;
  padding:9px 12px;
  border:1px solid var(--line);
  background:rgba(11,43,51,.92);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--amber)}
.nav-toggle__bars{position:relative;display:block;width:18px;height:12px;flex:0 0 auto}
.nav-toggle__bars span{position:absolute;left:0;width:100%;height:2px;background:var(--amber);transition:transform .2s ease,opacity .2s ease}
.nav-toggle__bars span:nth-child(1){top:0}
.nav-toggle__bars span:nth-child(2){top:5px}
.nav-toggle__bars span:nth-child(3){top:10px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--steel)}

/* nav (mobile drawer base) */
.site-nav{
  position:absolute;top:100%;left:0;right:0;
  order:4;
  display:flex;flex-direction:column;gap:16px;
  padding:18px clamp(18px,4vw,44px) 26px;
  background:linear-gradient(180deg,var(--teal),var(--ink) 88%);
  border-bottom:1px solid var(--line);
  box-shadow:0 26px 44px rgba(0,0,0,.5);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
  max-height:calc(100vh - var(--header-h));
  overflow-y:auto;
  visibility:hidden;opacity:0;transform:translateY(-10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s linear;
}
.site-nav[data-open="true"]{visibility:visible;opacity:1;transform:none}
.site-nav__list{display:flex;flex-direction:column;gap:4px;width:100%}
.site-nav__item{width:100%}
.site-nav__link{
  position:relative;display:block;
  padding:12px 14px;
  font-family:var(--font-head);font-size:17px;font-weight:700;letter-spacing:.02em;
  color:var(--steel);border:1px solid transparent;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%);
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.site-nav__link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:5px;height:2px;
  background:transparent;transition:background .18s ease;
}
.site-nav__link:hover{color:var(--ice);background:rgba(56,232,216,.08);border-color:rgba(56,232,216,.22)}
.site-nav__link[aria-current="page"]{color:var(--amber);background:rgba(255,180,84,.1);border-color:rgba(255,180,84,.28)}
.site-nav__link[aria-current="page"]::after{background:var(--amber)}
.site-nav__foot{display:flex;flex-direction:column;gap:12px;padding-top:16px;border-top:1px dashed var(--line)}
.site-nav__hint{font-size:13px;line-height:1.7;color:var(--steel)}

/* header tools */
.header-tools{order:2;margin-left:auto;display:flex;align-items:center;gap:10px;flex:0 0 auto}
.version-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 10px;
  border:1px solid rgba(255,180,84,.42);
  background:rgba(255,180,84,.1);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%);
}
.version-pill__label{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--steel)}
.version-pill__value{font-size:14px;font-weight:600;color:var(--amber);letter-spacing:.04em}
.header-tools__cta{display:none}

/* ===== footer ===== */
.site-footer{position:relative;background:var(--ink);border-top:1px solid var(--line);color:var(--steel);font-size:14px;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto 0;height:min(240px,30vw);pointer-events:none;
  background:
    linear-gradient(180deg,rgba(11,43,51,.9),rgba(7,20,31,0)),
    repeating-linear-gradient(135deg,rgba(44,74,85,.22) 0 2px,transparent 2px 18px);
}
.site-footer__grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr;gap:clamp(22px,3vw,44px);
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(34px,5vw,66px) clamp(18px,4vw,44px) clamp(22px,3vw,34px);
}
.footer__brand{display:flex;flex-direction:column}
.footer__brand-link{font-family:var(--font-head);font-size:22px;font-weight:800;letter-spacing:.02em;color:var(--ice);transition:color .16s ease}
.footer__brand-link:hover{color:var(--amber)}
.footer__brand-note{margin-top:12px;max-width:34ch;font-size:14px;line-height:1.72;color:var(--steel)}
.footer__stamp{margin-top:16px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:rgba(156,178,191,.66)}
.footer__col-title{font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--amber);margin-bottom:14px}
.footer__list{display:flex;flex-direction:column;gap:9px}
.footer__link{
  position:relative;display:inline-block;
  color:var(--steel);font-size:14px;
  transition:color .16s ease,transform .16s ease;
}
.footer__link::before{
  content:"";position:absolute;left:-14px;top:.62em;width:8px;height:1px;
  background:var(--cyan);opacity:0;transition:opacity .16s ease;
}
.footer__link:hover{color:var(--cyan);transform:translateX(2px)}
.footer__link:hover::before{opacity:1}
.footer__contact{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr;gap:clamp(14px,2vw,26px);
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(20px,3vw,30px) clamp(18px,4vw,44px) clamp(24px,3vw,34px);
  border-top:1px solid rgba(44,74,85,.7);
}
.footer__contact-item{display:flex;flex-direction:column;gap:4px}
.footer__contact-key{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:rgba(156,178,191,.75)}
.footer__contact-val{font-size:14px;color:var(--ice);word-break:break-word}
.footer__bottom{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:16px clamp(18px,4vw,44px) 28px;
  border-top:1px solid rgba(44,74,85,.7);
}
.footer__copyright,.footer__icp{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--steel)}
.footer__icp{color:rgba(156,178,191,.85)}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 20px;margin-left:auto}
.footer__legal .footer__link{font-size:13px}

/* ===== tablet ===== */
@media (min-width:600px){
  .site-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer__brand{grid-column:1 / -1}
  .footer__contact{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,1fr)}
}
@media (max-width:600px){
  .grid-12{grid-template-columns:1fr}
  .footer__legal{margin-left:0;width:100%}
}

/* ===== desktop header ===== */
@media (min-width:961px){
  .site-header__inner{flex-wrap:nowrap}
  .brand{order:1}
  .site-nav{
    order:2;
    position:static;
    flex:1 1 auto;flex-direction:row;align-items:center;justify-content:center;
    gap:0;padding:0;border:0;background:none;box-shadow:none;clip-path:none;
    max-height:none;overflow:visible;
    visibility:visible;opacity:1;transform:none;transition:none;
  }
  .site-nav__list{flex-direction:row;align-items:center;justify-content:center;gap:2px;width:auto;flex-wrap:wrap}
  .site-nav__item{width:auto}
  .site-nav__link{font-size:15px;padding:10px 13px}
  .site-nav__foot{display:none}
  .header-tools{order:3;margin-left:0}
  .header-tools__cta{display:inline-flex}
  .nav-toggle{display:none;order:4}
  .site-footer__grid{grid-template-columns:1.6fr 1fr 1fr 1fr;align-items:start}
  .footer__brand{grid-column:auto}
  .footer__contact{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@media (max-width:520px){
  .version-pill__label{display:none}
  .brand__sub{display:none}
  .nav-toggle__label{display:none}
}

/* ===== motion preferences ===== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  [data-reveal]{opacity:1;transform:none}
  .site-header__progress{transition:none}
}