/* ==========================================================================
   云开全站 · 共享样式 /assets/site.css
   深空蓝底 · 信号红/警戒黄/青翠绿状态 · 粗边框硬阴影
   ========================================================================== */

/* ---------- 01. RESET ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol,table{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}

/* ---------- 02. TOKENS ---------- */
:root{
  --ink:#0B1B33;
  --ink-deep:#071223;
  --ink-veil:#050D1A;
  --panel:#2A3342;
  --panel-2:#16233A;
  --paper:#F4F0E6;
  --paper-shade:#E6E0D1;
  --red:#E03A3A;
  --yellow:#F2C230;
  --green:#2FA36B;
  --moss:#6E7C4A;
  --clay:#B4623C;
  --cyan:#4FC3D9;
  --steel:#8A93A0;

  --line:2px;
  --line-bold:3px;
  --shadow-hard:6px 6px 0 rgba(4,10,20,.55);
  --shadow-hard-sm:4px 4px 0 rgba(4,10,20,.5);
  --shadow-lift:8px 8px 0 rgba(4,10,20,.5);

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --wrap:1180px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- 03. BASE TYPOGRAPHY ---------- */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  overflow-wrap:anywhere;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.01em;
}
h1{font-size:clamp(30px,5vw,52px);}
h2{font-size:clamp(24px,3.4vw,36px);}
h3{font-size:clamp(19px,2.2vw,26px);}
h4{font-size:clamp(17px,1.6vw,20px);}
p{line-height:1.75;}
strong{font-weight:700;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em;}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:0;}

/* ---------- 04. ACCESSIBILITY ---------- */
:focus{outline:none;}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:1px;}
.skip-link{
  position:fixed;
  top:-80px;left:16px;
  z-index:300;
  padding:11px 20px;
  background:var(--yellow);
  color:var(--ink);
  border:var(--line) solid var(--ink-deep);
  font-weight:700;
  font-size:14px;
  letter-spacing:.06em;
  box-shadow:var(--shadow-hard-sm);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px;}

/* ---------- 05. LAYOUT PRIMITIVES ---------- */
.wrap{
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
}
.section{padding-block:clamp(40px,6vw,84px);}
.sheet{
  background:var(--paper);
  color:var(--ink);
  border-top:var(--line-bold) solid var(--moss);
}
.prose{max-width:38em;}
.prose p{margin-bottom:1.1em;}
.grid{display:grid;gap:clamp(14px,2vw,24px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}

/* ---------- 06. BUTTONS ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  border:var(--line) solid var(--paper);
  background:transparent;
  color:var(--paper);
  font-family:var(--font-body);
  font-weight:700;
  font-size:14px;
  letter-spacing:.05em;
  box-shadow:var(--shadow-hard-sm);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s,color .16s,border-color .16s;
}
.btn:hover{transform:translate(-2px,-2px);box-shadow:var(--shadow-lift);}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 rgba(4,10,20,.5);}
.btn--primary{background:var(--red);border-color:var(--red);color:#fff;}
.btn--primary:hover{background:#F04A4A;border-color:#F04A4A;}
.btn--signal{background:var(--yellow);border-color:var(--yellow);color:var(--ink);}
.btn--signal:hover{background:#FFD24A;border-color:#FFD24A;}
.btn--ghost{border-color:rgba(244,240,230,.55);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}

/* ---------- 07. BREADCRUMB ---------- */
.breadcrumb{
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
  padding-top:18px;
}
.breadcrumb-list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--steel);
}
.breadcrumb-list li{display:flex;align-items:center;gap:8px;}
.breadcrumb-list li + li::before{content:"/";color:var(--moss);}
.breadcrumb-list a{color:var(--steel);border-bottom:1px solid transparent;}
.breadcrumb-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.breadcrumb-list [aria-current="page"]{color:var(--paper);}

/* ---------- 08. IMAGE / MEDIA FRAMES ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border:var(--line-bold) solid var(--ink-deep);
  box-shadow:var(--shadow-hard);
  background:
    linear-gradient(135deg,rgba(79,195,217,.18),transparent 58%),
    repeating-linear-gradient(90deg,rgba(244,240,230,.07) 0 1px,transparent 1px 34px),
    repeating-linear-gradient(0deg,rgba(244,240,230,.05) 0 1px,transparent 1px 34px),
    linear-gradient(180deg,var(--panel-2),var(--ink-deep));
}
.media-frame > img,
.media-frame > svg{width:100%;height:100%;object-fit:cover;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame--paper{
  background:
    linear-gradient(135deg,rgba(180,98,60,.14),transparent 60%),
    linear-gradient(180deg,var(--paper),var(--paper-shade));
  border-color:var(--panel);
  box-shadow:var(--shadow-hard-sm);
}
.media-caption{
  display:block;
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--steel);
}

/* ---------- 09. CARDS · TAGS · EXHIBIT LABELS ---------- */
.card{
  position:relative;
  padding:clamp(16px,2vw,24px);
  background:var(--paper);
  color:var(--ink);
  border:var(--line) solid var(--ink-deep);
  box-shadow:var(--shadow-hard-sm);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translate(-4px,-4px);box-shadow:var(--shadow-lift);}
.card--dark{
  background:var(--panel-2);
  color:var(--paper);
  border-color:var(--moss);
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:var(--line) solid currentColor;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  line-height:1.6;
}
.tag--red{color:var(--red);background:rgba(224,58,58,.10);}
.tag--yellow{color:#8A6308;background:rgba(242,194,48,.24);}
.tag--green{color:var(--green);background:rgba(47,163,107,.12);}
.tag--clay{color:var(--clay);background:rgba(180,98,60,.10);}
.tag--cyan{color:#1C7D8F;background:rgba(79,195,217,.16);}

.exhibit-label{
  display:block;
  padding:10px 14px;
  background:var(--paper);
  color:var(--ink);
  border:var(--line) solid var(--ink-deep);
  border-left:6px solid var(--clay);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  line-height:1.7;
}

/* ---------- 10. FILTER ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:20px;
}
.filter-btn{
  padding:8px 14px;
  border:var(--line) solid var(--ink-deep);
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  transition:background-color .16s,color .16s,transform .16s var(--ease);
}
.filter-btn:hover{transform:translate(-2px,-2px);}
.filter-btn[aria-pressed="true"]{background:var(--ink);color:var(--yellow);border-color:var(--ink);}
[data-filter-item].is-hidden{display:none !important;}

/* ---------- 11. HEADER ---------- */
.site-header{
  position:relative;
  z-index:40;
  background:
    radial-gradient(1100px 320px at 50% -150px,rgba(79,195,217,.20),transparent 72%),
    linear-gradient(180deg,var(--ink) 0%,var(--ink-deep) 100%);
  color:var(--paper);
}
.scroll-progress{
  position:fixed;
  inset:0 0 auto 0;
  height:3px;
  background:rgba(244,240,230,.08);
  z-index:90;
  pointer-events:none;
}
.scroll-progress span{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--red) 0%,var(--yellow) 52%,var(--cyan) 100%);
}
.masthead{
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
  padding-block:clamp(22px,3.6vw,40px) clamp(14px,2vw,22px);
  text-align:center;
}
.masthead-kicker{
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  color:var(--cyan);
}
.masthead-brand{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(38px,7.2vw,72px);
  line-height:.98;
  letter-spacing:.06em;
  color:var(--paper);
  text-shadow:4px 4px 0 rgba(224,58,58,.88);
  transition:text-shadow .2s var(--ease),transform .2s var(--ease);
}
.masthead-brand:hover{
  transform:translate(-2px,-2px);
  text-shadow:7px 7px 0 rgba(224,58,58,.7);
}
.masthead-tagline{
  margin-top:12px;
  font-size:13px;
  letter-spacing:.24em;
  color:var(--steel);
}
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 18px;
  border:var(--line) solid rgba(244,240,230,.45);
  color:var(--paper);
  font-weight:700;
  font-size:14px;
  letter-spacing:.08em;
  transition:border-color .18s,color .18s,background-color .18s;
}
.nav-toggle-bars{display:grid;gap:4px;width:20px;}
.nav-toggle-bars span{display:block;height:2px;background:var(--paper);transition:background-color .18s;}
.nav-toggle[aria-expanded="true"]{border-color:var(--yellow);color:var(--yellow);background:rgba(242,194,48,.08);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span{background:var(--yellow);}
.site-nav{
  display:block;
  border-top:1px solid rgba(244,240,230,.16);
  background:rgba(7,18,35,.42);
}
.nav-list{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  align-items:stretch;
  gap:0 clamp(4px,1.1vw,16px);
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
}
.nav-item{display:flex;}
.nav-link{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:15px 8px;
  border-bottom:var(--line-bold) solid transparent;
  font-size:16px;
  font-weight:700;
  letter-spacing:.05em;
  color:var(--paper);
  transition:color .18s,border-color .18s,background-color .18s;
}
.nav-link:hover{color:var(--cyan);border-bottom-color:var(--cyan);background:rgba(79,195,217,.07);}
.nav-link[aria-current="page"]{color:var(--yellow);border-bottom-color:var(--red);background:rgba(242,194,48,.08);}
.nav-index{
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:400;
  letter-spacing:.1em;
  color:var(--steel);
}
.nav-link[aria-current="page"] .nav-index{color:var(--red);}
.quickbar{
  background:var(--panel-2);
  border-top:1px solid rgba(244,240,230,.10);
  border-bottom:var(--line-bold) solid var(--moss);
}
.quickbar-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 14px;
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
  padding-block:10px;
  font-size:13px;
}
.quickbar-label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--steel);
}
.quick-list{display:flex;flex-wrap:wrap;gap:8px;}
.quick-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 12px;
  border:var(--line) solid rgba(244,240,230,.26);
  background:rgba(244,240,230,.04);
  color:var(--paper);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s,color .16s;
}
.quick-link::before{
  content:"";
  width:8px;
  height:8px;
  flex:0 0 auto;
  background:var(--steel);
}
.quick-link--red::before{background:var(--red);}
.quick-link--yellow::before{background:var(--yellow);}
.quick-link--green::before{background:var(--green);}
.quick-link:hover{
  transform:translate(-2px,-2px);
  box-shadow:3px 3px 0 rgba(4,10,20,.6);
  border-color:var(--cyan);
  color:var(--cyan);
}
.sync-status{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.05em;
  color:var(--steel);
}
.sync-dot{
  width:9px;
  height:9px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--green);
  box-shadow:0 0 0 4px rgba(47,163,107,.18);
  animation:sync-breathe 2s ease-in-out infinite;
}
.sync-state{color:var(--green);font-weight:700;}
.sync-time{color:var(--paper);}
@keyframes sync-breathe{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.5;transform:scale(.78);}
}

/* ---------- 12. FOOTER ---------- */
.site-footer{
  background:linear-gradient(180deg,var(--ink-deep) 0%,var(--ink-veil) 100%);
  border-top:4px solid var(--moss);
  color:var(--paper);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.85fr) minmax(0,.85fr) minmax(0,1.15fr);
  gap:clamp(22px,3vw,46px);
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
  padding-block:clamp(36px,5vw,64px) clamp(28px,4vw,48px);
}
.footer-col{min-width:0;}
.footer-brand{
  display:inline-block;
  font-family:var(--font-display);
  font-weight:900;
  font-size:26px;
  letter-spacing:.08em;
  color:var(--paper);
  text-shadow:3px 3px 0 rgba(224,58,58,.75);
}
.footer-lead{
  margin:14px 0 18px;
  max-width:34ch;
  font-size:14px;
  line-height:1.8;
  color:var(--steel);
}
.footer-title{
  margin-bottom:14px;
  padding-bottom:8px;
  border-bottom:var(--line) solid rgba(244,240,230,.18);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.16em;
  color:var(--yellow);
}
.footer-list{display:grid;gap:9px;}
.footer-list a{
  font-size:14px;
  color:var(--paper);
  border-bottom:1px solid transparent;
  transition:color .16s,border-color .16s;
}
.footer-list a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.footer-contact{display:grid;gap:12px;}
.footer-contact-item{display:grid;gap:2px;}
.footer-contact dt{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--steel);
}
.footer-contact dd{
  font-size:14px;
  line-height:1.7;
  color:var(--paper);
}
.footer-contact-note{
  margin-top:14px;
  font-size:12px;
  line-height:1.75;
  color:var(--steel);
}
.footer-bottom{
  border-top:1px solid rgba(244,240,230,.14);
  background:rgba(0,0,0,.28);
}
.footer-bottom-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  gap:8px 22px;
  width:min(100% - (2 * var(--gutter)), var(--wrap));
  margin-inline:auto;
  padding-block:18px 24px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--steel);
  text-align:center;
}
.footer-icp{color:var(--paper);}
.footer-copy{color:var(--steel);}

/* ---------- 13. REVEAL ---------- */
@media (prefers-reduced-motion:no-preference){
  .js [data-reveal]{opacity:0;transform:translateY(18px);}
  .js [data-reveal].is-revealed{
    opacity:1;
    transform:none;
    transition:opacity .5s ease,transform .5s var(--ease);
  }
}

/* ---------- 14. RESPONSIVE ---------- */
@media (max-width:1040px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-col--brand{grid-column:1 / -1;}
  .footer-lead{max-width:52ch;}
}

@media (max-width:899px){
  .nav-toggle{display:inline-flex;margin:6px 0 18px;}
  .site-nav{display:none;}
  .site-nav[data-open]{
    display:block;
    border-top:var(--line-bold) solid var(--yellow);
    background:rgba(7,18,35,.72);
  }
  .nav-list{flex-direction:column;gap:0;padding-block:8px;}
  .nav-item{display:block;}
  .nav-link{
    display:flex;
    width:100%;
    padding:14px 4px;
    border-bottom:1px solid rgba(244,240,230,.14);
    border-left:4px solid transparent;
  }
  .nav-link:hover{border-bottom-color:rgba(244,240,230,.14);border-left-color:var(--cyan);}
  .nav-link[aria-current="page"]{border-bottom-color:rgba(244,240,230,.14);border-left-color:var(--red);}
  .quickbar-inner{padding-block:12px;}
  .sync-status{width:100%;margin-left:0;padding-top:4px;}
}

@media (max-width:760px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr);}
  .grid--12 > *{grid-column:1 / -1 !important;}
}

@media (max-width:640px){
  body{font-size:15.5px;}
  .masthead-brand{text-shadow:3px 3px 0 rgba(224,58,58,.85);}
  .masthead-tagline{letter-spacing:.16em;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom-inner{gap:6px;padding-block:16px 22px;}
  .quick-link{padding:6px 11px;}
}

/* ---------- 15. MOTION PREFERENCES ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .quick-link:hover,.btn:hover,.card:hover,.masthead-brand:hover{transform:none;}
}