:root {
  --ink: #202c30; --panel: #263338; --panel-deep: #1e2a2e;
  --paper: #eee4ce; --muted: #bdc5bf; --gold: #d4b987; --rule: #485453;
  --panel-title: 21px; --panel-body: 13px; --panel-caption: 11px; --panel-leading: 1.8; --panel-radius: 3px; --selected: #384740;
  --serif: 'Songti SC', 'STSong', 'SimSun', Georgia, serif;
  --sans: 'Microsoft YaHei', 'PingFang SC', system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: var(--ink); color: var(--paper); font: 15px/1.8 var(--sans); }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-underline-offset: 5px; }
button { cursor: pointer; color: inherit; }
button:disabled { cursor: wait; opacity: 0.6; }
button:focus-visible, a:focus-visible, input:focus-visible, summary:focus-visible { outline: 2px solid var(--gold); outline-offset: 5px; }
button { border: 0; background: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; }
.site-header { min-height: 76px; padding: 18px max(4vw, 24px); display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--rule); gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font: 22px/1.4 var(--serif); letter-spacing: 3px; }
.brand small { display: block; font: 10px/1.7 var(--sans); color: var(--muted); letter-spacing: 3px; }
.site-header nav { display: flex; gap: 34px; font-size: 13px; }
.site-header nav a { text-decoration: none; color: var(--muted); }
.site-header nav a:hover, .site-header nav a[aria-current] { color: var(--gold); }
main { max-width: 1540px; margin: 0 auto; padding: 0 max(4vw, 24px); }
.intro { display: flex; align-items: flex-end; justify-content: space-between; padding: 15px 0 17px; gap: 24px; }
.eyebrow { color: var(--gold); font-size: 11px; letter-spacing: 3px; }
.intro h1 { font-size: 20px; letter-spacing: 3px; line-height: 1.5; }
.intro .eyebrow { display: none; }
.intro > p { max-width: 360px; font-size: 12px; color: var(--muted); line-height: 2; }
.exhibition { display: grid; grid-template-columns: 224px minmax(0, 1fr); gap: 20px; }
.panel { background: var(--panel); border: 1px solid var(--rule); border-radius: var(--panel-radius); }
.catalog { padding: 25px 18px 18px; min-width: 0; }
.catalog-heading { display: flex; justify-content: space-between; align-items: baseline; margin: 0 8px 17px; }
.catalog-heading h2 { font-size: var(--panel-title); letter-spacing: 3px; }
.catalog-heading span { color: var(--muted); font-size: 10px; }
.filters { display: flex; margin-bottom: 20px; border-bottom: 1px solid var(--rule); }
.filters button { flex: 1; padding: 6px 0 11px; font-size: 11px; color: var(--muted); border-bottom: 1px solid transparent; }
.filters button[aria-pressed=true] { color: var(--gold); border-bottom-color: var(--gold); }
.catalog-list { height: 410px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--rule) transparent; }
.catalog-item { width: 100%; display: flex; align-items: center; gap: 13px; text-align: left; padding: 10px; border: 1px solid transparent; margin-bottom: 6px; transition: background 160ms; }
.catalog-item:hover { background: #2b3e33; }
.catalog-item[aria-pressed=true] { border-color: #8f805e; background: var(--selected); }
.catalog-item img { width: 46px; height: 46px; flex-shrink: 0; }
.catalog-item strong { display: block; font: 17px/1.5 var(--serif); letter-spacing: 2px; }
.catalog-item small { display: block; font-size: 10px; color: var(--muted); }
.catalog-note { color: var(--muted); font: 13px/2 var(--serif); padding: 17px 10px 0; letter-spacing: 2px; }
.viewer::before { content: ""; position: absolute; inset: -12px; background: url("./素材/网页/封面/烟雨江南湖畔秘境.webp") center / cover; filter: blur(5px) brightness(0.20) saturate(0.55); pointer-events: none; }
.viewer { position: relative; min-width: 0; background: var(--panel-deep); overflow: hidden; }
.viewer-heading { position: absolute; top: 26px; left: 30px; right: 24px; z-index: 2; display: flex; justify-content: space-between; align-items: flex-start; pointer-events: none; }
.viewer-heading h2 { font-size: 27px; letter-spacing: 5px; line-height: 1.7; }
.viewer-heading #itemSubtitle { color: var(--muted); font-size: 12px; letter-spacing: 3px; }
.viewer-heading button { pointer-events: auto; }
.quiet-button { font-size: 11px; color: var(--muted); border: 1px solid var(--rule); padding: 6px 13px; }
.quiet-button:hover { color: var(--gold); border-color: var(--gold); }
#stage { height: clamp(520px, 72vh, 740px); position: relative; width: 100%; touch-action: pan-y; }
#stage canvas { display: block; width: 100%; height: 100%; touch-action: none; }
#loading { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 15px; background: var(--panel-deep); color: var(--muted); font-size: 13px; z-index: 1; }
#loading[hidden] { display: none; }
.loading-mark { font: 48px var(--serif); color: var(--gold); }
.view-controls { display: flex; justify-content: center; gap: 22px; margin: 0 24px; padding: 0 0 16px; border-bottom: 1px solid var(--rule); }
.view-controls button { padding: 3px 0; font-size: 12px; color: var(--muted); border-bottom: 1px solid transparent; }
.view-controls button[aria-pressed=true] { color: var(--gold); border-bottom-color: var(--gold); }
.view-controls button:hover { color: var(--paper); }
.opening-control { display: flex; align-items: center; justify-content: center; gap: 18px; margin: 14px auto 0; max-width: 480px; padding: 0 28px; font-size: 11px; color: var(--muted); }
.opening-control label { white-space: nowrap; }
.opening-control label span { margin-left: 8px; color: var(--gold); min-width: 40px; display: inline-block; }
.opening-control input { flex: 1; min-width: 50px; accent-color: var(--gold); cursor: pointer; height: 22px; }
.viewer-hint { text-align: center; margin: 5px 0 15px; color: var(--muted); font-size: 10px; letter-spacing: 1px; }
.interpretation { padding: 28px; margin: 24px 0 32px; background: var(--panel); border: 1px solid var(--rule); border-radius: var(--panel-radius); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--rule); padding-bottom: 21px; }
.section-heading h2, .sources h2 { font-size: var(--panel-title); letter-spacing: 4px; line-height: 1.8; }
.tabs { display: flex; gap: 30px; }
.tabs button { font-size: 15px; color: var(--muted); padding: 8px 5px; border-bottom: 1px solid transparent; letter-spacing: 2px; }
.tabs button[aria-selected=true] { color: var(--gold); border-color: var(--gold); }
.tab-panel { padding-top: 30px; }
[hidden] { display: none !important; }
.shape-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 45px; }
.shape-intro h3 { font-size: 26px; letter-spacing: 2px; margin-bottom: 10px; }
.shape-intro p { color: var(--muted); max-width: 560px; }
.shape-stats { display: flex; flex-wrap: wrap; gap: 26px; margin: 26px 0; }
.shape-stats div { padding-right: 25px; border-right: 1px solid var(--rule); }
.shape-stats div:last-child { border: 0; }
.shape-stats dt { color: var(--muted); font-size: 11px; }
.shape-stats dd { margin: 0; font: 25px/1.8 var(--serif); color: var(--gold); }
.shape-stats dd small { font: 12px var(--sans); margin-left: 4px; }
.section-note { color: var(--muted); font-size: 12px; line-height: 2; margin-bottom: 24px; }
.knowledge { border-bottom: 1px solid var(--rule); padding: 0 0 17px; margin-bottom: 20px; }
.knowledge h3 { font-size: 20px; letter-spacing: 2px; margin-bottom: 8px; }
.knowledge p { color: var(--muted); font-size: var(--panel-body); line-height: var(--panel-leading); }
.evidence { display: inline-block; font: 10px/1.5 var(--sans); color: var(--gold); border: 1px solid var(--rule); padding: 2px 6px; margin-right: 10px; vertical-align: middle; letter-spacing: 0; }
.reference { margin-top: 8px; font-size: 10px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 8px; }
.reference a:hover { color: var(--gold); }
.craft-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px 20px; list-style: none; padding: 0; margin: 0; counter-reset: craft; }
.craft-step { counter-increment: craft; }
.craft-step img { width: 100%; height: auto; aspect-ratio: 1; object-fit: contain; background: #e9e1ce; margin-bottom: 15px; }
.craft-step h3 { font-size: 22px; letter-spacing: 2px; }
.craft-step h3::before { content: counter(craft, decimal-leading-zero); font: 11px var(--sans); color: var(--gold); margin-right: 10px; }
.craft-step > p { font-size: 12px; color: var(--muted); margin-top: 8px; }
.pattern-layout { display: grid; grid-template-columns: minmax(210px, 350px) 1fr; gap: 48px; align-items: center; }
.pattern-layout img { width: 100%; height: auto; }
.pattern-layout h3 { font-size: 26px; margin-bottom: 12px; letter-spacing: 2px; }
.pattern-layout p { color: var(--muted); margin-bottom: 20px; font-size: 13px; }
.pattern-layout .knowledge p { margin-bottom: 0; }
.sources { display: grid; grid-template-columns: 1fr 2.2fr; gap: 50px; padding: 38px 0 44px; border-top: 1px solid var(--rule); }
.sources p { color: var(--muted); font-size: 12px; line-height: 2; }
#sourceList { display: grid; gap: 10px; margin-top: 20px; font-size: 12px; }
#sourceList a { text-decoration-color: var(--rule); }
#sourceList a:hover { color: var(--gold); }
.source-date { margin-top: 17px; font-size: 10px !important; }
details { font-size: 12px; margin-top: 22px; color: var(--muted); }
summary { cursor: pointer; }
details > div { padding-top: 12px; }
.site-footer { padding: 23px max(4vw, 24px); border-top: 1px solid var(--rule); color: var(--muted); font-size: 10px; display: flex; gap: 28px; align-items: center; }
.site-footer span:first-child { margin-right: auto; }
.site-footer a { text-decoration: none; }
.footer-dot { margin: 0 8px; }
.sr-only, .skip-link:not(:focus) { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link:focus { position: fixed; top: 8px; left: 8px; background: var(--paper); color: var(--ink); z-index: 10; padding: 12px; }
.no-script { padding: 30px; }
@media (min-width: 1500px) { .catalog-list { height: 500px; } }
@media (max-width: 1000px) {
  .exhibition { grid-template-columns: 205px minmax(0, 1fr); gap: 14px; }
  .catalog { padding: 22px 10px 16px; }
  .catalog-heading { margin-inline: 5px; }
  .catalog-heading h2 { font-size: 19px; }
  .catalog-item { padding: 9px 6px; gap: 9px; }
  .view-controls { gap: 15px; }
  .shape-layout { gap: 28px; }
}
@media (max-width: 700px) {
  html { scroll-padding-top: 10px; }
  .site-header { min-height: 78px; padding: 15px 18px; gap: 12px; }
  .brand { font-size: 18px; letter-spacing: 2px; gap: 7px; }
  .brand img { width: 29px; height: 29px; }
  .brand small { font-size: 8px; letter-spacing: 2px; }
  .site-header nav { gap: 15px; font-size: 11px; }
  .site-header nav a:last-child { display: none; }
  main { padding: 0 16px; }
  .intro { padding: 10px 2px; display: block; }
  .intro h1 { font-size: 17px; letter-spacing: 2px; margin: 0; }
  .intro .eyebrow { display: none; }
.intro > p { display: none; }
  .exhibition { display: flex; flex-direction: column; gap: 12px; }
  .catalog { padding: 16px 12px 8px; }
  .catalog-heading { margin-bottom: 9px; }
  .catalog-heading h2 { font-size: 18px; }
  .filters { margin-bottom: 12px; max-width: 260px; }
  .filters button { padding-bottom: 8px; }
  .catalog-list { height: auto; display: flex; gap: 7px; overflow-x: auto; padding-bottom: 7px; }
  .catalog-item { display: flex; flex-direction: column; flex-shrink: 0; width: 78px; padding: 8px 3px; gap: 5px; text-align: center; margin: 0; }
  .catalog-item img { width: 42px; height: 42px; }
  .catalog-item strong { font-size: 13px; letter-spacing: 1px; }
  .catalog-item small, .catalog-note { display: none; }
  .viewer { order: -1; }
  .viewer-heading { top: 15px; left: 20px; right: 17px; }
  .viewer-heading h2 { font-size: 20px; }
  .viewer-heading #itemSubtitle, .viewer-heading .eyebrow { display: none; }
  .viewer-heading .eyebrow { font-size: 9px; }
  .quiet-button { padding: 7px 10px; }
  #stage { height: 50svh; min-height: 340px; }
  .view-controls { gap: 17px; margin: 0 15px; padding-bottom: 12px; }
  .view-controls button { font-size: 11px; min-height: 32px; }
  .opening-control { gap: 10px; padding: 0 19px; }
  .interpretation { padding: 22px 16px; margin-top: 16px; }
  .section-heading { gap: 14px; align-items: flex-end; padding-bottom: 15px; }
  .section-heading h2, .sources h2 { font-size: 25px; letter-spacing: 2px; }
  .eyebrow { font-size: 9px; letter-spacing: 2px; }
  .tabs { gap: 14px; }
  .tabs button { font-size: 13px; padding: 8px 2px; letter-spacing: 1px; }
  .tab-panel { padding-top: 22px; }
  .shape-layout, .pattern-layout { grid-template-columns: 1fr; gap: 24px; }
  .shape-intro h3 { font-size: 24px; }
  .shape-intro p { font-size: 13px; }
  .shape-stats { gap: 18px; }
  .shape-stats div { padding-right: 18px; }
  .shape-stats dd { font-size: 23px; }
  .craft-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 14px; }
  .craft-step h3 { font-size: 19px; }
  .pattern-layout > img { width: min(80%, 300px); margin: auto; }
  .sources { grid-template-columns: 1fr; gap: 16px; padding: 26px 2px 32px; }
  .site-footer { padding: 20px 18px; flex-wrap: wrap; gap: 13px 22px; }
  .site-footer span:first-child { flex-basis: 100%; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }

.viewer-settings { position: absolute; z-index: 3; right: 20px; bottom: 16px; margin: 0; width: min(430px, calc(100% - 40px)); color: var(--paper); }
.viewer-settings summary { list-style: none; width: fit-content; margin-left: auto; background: #233134ed; border: 1px solid var(--rule); padding: 5px 12px; font-size: 18px; }
.viewer-settings summary::-webkit-details-marker { display: none; }
.settings-label { font-size: 11px; margin-left: 8px; }
.viewer-settings > .settings-content { padding: 12px 14px 4px; background: #202d30ed; border: 1px solid var(--rule); backdrop-filter: blur(8px); }
.viewer-settings .view-controls { gap: 16px; margin: 0; padding-bottom: 10px; }
.viewer-settings .view-controls button { font-size: 11px; }
.viewer-settings .opening-control { padding: 0; margin-top: 10px; }
.pattern-control { display: flex; align-items: center; gap: 18px; margin-top: 10px; font-size: 11px; }
.pattern-control select { min-width: 0; flex: 1; border: 1px solid var(--rule); padding: 5px; color: var(--paper); background: #263338; }
select:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
@media (max-width: 700px) {
  .viewer-settings { right: 10px; bottom: 10px; width: calc(100% - 20px); }
  .viewer-settings:not([open]) .settings-label { display: none; }
  .viewer-settings summary { min-width: 44px; min-height: 44px; text-align: center; }
  .catalog-note { display: none; }
}