:root {
  color-scheme: dark;
  --layout-scale: 1;
  --safe-left: 0px;
  --safe-top: 0px;
  --background: #101917;
  --background-deep: #060b0a;
  --gold: #dca852;
  --text: #efe6cf;
  --text-secondary: rgba(239, 230, 207, 0.68);
  --text-muted: rgba(239, 230, 207, 0.38);
  --jade: #61b89f;
  --rule: rgba(239, 230, 207, 0.16);
  --copy-left: 88;
  --copy-top: 61;
  --copy-width: 410;
  --font-category: 16;
  --font-title: 54;
  --font-alias: 18;
  --font-intro: 21;
  --font-body: 13.5;
  --font-feature: 17;
  --font-meta-label: 11;
  --font-meta-value: 12;
  --font-footer: 11;
  --space-category: 13;
  --space-title: 6;
  --space-alias: 15;
  --space-intro: 18;
  --space-body: 18;
  --space-feature: 22;
  --feature-gap: 9;
  --metadata-gap: 29;
  --footer-inset-x: 77;
  --footer-bottom: 36;
  --footer-height: 22;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background: var(--background-deep);
}

body {
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

button,
canvas {
  -webkit-tap-highlight-color: transparent;
}

.showcase {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  isolation: isolate;
  container-type: size;
  background:
    radial-gradient(circle at 73% 48%, rgba(97, 184, 159, 0.08), transparent 34%),
    radial-gradient(circle at 28% 42%, rgba(220, 168, 82, 0.035), transparent 38%),
    linear-gradient(117deg, var(--background) 0%, #0b1210 50%, var(--background-deep) 100%);
}

#showcase-canvas {
  position: absolute;
  z-index: 1;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  outline: 0;
  touch-action: none;
}

#mobile-point-canvas {
  position: absolute;
  z-index: 1;
  inset: 0;
  display: none;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.showcase.is-mobile-canvas-fallback #showcase-canvas {
  opacity: 0;
}

.showcase.is-mobile-canvas-fallback #mobile-point-canvas {
  display: block;
  background: transparent !important;
  mix-blend-mode: screen;
}

.showcase.is-mobile-canvas-fallback .error-state {
  display: none !important;
}

#showcase-canvas.is-dragging {
  cursor: grabbing;
}

#showcase-canvas:focus-visible {
  box-shadow: inset 0 0 0 max(1px, calc(1px * var(--layout-scale))) rgba(220, 168, 82, 0.54);
}

.background-atmosphere,
.left-reading-shade,
.texture-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.background-atmosphere {
  z-index: 0;
  background:
    radial-gradient(ellipse at 74% 49%, rgba(97, 184, 159, 0.07), transparent 31%),
    radial-gradient(ellipse at 76% 49%, rgba(97, 184, 159, 0.022), transparent 47%);
}

.left-reading-shade {
  z-index: 2;
  background: linear-gradient(
    90deg,
    rgba(6, 11, 10, 0.9) 0%,
    rgba(6, 11, 10, 0.8) 34%,
    rgba(6, 11, 10, 0.28) 50%,
    transparent 63%
  );
}

.texture-layer {
  z-index: 3;
  opacity: 0.42;
  background-image:
    linear-gradient(rgba(239, 230, 207, 0.013) 1px, transparent 1px),
    linear-gradient(90deg, rgba(239, 230, 207, 0.01) 1px, transparent 1px),
    radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.018) 0 0.6px, transparent 0.9px);
  background-size:
    calc(5px * var(--layout-scale)) calc(5px * var(--layout-scale)),
    calc(5px * var(--layout-scale)) calc(5px * var(--layout-scale)),
    calc(7px * var(--layout-scale)) calc(9px * var(--layout-scale));
  -webkit-mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.78) 50%, transparent 88%);
  mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, 0.78) 50%, transparent 88%);
}

.showcase::after {
  position: absolute;
  z-index: 4;
  inset: 0;
  content: "";
  pointer-events: none;
  box-shadow: inset 0 0 calc(86px * var(--layout-scale)) rgba(0, 0, 0, 0.42);
}

.copy-column {
  position: absolute;
  z-index: 5;
  left: calc(var(--safe-left) + var(--copy-left) * 1px * var(--layout-scale));
  top: calc(var(--safe-top) + var(--copy-top) * 1px * var(--layout-scale));
  width: calc(var(--copy-width) * 1px * var(--layout-scale));
  pointer-events: none;
  transition: opacity 700ms ease, visibility 700ms ease;
}

.copy-column p,
.copy-column h1,
.copy-column h2,
.copy-column ul {
  margin: 0;
  padding: 0;
}

.reveal-node,
.feature-list li,
.metadata-row {
  opacity: 0;
  will-change: opacity, transform;
}

.category {
  margin-bottom: calc(var(--space-category) * 1px * var(--layout-scale)) !important;
  color: var(--gold);
  font-family: Arial, Helvetica, sans-serif;
  font-size: calc(var(--font-category) * 1px * var(--layout-scale));
  font-weight: 600;
  line-height: 1.34;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}

.title-mask {
  overflow: hidden;
  margin-bottom: calc(var(--space-title) * 1px * var(--layout-scale));
}

#artifact-title {
  color: var(--gold);
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", "Source Han Serif SC", serif;
  font-size: calc(var(--font-title) * 1px * var(--layout-scale));
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: 0.09em;
  text-shadow: 0 0 calc(24px * var(--layout-scale)) rgba(220, 168, 82, 0.075);
}

.alias {
  margin-bottom: calc(var(--space-alias) * 1px * var(--layout-scale)) !important;
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(var(--font-alias) * 1px * var(--layout-scale));
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.31em;
}

.intro {
  position: relative;
  margin-bottom: calc(var(--space-intro) * 1px * var(--layout-scale)) !important;
  padding-bottom: calc(14px * var(--layout-scale)) !important;
  color: var(--text);
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  font-size: calc(var(--font-intro) * 1px * var(--layout-scale));
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.055em;
}

.intro::after {
  position: absolute;
  bottom: 0;
  left: 0;
  width: calc(92px * var(--layout-scale));
  min-height: 1px;
  height: calc(1px * var(--layout-scale));
  content: "";
  background: linear-gradient(90deg, var(--gold), transparent);
}

.body-block {
  position: relative;
  min-height: calc(101px * var(--layout-scale));
  margin-bottom: calc(var(--space-body) * 1px * var(--layout-scale));
  color: var(--text-secondary);
  font-size: calc(var(--font-body) * 1px * var(--layout-scale));
  font-weight: 400;
  line-height: 1.88;
  letter-spacing: 0.045em;
  text-align: justify;
  text-justify: inter-ideograph;
}

#body-copy {
  display: inline;
}

.typing-cursor {
  display: inline-block;
  width: max(1px, calc(1.2px * var(--layout-scale)));
  height: 1.08em;
  margin-left: calc(3px * var(--layout-scale));
  vertical-align: -0.13em;
  background: var(--gold);
  box-shadow: 0 0 calc(7px * var(--layout-scale)) rgba(220, 168, 82, 0.33);
  opacity: 0;
}

.typing-cursor.is-visible {
  animation: cursor-blink 650ms steps(1, end) infinite;
}

@keyframes cursor-blink {
  0%,
  52% {
    opacity: 0.88;
  }
  53%,
  100% {
    opacity: 0.14;
  }
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: calc(var(--feature-gap) * 1px * var(--layout-scale))
    calc(18px * var(--layout-scale));
  margin-bottom: calc(var(--space-feature) * 1px * var(--layout-scale)) !important;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: calc(17px * var(--layout-scale));
  color: var(--text);
  font-family: "Songti SC", STSong, serif;
  font-size: calc(var(--font-feature) * 1px * var(--layout-scale));
  line-height: 1.25;
  letter-spacing: 0.075em;
}

.feature-list li::before {
  position: absolute;
  left: 0;
  top: 0.49em;
  width: calc(9px * var(--layout-scale));
  min-height: 1px;
  height: calc(1px * var(--layout-scale));
  content: "";
  background: var(--gold);
}

.metadata-row {
  display: grid;
  grid-template-columns: 1fr 1.12fr;
  column-gap: calc(var(--metadata-gap) * 1px * var(--layout-scale));
  padding-top: calc(13px * var(--layout-scale));
  border-top: max(1px, calc(1px * var(--layout-scale))) solid var(--rule);
}

.metadata-row h2 {
  margin-bottom: calc(9px * var(--layout-scale));
  color: var(--text-muted);
  font-size: calc(var(--font-meta-label) * 1px * var(--layout-scale));
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.16em;
}

.palette-list,
.craft-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: calc(7px * var(--layout-scale));
  list-style: none;
}

.palette-list li {
  display: grid;
  justify-items: center;
  gap: calc(4px * var(--layout-scale));
  min-width: calc(24px * var(--layout-scale));
  color: var(--text-muted);
  font-size: calc(9.5px * var(--layout-scale));
  line-height: 1.1;
  letter-spacing: 0.04em;
}

.palette-dot {
  width: calc(10px * var(--layout-scale));
  height: calc(10px * var(--layout-scale));
  border: max(1px, calc(0.65px * var(--layout-scale))) solid rgba(239, 230, 207, 0.22);
  border-radius: 50%;
  box-shadow: 0 0 calc(7px * var(--layout-scale)) rgba(97, 184, 159, 0.07);
}

.craft-list li {
  padding: calc(4px * var(--layout-scale)) calc(7px * var(--layout-scale));
  border: max(1px, calc(0.7px * var(--layout-scale))) solid var(--rule);
  border-radius: 0;
  color: var(--text-secondary);
  font-size: calc(var(--font-meta-value) * 1px * var(--layout-scale));
  line-height: 1;
  letter-spacing: 0.07em;
}

.interaction-hint {
  position: absolute;
  z-index: 5;
  right: calc(var(--safe-left) + 78px * var(--layout-scale));
  top: calc(var(--safe-top) + 61px * var(--layout-scale));
  margin: 0;
  color: var(--text-muted);
  font-size: calc(10px * var(--layout-scale));
  letter-spacing: 0.13em;
  opacity: 0;
  transition: opacity 520ms ease;
  pointer-events: none;
}

.showcase.is-ready .interaction-hint {
  opacity: 0.58;
}

.loading-state,
.error-state {
  position: absolute;
  z-index: 8;
  left: 50%;
  top: 50%;
  min-width: calc(260px * var(--layout-scale));
  transform: translate(-50%, -50%);
  text-align: center;
}

.loading-state {
  display: grid;
  justify-items: center;
  gap: calc(9px * var(--layout-scale));
  color: var(--text-muted);
  transition: opacity 420ms ease, visibility 420ms ease;
}

.loading-state.is-hidden {
  visibility: hidden;
  opacity: 0;
}

.loading-state strong {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(11px * var(--layout-scale));
  font-weight: 500;
  letter-spacing: 0.22em;
}

.loading-state span:last-child {
  font-size: calc(11px * var(--layout-scale));
  letter-spacing: 0.09em;
}

.loading-mark {
  width: calc(24px * var(--layout-scale));
  height: calc(24px * var(--layout-scale));
  border: max(1px, calc(1px * var(--layout-scale))) solid rgba(239, 230, 207, 0.13);
  border-top-color: var(--jade);
  border-radius: 50%;
  animation: loading-spin 1.7s linear infinite;
}

@keyframes loading-spin {
  to {
    transform: rotate(360deg);
  }
}

.error-state {
  width: calc(420px * var(--layout-scale));
  padding: calc(22px * var(--layout-scale)) 0;
  border-top: max(1px, calc(1px * var(--layout-scale))) solid var(--gold);
  border-bottom: max(1px, calc(1px * var(--layout-scale))) solid var(--rule);
  background: rgba(8, 14, 12, 0.78);
}

.error-state strong {
  color: var(--gold);
  font-family: "Songti SC", STSong, serif;
  font-size: calc(21px * var(--layout-scale));
  font-weight: 400;
  letter-spacing: 0.08em;
}

.error-state p {
  margin: calc(12px * var(--layout-scale)) 0 calc(8px * var(--layout-scale));
  color: var(--text-secondary);
  font-size: calc(12px * var(--layout-scale));
  line-height: 1.7;
}

.error-state small {
  color: var(--text-muted);
  font-size: calc(10px * var(--layout-scale));
}

.timeline-footer {
  position: absolute;
  z-index: 6;
  left: calc(var(--safe-left) + var(--footer-inset-x) * 1px * var(--layout-scale));
  right: calc(var(--safe-left) + var(--footer-inset-x) * 1px * var(--layout-scale));
  bottom: calc(var(--safe-top) + var(--footer-bottom) * 1px * var(--layout-scale));
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: calc(18px * var(--layout-scale));
  height: calc(var(--footer-height) * 1px * var(--layout-scale));
}

.scene-counter {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(var(--font-footer) * 1px * var(--layout-scale));
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.18em;
  white-space: nowrap;
}

.timeline-track {
  position: relative;
  height: max(1px, calc(1px * var(--layout-scale)));
  overflow: hidden;
  background: var(--rule);
}

.timeline-track i {
  position: absolute;
  inset: 0;
  display: block;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--gold), var(--jade));
  box-shadow: 0 0 calc(6px * var(--layout-scale)) rgba(97, 184, 159, 0.2);
  will-change: transform;
}

.restart-button {
  min-width: calc(54px * var(--layout-scale));
  height: calc(24px * var(--layout-scale));
  padding: 0 calc(11px * var(--layout-scale));
  border: max(1px, calc(0.7px * var(--layout-scale))) solid var(--rule);
  border-radius: 0;
  color: var(--text-secondary);
  background: transparent;
  font: inherit;
  font-size: calc(var(--font-footer) * 1px * var(--layout-scale));
  line-height: 1;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.restart-button:hover,
.restart-button:focus-visible {
  border-color: rgba(220, 168, 82, 0.7);
  color: var(--gold);
  background: rgba(220, 168, 82, 0.045);
  outline: 0;
}

.next-page-button {
  position: absolute;
  z-index: 7;
  right: calc(var(--safe-left) + 78px * var(--layout-scale));
  bottom: calc(var(--safe-top) + 74px * var(--layout-scale));
  display: inline-flex;
  align-items: center;
  gap: calc(20px * var(--layout-scale));
  min-width: calc(132px * var(--layout-scale));
  height: calc(42px * var(--layout-scale));
  padding: 0 calc(16px * var(--layout-scale));
  border: max(1px, calc(0.8px * var(--layout-scale))) solid rgba(220, 168, 82, 0.48);
  color: var(--gold);
  background: rgba(5, 5, 4, 0.62);
  font: inherit;
  font-size: calc(12px * var(--layout-scale));
  letter-spacing: 0.18em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translate3d(0, calc(12px * var(--layout-scale)), 0);
  transition:
    opacity 620ms ease,
    visibility 620ms ease,
    transform 620ms ease,
    color 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.next-page-button i {
  margin-left: auto;
  font-family: Arial, sans-serif;
  font-size: calc(17px * var(--layout-scale));
  font-style: normal;
  line-height: 1;
  transition: transform 220ms ease;
}

.showcase.is-intro-complete:not(.is-cosmos) .next-page-button {
  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0);
}

.next-page-button:hover,
.next-page-button:focus-visible {
  border-color: var(--gold);
  color: var(--text);
  background: rgba(220, 168, 82, 0.09);
  outline: 0;
}

.next-page-button:hover i,
.next-page-button:focus-visible i {
  transform: translateX(calc(4px * var(--layout-scale)));
}

.showcase,
.background-atmosphere,
.left-reading-shade,
.texture-layer,
.timeline-footer,
.interaction-hint {
  transition:
    background 1.8s ease,
    opacity 900ms ease,
    visibility 900ms ease;
}

.showcase.is-cosmos {
  background: #020304;
}

.showcase.is-cosmos .background-atmosphere,
.showcase.is-cosmos .left-reading-shade,
.showcase.is-cosmos .texture-layer,
.showcase.is-cosmos .timeline-footer,
.showcase.is-cosmos .interaction-hint {
  opacity: 0;
  visibility: hidden;
}

.showcase.is-cosmos .copy-column {
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  scrollbar-color: transparent transparent;
}

.knowledge-view {
  position: absolute;
  z-index: 7;
  inset: 0;
  overflow: hidden;
  color: rgba(244, 241, 232, 0.92);
  background: transparent;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 1.15s ease, visibility 1.15s ease;
}

.knowledge-view.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.knowledge-view.is-visible:not(.is-settled) {
  pointer-events: none;
}

.starfield-canvas,
.cosmos-vignette {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.starfield-canvas {
  z-index: 0;
  opacity: 0;
  transition: opacity 1.2s ease 180ms;
}

.knowledge-view.is-visible .starfield-canvas {
  opacity: 1;
}

.cosmos-vignette {
  z-index: 1;
  background:
    radial-gradient(circle at 22% 52%, rgba(77, 150, 126, 0.1) 0%, rgba(24, 63, 51, 0.035) 24%, transparent 47%),
    radial-gradient(circle at 50% 44%, transparent 0%, rgba(0, 0, 0, 0.16) 58%, rgba(0, 0, 0, 0.76) 100%),
    linear-gradient(90deg, rgba(0, 0, 0, 0.26), transparent 25%, transparent 75%, rgba(0, 0, 0, 0.26));
}

.knowledge-header {
  position: absolute;
  z-index: 3;
  top: calc(var(--safe-top) + 38px * var(--layout-scale));
  left: calc(var(--safe-left) + 76px * var(--layout-scale));
  right: calc(var(--safe-left) + 76px * var(--layout-scale));
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: calc(18px * var(--layout-scale));
  padding-bottom: calc(13px * var(--layout-scale));
  border-bottom: max(1px, calc(0.7px * var(--layout-scale))) solid rgba(239, 230, 207, 0.14);
  transition: opacity 520ms ease, transform 620ms ease;
}

.knowledge-header p {
  margin: 0;
  color: rgba(239, 230, 207, 0.42);
  font-family: Arial, Helvetica, sans-serif;
  font-size: calc(9.5px * var(--layout-scale));
  letter-spacing: 0.2em;
  text-align: center;
}

.knowledge-header > span {
  justify-self: end;
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(10px * var(--layout-scale));
  letter-spacing: 0.16em;
}

.cosmos-back-button,
.detail-back-button {
  width: max-content;
  padding: 0;
  border: 0;
  color: rgba(239, 230, 207, 0.54);
  background: transparent;
  font: inherit;
  font-size: calc(10.5px * var(--layout-scale));
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: color 180ms ease, transform 180ms ease;
}

.cosmos-back-button:hover,
.cosmos-back-button:focus-visible,
.detail-back-button:hover,
.detail-back-button:focus-visible {
  color: var(--gold);
  outline: 0;
  transform: translateX(calc(-3px * var(--layout-scale)));
}

.knowledge-index,
.knowledge-detail {
  position: absolute;
  z-index: 2;
  inset: 0;
}

.knowledge-index {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(560px, 1.5fr);
  align-items: center;
  gap: calc(60px * var(--layout-scale));
  padding:
    calc(var(--safe-top) + 96px * var(--layout-scale))
    calc(var(--safe-left) + 76px * var(--layout-scale))
    calc(var(--safe-top) + 64px * var(--layout-scale));
  transition: opacity 420ms ease, transform 520ms ease, visibility 420ms ease;
}

.knowledge-view:not(.is-settled) .knowledge-header,
.knowledge-view:not(.is-settled) .knowledge-index {
  opacity: 0;
  transform: translate3d(0, calc(18px * var(--layout-scale)), 0);
}

.knowledge-view.is-detail .knowledge-index {
  opacity: 0;
  visibility: hidden;
  transform: translate3d(calc(-26px * var(--layout-scale)), 0, 0);
  pointer-events: none;
}

.knowledge-intro {
  align-self: center;
  max-width: calc(356px * var(--layout-scale));
}

.knowledge-intro p,
.knowledge-intro h1 {
  margin: 0;
}

.knowledge-kicker {
  margin-bottom: calc(14px * var(--layout-scale)) !important;
  color: var(--gold);
  font-family: Arial, Helvetica, sans-serif;
  font-size: calc(10px * var(--layout-scale));
  letter-spacing: 0.18em;
}

.knowledge-intro h1 {
  color: var(--text);
  font-family: "Songti SC", STSong, "Noto Serif CJK SC", serif;
  font-size: calc(42px * var(--layout-scale));
  font-weight: 400;
  line-height: 1.16;
  letter-spacing: 0.08em;
}

.knowledge-lead {
  margin-top: calc(22px * var(--layout-scale)) !important;
  color: rgba(239, 230, 207, 0.7);
  font-size: calc(13px * var(--layout-scale));
  line-height: 1.9;
  letter-spacing: 0.05em;
}

.knowledge-distinction {
  margin-top: calc(20px * var(--layout-scale)) !important;
  padding-top: calc(16px * var(--layout-scale));
  border-top: max(1px, calc(0.7px * var(--layout-scale))) solid rgba(220, 168, 82, 0.32);
  color: rgba(239, 230, 207, 0.42);
  font-size: calc(10.5px * var(--layout-scale));
  line-height: 1.75;
  letter-spacing: 0.04em;
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  align-self: stretch;
  min-height: min(65vh, calc(520px * var(--layout-scale)));
  max-height: calc(548px * var(--layout-scale));
  border-top: max(1px, calc(0.75px * var(--layout-scale))) solid rgba(239, 230, 207, 0.14);
  border-left: max(1px, calc(0.75px * var(--layout-scale))) solid rgba(239, 230, 207, 0.14);
}

.knowledge-card {
  position: relative;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  align-content: start;
  min-width: 0;
  padding: calc(25px * var(--layout-scale));
  overflow: hidden;
  border: 0;
  border-right: max(1px, calc(0.75px * var(--layout-scale))) solid rgba(239, 230, 207, 0.14);
  border-bottom: max(1px, calc(0.75px * var(--layout-scale))) solid rgba(239, 230, 207, 0.14);
  color: var(--text);
  background: rgba(2, 3, 4, 0.22);
  text-align: left;
  cursor: pointer;
  transition: background 260ms ease, box-shadow 300ms ease, color 260ms ease;
}

.knowledge-card::after {
  position: absolute;
  inset: 0;
  content: "";
  border: max(1px, calc(1px * var(--layout-scale))) solid transparent;
  background: radial-gradient(circle at 22% 24%, rgba(255, 255, 255, 0.075), transparent 44%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 260ms ease, border-color 260ms ease;
}

.knowledge-card:hover,
.knowledge-card:focus-visible,
.knowledge-card.is-active {
  color: #fffdf6;
  background: rgba(15, 17, 18, 0.64);
  box-shadow: inset 0 0 calc(54px * var(--layout-scale)) rgba(255, 255, 255, 0.035);
  outline: 0;
}

.knowledge-card:hover::after,
.knowledge-card:focus-visible::after,
.knowledge-card.is-active::after {
  border-color: rgba(220, 168, 82, 0.48);
  opacity: 1;
}

.knowledge-card-number {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(11px * var(--layout-scale));
  letter-spacing: 0.16em;
}

.knowledge-card h2 {
  margin: calc(14px * var(--layout-scale)) 0 calc(11px * var(--layout-scale));
  font-family: "Songti SC", STSong, serif;
  font-size: calc(21px * var(--layout-scale));
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0.055em;
}

.knowledge-card p {
  margin: 0;
  color: rgba(239, 230, 207, 0.51);
  font-size: calc(10.8px * var(--layout-scale));
  line-height: 1.75;
  letter-spacing: 0.035em;
}

.knowledge-card-enter {
  align-self: end;
  margin-top: calc(14px * var(--layout-scale));
  color: rgba(220, 168, 82, 0.62);
  font-size: calc(9px * var(--layout-scale));
  letter-spacing: 0.14em;
}

.knowledge-card-enter::after {
  content: "  →";
}

.knowledge-detail {
  overflow: auto;
  padding:
    calc(var(--safe-top) + 104px * var(--layout-scale))
    calc(var(--safe-left) + 92px * var(--layout-scale))
    calc(var(--safe-top) + 58px * var(--layout-scale));
  opacity: 0;
  visibility: hidden;
  transform: translate3d(calc(28px * var(--layout-scale)), 0, 0);
  transition: opacity 480ms ease 110ms, transform 560ms ease 80ms, visibility 480ms ease;
  scrollbar-color: rgba(220, 168, 82, 0.42) transparent;
}

.knowledge-view.is-detail .knowledge-detail {
  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0);
}

.detail-back-button {
  margin-bottom: calc(28px * var(--layout-scale));
}

.detail-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: calc(25px * var(--layout-scale));
  max-width: calc(1000px * var(--layout-scale));
}

.detail-number {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: calc(46px * var(--layout-scale));
  font-weight: 400;
  line-height: 1;
  opacity: 0.86;
}

.detail-heading p,
.detail-heading h1 {
  margin: 0;
}

.detail-heading > div > p:first-child {
  margin-bottom: calc(9px * var(--layout-scale));
  color: rgba(239, 230, 207, 0.34);
  font-family: Arial, Helvetica, sans-serif;
  font-size: calc(9px * var(--layout-scale));
  letter-spacing: 0.21em;
}

.detail-heading h1 {
  color: var(--text);
  font-family: "Songti SC", STSong, serif;
  font-size: calc(36px * var(--layout-scale));
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: 0.06em;
}

.detail-summary {
  max-width: calc(760px * var(--layout-scale));
  margin-top: calc(13px * var(--layout-scale)) !important;
  color: rgba(239, 230, 207, 0.56);
  font-size: calc(11.5px * var(--layout-scale));
  line-height: 1.75;
  letter-spacing: 0.04em;
}

.detail-columns {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: calc(62px * var(--layout-scale));
  max-width: calc(1100px * var(--layout-scale));
  margin-top: calc(38px * var(--layout-scale));
}

.detail-section {
  padding-top: calc(17px * var(--layout-scale));
  border-top: max(1px, calc(0.8px * var(--layout-scale))) solid rgba(239, 230, 207, 0.18);
}

.detail-section h2 {
  margin: 0 0 calc(20px * var(--layout-scale));
  color: var(--gold);
  font-size: calc(11px * var(--layout-scale));
  font-weight: 500;
  letter-spacing: 0.17em;
}

.detail-section ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: evidence;
}

.detail-section li {
  position: relative;
  margin: 0 0 calc(17px * var(--layout-scale));
  padding-left: calc(33px * var(--layout-scale));
  color: rgba(239, 230, 207, 0.72);
  font-size: calc(11.4px * var(--layout-scale));
  line-height: 1.9;
  letter-spacing: 0.035em;
  counter-increment: evidence;
}

.detail-section li::before {
  position: absolute;
  left: 0;
  top: 0.04em;
  color: rgba(220, 168, 82, 0.62);
  font-family: Georgia, "Times New Roman", serif;
  content: "0" counter(evidence);
}

.interpretation-section p {
  margin: 0 0 calc(17px * var(--layout-scale));
  color: rgba(239, 230, 207, 0.72);
  font-family: "Songti SC", STSong, serif;
  font-size: calc(12px * var(--layout-scale));
  line-height: 1.98;
  letter-spacing: 0.045em;
  text-align: justify;
}

.detail-sources {
  max-width: calc(1100px * var(--layout-scale));
  margin: calc(18px * var(--layout-scale)) 0 0;
  padding-top: calc(14px * var(--layout-scale));
  border-top: max(1px, calc(0.7px * var(--layout-scale))) solid rgba(239, 230, 207, 0.1);
  color: rgba(239, 230, 207, 0.3);
  font-size: calc(9px * var(--layout-scale));
  line-height: 1.6;
  letter-spacing: 0.04em;
}

/* Yellow-jade knowledge landscape -------------------------------------------------
   The reference composition keeps the artifact in a central pool of green-black
   atmosphere while four transparent topics sit on the surrounding mountain ridges. */
.knowledge-view {
  --knowledge-gold: 216, 180, 90;
  --detail-origin-x: 50%;
  --detail-origin-y: 50%;
  color: rgb(var(--knowledge-gold));
}

.showcase.is-cosmos {
  background: #020403;
}

.cosmos-vignette {
  background:
    radial-gradient(ellipse at 51% 43%, rgba(58, 74, 42, 0.24) 0%, rgba(31, 43, 24, 0.11) 28%, transparent 53%),
    linear-gradient(104deg, transparent 38%, rgba(86, 101, 62, 0.055) 48%, rgba(83, 97, 59, 0.075) 53%, transparent 63%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.25) 0%, transparent 28%, rgba(0, 0, 0, 0.16) 72%, rgba(0, 0, 0, 0.45) 100%),
    radial-gradient(ellipse at 50% 50%, transparent 34%, rgba(0, 0, 0, 0.78) 100%);
}

.knowledge-header {
  top: calc(var(--safe-top) + 28px * var(--layout-scale));
  padding-bottom: calc(10px * var(--layout-scale));
  border-bottom-color: rgba(var(--knowledge-gold), 0.16);
}

.knowledge-header p,
.knowledge-header > span,
.cosmos-back-button,
.detail-back-button {
  color: rgba(var(--knowledge-gold), 0.58);
}

.cosmos-back-button:hover,
.cosmos-back-button:focus-visible,
.detail-back-button:hover,
.detail-back-button:focus-visible {
  color: rgb(var(--knowledge-gold));
}

.knowledge-index {
  display: block;
  padding: 0;
  filter: blur(0);
  transform-origin: var(--detail-origin-x) var(--detail-origin-y);
  transition: opacity 460ms ease, filter 560ms ease, transform 680ms cubic-bezier(0.16, 0.74, 0.2, 1), visibility 460ms ease;
}

.knowledge-view.is-opening-detail .knowledge-index {
  opacity: 0.22;
  filter: blur(calc(2.4px * var(--layout-scale)));
  transform: scale(1.008);
  pointer-events: none;
}

.knowledge-view.is-opening-detail .starfield-canvas,
.knowledge-view.is-detail-arriving .starfield-canvas {
  z-index: 6;
  opacity: 1;
}

.knowledge-view.is-opening-detail .knowledge-header {
  opacity: 0.34;
  transform: translate3d(0, calc(-4px * var(--layout-scale)), 0);
}

.knowledge-intro {
  position: absolute;
  z-index: 4;
  top: calc(var(--safe-top) + 83px * var(--layout-scale));
  left: calc(var(--safe-left) + 76px * var(--layout-scale));
  width: calc(286px * var(--layout-scale));
  max-width: none;
  pointer-events: none;
  transition: opacity 360ms ease, filter 480ms ease, transform 560ms ease;
}

.knowledge-view.is-opening-detail .knowledge-intro {
  opacity: 0.12;
  filter: blur(calc(5px * var(--layout-scale)));
  transform: translate3d(calc(-8px * var(--layout-scale)), 0, 0);
}

.knowledge-kicker {
  margin-bottom: calc(9px * var(--layout-scale)) !important;
  color: rgba(var(--knowledge-gold), 0.72);
  font-size: calc(8.5px * var(--layout-scale));
}

.knowledge-intro h1 {
  max-width: calc(276px * var(--layout-scale));
  color: rgb(var(--knowledge-gold));
  font-size: calc(26px * var(--layout-scale));
  line-height: 1.25;
  letter-spacing: 0.065em;
}

.knowledge-lead {
  max-width: calc(264px * var(--layout-scale));
  margin-top: calc(12px * var(--layout-scale)) !important;
  color: rgba(var(--knowledge-gold), 0.61);
  font-size: calc(10px * var(--layout-scale));
  line-height: 1.75;
}

.knowledge-distinction {
  display: none;
}

.knowledge-grid {
  position: absolute;
  z-index: 3;
  inset: 0;
  display: block;
  min-height: 0;
  overflow: visible;
  height: auto;
  max-height: none;
  border: 0;
}

.knowledge-card {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  width: calc(230px * var(--layout-scale));
  height: calc(142px * var(--layout-scale));
  min-height: 0;
  overflow: visible;
  padding: calc(12px * var(--layout-scale)) calc(16px * var(--layout-scale));
  border: 0;
  color: rgb(var(--knowledge-gold));
  background: transparent;
  text-shadow: 0 0 calc(12px * var(--layout-scale)) rgba(0, 0, 0, 0.9);
  transition: color 280ms ease, filter 280ms ease, opacity 320ms ease, transform 420ms ease;
}

.knowledge-card:nth-child(1) {
  left: calc(var(--safe-left) + 265px * var(--layout-scale));
  top: calc(var(--safe-top) + 252px * var(--layout-scale));
}

.knowledge-card:nth-child(2) {
  left: calc(var(--safe-left) + 218px * var(--layout-scale));
  top: calc(var(--safe-top) + 492px * var(--layout-scale));
}

.knowledge-card:nth-child(3) {
  right: calc(var(--safe-left) + 205px * var(--layout-scale));
  top: calc(var(--safe-top) + 252px * var(--layout-scale));
}

.knowledge-card:nth-child(4) {
  right: calc(var(--safe-left) + 164px * var(--layout-scale));
  top: calc(var(--safe-top) + 492px * var(--layout-scale));
}

.knowledge-card::after {
  inset: calc(-16px * var(--layout-scale));
  border: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--knowledge-gold), 0.065) 0%, rgba(var(--knowledge-gold), 0.018) 46%, transparent 72%);
}

.knowledge-card:hover,
.knowledge-card:focus-visible,
.knowledge-card.is-active {
  color: rgb(var(--knowledge-gold));
  background: transparent;
  box-shadow: none;
  filter: brightness(1.24);
  transform: translate3d(0, calc(-2px * var(--layout-scale)), 0);
}

.knowledge-view.is-opening-detail .knowledge-card:not(.is-active) {
  opacity: 0.16;
}

.knowledge-view.is-opening-detail .knowledge-card.is-active {
  opacity: 1;
  filter: brightness(1.55) drop-shadow(0 0 calc(9px * var(--layout-scale)) rgba(var(--knowledge-gold), 0.28));
  transform: scale(1.035);
}

.knowledge-card:hover::after,
.knowledge-card:focus-visible::after,
.knowledge-card.is-active::after {
  border-color: transparent;
  opacity: 1;
}

.knowledge-card-number {
  display: none;
}

.knowledge-card h2 {
  max-width: calc(205px * var(--layout-scale));
  margin: 0;
  color: rgba(var(--knowledge-gold), 0.78);
  font-size: calc(9px * var(--layout-scale));
  line-height: 1.52;
  letter-spacing: 0.075em;
}

.knowledge-card p {
  display: none;
}

.knowledge-card-enter {
  display: none;
}

.knowledge-detail {
  padding:
    calc(var(--safe-top) + 86px * var(--layout-scale))
    calc(var(--safe-left) + 105px * var(--layout-scale))
    calc(var(--safe-top) + 44px * var(--layout-scale));
  background: linear-gradient(90deg, rgba(3, 3, 2, 0.88) 0%, rgba(3, 3, 2, 0.62) 62%, rgba(3, 3, 2, 0.34) 100%);
  opacity: 0;
  visibility: hidden;
  filter: blur(calc(3.5px * var(--layout-scale)));
  transform: translate3d(0, calc(8px * var(--layout-scale)), 0);
  will-change: filter, opacity, transform;
  transition:
    filter 520ms ease,
    opacity 440ms ease,
    transform 620ms cubic-bezier(0.16, 0.74, 0.2, 1),
    visibility 440ms ease;
}

.knowledge-view.is-detail .knowledge-detail {
  opacity: 1;
  visibility: visible;
  filter: blur(0);
  transform: translate3d(0, 0, 0);
}

.detail-heading,
.detail-columns,
.detail-sources {
  opacity: 0;
  transform: translate3d(0, calc(16px * var(--layout-scale)), 0);
  transition: opacity 520ms ease, transform 680ms cubic-bezier(0.16, 0.74, 0.2, 1);
}

.knowledge-view.is-detail .detail-heading {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition-delay: 70ms;
}

.knowledge-view.is-detail .detail-columns {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition-delay: 150ms;
}

.knowledge-view.is-detail .detail-sources {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition-delay: 250ms;
}

.detail-back-button {
  margin-bottom: calc(19px * var(--layout-scale));
}

.detail-heading {
  max-width: calc(920px * var(--layout-scale));
  gap: calc(18px * var(--layout-scale));
}

.detail-number,
.detail-heading h1,
.detail-section h2 {
  color: rgb(var(--knowledge-gold));
}

.detail-number {
  font-size: calc(34px * var(--layout-scale));
}

.detail-heading > div > p:first-child,
.detail-summary,
.detail-sources {
  color: rgba(var(--knowledge-gold), 0.42);
}

.detail-heading h1 {
  font-size: calc(28px * var(--layout-scale));
}

.detail-summary {
  max-width: calc(680px * var(--layout-scale));
  font-size: calc(9.8px * var(--layout-scale));
}

.detail-columns {
  max-width: calc(980px * var(--layout-scale));
  margin-top: calc(27px * var(--layout-scale));
  gap: calc(48px * var(--layout-scale));
}

.detail-section {
  border-top-color: rgba(var(--knowledge-gold), 0.2);
}

.detail-section h2 {
  margin-bottom: calc(14px * var(--layout-scale));
  font-size: calc(9.5px * var(--layout-scale));
}

.detail-section li,
.interpretation-section p {
  color: rgba(var(--knowledge-gold), 0.68);
  font-size: calc(10.2px * var(--layout-scale));
  line-height: 1.84;
}

.detail-section li::before {
  color: rgba(var(--knowledge-gold), 0.62);
}

.detail-sources {
  max-width: calc(980px * var(--layout-scale));
  border-top-color: rgba(var(--knowledge-gold), 0.12);
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (prefers-reduced-motion: reduce) {
  .loading-mark {
    animation-duration: 4s;
  }

  .typing-cursor.is-visible {
    animation: none;
    opacity: 0.72;
  }

  .knowledge-view::after,
  .knowledge-detail::after {
    animation: none !important;
  }

  .knowledge-view,
  .knowledge-index,
  .knowledge-detail,
  .starfield-canvas,
  .next-page-button {
    transition-duration: 80ms !important;
    transition-delay: 0ms !important;
  }
}

@media (orientation: portrait) and (min-width: 761px) {
  .showcase {
    min-height: 100dvh;
    background:
      radial-gradient(circle at 52% 24%, rgba(97, 184, 159, 0.1), transparent 31%),
      linear-gradient(180deg, #0b1512 0%, #07100e 46%, #050a09 100%);
  }

  .background-atmosphere {
    background: radial-gradient(ellipse at 52% 25%, rgba(97, 184, 159, 0.09), transparent 38%);
  }

  .left-reading-shade {
    background: linear-gradient(180deg, transparent 0%, rgba(5, 10, 9, 0.06) 34%, rgba(5, 10, 9, 0.92) 55%, #050a09 100%);
  }

  .texture-layer {
    opacity: 0.3;
    -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.8) 58%, transparent 100%);
    mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.8) 58%, transparent 100%);
  }

  .copy-column {
    left: max(20px, env(safe-area-inset-left));
    right: max(20px, env(safe-area-inset-right));
    top: 45dvh;
    bottom: calc(112px + env(safe-area-inset-bottom));
    width: auto;
    padding-right: 8px;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    pointer-events: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(220, 168, 82, 0.34) transparent;
    -webkit-overflow-scrolling: touch;
  }

  .category {
    margin-bottom: 6px !important;
    font-size: 10px;
    letter-spacing: 0.16em;
  }

  #artifact-title {
    font-size: clamp(30px, 8.7vw, 38px);
    line-height: 1.05;
  }

  .title-mask {
    margin-bottom: 5px;
  }

  .alias {
    margin-bottom: 9px !important;
    font-size: 11px;
    letter-spacing: 0.22em;
  }

  .intro {
    margin-bottom: 10px !important;
    padding-bottom: 10px !important;
    font-size: 14px;
    line-height: 1.45;
  }

  .body-block {
    min-height: 0;
    margin-bottom: 12px;
    font-size: 11.5px;
    line-height: 1.72;
    text-align: left;
  }

  .feature-list {
    gap: 7px 12px;
    margin-bottom: 12px !important;
  }

  .feature-list li {
    padding-left: 12px;
    font-size: 12px;
    line-height: 1.3;
  }

  .metadata-row {
    display: none;
  }

  .interaction-hint {
    top: calc(16px + env(safe-area-inset-top));
    right: max(18px, env(safe-area-inset-right));
    font-size: 9px;
  }

  .timeline-footer {
    left: max(20px, env(safe-area-inset-left));
    right: max(20px, env(safe-area-inset-right));
    bottom: calc(18px + env(safe-area-inset-bottom));
    gap: 12px;
    height: 28px;
  }

  .scene-counter,
  .restart-button {
    font-size: 10px;
  }

  .restart-button {
    min-width: 58px;
    height: 30px;
  }

  .knowledge-header {
    top: calc(18px + env(safe-area-inset-top));
    left: max(18px, env(safe-area-inset-left));
    right: max(18px, env(safe-area-inset-right));
    grid-template-columns: 1fr auto;
  }

  .knowledge-header p {
    display: none;
  }

  .knowledge-index {
    display: block;
    overflow: auto;
    padding:
      calc(78px + env(safe-area-inset-top))
      max(18px, env(safe-area-inset-right))
      calc(38px + env(safe-area-inset-bottom))
      max(18px, env(safe-area-inset-left));
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .knowledge-intro {
    position: relative;
    top: auto;
    left: auto;
    width: auto;
    max-width: none;
    margin-bottom: clamp(265px, 38dvh, 350px);
  }

  .knowledge-intro h1 {
    font-size: 24px;
  }

  .knowledge-lead {
    font-size: 11px;
  }

  .knowledge-grid {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(2, minmax(0, 1fr));
    width: 100%;
    height: auto;
    max-height: none;
    min-height: 0;
    gap: 8px;
  }

  .knowledge-card {
    position: relative;
    inset: auto !important;
    width: auto;
    height: auto;
    min-height: 104px;
    overflow: hidden;
    padding: 14px;
    border: 1px solid rgba(var(--knowledge-gold), 0.09);
    background: rgba(4, 5, 3, 0.24);
  }

  .knowledge-card h2 {
    font-size: 12px;
    line-height: 1.45;
  }

  .knowledge-card p {
    font-size: 9px;
  }

  .knowledge-detail {
    padding:
      calc(82px + env(safe-area-inset-top))
      max(20px, env(safe-area-inset-right))
      calc(48px + env(safe-area-inset-bottom))
      max(20px, env(safe-area-inset-left));
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .detail-heading {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .detail-number {
    font-size: 34px;
  }

  .detail-heading h1 {
    font-size: 28px;
  }

  .detail-summary {
    font-size: 12px;
  }

  .detail-columns {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 28px;
  }

  .detail-section h2 {
    font-size: 11px;
  }

  .detail-section li,
  .interpretation-section p {
    font-size: 12px;
  }

  .next-page-button {
    right: max(20px, env(safe-area-inset-right));
    bottom: calc(62px + env(safe-area-inset-bottom));
    min-width: 124px;
    height: 44px;
    font-size: 12px;
  }

  .loading-state,
  .error-state {
    width: min(calc(100vw - 40px), 360px);
    min-width: 0;
  }
}

@media (hover: none) and (pointer: coarse) {
  .knowledge-card:active {
    filter: brightness(1.7);
    transform: scale(0.985);
  }

  .next-page-button:active,
  .detail-back-button:active,
  .cosmos-back-button:active {
    color: rgb(var(--knowledge-gold));
    border-color: rgba(var(--knowledge-gold), 0.82);
  }
}

@media (orientation: landscape) and (max-height: 540px),
  (orientation: portrait) and (max-width: 760px) {
  .showcase {
    background:
      radial-gradient(circle at 72% 48%, rgba(97, 184, 159, 0.1), transparent 35%),
      linear-gradient(112deg, #0d1715 0%, #08100e 56%, #050908 100%);
  }

  .left-reading-shade {
    background: linear-gradient(90deg, rgba(5, 10, 9, 0.94) 0%, rgba(5, 10, 9, 0.8) 38%, transparent 62%);
  }

  .copy-column {
    left: max(24px, env(safe-area-inset-left));
    right: auto;
    top: calc(18px + env(safe-area-inset-top));
    bottom: calc(52px + env(safe-area-inset-bottom));
    width: min(42%, 360px);
    padding-right: 8px;
    overflow-x: hidden;
    overflow-y: auto;
    pointer-events: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(220, 168, 82, 0.32) transparent;
  }

  .category {
    margin-bottom: 5px !important;
    font-size: 9px;
  }

  #artifact-title {
    font-size: 30px;
  }

  .title-mask {
    margin-bottom: 4px;
  }

  .alias {
    margin-bottom: 7px !important;
    font-size: 10px;
    letter-spacing: 0.16em;
  }

  .intro {
    margin-bottom: 8px !important;
    padding-bottom: 8px !important;
    font-size: 12px;
    line-height: 1.42;
  }

  .body-block {
    min-height: 0;
    margin-bottom: 9px;
    font-size: 10.5px;
    line-height: 1.62;
    text-align: left;
  }

  .feature-list {
    gap: 5px 10px;
    margin-bottom: 0 !important;
  }

  .feature-list li {
    padding-left: 11px;
    font-size: 10.5px;
  }

  .metadata-row {
    display: none;
  }

  .interaction-hint {
    top: calc(12px + env(safe-area-inset-top));
    right: max(20px, env(safe-area-inset-right));
    font-size: 8px;
  }

  .timeline-footer {
    left: max(24px, env(safe-area-inset-left));
    right: max(24px, env(safe-area-inset-right));
    bottom: calc(10px + env(safe-area-inset-bottom));
    gap: 12px;
    height: 26px;
  }

  .next-page-button {
    right: max(24px, env(safe-area-inset-right));
    bottom: calc(43px + env(safe-area-inset-bottom));
    min-width: 112px;
    height: 36px;
    padding: 0 13px;
    font-size: 10px;
  }

  .knowledge-header {
    top: calc(12px + env(safe-area-inset-top));
    left: max(24px, env(safe-area-inset-left));
    right: max(24px, env(safe-area-inset-right));
  }

  .knowledge-intro {
    top: calc(48px + env(safe-area-inset-top));
    left: max(28px, env(safe-area-inset-left));
    width: 156px;
  }

  .knowledge-kicker {
    margin-bottom: 4px !important;
    font-size: 5.5px;
  }

  .knowledge-intro h1 {
    max-width: none;
    font-size: 10px;
    line-height: 1.35;
    white-space: nowrap;
  }

  .knowledge-lead {
    display: none;
  }

  .knowledge-card {
    width: 150px;
    height: 44px;
    padding: 6px 8px;
    border: 0;
    align-items: center;
    text-align: center;
    background: transparent;
  }

  .knowledge-card:nth-child(1) {
    left: calc(28.5% - 75px);
    right: auto;
    top: calc(43% - 22px);
  }

  .knowledge-card:nth-child(2) {
    left: calc(26.5% - 75px);
    right: auto;
    top: calc(76% - 22px);
  }

  .knowledge-card:nth-child(3) {
    left: calc(75.5% - 75px);
    right: auto;
    top: calc(43% - 22px);
  }

  .knowledge-card:nth-child(4) {
    left: calc(77.5% - 75px);
    right: auto;
    top: calc(76% - 22px);
  }

  .knowledge-card h2 {
    max-width: none;
    font-size: 8px;
    line-height: 1.4;
    white-space: nowrap;
  }

  .knowledge-detail {
    padding:
      calc(54px + env(safe-area-inset-top))
      max(42px, env(safe-area-inset-right))
      calc(30px + env(safe-area-inset-bottom))
      max(42px, env(safe-area-inset-left));
  }

  .detail-back-button {
    margin-bottom: 10px;
  }

  .detail-heading h1 {
    font-size: 24px;
  }

  .detail-columns {
    gap: 32px;
    margin-top: 20px;
  }

  .detail-section li,
  .interpretation-section p {
    font-size: 10px;
    line-height: 1.7;
  }
}

/* iOS Safari cannot lock the system orientation from a normal web page.
   Rotate and resize the complete stage so mobile entry is always landscape. */
@media (orientation: portrait) and (max-width: 760px) {
  html,
  body {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
  }

  .showcase {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 100dvh;
    height: 100dvw;
    min-width: 100dvh;
    min-height: 100dvw;
    transform: translate(-50%, -50%) rotate(90deg);
    transform-origin: 50% 50%;
  }
}

@supports not (height: 100dvh) {
  @media (orientation: portrait) and (max-width: 760px) {
    .showcase {
      width: 100vh;
      height: 100vw;
      min-width: 100vh;
      min-height: 100vw;
    }
  }
}