:root {
  --color-ink: #1a1815;
  --color-paper: #f2e8d5;
  --color-gold: #c9a961;
  --color-red: #b33a3a;
  --color-cream: #f8f5ec;
  --color-brown: #6b4f3a;
  --color-umber: #4a2c2a;
  --color-light-gold: #e0c88a;
  --font-heading: "Playfair Display", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-body: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-height: 72px;
  --shadow-hard: 8px 8px 0 rgba(74, 44, 42, 0.55);
  --shadow-gold: 6px 6px 0 rgba(201, 169, 97, 0.28);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-ink);
  color: var(--color-cream);
  font-family: var(--font-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

#main-content {
  display: block;
  scroll-margin-top: calc(var(--header-height) + 28px);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 1rem;
  color: var(--color-cream);
  text-wrap: balance;
}

p {
  margin: 0 0 1rem;
}

a {
  color: var(--color-light-gold);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--color-gold);
}

:focus-visible {
  outline: 3px solid var(--color-light-gold);
  outline-offset: 3px;
}

.page-content {
  padding-top: clamp(5.5rem, 9vw, 7rem);
}

.container {
  width: min(100% - 2rem, 1320px);
  margin-inline: auto;
}

.section {
  padding-block: clamp(4rem, 8vw, 8rem);
}

.section-heading {
  font-size: clamp(2rem, 6vw, 4.5rem);
  line-height: 1;
  margin-bottom: 1.5rem;
}

.section-copy {
  max-width: 64ch;
  color: var(--color-cream);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2000;
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.15rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--color-umber);
  box-shadow: 5px 5px 0 var(--color-umber);
  transform: translateY(-250%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(to bottom, rgba(26, 24, 21, 0.72), transparent);
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(26, 24, 21, 0.96);
  border-bottom-color: rgba(201, 169, 97, 0.42);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.38);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-gold), var(--color-red));
  box-shadow: 0 0 8px rgba(201, 169, 97, 0.45);
  z-index: 2;
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 1rem;
  width: min(100% - 2rem, 1400px);
  margin-inline: auto;
  padding: 0.85rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-cream);
  text-decoration: none;
  font-family: var(--font-heading);
  flex-shrink: 0;
}

.brand:hover {
  color: var(--color-cream);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: var(--color-umber);
  color: var(--color-gold);
  border: 2px solid var(--color-gold);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  box-shadow: 4px 4px 0 var(--color-brown);
  transform: rotate(-2deg);
  transition: transform 0.25s ease;
}

.brand:hover .brand__mark {
  transform: rotate(0deg) translateY(-2px);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-paper);
}

.brand__tagline {
  font-family: var(--font-data);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--color-light-gold);
  text-transform: uppercase;
}

.site-nav {
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.5rem 0.75rem;
  color: var(--color-cream);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.35rem;
  height: 2px;
  background: transparent;
  transition: background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-light-gold);
  border-color: rgba(201, 169, 97, 0.35);
  background: rgba(201, 169, 97, 0.08);
}

.nav-link[aria-current="page"] {
  color: var(--color-gold);
}

.nav-link[aria-current="page"]::after {
  background: var(--color-gold);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header-update {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid rgba(201, 169, 97, 0.5);
  background: rgba(26, 24, 21, 0.25);
  color: var(--color-paper);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.header-update:hover {
  border-color: var(--color-gold);
  color: var(--color-light-gold);
  box-shadow: inset 0 -2px 0 var(--color-light-gold);
}

.header-update__text {
  line-height: 1;
}

.header-update__dot {
  position: relative;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-red);
  border-radius: 50%;
  flex-shrink: 0;
}

.header-update__dot::after {
  content: "";
  position: absolute;
  inset: -0.3rem;
  border: 1px solid rgba(179, 58, 58, 0.7);
  border-radius: 50%;
  animation: update-pulse 2s ease-out infinite;
}

@keyframes update-pulse {
  0% {
    transform: scale(0.5);
    opacity: 0.9;
  }
  70%,
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.7rem;
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-paper);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle:hover {
  background: rgba(201, 169, 97, 0.15);
  color: var(--color-light-gold);
}

.nav-toggle__icon {
  position: relative;
  width: 1.2rem;
  height: 1.1rem;
  display: inline-block;
}

.nav-toggle__icon::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  background: var(--color-gold);
  transform: translateY(-50%);
  box-shadow: 0 -0.35rem 0 var(--color-gold), 0 0.35rem 0 var(--color-gold);
  transition: transform 0.25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon {
  transform: rotate(180deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before {
  transform: translateY(-50%) scaleX(0.6);
}

.site-footer {
  position: relative;
  background: var(--color-ink);
  border-top: 3px solid var(--color-umber);
  color: var(--color-paper);
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-umber), var(--color-gold), var(--color-red));
}

.site-footer__inner {
  width: min(100% - 2rem, 1400px);
  margin-inline: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-block {
  padding-top: 1rem;
  border-top: 1px solid rgba(201, 169, 97, 0.25);
}

.footer-block--brand {
  border-top-color: var(--color-gold);
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-gold);
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.footer-statement {
  color: rgba(242, 232, 213, 0.75);
  font-size: 0.95rem;
  max-width: 36rem;
  margin-top: 1rem;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.footer-link {
  color: rgba(248, 245, 236, 0.78);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--color-light-gold);
}

.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: rgba(248, 245, 236, 0.72);
}

.footer-contact a {
  color: var(--color-light-gold);
  text-decoration: none;
  font-weight: 600;
}

.footer-contact a:hover {
  text-decoration: underline;
}

.site-footer__bottom {
  border-top: 1px solid rgba(201, 169, 97, 0.2);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.footer-meta {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: rgba(242, 232, 213, 0.6);
}

.panel {
  border: 2px solid var(--color-umber);
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  position: relative;
}

.panel--dark {
  background: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-gold);
}

.panel h1,
.panel h2,
.panel h3,
.panel h4,
.card h1,
.card h2,
.card h3,
.card h4,
.exhibit-card h1,
.exhibit-card h2,
.exhibit-card h3,
.exhibit-card h4 {
  color: inherit;
}

.card {
  border: 2px solid var(--color-umber);
  background: var(--color-paper);
  color: var(--color-ink);
  box-shadow: 6px 6px 0 var(--color-brown);
  padding: 1.25rem;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--color-umber);
}

.card--dark {
  background: var(--color-ink);
  color: var(--color-paper);
  border-color: rgba(201, 169, 97, 0.6);
  box-shadow: 6px 6px 0 rgba(201, 169, 97, 0.22);
}

.card--dark:hover {
  box-shadow: 8px 8px 0 rgba(201, 169, 97, 0.32);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.card__meta {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--color-brown);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.card--dark .card__meta {
  color: var(--color-light-gold);
}

.card__body {
  margin-top: 0.75rem;
  font-size: 0.95rem;
}

.exhibit-card {
  position: relative;
  background: var(--color-paper);
  color: var(--color-ink);
  border: 2px solid var(--color-umber);
  box-shadow: 6px 6px 0 var(--color-brown);
  padding: 1.25rem 1.5rem;
}

.exhibit-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-red);
}

.exhibit-card__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.exhibit-card__text {
  font-size: 0.9rem;
  color: rgba(26, 24, 21, 0.78);
}

.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid currentColor;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.exhibit-caption {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-brown);
  border-left: 3px solid var(--color-red);
  padding-left: 0.75rem;
  margin-top: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border: 2px solid var(--color-gold);
  background: transparent;
  color: var(--color-gold);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.1;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background: var(--color-gold);
  color: var(--color-ink);
  box-shadow: 6px 6px 0 var(--color-umber);
}

.btn--primary {
  background: var(--color-gold);
  color: var(--color-ink);
  border-color: var(--color-gold);
}

.btn--primary:hover {
  background: var(--color-light-gold);
  border-color: var(--color-light-gold);
  box-shadow: 6px 6px 0 var(--color-umber);
}

.btn--outline {
  border-color: var(--color-light-gold);
  color: var(--color-light-gold);
}

.btn--outline:hover {
  background: var(--color-light-gold);
  color: var(--color-ink);
  border-color: var(--color-light-gold);
}

.btn--ghost {
  border-color: transparent;
  color: rgba(248, 245, 236, 0.75);
}

.btn--ghost:hover {
  background: transparent;
  color: var(--color-light-gold);
  box-shadow: none;
  border-color: transparent;
}

.breadcrumbs {
  margin-bottom: 2rem;
  font-size: 0.85rem;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--color-brown);
}

.breadcrumbs__link {
  color: var(--color-light-gold);
  text-decoration: none;
}

.breadcrumbs__link:hover {
  text-decoration: underline;
}

.breadcrumbs__current {
  color: var(--color-gold);
  font-weight: 600;
}

.grid {
  display: grid;
  gap: 2rem 1.25rem;
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-umber);
  border: 2px solid var(--color-umber);
  box-shadow: 8px 8px 0 var(--color-brown);
}

.image-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 0 1px rgba(201, 169, 97, 0.35);
  pointer-events: none;
  z-index: 2;
}

.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.05) sepia(0.16);
}

.image-placeholder {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 220px;
  background: linear-gradient(135deg, #3a2b24 0%, #241d18 60%, #1a1815 100%);
  position: relative;
}

.image-placeholder::before {
  content: "IMAGE";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: rgba(201, 169, 97, 0.55);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  border: 1px solid rgba(201, 169, 97, 0.35);
  padding: 0.4rem 0.8rem;
  text-align: center;
}

.image-frame--ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.image-frame--ratio-3-2 {
  aspect-ratio: 3 / 2;
}

.image-frame--portrait {
  aspect-ratio: 3 / 4;
}

.image-frame--landscape {
  aspect-ratio: 21 / 9;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--color-cream);
}

.data-table th {
  text-align: left;
  padding: 0.75rem;
  border-bottom: 2px solid var(--color-gold);
  color: var(--color-gold);
  font-weight: 700;
  white-space: nowrap;
}

.data-table td {
  padding: 0.75rem;
  border-bottom: 1px solid rgba(201, 169, 97, 0.2);
}

.data-table tbody tr:hover {
  background: rgba(224, 200, 138, 0.08);
}

.data-highlight {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--color-red);
}

@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }
}

@media (max-width: 1023px) {
  .site-header__inner {
    width: min(100% - 1.5rem, 1024px);
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.35rem);
    left: 0;
    right: 0;
    margin-left: 0;
    background: rgba(26, 24, 21, 0.97);
    border: 1px solid rgba(201, 169, 97, 0.55);
    border-top: none;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    z-index: 50;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1rem 0.75rem;
  }

  .nav-item {
    border-bottom: 1px solid rgba(201, 169, 97, 0.18);
  }

  .nav-item:last-child {
    border-bottom: 0;
  }

  .nav-link {
    display: block;
    padding: 0.85rem 0.5rem;
  }

  .nav-link::after {
    left: 0.5rem;
    right: 0.5rem;
    bottom: 0.4rem;
  }

  .site-header__actions {
    margin-left: auto;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem 1.5rem;
  }
}

@media (max-width: 640px) {
  .site-header__inner {
    width: min(100% - 1rem, 640px);
  }

  .brand__tagline {
    display: none;
  }

  .header-update__text {
    display: none;
  }

  .header-update {
    width: 2rem;
    height: 2rem;
    justify-content: center;
    padding: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .image-frame--landscape {
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 860px) and (min-width: 641px) {
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .header-update__dot::after {
    opacity: 0.6;
    animation: none;
  }
}