:root {
  --bg: #efe4d1;
  --panel: rgba(255, 255, 255, 0.96);
  --panel-strong: rgba(255, 255, 255, 0.98);
  --line: rgba(151, 112, 66, 0.22);
  --text: #2f2116;
  --muted: #6d5d4f;
  --active-accent: #a56f3c;
  --active-soft: #bf8a4d;
  --active-glow: rgba(214, 180, 106, 0.18);
  --shadow: 0 18px 40px rgba(123, 95, 54, 0.12);
  --radius: 28px;
  --content-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: Georgia, "Times New Roman", "Songti SC", "STSong", serif;
  background:
    radial-gradient(circle at top left, var(--active-glow), transparent 22rem),
    radial-gradient(circle at top right, rgba(214, 193, 156, 0.16), transparent 20rem),
    linear-gradient(180deg, #f5ecdc 0%, #ece0cd 100%);
  min-height: 100vh;
}

body.detail-open {
  overflow: hidden;
}

img {
  display: block;
  width: 100%;
}

button {
  font: inherit;
}

.site-shell {
  width: min(calc(100% - 32px), var(--content-width));
  margin: 0 auto;
  padding: 28px 0 60px;
}

.hero,
.section-block,
.status-bar,
.detail-sheet,
.noscript-panel {
  backdrop-filter: blur(18px);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero {
  border-radius: 36px;
  padding: 28px;
  display: grid;
  gap: 24px;
  background:
    linear-gradient(135deg, rgba(255, 249, 241, 0.98), rgba(244, 232, 214, 0.94)),
    var(--panel);
}

.eyebrow,
.section-kicker,
.civilization-card-kicker,
.exhibit-card-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--active-soft);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.8rem);
  line-height: 0.95;
  max-width: 9ch;
}

.hero-text,
.section-head p,
.civilization-card-text,
.exhibit-card-summary,
.civilization-banner p,
.detail-summary,
.noscript-panel p {
  color: var(--muted);
  line-height: 1.75;
}

.hero-panel {
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(166, 128, 80, 0.14);
  padding: 20px;
}

.hero-panel-label {
  margin: 0 0 12px;
  color: var(--active-soft);
}

.hero-facts {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.app-shell {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.status-bar {
  border-radius: 999px;
  padding: 14px 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  color: var(--muted);
}

.status-bar span:first-child {
  color: var(--text);
}

.status-back {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(165, 111, 60, 0.12);
  color: var(--text);
  cursor: pointer;
}

.section-block {
  border-radius: 30px;
  padding: 24px;
}

.section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 20px;
}

.section-head h2,
.civilization-banner h2,
.detail-copy h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.civilization-grid,
.gallery-grid {
  display: grid;
  gap: 18px;
}

.civilization-card,
.exhibit-card {
  display: grid;
  grid-template-columns: minmax(108px, 34%) minmax(0, 1fr);
  min-height: 104px;
  border: 1px solid rgba(166, 128, 80, 0.14);
  background: rgba(255, 255, 255, 0.76);
  border-radius: 24px;
  padding: 0;
  overflow: hidden;
  color: inherit;
  cursor: pointer;
  text-align: left;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.civilization-card:hover,
.civilization-card:focus-visible,
.exhibit-card:hover,
.exhibit-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--active-soft);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.28);
  outline: none;
}

.civilization-card img,
.exhibit-card img {
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.civilization-card-body,
.exhibit-card-copy {
  display: grid;
  gap: 6px;
  padding: 12px 14px;
  align-content: center;
}

.civilization-card-title,
.exhibit-card-title {
  font-size: 1.06rem;
}

.exhibit-card-order {
  color: var(--active-soft);
  font-size: 0.78rem;
}

.civilization-card-text,
.exhibit-card-summary {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 0.9rem;
  line-height: 1.45;
}

.civilization-stage {
  background:
    radial-gradient(circle at top right, var(--theme-glow), transparent 24rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.58), rgba(255, 252, 247, 0.72)),
    var(--panel-strong);
}

.civilization-banner {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}

.civilization-intro {
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(166, 128, 80, 0.14);
  padding: 16px 18px;
}

.civilization-intro summary {
  cursor: pointer;
  color: var(--theme-soft);
  font-weight: 700;
}

.civilization-intro-copy {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.civilization-meta {
  display: grid;
  gap: 12px;
}

.civilization-meta span {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.civilization-meta strong {
  color: var(--theme-soft);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.detail-dialog {
  border: 0;
  padding: 0;
  background: transparent;
  width: min(1120px, calc(100% - 24px));
}

.detail-dialog::backdrop {
  background: rgba(87, 63, 35, 0.28);
  backdrop-filter: blur(10px);
}

.detail-sheet {
  position: relative;
  border-radius: 30px;
  overflow: hidden;
  display: block;
  background: #fffdfa;
}

.detail-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(166, 128, 80, 0.18);
  background: rgba(255, 250, 243, 0.9);
  color: var(--text);
  cursor: pointer;
  z-index: 2;
}

#detail-content {
  display: grid;
}

#detail-content {
  grid-template-columns: 1fr;
}

.detail-media img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.detail-copy {
  padding: 22px 22px 26px;
  display: grid;
  gap: 16px;
  color: var(--text);
}

.mobile-toolbar {
  margin-bottom: 18px;
}

.search-field {
  display: grid;
  gap: 8px;
}

.search-field span {
  color: var(--theme-soft);
  font-size: 0.88rem;
}

.search-field input {
  width: 100%;
  border: 1px solid rgba(166, 128, 80, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.86);
  color: var(--text);
  padding: 14px 16px;
  font: inherit;
}

.detail-summary {
  color: #4d3b2b;
  font-size: 1.05rem;
}

.detail-topbar {
  display: block;
}

.detail-back {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(165, 111, 60, 0.12);
  color: var(--text);
  cursor: pointer;
}

.detail-position {
  margin: 0;
  color: var(--active-soft);
  font-size: 0.9rem;
}

.detail-section {
  display: grid;
  gap: 10px;
}

.detail-section h3 {
  margin: 0;
  color: var(--active-soft);
  font-size: 1rem;
}

.detail-body {
  display: grid;
  gap: 14px;
}

.detail-body p {
  margin: 0;
  color: #3f3023;
  line-height: 1.85;
}

.detail-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
  color: #4c3c2d;
  line-height: 1.75;
}

.detail-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.detail-actions button {
  border: 0;
  min-height: 46px;
  padding: 10px 8px;
  border-radius: 16px;
  background: var(--active-accent);
  color: #fffdf8;
  cursor: pointer;
}

.section-actions {
  display: flex;
  justify-content: center;
  margin-top: 22px;
}

.section-back-button {
  border: 0;
  border-radius: 999px;
  padding: 13px 24px;
  background: var(--active-accent);
  color: #fffdf8;
  cursor: pointer;
}

.detail-actions button[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.noscript-panel {
  width: min(calc(100% - 32px), 760px);
  margin: 24px auto 0;
  border-radius: 24px;
  padding: 24px;
}

@media (min-width: 760px) {
  .hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
    align-items: end;
  }

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

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

  .civilization-banner {
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.7fr);
  }

  .detail-sheet {
    width: min(760px, calc(100vw - 40px));
    margin: 0 auto;
  }
}

@media (max-width: 759px) {
  .site-shell {
    width: min(calc(100% - 18px), var(--content-width));
    padding-top: 14px;
    padding-bottom: 34px;
  }

  .hero {
    padding: 18px;
    gap: 16px;
  }

  .hero-panel {
    padding: 16px;
  }

  .section-block-home {
    display: block;
  }

  .status-bar {
    position: sticky;
    top: 8px;
    z-index: 3;
    border-radius: 22px;
    padding: 12px 14px;
  }

  .section-block,
  .detail-copy {
    padding: 18px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .civilization-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .exhibit-card-copy {
    gap: 5px;
    padding: 12px 13px;
  }

  .exhibit-card-title {
    font-size: 1rem;
  }

  .civilization-card,
  .exhibit-card {
    grid-template-columns: minmax(108px, 34%) minmax(0, 1fr);
    min-height: 96px;
  }

  .detail-dialog {
    width: 100%;
    max-width: none;
    margin: 0;
  }

  .detail-sheet {
    min-height: 100vh;
    border-radius: 0;
    background: rgba(251, 246, 238, 0.98);
  }

  .detail-close {
    top: 10px;
    right: 10px;
  }

  #detail-content {
    grid-template-columns: 1fr;
  }

  .detail-media img {
    aspect-ratio: 16 / 11;
  }

  .detail-copy {
    gap: 16px;
  }

  .detail-topbar {
    margin-bottom: 2px;
  }

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

  .detail-actions button {
    min-height: 48px;
    padding: 10px 8px;
    font-size: 0.96rem;
  }
}

@media (min-width: 1080px) {
  .civilization-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .section-head {
    grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
    align-items: end;
  }
}