:root {
  color-scheme: light;
  --paper: #f3efe5;
  --paper-deep: #e9e1d1;
  --surface: #fbf9f3;
  --ink: #202722;
  --muted: #6c716b;
  --line: #d8cfbd;
  --red: #8f2d27;
  --red-dark: #6f211d;
  --gold: #a78145;
  --green: #34473d;
  --shadow: 0 18px 50px rgba(51, 42, 29, .12);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% -10%, rgba(167, 129, 69, .18), transparent 28rem),
    var(--paper);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "Microsoft YaHei", serif;
  line-height: 1.65;
  overscroll-behavior-x: none;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
img { display: block; max-width: 100%; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 8px 12px;
  transform: translateY(-150%);
  color: #fff;
  background: var(--red);
  border-radius: 8px;
}
.skip-link:focus { transform: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 20px;
}
.brand {
  display: inline-flex;
  gap: 11px;
  align-items: center;
  text-decoration: none;
  line-height: 1.15;
}
.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #f9eed8;
  background: var(--red);
  border-radius: 50% 50% 44% 46%;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.25);
  font-size: 21px;
  font-weight: 800;
}
.brand strong, .brand small { display: block; }
.brand strong { letter-spacing: .12em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 11px; letter-spacing: .28em; }
.admin-link {
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
  text-decoration: none;
}
.admin-link:hover { color: var(--red); }

.catalog-intro {
  position: relative;
  max-width: 1000px;
  margin: 24px auto 0;
  padding: 54px 20px 62px;
  text-align: center;
}
.catalog-intro::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 18px 30% auto;
  height: 210px;
  background: radial-gradient(ellipse, rgba(143,45,39,.09), transparent 68%);
}
.eyebrow {
  color: var(--red);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
}
h1 {
  margin: 15px 0 16px;
  font-size: clamp(34px, 8vw, 66px);
  font-weight: 800;
  letter-spacing: -.04em;
  line-height: 1.2;
}
.catalog-intro > p {
  max-width: 650px;
  margin: 0 auto;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 15px;
}
.search-box {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  gap: 10px;
  align-items: center;
  max-width: 720px;
  margin: 30px auto 0;
  padding: 7px 7px 7px 17px;
  background: rgba(251,249,243,.92);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.search-box:focus-within { outline: 3px solid rgba(143,45,39,.13); border-color: var(--red); }
.search-box svg { width: 21px; fill: none; stroke: var(--muted); stroke-linecap: round; stroke-width: 1.8; }
.search-box input {
  width: 100%;
  min-width: 0;
  padding: 10px 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: 0;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 15px;
}
.search-box button, .load-more {
  padding: 11px 19px;
  color: #fff;
  background: var(--red);
  border: 0;
  border-radius: 11px;
  cursor: pointer;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 14px;
  font-weight: 700;
}
.search-box button:hover, .load-more:hover { background: var(--red-dark); }
.quick-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  justify-content: center;
  margin-top: 23px;
  color: var(--muted);
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 12px;
}
.quick-stats strong { color: var(--ink); font-size: 16px; }

.catalog-section {
  max-width: 1240px;
  margin: 0 auto;
  padding: 34px 20px 80px;
}
.section-head { display: flex; flex-direction: column; gap: 20px; margin-bottom: 16px; }
.section-head h2 { margin: 3px 0 0; font-size: 31px; line-height: 1.2; }
.filter-tabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 3px; }
.filter-tabs button {
  flex: 0 0 auto;
  padding: 8px 14px;
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-family: "Microsoft YaHei", sans-serif;
  font-size: 13px;
}
.filter-tabs button:hover { color: var(--ink); background: rgba(255,255,255,.45); }
.filter-tabs button.active { color: var(--red); background: var(--surface); border-color: var(--line); }
.result-note { min-height: 28px; margin-bottom: 12px; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13px; }
.catalog-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.card {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid rgba(201,188,164,.75);
  border-radius: var(--radius);
  box-shadow: 0 7px 22px rgba(52,44,32,.06);
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 18px 38px rgba(52,44,32,.13); }
.card-button { display: block; width: 100%; padding: 0; color: inherit; background: none; border: 0; cursor: pointer; text-align: left; }
.card-cover {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(143,45,39,.28), transparent 48%),
    radial-gradient(circle at 70% 30%, rgba(167,129,69,.5), transparent 24%),
    var(--green);
}
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.card:hover .card-cover img { transform: scale(1.025); }
.cover-fallback { display: grid; height: 100%; place-items: center; color: rgba(255,255,255,.82); font-size: 68px; font-weight: 800; }
.resource-badge { position: absolute; right: 12px; bottom: 12px; padding: 5px 9px; color: #fff; background: rgba(24,31,27,.78); border-radius: 999px; font-family: "Microsoft YaHei", sans-serif; font-size: 11px; backdrop-filter: blur(8px); }
.card-body { padding: 17px 17px 19px; }
.accession { color: var(--red); font-family: "Microsoft YaHei", sans-serif; font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.card h3 { margin: 6px 0 7px; font-size: 19px; line-height: 1.45; }
.card p { display: -webkit-box; overflow: hidden; margin: 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 13px; line-height: 1.65; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.load-more { display: block; margin: 30px auto 0; padding-inline: 30px; }
.load-more[hidden] { display: none; }
.empty-state { grid-column: 1 / -1; padding: 70px 20px; text-align: center; color: var(--muted); background: rgba(255,255,255,.3); border: 1px dashed var(--line); border-radius: var(--radius); }

.skeleton-card { padding-bottom: 22px; }
.skeleton-card div, .skeleton-card span { display: block; background: linear-gradient(100deg, #e2dacb 20%, #eee8dc 40%, #e2dacb 60%); background-size: 200% 100%; animation: shimmer 1.4s infinite; }
.skeleton-card div { aspect-ratio: 4 / 3; }
.skeleton-card span { height: 16px; margin: 18px 18px 0; border-radius: 5px; }
.skeleton-card span:last-child { width: 64%; margin-top: 9px; }
@keyframes shimmer { to { background-position-x: -200%; } }

footer { padding: 30px 20px 48px; color: var(--muted); border-top: 1px solid var(--line); text-align: center; font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
footer p { margin: 4px; }

.detail-dialog {
  width: min(960px, calc(100% - 24px));
  max-height: calc(100dvh - 24px);
  padding: 0;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 30px 90px rgba(25,24,20,.3);
}
.detail-dialog::backdrop { background: rgba(24,28,25,.67); backdrop-filter: blur(4px); }
.dialog-close { position: sticky; z-index: 5; top: 12px; float: right; width: 40px; height: 40px; margin: 12px 12px -52px 0; color: var(--ink); background: rgba(251,249,243,.9); border: 1px solid var(--line); border-radius: 50%; cursor: pointer; font-size: 25px; line-height: 1; }
.detail-layout { display: grid; }
.detail-media { min-height: 280px; background: var(--paper); }
.detail-photo { min-height: 280px; }
.detail-media img { width: 100%; height: min(55vh, 520px); object-fit: contain; background: #e5e8e3; }
.model-panel { padding: 18px; background: #e6ede7; color: var(--ink); }
.model-panel-head { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.model-panel-head h3 { margin: 3px 0 0; font-size: 19px; }
.model-panel-head small { color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 10px; }
.model-viewer { position: relative; min-height: 330px; overflow: hidden; background: radial-gradient(circle at 50% 35%, #ffffff, #dfe9e1 72%); border: 1px solid #c3d0c6; border-radius: 12px; touch-action: none; }
.model-viewer canvas { display: block; width: 100%; height: 100%; }
.model-viewer.is-windowed { position: fixed; z-index: 1000; inset: 0; width: 100vw; height: 100dvh; min-height: 0; border: 0; border-radius: 0; }
.model-window-toggle { position: absolute; z-index: 2; top: 12px; right: 12px; display: grid; width: 44px; height: 44px; place-items: center; padding: 0; color: var(--ink); background: rgba(255,255,255,.9); border: 1px solid #c3d0c6; border-radius: 10px; cursor: pointer; font-family: Arial, sans-serif; font-size: 22px; line-height: 1; }
.model-window-toggle:hover, .model-window-toggle:focus-visible { background: #fff; outline: 3px solid rgba(143,45,39,.16); }
.model-viewer-windowed { overflow: hidden; }
.model-viewer-status { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.model-viewer-error { padding: 18px; color: var(--red); font-family: "Microsoft YaHei", sans-serif; font-size: 12px; }
.detail-fallback { display: grid; min-height: 320px; place-items: center; color: rgba(255,255,255,.82); font-size: 92px; }
.detail-copy { padding: 28px 23px 34px; }
.detail-copy h2 { margin: 8px 0 15px; font-size: clamp(25px, 7vw, 39px); line-height: 1.35; }
.detail-summary { color: #414843; font-family: "Microsoft YaHei", sans-serif; font-size: 14px; }
.meta-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 25px 0; padding: 18px 0; border-block: 1px solid var(--line); }
.meta-grid div { display: grid; gap: 2px; }
.meta-grid dt { color: var(--muted); font-family: "Microsoft YaHei", sans-serif; font-size: 11px; }
.meta-grid dd { margin: 0; font-family: "Microsoft YaHei", sans-serif; font-size: 13px; }
.asset-list { margin-top: 16px; border-top: 1px solid var(--line); }
.asset-list summary { padding: 14px 0 10px; cursor: pointer; font-size: 16px; font-weight: 700; list-style-position: inside; }
.asset-list summary::marker { color: var(--red); }
.asset-list ul { display: grid; gap: 7px; padding: 0; list-style: none; }
.asset-list a { display: flex; gap: 12px; align-items: center; justify-content: space-between; padding: 10px 12px; color: var(--ink); background: var(--paper); border-radius: 9px; font-family: "Microsoft YaHei", sans-serif; font-size: 12px; text-decoration: none; }
.asset-list a:hover { color: var(--red); }
.asset-list small { color: var(--muted); white-space: nowrap; }
.toast { position: fixed; z-index: 200; right: 18px; bottom: 18px; max-width: min(360px, calc(100% - 36px)); padding: 12px 16px; color: #fff; background: #29322d; border-radius: 10px; opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s ease; font-family: "Microsoft YaHei", sans-serif; font-size: 13px; }
.toast.visible { opacity: 1; transform: none; }

@media (min-width: 620px) {
  .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-head { flex-direction: row; align-items: end; justify-content: space-between; }
  .meta-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 619px) {
  .detail-dialog { width: calc(100% - 12px); max-height: calc(100dvh - 12px); border-radius: 14px; }
  .dialog-close { width: 44px; height: 44px; margin: 8px 8px -52px 0; }
  .detail-media, .detail-photo { min-height: 220px; }
  .model-panel { padding: 12px; }
  .model-panel-head { align-items: flex-start; flex-direction: column; gap: 2px; }
  .model-panel-head small { font-size: 11px; line-height: 1.5; }
  .model-viewer { min-height: min(58dvh, 440px); }
  .model-window-toggle { top: max(10px, env(safe-area-inset-top)); right: max(10px, env(safe-area-inset-right)); }
  .model-viewer.is-windowed { padding-top: env(safe-area-inset-top); padding-right: env(safe-area-inset-right); padding-bottom: env(safe-area-inset-bottom); padding-left: env(safe-area-inset-left); }
  .asset-list summary { min-height: 44px; display: flex; align-items: center; }
  .asset-list a { min-height: 44px; }
}

@media (min-width: 960px) {
  .site-header { padding-inline: 28px; }
  .catalog-intro { padding-top: 68px; }
  .catalog-section { padding-inline: 28px; }
  .catalog-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 23px; }
  .detail-layout { grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr); }
  .detail-media { position: sticky; top: 0; height: 100%; min-height: 660px; }
  .detail-media img { height: min(50vh, 480px); }
  .detail-copy { padding: 54px 42px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}