:root {
  --color-deep-space: #0A1A2F;
  --color-electric-purple: #7B2FBE;
  --color-neon-cyan: #00E5FF;
  --color-gold-highlight: #FFD700;
  --color-cool-white: #F5F7FA;
  --color-deep-blue-gray: #1B2A41;
  --color-light-gray-blue: #E0E6ED;
  --color-pure-white: #FFFFFF;
  --color-neutral-gray: #9AA5B1;
  --color-near-black: #0E1E2F;
  --color-danger-signal: #7A1FA0;
  --font-headline: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", "Consolas", monospace;
  --container-max: 1440px;
  --header-height: 76px;
  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 280ms cubic-bezier(0.4, 0, 0.2, 1);
  --border-thin: 1px solid rgba(0, 229, 255, 0.28);
  --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.28), 0 2px 6px rgba(0, 0, 0, 0.2);
  --shadow-float: 0 18px 40px rgba(0, 0, 0, 0.32), 0 2px 8px rgba(123, 47, 190, 0.24);
  --radius-small: 4px;
  --radius-base: 8px;
  --radius-large: 16px;
  --focus-outline: 2px solid var(--color-neon-cyan);
  --focus-offset: 3px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-deep-space);
  color: var(--color-cool-white);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-neon-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

button {
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
  border-radius: 2px;
}

::selection {
  background: var(--color-electric-purple);
  color: var(--color-pure-white);
}

body.skip-link-visible .skip-link {
  transform: translateY(0%);
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 3000;
  background: var(--color-neon-cyan);
  color: var(--color-near-black);
  font-family: var(--font-data);
  font-weight: 700;
  padding: 0.75rem 1.5rem;
  border-radius: 0 0 8px 0;
  transform: translateY(-120%);
  transition: transform var(--transition-base);
  letter-spacing: 0.06em;
  font-size: 0.875rem;
}

.skip-link:hover {
  color: var(--color-deep-space);
  background: var(--color-gold-highlight);
}

/* 顶部滚动进度条 */
.progress-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: transparent;
  z-index: 2600;
  pointer-events: none;
}

.progress-line-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-electric-purple), var(--color-neon-cyan) 60%, var(--color-gold-highlight));
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.5);
  transition: width 80ms linear;
}

/* ===== Header ===== */
.header-exhibit {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 2500;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.header-exhibit[data-scrolled="true"] {
  background: rgba(10, 26, 47, 0.94);
  border-bottom-color: rgba(123, 47, 190, 0.55);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.header-nav-shell {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-height);
  padding: 0.75rem clamp(1.25rem, 3vw, 2.5rem);
}

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

.site-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--color-near-black);
  background: linear-gradient(135deg, var(--color-neon-cyan) 0%, var(--color-electric-purple) 100%);
  border-radius: var(--radius-small);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.28);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.site-brand:hover .site-brand-mark {
  transform: rotate(-6deg) scale(1.05);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.35);
}

.site-brand-text {
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--color-pure-white);
  line-height: 1.2;
  white-space: nowrap;
}

.brand-cn {
  color: var(--color-neon-cyan);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.85em;
  border: 1px solid rgba(0, 229, 255, 0.5);
  padding: 0.05rem 0.35rem;
  border-radius: 3px;
  margin-left: 0.25rem;
  vertical-align: middle;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: var(--radius-base);
  color: var(--color-neon-cyan);
  background: rgba(10, 26, 47, 0.65);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.nav-toggle:hover {
  border-color: var(--color-gold-highlight);
  color: var(--color-gold-highlight);
  background: rgba(10, 26, 47, 0.9);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-toggle-bars {
  position: relative;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: background-color var(--transition-fast);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 2px;
  left: 0;
  background: currentColor;
  border-radius: 2px;
  transition: top var(--transition-fast), transform var(--transition-base);
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.nav-toggle-label {
  font-size: 0.75rem;
}

.nav-shell {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0.85rem;
  color: rgba(245, 247, 250, 0.82);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: var(--radius-small);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.25rem;
  height: 2px;
  background: transparent;
  border-radius: 2px;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  transform: scaleX(0);
  transform-origin: left;
}

.nav-link:hover {
  color: var(--color-pure-white);
  background-color: rgba(123, 47, 190, 0.22);
}

.nav-link:hover::after {
  background: var(--color-neon-cyan);
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--color-gold-highlight);
  font-weight: 700;
}

.nav-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 50%;
  width: 3px;
  height: 70%;
  background: var(--color-electric-purple);
  border-radius: 3px;
  transform: translateY(-50%);
  box-shadow: 0 0 8px rgba(123, 47, 190, 0.7);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  background: linear-gradient(135deg, var(--color-electric-purple), #5D1D9E);
  color: var(--color-pure-white);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius-base);
  border: 1px solid rgba(0, 229, 255, 0.35);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.nav-cta::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-neon-cyan);
  border-radius: 50%;
  animation: pulse 2.4s ease-in-out infinite;
}

.nav-cta:hover {
  color: var(--color-pure-white);
  border-color: var(--color-gold-highlight);
  box-shadow: 0 0 20px rgba(123, 47, 190, 0.5), 0 0 34px rgba(0, 229, 255, 0.14);
  transform: translateY(-2px);
}

/* ===== Footer ===== */
.footer-exhibit {
  background: radial-gradient(circle at 80% 30%, rgba(123, 47, 190, 0.14) 0%, rgba(10, 26, 47, 0) 42%), var(--color-deep-space);
  border-top: 1px solid rgba(0, 229, 255, 0.35);
  position: relative;
  margin-top: 4rem;
}

.footer-exhibit::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 40%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-neon-cyan), var(--color-electric-purple), var(--color-gold-highlight));
}

.footer-admissions {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr 0.9fr 1.25fr;
  gap: 2.5rem;
  padding: 3.25rem clamp(1.25rem, 3vw, 2.5rem) 2.75rem;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
}

.footer-column-brand {
  border-right: 1px solid rgba(0, 229, 255, 0.15);
  padding-right: 1.5rem;
}

.footer-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1.0625rem;
  letter-spacing: 0.05em;
  color: var(--color-pure-white);
  border-bottom: 1px solid rgba(123, 47, 190, 0.55);
  padding-bottom: 0.65rem;
  margin-bottom: 0.25rem;
}

.footer-label-index {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-gold-highlight);
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.3);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  letter-spacing: 0.03em;
}

.footer-about {
  font-size: 0.9375rem;
  color: rgba(245, 247, 250, 0.66);
  line-height: 1.85;
}

.footer-contact-list,
.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-contact-list li,
.footer-link-list li {
  font-size: 0.9375rem;
  line-height: 1.65;
}

.footer-contact-list {
  color: rgba(245, 247, 250, 0.62);
}

.footer-contact-list li:first-child {
  font-family: var(--font-data);
  font-size: 0.875rem;
}

.footer-link {
  position: relative;
  display: inline-block;
  color: rgba(245, 247, 250, 0.72);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 1px;
  width: 100%;
  background: var(--color-neon-cyan);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.footer-link:hover {
  color: var(--color-gold-highlight);
  transform: translateX(4px);
}

.footer-link:hover::after {
  transform: scaleX(1);
}

.footer-trust {
  font-size: 0.8125rem;
  color: rgba(154, 165, 177, 0.75);
  border-left: 2px solid var(--color-electric-purple);
  padding-left: 0.8rem;
  margin-top: 0.35rem;
  line-height: 1.8;
  opacity: 0.85;
}

.footer-meta-row {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid rgba(0, 229, 255, 0.14);
  padding: 1.25rem clamp(1.25rem, 3vw, 2.5rem);
}

.footer-meta-copyright {
  color: rgba(154, 165, 177, 0.6);
  font-size: 0.8125rem;
  font-family: var(--font-data);
}

.footer-meta-icp {
  color: rgba(154, 165, 177, 0.7);
  font-size: 0.8125rem;
  font-family: var(--font-data);
}

/* ===== 通用组件：展签、卡片、分割线、面包屑 ===== */
.data-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-gold-highlight);
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.28);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  white-space: nowrap;
}

.data-tag::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--color-gold-highlight);
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(255, 215, 0, 0.7);
}

.exhibit-card {
  position: relative;
  background: var(--color-deep-blue-gray);
  border: var(--border-thin);
  border-radius: var(--radius-large);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.exhibit-card::after {
  content: attr(data-exhibit-label);
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(0, 229, 255, 0.6);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  background: rgba(10, 26, 47, 0.45);
}

.exhibit-card:hover {
  transform: translateY(-4px);
  border-color: rgba(123, 47, 190, 0.7);
  box-shadow: var(--shadow-float);
}

.plate-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2.5rem 0;
  color: rgba(0, 229, 255, 0.35);
}

.plate-divider::before {
  content: "";
  flex: 0 0 1.75rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-electric-purple), var(--color-neon-cyan));
  border-radius: 2px;
}

.plate-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.32), rgba(123, 47, 190, 0.12) 70%, transparent);
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 2rem;
  font-family: var(--font-data);
  color: rgba(154, 165, 177, 0.8);
}

.breadcrumb-nav a {
  color: rgba(0, 229, 255, 0.75);
}

.breadcrumb-nav a:hover {
  color: var(--color-gold-highlight);
}

.breadcrumb-nav [aria-current="page"] {
  color: var(--color-gold-highlight);
  font-weight: 700;
}

.breadcrumb-nav .breadcrumb-sep {
  color: rgba(123, 47, 190, 0.8);
  margin: 0 0.15rem;
}

/* ===== 正文容器与内容网格 ===== */
.content-container {
  max-width: calc(var(--container-max) - 2rem);
  margin: 0 auto;
  padding: 2.5rem clamp(1.25rem, 3vw, 2.5rem);
  position: relative;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
  gap: 2.25rem;
  align-items: start;
}

.content-main {
  min-width: 0;
}

.content-aside {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.content-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-neon-cyan), var(--color-electric-purple) 46%, transparent 78%);
  opacity: 0.8;
}

/* 图片容器基础规则 */
.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-base);
  border: 1px solid rgba(0, 229, 255, 0.22);
  background: var(--color-deep-blue-gray);
  aspect-ratio: 16 / 9;
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(123, 47, 190, 0.18), rgba(10, 26, 47, 0.65));
  z-index: 1;
  pointer-events: none;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
  transition: transform var(--transition-base), filter var(--transition-base);
}

.image-frame:hover img {
  transform: scale(1.02);
  filter: saturate(1.1) contrast(1.1);
}

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

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

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

/* 按钮体系 */
.site-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  border-radius: var(--radius-base);
  border: 1px solid rgba(0, 229, 255, 0.4);
  background: rgba(123, 47, 190, 0.18);
  color: var(--color-neon-cyan);
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base), transform var(--transition-fast);
}

.site-button:hover {
  background: var(--color-electric-purple);
  border-color: var(--color-neon-cyan);
  color: var(--color-pure-white);
  transform: translateY(-2px);
}

.site-button-gold {
  border-color: rgba(255, 215, 0, 0.42);
  background: rgba(255, 215, 0, 0.08);
  color: var(--color-gold-highlight);
}

.site-button-gold:hover {
  background: rgba(255, 215, 0, 0.18);
  border-color: var(--color-gold-highlight);
  color: var(--color-pure-white);
}

.site-button-ghost {
  background: transparent;
  border-color: rgba(245, 247, 250, 0.26);
  color: var(--color-cool-white);
}

.site-button-ghost:hover {
  background: rgba(245, 247, 250, 0.1);
  border-color: var(--color-cool-white);
  color: var(--color-pure-white);
}

/* 返回顶部 */
.to-top-button {
  position: fixed;
  right: 1.75rem;
  bottom: 1.75rem;
  z-index: 2200;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(10, 26, 47, 0.88);
  border: 1px solid rgba(0, 229, 255, 0.5);
  color: var(--color-neon-cyan);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast);
}

.to-top-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.to-top-button[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.to-top-button:hover {
  background: var(--color-electric-purple);
  border-color: var(--color-gold-highlight);
  color: var(--color-gold-highlight);
}

/* ===== 响应式 ===== */
@media (max-width: 1100px) {
  .footer-admissions {
    grid-template-columns: 1fr 1fr;
    gap: 2rem 1.5rem;
  }

  .footer-column-brand {
    border-right: none;
    padding-right: 0;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }

  .content-aside {
    position: static;
  }
}

@media (max-width: 860px) {
  :root {
    --header-height: 68px;
  }

  .header-exhibit {
    background: rgba(10, 26, 47, 0.9);
    border-bottom-color: rgba(123, 47, 190, 0.45);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-shell {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    height: 100vh;
    width: min(84vw, 340px);
    background: rgba(10, 26, 47, 0.98);
    border-left: 1px solid rgba(0, 229, 255, 0.3);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 1.5rem;
    padding: calc(var(--header-height) + 1rem) 1.75rem 2rem;
    transform: translateX(105%);
    transition: transform var(--transition-base);
    z-index: 2400;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.4);
  }

  .nav-shell[data-open="true"] {
    transform: translateX(0);
  }

  .site-nav {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 0.35rem;
  }

  .nav-link {
    font-size: 1.0625rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(123, 47, 190, 0.25);
    border-radius: 0;
  }

  .nav-link[aria-current="page"]::before {
    left: 0;
    height: 60%;
  }

  .nav-cta {
    width: 100%;
    justify-content: center;
    margin-top: 0.25rem;
    padding: 0.75rem 1rem;
  }

  .header-nav-shell {
    min-height: var(--header-height);
  }

  .site-brand-text {
    font-size: 1.125rem;
  }

  .content-container {
    padding-top: calc(var(--header-height) + 1.5rem);
  }
}

@media (max-width: 640px) {
  .footer-admissions {
    grid-template-columns: 1fr;
  }

  .footer-column-brand {
    border-bottom: 1px solid rgba(0, 229, 255, 0.14);
    padding-bottom: 1.5rem;
  }

  .footer-meta-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .to-top-button {
    right: 1rem;
    bottom: 1rem;
    width: 42px;
    height: 42px;
  }
}

/* ===== 动效偏好 ===== */
@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.55);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(0, 229, 255, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .nav-shell {
    transition: none;
  }

  .nav-cta::before {
    animation: none;
  }

  .exhibit-card:hover {
    transform: none;
  }
}