:root {
  --color-primary: #FF4B2B;
  --color-primary-soft: #FF7A4D;
  --color-deep: #0F1C3F;
  --color-deep-2: #09122E;
  --color-jade: #0F4C5C;
  --color-wine: #7B1E3A;
  --color-violet: #4A2F8F;
  --color-paper: #F7F3EC;
  --color-white: #FFFFFF;
  --color-ink: #1F1F1F;
  --color-muted: #9A9A9A;
  --color-gold: #D4A24E;
  --font-head: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --container: 1280px;
  --space: clamp(20px, 4vw, 40px);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background: var(--color-deep);
  color: var(--color-white);
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
}

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

ul, ol {
  list-style: none;
}

address {
  font-style: normal;
}

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

::selection {
  background: var(--color-primary);
  color: #fff;
}

.container {
  width: min(100% - var(--space), var(--container));
  margin-inline: auto;
}

.section-band {
  padding: clamp(56px, 8vw, 92px) 0;
}

.section-band--deep {
  background: var(--color-deep);
}

.section-band--jade {
  background: var(--color-jade);
}

.section-band--wine {
  background: var(--color-wine);
}

.section-band--violet {
  background: var(--color-violet);
}

.section-band--paper {
  background: var(--color-paper);
  color: var(--color-ink);
}

.section-band--paper .lead {
  color: rgba(31, 31, 31, 0.78);
}

.display-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.4rem, 6vw, 4.75rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
}

.display-title em {
  font-style: italic;
  color: var(--color-primary);
}

.section-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1.1;
}

.lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.82);
  max-width: 62ch;
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

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

.breadcrumb {
  padding: 12px 0;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-muted);
  padding: 14px 0;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  display: block;
  color: var(--color-muted);
}

.breadcrumb-link {
  color: var(--color-gold);
  transition: color 0.15s;
}

.breadcrumb-link:hover {
  color: var(--color-primary);
}

.breadcrumb-current {
  color: var(--color-paper);
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 12px 24px 11px;
  background: transparent;
  border: 1px solid currentColor;
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12), 0 8px 0 rgba(123, 30, 58, 0.4);
}

.btn-primary:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary-soft);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12), 0 8px 0 rgba(123, 30, 58, 0.55);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--color-gold);
}

.card {
  position: relative;
  background: var(--color-paper);
  color: var(--color-ink);
  border: 1px solid rgba(31, 31, 31, 0.14);
  padding: clamp(18px, 3vw, 28px);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 12px 12px 0 rgba(255, 75, 43, 0.18);
}

.card--dark {
  background: linear-gradient(145deg, #0F1C3F, #14264E);
  color: #fff;
}

.card--dark::before {
  background: linear-gradient(90deg, var(--color-gold), var(--color-primary));
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.tag--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.tag--gold {
  background: transparent;
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.exhibit-label {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-gold);
}

.exhibit-no {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-primary);
  font-size: 0.9rem;
}

.exhibit-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  min-height: 160px;
  background: linear-gradient(145deg, #0F4C5C 0%, #0F1C3F 60%, #4A2F8F 130%);
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.2);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 75, 43, 0.35) 0%, transparent 36%),
    linear-gradient(45deg, transparent 62%, rgba(212, 162, 78, 0.25) 100%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.07) 0 2px, transparent 2px 14px);
  mix-blend-mode: screen;
}

.media-frame::after {
  content: "";
  position: absolute;
  left: 12px;
  bottom: 12px;
  width: 42px;
  height: 4px;
  background: var(--color-primary);
  z-index: 2;
}

.media-frame[data-media-label]::after {
  content: attr(data-media-label);
  width: auto;
  height: auto;
  padding: 4px 10px;
  background: rgba(15, 28, 63, 0.78);
  border-left: 3px solid var(--color-primary);
  color: #fff;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  white-space: nowrap;
  max-width: calc(100% - 24px);
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.media-frame--tall {
  aspect-ratio: 3 / 4;
}

.media-frame--card {
  aspect-ratio: 4 / 3;
}

.data-ticker {
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(15, 28, 63, 0.9);
}

.ticker-track {
  display: flex;
  gap: 48px;
  width: max-content;
  padding: 12px 0;
  animation: ticker-scroll 32s linear infinite;
}

.ticker-item {
  font-family: var(--font-mono);
  color: #fff;
  white-space: nowrap;
  font-size: 0.9rem;
}

.ticker-item::before {
  content: "◆";
  color: var(--color-primary);
  margin-right: 24px;
  font-size: 0.7rem;
}

@keyframes ticker-scroll {
  to {
    transform: translateX(-50%);
  }
}

.metric {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.metric-label {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.particle-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle-field::before,
.particle-field::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gold);
  opacity: 0.4;
}

.particle-field::before {
  left: 18%;
  top: 24%;
  animation: particle-drift 7s ease-in-out infinite alternate;
}

.particle-field::after {
  right: 22%;
  top: 58%;
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  animation: particle-drift 9s ease-in-out infinite alternate-reverse;
}

@keyframes particle-drift {
  from {
    transform: translate3d(0, 0, 0) scale(0.8);
    opacity: 0.2;
  }
  to {
    transform: translate3d(22px, -18px, 0) scale(1.2);
    opacity: 0.9;
  }
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  padding: 10px 16px;
  background: var(--color-gold);
  color: var(--color-deep);
  transform: translateY(-150%);
  opacity: 0;
  transition: transform 0.2s, opacity 0.2s;
}

.skip-link:focus {
  transform: translateY(0);
  opacity: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(180deg, #0A1230 0%, #0F1C3F 72%, #0F1C3F 100%);
  border-bottom: 2px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
}

.site-header::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 0;
  bottom: -2px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-gold) 55%, transparent 92%);
  transform: skewX(-28deg);
  transform-origin: left;
  pointer-events: none;
}

.header-shell {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space);
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand-block {
  display: flex;
  align-items: center;
  min-width: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  position: relative;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-wine) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(0 0, 100% 0, 82% 100%, 0 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  right: 8px;
  bottom: 4px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
}

.brand-mark-core {
  width: 16px;
  height: 16px;
  background: var(--color-paper);
  clip-path: polygon(25% 0%, 100% 0%, 75% 100%, 0% 100%);
}

.brand-text {
  display: grid;
  gap: 1px;
}

.brand-name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.32rem;
  line-height: 1.05;
  letter-spacing: 0.03em;
  color: #fff;
}

.brand-slogan {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.34em;
  color: var(--color-gold);
  text-transform: uppercase;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 10px 12px;
  color: rgba(255, 255, 255, 0.82);
  font-weight: 700;
  font-size: 0.93rem;
  letter-spacing: 0.02em;
  transition: color 0.18s, background 0.18s;
}

.nav-list a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: calc(100% - 12px);
  bottom: 2px;
  height: 2px;
  background: var(--color-primary);
  transition: right 0.22s ease;
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after,
.nav-list a[aria-current="page"]::after {
  right: 12px;
}

.nav-list a[aria-current="page"] {
  color: #fff;
  background: rgba(255, 75, 43, 0.16);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.nav-toggle:hover {
  background: rgba(255, 75, 43, 0.24);
  border-color: var(--color-primary);
}

.nav-toggle-label {
  font-size: 0.82rem;
  letter-spacing: 0.12em;
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 20px;
  height: 14px;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s, top 0.22s, opacity 0.22s;
}

.nav-toggle-icon::before {
  top: 0;
}

.nav-toggle-icon::after {
  top: 12px;
}

.nav-toggle-icon span {
  position: absolute;
  left: 0;
  top: 6px;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s, top 0.22s, opacity 0.22s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 6px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 6px;
  transform: rotate(-45deg);
}

.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #0A1230 0%, #0F1C3F 60%, #09122E 100%);
  color: rgba(255, 255, 255, 0.78);
  border-top: 1px solid rgba(212, 162, 78, 0.28);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -30px;
  right: 6%;
  width: 70%;
  height: 90px;
  background: linear-gradient(90deg, rgba(255, 75, 43, 0.24), rgba(212, 162, 78, 0.12) 60%, transparent);
  clip-path: polygon(0 0, 100% 0, 88% 100%, 12% 100%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold) 60%, transparent);
}

.footer-shell {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px var(--space) 24px;
}

.footer-cols {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.brand-link--footer .brand-mark {
  width: 38px;
  height: 38px;
}

.brand-link--footer .brand-name {
  font-size: 1.12rem;
}

.footer-note {
  margin-top: 18px;
  max-width: 36ch;
  padding-left: 14px;
  border-left: 2px solid var(--color-gold);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.68);
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
}

.footer-heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(212, 162, 78, 0.5), transparent);
}

.footer-link-list {
  display: grid;
  gap: 8px;
}

.footer-link-list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
  transition: color 0.15s, transform 0.15s;
}

.footer-link-list a::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  transform: rotate(45deg);
  flex: none;
}

.footer-link-list a:hover {
  color: var(--color-primary);
  transform: translateX(3px);
}

.footer-links--service .footer-link-list a {
  color: rgba(255, 255, 255, 0.82);
}

.footer-links--service .footer-link-list a::before {
  background: var(--color-gold);
}

.footer-links--service .footer-link-list a:hover {
  color: var(--color-gold);
}

.footer-contact {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 16px 18px;
}

.footer-address {
  display: grid;
  gap: 8px;
  font-size: 0.86rem;
}

.footer-line {
  color: rgba(255, 255, 255, 0.7);
}

.footer-line strong {
  color: var(--color-gold);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

.footer-copy {
  margin: 0;
}

.footer-icp a {
  color: var(--color-gold);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

.footer-icp a:hover {
  border-color: var(--color-gold);
}

.footer-service-note {
  flex-basis: 100%;
  text-align: right;
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.48);
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--reveal-delay, 0s);
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 1000px) {
  .footer-cols {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-contact {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  .header-shell {
    height: auto;
    min-height: 72px;
    flex-wrap: wrap;
    padding-top: 12px;
    padding-bottom: 12px;
    row-gap: 8px;
  }

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

  .site-nav {
    order: 3;
    flex-basis: 100%;
    margin-left: 0;
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    overflow: hidden;
    transition: grid-template-rows 0.3s ease, opacity 0.2s ease;
  }

  .site-nav[data-open] {
    grid-template-rows: 1fr;
    opacity: 1;
  }

  .nav-list {
    overflow: hidden;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 0;
  }

  .nav-list a {
    display: flex;
    padding: 14px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-list a::after {
    left: 12px;
    right: calc(100% - 12px);
  }
}

@media (max-width: 620px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-contact {
    grid-column: auto;
  }

  .footer-service-note {
    text-align: left;
  }

  .site-footer .footer-shell {
    padding-top: 48px;
  }
}

@media (max-width: 420px) {
  .brand-slogan {
    font-size: 0.62rem;
    letter-spacing: 0.22em;
  }

  .brand-name {
    font-size: 1rem;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }
}

@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;
  }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

  .ticker-track {
    animation: none;
  }

  .particle-field::before,
  .particle-field::after {
    animation: none;
    opacity: 0.5;
  }
}