:root {
  --color-primary: #0a192f;
  --color-primary-2: #1f3a5f;
  --color-accent: #ff6b35;
  --color-bg: #f5f7fa;
  --color-white: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #546e7a;
  --color-muted: #78909c;
  --color-border: #d0d7e2;
  --color-updated: #2e7d32;
  --color-live: #e53935;
  --header-w: 280px;
  --header-h-mobile: 64px;
  --container-max: 1440px;
  --font-head: Oswald, Impact, "Arial Narrow", sans-serif;
  --font-body: Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --shadow-soft: 0 12px 30px rgba(10, 25, 47, 0.08);
  --shadow-lift: 0 20px 45px rgba(10, 25, 47, 0.16);
  --radius: 2px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  margin-left: var(--header-w);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.1;
  color: var(--color-primary);
}

a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

button, input, select, textarea {
  font: inherit;
}

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

ul, ol {
  margin-top: 0;
}

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

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

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 2100;
  padding: 10px 14px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-family: var(--font-head);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  transform: translateY(-160%);
}

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

#main-content {
  display: block;
  min-height: 70vh;
}

#main-content:focus {
  outline: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--header-w);
  height: 100vh;
  z-index: 1000;
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  isolation: isolate;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 10px);
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  z-index: 2;
  width: 5px;
  height: 38%;
  background: var(--color-accent);
  pointer-events: none;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: clamp(20px, 3vw, 30px) 18px 20px 22px;
  overflow-y: auto;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--color-white);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  background: var(--color-accent);
  color: var(--color-primary);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% 74%, 74% 100%, 0 100%);
  transition: background-color 0.15s, color 0.15s;
}

.site-brand:hover .brand-mark {
  background: var(--color-white);
  color: var(--color-accent);
}

.brand-text strong {
  display: block;
  font-family: var(--font-head);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-transform: uppercase;
  color: var(--color-white);
}

.brand-text small {
  display: block;
  margin-top: 2px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.58);
}

.nav-toggle {
  display: none;
}

.site-nav {
  display: flex;
  flex-direction: column;
  flex: 1 0 auto;
  min-height: 0;
  margin-top: clamp(24px, 5vh, 44px);
}

.site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.site-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 10px;
  border-left: 2px solid transparent;
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 0.15s, background-color 0.15s, border-color 0.15s, padding-left 0.15s;
}

.site-nav__link::after {
  content: attr(data-index);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-accent);
  opacity: 0.6;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-white);
  background: rgba(255, 107, 53, 0.12);
  border-left-color: var(--color-accent);
  padding-left: 16px;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-white);
  border-left-color: var(--color-accent);
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.18), transparent);
}

.header-meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  gap: 8px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.78);
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.status-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-updated);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.2);
}

.header-meta__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  border-top: 4px solid var(--color-accent);
}

.site-footer__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px clamp(20px, 4vw, 64px) 28px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: clamp(24px, 5vw, 64px);
}

.site-footer__intro {
  max-width: 52ch;
}

.site-footer__brand {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.6rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-white);
}

.site-footer__slogan {
  margin: 4px 0 12px;
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-footer__trust {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__heading {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.95);
}

.site-footer__links,
.site-footer__contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.site-footer__links a {
  display: inline-block;
  padding: 4px 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s, padding-left 0.15s;
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  color: var(--color-white);
  border-bottom-color: var(--color-accent);
  padding-left: 4px;
}

.site-footer__links a[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.site-footer__contact-list li {
  display: grid;
  grid-template-columns: 3.5em 1fr;
  gap: 10px;
  font-size: 0.87rem;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__contact-list li span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__bottom p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 64px);
}

.content-section {
  padding-block: clamp(40px, 7vw, 96px);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.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));
}

.page-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-primary);
  text-wrap: balance;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-tag::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-accent);
}

.dateline {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
}

.dateline li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dateline li:not(:last-child)::after {
  content: "/";
  color: var(--color-border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-size: 0.82rem;
  color: var(--color-muted);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--color-border);
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-border);
}

.card__body {
  padding: 20px;
}

.card__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.data-table th {
  padding: 10px 12px;
  border-bottom: 2px solid var(--color-primary);
  background: var(--color-bg);
  text-align: left;
  font-family: var(--font-head);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  font-variant-numeric: tabular-nums;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
}

.stat-item {
  background: var(--color-white);
  padding: 18px 16px;
}

.stat-item__label {
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.stat-item__value {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.data-value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.data-value--accent {
  color: var(--color-accent);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--color-primary);
  overflow-x: auto;
}

.tab-button {
  appearance: none;
  border: 1px solid var(--color-border);
  border-bottom: 0;
  background: transparent;
  color: var(--color-text-secondary);
  padding: 10px 16px;
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, background-color 0.15s, border-color 0.15s;
}

.tab-button:hover {
  color: var(--color-accent);
}

.tab-button.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.tab-panel {
  padding: 20px 0;
}

.tab-panel.is-active {
  animation: tab-in 0.18s ease-out;
}

@keyframes tab-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background-color: var(--color-primary);
  background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.08) 50%, rgba(255, 255, 255, 0.08) 75%, transparent 75%, transparent);
  background-size: 10px 10px;
}

.media-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

.media-frame--square {
  aspect-ratio: 1 / 1;
}

.callout {
  position: relative;
  padding: 18px 20px;
  background: var(--color-primary);
  border-left: 4px solid var(--color-accent);
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.92rem;
}

.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--color-primary);
  border-left: 3px solid var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.exhibit-label::before {
  content: "//";
  color: var(--color-accent);
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  background: rgba(229, 57, 53, 0.12);
  border: 1px solid rgba(229, 57, 53, 0.3);
  color: var(--color-live);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.live-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-live);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.btn:hover,
.btn:focus-visible {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-lift);
}

.btn--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

.btn--accent:hover,
.btn--accent:focus-visible {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: none;
}

.prose {
  max-width: 72ch;
}

.prose p {
  margin: 0 0 1.2em;
}

.prose h2 {
  margin: 2em 0 0.6em;
  font-size: 1.6rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.prose h3 {
  margin: 1.6em 0 0.5em;
  font-size: 1.2rem;
  text-transform: uppercase;
  color: var(--color-primary);
}

.prose a {
  color: var(--color-accent);
}

.prose ul,
.prose ol {
  margin-bottom: 1.2em;
  padding-left: 1.2em;
}

.prose li {
  margin-bottom: 0.5em;
}

.prose blockquote {
  margin: 0 0 1.2em;
  padding-left: 1em;
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-secondary);
}

@media (max-width: 920px) {
  body {
    margin-left: 0;
    padding-top: var(--header-h-mobile);
  }

  .site-header {
    width: 100%;
    height: var(--header-h-mobile);
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-header::after {
    height: 24%;
  }

  .site-header__inner {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    height: var(--header-h-mobile);
    padding: 0 14px;
    overflow: visible;
  }

  .site-brand {
    flex: 1;
    min-width: 0;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
    padding: 8px 10px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: transparent;
    color: var(--color-white);
    font-family: var(--font-head);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
  }

  .nav-toggle__line {
    position: relative;
    display: block;
    width: 18px;
    height: 2px;
    background: currentColor;
    transition: background-color 0.15s;
  }

  .nav-toggle__line::before,
  .nav-toggle__line::after {
    content: "";
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: currentColor;
    transition: transform 0.15s;
  }

  .nav-toggle__line::before {
    top: -6px;
  }

  .nav-toggle__line::after {
    top: 6px;
  }

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

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

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

  .site-nav {
    display: none;
    flex-direction: column;
    position: fixed;
    top: var(--header-h-mobile);
    left: 0;
    right: 0;
    z-index: 999;
    max-height: calc(100vh - var(--header-h-mobile));
    margin-top: 0;
    padding: 8px 16px 24px;
    background: var(--color-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 3px solid var(--color-accent);
    overflow-y: auto;
  }

  .site-nav[data-open] {
    display: flex;
  }

  .site-nav__list {
    gap: 0;
    padding: 6px 0;
  }

  .site-nav__link {
    padding: 14px 8px;
    border-left: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible,
  .site-nav__link[aria-current="page"] {
    padding-left: 8px;
  }

  .header-meta {
    margin-top: 24px;
  }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__intro {
    grid-column: 1 / -1;
  }

  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .brand-text small {
    display: none;
  }

  .nav-toggle__label {
    display: none;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
  }

  .site-footer__intro {
    grid-column: auto;
  }

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

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

  .stat-grid {
    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;
  }
}