:root {
  --color-highland-blue: #1B4F72;
  --color-sky-blue: #5DADE2;
  --color-snow-white: #F4F6F7;
  --color-grass-green: #27AE60;
  --color-orange: #E67E22;
  --color-ink: #17202A;
  --color-slate: #7F8C8D;
  --color-fog: #BDC3C7;
  --color-glacier: #AED6F1;
  --color-dusk: #F1C40F;
  --font-heading: "DIN Condensed", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-data: "Roboto Mono", "SF Mono", "Courier New", monospace;
  --content-max: 1280px;
  --shell-pad: clamp(1rem, 3vw, 2rem);
}

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-snow-white);
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font: inherit;
}

a {
  color: var(--color-highland-blue);
}

a:hover {
  color: var(--color-orange);
}

h1, h2, h3, h4 {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-ink);
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

#main-content {
  scroll-margin-top: 96px;
  outline: none;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 200;
  display: inline-block;
  padding: 0.75rem 1rem;
  background: var(--color-orange);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-highland-blue);
  color: var(--color-snow-white);
  border-bottom: 3px solid var(--color-orange);
}

.header-topline {
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-sky-blue) 0 18px,
    transparent 18px 28px,
    var(--color-orange) 28px 46px,
    transparent 46px 56px,
    var(--color-grass-green) 56px 74px,
    transparent 74px 84px
  );
}

.header-shell {
  max-width: var(--content-max);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem var(--shell-pad);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--color-snow-white);
  text-decoration: none;
}

.brand-link:hover {
  color: var(--color-dusk);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--color-orange);
  clip-path: polygon(8% 0, 92% 0, 100% 18%, 100% 82%, 92% 100%, 8% 100%, 0 82%, 0 18%);
}

.brand-mark-line {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--color-snow-white);
  transform: rotate(-38deg);
  box-shadow: -7px 7px 0 -1px var(--color-sky-blue);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  line-height: 0.95;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand-subtitle {
  font-family: var(--font-data);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-sky-blue);
  margin-top: 4px;
  padding-left: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem;
}

.nav-list a {
  display: block;
  padding: 0.55rem 0.7rem;
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.nav-list a:hover {
  color: var(--color-dusk);
  border-bottom-color: var(--color-orange);
}

.nav-list a[aria-current="page"] {
  color: var(--color-dusk);
  border-bottom-color: var(--color-orange);
  background: rgba(255, 255, 255, 0.08);
}

.nav-cta {
  display: inline-block;
  padding: 0.65rem 1.1rem;
  background: var(--color-orange);
  color: #fff;
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-cta:hover {
  background: var(--color-dusk);
  color: var(--color-ink);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  background: transparent;
  color: var(--color-snow-white);
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.nav-toggle-label {
  font-size: 0.85rem;
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-orange);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease, top 0.2s ease;
}

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

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

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

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

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

.header-progress {
  position: absolute;
  inset-inline: 0;
  bottom: -3px;
  height: 3px;
  background: transparent;
  pointer-events: none;
}

.header-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--color-grass-green), var(--color-dusk), var(--color-orange));
}

.site-footer {
  background: linear-gradient(180deg, var(--color-highland-blue) 0%, var(--color-ink) 160%);
  color: rgba(255, 255, 255, 0.86);
}

.footer-topline {
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-orange) 0 20px,
    var(--color-sky-blue) 20px 40px,
    var(--color-grass-green) 40px 60px,
    transparent 60px 80px
  );
}

.footer-shell {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 3rem var(--shell-pad) 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 1fr);
  gap: 2.5rem;
}

.footer-brand-col {
  max-width: 40rem;
}

.footer-brand {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 2.1rem;
  text-transform: uppercase;
  line-height: 1;
  color: #fff;
}

.footer-brand-en {
  margin: 0.4rem 0 1rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-sky-blue);
}

.footer-description {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 34rem;
}

.footer-trust {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  margin: 0;
  padding: 0.75rem;
  border-left: 3px solid var(--color-grass-green);
  background: rgba(255, 255, 255, 0.07);
  font-size: 0.85rem;
  color: var(--color-glacier);
  max-width: 34rem;
}

.footer-trust-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 0.45rem;
  background: var(--color-grass-green);
  transform: rotate(45deg);
}

.footer-title {
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-sky-blue);
  letter-spacing: 0.1em;
  border-bottom: 2px solid rgba(255, 255, 255, 0.15);
}

.footer-nav,
.footer-support {
  margin-bottom: 1.5rem;
}

.footer-nav-list {
  display: grid;
  gap: 0.35rem;
}

.footer-nav-list a {
  display: inline-block;
  padding: 0.25rem 0;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.92rem;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-nav-list a:hover {
  color: var(--color-dusk);
  border-bottom-color: var(--color-orange);
}

.footer-contact-list {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.footer-contact-item {
  display: grid;
  grid-template-columns: minmax(0, 4.5rem) 1fr;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.footer-contact-label {
  font-family: var(--font-data);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-sky-blue);
  padding-top: 0.2rem;
}

.footer-contact-value {
  color: rgba(255, 255, 255, 0.9);
}

.footer-bottom {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.site-main {
  min-height: 60vh;
}

.container {
  width: min(100% - 3rem, 1240px);
  margin-inline: auto;
}

.container-narrow {
  width: min(100% - 3rem, 860px);
  margin-inline: auto;
}

.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-header {
  max-width: 880px;
  margin-bottom: 2.5rem;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--color-orange);
  text-transform: uppercase;
}

.section-number {
  font-family: var(--font-data);
  font-size: 1.1rem;
  color: var(--color-sky-blue);
}

.section-title {
  margin: 0.5rem 0 1rem;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
}

.section-intro {
  color: var(--color-slate);
  max-width: 60ch;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--color-highland-blue);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn-primary {
  background: var(--color-orange);
  color: #fff;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.btn-primary:hover {
  background: var(--color-grass-green);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-highland-blue);
  border-color: var(--color-highland-blue);
}

.btn-outline:hover {
  background: var(--color-highland-blue);
  color: #fff;
}

.card {
  background: var(--color-snow-white);
  border: 1px solid var(--color-fog);
  box-shadow: 4px 4px 0 var(--color-glacier);
  padding: 1.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 8px 8px 0 var(--color-glacier);
}

.card-title {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.card-meta {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-slate);
  margin-bottom: 1rem;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--color-glacier);
  color: var(--color-highland-blue);
  font-family: var(--font-data);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tag-live {
  background: var(--color-orange);
  color: #fff;
}

.tag-data {
  background: var(--color-grass-green);
  color: #fff;
}

.data-label {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--color-slate);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.data-value {
  font-family: var(--font-data);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-highland-blue);
  font-variant-numeric: tabular-nums;
}

.note {
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-grass-green);
  background: var(--color-glacier);
  color: var(--color-ink);
  font-size: 0.9rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.8rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--color-fog);
}

.breadcrumbs a {
  color: var(--color-slate);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--color-orange);
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-highland-blue);
}

.media-frame {
  position: relative;
  display: block;
  aspect-ratio: var(--media-ratio, 16 / 9);
  background: var(--color-glacier);
  overflow: hidden;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(115deg, transparent 0 38%, rgba(27, 79, 114, 0.18) 38% 42%, transparent 42% 100%);
}

.media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--color-orange);
  z-index: 2;
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame[data-ratio="wide"] {
  --media-ratio: 16 / 9;
}

.media-frame[data-ratio="square"] {
  --media-ratio: 1 / 1;
}

.media-frame[data-ratio="portrait"] {
  --media-ratio: 3 / 4;
}

.hero-frame {
  position: relative;
  padding: clamp(2rem, 6vw, 4.5rem);
  background: var(--color-snow-white);
  border: 1px solid var(--color-fog);
  box-shadow: 6px 6px 0 var(--color-glacier);
}

.hero-frame::before {
  content: "";
  position: absolute;
  inset: 0.75rem;
  border: 1px solid var(--color-sky-blue);
  pointer-events: none;
}

.hero-frame::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 5px;
  background: var(--color-orange);
}

.hero-frame > * {
  position: relative;
  z-index: 1;
}

.exhibit-label {
  display: inline-block;
  padding: 0.3rem 0.7rem;
  background: var(--color-ink);
  color: var(--color-dusk);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.speed-lines {
  position: relative;
  overflow: hidden;
}

.speed-lines::before {
  content: "";
  position: absolute;
  inset: -40%;
  z-index: 0;
  background-image: repeating-linear-gradient(
    115deg,
    transparent 0,
    transparent 16px,
    rgba(231, 126, 34, 0.1) 16px,
    rgba(231, 126, 34, 0.1) 18px
  );
  pointer-events: none;
}

.speed-lines > * {
  position: relative;
  z-index: 1;
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 7;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 2rem;
    padding: 5rem 1.5rem 2rem;
    background: var(--color-highland-blue);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 0.35rem;
  }

  .nav-list a {
    padding: 0.95rem 1rem;
    font-size: 1.15rem;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

  .nav-list a:hover,
  .nav-list a[aria-current="page"] {
    border-left-color: var(--color-orange);
    border-bottom-color: transparent;
    background: rgba(255, 255, 255, 0.08);
  }

  .nav-cta {
    text-align: center;
    padding: 1rem 1.2rem;
    font-size: 1.1rem;
  }
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }

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

@media (max-width: 640px) {
  .header-shell {
    padding: 0.75rem 1rem;
  }

  .brand-subtitle {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-brand-col {
    grid-column: auto;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .site-nav {
    transition: none;
  }

  .skip-link {
    transition: none;
  }
}