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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  color: var(--mist);
  background-color: var(--deep-sea);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--dur) var(--ease); }
ul, ol { list-style: none; }

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

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
  border-radius: 2px;
}

:root {
  --deep-sea: #0A2540;
  --bright-blue: #0077B6;
  --coral: #FF6F61;
  --neon: #39FF14;
  --mist: #EAF0F5;
  --white: #ffffff;
  --ink: #333333;
  --link-blue: #1E96FC;

  --container: 1200px;
  --header-h: 76px;

  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 40px;
  --sp-5: 64px;
  --sp-6: 96px;

  --radius: 16px;
  --radius-sm: 8px;
  --shadow-soft: 0 8px 32px rgba(2, 12, 27, 0.35);
  --shadow-card: 0 6px 24px rgba(2, 12, 27, 0.3);

  --ease: ease-in-out;
  --dur: 0.2s;
}

h1, h2, h3, h4 {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
}

h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(26px, 3.5vw, 40px); }
h3 { font-size: 22px; }
h4 { font-size: 18px; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--sp-3);
  padding-right: var(--sp-3);
}

.container-narrow {
  max-width: 860px;
  margin: 0 auto;
  padding-left: var(--sp-3);
  padding-right: var(--sp-3);
}

.section { padding: var(--sp-6) 0; }
.section--tight { padding: var(--sp-4) 0; }

.skip-link {
  position: fixed;
  top: -100px;
  left: var(--sp-2);
  z-index: 999;
  padding: 10px 20px;
  background: var(--coral);
  color: var(--white);
  font-weight: 700;
  font-size: 15px;
  border-radius: 0 0 10px 10px;
  box-shadow: var(--shadow-soft);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 0; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 300;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}
.scroll-progress span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--coral), var(--neon));
  transition: width 0.08s linear;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  z-index: 200;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.site-header.is-scrolled {
  background-color: rgba(10, 37, 64, 0.9);
  border-bottom-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px rgba(2, 12, 27, 0.4);
}
@media (min-width: 769px) {
  .site-header.is-scrolled {
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
}

.site-header__inner {
  max-width: var(--container);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--sp-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  line-height: 1;
  flex-shrink: 0;
}
.site-brand:hover { color: var(--white); }

.site-brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 58% 42% 46% 54% / 48% 54% 46% 52%;
  background: linear-gradient(145deg, var(--coral) 0%, var(--bright-blue) 100%);
  position: relative;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(255, 111, 97, 0.25);
}
.site-brand__mark::after {
  content: "";
  position: absolute;
  left: 9px;
  right: 9px;
  bottom: 10px;
  height: 10px;
  border-bottom: 3px solid rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  transform: rotate(-10deg);
}

.site-brand__text {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.site-brand__tagline {
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.24em;
  color: var(--neon);
  opacity: 0.85;
  text-transform: uppercase;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav a {
  display: block;
  padding: 9px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(234, 240, 245, 0.82);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.site-nav a:hover {
  color: var(--white);
  background-color: rgba(255, 255, 255, 0.07);
}
.site-nav a[aria-current="page"] {
  color: var(--coral);
  font-weight: 700;
}
.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--coral);
}

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
  z-index: 260;
}
.nav-toggle span {
  display: block;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease), top 0.25s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle span:nth-child(3) { top: 28px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  top: 22px;
  transform: translateX(-50%) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: translateX(-50%) scaleX(0.3);
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  top: 22px;
  transform: translateX(-50%) rotate(-45deg);
}

.site-footer {
  background-color: #06192b;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--coral), var(--bright-blue), var(--neon), transparent);
  opacity: 0.5;
  pointer-events: none;
}
.site-footer::after {
  content: "";
  position: absolute;
  bottom: -40%;
  right: -10%;
  width: 60%;
  aspect-ratio: 1;
  border-radius: 70% 30% 64% 36% / 42% 68% 32% 58%;
  background: radial-gradient(circle at 30% 40%, rgba(57, 255, 20, 0.05), transparent 60%);
  pointer-events: none;
}

.site-footer__top {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--sp-5) var(--sp-3) var(--sp-4);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.6fr;
  gap: var(--sp-5);
  position: relative;
  z-index: 1;
}

.site-footer__brand .site-brand { margin-bottom: var(--sp-2); }

.site-footer__tagline {
  font-size: 14px;
  color: var(--neon);
  opacity: 0.75;
  letter-spacing: 0.04em;
  margin-bottom: var(--sp-2);
}

.site-footer__trust {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(234, 240, 245, 0.5);
  max-width: 300px;
}

.site-footer__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}

.site-footer__heading {
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: rgba(234, 240, 245, 0.35);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: 10px;
}
.site-footer__heading::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--coral);
  flex-shrink: 0;
}

.site-footer__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 16px;
}
.site-footer__list li a {
  display: block;
  padding: 6px 0;
  font-size: 15px;
  color: rgba(234, 240, 245, 0.75);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.site-footer__list li a:hover {
  color: var(--coral);
  transform: translateX(4px);
}

.site-footer__contact p {
  font-size: 14px;
  color: rgba(234, 240, 245, 0.7);
  margin-bottom: 8px;
  line-height: 1.5;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: var(--sp-2) 0;
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.02);
}

.site-footer__bottom-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-3);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-1) var(--sp-3);
  font-size: 13px;
  color: rgba(234, 240, 245, 0.45);
}

.site-footer__copy { margin-right: auto; }
.site-footer__link {
  font-size: 13px;
  color: rgba(234, 240, 245, 0.6);
  transition: color var(--dur) var(--ease);
}
.site-footer__link:hover { color: var(--neon); }
.site-footer__icp { letter-spacing: 0.06em; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 15px;
  font-weight: 700;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.2;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn--primary {
  background-color: var(--coral);
  color: var(--white);
  box-shadow: 0 4px 18px rgba(255, 111, 97, 0.35);
}
.btn--primary:hover {
  background-color: #ff8275;
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(255, 111, 97, 0.45);
}
.btn--ghost {
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--white);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--white);
  background-color: rgba(255, 255, 255, 0.08);
}
.btn--light {
  background-color: var(--mist);
  color: var(--deep-sea);
}
.btn--light:hover {
  background-color: var(--white);
  transform: translateY(-2px);
}
.btn--small {
  padding: 9px 18px;
  font-size: 14px;
}

.card {
  background-color: var(--mist);
  color: var(--ink);
  border-radius: var(--radius);
  padding: var(--sp-3);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.card .card__title {
  font-size: 20px;
  margin-bottom: 8px;
}
.card--dark {
  background-color: rgba(234, 240, 245, 0.05);
  color: rgba(234, 240, 245, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.card--dark:hover {
  background-color: rgba(234, 240, 245, 0.08);
}
.card--dark .card__title { color: var(--white); }

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

.exhibit-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--neon);
  text-transform: uppercase;
}
.exhibit-label::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--neon);
  flex-shrink: 0;
}
.exhibit-label--coral { color: var(--coral); }
.exhibit-label--coral::before { background: var(--coral); }

.section-title {
  margin: var(--sp-2) 0 0;
  font-size: clamp(28px, 4vw, 46px);
}
.section-title--light { color: var(--deep-sea); }

.section-desc {
  max-width: 480px;
  font-size: 16px;
  color: rgba(234, 240, 245, 0.6);
  margin-top: 10px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(234, 240, 245, 0.5);
  margin-bottom: var(--sp-3);
}
.breadcrumb a {
  color: rgba(234, 240, 245, 0.78);
}
.breadcrumb a:hover { color: var(--coral); }
.breadcrumb__sep { color: rgba(234, 240, 245, 0.3); }
.breadcrumb__current { color: var(--white); }

.page-header {
  padding: calc(var(--header-h) + var(--sp-5)) 0 var(--sp-5);
  background-color: var(--deep-sea);
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.page-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 100%;
  background:
    radial-gradient(ellipse at 85% 20%, rgba(0, 119, 182, 0.22), transparent 60%),
    radial-gradient(ellipse at 15% 90%, rgba(255, 111, 97, 0.08), transparent 50%);
  pointer-events: none;
}
.page-header__inner {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-3);
}
.page-header__title { margin-top: var(--sp-2); }
.page-header__desc {
  max-width: 520px;
  font-size: 17px;
  color: rgba(234, 240, 245, 0.65);
  margin-top: var(--sp-2);
}

.media {
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, rgba(0, 119, 182, 0.25), rgba(10, 37, 64, 0.5));
  position: relative;
  aspect-ratio: 16 / 9;
}
.media--portrait { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.35);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: rgba(57, 255, 20, 0.12);
  color: var(--neon);
  border: 1px solid rgba(57, 255, 20, 0.3);
}
.tag--coral {
  background: rgba(255, 111, 97, 0.12);
  color: var(--coral);
  border-color: rgba(255, 111, 97, 0.35);
}
.tag--blue {
  background: rgba(30, 150, 252, 0.12);
  color: var(--link-blue);
  border-color: rgba(30, 150, 252, 0.35);
}

.prose {
  color: rgba(234, 240, 245, 0.85);
  font-size: 16px;
  line-height: 1.85;
}
.prose p { margin-bottom: 1em; }
.prose h2, .prose h3 {
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-2);
}
.prose a {
  color: var(--link-blue);
  text-decoration: underline;
  text-decoration-color: rgba(30, 150, 252, 0.35);
  text-underline-offset: 3px;
}
.prose a:hover {
  color: var(--coral);
  text-decoration-color: var(--coral);
}
.prose ul, .prose ol {
  padding-left: 1.4em;
  margin-bottom: 1em;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }

.text-muted { color: rgba(234, 240, 245, 0.55); }
.text-dim { color: rgba(234, 240, 245, 0.75); }
.mt-1 { margin-top: var(--sp-1); }
.mt-2 { margin-top: var(--sp-2); }
.mt-3 { margin-top: var(--sp-3); }
.mt-4 { margin-top: var(--sp-4); }
.mt-5 { margin-top: var(--sp-5); }
.mb-2 { margin-bottom: var(--sp-2); }
.mb-3 { margin-bottom: var(--sp-3); }

@media (max-width: 992px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4);
  }
  .site-footer__brand { grid-column: 1 / -1; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  :root {
    --header-h: 64px;
    --sp-6: 64px;
    --sp-5: 48px;
  }

  .nav-toggle { display: block; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    background-color: rgba(10, 37, 64, 0.98);
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--sp-3);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.3s var(--ease), visibility 0.3s;
    box-shadow: -20px 0 50px rgba(2, 12, 27, 0.5);
    overflow-y: auto;
    z-index: 250;
  }
  .site-nav[data-open] {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .site-nav a {
    font-size: 17px;
    padding: 13px 14px;
    width: 100%;
  }
  .site-nav a[aria-current="page"]::after {
    left: 14px;
    right: auto;
    width: 28px;
    bottom: 4px;
  }

  .site-brand__text { font-size: 18px; }
  .site-brand__mark { width: 36px; height: 36px; }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
    padding-top: var(--sp-4);
  }
  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .site-footer__copy { margin-right: 0; }
}

@media (max-width: 480px) {
  .site-brand__tagline { display: none; }
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .site-header__inner {
    padding-left: var(--sp-2);
    padding-right: var(--sp-2);
  }
}

@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;
  }
  .scroll-progress span { transition: none; }
}