:root {
  --color-navy: #0A1E3C;
  --color-navy-deep: #071528;
  --color-navy-secondary: #122A4A;
  --color-lime: #C4FF00;
  --color-gold: #F2B705;
  --color-light: #F5F7FA;
  --color-white: #FFFFFF;
  --color-text: #202A3A;
  --color-gray: #6B7A8F;
  --color-line: #E0E5EC;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-h: 72px;
  --container-w: 1280px;
  --shadow: 8px 8px 0 rgba(10, 30, 60, 0.25);
  --progress: 0;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-light);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
}

ul[class], ol[class] {
  list-style: none;
  padding: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

::selection {
  background: var(--color-lime);
  color: var(--color-navy);
}

:focus-visible {
  outline: 4px solid var(--color-lime);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.container {
  width: min(var(--container-w), calc(100% - 2rem));
  margin-inline: auto;
}

@media (min-width: 768px) {
  .container {
    width: min(var(--container-w), calc(100% - 3rem));
  }
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  padding: 0.875rem 1.25rem;
  background: var(--color-lime);
  color: var(--color-navy);
  font-weight: 900;
  border: 3px solid var(--color-navy);
  transform: translateY(-120%);
  transition: transform 0.15s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 220;
  background: var(--color-lime);
  transform-origin: 0 50%;
  transform: scaleX(var(--progress, 0));
  pointer-events: none;
  opacity: 0.95;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  min-height: var(--header-h);
  background: transparent;
  color: var(--color-white);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(10, 30, 60, 0.96);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 900;
  font-size: 1.375rem;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: var(--color-white);
}

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

.brand-symbol {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  height: 32px;
}

.brand-symbol i {
  display: block;
  width: 4px;
  height: 14px;
  background: var(--color-lime);
  transform: skewX(-12deg);
  border-radius: 2px 0 0 2px;
}

.brand-symbol i:nth-child(1) {
  height: 16px;
}

.brand-symbol i:nth-child(2) {
  height: 30px;
  background: var(--color-gold);
}

.brand-symbol i:nth-child(3) {
  height: 22px;
}

.brand-text {
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: rgba(10, 30, 60, 0.35);
  border: 2px solid var(--color-lime);
  color: var(--color-white);
  font-weight: 700;
  cursor: pointer;
}

.nav-toggle:hover {
  background: rgba(196, 255, 0, 0.15);
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 22px;
  height: 16px;
}

.nav-toggle-icon span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-lime);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle-icon span:nth-child(1) {
  top: 0;
}

.nav-toggle-icon span:nth-child(2) {
  top: 7px;
}

.nav-toggle-icon span:nth-child(3) {
  top: 14px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(1) {
  top: 7px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon span:nth-child(3) {
  top: 7px;
  transform: rotate(-45deg);
}

.nav-toggle-text {
  font-size: 0.875rem;
}

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.25rem;
}

.nav-link {
  display: inline-block;
  padding: 0.5rem 0.875rem;
  color: rgba(255, 255, 255, 0.88);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  border: 2px solid transparent;
  text-shadow: 0 1px 3px rgba(10, 30, 60, 0.6);
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.nav-link:hover {
  color: var(--color-lime);
  border-color: rgba(196, 255, 0, 0.45);
}

.nav-link[aria-current="page"] {
  color: var(--color-navy);
  background: var(--color-lime);
  border-color: var(--color-lime);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.2);
  text-shadow: none;
}

@media (max-width: 991px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: grid;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-navy);
    border-top: 3px solid var(--color-lime);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
    padding: 0 1rem 1.25rem;
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .site-nav[data-open="true"] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

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

  .nav-link {
    display: block;
    padding: 0.875rem 0.5rem;
    color: var(--color-white);
    border-bottom: 1px solid rgba(245, 247, 250, 0.12);
    border-left: 3px solid transparent;
    text-shadow: none;
  }

  .nav-link:hover {
    border-left-color: var(--color-lime);
    background: rgba(196, 255, 0, 0.06);
  }

  .nav-link[aria-current="page"] {
    background: rgba(196, 255, 0, 0.12);
    border-left-color: var(--color-lime);
    border-bottom-color: rgba(196, 255, 0, 0.12);
    color: var(--color-lime);
    box-shadow: none;
  }
}

.site-footer {
  background: var(--color-navy);
  color: #C7D0DC;
  border-top: 6px solid var(--color-lime);
}

.footer-inner {
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2.5rem;
}

.footer-brand-block {
  grid-column: span 4;
}

.footer-col {
  grid-column: span 2;
}

.footer-col:last-child {
  grid-column: span 4;
}

.footer-brand-block .brand {
  margin-bottom: 1rem;
}

.footer-tagline {
  color: #A9B8C9;
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.footer-trust {
  font-size: 0.8125rem;
  color: #8FA2B8;
  border-left: 3px solid var(--color-lime);
  padding-left: 1rem;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-links {
  display: grid;
  gap: 0.5rem;
}

.footer-links a {
  color: #C7D0DC;
  font-size: 0.9375rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--color-lime);
}

.footer-contact {
  display: grid;
  gap: 0.625rem;
  font-size: 0.875rem;
}

.footer-contact li {
  display: grid;
  gap: 0.125rem;
}

.footer-contact span {
  color: var(--color-gold);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-contact a {
  color: #EFF3F9;
}

.footer-contact a:hover {
  color: var(--color-lime);
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(245, 247, 250, 0.15);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-copy {
  margin: 0;
  font-size: 0.8125rem;
  color: #8FA2B8;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-legal a {
  color: #C7D0DC;
  font-size: 0.8125rem;
  border-bottom: 2px solid transparent;
}

.footer-legal a:hover {
  color: var(--color-lime);
  border-bottom-color: var(--color-lime);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: 3px solid var(--color-navy);
  background: var(--color-lime);
  color: var(--color-navy);
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-transform: uppercase;
  box-shadow: 6px 6px 0 rgba(10, 30, 60, 0.3);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(10, 30, 60, 0.4);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(10, 30, 60, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-lime);
  box-shadow: none;
}

.btn-ghost:hover {
  background: rgba(196, 255, 0, 0.12);
  color: var(--color-lime);
  box-shadow: none;
}

.btn-ghost:active {
  transform: translate(1px, 1px);
}

.btn-small {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  border-width: 2px;
  letter-spacing: 0.02em;
  box-shadow: 4px 4px 0 rgba(10, 30, 60, 0.25);
}

.btn-small:hover {
  box-shadow: 5px 5px 0 rgba(10, 30, 60, 0.35);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem 0.5rem;
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  font-size: 0.875rem;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-gold);
  font-weight: 700;
}

.breadcrumbs a {
  color: var(--color-navy);
  border-bottom: 2px solid transparent;
}

.breadcrumbs a:hover {
  border-bottom-color: var(--color-navy);
}

.breadcrumbs [aria-current="page"] {
  color: var(--color-gray);
  font-weight: 700;
}

.section {
  padding: 4.5rem 0;
}

.section-dark {
  background: var(--color-navy);
  color: var(--color-white);
}

.section-light {
  background: var(--color-light);
  color: var(--color-text);
}

.section-lime {
  background: var(--color-lime);
  color: var(--color-navy);
}

.section-heading {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 3.25rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.section-heading::before {
  content: "// ";
  color: var(--color-gold);
}

.section-intro {
  margin: 1rem 0 0;
  max-width: 65ch;
  font-size: 1rem;
  color: inherit;
  opacity: 0.85;
}

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

.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));
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--color-white);
  border: 3px solid var(--color-navy);
  box-shadow: 8px 8px 0 rgba(10, 30, 60, 0.2);
  padding: 1.5rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 12px 12px 0 rgba(10, 30, 60, 0.28);
}

.card--dark {
  background: var(--color-navy-secondary);
  color: var(--color-white);
  border-color: var(--color-navy-deep);
}

.card--dark .card-text {
  color: #C7D0DC;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 900;
  margin: 0;
  line-height: 1.2;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-gold);
}

.card-text {
  font-size: 0.9375rem;
  margin: 0;
  color: var(--color-gray);
}

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-navy-secondary);
  border: 3px solid var(--color-navy);
  box-shadow: 6px 6px 0 rgba(10, 30, 60, 0.18);
  aspect-ratio: 16 / 10;
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(120deg, rgba(196, 255, 0, 0.12), rgba(242, 183, 5, 0.06));
}

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

.media-frame[data-format="portrait"] {
  aspect-ratio: 4 / 5;
}

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

.media-frame[data-format="wide"] {
  aspect-ratio: 21 / 9;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2rem;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 2px solid var(--color-navy);
  background: var(--color-light);
  color: var(--color-navy);
  font-weight: 700;
  font-size: 0.875rem;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--color-gold);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.filter-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--color-gold);
}

.filter-btn[aria-pressed="true"] {
  background: var(--color-lime);
  border-color: var(--color-navy);
  color: var(--color-navy);
  box-shadow: none;
  transform: translate(1px, 1px);
}

.filter-item[hidden] {
  display: none !important;
}

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

.timeline {
  position: relative;
  padding-left: 2rem;
  margin: 2rem 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 4px;
  background: var(--color-navy);
}

.timeline-item {
  position: relative;
  padding: 0 0 2rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-navy);
  box-shadow: 0 0 0 4px rgba(196, 255, 0, 0.35);
}

.timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-gold);
}

.stat-number {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-lime);
  text-shadow: 4px 4px 0 rgba(10, 30, 60, 0.2);
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.page-cover {
  min-height: 85vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 3rem) 0 3rem;
  background: var(--color-navy);
  color: var(--color-white);
}

.page-cover::before {
  content: "";
  position: absolute;
  left: -5%;
  bottom: -10%;
  width: 120%;
  height: 40%;
  background: linear-gradient(105deg, rgba(196, 255, 0, 0.16) 0%, transparent 60%);
  transform: skewY(-2deg);
  pointer-events: none;
}

.page-cover-title {
  font-size: clamp(2.5rem, 8vw, 6rem);
  line-height: 0.95;
  font-weight: 900;
  text-transform: uppercase;
  max-width: 12ch;
}

.page-cover-intro {
  max-width: 55ch;
  color: rgba(255, 255, 255, 0.82);
}

.text-mono {
  font-family: var(--font-mono);
}

.text-lime {
  color: var(--color-lime);
}

.text-gold {
  color: var(--color-gold);
}

.bg-navy {
  background: var(--color-navy);
  color: var(--color-white);
}

.bg-lime {
  background: var(--color-lime);
  color: var(--color-navy);
}

.bg-light {
  background: var(--color-light);
  color: var(--color-text);
}

@media (max-width: 991px) {
  .footer-grid {
    gap: 2rem;
  }

  .footer-brand-block {
    grid-column: span 12;
  }

  .footer-col {
    grid-column: span 4;
  }

  .footer-col:last-child {
    grid-column: span 12;
  }

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

@media (max-width: 600px) {
  .footer-grid {
    gap: 1.5rem;
  }

  .footer-col {
    grid-column: span 12;
  }

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

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

@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;
    transition-delay: 0ms !important;
  }

  .nav-link,
  .btn,
  .card,
  .filter-btn {
    transition: none;
  }
}