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

:root {
  --color-primary: #0A1F44;
  --color-primary-soft: #1B3A6B;
  --color-primary-muted: #2E4E73;
  --color-accent: #FF6B35;
  --color-gold: #FFD700;
  --color-bg-light: #F2F4F8;
  --color-surface: #FFFFFF;
  --color-text: #0D1B2E;
  --color-text-muted: #5A6B7A;
  --color-line: #D0D5DD;
  --font-display: "Anton", "Impact", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Roboto", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
  --container-pad: clamp(16px, 4vw, 40px);
  --radius: 2px;
  --shadow-sm: 0 1px 2px rgba(10, 31, 68, 0.06);
  --shadow-md: 0 12px 24px rgba(10, 31, 68, 0.08);
}

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg-light);
  -webkit-font-smoothing: antialiased;
}

body, h1, h2, h3, h4, p, figure, ul, ol {
  margin: 0;
}

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

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

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

button {
  font: inherit;
}

[hidden] {
  display: none !important;
}

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

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

.site-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.site-section {
  padding-block: 72px;
}

.site-section--tight {
  padding-block: 40px;
}

.site-section--dark {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.82);
}

.site-section__head {
  max-width: 720px;
  margin-bottom: 40px;
}

.site-section__index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 0.86rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.site-section__index::before {
  content: "";
  width: 26px;
  height: 3px;
  background: var(--color-gold);
  transform: skewX(-45deg);
}

.site-section__title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.site-section--dark .site-section__title {
  color: #FFFFFF;
}

.site-section__desc {
  margin-top: 14px;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.site-section--dark .site-section__desc {
  color: rgba(255, 255, 255, 0.65);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  background: var(--color-accent);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 10px 16px;
  border-radius: var(--radius);
  transform: translateY(-300%);
  transition: transform 0.2s ease;
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 500;
  pointer-events: none;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  transform: scaleX(0);
  transform-origin: left center;
}

.site-header {
  position: relative;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.site-header__kicker {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header__kicker-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-block: 8px;
}

.site-header__kicker-item {
  margin: 0;
}

.site-header__kicker-item--hide {
  color: var(--color-gold);
}

.site-header__masthead {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 26px 0 24px;
}

.site-header .site-brand {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  line-height: 1;
}

.site-brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--color-primary);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 var(--color-accent);
}

.site-brand__mark svg {
  width: 26px;
  height: 26px;
}

.site-brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.site-brand__name em {
  font-style: normal;
  color: var(--color-accent);
}

.site-brand__caption {
  display: block;
  margin-top: 6px;
  font-size: 0.6rem;
  line-height: 1;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header__side {
  color: var(--color-text-muted);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.site-header__side--left {
  align-self: center;
}

.site-header__side--left::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  margin-right: 8px;
  vertical-align: middle;
  transform: skewX(-45deg);
}

.site-header__side--right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.site-header__issue {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
}

.site-nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 9px 12px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-nav-toggle:hover,
.site-nav-toggle[aria-expanded="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
}

.site-nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.site-nav-toggle__bars span {
  height: 2px;
  background: currentColor;
  transition: transform 0.2s ease;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bars span:first-child {
  transform: translateY(3px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bars span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

.site-nav {
  border-top: 2px solid var(--color-primary);
  border-bottom: 1px solid var(--color-line);
}

.site-nav__list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.site-nav__item {
  position: relative;
}

.site-nav__item + .site-nav__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 12px;
  background: var(--color-line);
  transform: translateY(-50%) skewX(-20deg);
}

.site-nav__link {
  display: inline-block;
  position: relative;
  padding: 14px 22px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  transition: color 0.18s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 6px;
  height: 3px;
  background: var(--color-accent);
  transform: skewX(-45deg);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.site-nav__link:hover {
  color: var(--color-primary);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  opacity: 1;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
}

.site-footer {
  position: relative;
  margin-top: 96px;
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.78);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent) 28%, var(--color-gold) 28%, var(--color-gold) 44%, transparent 44%);
}

.site-footer::after {
  content: "HISTORY";
  position: absolute;
  right: -0.05em;
  bottom: 30px;
  font-family: var(--font-display);
  font-size: clamp(90px, 18vw, 230px);
  line-height: 0.8;
  color: rgba(255, 255, 255, 0.035);
  white-space: nowrap;
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  padding-block: 64px 32px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__brand .site-brand__name {
  color: #FFFFFF;
}

.site-footer__brand .site-brand__caption {
  color: rgba(255, 255, 255, 0.5);
}

.site-brand--footer .site-brand__mark {
  background: var(--color-primary-soft);
  box-shadow: 3px 3px 0 var(--color-accent);
}

.site-footer__statement {
  margin-top: 20px;
  max-width: 36ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #FFFFFF;
}

.site-footer__title-index {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: 0.72rem;
  transform: skewX(-10deg);
}

.site-footer__list {
  display: grid;
  gap: 10px;
}

.site-footer__col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.site-footer__col a:hover {
  color: var(--color-gold);
  padding-left: 6px;
}

.site-footer__contact {
  display: grid;
  gap: 10px;
  font-style: normal;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

.site-footer__note {
  margin-top: 12px;
  max-width: 72ch;
  font-size: 0.76rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.45);
}

.label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.content {
  max-width: 72ch;
}

.content p {
  margin-bottom: 1.2em;
}

.content h2,
.content h3 {
  font-family: var(--font-display);
  color: var(--color-primary);
  margin: 1.6em 0 0.6em;
}

.content h2 {
  font-size: 1.6rem;
}

.content h3 {
  font-size: 1.2rem;
}

.content ul,
.content ol {
  margin: 0 0 1.2em 1.2em;
}

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

.content blockquote {
  border-left: 3px solid var(--color-gold);
  padding-left: 1em;
  color: var(--color-text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--primary {
  background: var(--color-primary);
  color: #FFFFFF;
}

.btn--primary:hover {
  background: var(--color-primary-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--accent {
  background: var(--color-accent);
  color: #FFFFFF;
}

.btn--accent:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn--ghost:hover {
  background: var(--color-primary);
  color: #FFFFFF;
}

.btn--sm {
  padding: 8px 14px;
  font-size: 0.76rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg-light);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chip--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #FFFFFF;
}

.chip--gold {
  background: rgba(255, 215, 0, 0.18);
  border-color: rgba(255, 215, 0, 0.6);
  color: #8A6D00;
}

.chip--outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.breadcrumb {
  margin: 24px 0;
  font-size: 0.78rem;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-line);
}

.breadcrumb__link {
  color: var(--color-text-muted);
}

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

.breadcrumb__current {
  color: var(--color-primary);
  font-weight: 700;
}

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

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

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

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

.card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-accent);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card__index {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--color-line);
}

.card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.card__meta {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.card__body {
  margin-top: 12px;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--color-text);
}

.stat {
  padding: 20px 0 20px 18px;
  border-left: 3px solid var(--color-gold);
}

.stat__number {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1;
  color: var(--color-primary);
}

.stat__label {
  margin-top: 6px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-primary));
  border: 1px solid var(--color-line);
}

.img-frame::before {
  content: attr(data-caption);
  position: absolute;
  inset: auto 0 0 0;
  z-index: 3;
  padding: 16px;
  color: #FFFFFF;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: linear-gradient(180deg, transparent, rgba(10, 31, 68, 0.62));
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, transparent 70%, rgba(255, 107, 53, 0.35));
}

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

.img-frame__placeholder {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.6);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.img-frame--portrait {
  aspect-ratio: 3 / 4;
}

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

.img-frame--hero {
  aspect-ratio: auto;
  height: 62vh;
  min-height: 360px;
}

.timeline {
  position: relative;
}

.timeline__item {
  position: relative;
  padding: 0 0 36px 28px;
  margin-left: 8px;
  border-left: 1px solid var(--color-line);
}

.timeline__item:last-child {
  border-left-color: transparent;
  padding-bottom: 4px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 4px;
  width: 9px;
  height: 9px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.timeline__item:last-child::before {
  background: var(--color-gold);
}

.timeline__date {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  border: 1px solid var(--color-line);
  background: var(--color-bg-light);
  font-family: var(--font-display);
  font-size: 0.86rem;
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.timeline__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.timeline__body {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-btn {
  appearance: none;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 9px 16px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-btn.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 3px 3px 0 var(--color-accent);
}

[data-filter-item].is-hidden {
  display: none;
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

.js [data-reveal].delay-1 {
  transition-delay: 0.1s;
}

.js [data-reveal].delay-2 {
  transition-delay: 0.2s;
}

.js [data-reveal].delay-3 {
  transition-delay: 0.3s;
}

@media (max-width: 1023px) {
  .grid--3,
  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .site-section {
    padding-block: 56px;
  }
}

@media (max-width: 899px) {
  .site-header__side--left,
  .site-header__issue {
    display: none;
  }

  .site-header__masthead {
    padding: 16px 0 12px;
  }

  .site-header .site-brand {
    position: static;
    transform: none;
  }

  .site-brand__name {
    font-size: 28px;
  }

  .site-brand__mark {
    width: 36px;
    height: 36px;
    box-shadow: 2px 2px 0 var(--color-accent);
  }

  .site-brand__mark svg {
    width: 22px;
    height: 22px;
  }

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

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 90;
    background: var(--color-primary);
    border: none;
    box-shadow: 0 18px 30px rgba(10, 31, 68, 0.25);
  }

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

  .site-nav__list {
    flex-direction: column;
    padding: 10px 0;
  }

  .site-nav__item + .site-nav__item::before {
    display: none;
  }

  .site-nav__link {
    display: block;
    padding: 15px 24px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--color-gold);
  }

  .site-nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-accent);
  }

  .site-footer {
    margin-top: 64px;
  }
}

@media (max-width: 639px) {
  .site-header__kicker-item--hide {
    display: none;
  }

  .site-header__kicker-inner {
    justify-content: space-between;
    gap: 12px;
  }

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

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .site-footer__inner {
    padding-block: 48px 24px;
  }

  .site-section {
    padding-block: 40px;
  }

  .site-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;
  }

  .js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}