.page-about {
  --about-black: #0E0E0E;
  --about-green: #0A2E1F;
  --about-green-2: #103822;
  --about-silver: #C0C4C8;
  --about-accent: #F25C05;
  --about-highlight: #F2C14E;
  --about-cream: #F5F2EB;
  --about-warmgray: #D8D2C4;
  --about-font-display: "Arial Black", "DIN Alternate", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-mono: "Roboto Mono", "Courier New", "SF Mono", monospace;
  --about-font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  width: 100%;
  max-width: 100%;
  background: var(--about-black);
  color: var(--about-cream);
  font-family: var(--about-font-body);
  line-height: 1.65;
}

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

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  padding: 0.9rem 1.25rem;
  font-family: var(--about-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  background: #0A1B13;
  border-bottom: 1px solid rgba(192, 196, 200, 0.15);
}

.page-about .about-crumb a {
  color: var(--about-silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color var(--duration-fast, 180ms), color var(--duration-fast, 180ms);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--about-accent);
  border-color: currentColor;
  outline: none;
}

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

.page-about .about-hero {
  position: relative;
  padding: 3rem 1.25rem 2.75rem;
  background:
    radial-gradient(ellipse at 80% 12%, rgba(242, 92, 5, 0.14), transparent 48%),
    linear-gradient(140deg, #0A2E1F 0%, #0B2419 48%, #0E0E0E 100%);
  border-bottom: 1px solid rgba(242, 92, 5, 0.4);
  overflow: hidden;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

.page-about .about-kicker {
  font-family: var(--about-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--about-highlight);
  margin: 0 0 0.7rem;
}

.page-about .about-title {
  font-family: var(--about-font-display);
  font-size: 2.35rem;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--about-cream);
  margin: 0;
}

.page-about .about-subtitle {
  font-family: var(--about-font-mono);
  font-size: 0.9rem;
  color: var(--about-silver);
  margin: 0.6rem 0 1.1rem;
}

.page-about .about-lead {
  max-width: 42em;
  font-size: 1.03rem;
  color: var(--about-warmgray);
  margin: 0;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 0;
}

.page-about .about-hero-stat {
  background: rgba(14, 14, 14, 0.62);
  border: 1px solid rgba(192, 196, 200, 0.22);
  padding: 0.85rem 0.7rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  position: relative;
}

.page-about .about-hero-stat::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--about-accent);
  opacity: 0;
  transition: opacity var(--duration-fast, 180ms);
}

.page-about .about-hero-stat:hover::after {
  opacity: 1;
}

.page-about .about-hero-stat dt {
  font-family: var(--about-font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-silver);
}

.page-about .about-hero-stat dd {
  margin: 0;
  font-family: var(--about-font-display);
  font-size: 1.25rem;
  color: var(--about-highlight);
}

.page-about .about-hero-wave {
  position: absolute;
  right: -24px;
  bottom: -18px;
  width: 60vw;
  max-width: 380px;
  height: auto;
  opacity: 0.4;
  pointer-events: none;
}

.page-about .about-section {
  padding: 3.25rem 1.25rem;
  border-bottom: 1px solid rgba(192, 196, 200, 0.12);
}

.page-about .about-section-head {
  max-width: 1200px;
  margin: 0 auto 2.25rem;
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

.page-about .about-section-index {
  flex: none;
  font-family: var(--about-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--about-accent);
  background: rgba(242, 92, 5, 0.08);
  border: 1px solid rgba(242, 92, 5, 0.55);
  padding: 0.2rem 0.6rem;
  margin-top: 0.25rem;
}

.page-about .about-section-head h2 {
  font-family: var(--about-font-display);
  font-size: 1.5rem;
  line-height: 1.16;
  letter-spacing: 0.015em;
  color: var(--about-cream);
  margin: 0 0 0.2rem;
}

.page-about .about-section-sub {
  font-family: var(--about-font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--about-silver);
  margin: 0;
}

.page-about .about-origin {
  background: #0E0E0E;
}

.page-about .about-origin-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

.page-about .about-origin-copy > p {
  margin: 0 0 1rem;
  color: var(--about-warmgray);
}

.page-about .about-origin-copy > p:first-of-type::first-letter {
  float: left;
  font-family: var(--about-font-display);
  font-size: 2.7em;
  line-height: 0.85;
  color: var(--about-accent);
  padding: 0.06em 0.12em 0 0;
}

.page-about .about-origin-quote {
  margin: 1.6rem 0 0;
  padding: 1rem 1.1rem 1rem 1.3rem;
  border-left: 3px solid var(--about-accent);
  background: linear-gradient(135deg, rgba(10, 46, 31, 0.72), rgba(10, 46, 31, 0.24));
}

.page-about .about-origin-quote p {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.55;
  color: var(--about-cream);
}

.page-about .about-origin-quote cite {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--about-font-mono);
  font-style: normal;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--about-highlight);
}

.page-about .about-origin-figure {
  max-width: 480px;
}

.page-about .about-origin-note {
  border: 1px solid rgba(192, 196, 200, 0.2);
  background: rgba(10, 46, 31, 0.45);
  padding: 1.2rem 1.3rem;
}

.page-about .about-origin-note h3 {
  font-family: var(--about-font-display);
  font-size: 1rem;
  color: var(--about-highlight);
  margin: 0 0 0.9rem;
}

.page-about .about-origin-note ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-origin-note li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--about-warmgray);
}

.page-about .about-origin-note li::before {
  content: "";
  flex: none;
  width: 5px;
  height: 5px;
  background: var(--about-accent);
  transform: rotate(45deg);
  position: relative;
  top: -1px;
}

.page-about .about-milestone {
  background: linear-gradient(180deg, #0E0E0E, #0A1812 30%, #0E0E0E);
}

.page-about .about-milestone-grid {
  max-width: 1200px;
  margin: 0 auto;
}

.page-about .about-timeline-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.6rem;
  padding-bottom: 0.4rem;
}

.page-about .about-timeline-nav-label {
  font-family: var(--about-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--about-highlight);
  padding: 0.4rem 0;
  margin-right: 0.2rem;
}

.page-about .about-timeline-nav a {
  font-family: var(--about-font-mono);
  font-size: 0.76rem;
  text-decoration: none;
  color: var(--about-silver);
  border: 1px solid rgba(192, 196, 200, 0.28);
  padding: 0.32rem 0.65rem;
  transition: color var(--duration-fast, 180ms), border-color var(--duration-fast, 180ms), background-color var(--duration-fast, 180ms);
}

.page-about .about-timeline-nav a:hover,
.page-about .about-timeline-nav a:focus-visible {
  color: var(--about-accent);
  border-color: var(--about-accent);
  background: rgba(242, 92, 5, 0.08);
  outline: none;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-accent) 0%, rgba(242, 92, 5, 0.45) 28%, rgba(192, 196, 200, 0.35) 100%);
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 1.8rem;
  margin-bottom: 1.1rem;
  scroll-margin-top: 1.5rem;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 1rem;
  width: 7px;
  height: 7px;
  background: var(--about-accent);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px rgba(242, 92, 5, 0.18);
}

.page-about .about-timeline-year {
  display: inline-block;
  font-family: var(--about-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--about-highlight);
  border-bottom: 1px dashed rgba(242, 194, 78, 0.45);
  padding-bottom: 2px;
  margin-bottom: 0.35rem;
}

.page-about .about-timeline-card {
  background: linear-gradient(150deg, rgba(10, 46, 31, 0.62), rgba(14, 14, 14, 0.92));
  border: 1px solid rgba(192, 196, 200, 0.22);
  border-left: 2px solid var(--about-accent);
  transition: border-color var(--duration-medium, 320ms), background-color var(--duration-medium, 320ms);
}

.page-about .about-timeline-card[open] {
  border-color: rgba(242, 92, 5, 0.55);
  background: linear-gradient(150deg, rgba(10, 46, 31, 0.82), rgba(14, 14, 14, 0.95));
}

.page-about .about-timeline-card summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--about-font-display);
  font-size: 0.96rem;
  line-height: 1.4;
  color: var(--about-cream);
}

.page-about .about-timeline-card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline-card summary::after {
  content: "+";
  flex: none;
  font-family: var(--about-font-mono);
  font-size: 1.1rem;
  color: var(--about-accent);
  border: 1px solid rgba(242, 92, 5, 0.45);
  width: 1.6rem;
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast, 180ms), background-color var(--duration-fast, 180ms);
}

.page-about .about-timeline-card[open] summary::after {
  content: "–";
  background: rgba(242, 92, 5, 0.15);
}

.page-about .about-timeline-card summary:focus-visible {
  outline: 2px solid var(--about-accent);
  outline-offset: -2px;
}

.page-about .about-timeline-body {
  padding: 0.8rem 1.1rem 1.1rem;
  border-top: 1px solid rgba(192, 196, 200, 0.12);
  font-size: 0.92rem;
  color: var(--about-silver);
}

.page-about .about-timeline-body p {
  margin: 0;
}

.page-about .about-data {
  background: linear-gradient(180deg, #0E0E0E, #091510 40%, #0E0E0E);
}

.page-about .about-data-band {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.page-about .about-data-card-lg {
  grid-column: 1 / -1;
}

.page-about .about-data-card {
  position: relative;
  background: linear-gradient(145deg, rgba(10, 46, 31, 0.72), rgba(8, 16, 12, 0.9));
  border: 1px solid rgba(192, 196, 200, 0.18);
  padding: 1.2rem 1rem;
  min-height: 108px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  transition: border-color var(--duration-fast, 180ms), transform var(--duration-fast, 180ms);
}

.page-about .about-data-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, transparent 0 6px, rgba(242, 92, 5, 0.05) 6px 7px, transparent 7px 16px);
  opacity: 0;
  transition: opacity var(--duration-fast, 180ms);
}

.page-about .about-data-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  border-left: 22px solid transparent;
  border-bottom: 22px solid rgba(242, 92, 5, 0.34);
  opacity: 0;
  transition: opacity var(--duration-fast, 180ms);
}

.page-about .about-data-card:hover,
.page-about .about-data-card:focus-within {
  border-color: rgba(242, 92, 5, 0.6);
  transform: translateY(-2px);
}

.page-about .about-data-card:hover::before,
.page-about .about-data-card:hover::after {
  opacity: 1;
}

.page-about .about-data-num {
  position: relative;
  font-family: var(--about-font-display);
  font-size: 1.85rem;
  line-height: 1.1;
  color: var(--about-cream);
  transition: color var(--duration-fast, 180ms);
}

.page-about .about-data-card:hover .about-data-num {
  color: var(--about-highlight);
}

.page-about .about-data-unit {
  font-size: 0.75em;
  color: var(--about-accent);
  margin-left: 0.05em;
}

.page-about .about-data-label {
  position: relative;
  font-family: var(--about-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--about-silver);
}

.page-about .about-data-figure {
  max-width: 1200px;
  margin: 2rem auto 0;
  border: 1px solid rgba(192, 196, 200, 0.2);
  background: #08150E;
}

.page-about .about-honor {
  background: #0E0E0E;
}

.page-about .about-honor-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 1rem;
}

.page-about .about-honor-card {
  position: relative;
  background: rgba(10, 46, 31, 0.45);
  border: 1px solid rgba(192, 196, 200, 0.2);
  border-top: 2px solid var(--about-highlight);
  padding: 1.4rem 1.3rem 1.5rem;
  cursor: default;
  transition: border-color var(--duration-fast, 180ms), background-color var(--duration-fast, 180ms), transform var(--duration-fast, 180ms);
}

.page-about .about-honor-card:hover,
.page-about .about-honor-card:focus-visible {
  border-color: var(--about-accent);
  border-top-color: var(--about-accent);
  background: rgba(10, 46, 31, 0.75);
  transform: translateY(-2px);
  outline: none;
}

.page-about .about-honor-mark {
  position: absolute;
  right: 0.8rem;
  top: 0.8rem;
  color: rgba(242, 194, 78, 0.35);
  font-size: 0.85rem;
  transition: color var(--duration-fast, 180ms), transform var(--duration-fast, 180ms);
}

.page-about .about-honor-card:hover .about-honor-mark {
  color: var(--about-accent);
  transform: rotate(45deg);
}

.page-about .about-honor-card h3 {
  font-family: var(--about-font-display);
  font-size: 1rem;
  line-height: 1.3;
  color: var(--about-cream);
  margin: 0 0 0.6rem;
}

.page-about .about-honor-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--about-warmgray);
}

.page-about .about-team {
  background: linear-gradient(180deg, #0E0E0E, #102118 55%, #0E0E0E);
}

.page-about .about-team-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 2rem;
}

.page-about .about-team-copy > p {
  margin: 0 0 1rem;
  color: var(--about-warmgray);
}

.page-about .about-team-list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  border-top: 1px solid rgba(192, 196, 200, 0.14);
}

.page-about .about-team-list li {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(192, 196, 200, 0.14);
  font-size: 0.9rem;
  color: var(--about-silver);
}

.page-about .about-team-list li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--about-accent);
  transform: rotate(45deg);
}

.page-about .about-team-figure {
  border: 1px solid rgba(192, 196, 200, 0.2);
  background: #08150E;
}

.page-about .about-origin-figure img,
.page-about .about-data-figure img,
.page-about .about-team-figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-origin-figure img {
  max-height: 720px;
  object-fit: cover;
  object-position: center;
}

.page-about .about-data-figure img {
  max-height: 620px;
  object-fit: cover;
  object-position: center;
}

.page-about .about-team-figure img {
  max-height: 560px;
  object-fit: cover;
  object-position: center;
}

.page-about .about-next {
  padding: 3rem 1.25rem;
  background: linear-gradient(160deg, #0A2E1F, #080F0B);
  border-top: 1px solid rgba(242, 92, 5, 0.35);
}

.page-about .about-next-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: 1.2rem;
}

.page-about .about-next-title {
  font-family: var(--about-font-display);
  font-size: 1.35rem;
  line-height: 1.2;
  color: var(--about-cream);
  margin: 0;
}

.page-about .about-next-text {
  color: var(--about-silver);
  font-size: 0.92rem;
  margin: 0;
}

.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

@media (min-width: 700px) {
  .page-about .about-hero {
    padding: 4.5rem 3rem 4rem;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    align-items: end;
    gap: 3rem;
  }

  .page-about .about-title {
    font-size: 3.6rem;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-section {
    padding: 4.5rem 3rem;
  }

  .page-about .about-section-head h2 {
    font-size: 2rem;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.55fr) minmax(200px, 0.35fr);
    align-items: start;
  }

  .page-about .about-origin-figure {
    max-width: 100%;
  }

  .page-about .about-origin-note {
    margin-top: 0.4rem;
  }

  .page-about .about-milestone-grid {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .about-timeline-nav {
    position: sticky;
    top: 2rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    margin-bottom: 0;
    border-right: 1px solid rgba(192, 196, 200, 0.16);
    padding-right: 1.2rem;
  }

  .page-about .about-timeline-nav-label {
    text-align: right;
    padding: 0.2rem 0;
  }

  .page-about .about-timeline-nav a {
    display: block;
    text-align: right;
  }

  .page-about .about-data-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-data-card-lg {
    grid-column: span 2;
    grid-row: span 2;
    grid-column-start: 1;
    grid-row-start: 1;
    min-height: 0;
  }

  .page-about .about-data-card-lg .about-data-num {
    font-size: 3rem;
  }

  .page-about .about-data-card {
    min-height: 150px;
    padding: 1.5rem 1.2rem;
  }

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

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-next {
    padding: 4rem 3rem;
  }
}