.page-about {
  --about-navy: #0B1B3A;
  --about-blue: #1E4FA3;
  --about-gold: #C9A227;
  --about-vermilion: #C8352A;
  --about-paper: #FAF7F0;
  --about-white: #FFFFFF;
  --about-ink: #0A0A0A;
  --about-body: #26313D;
  --about-muted: #5B6B7C;
  --about-border: rgba(11, 27, 58, 0.12);
  --about-radius: 4px;
}

.page-about .site-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-about .about-arch {
  background: var(--about-paper);
  overflow: hidden;
}

.page-about .about-head {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
}

.page-about .about-head::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--about-gold), transparent);
}

.page-about .about-head__meta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .about-head__route {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--about-muted);
  font-family: var(--font-data);
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-head__title {
  font-size: clamp(2rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--about-navy);
  margin: 0 0 24px;
  letter-spacing: -0.02em;
}

.page-about .about-head__lead {
  max-width: 720px;
  margin: 0 auto;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 2;
  color: var(--about-body);
}

.page-about .about-overview {
  display: grid;
  grid-template-columns: 1fr;
  gap: 64px;
  padding: 0 0 80px;
}

.page-about .about-overview__copy {
  max-width: 680px;
}

.page-about .about-overview__h {
  font-size: clamp(1.25rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--about-navy);
  margin: 20px 0 24px;
}

.page-about .about-overview__p {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 2;
  color: var(--about-body);
  margin: 0 0 16px;
}

.page-about .about-overview__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--about-border);
  border: 1px solid var(--about-border);
  margin: 0;
}

.page-about .about-stat {
  background: var(--about-white);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin: 0;
}

.page-about .about-stat dt {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--about-muted);
  order: 1;
}

.page-about .about-stat dd {
  margin: 0;
  order: 0;
}

.page-about .about-stat .site-stat {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  color: var(--about-gold);
  font-family: var(--font-data);
}

.page-about .site-section {
  padding: 80px 0;
}

.page-about .site-section--white {
  background: var(--about-white);
}

.page-about .site-section--paper {
  background: var(--about-paper);
}

.page-about .site-section--dark {
  background: var(--about-navy);
}

.page-about .about-milestone,
.page-about .about-team,
.page-about .about-credential,
.page-about .about-ecosystem {
  position: relative;
}

.page-about .about-milestone__intro,
.page-about .about-team__intro {
  margin-bottom: 64px;
}

.page-about .about-milestone__h,
.page-about .about-team__h,
.page-about .about-ecosystem__h {
  font-size: clamp(1.5rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--about-navy);
  margin: 16px 0 16px;
}

.page-about .about-milestone__lead,
.page-about .about-team__lead {
  font-size: 1.0625rem;
  line-height: 2;
  color: var(--about-body);
  max-width: 640px;
  font-family: var(--font-body);
}

.page-about .about-timeline {
  position: relative;
  padding-left: 16px;
}

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

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 48px 56px;
  border-left: 2px solid var(--about-border);
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-timeline__node {
  position: absolute;
  left: -16px;
  top: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--about-white);
  border: 3px solid var(--about-gold);
  border-radius: 50%;
}

.page-about .about-timeline__year {
  position: absolute;
  left: calc(-100% - 40px);
  top: 2px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 600;
  color: var(--about-gold);
  white-space: nowrap;
}

.page-about .about-timeline__line {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 14px;
  height: 14px;
  background: var(--about-white);
  border: 3px solid var(--about-gold);
  border-radius: 50%;
}

.page-about .about-timeline__content {
  background: var(--about-white);
  padding: 24px;
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
}

.page-about .about-timeline__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--about-navy);
  margin: 0 0 8px;
}

.page-about .about-timeline__content p {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-body);
  margin: 0;
}

.page-about .about-timeline__image {
  margin-top: 48px;
}

.page-about .about-timeline__image img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-border);
}

.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .about-team__chart {
  order: 2;
}

.page-about .about-team__chart img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--about-border);
}

.page-about .about-team__list {
  order: 1;
}

.page-about .about-team__filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .about-team__filter-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--about-muted);
  text-transform: uppercase;
}

.page-about .about-team__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .filter-btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--about-border);
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-heading);
  color: var(--about-body);
  cursor: pointer;
  transition: all 0.2s ease;
}

.page-about .filter-btn:hover,
.page-about .filter-btn.is-active {
  background: var(--about-navy);
  border-color: var(--about-navy);
  color: var(--about-white);
}

.page-about .about-team__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__card {
  background: var(--about-white);
  padding: 24px;
  border-left: 3px solid var(--about-gold);
  box-shadow: 0 1px 0 rgba(11, 27, 58, 0.04);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.page-about .about-team__card.is-hidden {
  display: none;
}

.page-about .about-team__role {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--about-navy);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.page-about .about-team__card p {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-body);
  margin: 0;
}

.page-about .about-credential__intro,
.page-about .about-ecosystem__head {
  margin-bottom: 48px;
}

.page-about .about-credential__h {
  font-size: clamp(1.5rem, 3.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--about-white);
  margin: 16px 0 16px;
}

.page-about .about-credential__lead {
  font-size: 1.0625rem;
  line-height: 2;
  color: rgba(255, 255, 255, 0.72);
  max-width: 640px;
  font-family: var(--font-body);
}

.page-about .about-credential__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  margin-bottom: 48px;
}

.page-about .about-credential__item {
  background: var(--about-navy);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-credential__name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-gold);
}

.page-about .about-credential__detail {
  font-size: clamp(1.125rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--about-white);
  margin: 0;
  line-height: 1.4;
}

.page-about .about-credential__tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 4px 12px;
  letter-spacing: 0.06em;
}

.page-about .about-credential__image img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-ecosystem__h {
  margin-top: 16px;
}

.page-about .about-ecosystem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.page-about .about-ecosystem__item {
  padding: 40px 32px;
  background: var(--about-paper);
  border-top: 3px solid var(--about-gold);
  box-shadow: 0 1px 0 rgba(11, 27, 58, 0.04);
}

.page-about .about-ecosystem__index {
  font-family: var(--font-data);
  font-size: 24px;
  font-weight: 700;
  color: var(--about-gold);
  display: block;
  margin-bottom: 16px;
}

.page-about .about-ecosystem__name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--about-navy);
  margin: 0 0 12px;
  line-height: 1.4;
}

.page-about .about-ecosystem__item p {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-body);
  margin: 0;
}

.page-about .about-ecosystem__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .site-btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-heading);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.2s ease;
  cursor: pointer;
}

.page-about .site-btn--gold {
  background: var(--about-gold);
  color: var(--about-white);
  border: 1px solid var(--about-gold);
}

.page-about .site-btn--gold:hover {
  background: #b18a21;
  border-color: #b18a21;
}

.page-about .site-btn--ghost {
  background: transparent;
  color: var(--about-navy);
  border: 1px solid var(--about-navy);
}

.page-about .site-btn--ghost:hover {
  background: var(--about-navy);
  color: var(--about-white);
}

@media (min-width: 640px) {
  .page-about .site-container {
    padding: 0 40px;
  }

  .page-about .about-head {
    padding: 140px 0 96px;
  }

  .page-about .about-overview {
    grid-template-columns: 1fr;
  }

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

  .page-about .about-team__cards {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-about .about-ecosystem__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-ecosystem__item:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .site-container {
    padding: 0 56px;
  }

  .page-about .about-head {
    padding: 160px 0 120px;
  }

  .page-about .about-overview {
    grid-template-columns: 7fr 5fr;
    gap: 80px;
    align-items: center;
  }

  .page-about .about-overview__copy {
    max-width: 640px;
  }

  .page-about .about-team__layout {
    grid-template-columns: 5fr 7fr;
    gap: 64px;
    align-items: start;
  }

  .page-about .about-team__chart {
    order: 1;
  }

  .page-about .about-team__list {
    order: 2;
  }

  .page-about .about-team__cards {
    grid-template-columns: 1fr;
  }

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

  .page-about .about-ecosystem__item:last-child {
    grid-column: auto;
  }
}