.page-about {
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about a:hover,
.page-about a:focus-visible {
  text-decoration: underline;
}

.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .about-crumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--gutter) 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--mist);
}

.page-about .about-crumb a:hover {
  color: var(--cyan);
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--gutter) 40px;
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .about-hero__rail .eyebrow {
  color: var(--cyan);
  letter-spacing: 0.2em;
  font-size: 11px;
  white-space: nowrap;
}

.page-about .about-hero__ticks {
  flex: 1;
  height: 12px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line-cyan) 0,
    var(--line-cyan) 1px,
    transparent 1px,
    transparent 14px
  );
  background-position: left bottom;
  background-size: 100% 7px;
  background-repeat: repeat-x;
  border-bottom: 2px solid var(--line-cyan);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-size: clamp(48px, 13vw, 132px);
  font-weight: 200;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--white);
}

.page-about .about-hero__lead {
  max-width: 54ch;
  margin: 0;
  font-size: 1rem;
  color: rgba(234, 246, 255, 0.82);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--ink-deep);
  padding: 16px 14px 18px;
}

.page-about .about-stat dt {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

/* ---------- Yearbook shell ---------- */

.page-about .yearbook {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter) 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .yb-rail {
  display: none;
}

.page-about .yb-body {
  min-width: 0;
}

.page-about .yb-section {
  padding: 46px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 92px;
}

.page-about .yb-section--teal {
  background: linear-gradient(180deg, rgba(6, 42, 46, 0.85) 0%, rgba(6, 42, 46, 0) 100%);
  padding-left: 18px;
  padding-right: 18px;
  margin-left: -18px;
  margin-right: -18px;
}

.page-about .yb-section--wine {
  background: linear-gradient(180deg, rgba(59, 12, 34, 0.8) 0%, rgba(59, 12, 34, 0) 100%);
  padding-left: 18px;
  padding-right: 18px;
  margin-left: -18px;
  margin-right: -18px;
}

.page-about .eyebrow {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .yb-title {
  margin: 0 0 14px;
  font-size: clamp(28px, 6.4vw, 52px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .yb-lead {
  max-width: 58ch;
  margin: 0 0 26px;
  color: rgba(234, 246, 255, 0.78);
}

/* ---------- Figures ---------- */

.page-about .about-figure {
  margin: 0 0 30px;
  border: 3px solid var(--line);
  background: var(--glass);
  overflow: hidden;
}

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

.page-about .about-figure--wide {
  aspect-ratio: 16 / 7;
}

.page-about .about-figure--wide img {
  height: 100%;
}

.page-about .about-figure--city {
  aspect-ratio: 3 / 2;
  border-color: var(--line-cyan);
}

.page-about .about-figure--city img {
  height: 100%;
}

.page-about .about-figure--team {
  aspect-ratio: 4 / 3;
  margin: 0 0 22px;
}

.page-about .about-figure--team img {
  height: 100%;
}

/* ---------- Timeline ---------- */

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

.page-about .timeline__item {
  position: relative;
  padding: 26px 0 28px;
  border-top: 1px solid var(--line);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 14px;
  height: 7px;
  background: var(--cyan);
  box-shadow: 0 0 14px rgba(63, 240, 216, 0.6);
}

.page-about .timeline__item--now::before {
  background: var(--orange);
  box-shadow: 0 0 16px rgba(255, 138, 43, 0.7);
}

.page-about .timeline__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(38px, 11vw, 84px);
  font-weight: 200;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: rgba(234, 246, 255, 0.9);
}

.page-about .timeline__item--now .timeline__year {
  color: var(--orange);
}

.page-about .timeline__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--white);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 60ch;
  color: rgba(234, 246, 255, 0.74);
  font-size: 15px;
}

/* ---------- Region map ---------- */

.page-about .region-map {
  display: grid;
  gap: 20px;
  margin-bottom: 20px;
}

.page-about .region-map__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .region-map__label .num {
  color: var(--cyan);
  font-size: 15px;
  font-weight: 700;
}

.page-about .region-map__cells {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
}

.page-about .region-map__cells span {
  display: block;
  aspect-ratio: 1 / 1;
  background: var(--teal-deep);
  border: 1px solid var(--line-cyan);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 7px 100%, 0 calc(100% - 7px));
  transition: background var(--tap) var(--ease), transform var(--tap) var(--ease);
}

.page-about .region-map__cells span:nth-child(3n) {
  background: rgba(63, 240, 216, 0.14);
}

.page-about .region-map__cells span:nth-child(4n + 1) {
  background: rgba(34, 26, 71, 0.85);
}

.page-about .region-map__cells span:hover {
  background: var(--cyan);
  transform: scale(1.04);
}

.page-about .region-map__group--overseas .region-map__cells span {
  background: rgba(255, 138, 43, 0.16);
  border-color: rgba(255, 138, 43, 0.42);
}

.page-about .region-map__group--overseas .region-map__cells span:hover {
  background: var(--orange);
}

.page-about .region-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  list-style: none;
  margin: 0 0 28px;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .map-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .map-legend__dot {
  width: 10px;
  height: 10px;
  display: inline-block;
}

.page-about .map-legend__dot--domestic {
  background: var(--teal-deep);
  border: 1px solid var(--line-cyan);
}

.page-about .map-legend__dot--overseas {
  background: rgba(255, 138, 43, 0.5);
  border: 1px solid var(--orange);
}

.page-about .map-legend__dot--focus {
  background: var(--red);
}

.page-about .region-notes {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .region-note {
  background: var(--ink-deep);
  padding: 20px 18px;
}

.page-about .region-note h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 800;
  color: var(--cyan);
}

.page-about .region-note p {
  margin: 0;
  font-size: 14px;
  color: rgba(234, 246, 255, 0.74);
}

.page-about .region-link,
.page-about .partner-link {
  margin: 24px 0 0;
  font-size: 14px;
  color: var(--mist);
}

/* ---------- Team ---------- */

.page-about .team-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-card {
  background: rgba(5, 7, 14, 0.72);
  padding: 22px 18px;
}

.page-about .team-card__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 40px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  color: rgba(234, 246, 255, 0.74);
}

.page-about .team-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--orange);
  font-size: 14px;
  color: rgba(234, 246, 255, 0.8);
}

/* ---------- Partners ---------- */

.page-about .partner-layout {
  display: grid;
  gap: 24px;
}

.page-about .partner-item {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .partner-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .partner-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}

.page-about .partner-item p {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  color: rgba(234, 246, 255, 0.74);
}

/* ---------- Report ---------- */

.page-about .report-list {
  border-top: 1px solid var(--line);
}

.page-about .report-item {
  border-bottom: 1px solid var(--line);
}

.page-about .report-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 800;
  color: var(--white);
}

.page-about .report-item summary::-webkit-details-marker {
  display: none;
}

.page-about .report-item__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
}

.page-about .report-item__mark::before,
.page-about .report-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
}

.page-about .report-item__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .report-item__mark::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
  transition: transform var(--tap) var(--ease), opacity var(--tap) var(--ease);
}

.page-about .report-item[open] .report-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .report-item p {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 14px;
  color: rgba(234, 246, 255, 0.76);
}

/* ---------- Duty ---------- */

.page-about .duty-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: duty;
}

.page-about .duty-steps li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .duty-steps li:first-child {
  border-top: 0;
}

.page-about .duty-steps__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--red);
}

.page-about .duty-steps li p:last-child {
  margin: 0;
  font-size: 15px;
  color: rgba(234, 246, 255, 0.76);
}

.page-about .duty-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border: 2px solid var(--line-red);
  background: rgba(59, 12, 34, 0.4);
  font-size: 14px;
  color: rgba(234, 246, 255, 0.86);
}

/* ---------- CTA ---------- */

.page-about .about-cta {
  margin-top: 46px;
  padding: 32px 20px;
  border: 3px solid var(--cyan);
  box-shadow: var(--shadow-hard);
  background: linear-gradient(135deg, rgba(34, 26, 71, 0.85) 0%, rgba(5, 7, 14, 0.9) 100%);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 5.4vw, 38px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-about .about-cta p {
  margin: 0 0 22px;
  max-width: 56ch;
  font-size: 14px;
  color: rgba(234, 246, 255, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__actions .btn {
  text-decoration: none;
}

/* ---------- Reveal fallback ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- Tablet ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .region-map__cells {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: minmax(120px, 190px) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .timeline__year {
    margin: 0;
  }
}

/* ---------- Desktop ---------- */

@media (min-width: 960px) {
  .page-about .yearbook {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .yb-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
    padding-top: 52px;
  }

  .page-about .yb-rail__label {
    margin: 0 0 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--mist);
  }

  .page-about .yb-index {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .page-about .yb-index__item {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 9px 0 9px 10px;
    border-left: 2px solid transparent;
    font-size: 13px;
    color: var(--mist);
    transition: color var(--tap) var(--ease), border-color var(--tap) var(--ease);
  }

  .page-about .yb-index__item .num {
    font-size: 11px;
    letter-spacing: 0.1em;
    color: rgba(143, 163, 184, 0.7);
  }

  .page-about .yb-index__item:hover,
  .page-about .yb-index__item:focus-visible {
    color: var(--white);
    border-left-color: var(--cyan);
    text-decoration: none;
  }

  .page-about .yb-index__item.is-active {
    color: var(--cyan);
    border-left-color: var(--cyan);
  }

  .page-about .yb-section {
    padding: 58px 0;
  }

  .page-about .yb-section--teal,
  .page-about .yb-section--wine {
    padding-left: 32px;
    padding-right: 32px;
    margin-left: -32px;
    margin-right: -32px;
  }

  .page-about .partner-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-figure--team {
    margin: 0;
    position: sticky;
    top: 110px;
  }

  .page-about .duty-steps li {
    grid-template-columns: 70px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .duty-steps__num {
    font-size: 26px;
  }

  .page-about .about-cta {
    padding: 44px 40px;
  }
}

@media (min-width: 1200px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}