.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 36px);
  padding-bottom: clamp(28px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-about .hero-grid {
  row-gap: clamp(20px, 3.5vw, 40px);
  align-items: end;
}

.page-about .hero-main .kicker {
  margin: 0 0 14px;
}

.page-about .hero-main .display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.6vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.012em;
  margin: 0 0 20px;
  color: var(--ink);
}

.page-about .hero-main .dek {
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.7;
  color: var(--stone);
  margin: 0;
  max-width: 42ch;
}

.page-about .hero-side {
  display: grid;
  gap: 10px;
}

.page-about .hero-side .stat {
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 4px solid var(--field);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .hero-side .stat--track {
  border-left-color: var(--track);
}

.page-about .hero-side .stat--score {
  border-left-color: var(--score);
}

.page-about .hero-side .stat-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 2.2vw, 28px);
  line-height: 1;
  color: var(--ink);
}

.page-about .hero-side .stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--stone);
  letter-spacing: 0.04em;
}

.page-about .hero-strip {
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .hero-figure {
  margin: 0;
  border: 1px solid var(--line);
}

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline-section {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .timeline-grid {
  row-gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .timeline-rail {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .timeline-rail h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 2.6vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--ink);
}

.page-about .rail-note {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--stone);
  margin: 0;
  padding-top: 4px;
  border-top: 1px solid var(--line);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: var(--line-strong);
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 30px 32px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .timeline-mark {
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 13px;
  background: var(--score);
  border: 1px solid var(--ink);
}

.page-about .timeline-time {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--field);
  margin-bottom: 5px;
}

.page-about .timeline-item h3 {
  font-size: clamp(17px, 1.5vw, 21px);
  margin: 0 0 8px;
  line-height: 1.3;
  color: var(--ink);
  font-weight: 700;
}

.page-about .timeline-item p {
  margin: 0;
  color: var(--stone);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-versions {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-versions .kicker {
  color: var(--score);
}

.page-about .about-versions h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.008em;
  margin: 12px 0 16px;
  color: var(--paper);
}

.page-about .about-versions .dek {
  color: rgba(244, 241, 232, 0.72);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.75;
  max-width: 60ch;
  margin: 0;
}

.page-about .version-rail {
  margin-top: clamp(28px, 4vw, 44px);
  margin-bottom: clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line-invert);
  border-bottom: 1px solid var(--line-invert);
}

.page-about .version-rail .track-stop {
  position: relative;
  padding: 16px;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  row-gap: 2px;
  align-items: center;
  border-bottom: 1px solid var(--line-invert);
  transition: background-color 160ms ease;
}

.page-about .version-rail .track-stop:last-child {
  border-bottom: 0;
}

.page-about .version-rail .track-stop strong {
  font-size: 14px;
  color: var(--paper);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .version-rail .track-stop span:not(.ver-badge) {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(244, 241, 232, 0.6);
  line-height: 1.5;
}

.page-about .version-rail .track-stop[data-active] {
  background: linear-gradient(90deg, rgba(14, 122, 75, 0.22), transparent 72%);
}

.page-about .version-rail .track-stop[data-active]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--field);
}

.page-about .ver-badge {
  grid-row: span 2;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  height: 28px;
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  background: rgba(244, 241, 232, 0.08);
  color: var(--paper);
  border: 1px solid var(--line-invert);
}

.page-about .version-rail .track-stop[data-active] .ver-badge {
  background: var(--field);
  border-color: var(--field);
  color: var(--white);
}

.page-about .version-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-invert);
  background: var(--ink-deep);
}

.page-about .version-table-wrap .data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  color: var(--paper);
  font-size: 14px;
}

.page-about .version-table-wrap .data-table th,
.page-about .version-table-wrap .data-table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-invert);
}

.page-about .version-table-wrap .data-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--score);
  background: rgba(242, 183, 5, 0.06);
}

.page-about .version-table-wrap .data-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .version-table-wrap .data-table td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(244, 241, 232, 0.55);
}

.page-about .about-rhythm {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-rhythm h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.8vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.008em;
  margin: 12px 0 16px;
  color: var(--ink);
}

.page-about .rhythm-dek {
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.75;
  color: var(--stone);
  margin: 0;
  max-width: 58ch;
}

.page-about .rhythm-grid {
  margin-top: clamp(24px, 4vw, 42px);
  row-gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .rhythm-main {
  display: grid;
  gap: 0;
}

.page-about .rhythm-item {
  display: grid;
  grid-template-columns: 66px 1fr;
  column-gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .rhythm-item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .rhythm-cadence {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--field);
  align-self: start;
  padding-top: 3px;
}

.page-about .rhythm-item h3 {
  font-size: 17px;
  margin: 0 0 6px;
  line-height: 1.35;
  color: var(--ink);
  font-weight: 700;
}

.page-about .rhythm-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .rhythm-figure {
  margin: 0;
  border: 1px solid var(--line);
}

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

.page-about .about-team {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-team h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.8vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.008em;
  margin: 12px 0 16px;
  color: var(--ink);
}

.page-about .team-grid {
  margin-top: clamp(24px, 4vw, 42px);
  gap: var(--gap);
}

.page-about .team-cell {
  display: flex;
}

.page-about .team-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  height: 100%;
}

.page-about .team-card .idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--clay);
  margin: 0;
}

.page-about .team-card h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0;
  color: var(--ink);
}

.page-about .team-card > p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--stone);
  margin: 0;
}

.page-about .team-card .acc-trigger {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 0 8px;
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.page-about .team-card .acc-sign {
  display: inline-block;
  color: var(--field);
  font-weight: 900;
  font-size: 17px;
  line-height: 1;
  transition: transform 160ms ease;
}

.page-about .team-card .acc-panel {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.page-about .team-card .acc-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .team-card .acc-panel li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--stone);
}

.page-about .team-card .acc-panel li::before {
  content: "›";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--field);
  font-weight: 700;
}

.page-about .about-eco {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-eco .kicker {
  color: var(--score);
}

.page-about .about-eco h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.8vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.008em;
  margin: 12px 0 16px;
  color: var(--paper);
}

.page-about .eco-dek {
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.75;
  color: rgba(244, 241, 232, 0.78);
  margin: 0;
  max-width: 58ch;
}

.page-about .eco-grid {
  margin-top: clamp(24px, 4vw, 42px);
  row-gap: clamp(20px, 3vw, 32px);
  align-items: stretch;
}

.page-about .eco-col {
  background: rgba(16, 27, 46, 0.22);
  border: 1px solid var(--line-invert);
  padding: 22px 20px;
}

.page-about .eco-col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.005em;
  color: var(--score);
}

.page-about .eco-col p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 241, 232, 0.82);
}

.page-about .eco-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(244, 241, 232, 0.7);
}

.page-about .eco-list li {
  position: relative;
  padding-left: 14px;
}

.page-about .eco-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  background: var(--track);
}

.page-about .eco-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  border: 1px solid var(--line-invert);
}

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

@media (min-width: 720px) {
  .page-about .about-rhythm .rhythm-grid {
    grid-template-columns: 1.45fr 1fr;
  }

  .page-about .eco-grid {
    gap: clamp(20px, 3vw, 32px);
  }

  .page-about .team-grid {
    row-gap: var(--gap);
  }
}

@media (min-width: 1024px) {
  .page-about .version-rail {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .version-rail .track-stop {
    border-bottom: 0;
    border-left: 1px solid var(--line-invert);
  }

  .page-about .version-rail .track-stop:first-child {
    border-left: 0;
  }

  .page-about .version-rail .track-stop[data-active]::before {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 3px;
  }
}