.page-about {
  background: var(--paper);
  color: var(--ink);
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-block: 22px 2px;
  font-size: 14px;
  color: var(--rock);
}

.page-about .breadcrumb-item {
  color: var(--rock);
  text-decoration: none;
}

.page-about a.breadcrumb-item:hover,
.page-about a.breadcrumb-item:focus-visible {
  color: var(--teal);
}

.page-about .breadcrumb-sep {
  color: var(--silver);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 3vw, 40px) clamp(40px, 6vw, 84px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 26px;
}

.page-about .about-hero-title {
  margin: 14px 0 0;
  font-size: clamp(34px, 5.4vw, 62px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-about .about-hero-lead {
  margin-top: 18px;
  max-width: 62ch;
}

.page-about .hero-fact-card {
  background: var(--sand);
  border: 1px solid rgba(36, 31, 26, 0.12);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .fact-card-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-about .fact-list {
  margin: 0;
}

.page-about .fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  justify-content: space-between;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(36, 31, 26, 0.22);
}

.page-about .fact-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .fact-label {
  font-size: 14px;
  color: var(--rock);
  margin: 0;
}

.page-about .fact-value {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  text-align: right;
}

/* ---------- Rail layout ---------- */
.page-about .rail-layout {
  padding-bottom: clamp(48px, 6vw, 88px);
  min-width: 0;
}

.page-about .rail-content {
  min-width: 0;
}

.page-about .index-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 10px 16px;
  scrollbar-width: thin;
}

.page-about .rail-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 15px;
  border-radius: var(--pill);
  border: 1px solid rgba(107, 106, 100, 0.32);
  background: rgba(223, 205, 169, 0.36);
  color: var(--rock);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--ink);
  border-color: var(--cyan);
}

.page-about .rail-link.is-current {
  color: var(--ink);
  border-color: var(--rust);
}

.page-about .rail-year {
  font-size: 12px;
  color: var(--rock);
  letter-spacing: 0.06em;
}

.page-about .rail-link.is-current .rail-year {
  color: var(--rust);
}

/* ---------- Sections ---------- */
.page-about .about-section {
  padding-block: clamp(40px, 6vw, 76px);
  border-top: 1px solid rgba(107, 106, 100, 0.22);
}

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

.page-about .section-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .section-num {
  flex: 0 0 auto;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--rust);
  letter-spacing: -0.02em;
}

.page-about .section-desc {
  max-width: 72ch;
  margin-bottom: 22px;
  color: var(--rock);
}

/* ---------- Origin ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 26px;
}

.page-about .origin-copy p {
  margin-top: 0;
}

.page-about .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .origin-figure {
  margin: 0;
}

/* ---------- Creed ---------- */
.page-about .creed-section {
  position: relative;
}

.page-about .creed-statement {
  font-size: clamp(26px, 4.2vw, 48px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 clamp(24px, 3vw, 40px);
  max-width: 24ch;
}

.page-about .creed-statement em {
  font-style: normal;
  color: var(--teal);
}

.page-about .creed-notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .creed-note {
  background: rgba(159, 216, 196, 0.2);
  border: 1px solid rgba(4, 107, 112, 0.22);
  border-radius: var(--radius-md);
  padding: 20px 22px;
}

.page-about .creed-note-num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .creed-note p {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--rock);
}

/* ---------- Series ---------- */
.page-about .series-block {
  margin-top: clamp(28px, 4vw, 46px);
  background: var(--sand);
  border: 1px solid rgba(36, 31, 26, 0.1);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 34px);
}

.page-about .series-intro {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15px;
  color: var(--rock);
}

.page-about .series-map {
  display: block;
  width: 100%;
  height: auto;
  max-width: 760px;
  margin: 0 auto 22px;
}

.page-about .series-map-axis,
.page-about .series-map-link {
  stroke: rgba(107, 106, 100, 0.45);
  stroke-width: 1;
}

.page-about .series-map-node rect {
  fill: rgba(245, 239, 227, 0.85);
  stroke: var(--teal);
  stroke-width: 1;
}

.page-about .series-map text {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  fill: var(--ink);
}

.page-about .series-map .series-map-sub {
  font-size: 14px;
  font-weight: 400;
  fill: var(--rock);
}

.page-about .series-map-core {
  fill: var(--night);
}

.page-about .series-map text.series-map-core-text {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 500;
  fill: var(--cyan);
}

.page-about .series-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .series-node {
  background: var(--paper);
  border: 1px solid rgba(4, 107, 112, 0.24);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .series-node:hover,
.page-about .series-node:focus {
  transform: translateY(-3px);
  border-color: var(--cyan);
  box-shadow: 0 12px 26px rgba(36, 31, 26, 0.1);
  outline: none;
}

.page-about .series-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .series-node-name {
  margin: 0;
  font-weight: 700;
  font-size: 16px;
}

.page-about .series-node-note {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin-top var(--dur) var(--ease);
}

.page-about .series-node:hover .series-node-note,
.page-about .series-node:focus .series-node-note {
  max-height: 160px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- Scale ---------- */
.page-about .scale-band {
  background: var(--sand);
  border: 1px solid rgba(36, 31, 26, 0.1);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 40px);
}

.page-about .scale-lead {
  margin: 0;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 500;
  line-height: 1.7;
  max-width: 62ch;
}

.page-about .stat-grid {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .stat-item {
  background: rgba(245, 239, 227, 0.76);
  border: 1px solid rgba(36, 31, 26, 0.08);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.page-about .stat-figure {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .stat-figure span {
  font-size: 0.5em;
  font-weight: 500;
  margin-left: 3px;
  color: var(--rock);
}

.page-about .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--rock);
}

.page-about .response-notice {
  margin-top: 22px;
  border-left: 3px solid var(--rust);
}

.page-about .response-notice p {
  margin: 6px 0 0;
}

/* ---------- Timeline ---------- */
.page-about .track-figure {
  margin: 0 0 26px;
}

.page-about .timeline-band {
  position: relative;
  background: var(--night);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 3.4vw, 44px);
  overflow: hidden;
}

.page-about .timeline-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 0%, rgba(0, 200, 206, 0.16), transparent 52%),
    radial-gradient(circle at 92% 100%, rgba(210, 84, 42, 0.14), transparent 46%);
  pointer-events: none;
}

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

.page-about .timeline-node {
  position: relative;
  padding: 0 0 26px 28px;
  border-left: 1px solid rgba(198, 203, 207, 0.32);
}

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

.page-about .timeline-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-about .timeline-dot {
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(159, 216, 196, 0.16);
}

.page-about .timeline-node--now .timeline-dot {
  background: var(--rust);
  box-shadow: 0 0 0 4px rgba(210, 84, 42, 0.24);
}

.page-about .timeline-time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .timeline-node .h3 {
  margin: 4px 0 0;
}

.page-about .timeline-detail {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin-top var(--dur) var(--ease);
}

.page-about .timeline-node:hover .timeline-detail,
.page-about .timeline-node:focus .timeline-detail {
  max-height: 180px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- Team ---------- */
.page-about .team-grid {
  display: grid;
  gap: 26px;
}

.page-about .team-copy p {
  margin-top: 0;
}

.page-about .team-figure {
  margin: 0;
}

.page-about .role-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .role-item {
  border: 1px solid rgba(107, 106, 100, 0.28);
  border-left: 3px solid var(--mint);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  background: rgba(223, 205, 169, 0.2);
}

.page-about .role-item .card-text {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--rock);
}

/* ---------- Revamp ---------- */
.page-about .revamp-panel {
  background: var(--night);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3.2vw, 42px);
  position: relative;
  overflow: hidden;
}

.page-about .revamp-panel::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 200, 206, 0));
}

.page-about .revamp-lead {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .revamp-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .revamp-item {
  border: 1px solid rgba(198, 203, 207, 0.28);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  background: rgba(245, 239, 227, 0.05);
}

.page-about .revamp-item-title {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .revamp-item .h3 {
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .revamp-item p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .revamp-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .revamp-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
  max-width: 68ch;
}

/* ---------- Next step ---------- */
.page-about .next-step {
  margin-top: clamp(36px, 5vw, 64px);
  display: grid;
  gap: 12px;
  align-items: center;
  background: rgba(223, 205, 169, 0.42);
  border: 1px solid rgba(36, 31, 26, 0.12);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 30px);
}

.page-about .next-step-num {
  font-size: 26px;
  color: var(--rust);
  line-height: 1;
}

.page-about .next-step-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.page-about .next-step-text {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--rock);
}

.page-about .next-step-link {
  justify-self: start;
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--pill);
  background: var(--ink);
  color: var(--paper);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .next-step-link:hover,
.page-about .next-step-link:focus-visible {
  background: var(--cyan);
  color: var(--ink);
}

/* ---------- Responsive ---------- */
@media (min-width: 700px) {
  .page-about .creed-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .next-step {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .page-about .next-step-link {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(28px, 4vw, 52px);
  }
}

@media (min-width: 1000px) {
  .page-about .rail-layout {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-about .index-rail {
    display: block;
    position: sticky;
    top: 104px;
    overflow: visible;
    padding: 0 0 0 16px;
    border-left: 1px solid rgba(107, 106, 100, 0.32);
  }

  .page-about .rail-link {
    position: relative;
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 9px 0 9px 12px;
    border: 0;
    background: none;
    border-radius: 0;
    white-space: normal;
  }

  .page-about .rail-link::before {
    content: "";
    position: absolute;
    left: -17px;
    top: 7px;
    bottom: 7px;
    width: 2px;
    border-radius: 2px;
    background: transparent;
    transition: background var(--dur) var(--ease);
  }

  .page-about .rail-link:hover::before,
  .page-about .rail-link:focus-visible::before {
    background: var(--cyan);
  }

  .page-about .rail-link.is-current::before {
    background: var(--rust);
  }

  .page-about .rail-label {
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .series-node,
  .page-about .series-node-note,
  .page-about .timeline-detail,
  .page-about .rail-link,
  .page-about .next-step-link {
    transition-duration: 120ms;
    transition-property: opacity, color, background-color, border-color;
  }

  .page-about .series-node:hover,
  .page-about .series-node:focus {
    transform: none;
  }
}