.page-about {
  --about-track: 2px;
  --about-dot-x: -26px;
  position: relative;
  padding-bottom: clamp(48px, 7vw, 104px);
}

.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(6px, 1.4vw, 12px);
}

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

.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  padding-top: clamp(14px, 2.4vw, 28px);
  padding-bottom: clamp(32px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__rail {
  display: none;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: var(--display-xl);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: .015em;
  color: var(--ink);
  max-width: 12em;
}

.page-about .about-hero__lede {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 62ch;
  color: var(--ink-soft);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__fact {
  background: var(--bg);
  padding: 16px 18px 18px;
}

.page-about .about-hero__fact-label {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-dim);
}

.page-about .about-hero__fact-num {
  margin: 6px 0 0;
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1;
  color: var(--ink);
}

/* ---------- Sticky index ---------- */

.page-about .about-index {
  position: sticky;
  top: var(--header-h);
  z-index: 5;
  background: var(--bg-deep);
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__list {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0 var(--gutter);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: block;
  padding: 14px 16px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  white-space: nowrap;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--accent-new);
}

.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--accent-new);
  outline-offset: -2px;
}

/* ---------- Section head ---------- */

.page-about .about-head {
  max-width: 72ch;
}

.page-about .about-head__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: var(--display-l);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  color: var(--ink-soft);
  line-height: 1.8;
}

.page-about .about-note {
  margin-top: clamp(24px, 3.4vw, 38px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-dim);
  line-height: 1.8;
}

.page-about .about-note a,
.page-about .fit-list__val a,
.page-about .steps__body a,
.page-about .about-team__cadence a {
  color: var(--accent-new);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 225, 208, .35);
  transition: border-color .2s var(--ease);
}

.page-about .about-note a:hover,
.page-about .fit-list__val a:hover,
.page-about .steps__body a:hover,
.page-about .about-team__cadence a:hover {
  border-bottom-color: var(--accent-new);
}

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

.page-about .about-line__figure {
  margin: clamp(28px, 4vw, 44px) 0 clamp(30px, 4.4vw, 52px);
}

.page-about .about-fit__figure {
  margin: clamp(26px, 3.6vw, 40px) 0 clamp(24px, 3.4vw, 36px);
}

.page-about .about-team__figure {
  margin: clamp(22px, 3.2vw, 34px) 0;
}

/* ---------- Vertical version timeline ---------- */

.page-about .vline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .vline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: var(--about-track);
  background: linear-gradient(180deg, var(--accent-old) 0%, rgba(86, 105, 154, .5) 50%, var(--accent-new) 100%);
  opacity: .6;
}

.page-about .vline__item {
  position: relative;
}

.page-about .vline__item + .vline__item {
  margin-top: 10px;
}

.page-about .vline__item::before {
  content: "";
  position: absolute;
  left: var(--about-dot-x);
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-old);
  box-shadow: 0 0 0 5px rgba(242, 160, 61, .13);
  transition: box-shadow .25s var(--ease);
}

.page-about .vline__item--new::before {
  background: var(--accent-new);
  box-shadow: 0 0 0 5px rgba(53, 225, 208, .13);
}

.page-about .vline__node {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(30, 44, 85, .5), rgba(10, 17, 41, .82));
  transition: border-color .25s var(--ease);
}

.page-about .vline__node:hover {
  border-color: var(--line-strong);
}

.page-about .vline__node[open] {
  border-color: var(--line-strong);
}

.page-about .vline__summary {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 24px) clamp(16px, 2.2vw, 24px);
  cursor: pointer;
  list-style: none;
}

.page-about .vline__summary::-webkit-details-marker {
  display: none;
}

.page-about .vline__summary:focus-visible {
  outline: 2px solid var(--accent-new);
  outline-offset: -2px;
}

.page-about .vline__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.page-about .vline__stage,
.page-about .vline__period,
.page-about .vline__meta {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-dim);
}

.page-about .vline__item--new .vline__stage {
  color: var(--accent-new);
}

.page-about .vline__item--legacy .vline__stage {
  color: var(--accent-old);
}

.page-about .vline__title {
  font-family: var(--font-display);
  font-size: var(--display-m);
  font-weight: 700;
  line-height: 1.28;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-about .vline__meta {
  position: relative;
  padding-right: 20px;
}

.page-about .vline__meta::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -1px;
  font-size: 14px;
  color: var(--ink-soft);
  transition: transform .25s var(--ease);
}

.page-about .vline__node[open] .vline__meta::after {
  content: "–";
}

.page-about .vline__body {
  padding: clamp(16px, 2.2vw, 24px);
  border-top: 1px solid var(--line);
  background-image:
    linear-gradient(rgba(199, 210, 232, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 210, 232, .05) 1px, transparent 1px);
  background-size: 28px 28px;
}

.page-about .vline__lead {
  margin: 0 0 18px;
  color: var(--ink-soft);
  line-height: 1.8;
  max-width: 66ch;
}

.page-about .vline__fields {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .vline__field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 14px;
  background: rgba(10, 17, 41, .78);
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.page-about .vline__field-key {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink);
}

/* ---------- Fit comparison ---------- */

.page-about .fit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .fit-col {
  border: 1px solid var(--line);
  background: var(--bg-deep);
}

.page-about .fit-col--legacy {
  border-top: 3px solid var(--accent-old);
}

.page-about .fit-col--new {
  border-top: 3px solid var(--accent-new);
}

.page-about .fit-col__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 2.4vw, 26px);
  border-bottom: 1px solid var(--line);
}

.page-about .fit-col__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--display-m);
  font-weight: 700;
  line-height: 1.24;
  color: var(--ink);
}

.page-about .fit-list {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line);
}

.page-about .fit-list__key {
  padding: 12px clamp(18px, 2.4vw, 26px) 4px;
  background: var(--bg-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-dim);
}

.page-about .fit-list__val {
  margin: 0;
  padding: 0 clamp(18px, 2.4vw, 26px) 16px;
  background: var(--bg-deep);
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- Steps ---------- */

.page-about .steps {
  display: grid;
  gap: 1px;
  margin: clamp(26px, 3.6vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  counter-reset: step;
}

.page-about .steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 24px);
  background: var(--bg);
}

.page-about .steps__num {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--accent-new);
  padding-top: 3px;
}

.page-about .steps__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.page-about .steps__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 70ch;
}

.page-about .about-callout {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--alert);
  background: rgba(255, 107, 107, .05);
}

.page-about .about-callout p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 74ch;
}

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

.page-about .about-team__main {
  min-width: 0;
}

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

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 24px);
}

.page-about .team-card .card__kicker {
  color: var(--accent-new);
}

.page-about .team-card .card__title {
  font-size: 17px;
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-team__cadence {
  margin-top: clamp(24px, 3.4vw, 36px);
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--line);
  max-width: 74ch;
}

.page-about .about-team__cadence-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: var(--display-m);
  font-weight: 700;
  line-height: 1.24;
  color: var(--ink);
}

.page-about .about-team__cadence p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-team__cadence p:last-child {
  margin-bottom: 0;
}

/* ---------- Milestones ---------- */

.page-about .milestones {
  display: grid;
  gap: 18px;
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .milestones__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-left: 16px;
  border-left: 2px solid var(--accent-old);
}

.page-about .milestones__item--new {
  border-left-color: var(--accent-new);
}

.page-about .milestones__year {
  font-size: 20px;
  letter-spacing: .1em;
  color: var(--ink);
}

.page-about .milestones__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .milestones__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 60ch;
}

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

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  margin-top: clamp(34px, 5vw, 60px);
  padding: clamp(24px, 3.4vw, 40px) clamp(20px, 3vw, 40px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(242, 160, 61, .1), transparent 58%),
    radial-gradient(120% 140% at 100% 100%, rgba(53, 225, 208, .12), transparent 58%),
    var(--bg-deep);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--display-m);
  font-weight: 700;
  line-height: 1.24;
  color: var(--ink);
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 60ch;
}

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

/* ---------- Responsive ---------- */

@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .fit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .milestones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 28px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 32px;
  }

  .page-about .vline__field {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-dot-x: -42px;
  }

  .page-about .about-hero {
    grid-template-columns: 112px minmax(0, 1fr);
    column-gap: clamp(24px, 3.4vw, 48px);
  }

  .page-about .about-hero__rail {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 14px;
    border-left: 1px solid var(--line);
  }

  .page-about .about-hero__rail-text {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .36em;
    color: var(--ink-dim);
    text-transform: uppercase;
  }

  .page-about .vline {
    padding-left: 56px;
  }

  .page-about .vline::before {
    left: 19px;
  }
}

@media (min-width: 1100px) {
  .page-about .milestones {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .vline__node,
  .page-about .vline__item::before,
  .page-about .vline__meta::after {
    transition: none;
  }
}