.page-about {
  --about-rail-w: 200px;
  --about-section-gap: clamp(44px, 6vw, 88px);
}

.page-about .about-masthead {
  position: relative;
  overflow: hidden;
  padding-block: clamp(36px, 6vw, 76px) clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(160deg, var(--ink) 0%, var(--panel) 68%, var(--pitch) 140%);
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(49, 80, 98, 0.4) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(49, 80, 98, 0.4) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 72%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 72%);
}

.page-about .about-masthead__inner {
  position: relative;
  max-width: 1040px;
}

.page-about .about-masthead__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.2vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 18ch;
}

.page-about .about-masthead__lede {
  margin: 22px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-masthead__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  border: 1px solid var(--rule);
  background: var(--rule);
}

.page-about .about-masthead__stat {
  margin: 0;
  padding: 16px 18px;
  background: rgba(6, 24, 32, 0.86);
}

.page-about .about-masthead__stat dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-dim);
}

.page-about .about-masthead__stat dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-stat__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-book {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
  padding-block: clamp(34px, 5vw, 64px) clamp(56px, 8vw, 104px);
}

.page-about .about-rail__label {
  margin: 0 0 10px;
  color: var(--mist-dim);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid var(--rule);
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .about-rail__link .mono {
  font-size: 11px;
  color: var(--amber);
  letter-spacing: 0.08em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--signal);
  outline: none;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-section + .about-section {
  margin-top: var(--about-section-gap);
  padding-top: clamp(26px, 3.5vw, 44px);
  border-top: 1px solid var(--rule);
}

.page-about .about-section__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-section__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 24ch;
}

.page-about .about-section__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--paper);
}

.page-about .about-section p {
  margin: 16px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-section p.about-section__lede {
  margin-top: 18px;
  color: var(--paper);
}

.page-about .about-figure {
  margin: clamp(26px, 3.5vw, 40px) 0 0;
  border: 1px solid var(--rule);
  background: var(--panel);
}

.page-about .about-figure--narrow {
  max-width: 520px;
}

.page-about .about-figure .media-frame__caption {
  padding: 12px 14px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist-dim);
}

.page-about .about-timeline {
  position: relative;
  margin: clamp(26px, 3.5vw, 40px) 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom, var(--pitch), var(--rule) 78%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 3vw, 34px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--amber);
  background: var(--ink);
}

.page-about .about-timeline__item:first-child::before {
  background: var(--amber);
}

.page-about .about-timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: 0.04em;
  color: var(--amber);
  line-height: 1;
}

.page-about .about-timeline__title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  border: 1px solid var(--rule);
  background: var(--rule);
}

.page-about .about-team__cell {
  padding: 22px 20px;
  background: var(--panel);
  border-left: 2px solid transparent;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .about-team__cell:hover,
.page-about .about-team__cell:focus-within {
  background: var(--pitch);
  border-left-color: var(--amber);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-team__name {
  margin: 10px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__desc {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-cadence {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3vw, 34px) 0 0;
}

.page-about .about-cadence__item {
  padding: 18px 18px 20px;
  border: 1px solid var(--rule);
  border-top: 2px solid var(--signal);
  background: var(--panel);
}

.page-about .about-cadence__time {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--signal);
}

.page-about .about-cadence__label {
  margin: 12px 0 0;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-cadence__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-record {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 18px 20px 20px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--amber);
  background: var(--void);
}

.page-about .about-record__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

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

.page-about .about-record__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 18px;
  padding-bottom: 9px;
  margin-bottom: 9px;
  border-bottom: 1px dashed var(--rule);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
}

.page-about .about-record__row:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: none;
}

.page-about .about-record__key {
  color: var(--mist-dim);
}

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

.page-about .about-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(22px, 3vw, 30px) 0 0;
}

.page-about .about-filter__btn {
  padding: 8px 13px;
  border: 1px solid var(--rule);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .about-filter__btn:hover {
  border-color: var(--signal);
  color: var(--paper);
}

.page-about .about-filter__btn[aria-pressed="true"] {
  background: var(--pitch);
  border-color: var(--pitch);
  color: var(--paper);
}

.page-about .about-scenes {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--rule);
  background: var(--rule);
}

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

.page-about .about-scene[hidden] {
  display: none;
}

.page-about .about-scene__tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-scene__title {
  margin: 8px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scene__text {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-next {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  border: 1px solid var(--rule);
  background: var(--rule);
}

.page-about .about-next__card {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 4px;
  padding: 18px 20px;
  background: var(--panel);
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  background: var(--pitch);
  outline: none;
}

.page-about .about-next__index {
  grid-row: span 2;
  align-self: center;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-next__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-next__card:hover .about-next__desc {
  color: var(--paper);
}

@media (min-width: 560px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 640px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .page-about .about-cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    border: 1px solid var(--rule);
    background: var(--rule);
  }

  .page-about .about-cadence__item {
    border: none;
    border-top: 2px solid var(--signal);
  }
}

@media (min-width: 900px) {
  .page-about .about-book {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 72px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 30px);
    padding-left: 16px;
    border-left: 1px solid var(--rule);
  }

  .page-about .about-rail__label {
    margin-bottom: 14px;
  }

  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__item + .about-rail__item {
    margin-top: 2px;
  }

  .page-about .about-rail__link {
    display: flex;
    padding: 9px 0;
    border: none;
    border-bottom: 1px solid transparent;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-bottom-color: var(--amber);
  }

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

@media (min-width: 1080px) {
  .page-about .about-figure--narrow {
    margin-left: clamp(0px, 6vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-team__cell,
  .page-about .about-filter__btn,
  .page-about .about-next__card {
    transition: none;
  }
}
<<<END>>>