.page-about {
  --about-rail: 210px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-wrap: break-word;
}

.page-about .about-top {
  background: var(--paper);
  padding: calc(var(--header-h) + 14px) 0 0;
}

.page-about .crumbs {
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--gray);
  display: flex;
  gap: 8px;
  align-items: center;
  font-family: var(--font-narrow);
  text-transform: uppercase;
}

.page-about .crumbs a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .24s var(--ease), color .24s var(--ease);
}

.page-about .crumbs a:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}

/* ---------- hero ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(34px, 5vw, 64px) 0 clamp(44px, 7vw, 88px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(0, 229, 255, .055) 0 1px, transparent 1px 48px);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -38%;
  width: 540px;
  height: 540px;
  background: radial-gradient(circle, rgba(230, 57, 70, .3), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
  align-items: end;
}

.page-about .about-hero .eyebrow {
  font-family: var(--font-narrow);
  font-size: .74rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 18px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 6.4vw, 4.3rem);
  line-height: 1.08;
  letter-spacing: .01em;
  margin: 0 0 22px;
  color: var(--paper);
}

.page-about .about-hero .lede {
  font-size: clamp(.95rem, 1.15vw, 1.06rem);
  line-height: 1.9;
  color: rgba(246, 241, 231, .82);
  max-width: 62ch;
  margin: 0 0 clamp(26px, 3.4vw, 40px);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 12px;
  border-top: 1px solid var(--line-ink);
  padding-top: 22px;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-hero__num {
  font-family: var(--font-data);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--paper);
  letter-spacing: -.02em;
}

.page-about .about-hero__num em {
  font-style: normal;
  font-size: .48em;
  margin-left: 3px;
  color: var(--amber);
}

.page-about .about-hero__cap {
  font-family: var(--font-narrow);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(246, 241, 231, .58);
}

/* hero chapter index */

.page-about .about-index {
  border-top: 1px solid var(--line-ink);
  padding-top: 18px;
  min-width: 0;
}

.page-about .about-index__label,
.page-about .about-rail__label {
  font-family: var(--font-narrow);
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gray);
  margin: 0 0 12px;
}

.page-about .about-hero .about-index__label {
  color: rgba(246, 241, 231, .5);
}

.page-about .about-index__list,
.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-ink);
  color: var(--paper);
  text-decoration: none;
  font-size: .92rem;
  transition: color .24s var(--ease), padding-left .24s var(--ease);
}

.page-about .about-index__list a:hover {
  color: var(--cyan);
  padding-left: 5px;
}

.page-about .about-index__list span {
  font-family: var(--font-data);
  font-size: .74rem;
  color: var(--red);
  letter-spacing: .04em;
}

/* ---------- .page-about layout ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  padding-top: clamp(34px, 5vw, 76px);
  padding-bottom: clamp(46px, 6vw, 96px);
}

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

.page-about .about-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  color: var(--gray);
  text-decoration: none;
  font-size: .86rem;
  border-bottom: 1px solid var(--line);
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-rail__list a:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}

.page-about .about-rail__list span {
  font-family: var(--font-data);
  font-size: .7rem;
  color: var(--red);
}

.page-about .about-rail__note {
  margin: 18px 0 0;
  font-size: .76rem;
  line-height: 1.7;
  color: var(--gray);
  border-left: 2px solid var(--red);
  padding-left: 12px;
}

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

/* ---------- sections ---------- */

.page-about .about-sec {
  position: relative;
  padding: clamp(32px, 4.4vw, 64px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-about .about-sec--slanted::before {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  top: 0;
  height: 1px;
  background: var(--line);
  transform: rotate(-1.1deg);
  transform-origin: left center;
}

.page-about .about-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 2.6vw, 34px);
}

.page-about .chapter-no {
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--red);
  margin: 0;
}

.page-about .about-sec h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.42rem, 3.2vw, 2.3rem);
  line-height: 1.24;
  margin: 0;
  max-width: 22ch;
}

.page-about .about-prose p {
  margin: 0 0 1.05em;
  font-size: clamp(.96rem, 1.05vw, 1.06rem);
  line-height: 1.92;
  color: #2c2a26;
  max-width: 64ch;
}

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

/* figures */

.page-about .about-figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
  border: 1px solid var(--line);
  background: var(--cool);
  box-shadow: var(--shadow-1);
  max-width: 100%;
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: .76rem;
  line-height: 1.6;
  color: var(--gray);
  letter-spacing: .02em;
}

/* callout */

.page-about .about-callout {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 18px 20px;
  background: var(--cool);
  border-left: 3px solid var(--amber);
}

.page-about .about-callout__label {
  font-family: var(--font-narrow);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 8px;
}

.page-about .about-callout p:last-child {
  margin: 0;
  font-size: .94rem;
  line-height: 1.85;
  color: #3a3833;
  max-width: 62ch;
}

/* timeline */

.page-about .about-timeline {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline > li {
  position: relative;
}

.page-about .about-timeline > li::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--red);
}

.page-about .about-timeline > li:first-child::before {
  background: var(--red);
}

.page-about .about-timeline details > summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 0;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline details > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__year {
  font-family: var(--font-data);
  font-size: 1.02rem;
  color: var(--red);
  letter-spacing: .02em;
  flex: none;
}

.page-about .about-timeline__name {
  font-size: .98rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
}

.page-about .about-timeline__mark {
  margin-left: auto;
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
  align-self: center;
}

.page-about .about-timeline__mark::before,
.page-about .about-timeline__mark::after {
  content: "";
  position: absolute;
  background: var(--gray);
  transition: transform .3s var(--ease), background .3s var(--ease);
}

.page-about .about-timeline__mark::before {
  left: 0;
  right: 0;
  top: 6.5px;
  height: 1px;
}

.page-about .about-timeline__mark::after {
  top: 0;
  bottom: 0;
  left: 6.5px;
  width: 1px;
}

.page-about .about-timeline details[open] .about-timeline__mark::after {
  transform: scaleY(0);
}

.page-about .about-timeline details[open] .about-timeline__mark::before {
  background: var(--red);
}

.page-about .about-timeline__panel {
  padding: 0 0 16px;
}

.page-about .about-timeline__panel p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.88;
  color: #3a3833;
  max-width: 62ch;
}

/* figures grid */

.page-about .about-figures {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 14px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-about .about-figures li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-figures b {
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -.02em;
}

.page-about .about-figures span {
  font-family: var(--font-narrow);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gray);
}

/* flow */

.page-about .about-flow {
  margin: clamp(28px, 3.6vw, 44px) 0 0;
}

.page-about .about-flow__label {
  font-family: var(--font-narrow);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gray);
  margin: 0 0 16px;
}

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

.page-about .about-flow__list li {
  display: flex;
  gap: 14px;
  background: var(--paper);
  padding: 16px 16px;
  align-items: flex-start;
}

.page-about .about-flow__no {
  font-family: var(--font-data);
  font-size: .8rem;
  color: var(--cyan);
  background: var(--ink);
  padding: 2px 7px;
  flex: none;
  line-height: 1.6;
}

.page-about .about-flow__list h3 {
  margin: 0 0 4px;
  font-size: .98rem;
  font-weight: 700;
  font-family: var(--font-body);
  color: var(--ink);
}

.page-about .about-flow__list p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--gray);
}

/* coverage */

.page-about .about-coverage {
  margin: clamp(24px, 3vw, 34px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-coverage__item {
  background: var(--paper);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-coverage__kicker {
  font-family: var(--font-narrow);
  font-size: .66rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--red);
  margin: 0;
}

.page-about .about-coverage__item b {
  font-family: var(--font-data);
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -.02em;
}

.page-about .about-coverage__item span {
  font-size: .8rem;
  color: var(--gray);
}

/* partners */

.page-about .about-partners {
  margin: clamp(24px, 3vw, 34px) 0 0;
  display: grid;
  gap: 20px;
}

.page-about .about-partners__col {
  border-top: 2px solid var(--ink);
  padding-top: 12px;
}

.page-about .about-partners__kicker {
  font-family: var(--font-narrow);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--red);
  margin: 0 0 8px;
}

.page-about .about-partners__col p:last-child {
  margin: 0;
  font-size: .9rem;
  line-height: 1.85;
  color: #3a3833;
}

/* inline link */

.page-about .about-inline-link {
  margin: clamp(20px, 2.6vw, 28px) 0 0;
  font-size: .9rem;
  color: var(--gray);
}

.page-about .about-inline-link a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--red);
  padding-bottom: 1px;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-inline-link a:hover {
  color: var(--red-dark);
  border-bottom-color: var(--cyan);
}

/* pc section on ink */

.page-about .about-sec--ink {
  background: var(--ink);
  color: var(--paper);
  border-top: 0;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: clamp(30px, 4.4vw, 56px) clamp(20px, 3vw, 40px);
}

.page-about .about-sec--ink h2 {
  color: var(--paper);
}

.page-about .about-sec--ink .chapter-no {
  color: var(--cyan);
}

.page-about .about-sec--ink .about-prose p {
  color: rgba(246, 241, 231, .8);
}

.page-about .about-pc {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
  border-top: 1px solid var(--line-ink);
  padding-top: 22px;
}

.page-about .about-pc li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-pc b {
  font-family: var(--font-data);
  font-size: .98rem;
  color: var(--amber);
  letter-spacing: .02em;
}

.page-about .about-pc span {
  font-size: .82rem;
  line-height: 1.7;
  color: rgba(246, 241, 231, .66);
}

.page-about .about-inline-link--ink {
  color: rgba(246, 241, 231, .62);
}

.page-about .about-inline-link--ink a {
  color: var(--paper);
  border-bottom-color: var(--cyan);
}

.page-about .about-inline-link--ink a:hover {
  color: var(--cyan);
  border-bottom-color: var(--red);
}

/* next */

.page-about .about-next {
  margin-top: clamp(38px, 5vw, 68px);
  border-top: 1px solid var(--line);
  padding-top: clamp(24px, 3vw, 36px);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  margin: 0 0 18px;
}

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

.page-about .about-next__list a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px;
  background: var(--paper);
  text-decoration: none;
  transition: background .24s var(--ease);
}

.page-about .about-next__list a:hover {
  background: var(--cool);
}

.page-about .about-next__kicker {
  font-family: var(--font-narrow);
  font-size: .7rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--red);
}

.page-about .about-next__desc {
  font-size: .88rem;
  line-height: 1.7;
  color: #3a3833;
}

/* ---------- media queries ---------- */

@media (min-width: 560px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 4vw, 56px);
  }

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

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

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

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

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 84px);
  }

  .page-about .about-rail {
    display: block;
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-about .about-sec h2 {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-timeline__mark::before,
  .page-about .about-timeline__mark::after,
  .page-about .about-next__list a {
    transition: none;
  }
}
<<<END>>>