.page-about {
  --about-rail-w: 176px;
  --about-ink-line: rgba(220, 214, 200, .16);
  background: var(--paper);
  color: var(--text);
  overflow-x: clip;
}

.page-about .crumbs {
  padding-top: clamp(18px, 2.4vw, 30px);
  padding-bottom: clamp(10px, 1.4vw, 18px);
  font-size: 13px;
}

.page-about .crumbs a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .crumbs a:hover {
  color: var(--copper);
}

.page-about .crumbs__sep {
  margin: 0 8px;
  color: var(--grid);
}

.page-about .crumbs [aria-current="page"] {
  color: var(--ink-900);
}

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

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper);
  padding: clamp(38px, 5.5vw, 76px) 0 clamp(38px, 5.5vw, 72px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(220, 214, 200, .07) 1px, transparent 1px),
    linear-gradient(180deg, rgba(220, 214, 200, .07) 1px, transparent 1px);
  background-size: 76px 76px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(46%, 460px);
  height: 100%;
  background: linear-gradient(150deg, rgba(184, 122, 60, .3), rgba(184, 122, 60, 0) 66%);
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: end;
}

.page-about .about-hero .eyebrow {
  margin: 0 0 14px;
  color: var(--copper-light);
}

.page-about .about-hero .display {
  margin: 0 0 20px;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 56ch;
  color: rgba(246, 242, 233, .8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-facts {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid rgba(220, 214, 200, .26);
}

.page-about .about-facts dt {
  padding-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--copper-light);
}

.page-about .about-facts dd {
  margin: 0;
  padding: 3px 0 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: rgba(246, 242, 233, .88);
  border-bottom: 1px solid rgba(220, 214, 200, .12);
}

/* ---------- .page-about grid ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 52px);
  padding: clamp(36px, 5vw, 72px) 0 clamp(20px, 3vw, 40px);
}

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

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-about .rail-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--grid);
}

.page-about .rail-index__link {
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: baseline;
  gap: 6px;
  padding: 9px 0 9px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .rail-index__link:hover,
.page-about .rail-index__link:focus-visible {
  color: var(--ink-900);
  border-left-color: var(--copper);
}

.page-about .rail-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--copper);
}

/* ---------- chapters ---------- */

.page-about .about-chapter {
  padding: clamp(34px, 5vw, 64px) 0;
  border-top: 1px solid var(--grid);
}

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

.page-about .about-chapter__head {
  max-width: 64ch;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.page-about .about-chapter__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--copper);
}

.page-about .about-chapter .serif-title {
  margin: 0 0 14px;
  color: var(--ink-900);
}

.page-about .about-chapter__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-chapter--ink {
  background: var(--ink-900);
  color: var(--paper);
  box-shadow: 0 0 0 100vmax var(--ink-900);
  clip-path: inset(0 -100vmax);
  border-top-color: transparent;
  padding-left: 0;
  padding-right: 0;
  margin-top: clamp(10px, 2vw, 24px);
  margin-bottom: clamp(10px, 2vw, 24px);
}

.page-about .about-chapter--ink .about-chapter__kicker {
  color: var(--copper-light);
}

.page-about .about-chapter--ink .serif-title {
  color: var(--paper);
}

.page-about .about-chapter--ink .about-chapter__lede {
  color: rgba(246, 242, 233, .78);
}

/* ---------- team board ---------- */

.page-about .team-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--white);
  border: 1px solid var(--grid);
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  border-color: var(--copper);
}

.page-about .team-card__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1;
  color: var(--copper);
}

.page-about .team-card__unit {
  margin: 6px 0 14px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .team-card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-about .team-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-about .team-card__foot {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--grid);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .team-card--arch {
  background: var(--ink-900);
  border-color: var(--ink-700);
}

.page-about .team-card--arch .team-card__no {
  color: var(--copper-light);
}

.page-about .team-card--arch .team-card__unit {
  color: rgba(246, 242, 233, .6);
}

.page-about .team-card--arch .team-card__title {
  color: var(--paper);
}

.page-about .team-card--arch .team-card__desc {
  color: rgba(246, 242, 233, .8);
}

.page-about .team-card--arch .team-card__foot {
  border-top-color: rgba(220, 214, 200, .2);
  color: rgba(246, 242, 233, .62);
}

/* ---------- figures ---------- */

.page-about .about-figure {
  margin: clamp(26px, 3.4vw, 44px) 0 0;
}

.page-about .media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: var(--white);
}

.page-about .media--diagram {
  aspect-ratio: 3 / 2;
}

.page-about .media--timeline {
  aspect-ratio: 7 / 3;
}

.page-about .media--square {
  aspect-ratio: 1 / 1;
  border-color: rgba(220, 214, 200, .5);
}

.page-about .media__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media__caption {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- flow ---------- */

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: flow;
}

.page-about .flow-step {
  border-top: 1px solid var(--about-ink-line);
}

.page-about .flow-steps > li:last-child .flow-step {
  border-bottom: 1px solid var(--about-ink-line);
}

.page-about .flow-step > summary {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 20px 2px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .flow-step > summary::after {
  content: "＋";
  font-size: 15px;
  color: var(--copper-light);
  transition: transform var(--ease);
}

.page-about .flow-step[open] > summary::after {
  transform: rotate(45deg);
}

.page-about .flow-step > summary:focus-visible {
  outline: 1px solid var(--copper);
  outline-offset: 2px;
}

.page-about .flow-step__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--copper-light);
}

.page-about .flow-step__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .flow-step__cycle {
  display: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .flow-step__body {
  padding: 0 2px 24px 48px;
}

.page-about .flow-step__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(246, 242, 233, .78);
}

.page-about .flow-step__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper-light);
}

/* ---------- timeline ---------- */

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

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 0 0 30px 22px;
  border-left: 1px solid var(--grid);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--paper);
  border: 1px solid var(--copper);
}

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

.page-about .timeline__item--now::before {
  background: var(--signal);
  border-color: var(--signal);
}

.page-about .timeline__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 28px);
  line-height: 1;
  color: var(--copper);
}

.page-about .timeline__year--now {
  color: var(--signal);
}

.page-about .timeline__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-about .timeline__card p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- region ---------- */

.page-about .region-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 40px);
  align-items: start;
}

.page-about .region-grid .about-figure {
  margin: 0;
}

.page-about .region-text__lead {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-900);
}

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

.page-about .region-list li {
  padding: 14px 0;
  border-top: 1px solid var(--grid);
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
}

.page-about .region-list__k {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--copper);
}

.page-about .response-board {
  margin-top: clamp(26px, 3.4vw, 44px);
  padding: clamp(22px, 2.8vw, 34px);
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .response-board__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .response-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .response-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid rgba(220, 214, 200, .16);
}

.page-about .response-list li:last-child {
  border-bottom: 1px solid rgba(220, 214, 200, .16);
}

.page-about .response-list__num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--copper-light);
}

.page-about .response-list__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 242, 233, .78);
}

/* ---------- trust ---------- */

.page-about .trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .trust-card {
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--white);
  border: 1px solid var(--grid);
  border-left: 2px solid var(--celadon);
}

.page-about .trust-card__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .trust-card__v {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--ink-900);
  word-break: break-word;
}

.page-about .trust-card__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .trust-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .trust-note a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 122, 60, .4);
}

.page-about .trust-note a:hover {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* ---------- partners ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .partner-block {
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--white);
  border: 1px solid var(--grid);
}

.page-about .partner-block--ink {
  background: var(--ink-700);
  border-color: var(--ink-700);
  color: var(--paper);
}

.page-about .partner-block__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-about .partner-block--ink .partner-block__title {
  color: var(--paper);
}

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

.page-about .partner-list li {
  padding: 12px 0 12px 18px;
  border-top: 1px solid var(--grid);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  position: relative;
}

.page-about .partner-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 6px;
  height: 1px;
  background: var(--copper);
}

.page-about .partner-list li:first-child::before {
  top: 8px;
}

.page-about .partner-block p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(246, 242, 233, .82);
}

.page-about .partner-block__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--copper-light);
}

.page-about .partner-honor {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--copper-light);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-900);
}

/* ---------- closing ---------- */

.page-about .about-closing {
  margin-top: clamp(30px, 4vw, 60px);
  padding: clamp(44px, 6vw, 84px) 0 clamp(50px, 7vw, 96px);
  background: var(--ink-900);
  color: var(--paper);
  box-shadow: 0 0 0 100vmax var(--ink-900);
  clip-path: inset(0 -100vmax);
}

.page-about .about-closing__inner {
  max-width: 62ch;
}

.page-about .about-closing .eyebrow {
  margin: 0 0 14px;
  color: var(--copper-light);
}

.page-about .about-closing .serif-title {
  margin: 0 0 16px;
  color: var(--paper);
}

.page-about .about-closing p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(246, 242, 233, .8);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- responsive ---------- */

@media (min-width: 560px) {
  .page-about .flow-step > summary {
    grid-template-columns: 38px minmax(0, 1fr) auto auto;
  }

  .page-about .flow-step__cycle {
    display: block;
  }

  .page-about .response-list li {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }
}

@media (min-width: 640px) {
  .page-about .team-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .timeline__item {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 26px;
    padding-left: 26px;
  }

  .page-about .timeline__year {
    margin: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .region-grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: clamp(28px, 4vw, 52px);
  }

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

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    align-self: start;
  }

  .page-about .team-board {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .team-card--arch { grid-column: span 7; }
  .page-about .team-card--fe { grid-column: span 5; }
  .page-about .team-card--cs { grid-column: span 5; }
  .page-about .team-card--ops { grid-column: span 7; }
}

@media (min-width: 1140px) {
  .page-about .trust-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .rail-index__link,
  .page-about .flow-step > summary::after {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }
}
<<<END>>>
</final_output>