.page-about {
  background: var(--ink);
  color: var(--snow);
  overflow-x: hidden;
}

.page-about .section {
  padding: 56px 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-head {
  max-width: 640px;
  margin-bottom: 32px;
}

.page-about .about-head--wide {
  max-width: 820px;
}

.page-about .about-head h2 {
  margin: 10px 0 14px;
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--snow);
}

.page-about .about-head__lede {
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 38em;
}

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

.page-about .about-hero {
  padding: 32px 0 56px;
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 8px 8px;
  opacity: 0.35;
  pointer-events: none;
  mask-image: radial-gradient(120% 80% at 80% 0%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(120% 80% at 80% 0%, #000 0%, transparent 70%);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__lead h1 {
  margin: 12px 0 0;
  font-size: 34px;
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--snow);
}

.page-about .about-quote {
  margin: 22px 0 0;
  padding: 4px 0 4px 16px;
  border-left: 3px solid var(--cyan);
  font-size: 19px;
  line-height: 1.6;
  color: var(--snow);
}

.page-about .about-hero__intro {
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 34em;
}

.page-about .about-figures {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-figure {
  background: var(--ink-2);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-figure__num {
  font-size: 32px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .about-figure__num em {
  font-style: normal;
  font-size: 15px;
  color: var(--mist);
  margin-left: 2px;
}

.page-about .about-figure__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--grid);
  position: relative;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(53, 240, 192, 0.28);
  pointer-events: none;
}

.page-about .about-hero__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(0.55) brightness(0.85);
}

/* ---------- roles ---------- */

.page-about .ratio-bar {
  display: flex;
  height: 22px;
  border: 1px solid var(--grid);
  margin-bottom: 8px;
  overflow: hidden;
}

.page-about .ratio-bar__seg {
  display: block;
  height: 100%;
  transform-origin: left center;
  animation: about-bar-in 700ms var(--ease) both;
}

.page-about .ratio-bar__seg + .ratio-bar__seg {
  border-left: 1px solid var(--ink);
}

.page-about .ratio-bar__seg--edit {
  flex: 9;
  background: var(--cyan);
  animation-delay: 40ms;
}

.page-about .ratio-bar__seg--eng {
  flex: 7;
  background: var(--amber);
  animation-delay: 100ms;
}

.page-about .ratio-bar__seg--ops {
  flex: 6;
  background: var(--orange);
  animation-delay: 160ms;
}

.page-about .ratio-bar__seg--audit {
  flex: 4;
  background: var(--iron);
  animation-delay: 220ms;
}

@keyframes about-bar-in {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.page-about .role-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .role {
  background: var(--ink-2);
  padding: 20px 18px 22px;
  position: relative;
  transition: background 160ms var(--ease);
}

.page-about .role:hover {
  background: #12271f;
}

.page-about .role__dot {
  display: block;
  width: 10px;
  height: 10px;
  margin-bottom: 12px;
}

.page-about .role__dot--edit { background: var(--cyan); }
.page-about .role__dot--eng { background: var(--amber); }
.page-about .role__dot--ops { background: var(--orange); }
.page-about .role__dot--audit { background: var(--iron); }

.page-about .role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

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

.page-about .role__count {
  font-size: 14px;
  color: var(--cyan);
  white-space: nowrap;
}

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

/* ---------- chain ---------- */

.page-about .chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .chain__step {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--grid);
  padding: 20px 18px 18px;
  outline: none;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .chain__step::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 16px;
  height: 16px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  opacity: 0;
  transition: opacity 160ms var(--ease);
}

.page-about .chain__step:hover,
.page-about .chain__step:focus-visible,
.page-about .chain__step:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .chain__step:hover::after,
.page-about .chain__step:focus-within::after {
  opacity: 1;
}

.page-about .chain__no {
  display: block;
  font-size: 12px;
  color: var(--orange);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.page-about .chain__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--snow);
}

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

.page-about .chain__detail {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan);
  transition: max-height 320ms var(--ease), opacity 240ms var(--ease), margin-top 320ms var(--ease);
}

.page-about .chain__step:hover .chain__detail,
.page-about .chain__step:focus-within .chain__detail {
  max-height: 200px;
  opacity: 1;
  margin-top: 12px;
}

.page-about .about-chain__media {
  margin: 28px 0 0;
  border: 1px solid var(--grid);
}

.page-about .about-chain__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.5) brightness(0.82);
}

.page-about .about-inline-link {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-inline-link a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 61, 0.45);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

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

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--grid);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 32px 16px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 10px;
  width: 9px;
  height: 1px;
  background: var(--grid);
}

.page-about .timeline__node {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  padding: 2px 0;
}

.page-about .timeline__dot {
  position: absolute;
  left: -23px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--amber);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 1px var(--amber);
  transition: background 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .timeline__item:target .timeline__dot,
.page-about .timeline__node:hover .timeline__dot,
.page-about .timeline__node:focus-visible .timeline__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan), 0 0 12px rgba(53, 240, 192, 0.55);
}

.page-about .timeline__year {
  font-size: 22px;
  line-height: 1;
  color: var(--snow);
  letter-spacing: 0.02em;
}

.page-about .timeline__node:hover .timeline__year,
.page-about .timeline__item:target .timeline__year {
  color: var(--cyan);
}

.page-about .timeline__body {
  margin-top: 12px;
}

.page-about .timeline__body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .timeline__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 36em;
}

.page-about .about-timeline__media {
  margin: 20px 0 0;
  border: 1px solid var(--grid);
}

.page-about .about-timeline__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.45) brightness(0.8);
}

/* ---------- cadence ---------- */

.page-about .about-cadence__strip {
  margin: 0 0 28px;
  border: 1px solid var(--grid);
}

.page-about .cadence-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .cadence-note {
  background: var(--ink-2);
  padding: 20px 18px 22px;
}

.page-about .cadence-note h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .cadence-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- sources ---------- */

.page-about .sources-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .source-card {
  border: 1px solid var(--grid);
  background: var(--ink-2);
  padding: 20px 18px 22px;
  position: relative;
}

.page-about .source-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 3px;
  background: var(--amber);
}

.page-about .source-card__no {
  display: block;
  font-size: 40px;
  line-height: 1;
  color: var(--amber);
  margin-bottom: 12px;
}

.page-about .source-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}

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

.page-about .source-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.page-about .source-rules li {
  position: relative;
  padding: 14px 0 14px 22px;
  border-bottom: 1px solid var(--grid);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .source-rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- feedback ---------- */

.page-about .feedback-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .feedback-step {
  border: 1px solid var(--grid);
  border-left: 3px solid var(--orange);
  background: var(--ink-2);
  padding: 18px 18px 20px;
}

.page-about .feedback-step__no {
  display: block;
  font-size: 13px;
  color: var(--orange);
  margin-bottom: 8px;
  letter-spacing: 0.08em;
}

.page-about .feedback-step h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .feedback-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-cta {
  margin-top: 28px;
  padding: 24px 20px;
  border: 1px solid var(--cyan);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  background: rgba(53, 240, 192, 0.04);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--snow);
}

.page-about .about-cta .btn {
  text-decoration: none;
}

.page-about .about-note {
  margin: 24px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--iron);
}

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

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

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

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

  .page-about .feedback-step {
    border: none;
    border-left: 3px solid var(--orange);
  }

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

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

  .page-about .source-card {
    border: none;
  }

  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .page-about .section {
    padding: 88px 0;
  }

  .page-about .about-hero {
    padding: 48px 0 88px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__lead h1 {
    font-size: 56px;
  }

  .page-about .about-quote {
    font-size: 22px;
    padding-left: 20px;
  }

  .page-about .about-head {
    margin-bottom: 44px;
  }

  .page-about .about-head h2 {
    font-size: 40px;
  }

  .page-about .about-head__lede {
    font-size: 17px;
  }

  .page-about .about-figure__num {
    font-size: 44px;
  }

  .page-about .about-figure {
    padding: 22px 20px;
  }

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

  .page-about .chain {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-chain__media {
    margin-top: 36px;
  }

  .page-about .timeline {
    padding-left: 28px;
  }

  .page-about .timeline__item {
    padding-left: 40px;
    padding-bottom: 44px;
  }

  .page-about .timeline__item::before {
    left: -28px;
    width: 16px;
  }

  .page-about .timeline__dot {
    left: -32px;
  }

  .page-about .timeline {
    max-width: 920px;
  }

  .page-about .about-timeline__media {
    margin-top: 24px;
    max-width: 620px;
  }

  .page-about .timeline__year {
    font-size: 30px;
  }

  .page-about .about-cadence__strip {
    margin-bottom: 36px;
  }

  .page-about .source-card__no {
    font-size: 52px;
  }

  .page-about .about-cta {
    padding: 32px 36px;
  }

  .page-about .about-note {
    margin-top: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ratio-bar__seg {
    animation: none;
  }

  .page-about .chain__step,
  .page-about .chain__detail,
  .page-about .role,
  .page-about .timeline__dot {
    transition-duration: 120ms;
  }

  .page-about .chain__step:hover,
  .page-about .chain__step:focus-within {
    transform: none;
  }

  .page-about .chain__step .chain__detail {
    max-height: 200px;
    opacity: 1;
    margin-top: 12px;
  }
}
<<<END>>>