.page-about {
  --about-pad-y: clamp(56px, 8vw, 120px);
  --about-rule: 1px solid var(--line);
}

.page-about .about-hero {
  position: relative;
  background:
    repeating-linear-gradient(90deg, rgba(41, 224, 194, .07) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(41, 224, 194, .05) 0 1px, transparent 1px 96px),
    var(--ink-900);
  color: var(--on-dark-strong);
  padding: calc(var(--header-h) + clamp(28px, 5vw, 72px)) 0 0;
  overflow: hidden;
}

.page-about .about-crumb {
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(245, 242, 234, .55);
}

.page-about .about-crumb-item + .about-crumb-item::before {
  content: "/";
  margin-right: 10px;
  color: rgba(245, 242, 234, .3);
}

.page-about .about-crumb-link {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .about-crumb-link:hover {
  text-decoration: underline;
}

.page-about .about-crumb-current {
  color: rgba(245, 242, 234, .8);
}

.page-about .about-hero-grid {
  align-items: start;
}

.page-about .about-hero-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 14px 0 0;
  color: var(--paper-white);
}

.page-about .about-hero-lead {
  max-width: 46ch;
  margin: clamp(20px, 3vw, 32px) 0 0;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: rgba(245, 242, 234, .78);
}

.page-about .about-hero .btn-row {
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-about .about-hero-side {
  display: none;
}

.page-about .about-hero-vnote {
  color: rgba(41, 224, 194, .7);
  line-height: 2.2;
  margin: 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(41, 224, 194, .18);
  border-top: 1px solid rgba(41, 224, 194, .3);
  margin-top: clamp(40px, 6vw, 72px);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 18px;
  background: var(--ink-900);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  letter-spacing: -.01em;
}

.page-about .about-stat-label {
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(245, 242, 234, .6);
}

.page-about .chapter {
  padding: var(--about-pad-y) 0;
}

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

.page-about .chapter--white {
  background: var(--paper-white);
  color: var(--ink);
}

.page-about .chapter--dark {
  background: var(--ink-800);
  color: var(--on-dark-strong);
}

.page-about .chapter-rail {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .chapter-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 700;
  line-height: .9;
  color: var(--teal);
  letter-spacing: -.03em;
}

.page-about .chapter-num--dark {
  color: var(--cyan);
}

.page-about .chapter-vnote {
  color: var(--muted);
  letter-spacing: .16em;
  padding-top: 4px;
}

.page-about .chapter-vnote--dark {
  color: rgba(245, 242, 234, .5);
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.16;
  letter-spacing: -.015em;
  margin: 0 0 18px;
}

.page-about .chapter-title--dark {
  color: var(--paper-white);
}

.page-about .chapter-body .lead {
  max-width: 52ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 20px;
}

.page-about .chapter-body .lead--dark {
  color: rgba(245, 242, 234, .78);
}

.page-about .chapter-text {
  max-width: 58ch;
  line-height: 1.85;
  color: var(--muted);
  margin: 0 0 32px;
}

.page-about .origin-points {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .origin-point {
  background: var(--paper-white);
  padding: 20px 20px 22px;
}

.page-about .origin-point-title {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
  position: relative;
  padding-left: 14px;
}

.page-about .origin-point-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 7px;
  height: 7px;
  background: var(--orange);
}

.page-about .origin-point p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .team-dots {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
  max-width: 280px;
  margin: 0 0 16px;
}

.page-about .team-dot {
  aspect-ratio: 1;
  background: var(--line);
  display: block;
}

.page-about .team-dot--data { background: var(--teal); }
.page-about .team-dot--content { background: var(--orange); }
.page-about .team-dot--tech { background: var(--ink-700); }

.page-about .team-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: 30px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .team-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .team-legend-swatch {
  width: 10px;
  height: 10px;
  display: inline-block;
}

.page-about .team-legend-swatch--data { background: var(--teal); }
.page-about .team-legend-swatch--content { background: var(--orange); }
.page-about .team-legend-swatch--tech { background: var(--ink-700); }

.page-about .about-tabs {
  border-top: var(--about-rule);
  padding-top: 20px;
}

.page-about .about-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-tablist .tab {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  min-height: 44px;
  cursor: pointer;
  border-radius: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-tablist .tab[aria-selected="true"] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--cyan);
}

.page-about .about-tablist .tab:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.page-about .about-tabpanel-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .about-tabpanel p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .team-figure,
.page-about .time-figure,
.page-about .principle-figure {
  margin-top: 32px;
}

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

.page-about .checks-flow {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 16px;
  counter-reset: none;
}

.page-about .check-step {
  position: relative;
  background: var(--paper-white);
  border: var(--about-rule);
  border-left: 3px solid var(--teal);
  padding: 20px 20px 22px;
}

.page-about .check-step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
  display: block;
  margin-bottom: 8px;
}

.page-about .check-step-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about .check-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .tip {
  font-size: 15px;
  line-height: 1.85;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 4px;
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 12px 6px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 14px;
  width: 9px;
  height: 9px;
  background: var(--line);
  border: 1px solid var(--paper-white);
}

.page-about .timeline-item--key::before {
  background: var(--orange);
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--paper-white);
  background: var(--ink-800);
  padding: 4px 12px 4px 10px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-about .version {
  border-bottom: 1px solid var(--line);
}

.page-about .version-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .version-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--teal);
  line-height: 1;
}

.page-about .version[open] .version-summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .timeline-version {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-about .version-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

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

.page-about .version-body p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .columns-list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .column-card {
  display: block;
  background: var(--paper-white);
  padding: 22px 20px 24px;
  text-decoration: none;
  color: inherit;
  transition: background var(--dur) var(--ease);
}

.page-about .column-card:hover,
.page-about .column-card:focus-visible {
  background: var(--ink-900);
}

.page-about .column-card:hover .column-card-title,
.page-about .column-card:focus-visible .column-card-title {
  color: var(--cyan);
}

.page-about .column-card:hover p,
.page-about .column-card:focus-visible p {
  color: rgba(245, 242, 234, .72);
}

.page-about .column-card:hover .column-card-freq,
.page-about .column-card:focus-visible .column-card-freq {
  color: var(--orange);
}

.page-about .column-card-title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
  transition: color var(--dur) var(--ease);
}

.page-about .column-card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-about .column-card-freq {
  color: var(--teal);
  letter-spacing: .14em;
}

.page-about .reach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(41, 224, 194, .16);
  margin: 0 0 34px;
  border-top: 1px solid rgba(41, 224, 194, .3);
}

.page-about .reach-stat {
  background: var(--ink-800);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .reach-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-about .reach-stat-label {
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(245, 242, 234, .55);
}

.page-about .reach-coop {
  border-top: 1px solid rgba(41, 224, 194, .3);
  padding-top: 26px;
}

.page-about .reach-coop-title {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--paper-white);
}

.page-about .reach-coop p {
  max-width: 54ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 242, 234, .72);
}

.page-about .principles {
  display: grid;
  gap: 18px;
  border-top: var(--about-rule);
  padding-top: 24px;
}

.page-about .principle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 16px;
  align-items: baseline;
}

.page-about .principle-key {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--paper-white);
  background: var(--ink-800);
  padding: 5px 9px;
  writing-mode: horizontal-tb;
}

.page-about .principle-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--ink);
}

.page-about .principle p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cta {
  background:
    repeating-linear-gradient(90deg, rgba(41, 224, 194, .06) 0 1px, transparent 1px 88px),
    var(--ink-900);
  color: var(--on-dark-strong);
  padding: clamp(52px, 8vw, 110px) 0;
}

.page-about .about-cta-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.8vw, 44px);
  line-height: 1.14;
  letter-spacing: -.015em;
  margin: 12px 0 18px;
  color: var(--paper-white);
}

.page-about .about-cta-text {
  max-width: 52ch;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 242, 234, .75);
}

.page-about .about-cta-side {
  margin-top: 34px;
  border-top: 1px solid rgba(41, 224, 194, .3);
  padding-top: 22px;
}

.page-about .about-contact-line {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(245, 242, 234, .12);
}

.page-about .about-contact-line .contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(245, 242, 234, .45);
}

.page-about .about-contact-line .contact-value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  word-break: break-all;
}

.page-about .about-cta-side .contact-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 242, 234, .55);
}

@media (min-width: 620px) {
  .page-about .origin-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero-side {
    display: block;
    padding-top: 8px;
  }

  .page-about .about-hero-vnote {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    height: 260px;
    margin-left: auto;
    border-left: 1px solid rgba(41, 224, 194, .3);
    padding-left: 12px;
  }

  .page-about .chapter-rail {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 0;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .chapter-vnote {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    height: 190px;
    padding-top: 0;
    padding-right: 6px;
    border-right: 1px solid var(--line);
  }

  .page-about .chapter-vnote--dark {
    border-right-color: rgba(41, 224, 194, .3);
  }

  .page-about .team-figure,
  .page-about .time-figure,
  .page-about .principle-figure {
    margin-top: 0;
  }

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

  .page-about .principle {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .page-about .principle-key {
    grid-row: auto;
    justify-self: start;
    margin-bottom: 12px;
  }

  .page-about .about-cta-side {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
    border-left: 1px solid rgba(41, 224, 194, .3);
    padding-left: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .column-card,
  .page-about .column-card-title,
  .page-about .column-card p,
  .page-about .about-tablist .tab {
    transition: none;
  }
}
<<<END>>>