.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  padding-bottom: 8px;
}

.page-about .crumbs {
  padding: 18px 0 0;
}

.page-about .about-hero {
  padding: 18px 0 34px;
  border-bottom: var(--rule);
  margin-bottom: 28px;
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--indigo);
  margin: 12px 0 0;
  max-width: 20em;
}

.page-about .about-hero__lede {
  margin: 16px 0 0;
  font-size: var(--fs-3);
  line-height: 1.8;
  color: var(--ink);
  max-width: 40em;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 26px 0 0;
  background: var(--sand);
  border: var(--rule);
}

.page-about .about-fact {
  background: var(--paper-light);
  padding: 14px 16px;
}

.page-about .about-fact dt {
  font-size: var(--fs-1);
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-about .about-fact dd {
  margin: 6px 0 0;
  font-size: var(--fs-6);
  line-height: 1.1;
  color: var(--indigo);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact dd em {
  font-style: normal;
  font-size: var(--fs-2);
  color: var(--ink-soft);
  margin-left: 6px;
}

.page-about .about-main {
  padding-bottom: 40px;
}

.page-about .about-index {
  border-left: 3px solid var(--indigo);
  padding: 4px 0 4px 16px;
  margin-bottom: 28px;
}

.page-about .about-index__eyebrow {
  margin: 0 0 12px;
  color: var(--ink-soft);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: var(--fs-2);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.page-about .about-index__num {
  color: var(--ink-soft);
  font-size: var(--fs-1);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--indigo);
  border-bottom-color: var(--orange);
}

.page-about .about-index__link:hover .about-index__num,
.page-about .about-index__link:focus-visible .about-index__num {
  color: var(--indigo);
}

.page-about .about-index__hint {
  margin: 16px 0 0;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--ink-soft);
  display: none;
}

.page-about .about-sec {
  padding: 30px 0 34px;
  border-bottom: var(--rule);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about .about-sec--last {
  border-bottom: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .about-sec__num {
  font-size: var(--fs-2);
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  flex: none;
}

.page-about .about-sec__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--fs-5);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--indigo);
  margin: 0;
}

.page-about .about-prose p {
  margin: 0 0 14px;
  font-size: var(--fs-3);
  line-height: 1.8;
}

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

.page-about .about-prose a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 1px;
}

.page-about .about-prose a:hover,
.page-about .about-prose a:focus-visible {
  color: var(--orange);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

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

.page-about .figure {
  margin: 22px 0 0;
}

.page-about .figure__media {
  overflow: hidden;
  background: var(--paper-light);
  border: var(--rule);
  border-radius: var(--radius);
}

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

.page-about .figure__caption {
  margin-top: 8px;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .numdemo {
  margin-top: 26px;
  padding: 20px 16px;
  background: var(--paper-light);
  border: var(--rule);
  border-radius: var(--radius);
}

.page-about .numdemo__title {
  margin: 0 0 14px;
  font-size: var(--fs-1);
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.page-about .numdemo__radio {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.page-about .numdemo__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .numdemo__tab {
  cursor: pointer;
  font-size: var(--fs-2);
  padding: 6px 12px;
  border: 1px solid var(--sand);
  border-radius: 999px;
  color: var(--ink);
  background: var(--paper);
  transition: border-color 0.15s var(--ease), color 0.15s var(--ease), background 0.15s var(--ease);
}

.page-about .numdemo__tab:hover {
  border-color: var(--indigo);
  color: var(--indigo);
}

.page-about #nd-family:checked ~ .numdemo__tabs .numdemo__tab[for="nd-family"],
.page-about #nd-enterprise:checked ~ .numdemo__tabs .numdemo__tab[for="nd-enterprise"],
.page-about #nd-school:checked ~ .numdemo__tabs .numdemo__tab[for="nd-school"] {
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--paper-light);
}

.page-about #nd-family:focus-visible ~ .numdemo__tabs .numdemo__tab[for="nd-family"],
.page-about #nd-enterprise:focus-visible ~ .numdemo__tabs .numdemo__tab[for="nd-enterprise"],
.page-about #nd-school:focus-visible ~ .numdemo__tabs .numdemo__tab[for="nd-school"] {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

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

.page-about #nd-family:checked ~ .numdemo__panels .numdemo__panel:nth-child(1),
.page-about #nd-enterprise:checked ~ .numdemo__panels .numdemo__panel:nth-child(2),
.page-about #nd-school:checked ~ .numdemo__panels .numdemo__panel:nth-child(3) {
  display: block;
  animation: about-fade 0.16s var(--ease) both;
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-about .numdemo__line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-4);
  font-variant-numeric: tabular-nums;
}

.page-about .nr-piece {
  padding: 6px 10px;
  border-radius: var(--radius);
  letter-spacing: 0.06em;
}

.page-about .nr-piece--code {
  background: var(--indigo);
  color: var(--paper-light);
}

.page-about .nr-piece--year {
  background: var(--slate);
  color: var(--paper-light);
}

.page-about .nr-piece--serial {
  background: var(--orange);
  color: var(--paper-light);
}

.page-about .nr-dash {
  color: var(--ink-soft);
}

.page-about .numdemo__note {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-quote {
  margin: 26px 0 0;
  padding: 28px 20px;
  background: var(--indigo-deep);
  border-radius: var(--radius);
  color: var(--paper-light);
}

.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-4);
  line-height: 1.7;
  max-width: 26em;
  border-left: 2px solid var(--orange);
  padding-left: 16px;
}

.page-about .about-quote__meta {
  margin: 16px 0 0 18px;
  font-size: var(--fs-1);
  letter-spacing: 0.1em;
  color: rgba(251, 247, 238, 0.72);
}

.page-about .about-tl__intro {
  margin: 0 0 22px;
  font-size: var(--fs-3);
  line-height: 1.8;
  max-width: 34em;
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--sand);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 24px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .tl__year {
  margin: 0;
  font-size: var(--fs-2);
  color: var(--indigo);
  letter-spacing: 0.08em;
}

.page-about .tl__name {
  margin: 4px 0 6px;
  font-family: var(--font-serif);
  font-size: var(--fs-4);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}

.page-about .tl__desc {
  margin: 0;
  font-size: var(--fs-2);
  line-height: 1.75;
  color: var(--ink);
  max-width: 34em;
}

.page-about .tl__note {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--ink-soft);
  border-left: 2px solid transparent;
  padding-left: 0;
  transition: max-height 0.2s var(--ease), opacity 0.2s var(--ease), padding-left 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tl__item:hover .tl__note,
.page-about .tl__item:focus-within .tl__note {
  max-height: 6em;
  opacity: 1;
  margin-top: 8px;
  padding-left: 10px;
  border-left-color: var(--orange);
}

.page-about .about-tl__more {
  margin: 6px 0 0;
  font-size: var(--fs-2);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-tl__more a {
  color: var(--indigo);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
}

.page-about .about-inline-figure {
  margin-top: 22px;
}

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

  .page-about .about-hero__title {
    font-size: var(--fs-7);
    line-height: 1.18;
  }

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

  .page-about .numdemo {
    padding: 24px 22px;
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.75fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-split__figure {
    margin: 6px 0 0;
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .about-sec__title {
    font-size: var(--fs-6);
  }

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

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

  .page-about .about-index__link {
    display: flex;
    width: 100%;
  }

  .page-about .tl {
    padding-left: 96px;
  }

  .page-about .tl::before {
    left: 62px;
  }

  .page-about .tl__item::before {
    left: -34px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    padding: 8px 0 8px 18px;
  }

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

  .page-about .about-sec {
    padding: 40px 0 44px;
  }

  .page-about .about-quote {
    margin: 34px 0 0;
    padding: 48px 40px;
  }

  .page-about .about-quote__text {
    font-size: var(--fs-5);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .numdemo__panel,
  .page-about .tl__note,
  .page-about .about-index__link,
  .page-about .numdemo__tab {
    animation: none;
    transition: none;
  }
}
<<<END>>>