.page-about {
  --ab-axis-w: 120px;
  --ab-pad: clamp(48px, 7vw, 96px);
  background: var(--sand-100);
  color: var(--ink-900);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  padding-block: 28px var(--ab-pad);
  background-image:
    repeating-linear-gradient(to right, rgba(20, 17, 15, .07) 0 1px, transparent 1px 25%);
  border-bottom: var(--border-heavy);
}

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

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-weight: 250;
  font-size: clamp(36px, 8.6vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 15em;
}

.page-about .ab-hero__lead {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-600);
  max-width: 34em;
  margin: 24px 0 0;
  border-left: 3px solid var(--teal-700);
  padding-left: 18px;
}

.page-about .ab-hero__index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 34px;
  max-width: 24em;
}

.page-about .ab-hero__index-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 16px;
  border: var(--border-heavy);
  background: var(--paper);
  color: var(--ink-900);
  text-decoration: none;
  box-shadow: var(--shadow-hard);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}

.page-about .ab-hero__index-item:hover,
.page-about .ab-hero__index-item:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
  background: var(--ember-200);
}

.page-about .ab-hero__index-num {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--ember-600);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-hero__index-text {
  font-size: 16px;
  font-weight: 600;
}

.page-about .ab-hero__figure {
  margin: 0;
  border: var(--border-heavy);
  background: var(--sand-050);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-about .ab-hero__figure figcaption {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-600);
  padding: 10px 14px;
  border-top: 1px solid var(--ink-900);
  line-height: 1.6;
}

/* ---------- Shared section rhythm ---------- */
.page-about .ab-section {
  padding-block: var(--ab-pad);
  border-bottom: var(--rule);
}

.page-about .ab-section .section-rule {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .ab-section p {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-600);
  margin: 0 0 16px;
  max-width: 36em;
}

/* ---------- 01 call ---------- */
.page-about .ab-call__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .ab-call__lead {
  font-size: 19px !important;
  color: var(--ink-900) !important;
  border-bottom: 1px solid rgba(20, 17, 15, .2);
  padding-bottom: 16px;
}

.page-about .ab-call__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  border: var(--border-heavy);
  background: var(--sand-050);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-call__fact {
  padding: 18px 16px;
  border-bottom: 1px solid rgba(20, 17, 15, .2);
}

.page-about .ab-call__fact:nth-child(odd) {
  border-right: 1px solid rgba(20, 17, 15, .2);
}

.page-about .ab-call__fact:nth-last-child(-n+2) {
  border-bottom: 0;
}

.page-about .ab-call__fact dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-600);
  margin-bottom: 8px;
}

.page-about .ab-call__fact dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  color: var(--ink-900);
}

/* ---------- 02 timeline ---------- */
.page-about .ab-timeline__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 48px);
}

.page-about .ab-axis {
  display: none;
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--teal-700);
}

.page-about .ab-node {
  position: relative;
  padding: 18px 18px 18px 20px;
  margin-bottom: 16px;
  background: var(--paper);
  border: var(--border-heavy);
  box-shadow: var(--shadow-hard);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .ab-node:hover,
.page-about .ab-node:focus-within,
.page-about .ab-node:focus {
  transform: translate(4px, 0);
  box-shadow: var(--shadow-hard-lg);
  outline: none;
}

.page-about .ab-node:focus-visible {
  outline: 3px solid var(--teal-700);
  outline-offset: 3px;
}

.page-about .ab-node__dot {
  position: absolute;
  left: -32px;
  top: 24px;
  width: 12px;
  height: 12px;
  background: var(--ink-900);
  border: 2px solid var(--sand-100);
}

.page-about .ab-node__year {
  font-family: var(--font-sans) !important;
  font-size: 12px !important;
  letter-spacing: .1em;
  color: var(--ember-600) !important;
  margin: 0 0 6px !important;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-node__title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--ink-900);
}

.page-about .ab-node__text {
  font-size: 15px !important;
  line-height: 1.75 !important;
  margin: 0 !important;
}

.page-about .ab-node__peek {
  font-family: var(--font-sans) !important;
  font-size: 12px !important;
  letter-spacing: .04em;
  color: var(--teal-700) !important;
  margin: 0 !important;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .22s var(--ease), opacity .22s var(--ease), margin-top .22s var(--ease);
}

.page-about .ab-node:hover .ab-node__peek,
.page-about .ab-node:focus .ab-node__peek,
.page-about .ab-node:focus-within .ab-node__peek {
  max-height: 80px;
  opacity: 1;
  margin-top: 10px !important;
}

.page-about .ab-timeline__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: var(--border-heavy);
  background: var(--sand-300);
  box-shadow: var(--shadow-hard);
  position: relative;
}

.page-about .ab-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 9 / 5;
  mix-blend-mode: multiply;
}

.page-about .ab-timeline__figure figcaption {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-600);
  padding: 10px 14px;
  border-top: 1px solid var(--ink-900);
}

/* ---------- 03 versions ---------- */
.page-about .ab-versions {
  background: var(--sand-050);
}

.page-about .ab-versions__intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 36px);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .ab-versions__lead {
  font-size: 18px !important;
  color: var(--ink-900) !important;
}

.page-about .ab-versions__tips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-versions__tips li {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-600);
  padding-left: 20px;
  position: relative;
}

.page-about .ab-versions__tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--teal-700);
}

.page-about .ab-table-wrap {
  border: var(--border-heavy);
  box-shadow: var(--shadow-hard);
  background: var(--paper);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 620px;
  font-family: var(--font-sans);
  font-size: 14px;
}

.page-about .ab-table thead th {
  background: var(--sand-300);
  font-size: 12px;
  letter-spacing: .08em;
  text-align: left;
  padding: 12px 14px;
  border-bottom: var(--border-heavy);
  white-space: nowrap;
}

.page-about .ab-table tbody th,
.page-about .ab-table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(20, 17, 15, .18);
  text-align: left;
  color: var(--ink-600);
  vertical-align: top;
  line-height: 1.6;
}

.page-about .ab-table tbody th {
  font-weight: 700;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .ab-table tbody tr:last-child th,
.page-about .ab-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .ab-table tbody tr:hover th,
.page-about .ab-table tbody tr:hover td {
  background: var(--ember-200);
  color: var(--ink-900);
}

.page-about .ab-table thead th:first-child,
.page-about .ab-table tbody th:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--sand-050);
  border-right: 1px solid rgba(20, 17, 15, .3);
}

.page-about .ab-table thead th:first-child {
  background: var(--sand-300);
  z-index: 3;
}

.page-about .ab-table tbody tr:hover th:first-child {
  background: var(--ember-200);
}

.page-about .ab-versions__note {
  margin-top: 20px !important;
  font-size: 15px !important;
  padding: 14px 18px;
  border-left: 4px solid var(--teal-700);
  background: var(--sand-100);
}

/* ---------- 04 team ---------- */
.page-about .ab-team__lead {
  font-size: 18px !important;
  color: var(--ink-900) !important;
  margin-bottom: clamp(24px, 4vw, 36px) !important;
}

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .ab-team__card {
  border: var(--border-heavy);
  background: var(--paper);
  box-shadow: var(--shadow-hard);
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .ab-team__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hard-lg);
}

.page-about .ab-team__num {
  font-family: var(--font-display) !important;
  font-weight: 200;
  font-size: 56px !important;
  line-height: .9;
  color: transparent !important;
  -webkit-text-stroke: 2px var(--ember-600);
  margin: 0 0 10px !important;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-team__name {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--ink-900);
}

.page-about .ab-team__text {
  font-size: 15px !important;
  line-height: 1.8 !important;
  margin: 0 0 16px !important;
  flex: 1 1 auto;
}

.page-about .ab-team__meta {
  font-family: var(--font-sans) !important;
  font-size: 12px !important;
  letter-spacing: .06em;
  color: var(--teal-700) !important;
  margin: 0 !important;
  padding-top: 12px;
  border-top: 1px solid rgba(20, 17, 15, .25);
}

.page-about .ab-team__figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border: var(--border-heavy);
  background: var(--sand-300);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .ab-team__figure figcaption {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-600);
  padding: 10px 14px;
  border-top: 1px solid var(--ink-900);
  background: var(--sand-050);
}

/* ---------- 05 quality ---------- */
.page-about .ab-quality {
  background: var(--ink-900);
  color: var(--ink-inverse);
  border-bottom: 0;
}

.page-about .ab-quality .section-rule__label,
.page-about .ab-quality .section-rule__num {
  color: var(--ink-inverse);
}

.page-about .ab-quality .section-rule__line {
  background: var(--ink-inverse);
}

.page-about .ab-quality__strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border: 1px solid rgba(247, 241, 228, .35);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .ab-quality__item {
  padding: 20px 16px;
  border-bottom: 1px solid rgba(247, 241, 228, .25);
  border-right: 1px solid rgba(247, 241, 228, .25);
}

.page-about .ab-quality__item:nth-child(2n) {
  border-right: 0;
}

.page-about .ab-quality__item:nth-last-child(-n+2) {
  border-bottom: 0;
}

.page-about .ab-quality__num {
  font-family: var(--font-display) !important;
  font-weight: 300;
  font-size: clamp(34px, 7vw, 54px) !important;
  line-height: 1;
  color: var(--teal-300) !important;
  margin: 0 0 8px !important;
  font-variant-numeric: tabular-nums;
}

.page-about .ab-quality__num span {
  font-size: .45em;
  margin-left: 2px;
}

.page-about .ab-quality__label {
  font-family: var(--font-sans) !important;
  font-size: 13px !important;
  line-height: 1.65 !important;
  color: rgba(247, 241, 228, .82) !important;
  margin: 0 !important;
}

.page-about .ab-quality__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 3vw, 32px);
}

.page-about .ab-quality__body p {
  color: rgba(247, 241, 228, .82);
  margin: 0;
  max-width: 34em;
}

/* ---------- 06 reach ---------- */
.page-about .ab-reach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .ab-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: var(--border-heavy);
  background: var(--paper);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-reach__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  align-items: baseline;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(20, 17, 15, .18);
}

.page-about .ab-reach__list li:last-child {
  border-bottom: 0;
}

.page-about .ab-reach__key {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-600);
  min-width: 5.5em;
}

.page-about .ab-reach__val {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-900);
  word-break: break-word;
}

/* ---------- next ---------- */
.page-about .ab-next {
  background: var(--sand-300);
  border-bottom: 0;
}

.page-about .ab-next__title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.3;
  margin: 0 0 clamp(20px, 4vw, 32px);
  padding-bottom: 12px;
  border-bottom: 4px solid var(--ink-900);
  max-width: 20em;
}

.page-about .ab-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .ab-next__card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 6px 16px;
  padding: 18px 18px;
  background: var(--paper);
  border: var(--border-heavy);
  box-shadow: var(--shadow-hard);
  text-decoration: none;
  color: var(--ink-900);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}

.page-about .ab-next__card:hover,
.page-about .ab-next__card:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
  background: var(--ember-200);
}

.page-about .ab-next__tag {
  grid-column: 1 / -1;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ember-600);
}

.page-about .ab-next__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
}

.page-about .ab-next__go {
  font-size: 20px;
  color: var(--teal-700);
}

/* ---------- homeward line ---------- */
.page-about .ab-homeward {
  color: var(--teal-700);
  background: var(--sand-100);
  line-height: 0;
}

.page-about .ab-homeward svg {
  display: block;
  width: 100%;
  height: clamp(70px, 9vw, 120px);
}

/* ---------- media queries ---------- */
@media (min-width: 700px) {
  .page-about .ab-hero__index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-width: none;
  }

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

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

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

  .page-about .ab-quality__item {
    border-bottom: 0;
  }

  .page-about .ab-quality__item:nth-child(2n) {
    border-right: 1px solid rgba(247, 241, 228, .25);
  }

  .page-about .ab-quality__item:last-child {
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding-block: 36px var(--ab-pad);
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .ab-hero__figure {
    margin-top: 46px;
  }

  .page-about .ab-call__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .ab-timeline__inner {
    grid-template-columns: var(--ab-axis-w) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 52px);
  }

  .page-about .ab-axis {
    display: block;
    position: sticky;
    top: 140px;
    align-self: start;
    padding-top: 8px;
  }

  .page-about .ab-axis__line {
    display: block;
    width: 3px;
    height: 100%;
    min-height: 260px;
    background: var(--ink-900);
    position: absolute;
    left: 0;
    top: 0;
  }

  .page-about .ab-axis__ticks {
    list-style: none;
    margin: 0;
    padding: 0 0 0 20px;
    display: grid;
    gap: 40px;
  }

  .page-about .ab-axis__tick {
    font-family: var(--font-sans);
    font-size: 13px;
    letter-spacing: .1em;
    color: var(--ink-600);
    font-variant-numeric: tabular-nums;
    position: relative;
  }

  .page-about .ab-axis__tick::before {
    content: "";
    position: absolute;
    left: -20px;
    top: 7px;
    width: 14px;
    height: 3px;
    background: var(--ink-900);
  }

  .page-about .ab-versions__intro {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
  }

  .page-about .ab-quality__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .ab-reach__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

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

@media (min-width: 1180px) {
  .page-about .ab-hero__title {
    font-size: clamp(56px, 6.4vw, 96px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-hero__index-item,
  .page-about .ab-node,
  .page-about .ab-team__card,
  .page-about .ab-next__card,
  .page-about .ab-node__peek {
    transition: none;
  }

  .page-about .ab-hero__index-item:hover,
  .page-about .ab-node:hover,
  .page-about .ab-team__card:hover,
  .page-about .ab-next__card:hover {
    transform: none;
  }
}
<<<END>>>