.page-about {
  background: var(--mist);
  color: var(--rock);
}

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

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  font-size: 14px;
  line-height: 1.6;
}

.page-about .breadcrumb li {
  display: flex;
  align-items: center;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line-strong);
}

.page-about .breadcrumb a {
  color: var(--tide-blue);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--rock);
}

.page-about .about-hero-frame {
  background: var(--paper);
  padding: 32px 22px 28px;
}

.page-about .about-hero-frame .title-display {
  margin: 14px 0 0;
  color: var(--deep-sea);
  font-family: var(--font-display);
  font-size: clamp(30px, 6.2vw, 56px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 33em;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-marks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-marks li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--paper);
}

.page-about .mark-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--deep-sea);
}

.page-about .mark-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--rock);
  opacity: 0.82;
}

.page-about .about-plate {
  margin: 48px 0 0;
  background: var(--deep-sea);
  border-top: 2px solid var(--deep-sea);
  border-bottom: 2px solid var(--deep-sea);
}

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

.page-about .about-plate figcaption {
  padding: 12px 20px;
  background: var(--deep-sea);
  color: var(--on-dark-soft);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .about-flow {
  padding-top: 0;
  padding-bottom: 72px;
}

.page-about .about-section {
  padding: 52px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-sec-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.page-about .about-sec-head .num-block {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--coral);
  color: var(--sand);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: var(--hard-shadow-sm);
  transition: transform 0.2s var(--ease-tide), box-shadow 0.2s var(--ease-tide);
}

.page-about .about-sec-head .num-block:hover {
  transform: translate(-2px, -2px);
  box-shadow: 2px 2px 0 rgba(14, 42, 71, 0.16);
}

.page-about .about-sec-head .title-section {
  margin: 0;
  color: var(--deep-sea);
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.page-about .about-cols {
  display: grid;
  gap: 32px;
}

.page-about .prose {
  max-width: 34em;
}

.page-about .prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
}

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

.page-about .prose p:first-child {
  color: var(--deep-sea);
  font-weight: 600;
}

.page-about .about-note {
  padding: 20px 18px;
  background: var(--paper);
  border: 2px solid var(--deep-sea);
  box-shadow: var(--hard-shadow);
}

.page-about .note-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--tide-blue);
}

.page-about .note-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .note-list li {
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.65;
}

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

.page-about .note-time {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--coral);
}

.page-about .about-timeline {
  display: grid;
  gap: 26px;
}

.page-about .about-rail {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.page-about .about-tick {
  flex: none;
  padding-bottom: 6px;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--rock);
  text-decoration: none;
  transition: color 0.2s var(--ease-tide), border-color 0.2s var(--ease-tide);
}

.page-about .about-tick:hover,
.page-about .about-tick:focus-visible {
  color: var(--deep-sea);
  border-bottom-color: var(--coral);
  outline: none;
}

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

.page-about .about-stage {
  padding: 0 0 30px;
  margin: 0 0 30px;
  border-bottom: 1px solid rgba(216, 169, 75, 0.45);
}

.page-about .about-stage:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-about .stage-year {
  display: block;
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--coral);
}

.page-about .stage-title {
  margin: 0 0 10px;
  color: var(--deep-sea);
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-stage p {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-team-wrap {
  display: grid;
  gap: 32px;
}

.page-about .about-lead-p {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--deep-sea);
  font-weight: 600;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-team li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 18px 16px 20px;
  background: var(--paper);
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--deep-sea);
}

.page-about .team-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--coral);
}

.page-about .about-team li p {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--rock);
}

.page-about .about-vert {
  margin: 0;
  background: var(--paper);
  border: 2px solid var(--deep-sea);
}

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

.page-about .about-vert figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
}

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

.page-about .about-check-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-check-list li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .check-idx {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--sand);
}

.page-about .about-check-list h3 {
  margin: 0;
  color: var(--deep-sea);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-check-list p {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-adapt-wrap {
  display: grid;
  gap: 32px;
}

.page-about .about-side-fig {
  margin: 0;
  background: var(--paper);
  border: 2px solid var(--deep-sea);
  box-shadow: var(--hard-shadow);
}

.page-about .about-side-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .about-side-fig figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .about-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 22px 0 0;
}

.page-about .about-text-link {
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  color: var(--tide-blue);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.2s var(--ease-tide);
}

.page-about .about-text-link:hover {
  color: var(--coral);
}

.page-about .about-coda {
  padding: 52px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-coda .serif-quote {
  margin: 0;
  padding-left: 20px;
  border-left: 4px solid var(--coral);
  color: var(--deep-sea);
  font-family: var(--font-editorial);
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.5;
  letter-spacing: 0.01em;
}

.page-about .coda-text {
  margin: 24px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .coda-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 26px 0 0;
}

@media (min-width: 640px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-hero-frame {
    padding: 52px 44px 44px;
  }

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

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

  .page-about .about-plate figcaption {
    padding: 14px 32px;
  }
}

@media (min-width: 880px) {
  .page-about .about-timeline {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .about-tick {
    position: relative;
    display: flex;
    align-items: flex-start;
    height: 84px;
    padding: 0 0 0 20px;
    border-bottom: 0;
    font-size: 15px;
    color: var(--tide-blue);
  }

  .page-about .about-tick::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 11px;
    height: 1px;
    background: var(--sand);
  }

  .page-about .about-tick:hover,
  .page-about .about-tick:focus-visible {
    color: var(--coral);
    border-bottom-color: transparent;
  }
}

@media (min-width: 900px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team-wrap {
    grid-template-columns: minmax(0, 1fr) 258px;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-adapt-wrap {
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-section {
    padding: 68px 0;
  }

  .page-about .about-flow {
    padding-bottom: 88px;
  }

  .page-about .about-coda {
    padding-top: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-sec-head .num-block,
  .page-about .about-tick,
  .page-about .about-text-link {
    transition: none;
  }

  .page-about .about-sec-head .num-block:hover {
    transform: none;
  }
}
<<<END>>>