.page-about {
  --about-rail-w: 232px;
  --about-block: clamp(40px, 6vw, 76px);
  background: var(--c-paper);
  color: var(--c-black);
  font-family: var(--font-body);
}

.page-about .about-top {
  position: relative;
  overflow: hidden;
  background: var(--c-green-900);
  color: var(--c-paper);
  padding-block: clamp(14px, 2.4vw, 24px) clamp(32px, 5vw, 64px);
}

.page-about .about-top::after {
  content: "";
  position: absolute;
  inset: auto -12% -45% 50%;
  height: 145%;
  background: radial-gradient(circle at 32% 30%, rgba(47, 125, 106, 0.5), transparent 62%);
  pointer-events: none;
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(16px, 3vw, 28px);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb__link {
  color: var(--c-amber-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  border-bottom-color: var(--c-amber);
}

.page-about .breadcrumb__sep,
.page-about .breadcrumb__current {
  color: var(--c-mist);
}

.page-about .about-mast {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
  gap: clamp(20px, 4vw, 44px);
}

.page-about .about-mast__text {
  min-width: 0;
}

.page-about .about-mast__title {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--c-paper);
  text-wrap: balance;
}

.page-about .about-mast__lede {
  max-width: 54ch;
  margin: 0;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: rgba(244, 239, 228, 0.9);
}

.page-about .about-mast__meta {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-amber-soft);
}

.page-about .about-mast__figure {
  margin: 0;
  border: 1px solid rgba(227, 169, 60, 0.5);
  background: var(--c-green-800);
}

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

.page-about .about-main {
  padding-block: clamp(36px, 5vw, 72px) clamp(56px, 8vw, 104px);
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-rail {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-green-500);
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-green-800);
}

.page-about .about-rail__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 9px 8px 9px 0;
  border-bottom: 1px solid rgba(201, 207, 199, 0.7);
  color: var(--c-green-900);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--c-amber-soft);
  color: var(--c-black);
}

.page-about .about-rail__link.is-current {
  background: var(--c-amber);
  color: var(--c-black);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-green-800);
}

.page-about .about-rail__link.is-current .about-rail__num {
  color: var(--c-black);
}

.page-about .about-rail__name {
  font-size: 14px;
  line-height: 1.4;
}

.page-about .about-rail__hint {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-green-500);
}

.page-about .about-body {
  display: flex;
  flex-direction: column;
  gap: var(--about-block);
  min-width: 0;
}

.page-about .about-body a:not(.button) {
  color: var(--c-green-800);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: var(--c-green-500);
  transition: text-decoration-color var(--dur) var(--ease);
}

.page-about .about-body a:not(.button):hover,
.page-about .about-body a:not(.button):focus-visible {
  text-decoration-color: var(--c-amber);
  text-decoration-thickness: 3px;
}

.page-about .about-section__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-green-800);
}

.page-about .about-section__kicker::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--c-green-500), transparent);
}

.page-about .about-section__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.2vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-green-900);
}

.page-about .about-section__lead {
  max-width: 62ch;
  margin: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.9;
}

.page-about .about-intro {
  background: var(--c-green-900);
  color: var(--c-paper);
  padding: clamp(22px, 4vw, 44px);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .about-intro__lead {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 18.5px);
  line-height: 1.9;
  color: rgba(244, 239, 228, 0.94);
}

.page-about .about-intro__lead::first-letter {
  float: left;
  padding: 6px 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3.6em;
  line-height: 0.86;
  color: var(--c-amber);
}

.page-about .about-intro a:not(.button) {
  color: var(--c-amber-soft);
  text-decoration-color: var(--c-amber);
}

.page-about .about-caps {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cap {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 16px 0;
  border-top: 1px solid rgba(244, 239, 228, 0.2);
}

.page-about .about-cap:last-child {
  border-bottom: 1px solid rgba(244, 239, 228, 0.2);
}

.page-about .about-cap__num {
  grid-row: 1 / span 2;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

.page-about .about-cap__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  color: var(--c-amber-soft);
}

.page-about .about-cap__text {
  grid-column: 2;
  margin: 4px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 228, 0.82);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-green-500), var(--c-amber));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(20px, 2.6vw, 30px) 54px;
  scroll-margin-top: calc(var(--quickbar-height) + 24px);
}

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

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--c-green-800);
  color: var(--c-amber-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__node,
.page-about .about-timeline__item:focus-within .about-timeline__node {
  background: var(--c-green-500);
  color: var(--c-paper);
}

.page-about .about-timeline__item.is-current .about-timeline__node {
  background: var(--c-amber);
  color: var(--c-black);
}

.page-about .about-timeline__body {
  min-width: 0;
}

.page-about .about-timeline__title {
  margin: 2px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 20px);
  font-weight: 700;
  color: var(--c-green-900);
}

.page-about .about-timeline__title .ver {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 0.78em;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-green-500);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15.2px;
  line-height: 1.85;
  color: var(--c-black);
}

.page-about .about-figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
  border: 1px solid var(--c-line);
  background: var(--c-paper);
}

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

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

.page-about .data-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .data-table th {
  padding: 10px 12px;
  background: var(--c-green-800);
  color: var(--c-paper);
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

.page-about .data-table td {
  padding: 12px;
  border-bottom: 1px solid var(--c-line);
  line-height: 1.7;
  vertical-align: top;
}

.page-about .data-table tbody tr:nth-child(even) {
  background: rgba(20, 82, 71, 0.06);
}

.page-about .data-table .is-num {
  font-family: var(--font-mono);
  color: var(--c-green-900);
  white-space: nowrap;
}

.page-about .about-tags {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tags__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--c-line);
}

.page-about .about-tags__text {
  flex: 1 1 260px;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-tags + .about-section__lead {
  margin-top: 22px;
  margin-bottom: 0;
}

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

.page-about .about-crew__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  column-gap: 16px;
  padding: 16px 12px 16px 0;
  border-top: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-crew__item:last-child {
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-crew__item:hover {
  padding-left: 12px;
  background: rgba(227, 169, 60, 0.14);
}

.page-about .about-crew__num {
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-green-800);
}

.page-about .about-crew__name {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 700;
  color: var(--c-green-900);
}

.page-about .about-crew__desc {
  grid-column: 2;
  grid-row: 2;
  margin: 5px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-black);
}

.page-about .about-reach {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-reach__item {
  background: var(--c-paper);
  padding: 18px 16px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-reach__item:hover {
  background: var(--c-amber-soft);
}

.page-about .about-reach__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-green-900);
}

.page-about .about-reach__num .unit {
  margin-left: 3px;
  font-size: 0.46em;
  letter-spacing: 0.02em;
}

.page-about .about-reach__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-green-800);
}

.page-about .about-reach__note {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-black);
}

.page-about .about-flow {
  margin-top: 22px;
  border-top: 1px solid var(--c-line);
}

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

.page-about .about-flow__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 4px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  color: var(--c-green-900);
  transition: background var(--dur) var(--ease);
}

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

.page-about .about-flow__summary:hover,
.page-about .about-flow__summary:focus-visible {
  background: rgba(227, 169, 60, 0.14);
}

.page-about .about-flow__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--c-green-800);
}

.page-about .about-flow__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-coral);
}

.page-about .about-flow__step[open] .about-flow__summary::after {
  content: "−";
}

.page-about .about-flow__body {
  padding: 0 4px 18px;
}

.page-about .about-flow__body p {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-flow__body ul {
  margin: 0;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-green-900);
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  padding: clamp(24px, 4vw, 40px);
  background: var(--c-ink-900);
  color: var(--c-paper);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-amber-soft);
}

.page-about .about-cta__text {
  max-width: 56ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 228, 0.85);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 780px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-flow__body {
    padding-left: 46px;
  }
}

@media (min-width: 900px) {
  .page-about .about-mast {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--quickbar-height) + 20px);
  }

  .page-about .about-rail__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 1ms !important;
  }
}
<<<END>>>