.page-about {
  --about-axis-w: 172px;
}

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

.page-about .about-lead__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.page-about .about-lead__lede {
  margin-top: clamp(14px, 2vw, 22px);
  max-width: 64ch;
  color: var(--t400);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 1px;
  background: var(--g700);
  border: 1px solid var(--g700);
}

.page-about .about-metrics__cell {
  min-width: 0;
  padding: clamp(14px, 2vw, 20px);
  background: var(--g800);
}

.page-about .about-metrics__label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--t400);
}

.page-about .about-metrics__value {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin: 10px 0 0;
  color: var(--t100);
}

.page-about .about-metrics__value .num {
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--fg400);
}

.page-about .about-metrics__cell:nth-child(2) .num {
  color: var(--ag500);
}

.page-about .about-metrics__cell:nth-child(3) .num {
  color: var(--t100);
}

.page-about .about-metrics__cell:nth-child(4) .num {
  color: var(--cb600);
}

.page-about .about-metrics__unit {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--t400);
}

@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-shell {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
  align-items: start;
}

.page-about .about-shell > * {
  min-width: 0;
}

.page-about .about-axis {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--g700);
}

.page-about .about-axis__head {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--t400);
}

.page-about .about-axis__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-axis__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--g700);
  color: var(--t400);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-axis__idx {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--cb600);
}

.page-about .about-axis__link:hover,
.page-about .about-axis__link:focus-visible {
  color: var(--t100);
  border-color: var(--fg400);
}

@media (min-width: 1080px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    column-gap: clamp(28px, 3.6vw, 56px);
  }

  .page-about .about-axis {
    position: sticky;
    top: 96px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .about-axis__list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    border-left: 1px solid var(--g700);
    overflow: visible;
  }

  .page-about .about-axis__link {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    margin-left: -1px;
    padding: 11px 8px 11px 14px;
    border: 0;
    border-left: 2px solid transparent;
    line-height: 1.45;
    white-space: normal;
  }

  .page-about .about-axis__link:hover,
  .page-about .about-axis__link:focus-visible {
    border-left-color: var(--fg400);
    background: linear-gradient(90deg, rgba(198, 242, 78, 0.1), rgba(198, 242, 78, 0) 86%);
  }
}

.page-about .about-chapter p {
  max-width: 68ch;
  color: var(--t100);
}

.page-about .about-versions__grid {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 900px) {
  .page-about .about-versions__grid {
    grid-template-columns: minmax(0, 1fr) minmax(180px, 236px);
    align-items: start;
  }

  .page-about .about-versions__figure {
    position: sticky;
    top: 96px;
  }
}

.page-about .about-stage {
  position: relative;
  margin-bottom: clamp(14px, 2vw, 20px);
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--g800);
  border: 1px solid var(--g700);
}

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

.page-about .about-stage--tight {
  padding-block: clamp(14px, 1.8vw, 20px);
}

.page-about .about-stage--tall {
  padding-block: clamp(30px, 4.4vw, 56px);
}

.page-about .about-stage__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 10px;
}

.page-about .about-stage__v {
  font-family: var(--f-mono);
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--fg400);
}

.page-about .about-stage:nth-child(even) .about-stage__v {
  color: var(--ag500);
}

.page-about .about-stage__head h3 {
  margin: 0;
}

.page-about .about-stage p {
  margin: 0;
  max-width: 64ch;
}

.page-about .about-list {
  display: grid;
  gap: 7px;
  margin: 10px 0 0;
  padding-left: 1.15em;
  color: var(--t400);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-list--loose {
  gap: 11px;
  font-size: 15px;
}

.page-about .about-list li::marker {
  color: var(--cb600);
}

.page-about .fold__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  margin-top: 14px;
  padding: 12px 0 2px;
  border: 0;
  border-top: 1px solid var(--g700);
  background: none;
  color: var(--t400);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: left;
  cursor: pointer;
}

.page-about .fold__trigger:hover,
.page-about .fold__trigger:focus-visible {
  color: var(--fg400);
}

.page-about .fold__icon {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
}

.page-about .fold__icon::before,
.page-about .fold__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-about .fold__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
}

.page-about .fold__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
}

.page-about .fold__trigger[aria-expanded="false"] .fold__icon::after {
  display: none;
}

.page-about .fold__trigger[aria-expanded="false"] + .fold__panel {
  display: none;
}

.page-about .fold__panel[hidden] {
  display: none;
}

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

.page-about .about-team__figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
}

.page-about .about-team__grid {
  margin-top: clamp(4px, 1vw, 12px);
}

.page-about .about-flow__wrap {
  margin: clamp(20px, 3vw, 32px) 0 0;
  overflow-x: auto;
}

.page-about .about-flow {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

@media (min-width: 720px) {
  .page-about .about-flow {
    min-width: 0;
  }
}

.page-about .about-flow__box {
  fill: none;
  stroke-width: 1.2;
}

.page-about .about-flow__node--log .about-flow__box {
  stroke: var(--cb600);
}

.page-about .about-flow__node--check .about-flow__box {
  stroke: var(--fg400);
}

.page-about .about-flow__node--sample .about-flow__box {
  stroke: var(--ag500);
}

.page-about .about-flow__t {
  fill: var(--t100);
  font-family: var(--f-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.page-about .about-flow__d {
  fill: var(--t400);
  font-family: var(--f-body);
  font-size: 11px;
}

.page-about .about-flow__link {
  stroke: var(--g700);
  stroke-width: 1;
  stroke-dasharray: 4 5;
}

.page-about .about-eco {
  margin-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--g700);
}

.page-about .about-eco__row {
  display: grid;
  gap: 10px 22px;
  padding: 18px 0;
  border-bottom: 1px solid var(--g700);
}

.page-about .about-eco__name {
  margin: 0;
  font-family: var(--f-head);
  font-size: 17px;
  font-weight: 500;
}

.page-about .about-eco__dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-eco__dot {
  width: 15px;
  height: 15px;
  background: var(--g700);
  transition: transform 0.18s ease;
}

.page-about .about-eco__dot--media {
  background: var(--cb600);
}

.page-about .about-eco__dot--lab {
  background: var(--fg400);
}

.page-about .about-eco__dot--school {
  background: var(--ag500);
}

.page-about .about-eco__note {
  margin: 0;
  color: var(--t400);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .about-eco__row:hover .about-eco__dot {
  transform: translateY(-2px);
}

@media (min-width: 820px) {
  .page-about .about-eco__row {
    grid-template-columns: 150px 220px minmax(0, 1fr);
    align-items: center;
  }
}

.page-about .about-eco__award {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-eco__award p {
  max-width: 66ch;
  color: var(--t400);
}

.page-about .about-place__figure {
  margin: clamp(20px, 3vw, 30px) 0 clamp(22px, 3vw, 34px);
}

.page-about .about-close {
  border-top: 1px solid var(--g700);
}

.page-about .about-close__inner {
  display: grid;
  gap: 18px;
}

.page-about .about-close__text {
  margin: 0;
  max-width: 62ch;
  color: var(--t400);
  line-height: 1.9;
}

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

@media (min-width: 880px) {
  .page-about .about-close__inner {
    grid-template-columns: minmax(0, 1.6fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-axis__link,
  .page-about .about-eco__dot {
    transition: none;
  }

  .page-about .about-eco__row:hover .about-eco__dot {
    transform: none;
  }
}