.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 26px 0 0;
  color: var(--slate);
}
.page-about .about-crumbs a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--t) var(--ease);
}
.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  border-bottom-color: var(--gold);
}
.page-about .about-crumbs__sep {
  color: var(--line);
}
.page-about .about-crumbs__here {
  color: var(--greige);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: 56px;
}
.page-about .about-hero__title {
  margin: 16px 0 0;
  max-width: 16ch;
}
.page-about .about-hero__lede {
  margin: 24px 0 0;
  max-width: 58ch;
}
.page-about .about-hero__aside {
  margin-top: 38px;
}
.page-about .about-facts {
  margin: 0;
  border-top: 3px solid var(--ink);
}
.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .about-facts dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--greige);
}
.page-about .about-facts dd {
  margin: 0;
  font-size: 18px;
  color: var(--ink);
}
@media (min-width: 900px) {
  .page-about .about-hero__aside {
    margin-top: 6px;
  }
}

/* ---------- 沿革时间线 ---------- */
.page-about .about-timeline__head {
  max-width: 64ch;
}
.page-about .about-timeline__head .prose {
  margin-top: 14px;
}
.page-about .about-timeline__map {
  margin: 34px 0 0;
}
.page-about .about-track {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-about .about-track__item {
  position: relative;
  padding: 32px 0 32px 36px;
  border-bottom: 1px solid var(--line);
}
.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
}
.page-about .about-track__item::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 38px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
}
.page-about .about-track__item--now::after {
  background: var(--gold);
  box-shadow: 0 0 0 2px var(--ink);
}
.page-about .about-track__year {
  display: block;
  font-size: 15px;
  letter-spacing: 0.16em;
  color: var(--ink);
}
.page-about .about-track__ver {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--slate);
}
.page-about .about-track__body {
  margin-top: 12px;
}
.page-about .about-track__body .title-md {
  margin: 0;
}
.page-about .about-track__body p {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--greige);
}
@media (min-width: 900px) {
  .page-about .about-track__item {
    display: grid;
    grid-template-columns: 70px 1fr;
    column-gap: 44px;
    align-items: start;
    padding: 40px 0 40px 48px;
  }
  .page-about .about-track__item::before {
    left: 12px;
  }
  .page-about .about-track__item::after {
    left: 8px;
    top: 46px;
  }
  .page-about .about-track__axis {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .page-about .about-track__year {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.3em;
    font-size: 16px;
  }
  .page-about .about-track__ver {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin-top: 0;
    letter-spacing: 0.22em;
  }
  .page-about .about-track__body {
    margin-top: 0;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-crew__head {
  max-width: 64ch;
}
.page-about .about-crew__head .prose {
  margin-top: 14px;
}
.page-about .about-crew__shot {
  margin: 32px 0 0;
}
.page-about .about-crew__grid {
  margin-top: 32px;
}
.page-about .about-crew__card {
  display: flex;
  flex-direction: column;
  padding: 24px 22px 22px;
}
.page-about .about-crew__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--slate);
}
.page-about .about-crew__card .card__title {
  margin: 10px 0 0;
  font-size: 21px;
  font-weight: 500;
}
.page-about .about-crew__count {
  margin: 14px 0 0;
  font-size: 40px;
  line-height: 1;
  color: var(--ink);
}
.page-about .about-crew__desc {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--greige);
}
.page-about .card__index {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--slate);
  opacity: 0.6;
  transition: opacity var(--t) var(--ease), color var(--t) var(--ease);
}
.page-about .card:hover .card__index,
.page-about .card:focus-within .card__index {
  opacity: 1;
  color: var(--ink);
}

/* ---------- 核对节奏（深色分区） ---------- */
.page-about .about-cadence__kicker {
  color: var(--gold);
}
.page-about .about-cadence__title {
  margin: 14px 0 0;
  color: var(--sand);
}
.page-about .about-cadence__lede {
  margin: 0;
  color: rgba(244, 237, 227, 0.78);
}
.page-about .about-cadence__list {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  border-top: 1px solid rgba(244, 237, 227, 0.22);
}
.page-about .about-cadence__item {
  position: relative;
  padding: 20px 0 20px 20px;
  border-bottom: 1px solid rgba(244, 237, 227, 0.22);
}
.page-about .about-cadence__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 3px;
  height: 20px;
  background: var(--gold);
}
.page-about .about-cadence__tag {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .about-cadence__item p {
  margin: 8px 0 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: rgba(244, 237, 227, 0.86);
}
@media (min-width: 760px) {
  .page-about .about-cadence__list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    column-gap: 56px;
  }
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach__copy .prose {
  margin-top: 14px;
}
.page-about .about-reach__bar {
  display: flex;
  height: 18px;
  margin-top: 32px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  overflow: hidden;
}
.page-about .about-reach__seg--back {
  flex: 61 0 0;
  background: var(--gum);
}
.page-about .about-reach__seg--new {
  flex: 39 0 0;
  background: var(--gold-soft);
}
.page-about .about-reach__legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  font-size: 13.5px;
  color: var(--greige);
}
.page-about .about-reach__legend li {
  display: flex;
  align-items: center;
}
.page-about .about-reach__dot {
  display: inline-block;
  box-sizing: border-box;
  width: 11px;
  height: 11px;
  margin-right: 8px;
  border-radius: 50%;
}
.page-about .about-reach__dot--back {
  background: var(--gum);
}
.page-about .about-reach__dot--new {
  background: var(--gold-soft);
  border: 1px solid var(--gold);
}
.page-about .about-reach__note {
  margin: 28px 0 0;
  padding: 14px 0 14px 16px;
  border-left: 3px solid var(--gold);
  font-size: 15px;
  line-height: 1.75;
  color: var(--greige);
}
.page-about .about-reach__figure {
  margin-top: 34px;
}
@media (min-width: 900px) {
  .page-about .about-reach__figure {
    margin-top: 6px;
  }
}

/* ---------- 对照索引伙伴 ---------- */
.page-about .about-partners__head {
  max-width: 64ch;
}
.page-about .about-partners__head .prose {
  margin-top: 14px;
}
.page-about .about-partners__grid {
  margin-top: 36px;
}
.page-about .about-partners__cell {
  padding: 22px 0 0;
  border-top: 3px solid var(--ink);
}
.page-about .about-partners__cell + .about-partners__cell {
  margin-top: 28px;
}
.page-about .about-partners__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ochre);
}
.page-about .about-partners__cell .title-md {
  margin: 12px 0 0;
}
.page-about .about-partners__cell p:last-child {
  margin: 10px 0 0;
  max-width: 40ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--greige);
}
@media (min-width: 760px) {
  .page-about .about-partners__cell + .about-partners__cell {
    margin-top: 0;
  }
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-next__link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  align-items: baseline;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease), border-color var(--t) var(--ease);
}
.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hard);
  border-color: var(--ink);
}
.page-about .about-next__idx {
  font-size: 12px;
  color: var(--slate);
}
.page-about .about-next__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.page-about .about-next__desc {
  grid-column: 2;
  font-size: 14px;
  line-height: 1.65;
  color: var(--greige);
}
@media (min-width: 760px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
}

@media (max-width: 560px) {
  .page-about .about-crew__count {
    font-size: 32px;
  }
  .page-about .about-hero__title {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__link,
  .page-about .card__index,
  .page-about .about-crumbs a {
    transition: none;
  }
  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}