.page-about {
  --about-pad: clamp(2.5rem, 7vw, 5rem);
  --about-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--c-indigo);
  color: var(--c-paper);
}

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

.page-about .section {
  padding-block: var(--about-pad);
}

.page-about .figure__media {
  overflow: hidden;
}

.page-about .figure__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 01 首屏 ---------- */

.page-about .about-hero {
  padding-top: clamp(1.25rem, 3vw, 2rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero__lede .eyebrow {
  margin: 0 0 .9rem;
}

.page-about .about-hero__lede .display {
  margin: 0 0 1.25rem;
  max-width: 20ch;
}

.page-about .about-hero__lede .prose {
  max-width: 46ch;
  margin: 0 0 1rem;
}

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

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure .figure__media {
  position: relative;
  aspect-ratio: 4 / 5;
  border: 2px solid var(--c-steel);
  background: var(--c-charcoal);
}

.page-about .about-hero__figure .figure__media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--c-lime);
}

.page-about .about-hero__figure .figure__caption {
  margin-top: .75rem;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

/* 数据条 */

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(2rem, 5vw, 3.5rem) 0 0;
  padding: 0;
  border-top: 2px solid var(--c-steel);
  border-bottom: 2px solid var(--c-steel);
}

.page-about .about-facts__item {
  padding: 1.1rem 1rem;
  border-right: 1px solid rgba(138, 147, 166, .22);
  border-bottom: 1px solid rgba(138, 147, 166, .22);
}

.page-about .about-facts__item:nth-child(2n) {
  border-right: none;
}

.page-about .about-facts__item:nth-last-child(-n+2) {
  border-bottom: none;
}

.page-about .about-facts__label {
  font-size: .68rem;
  letter-spacing: .2em;
  color: var(--c-gray);
  margin: 0;
}

.page-about .about-facts__value {
  display: block;
  margin: .35rem 0 .2rem;
  font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-lime);
}

.page-about .about-facts__note {
  margin: 0;
  font-size: .82rem;
  color: var(--c-gray);
}

@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-facts__item {
    border-bottom: none;
  }
  .page-about .about-facts__item:nth-child(2n) {
    border-right: 1px solid rgba(138, 147, 166, .22);
  }
  .page-about .about-facts__item:last-child {
    border-right: none;
  }
}

/* ---------- 02 三件事 ---------- */

.page-about .about-do__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .about-do__item {
  padding: 1.5rem 1.25rem 1.35rem;
  background: var(--c-charcoal);
  border: 2px solid var(--c-steel);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-do__item:hover,
.page-about .about-do__item:focus-within {
  border-color: var(--c-lime);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-do__num {
  margin: 0 0 .6rem;
  font-size: clamp(2.4rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-lime);
  letter-spacing: .02em;
}

.page-about .about-do__numsub {
  font-size: .9rem;
  color: var(--c-gray);
  margin-left: .25rem;
  letter-spacing: .05em;
}

.page-about .about-do__title {
  margin: 0 0 .6rem;
  font-size: 1.15rem;
  font-weight: 700;
  border-left: 3px solid var(--c-signal);
  padding-left: .6rem;
}

.page-about .about-do__body {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--c-paper-dim, var(--c-gray));
}

@media (min-width: 820px) {
  .page-about .about-do__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

/* ---------- 03 成长刻度 ---------- */

.page-about .about-scale__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 4vw, 2.5rem);
  align-items: start;
}

.page-about .about-scale__rail {
  padding-bottom: .5rem;
}

.page-about .about-scale__railtitle {
  margin: 0 0 .5rem;
  font-size: .68rem;
  letter-spacing: .24em;
  color: var(--c-gray);
}

.page-about .about-scale__ticks {
  display: flex;
  gap: .5rem;
  margin: 0;
  padding: 0 0 .6rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-scale__tick {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .45rem .7rem;
  border-left: 3px solid transparent;
  background: rgba(42, 58, 107, .18);
  color: var(--c-gray);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-scale__tick:hover,
.page-about .about-scale__tick:focus-visible {
  color: var(--c-paper);
  border-left-color: var(--c-lime);
  background: rgba(198, 255, 61, .08);
}

.page-about .about-scale__year {
  font-size: .95rem;
  font-weight: 700;
  color: inherit;
}

.page-about .about-scale__name {
  font-size: .8rem;
}

.page-about .about-scale__stream {
  border-top: 2px solid var(--c-steel);
}

.page-about .about-stage {
  position: relative;
  padding: 1.5rem 0 1.5rem 1.75rem;
  border-left: 2px solid var(--c-steel);
  border-bottom: 1px solid rgba(138, 147, 166, .18);
  scroll-margin-top: calc(var(--status-h) + 1rem);
}

.page-about .about-stage:last-child {
  border-bottom: none;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 1.85rem;
  width: 12px;
  height: 12px;
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px var(--c-indigo);
}

.page-about .about-stage__tag {
  margin: 0 0 .5rem;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.page-about .about-stage__title {
  margin: 0 0 .65rem;
  font-size: clamp(1.15rem, 3.2vw, 1.5rem);
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-stage__body {
  margin: 0;
  max-width: 56ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--c-paper-dim, var(--c-gray));
}

@media (min-width: 960px) {
  .page-about .about-scale__body {
    grid-template-columns: 13rem minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-scale__rail {
    position: sticky;
    top: calc(var(--status-h) + 1.5rem);
  }

  .page-about .about-scale__ticks {
    flex-direction: column;
    gap: .15rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-scale__tick {
    background: transparent;
    width: 100%;
  }
}

/* ---------- 04 全宽图像带 ---------- */

.page-about .about-band {
  margin: 0;
  padding: 0;
  background: var(--c-charcoal);
  border-top: 3px solid var(--c-steel);
  border-bottom: 3px solid var(--c-steel);
}

.page-about .about-band__figure {
  margin: 0;
}

.page-about .about-band__media {
  aspect-ratio: 7 / 3;
  overflow: hidden;
}

.page-about .about-band__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-band__caption {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.5rem;
  align-items: baseline;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: .9rem clamp(1rem, 4vw, 2.5rem) 1.1rem;
  font-size: .82rem;
  color: var(--c-gray);
}

.page-about .about-band__caption .mono {
  color: var(--c-lime);
  letter-spacing: .12em;
}

/* ---------- 05 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-team__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-team__card {
  padding: 1.25rem 1.15rem 1.1rem;
  background: var(--c-charcoal);
  border: 2px solid var(--c-steel);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  border-color: var(--c-cyan);
  background: #171a24;
}

.page-about .about-team__idx {
  margin: 0 0 .5rem;
  font-size: .68rem;
  letter-spacing: .22em;
  color: var(--c-cyan);
}

.page-about .about-team__name {
  margin: 0 0 .55rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.page-about .about-team__duty {
  margin: 0 0 .8rem;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-paper-dim, var(--c-gray));
}

.page-about .about-team__scope {
  margin: 0;
  padding-top: .65rem;
  border-top: 1px solid rgba(138, 147, 166, .25);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--c-gray);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure .figure__media {
  aspect-ratio: 10 / 7;
  border: 2px solid var(--c-steel);
  background: var(--c-charcoal);
}

.page-about .about-team__figure .figure__caption {
  margin-top: .75rem;
}

@media (min-width: 640px) {
  .page-about .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-about .about-team__figure {
    position: sticky;
    top: calc(var(--status-h) + 1.5rem);
  }
}

/* ---------- 06 档案纸黄区块 ---------- */

.page-about .about-archive {
  background: var(--c-arch);
  color: var(--c-ink);
  border-top: 3px solid var(--c-ink);
  border-bottom: 3px solid var(--c-ink);
}

.page-about .about-archive .section-head__title,
.page-about .about-archive .section-head__note {
  color: var(--c-ink);
}

.page-about .about-archive .section-head__note {
  opacity: .7;
}

.page-about .about-archive .section-head__index {
  color: var(--c-signal);
}

.page-about .about-archive__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3.25rem);
}

.page-about .about-archive__sub {
  margin: 0 0 1rem;
  font-size: 1.02rem;
  font-weight: 700;
  padding-bottom: .6rem;
  border-bottom: 2px solid var(--c-ink);
}

.page-about .about-archive__fields,
.page-about .about-archive__notes {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-archive__fields li {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: .5rem;
  padding: .7rem 0;
  border-bottom: 1px dashed rgba(10, 26, 22, .28);
  font-size: .92rem;
  line-height: 1.72;
}

.page-about .about-archive__fields li:last-child {
  border-bottom: none;
}

.page-about .about-archive__fields .mono {
  color: var(--c-signal);
  font-size: .8rem;
  letter-spacing: .1em;
  padding-top: .18rem;
}

.page-about .about-archive__fields strong {
  font-weight: 700;
}

.page-about .about-archive__notes li {
  position: relative;
  padding: .65rem 0 .65rem 1.35rem;
  font-size: .92rem;
  line-height: 1.8;
  border-bottom: 1px dashed rgba(10, 26, 22, .22);
}

.page-about .about-archive__notes li:last-child {
  border-bottom: none;
}

.page-about .about-archive__notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  width: .5rem;
  height: .5rem;
  background: var(--c-ink);
}

@media (min-width: 900px) {
  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

/* ---------- 07 覆盖与资质 ---------- */

.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-coverage__big {
  margin: 0;
  font-size: clamp(4rem, 16vw, 8rem);
  font-weight: 700;
  line-height: .85;
  color: var(--c-lime);
  letter-spacing: -.02em;
}

.page-about .about-coverage__unit {
  margin: .5rem 0 1rem;
  font-size: .95rem;
  color: var(--c-gray);
  letter-spacing: .05em;
}

.page-about .about-coverage__lead .prose {
  max-width: 44ch;
}

.page-about .about-coverage__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 2px solid var(--c-steel);
}

.page-about .about-coverage__list li {
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(138, 147, 166, .22);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-coverage__list li:hover {
  border-bottom-color: var(--c-lime);
}

.page-about .about-coverage__lt {
  margin: 0 0 .35rem;
  font-size: .68rem;
  letter-spacing: .22em;
  color: var(--c-cyan);
}

.page-about .about-coverage__ltitle {
  margin: 0 0 .4rem;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .about-coverage__lbody {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-paper-dim, var(--c-gray));
}

@media (min-width: 900px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
}

/* ---------- 08 合作 ---------- */

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-partners__stats {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 2px solid var(--c-steel);
}

.page-about .about-partners__stats li {
  display: grid;
  grid-template-columns: minmax(4.5rem, auto) minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(138, 147, 166, .22);
}

.page-about .about-partners__num {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-signal);
}

.page-about .about-partners__cap {
  font-size: .9rem;
  line-height: 1.7;
  color: var(--c-paper-dim, var(--c-gray));
}

.page-about .about-partners__cta .prose {
  max-width: 48ch;
  margin-bottom: 1rem;
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.5rem;
}

@media (min-width: 900px) {
  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-partners__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 1.5rem;
    border-top: none;
  }

  .page-about .about-partners__stats li {
    grid-template-columns: 1fr;
    gap: .5rem;
    padding: 1.1rem 0;
    border-top: 2px solid var(--c-steel);
  }
}