.page-about {
  --about-rule: 1px solid var(--rc-line);
  --about-rule-gold: 1px solid var(--rc-line-gold);
  --about-gap: clamp(1.25rem, 3.5vw, 2.75rem);
  --about-pad-y: clamp(2.5rem, 6vw, 4.5rem);
  --about-side-width: 150px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__frame {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.6rem);
}

.page-about .about-hero__title {
  max-width: 22ch;
  margin: 0;
}

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

.page-about .about-hero__anchors {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem clamp(.6rem, 2vw, 1.4rem);
  margin: clamp(.4rem, 1.5vw, 1rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
  padding-top: clamp(.9rem, 2vw, 1.35rem);
}

.page-about .about-anchor {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  padding: .3rem 0;
  color: var(--rc-silver-2);
  text-decoration: none;
  font-size: .9rem;
  border-bottom: 1px solid transparent;
  transition: color 220ms var(--rc-ease), border-color 220ms var(--rc-ease);
}

.page-about .about-anchor__num {
  font-family: var(--rc-font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--rc-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-anchor:hover,
.page-about .about-anchor:focus-visible {
  color: var(--rc-ivory);
  border-bottom-color: var(--rc-gold);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(.6rem, 2vw, 1.2rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--rc-line);
  border: var(--about-rule);
}

.page-about .about-stat {
  display: grid;
  gap: .4rem;
  align-content: start;
  padding: clamp(.85rem, 2.2vw, 1.3rem);
  background: var(--rc-void);
}

.page-about .about-stat__val {
  font-family: var(--rc-font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  line-height: 1;
  color: var(--rc-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__key {
  font-family: var(--rc-font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--rc-silver-2);
}

@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* ---------- 机构自述 ---------- */

.page-about .about-narrative {
  padding-block: var(--about-pad-y);
  border-top: var(--about-rule);
}

.page-about .about-narrative__frame {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-narrative__side {
  display: grid;
  gap: .7rem;
  align-content: start;
}

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

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

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

@media (min-width: 1024px) {
  .page-about .about-narrative__frame {
    grid-template-columns: minmax(80px, 0.5fr) minmax(0, 1.85fr) minmax(0, 1.05fr);
    grid-template-areas: "side .page-about figure";
    align-items: start;
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-narrative__side {
    grid-area: side;
    position: sticky;
    top: calc(var(--rc-header-h-compact) + 1.75rem);
  }

  .page-about .about-narrative__body {
    grid-area: body;
  }

  .page-about .about-narrative__figure {
    grid-area: figure;
  }
}

/* ---------- 发展历程 ---------- */

.page-about .about-timeline {
  padding-block: var(--about-pad-y);
  background: var(--rc-void-2);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .about-timeline__head {
  max-width: 68ch;
}

.page-about .about-timeline__lede {
  margin-top: .9rem;
}

.page-about .about-timeline__figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

.page-about .about-timeline__list {
  display: grid;
  margin: clamp(2rem, 4.5vw, 3.2rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-timeline__item {
  display: grid;
  gap: .5rem;
  padding-block: clamp(1.15rem, 2.6vw, 1.9rem);
  border-bottom: var(--about-rule);
}

.page-about .about-timeline__year {
  font-family: var(--rc-font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.4rem);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--rc-gold);
  font-variant-numeric: tabular-nums;
}

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

.page-about .about-timeline__title {
  margin: 0 0 .55rem;
  font-family: var(--rc-font-display);
  font-weight: 600;
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  line-height: 1.35;
  color: var(--rc-ivory);
}

.page-about .about-timeline__content p {
  margin: 0;
  color: var(--rc-silver-2);
  line-height: 1.75;
  max-width: 62ch;
}

.page-about .about-timeline__content a {
  color: var(--rc-gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--rc-line-gold);
}

.page-about .about-timeline__content a:hover,
.page-about .about-timeline__content a:focus-visible {
  color: var(--rc-ivory);
  border-bottom-color: var(--rc-gold);
}

.page-about .about-num {
  font-family: var(--rc-font-mono);
  font-weight: 500;
  color: var(--rc-gold);
  letter-spacing: .04em;
}

@media (min-width: 720px) {
  .page-about .about-timeline__item {
    grid-template-columns: var(--about-side-width) minmax(0, 1fr);
    gap: clamp(1.25rem, 3vw, 2.5rem);
    align-items: baseline;
  }

  .page-about .about-timeline__item > .about-timeline__year {
    justify-self: start;
    padding-right: clamp(.8rem, 2vw, 1.5rem);
    border-right: var(--about-rule-gold);
    min-height: 2.2rem;
  }
}

/* ---------- 团队构成 ---------- */

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

.page-about .about-team__lede {
  margin-top: .9rem;
  max-width: 62ch;
}

.page-about .about-team__band {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  background: var(--rc-line);
  border: var(--about-rule);
}

.page-about .about-team__group {
  display: grid;
  gap: .55rem;
  align-content: start;
  padding: clamp(1.2rem, 3vw, 2rem);
  background: var(--rc-card);
  transition: transform 260ms var(--rc-ease), box-shadow 260ms var(--rc-ease);
}

.page-about .about-team__group:hover {
  transform: translateY(-2px);
  box-shadow: var(--rc-shadow);
}

.page-about .about-team__meter {
  display: block;
  height: 3px;
  background: var(--rc-gold);
}

.page-about .about-team__meter--a { width: 35.3%; }
.page-about .about-team__meter--b { width: 45.6%; }
.page-about .about-team__meter--c { width: 19.1%; }

.page-about .about-team__count {
  font-family: var(--rc-font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1;
  color: var(--rc-gold-hi);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--rc-font-display);
  font-weight: 600;
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  color: var(--rc-ivory);
}

.page-about .about-team__desc {
  margin: 0;
  color: var(--rc-silver-2);
  font-size: .95rem;
  line-height: 1.75;
}

.page-about .about-team__figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

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

/* ---------- 区域共建 ---------- */

.page-about .about-partners {
  padding-block: var(--about-pad-y);
  background: var(--rc-void-2);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .about-partners__frame {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-partners__aside {
  display: grid;
  gap: .7rem;
  align-content: start;
}

.page-about .about-partners__lede {
  margin: 0 0 clamp(1.5rem, 3.5vw, 2.25rem);
  max-width: 60ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.8;
  color: var(--rc-silver-2);
}

.page-about .about-partners__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--rc-line);
  border: var(--about-rule);
}

.page-about .about-partners__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(.9rem, 2.5vw, 1.75rem);
  align-items: start;
  padding: clamp(1.1rem, 3vw, 1.75rem);
  background: var(--rc-void-2);
}

.page-about .about-partners__idx {
  font-family: var(--rc-font-mono);
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--rc-gold);
  padding-top: .28rem;
}

.page-about .about-partners__title {
  margin: 0 0 .45rem;
  font-family: var(--rc-font-display);
  font-weight: 600;
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--rc-ivory);
}

.page-about .about-partners__item p {
  margin: 0;
  color: var(--rc-silver-2);
  font-size: .95rem;
  line-height: 1.78;
}

@media (min-width: 1024px) {
  .page-about .about-partners__frame {
    grid-template-columns: minmax(80px, 0.7fr) minmax(0, 2.3fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-partners__aside {
    position: sticky;
    top: calc(var(--rc-header-h-compact) + 1.75rem);
  }
}

/* ---------- 条目复核 ---------- */

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

.page-about .about-review__lede {
  margin-top: .9rem;
  max-width: 62ch;
}

.page-about .about-review__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  background: var(--rc-line);
  border: var(--about-rule);
}

.page-about .about-review__card {
  display: grid;
  gap: .55rem;
  align-content: start;
  padding: clamp(1.2rem, 3vw, 1.9rem);
  background: var(--rc-void);
  border-top: 2px solid var(--rc-line-gold);
}

.page-about .about-review__val {
  font-family: var(--rc-font-mono);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  letter-spacing: .04em;
  color: var(--rc-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-review__name {
  margin: 0;
  font-family: var(--rc-font-display);
  font-weight: 600;
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--rc-ivory);
}

.page-about .about-review__card p {
  margin: 0;
  color: var(--rc-silver-2);
  font-size: .95rem;
  line-height: 1.75;
}

@media (min-width: 860px) {
  .page-about .about-review__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 订阅档案 ---------- */

.page-about .about-subscribe {
  padding-block: var(--about-pad-y);
  background: var(--rc-card);
  border-top: var(--about-rule);
}

.page-about .about-subscribe__frame {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-subscribe__aside {
  display: grid;
  gap: .7rem;
  align-content: start;
}

.page-about .about-subscribe__note {
  margin: .25rem 0 0;
  font-family: var(--rc-font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  line-height: 1.8;
  color: var(--rc-silver);
}

.page-about .about-subscribe__topics {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--rc-line);
  border: var(--about-rule);
}

.page-about .about-topic {
  display: grid;
  gap: .45rem;
  align-content: start;
  padding: clamp(1.1rem, 2.6vw, 1.6rem);
  background: var(--rc-void);
}

.page-about .about-topic__num {
  font-family: var(--rc-font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--rc-violet);
}

.page-about .about-topic__name {
  margin: 0;
  font-family: var(--rc-font-display);
  font-weight: 600;
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--rc-ivory);
}

.page-about .about-topic p {
  margin: 0;
  color: var(--rc-silver-2);
  font-size: .95rem;
  line-height: 1.75;
}

.page-about .about-subscribe__cta {
  display: grid;
  gap: 1.1rem;
  justify-items: start;
  margin-top: clamp(1.4rem, 3vw, 2rem);
  padding-top: clamp(1.2rem, 3vw, 1.75rem);
  border-top: var(--about-rule);
}

.page-about .about-subscribe__cta p {
  margin: 0;
  max-width: 54ch;
  color: var(--rc-silver-2);
  line-height: 1.8;
}

@media (min-width: 860px) {
  .page-about .about-subscribe__topics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .about-subscribe__frame {
    grid-template-columns: minmax(80px, 0.85fr) minmax(0, 2.15fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }
}

/* ---------- 收束引文 ---------- */

.page-about .about-quote {
  padding-block: clamp(3rem, 8vw, 6rem);
  background: var(--rc-night);
  border-top: var(--about-rule-gold);
}

.page-about .about-quote__frame {
  display: grid;
  gap: 1.25rem;
  justify-items: start;
}

.page-about .about-quote__text {
  margin: 0;
  max-width: 30ch;
  font-family: var(--rc-font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 4vw, 2.75rem);
  line-height: 1.35;
  letter-spacing: .01em;
  color: var(--rc-ivory);
  position: relative;
  padding-left: clamp(1rem, 3vw, 1.75rem);
  border-left: 2px solid var(--rc-gold);
}

.page-about .about-quote__meta {
  margin: 0;
  font-family: var(--rc-font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--rc-silver);
}

/* ---------- 滚动显现 ---------- */

@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal].is-visible {
    animation: about-rise 460ms var(--rc-ease) both;
  }

  .page-about .about-timeline__item:nth-child(2).is-visible { animation-delay: 70ms; }
  .page-about .about-timeline__item:nth-child(3).is-visible { animation-delay: 140ms; }
  .page-about .about-timeline__item:nth-child(4).is-visible { animation-delay: 210ms; }
  .page-about .about-timeline__item:nth-child(5).is-visible { animation-delay: 280ms; }

  .page-about .about-team__group:nth-child(2).is-visible { animation-delay: 80ms; }
  .page-about .about-team__group:nth-child(3).is-visible { animation-delay: 160ms; }

  .page-about .about-review__card:nth-child(2).is-visible { animation-delay: 80ms; }
  .page-about .about-review__card:nth-child(3).is-visible { animation-delay: 160ms; }
}

@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 窄屏保障 ---------- */

@media (max-width: 719px) {
  .page-about .about-timeline__year {
    font-size: 1.7rem;
  }

  .page-about .about-hero__stats {
    border-left: 0;
    border-right: 0;
  }
}