.page-about {
  --about-hair: rgba(16, 26, 38, .12);
  --about-quote-bar: var(--action);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: clamp(1rem, 3vw, 1.7rem);
}

.page-about .about-crumb .breadcrumb__list {
  margin: 0;
}

/* ---------- 封面首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(1.1rem, 3vw, 2rem) clamp(2.2rem, 5.5vw, 4rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.8rem);
  align-items: end;
}

.page-about .about-hero__kicker {
  color: var(--blue);
  margin: 0 0 .85rem;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.03em;
  line-height: .95;
  font-size: clamp(2.05rem, 7.6vw, 4.3rem);
  color: var(--blue-deep);
  margin: 0 0 1.1rem;
  max-width: 15ch;
}

.page-about .about-hero__lede {
  font-family: var(--font-editorial);
  font-weight: 300;
  font-size: clamp(1.06rem, 2.3vw, 1.42rem);
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 36ch;
  margin: 0 0 1.4rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}

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

.page-about .about-hero__figure .media-frame {
  box-shadow: var(--shadow-lift);
}

.page-about .about-hero__caption {
  display: block;
  margin-top: .65rem;
  color: var(--ink-mute);
  font-size: 12px;
  letter-spacing: .05em;
}

/* ---------- 长文与注释双栏 ---------- */
.page-about .about-doc {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.2rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

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

.page-about .about-chapter {
  scroll-margin-top: 96px;
}

.page-about .about-chapter + .about-chapter {
  margin-top: clamp(2.3rem, 5vw, 3.5rem);
}

.page-about .about-chapter__no {
  display: block;
  color: var(--blue);
  margin: 0 0 .55rem;
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.08;
  font-size: clamp(1.4rem, 3.4vw, 2.05rem);
  color: var(--blue-deep);
  margin: 0 0 1.15rem;
  max-width: 22ch;
}

.page-about .about-chapter p {
  font-size: clamp(.98rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
  color: var(--ink-soft);
  margin: 0 0 1.05rem;
  max-width: 62ch;
}

.page-about .about-chapter p a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-chapter p a:hover {
  color: var(--action-deep);
}

.page-about .about-chapter__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.4rem;
}

/* ---------- 索引列表 ---------- */
.page-about .about-index {
  margin: 1.4rem 0 1.5rem;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-index .index-list__item {
  border-bottom: 1px solid var(--about-hair);
}

/* ---------- 引语 ---------- */
.page-about .about-quote {
  margin: clamp(2.1rem, 4.6vw, 3.1rem) 0;
  padding: .2rem 0 .2rem clamp(1.05rem, 3vw, 1.6rem);
  border-left: 3px solid var(--about-quote-bar);
  font-family: var(--font-editorial);
  font-weight: 300;
  font-size: clamp(1.2rem, 2.8vw, 1.72rem);
  line-height: 1.5;
  color: var(--blue-deep);
  max-width: 24ch;
}

/* ---------- 团队人形网格 ---------- */
.page-about .about-roster {
  list-style: none;
  margin: 1.4rem 0 1.6rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: .55rem;
}

.page-about .about-roster__group {
  display: grid;
  grid-template-columns: 5.2rem minmax(0, 1fr) auto;
  align-items: center;
  gap: .7rem;
  padding: .6rem .75rem;
  background: var(--warm);
  border-left: 2px solid var(--glaze);
}

.page-about .about-roster__label {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--ink);
}

.page-about .about-roster__pips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.page-about .about-roster__pip {
  width: 10px;
  height: 10px;
  border-radius: 1px;
  background: var(--blue-soft);
}

.page-about .about-roster__group:nth-child(2) .about-roster__pip {
  background: var(--l-league-3);
}

.page-about .about-roster__group:nth-child(3) .about-roster__pip {
  background: var(--l-league-4);
}

.page-about .about-roster__group:nth-child(4) .about-roster__pip {
  background: var(--l-league-6);
}

.page-about .about-roster__num {
  font-size: 13px;
  color: var(--ink-mute);
}

/* ---------- 章节配图 ---------- */
.page-about .about-stagefig {
  margin: 1.6rem 0 1.5rem;
}

.page-about .about-stagefig__cap {
  display: block;
  margin-top: .55rem;
  font-size: 12px;
  color: var(--ink-mute);
  letter-spacing: .04em;
}

/* ---------- 时间刻度 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 1.8rem 0 1.6rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 1.25rem 1rem 1.05rem;
  background: var(--warm);
  border-top: 3px solid var(--glaze);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-visible,
.page-about .about-timeline__item:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-timeline__item:hover .about-timeline__note,
.page-about .about-timeline__item:focus-within .about-timeline__note {
  color: var(--action-deep);
  border-top-color: var(--action);
}

.page-about .about-timeline__item:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-about .about-timeline__dot {
  position: absolute;
  top: -10px;
  left: 1rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--paper);
}

.page-about .about-timeline__dot--1 {
  background: var(--l-league-1);
}

.page-about .about-timeline__dot--2 {
  background: var(--l-league-3);
}

.page-about .about-timeline__dot--3 {
  background: var(--l-league-4);
}

.page-about .about-timeline__year {
  margin: 0 0 .35rem;
  font-size: 13px;
  color: var(--blue);
  letter-spacing: .08em;
}

.page-about .about-timeline__name {
  margin: 0 0 .5rem;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__desc {
  margin: 0 0 .7rem;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-timeline__note {
  margin: 0;
  padding-top: .6rem;
  border-top: 1px dashed var(--hairline);
  font-size: .82rem;
  line-height: 1.6;
  color: var(--ink-mute);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

/* ---------- 右侧注释列 ---------- */
.page-about .about-aside {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  min-width: 0;
}

.page-about .about-aside__block {
  padding: 1rem 0 1rem 1rem;
  border-left: 2px solid var(--glaze);
  background: linear-gradient(90deg, rgba(159, 195, 214, .16), transparent 70%);
}

.page-about .about-aside__title {
  margin: 0 0 .7rem;
  color: var(--blue-deep);
}

.page-about .about-figures {
  margin: 0;
  display: grid;
  gap: .38rem;
}

.page-about .about-figures__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .8rem;
  padding-bottom: .34rem;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-figures__row dt {
  font-size: .82rem;
  color: var(--ink-mute);
  letter-spacing: .04em;
}

.page-about .about-figures__row dd {
  margin: 0;
  font-size: 13px;
  color: var(--blue-deep);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .about-aside__version {
  margin: .8rem 0 0;
  font-size: .82rem;
  color: var(--ink-mute);
}

.page-about .about-aside__version .data {
  color: var(--blue);
}

.page-about .about-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-about .about-links__item {
  display: block;
  padding: .42rem .1rem;
  font-size: .86rem;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-links__item:hover,
.page-about .about-links__item:focus-visible {
  color: var(--action-deep);
  border-bottom-color: var(--action);
  padding-left: .28rem;
}

.page-about .about-links__item:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 599px) {
  .page-about .about-quote {
    max-width: none;
  }

  .page-about .about-roster__group {
    grid-template-columns: 4.4rem minmax(0, 1fr) auto;
    gap: .55rem;
  }

  .page-about .about-roster__pip {
    width: 9px;
    height: 9px;
  }
}

/* ---------- 桌面：7 / 3 非对称双栏 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .82fr);
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-about .about-doc {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    column-gap: clamp(2rem, 3.6vw, 3.6rem);
    align-items: start;
  }

  .page-about .about-aside {
    position: sticky;
    top: clamp(1.4rem, 4vh, 2.4rem);
    align-self: start;
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }

  .page-about .about-roster {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-links__item,
  .page-about .about-timeline__note {
    transition: none;
  }

  .page-about .about-timeline__item:hover,
  .page-about .about-timeline__item:focus-within {
    transform: none;
  }
}