.page-about {
  --about-rail: 132px;
  --about-soft: rgba(168, 179, 176, 0.22);
  background:
    radial-gradient(115% 55% at 84% -8%, rgba(31, 111, 74, 0.34), transparent 62%),
    radial-gradient(85% 45% at -8% 28%, rgba(46, 31, 94, 0.40), transparent 66%),
    var(--wh-ink);
  color: var(--wh-mist);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 面包屑间距 ---------- */
.page-about .wh-crumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(1.25rem, 4vw, 2.25rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3.25rem);
}

.page-about .about-hero__title {
  margin: 0.6rem 0 1.1rem;
  font-size: clamp(2rem, 8.4vw, 5.4rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--wh-mist);
  overflow-wrap: anywhere;
}

.page-about .about-hero__lead {
  margin: 0;
  color: var(--wh-gray);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--wh-line-soft);
  border: 1px solid var(--wh-line-soft);
  border-radius: var(--wh-radius-md);
  overflow: hidden;
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.95rem 1rem 1.05rem;
  background: rgba(7, 30, 26, 0.92);
}

.page-about .about-hero__statnum {
  font-family: var(--wh-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.35rem, 4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--wh-yellow);
}

.page-about .about-hero__statlabel {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--wh-gray);
}

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

.page-about .about-hero__figure .wh-figure__frame {
  border-radius: var(--wh-radius-lg);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(2.5rem, 6vw, 4.25rem);
  border-top: 1px solid var(--wh-line);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 3vw, 2.25rem);
}

.page-about .about-chapter__index .wh-index {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}

.page-about .about-chapter__title {
  margin: 0 0 1rem;
  font-size: clamp(1.5rem, 4.6vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--wh-mist);
}

.page-about .about-chapter__body > .wh-prose {
  margin: 0 0 clamp(1.5rem, 3.5vw, 2.25rem);
  color: var(--wh-gray);
}

.page-about .about-chapter__body > .wh-prose:last-child {
  margin-bottom: 0;
}

.page-about .about-chapter .wh-card {
  margin: 0;
}

.page-about .about-chapter .wh-grid {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ---------- 01 收录范围 ---------- */
.page-about .about-scope .wh-card__body {
  margin: 0.55rem 0 0;
  color: var(--wh-gray);
  font-size: 0.9375rem;
}

.page-about .about-scope .wh-card__foot {
  margin: 0.9rem 0 0;
  font-family: var(--wh-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--wh-mint);
}

/* ---------- 02 编辑团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-team__item {
  position: relative;
  padding: 1.2rem 1.2rem 1.35rem;
  background: rgba(14, 42, 71, 0.6);
  border: 1px solid var(--wh-line);
  border-radius: var(--wh-radius-md);
  transition: transform 0.28s var(--wh-ease), border-color 0.28s var(--wh-ease);
}

.page-about .about-team__item:nth-child(2) {
  background: rgba(31, 111, 74, 0.34);
}

.page-about .about-team__item:nth-child(3) {
  background: rgba(92, 31, 43, 0.36);
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  transform: translateY(-4px);
  border-color: var(--wh-yellow);
}

.page-about .about-team__title {
  margin: 0.5rem 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--wh-mist);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--wh-gray);
}

/* ---------- 03 流程带 ---------- */
.page-about .about-method {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid var(--wh-line);
  border-bottom: 1px solid var(--wh-line);
  background:
    linear-gradient(160deg, rgba(46, 31, 94, 0.62), rgba(11, 43, 38, 0.94) 68%);
}

.page-about .about-method__head {
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-method__head .about-chapter__title {
  margin-top: 0.5rem;
}

.page-about .about-method__head .wh-prose {
  margin: 0;
  color: var(--wh-gray);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

.page-about .about-flow__step {
  position: relative;
  padding: 1.35rem 1.15rem 1.5rem;
  background: rgba(7, 30, 26, 0.72);
  border: 1px solid var(--wh-line);
  border-radius: var(--wh-radius-md);
  transition: transform 0.3s var(--wh-ease), border-color 0.3s var(--wh-ease);
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  right: 1.15rem;
  top: -1px;
  height: 3px;
  border-radius: 3px;
  background: var(--wh-grass);
}

.page-about .about-flow__step:nth-child(2)::before { background: #37946A; }
.page-about .about-flow__step:nth-child(3)::before { background: var(--wh-yellow); }
.page-about .about-flow__step:nth-child(4)::before { background: var(--wh-mint); }

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  transform: translateY(-4px);
  border-color: var(--wh-yellow);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--wh-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--wh-yellow);
}

.page-about .about-flow__title {
  margin: 0.35rem 0 0.55rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--wh-mist);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--wh-gray);
}

.page-about .about-method__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

.page-about .about-method__figure .wh-figure__frame {
  border-radius: var(--wh-radius-lg);
}

/* ---------- 04 编号拆解 ---------- */
.page-about .about-code {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
  font-family: var(--wh-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.15rem, 4.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
}

.page-about .about-code__seg {
  padding: 0.42em 0.6em;
  border-radius: var(--wh-radius-sm);
  background: var(--wh-archive);
  border: 1px solid var(--wh-line);
  color: var(--wh-mist);
  transition: background 0.24s var(--wh-ease), color 0.24s var(--wh-ease),
    transform 0.24s var(--wh-ease), border-color 0.24s var(--wh-ease);
}

.page-about .about-code__seg--league:hover { background: var(--wh-grass); border-color: var(--wh-mint); }
.page-about .about-code__seg--season:hover { background: var(--wh-indigo); border-color: var(--wh-mint); }
.page-about .about-code__seg--club:hover { background: var(--wh-wine); border-color: var(--wh-yellow); }
.page-about .about-code__seg--serial:hover { background: var(--wh-yellow); color: var(--wh-ink); border-color: var(--wh-yellow); }

.page-about .about-code__seg:hover {
  transform: translateY(-3px);
}

.page-about .about-code__dash {
  color: var(--wh-gray);
  opacity: 0.7;
}

.page-about .about-code__legend {
  margin: 0;
  display: grid;
  gap: 1px;
  padding: 1px;
  background: var(--wh-line-soft);
  border: 1px solid var(--wh-line-soft);
  border-radius: var(--wh-radius-md);
  overflow: hidden;
}

.page-about .about-code__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: 0.95rem 1.05rem;
  background: rgba(7, 30, 26, 0.9);
}

.page-about .about-code__row dt {
  font-family: var(--wh-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--wh-yellow);
}

.page-about .about-code__row dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--wh-gray);
}

/* ---------- 05 发展历程 ---------- */
.page-about .about-history__head {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-about .about-history__badge {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0;
}

.page-about .about-history__badge .wh-num {
  line-height: 0.9;
}

.page-about .about-history__head .about-chapter__title {
  margin-bottom: 0.35rem;
}

.page-about .about-chapter__body > .about-history__head + .wh-prose {
  margin-top: 0.35rem;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--wh-grass), var(--wh-yellow) 55%, var(--wh-indigo));
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 2rem;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0.26rem;
  top: 1rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--wh-yellow);
  box-shadow: 0 0 0 4px rgba(247, 201, 72, 0.14);
}

.page-about .about-timeline__node {
  background: rgba(14, 42, 71, 0.52);
  border: 1px solid var(--wh-line);
  border-radius: var(--wh-radius-md);
  transition: border-color 0.26s var(--wh-ease), background 0.26s var(--wh-ease);
}

.page-about .about-timeline__node:hover,
.page-about .about-timeline__node:focus-within {
  border-color: rgba(247, 201, 72, 0.7);
}

.page-about .about-timeline__node[open] {
  background: rgba(31, 111, 74, 0.3);
  border-color: rgba(127, 227, 176, 0.45);
}

.page-about .about-timeline__node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.05rem;
  cursor: pointer;
  list-style: none;
  border-radius: var(--wh-radius-md);
}

.page-about .about-timeline__node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--wh-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--wh-yellow);
}

.page-about .about-timeline__node[open] summary::after {
  content: "–";
}

.page-about .about-timeline__node summary:focus-visible {
  outline: 2px solid var(--wh-yellow);
  outline-offset: 2px;
}

.page-about .about-chip {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: var(--wh-yellow-soft);
  border: 1px solid rgba(247, 201, 72, 0.4);
  font-family: var(--wh-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--wh-yellow);
}

.page-about .about-timeline__label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--wh-mist);
}

.page-about .about-timeline__body {
  margin: 0;
  padding: 0 1.05rem 1.1rem;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--wh-gray);
}

.page-about .about-history__figure {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
}

.page-about .about-history__figure .wh-figure__frame {
  border-radius: var(--wh-radius-lg);
}

/* ---------- 06 内容互推 ---------- */
.page-about .about-partners .wh-card__body {
  margin: 0.55rem 0 0;
  color: var(--wh-gray);
  font-size: 0.9375rem;
}

/* ---------- 07 入口 ---------- */
.page-about .about-chapter--entry {
  border-bottom: 1px solid var(--wh-line);
}

.page-about .about-entry {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 尾部 ---------- */
.page-about .about-tail {
  display: flex;
  justify-content: flex-end;
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-code__row {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 150px;
  }

  .page-about .about-hero {
    padding-block: clamp(2rem, 5vw, 3.25rem) clamp(3rem, 6vw, 5rem);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.72fr);
    align-items: end;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-about .about-chapter__index .wh-index {
    flex-direction: column;
    gap: 0.3rem;
  }

  .page-about .about-chapter__index {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

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

  .page-about .about-team__item:nth-child(2) {
    transform: translateY(1.1rem);
  }

  .page-about .about-team__item:nth-child(2):hover {
    transform: translateY(calc(1.1rem - 4px));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-flow__step {
    border-radius: 0;
    border-right-width: 0;
    padding-inline: 1.05rem;
  }

  .page-about .about-flow__step:first-child {
    border-top-left-radius: var(--wh-radius-md);
    border-bottom-left-radius: var(--wh-radius-md);
  }

  .page-about .about-flow__step:last-child {
    border-right-width: 1px;
    border-top-right-radius: var(--wh-radius-md);
    border-bottom-right-radius: var(--wh-radius-md);
  }

  .page-about .about-flow__step::before {
    left: 0;
    right: 0;
    border-radius: 0;
  }

  .page-about .about-flow__step:first-child::before {
    border-top-left-radius: 3px;
  }

  .page-about .about-flow__step:last-child::before {
    border-top-right-radius: 3px;
  }

  .page-about .about-history__head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 2rem;
  }

  .page-about .about-history__head .about-chapter__title {
    flex: 1 1 auto;
    max-width: 30ch;
    margin-bottom: 0;
  }

  .page-about .about-history__badge {
    flex: 0 0 auto;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.15rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__figure {
    margin-bottom: -1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__item,
  .page-about .about-flow__step,
  .page-about .about-code__seg,
  .page-about .about-timeline__node {
    transition: none;
  }
  .page-about .about-team__item:hover,
  .page-about .about-flow__step:hover,
  .page-about .about-code__seg:hover {
    transform: none;
  }
  .page-about .about-team__item:nth-child(2) {
    transform: none;
  }
  .page-about .about-team__item:nth-child(2):hover {
    transform: none;
  }
}