.page-about {
  --about-lead: 42px;
  --about-gap: clamp(40px, 7vw, 84px);
  padding-bottom: 88px;
}

.page-about .breadcrumbs {
  padding-top: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 30px;
  padding: 28px 0 0;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(34px, 8.6vw, 88px);
  line-height: 1.04;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: var(--f-15);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
}

.page-about .about-hero__stat {
  padding-left: 13px;
  border-left: 1px solid var(--line);
}

.page-about .about-hero__num {
  display: block;
  font-size: var(--f-24);
  line-height: 1.2;
  color: var(--cyan);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 4px;
  font-size: var(--f-12);
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

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

/* ---------- 章节导航 ---------- */
.page-about .about-toc {
  display: flex;
  gap: 8px;
  margin-top: 36px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  flex: 0 0 auto;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  font-family: var(--mono);
  font-size: var(--f-12);
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

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

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: var(--about-gap) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-head__idx {
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: var(--f-12);
  letter-spacing: 0.28em;
  color: var(--cyan);
  padding-top: 6px;
}

.page-about .about-head__title {
  margin: 0;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-head__sub {
  margin: 10px 0 0;
  font-size: var(--f-14);
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-body {
  margin-top: 26px;
  max-width: 34em;
  font-size: var(--f-15);
  line-height: 1.8;
  color: var(--white);
}

.page-about .about-body p {
  margin: 0 0 16px;
}

.page-about .about-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 非对称分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .about-split__main p {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--f-15);
  line-height: 1.8;
  color: var(--white);
}

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

/* ---------- 联赛结构图 ---------- */
.page-about .about-map {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-map__label {
  fill: var(--mist);
  font-family: var(--sans);
  font-size: 20px;
}

.page-about .about-map__num {
  fill: var(--white);
  font-family: var(--mono);
  font-size: 26px;
}

.page-about .about-map__rail {
  fill: var(--deck);
}

.page-about .about-map__fill--foot {
  fill: var(--cyan);
}

.page-about .about-map__fill--basket {
  fill: var(--orange);
}

.page-about .about-map__foot {
  fill: var(--mist);
  font-family: var(--sans);
  font-size: 17px;
}

/* ---------- 说明牌小组 ---------- */
.page-about .about-panels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-panel {
  padding: 16px 18px;
  background: var(--deck);
  border: 1px solid var(--line);
  border-radius: var(--r);
}

.page-about .about-panel__idx {
  display: block;
  font-size: var(--f-12);
  color: var(--cyan);
}

.page-about .about-panel__title {
  margin: 8px 0 0;
  font-size: var(--f-18);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-panel__text {
  margin: 8px 0 0;
  font-size: var(--f-14);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 说明牌卡片 ---------- */
.page-about .about-cards {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-card {
  background: var(--section);
  transition: border-color 0.16s ease, transform 0.16s ease;
}

.page-about .about-card:hover,
.page-about .about-card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 团队 ---------- */
.page-about .about-team-wrap {
  margin-top: 26px;
  display: grid;
  gap: 26px;
}

.page-about .about-team-main p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: var(--f-15);
  line-height: 1.8;
  color: var(--white);
}

.page-about .about-team-main p:last-child {
  margin-bottom: 0;
}

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

.page-about .about-team-grid {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-team-card {
  padding: 18px;
  background: var(--deck);
  border: 1px solid var(--line);
  border-radius: var(--r);
  transition: border-color 0.16s ease, transform 0.16s ease, background-color 0.16s ease;
}

.page-about .about-team-card:hover,
.page-about .about-team-card:focus-within,
.page-about .about-team-card:focus {
  border-color: var(--cyan);
  transform: translateY(-2px);
  background: var(--section);
}

.page-about .about-team-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-team-card__idx {
  display: block;
  font-size: var(--f-12);
  color: var(--cyan);
  letter-spacing: 0.14em;
}

.page-about .about-team-card__name {
  margin: 10px 0 0;
  font-size: var(--f-18);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-team-card__duty {
  margin: 6px 0 0;
  font-size: var(--f-12);
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-about .about-team-card__text {
  margin: 10px 0 0;
  font-size: var(--f-14);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 赛季时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 4px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(127, 231, 208, 0.12);
  transition: background-color 0.16s ease, box-shadow 0.16s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before,
.page-about .about-timeline__item:focus::before {
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 122, 47, 0.16);
}

.page-about .about-timeline__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-timeline__stage {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  font-size: var(--f-12);
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-timeline__title {
  margin: 10px 0 0;
  font-size: var(--f-18);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-timeline__detail {
  margin: 8px 0 0;
  max-width: 32em;
  font-size: var(--f-14);
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-split--timeline .about-split__side {
  align-self: start;
}

/* ---------- 合作 ---------- */
.page-about .about-inline-link {
  margin: 22px 0 0;
  font-size: var(--f-14);
}

/* ---------- 做事方式 ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-rule {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 18px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rule:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-rule__num {
  grid-row: 1 / span 2;
  font-size: var(--f-32);
  line-height: 1.1;
  color: var(--cyan-deep);
}

.page-about .about-rule__title {
  margin: 0;
  font-size: var(--f-18);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-rule__text {
  margin: 4px 0 0;
  max-width: 34em;
  font-size: var(--f-14);
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: var(--about-gap);
  padding: 56px 0 64px;
  background: var(--section);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 5vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 32em;
  font-size: var(--f-15);
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-cta__actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__links {
  margin: 22px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: var(--f-14);
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 26px;
  }

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

  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-rule {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-rule__num {
    grid-row: auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--gutter);
    align-items: end;
    padding-top: 48px;
  }

  .page-about .about-body,
  .page-about .about-split,
  .page-about .about-team-wrap,
  .page-about .about-team-grid,
  .page-about .about-cards,
  .page-about .about-rules {
    margin-left: var(--about-lead);
  }

  .page-about .about-body {
    max-width: 40em;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--gutter);
  }

  .page-about .about-split--timeline {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-team-wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--gutter);
    align-items: start;
  }

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

  .page-about .about-cards {
    gap: 22px;
  }

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

  .page-about .about-rules {
    grid-template-columns: minmax(0, 1fr);
    max-width: 62em;
  }

  .page-about .about-cta {
    padding: 72px 0 80px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__title {
    max-width: 12em;
  }

  .page-about .about-timeline__item {
    padding-bottom: 34px;
  }
}