.page-about {
  --ab-rule: rgba(19, 19, 24, .16);
  --ab-rule-soft: rgba(19, 19, 24, .09);
  background: var(--paper);
  color: var(--ink);
}

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

.page-about .breadcrumbs {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 封面 ---------- */

.page-about .about-cover {
  padding: clamp(18px, 2.6vw, 34px) 0 clamp(36px, 5vw, 68px);
}

.page-about .about-cover__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  }
}

.page-about .about-cover__title {
  margin: 14px 0 0;
  font-size: clamp(34px, 8vw, 100px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
}

.page-about .about-cover__accent {
  display: block;
  color: var(--jade);
}

.page-about .about-cover__lede {
  max-width: 46ch;
  margin: 22px 0 0;
  font-size: clamp(16px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-cover__facts {
  margin: 30px 0 0;
  border-top: 1px solid var(--ab-rule);
}

.page-about .about-fact {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--ab-rule-soft);
}

.page-about .about-fact dt {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

.page-about .about-fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
}

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

.page-about .about-cover__figure .figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* ---------- 双栏正文骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--ab-rule);
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: minmax(180px, 24%) minmax(0, 1fr);
  }
}

.page-about .about-index {
  padding: clamp(24px, 3vw, 40px) 0 0;
}

@media (min-width: 1000px) {
  .page-about .about-index {
    padding: clamp(36px, 4vw, 56px) clamp(22px, 2.6vw, 44px) clamp(36px, 4vw, 56px) 0;
    border-right: 1px solid var(--ab-rule);
  }

  .page-about .about-index__inner {
    position: sticky;
    top: calc(var(--header-h) + 30px);
  }
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--ink-soft);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__list li + li {
  border-top: 1px solid var(--ab-rule-soft);
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 14.5px;
  color: var(--ink);
  text-decoration: none;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--jade);
  padding-left: 4px;
}

.page-about .about-index__list .mono {
  flex: none;
  font-size: 11px;
  color: var(--track);
}

.page-about .about-scale {
  margin-top: clamp(24px, 3vw, 38px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-scale__ruler {
  display: block;
  width: 22px;
  height: 128px;
  border-left: 2px solid var(--jade);
  background: repeating-linear-gradient(
    to bottom,
    var(--rule) 0 1px,
    transparent 1px 18px
  );
}

.page-about .about-scale__cap {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-soft);
}

.page-about .about-article {
  padding: 0 0 clamp(40px, 6vw, 80px);
}

@media (min-width: 1000px) {
  .page-about .about-article {
    padding: clamp(36px, 4vw, 56px) 0 clamp(48px, 6vw, 88px) clamp(24px, 3.4vw, 60px);
  }
}

/* ---------- 章节 ---------- */

.page-about .chapter {
  padding: clamp(30px, 4.2vw, 52px) 0;
  border-bottom: 1px solid var(--ab-rule-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .chapter:first-child {
  padding-top: clamp(26px, 3vw, 40px);
}

.page-about .chapter:last-child {
  border-bottom: 0;
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  margin-bottom: clamp(16px, 2vw, 24px);
}

.page-about .chapter-index {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.8vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--jade);
}

.page-about .chapter__title {
  margin: 0;
  font-size: clamp(21px, 2.9vw, 32px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.01em;
}

.page-about .chapter__body > p {
  max-width: 66ch;
  margin: 0 0 1.05em;
  font-size: var(--fs-body);
  line-height: 1.78;
}

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

/* ---------- 数字条 ---------- */

.page-about .fact-row {
  list-style: none;
  margin: clamp(22px, 2.6vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-rule-soft);
  border: 1px solid var(--ab-rule-soft);
}

@media (min-width: 760px) {
  .page-about .fact-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .fact-row__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2vw, 22px) clamp(12px, 1.6vw, 18px);
  background: var(--paper);
}

.page-about .fact-row__k {
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--jade-deep);
}

.page-about .fact-row__v {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
}

/* ---------- 图片 ---------- */

.page-about .chapter__figure {
  margin: clamp(24px, 3vw, 34px) 0 0;
}

.page-about .chapter__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .chapter__figure .figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

/* ---------- 赛季时间轴 ---------- */

.page-about .season-track {
  list-style: none;
  margin: clamp(22px, 2.6vw, 32px) 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .season-track::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--rule);
}

.page-about .season-track__node {
  position: relative;
  padding-bottom: clamp(20px, 2.4vw, 28px);
}

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

.page-about .season-track__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 2px solid var(--jade);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .season-track__node:hover::before,
.page-about .season-track__node:focus-within::before {
  background: var(--track);
  border-color: var(--track);
}

.page-about .season-track__title {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .season-track__meta {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--track);
}

.page-about .season-track__desc {
  max-width: 56ch;
  margin: 7px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 数字区 ---------- */

.page-about .stat-grid {
  list-style: none;
  margin: clamp(20px, 2.4vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-rule-soft);
  border: 1px solid var(--ab-rule-soft);
}

@media (min-width: 760px) {
  .page-about .stat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .stat-grid__cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 30px) clamp(14px, 1.8vw, 22px);
  background: var(--paper);
}

.page-about .stat-grid__num {
  font-size: clamp(26px, 4.6vw, 54px);
  font-weight: 700;
  line-height: 1;
  color: var(--jade-deep);
}

.page-about .stat-grid__cell:first-child .stat-grid__num {
  color: var(--track);
}

.page-about .stat-grid__label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 结尾入口 ---------- */

.page-about .about-next {
  margin-top: clamp(30px, 4.4vw, 60px);
  padding: clamp(34px, 5vw, 62px) 0;
  background: linear-gradient(140deg, var(--night) 0%, var(--glow) 100%);
  color: var(--paper);
}

.page-about .about-next__title {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .about-next__text {
  max-width: 48ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(242, 233, 220, .76);
}

.page-about .about-next__links {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
}

.page-about .about-next__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 3px;
  font-size: 15px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 233, 220, .35);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

@media (max-width: 599px) {
  .page-about .about-cover__title {
    font-size: clamp(30px, 9.6vw, 44px);
  }

  .page-about .about-cover__facts .about-fact {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .chapter__head {
    flex-direction: column;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .season-track__node::before,
  .page-about .about-next__link {
    transition: none;
  }
}