.page-about {
  --about-reading: 68ch;
  --about-label-col: 150px;
}

/* ---------- 首屏 ---------- */
.page-about .about-lead__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-lead__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 9vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--kg-seed);
}

.page-about .about-lead__lede {
  margin: 20px 0 0;
  max-width: 52ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--kg-seed);
}

.page-about .about-lead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

.page-about .about-lead__figure .figure__frame {
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

.page-about .about-lead__figure img,
.page-about .about-terms__figure img,
.page-about .about-sports__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 我们在做什么 ---------- */
.page-about .about-brief__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-brief__label {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--kg-moss);
}

.page-about .about-brief__body h2,
.page-about .about-head h2,
.page-about .about-terms__body h2,
.page-about .about-partners h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--kg-seed);
}

.page-about .about-brief__body p {
  margin: 18px 0 0;
  max-width: var(--about-reading);
  font-size: 17px;
  line-height: 1.75;
  color: var(--kg-seed);
}

.page-about .about-brief__points {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-brief__point {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--kg-porcelain);
}

.page-about .about-brief__point .metric {
  flex: 0 0 auto;
  font-size: clamp(28px, 6vw, 44px);
  color: var(--kg-lime-deep);
}

.page-about .about-brief__point-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--kg-moss);
}

/* ---------- 团队 ---------- */
.page-about .about-head__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--kg-seed);
}

.page-about .about-roles {
  margin-top: 44px;
  display: grid;
  gap: 30px;
}

.page-about .about-role {
  padding-top: 18px;
  border-top: 3px solid var(--kg-lime);
}

.page-about .about-role:focus-visible {
  outline: 2px solid var(--kg-gold);
  outline-offset: 6px;
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--kg-seed);
}

.page-about .about-role__duty {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--kg-seed);
}

.page-about .about-role__more {
  max-height: 12em;
  opacity: 1;
  overflow: hidden;
}

.page-about .about-role__more p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--kg-moss);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  gap: 34px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 36px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 24px;
  bottom: -34px;
  width: 1px;
  background: var(--kg-porcelain);
}

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 6px;
  width: 19px;
  height: 19px;
  border-radius: 50%;
  background: var(--kg-gold);
}

.page-about .about-timeline__ver {
  margin: 0;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--kg-lime-deep);
}

.page-about .about-timeline__card h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.35;
  color: var(--kg-seed);
}

.page-about .about-timeline__card p {
  margin: 12px 0 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--kg-seed);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .about-timeline__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--kg-moss);
}

.page-about .about-timeline__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--kg-lime);
  transform: rotate(45deg);
}

/* ---------- 运动与联赛 ---------- */
.page-about .about-sports {
  color: var(--kg-white);
}

.page-about .about-sports .eyebrow {
  color: var(--kg-gold);
}

.page-about .about-sports h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 6vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--kg-white);
}

.page-about .about-sports__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-sports__figure {
  margin: 38px 0 0;
}

.page-about .about-sports__figure .figure__frame {
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 42px), calc(100% - 42px) 100%, 0 100%);
}

.page-about .sport-grid {
  list-style: none;
  margin: 42px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px 14px;
}

.page-about .sport-item {
  display: grid;
  gap: 8px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 180ms ease;
}

.page-about .sport-item:hover,
.page-about .sport-item:focus-within {
  color: var(--kg-white);
}

.page-about .sport-item--key {
  color: var(--kg-gold);
}

.page-about .sport-item--key:hover,
.page-about .sport-item--key:focus-within {
  color: var(--kg-white);
}

.page-about .sport-item__icon {
  display: inline-flex;
  color: inherit;
}

.page-about .sport-item__name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.page-about .sport-item__depth {
  font-size: 12px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.48);
  transition: color 180ms ease;
}

.page-about .sport-item:hover .sport-item__depth,
.page-about .sport-item:focus-within .sport-item__depth {
  color: rgba(255, 255, 255, 0.9);
}

/* ---------- 术语与命名 ---------- */
.page-about .about-terms__grid {
  display: grid;
  gap: 32px;
}

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

.page-about .about-terms__body p {
  margin: 18px 0 0;
  max-width: var(--about-reading);
  font-size: 17px;
  line-height: 1.75;
  color: var(--kg-seed);
}

.page-about .about-terms__stat {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--kg-porcelain);
}

.page-about .about-terms__stat .metric {
  flex: 0 0 auto;
  font-size: clamp(30px, 7vw, 48px);
  color: var(--kg-lime-deep);
}

.page-about .about-terms__stat-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--kg-moss);
}

/* ---------- 合作伙伴 ---------- */
.page-about .about-partners__grid {
  margin-top: 38px;
  display: grid;
  gap: 28px;
}

.page-about .about-partner {
  padding-top: 16px;
  border-top: 1px solid var(--kg-lime-deep);
}

.page-about .about-partner h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--kg-seed);
}

.page-about .about-partner p {
  margin: 10px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--kg-seed);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -130px;
  top: -130px;
  width: 430px;
  height: 430px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(87, 194, 46, 0.32), transparent 68%);
  pointer-events: none;
}

.page-about .about-cta .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 30px;
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 6vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--kg-white);
}

.page-about .about-cta__copy p {
  margin: 18px 0 0;
  max-width: 50ch;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: flex-start;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 760px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 40px;
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-lead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: end;
  }

  .page-about .about-brief__grid {
    grid-template-columns: var(--about-label-col) minmax(0, 1fr);
    gap: 0 72px;
  }

  .page-about .about-brief__label {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    padding-top: 6px;
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 48px;
  }

  .page-about .about-timeline__item {
    padding-left: 0;
    padding-top: 40px;
  }

  .page-about .about-timeline__item::before {
    left: 22px;
    right: -48px;
    top: 9px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .about-timeline__node {
    top: 0;
  }

  .page-about .about-terms__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 72px;
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 64px;
  }
}

@media (min-width: 960px) {
  .page-about .about-roles {
    grid-template-columns: 1.25fr 0.95fr 1fr 1.15fr;
    gap: 0 36px;
  }

  .page-about .about-role__more {
    max-height: 0;
    opacity: 0;
    transition: max-height 240ms ease, opacity 240ms ease;
  }

  .page-about .about-role:hover .about-role__more,
  .page-about .about-role:focus-within .about-role__more {
    max-height: 12em;
    opacity: 1;
  }
}

@media (min-width: 1024px) {
  .page-about .sport-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 34px 18px;
  }
}