.page-about {
  --about-text: #2b3745;
  --about-hair: var(--silver);
  overflow-x: clip;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 5.2vw, 2.4rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--ink-blue);
  margin: 0.55rem 0 0.9rem;
}

.page-about .about-lede {
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--about-text);
  max-width: 70ch;
  margin: 0 0 1.75rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 1.5rem 0 2.25rem;
  background:
    radial-gradient(110% 80% at 92% -20%, rgba(95, 211, 178, 0.38), transparent 62%),
    linear-gradient(180deg, rgba(221, 237, 231, 0.85), rgba(247, 245, 239, 0) 78%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0 0 auto auto;
  width: 46%;
  height: 6px;
  background: linear-gradient(90deg, var(--grass), var(--orange));
  transform: skewX(-24deg);
  transform-origin: right top;
  opacity: 0.9;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 7vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--ink-blue);
  margin: 0.75rem 0 0.9rem;
}

.page-about .about-hero__lede {
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--about-text);
  max-width: 62ch;
  margin: 0 0 1.4rem;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-about .about-facts {
  padding: 1.1rem 1.15rem;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-facts__row:first-child {
  border-top: 0;
  padding-top: 0.15rem;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--grass-deep);
  white-space: nowrap;
}

.page-about .about-facts__label {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--about-text);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-timeline__rail ol {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.6rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-timeline__rail a {
  display: block;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--grass);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-blue);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-timeline__rail a:hover,
.page-about .about-timeline__rail a:focus-visible {
  border-left-color: var(--orange);
  color: var(--grass-deep);
}

.page-about .about-stage {
  padding: 0 0 1.75rem;
  border-bottom: 1px solid var(--about-hair);
  margin-bottom: 1.75rem;
  scroll-margin-top: 96px;
}

.page-about .about-stage:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-stage__year {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--orange);
  margin: 0 0 0.35rem;
}

.page-about .about-stage h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.15rem, 3.6vw, 1.5rem);
  line-height: 1.3;
  color: var(--ink-blue);
  margin: 0 0 0.6rem;
}

.page-about .about-stage p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--about-text);
  max-width: 66ch;
  margin: 0 0 0.8rem;
}

.page-about .about-stage__media {
  margin: 1.15rem 0 0;
}

/* ---------- 团队标签页 ---------- */
.page-about .team-tabs {
  position: relative;
}

.page-about .team-tabs__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-about .team-tabs__bar {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0 0 0.75rem;
  scrollbar-width: thin;
}

.page-about .team-tabs__label {
  cursor: pointer;
  flex: 0 0 auto;
  padding: 0.55rem 1rem;
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  background: var(--paper);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-blue);
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .team-tabs__label:hover {
  border-color: var(--grass);
  color: var(--grass-deep);
}

.page-about .team-tabs__input:focus-visible ~ .team-tabs__bar {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.page-about .team-tabs__input:nth-of-type(1):checked ~ .team-tabs__bar .team-tabs__label:nth-child(1),
.page-about .team-tabs__input:nth-of-type(2):checked ~ .team-tabs__bar .team-tabs__label:nth-child(2),
.page-about .team-tabs__input:nth-of-type(3):checked ~ .team-tabs__bar .team-tabs__label:nth-child(3),
.page-about .team-tabs__input:nth-of-type(4):checked ~ .team-tabs__bar .team-tabs__label:nth-child(4) {
  background: var(--grass);
  border-color: var(--grass-deep);
  color: #ffffff;
}

.page-about .team-tabs__panel {
  display: none;
  padding: 1.25rem 1.15rem;
  background: var(--paper);
  border: 1px solid var(--about-hair);
  border-left: 4px solid var(--orange);
  box-shadow: var(--shadow-plate);
}

.page-about .team-tabs__input:nth-of-type(1):checked ~ .team-tabs__panels .team-tabs__panel:nth-child(1),
.page-about .team-tabs__input:nth-of-type(2):checked ~ .team-tabs__panels .team-tabs__panel:nth-child(2),
.page-about .team-tabs__input:nth-of-type(3):checked ~ .team-tabs__panels .team-tabs__panel:nth-child(3),
.page-about .team-tabs__input:nth-of-type(4):checked ~ .team-tabs__panels .team-tabs__panel:nth-child(4) {
  display: block;
}

.page-about .team-tabs__role {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--ink-blue);
  margin: 0 0 0.55rem;
}

.page-about .team-tabs__panel p {
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--about-text);
  margin: 0 0 0.8rem;
}

.page-about .team-tabs__points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.page-about .team-tabs__points li {
  position: relative;
  padding-left: 1.05rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--about-text);
}

.page-about .team-tabs__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 2px;
  background: var(--grass);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-flow__item {
  padding: 1rem 1rem 1.1rem;
  background: var(--paper);
  border: 1px solid var(--about-hair);
  border-top: 3px solid var(--grass);
}

.page-about .about-flow__item:nth-child(4),
.page-about .about-flow__item:nth-child(5) {
  border-top-color: var(--orange);
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--grass-deep);
  margin-bottom: 0.35rem;
}

.page-about .about-flow__item:nth-child(4) .about-flow__num,
.page-about .about-flow__item:nth-child(5) .about-flow__num {
  color: var(--orange);
}

.page-about .about-flow__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  color: var(--ink-blue);
  margin: 0 0 0.4rem;
}

.page-about .about-flow__item p {
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--about-text);
  margin: 0;
}

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

/* ---------- 联赛栏目 ---------- */
.page-about .about-leagues {
  display: grid;
  gap: 0.9rem;
  margin-bottom: 1.5rem;
}

.page-about .about-league {
  padding: 1rem 1.05rem;
  background: var(--paper);
  border: 1px solid var(--about-hair);
  box-shadow: 5px 5px 0 -1px var(--mist);
}

.page-about .about-league__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--ink-blue);
  margin: 0 0 0.4rem;
}

.page-about .about-league p {
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--about-text);
  margin: 0 0 0.7rem;
}

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

/* ---------- 年费 ---------- */
.page-about .about-fee {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-about .about-fee__card {
  padding: 1.15rem 1.15rem 1.25rem;
}

.page-about .about-fee__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  color: var(--ink-blue);
  margin: 0 0 0.5rem;
}

.page-about .about-fee__card p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-fee__links {
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-fee__links a {
  color: var(--grass-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-fee__links a:hover {
  color: var(--orange);
}

/* ---------- 数据仪表板 ---------- */
.page-about .about-board {
  position: relative;
  padding: 1.4rem 1.15rem 1.5rem;
  background:
    linear-gradient(135deg, rgba(14, 143, 110, 0.4), transparent 55%),
    var(--ink-blue);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-board::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--grass-lite), var(--grass), var(--orange));
}

.page-about .about-metrics {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1.15rem;
}

.page-about .about-metric {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 0.9rem;
  border: 1px solid rgba(201, 210, 219, 0.32);
  background: rgba(247, 245, 239, 0.06);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.page-about .about-metric__label {
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(247, 245, 239, 0.82);
}

.page-about .about-board__note {
  font-size: 0.86rem;
  line-height: 1.85;
  color: rgba(247, 245, 239, 0.88);
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(201, 210, 219, 0.28);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-milestones__row {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-milestones__phase {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.95rem;
  color: var(--ink-blue);
}

.page-about .about-milestones__time {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--grass-deep);
}

.page-about .about-milestones__row p {
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--about-text);
  margin: 0;
}

.page-about .about-cta {
  padding: 1.25rem 1.15rem;
  background: var(--paper);
  border: 1px solid var(--about-hair);
  border-left: 4px solid var(--orange);
}

.page-about .about-cta__text {
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--about-text);
  margin: 0 0 1rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding-top: 2rem;
  }

  .page-about .about-facts {
    padding: 1.25rem 1.35rem;
  }

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

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

  .page-about .about-board {
    padding: 1.6rem 1.5rem 1.7rem;
  }

  .page-about .team-tabs__panel {
    padding: 1.5rem 1.4rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 2.5rem 0 3rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 3rem;
  }

  .page-about .about-timeline {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 3rem;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-timeline__rail ol {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-timeline__rail a {
    white-space: normal;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.7rem;
  }

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

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

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

  .page-about .about-milestones__row {
    grid-template-columns: 150px 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 1.25rem;
    padding: 1.1rem 0;
  }

  .page-about .about-stage {
    padding-bottom: 2.25rem;
    margin-bottom: 2.25rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-league {
    padding: 1.1rem 0.95rem;
  }

  .page-about .about-cta {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
    padding: 1.5rem 1.75rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__rail a,
  .page-about .team-tabs__label {
    transition: none;
  }
}