.page-about {
  --about-axis: rgba(63, 163, 114, .45);
  --about-axis-soft: rgba(63, 163, 114, .1);
}

.page-about .about-crumb {
  padding-top: clamp(84px, 11vw, 118px);
}

.page-about .about-crumb__sep {
  margin: 0 8px;
  color: var(--index);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(24px, 4vw, 44px) clamp(40px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 90%;
  background:
    radial-gradient(58% 66% at 20% 0%, rgba(63, 163, 114, .2), transparent 70%),
    radial-gradient(48% 56% at 90% 12%, rgba(245, 200, 107, .1), transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 32px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.06;
}

.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 46ch;
}

.page-about .about-hero__act {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  margin-top: 28px;
}

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

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

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 500;
  color: var(--text);
  letter-spacing: -.01em;
}

.page-about .about-stat__key {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--index);
}

/* ---------- 年份时间线 ---------- */

.page-about .about-years__head {
  display: grid;
  gap: 28px;
}

.page-about .about-years__head .lede {
  margin-top: 16px;
}

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

.page-about .about-years__body {
  display: grid;
  gap: 32px;
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about .about-years__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-years__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--grass) 0%, rgba(63, 163, 114, .18) 78%, transparent 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 34px;
  padding-block: 12px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 40px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--grass);
  box-sizing: border-box;
}

.page-about .tl-card {
  position: relative;
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: rgba(28, 43, 69, .5);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .tl-card:hover,
.page-about .tl-card:focus-within {
  border-color: rgba(245, 200, 107, .5);
  background: rgba(28, 43, 69, .72);
}

.page-about .tl-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .tl-year {
  font-size: clamp(40px, 8vw, 60px);
  line-height: .9;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -.03em;
}

.page-about .tl-card .h3 {
  margin: 0 0 10px;
}

.page-about .tl-card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

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

.page-about .tl-extra {
  font-size: 14px !important;
  color: var(--index) !important;
  border-left: 2px solid var(--about-axis);
  padding-left: 12px;
  margin-top: 14px !important;
}

.page-about .about-years__index ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-years__index a {
  display: inline-block;
  padding: 7px 14px;
  font-size: 13px;
  color: var(--index);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-years__index a:hover,
.page-about .about-years__index a:focus-visible {
  color: var(--grass-lite);
  border-color: var(--grass-lite);
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-team__card {
  display: flex;
  flex-direction: column;
}

.page-about .about-team__idx {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--grass);
  margin-bottom: 14px;
}

.page-about .about-team__card .h3 {
  margin: 0 0 10px;
}

.page-about .about-team__card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-team__meta {
  margin-top: auto !important;
  margin-bottom: 0 !important;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px !important;
  color: var(--index) !important;
  letter-spacing: .04em;
}

/* ---------- 栏目脉络 ---------- */

.page-about .about-grow__grid {
  display: grid;
  gap: 32px;
}

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

.page-about .about-grow__copy .lede {
  margin-top: 16px;
}

.page-about .about-grow__steps {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  counter-reset: grow;
}

.page-about .about-grow__steps > li {
  position: relative;
  counter-increment: grow;
  padding: 20px 0 20px 50px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-grow__steps > li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-grow__steps > li::before {
  content: counter(grow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 24px;
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--grass);
  letter-spacing: .06em;
}

.page-about .about-grow__steps .h3 {
  margin: 0 0 8px;
}

.page-about .about-grow__steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 赛季记录 ---------- */

.page-about .about-archive__grid {
  display: grid;
  gap: 26px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-archive__note p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
}

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

.page-about .about-archive__fields .eyebrow {
  margin-bottom: 16px;
}

.page-about .about-archive__fields .field {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-archive__fields .field:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-archive__fields .field-key {
  flex: 0 0 56px;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--grass-lite);
  letter-spacing: .04em;
}

.page-about .about-archive__fields .field-val {
  flex: 1 1 auto;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

/* ---------- 三条承诺 ---------- */

.page-about .about-promise__list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-promise__list > li {
  padding: 26px 22px 24px;
  border-radius: var(--r-card);
  background: rgba(16, 27, 46, .82);
  box-shadow: inset 0 2px 0 0 var(--grass);
}

.page-about .about-promise__num {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--index);
  margin-bottom: 14px;
}

.page-about .about-promise__list .h3 {
  margin: 0 0 10px;
}

.page-about .about-promise__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-promise__foot {
  margin: clamp(26px, 3.5vw, 38px) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--index);
  max-width: 60ch;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px 24px;
  }

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-years__head {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-grow__grid {
    grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 920px) {
  .page-about .about-years__body {
    grid-template-columns: minmax(0, 1fr) 156px;
    gap: 48px;
  }

  .page-about .about-years__index {
    position: sticky;
    top: 124px;
    align-self: start;
  }

  .page-about .about-years__index ul {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-years__index a {
    display: block;
    text-align: center;
  }

  .page-about .tl-item:nth-child(odd) .tl-card {
    margin-right: 10%;
  }

  .page-about .tl-item:nth-child(even) .tl-card {
    margin-left: 10%;
  }
}

@media (min-width: 900px) {
  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-promise__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .tl-extra {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0 !important;
    padding-top: 0;
    padding-bottom: 0;
    transition: max-height var(--dur) var(--ease),
                opacity var(--dur) var(--ease),
                margin-top var(--dur) var(--ease),
                padding-top var(--dur) var(--ease),
                padding-bottom var(--dur) var(--ease);
  }

  .page-about .tl-card:hover .tl-extra,
  .page-about .tl-card:focus-within .tl-extra {
    max-height: 260px;
    opacity: 1;
    margin-top: 14px !important;
    padding-top: 6px;
    padding-bottom: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-extra {
    max-height: none !important;
    opacity: 1 !important;
    margin-top: 14px !important;
    padding-top: 6px !important;
    padding-bottom: 6px !important;
    transition: none;
  }

  .page-about .tl-card,
  .page-about .about-years__index a {
    transition: none;
  }
}