.page-about {
  --about-hairline: rgba(255, 255, 255, .14);
  --about-hairline-strong: rgba(255, 255, 255, .3);
  --about-dash: rgba(255, 255, 255, .34);
  --about-pad: clamp(52px, 8vw, 104px);
  --about-lift: -4px;
  display: block;
  overflow-x: hidden;
}

.page-about p {
  margin: 0;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--data-cyan);
}

.page-about .breadcrumb a {
  color: var(--data-cyan);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--star-gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(44px, 7vw, 88px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(760px 460px at 84% 8%, rgba(244, 197, 66, .13), transparent 64%),
    radial-gradient(620px 420px at 4% 92%, rgba(47, 163, 107, .1), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  align-items: end;
}

.page-about .about-hero__copy {
  display: grid;
  gap: 18px;
  max-width: 40rem;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--star-gold);
}

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

.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-hairline);
}

.page-about .about-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 9;
  object-fit: cover;
  opacity: .52;
  filter: saturate(.72) contrast(1.06);
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 12, 30, .04) 0%, rgba(7, 12, 30, .78) 100%);
  pointer-events: none;
}

.page-about .about-hero__media figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--data-cyan);
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: var(--about-pad) 0;
}

.page-about .about-sec__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-sec__head {
  display: grid;
  gap: 12px;
  max-width: 46rem;
  margin-bottom: clamp(24px, 3.6vw, 44px);
}

.page-about .about-sec__num {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--star-gold);
}

.page-about .about-sec__num::after {
  content: "";
  display: block;
  width: clamp(36px, 8vw, 64px);
  height: 1px;
  background: linear-gradient(90deg, var(--star-gold), rgba(244, 197, 66, 0));
}

.page-about .about-sec__lede {
  color: var(--body-blue);
  font-size: 16px;
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-sec__body {
  display: grid;
  gap: 1.05em;
  max-width: 38em;
}

.page-about .about-sec__body p {
  color: var(--body-blue);
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-sec__body--tight {
  margin-top: 26px;
}

/* ---------- 时间纵轴 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 0;
  border-left: 2px dashed var(--about-dash);
}

.page-about .timeline__node {
  position: relative;
  padding-bottom: 18px;
}

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

.page-about .timeline__dot {
  position: absolute;
  left: -25px;
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--star-gold);
  box-shadow: 0 0 0 4px rgba(244, 197, 66, .14), 0 0 16px rgba(244, 197, 66, .55);
}

.page-about .timeline__card {
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--about-hairline);
  transition: border-color .18s var(--ease), transform .18s var(--ease), background .18s var(--ease);
}

.page-about .timeline__card:hover {
  transform: translateY(var(--about-lift));
  border-color: rgba(244, 197, 66, .48);
  background: rgba(255, 255, 255, .06);
}

.page-about .timeline__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.page-about .timeline__sum::-webkit-details-marker {
  display: none;
}

.page-about .timeline__sum::marker {
  content: "";
}

.page-about .timeline__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1;
  color: var(--star-gold);
}

.page-about .timeline__card[open] .timeline__sum::after {
  content: "\2013";
}

.page-about .timeline__stage {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--star-gold);
}

.page-about .timeline__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--line-white);
}

.page-about .timeline__panel {
  padding: 0 16px 16px;
}

.page-about .timeline__panel p {
  color: var(--body-blue);
  font-size: 15px;
  line-height: 1.85;
  max-width: 36em;
}

/* ---------- 球衣错位卡 ---------- */
.page-about .about-slip {
  margin: clamp(28px, 5vw, 52px) 0 0;
}

.page-about .about-slip__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-hairline);
}

.page-about .about-slip__frame::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(244, 197, 66, .34);
  pointer-events: none;
  z-index: 1;
}

.page-about .about-slip__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(.9);
}

.page-about .about-slip figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--data-cyan);
}

/* ---------- 编辑部分工条 ---------- */
.page-about .desk {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .desk__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, .035);
  border-left: 3px solid var(--about-hairline-strong);
  transition: background .18s var(--ease), transform .18s var(--ease);
}

.page-about .desk__item:hover {
  background: rgba(255, 255, 255, .07);
  transform: translateY(var(--about-lift));
}

.page-about .desk__item--a { border-left-color: var(--pitch-green); }
.page-about .desk__item--b { border-left-color: var(--star-gold); }
.page-about .desk__item--c { border-left-color: var(--hot-orange); }

.page-about .desk__count {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--line-white);
}

.page-about .desk__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--line-white);
}

.page-about .desk__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--data-cyan);
}

/* ---------- 资料索引 ---------- */
.page-about .about-index {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

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

.page-about .about-index__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-hairline);
}

.page-about .about-index__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .about-index__media figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--data-cyan);
}

.page-about .about-index__copy {
  display: grid;
  gap: 1.05em;
}

.page-about .about-index__copy p {
  color: var(--body-blue);
  font-size: 16px;
  line-height: 1.85;
  max-width: 38em;
}

.page-about .eras {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .era {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid var(--about-hairline);
  min-width: 108px;
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .era:hover {
  border-color: rgba(47, 163, 107, .6);
  background: rgba(47, 163, 107, .08);
}

.page-about .era__k {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--pitch-green);
}

.page-about .era__v {
  font-size: 13px;
  color: var(--body-blue);
}

/* ---------- 城市星图 ---------- */
.page-about .citymap {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .citymap__cap {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--data-cyan);
  margin-bottom: 14px;
}

.page-about .citymap__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 8px;
}

.page-about .citymap__list li {
  transition: transform .18s var(--ease);
}

.page-about .citymap__list li:nth-child(3n) {
  transform: translateY(7px);
}

.page-about .citymap__list li:nth-child(4n + 1) {
  transform: translateY(-6px);
}

.page-about .citymap__list a {
  display: block;
  padding: 9px 6px;
  text-align: center;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--body-blue);
  text-decoration: none;
  border: 1px solid var(--about-hairline);
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .citymap__list a:hover,
.page-about .citymap__list a:focus-visible {
  color: var(--ink-navy);
  background: var(--star-gold);
  border-color: var(--star-gold);
}

/* ---------- 更新节奏 ---------- */
.page-about .cadence {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hairline);
  max-width: 44rem;
}

.page-about .cadence__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-hairline);
}

.page-about .cadence__time {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--star-gold);
}

.page-about .cadence__what {
  font-size: 15px;
  line-height: 1.75;
  color: var(--body-blue);
}

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

/* ---------- 合作 ---------- */
.page-about .coop {
  display: grid;
  gap: 14px;
}

.page-about .coop__item {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px;
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--about-hairline);
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .coop__item:hover {
  transform: translateY(var(--about-lift));
  border-color: rgba(244, 197, 66, .45);
  background: rgba(255, 255, 255, .065);
}

.page-about .coop__item .tag {
  justify-self: start;
}

.page-about .coop__item p {
  color: var(--body-blue);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .coop__item--wide {
  border-left: 3px solid var(--hot-orange);
}

.page-about .about-coop-cta {
  margin-top: clamp(28px, 4vw, 46px);
  padding-top: 22px;
  border-top: 1px solid var(--about-hairline);
  display: grid;
  gap: 4px;
}

.page-about .about-coop-cta p {
  color: var(--body-blue);
  font-size: 16px;
  line-height: 1.8;
  max-width: 36em;
}

/* ---------- 收尾 ---------- */
.page-about .about-sec--last {
  padding-bottom: clamp(64px, 10vw, 128px);
}

.page-about .about-sec--last .about-sec__body p {
  color: var(--line-white);
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.7;
  letter-spacing: -.01em;
  font-weight: 500;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .desk {
    flex-direction: row;
    align-items: stretch;
  }

  .page-about .desk__item--a { flex: 5 1 0; }
  .page-about .desk__item--b { flex: 5 1 0; }
  .page-about .desk__item--c { flex: 4 1 0; }

  .page-about .cadence__row {
    grid-template-columns: minmax(180px, 220px) 1fr;
    align-items: baseline;
    gap: 20px;
  }

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

  .page-about .coop__item--wide {
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    align-items: start;
    gap: 8px 26px;
  }

  .page-about .coop__item--wide .tag {
    grid-column: 1;
  }

  .page-about .coop__item--wide .h-sub,
  .page-about .coop__item--wide p {
    grid-column: 2;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-hero__copy {
    padding-bottom: clamp(12px, 3vw, 40px);
  }

  .page-about .about-sec__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-sec__head {
    margin-bottom: 0;
  }

  .page-about .about-index {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-index__media {
    margin-top: 44px;
  }

  .page-about .about-slip {
    width: 66%;
    margin-left: auto;
    margin-top: clamp(-96px, -6vw, -40px);
    position: relative;
    z-index: 2;
    transform: translateX(14px);
  }

  /* 时间轴：中线对称，节点左右交错 */
  .page-about .timeline {
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline__node {
    width: calc(50% - 44px);
    padding-bottom: 34px;
  }

  .page-about .timeline__node:nth-child(odd) {
    margin-right: auto;
  }

  .page-about .timeline__node:nth-child(even) {
    margin-left: auto;
  }

  .page-about .timeline__node:nth-child(odd) .timeline__dot {
    left: auto;
    right: -49px;
  }

  .page-about .timeline__node:nth-child(even) .timeline__dot {
    left: -49px;
    right: auto;
  }

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

@media (min-width: 1100px) {
  .page-about .about-index {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-index__media {
    margin-top: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__card,
  .page-about .desk__item,
  .page-about .coop__item,
  .page-about .citymap__list li,
  .page-about .about-slip {
    transition: none;
    transform: none;
  }
}
</style>