.page-about {
  --about-gutter: clamp(20px, 4vw, 48px);
}

/* ---------- 面包屑上下留白 ---------- */
.page-about .breadcrumbs {
  padding-block: 18px 8px;
}

/* ---------- 首屏刊头 ---------- */
.page-about .about-cover {
  position: relative;
  padding-block: clamp(24px, 4vw, 48px) clamp(36px, 6vw, 72px);
  overflow: hidden;
}

.page-about .about-cover__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-cover__note {
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: .28em;
  color: var(--mist);
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-cover__copy {
  display: grid;
  gap: 18px;
}

.page-about .about-cover__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 82px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--ivory);
  margin: 0;
  text-wrap: balance;
}

.page-about .about-cover__lead {
  max-width: 36em;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  margin: 0;
}

.page-about .about-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-cover__visual {
  margin: 0;
  position: relative;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--stand);
}

.page-about .about-cover__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-cover__visual .media__cap {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
  border-top: 1px solid var(--hairline);
}

.page-about .about-cover__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .stat {
  background: var(--night);
  padding: 18px 20px;
  display: grid;
  gap: 6px;
}

.page-about .stat__num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 40px);
  letter-spacing: -.02em;
  color: var(--neon);
  line-height: 1;
}

.page-about .stat__label {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
}

/* ---------- 我们做的是什么 ---------- */
.page-about .about-what__grid {
  align-items: start;
}

.page-about .about-what__body {
  display: grid;
  gap: 16px;
  max-width: 38em;
}

.page-about .about-what__body p {
  color: var(--mist);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-what__body .lead {
  color: var(--ivory);
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.7;
}

.page-about .about-what__side {
  display: grid;
  gap: 18px;
  padding-left: 18px;
  border-left: 1px solid var(--hairline);
}

.page-about .about-what__side .note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--silver);
  margin: 0;
}

/* ---------- 三件坚持（分段控件） ---------- */
.page-about .about-stands__tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-stands__tab {
  appearance: none;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--ivory);
  background: var(--stand);
  border: 1px solid var(--hairline);
  padding: 10px 22px;
  border-radius: 2px;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-stands__tab:hover,
.page-about .about-stands__tab:focus-visible {
  border-color: var(--neon-edge);
  color: var(--neon);
  outline: none;
}

.page-about .about-stands__tab[aria-selected="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--night);
}

.page-about .about-stands__panel {
  position: relative;
  background: var(--stand);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 34px);
  display: grid;
  gap: 14px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-stands__panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), transparent 70%);
}

.page-about .about-stands__title {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ivory);
  margin: 0;
}

.page-about .about-stands__panel p {
  color: var(--mist);
  line-height: 1.8;
  margin: 0;
  max-width: 40em;
}

.page-about .about-stands__check {
  font-size: 13px;
  color: var(--neon) !important;
  border-top: 1px solid var(--hairline);
  padding-top: 12px;
  letter-spacing: .02em;
}

/* ---------- 迭代脉络（垂直时间线） ---------- */
.page-about .about-timeline__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 44px);
  align-items: start;
}

.page-about .about-timeline__visual {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--stand);
}

.page-about .about-timeline__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-about .about-timeline__visual .media__cap {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--mist);
  border-top: 1px solid var(--hairline);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--silver) 10%, var(--silver) 90%, transparent);
  opacity: .55;
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 18px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--night);
  border: 1px solid var(--neon);
  box-shadow: 0 0 0 3px rgba(6, 35, 28, .9);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--signal);
  border-color: var(--signal);
}

.page-about .about-timeline__node {
  background: var(--stand);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 12px 16px;
  transition: border-color .18s var(--ease);
}

.page-about .about-timeline__node[open] {
  border-color: var(--neon-edge);
}

.page-about .about-timeline__node summary {
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  list-style: none;
  outline: none;
}

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

.page-about .about-timeline__ver {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon);
}

.page-about .about-timeline__name {
  font-weight: 700;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--ivory);
  letter-spacing: .01em;
}

.page-about .about-timeline__node .accordion__panel p {
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
  margin: 10px 0 2px;
  padding-top: 10px;
  border-top: 1px solid var(--hairline);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  align-items: start;
}

.page-about .about-team__cells {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team__cell {
  background: var(--pitch);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-team__role {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .18em;
  color: var(--neon);
  margin: 0 0 8px;
  text-transform: uppercase;
}

.page-about .about-team__duty {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ivory);
}

.page-about .about-team__visual {
  margin: 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--stand);
}

.page-about .about-team__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__visual .media__cap {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  color: var(--mist);
  border-top: 1px solid var(--hairline);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-eco__intro {
  display: grid;
  gap: 14px;
  max-width: 36em;
}

.page-about .about-eco__intro p {
  color: var(--ivory);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-eco__details {
  display: grid;
  gap: 10px;
}

.page-about .about-eco__item {
  background: rgba(4, 20, 15, .45);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 14px 18px;
  transition: border-color .18s var(--ease);
}

.page-about .about-eco__item[open] {
  border-color: var(--signal-edge);
}

.page-about .about-eco__item summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 15px;
  color: var(--ivory);
  outline: none;
}

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

.page-about .about-eco__item .accordion__panel p {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--hairline);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 一个赛季之后 ---------- */
.page-about .about-season__grid {
  align-items: start;
}

.page-about .about-season__body {
  display: grid;
  gap: 14px;
  max-width: 38em;
  color: var(--ink-on-light);
}

.page-about .about-season__body p {
  margin: 0;
  line-height: 1.85;
  color: var(--ink-on-light);
}

.page-about .about-season__body .lead {
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.75;
}

.page-about .about-season__aside {
  display: grid;
  gap: 18px;
  padding-left: 18px;
  border-left: 1px solid rgba(18, 38, 31, .22);
}

.page-about .about-season__aside .note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(18, 38, 31, .72);
}

.page-about .about-season__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 桌面编排 ---------- */
@media (min-width: 640px) {
  .page-about .about-cover__stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (min-width: 960px) {
  .page-about .about-cover__grid {
    grid-template-columns: 32px 7fr 4fr;
    gap: 36px;
  }

  .page-about .about-cover__note {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    align-self: start;
    justify-self: start;
    padding-block: 6px;
    max-height: 340px;
  }

  .page-about .about-cover__copy {
    grid-column: 2;
  }

  .page-about .about-cover__visual {
    grid-column: 3;
  }

  .page-about .grid--7-4 {
    display: grid;
    grid-template-columns: 7fr 4fr;
    gap: 40px;
  }

  .page-about .about-timeline__layout {
    grid-template-columns: 4fr 7fr;
    gap: 44px;
  }

  .page-about .about-timeline__visual {
    position: sticky;
    top: 24px;
  }

  .page-about .about-eco__grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stands__tab,
  .page-about .about-timeline__node,
  .page-about .about-eco__item {
    transition: none;
  }
}