.page-about {
  --about-r: 22px;
  --about-panel: var(--board);
  --about-glow: rgba(43, 227, 210, .18);
  padding-block: clamp(26px, 4.6vw, 64px) clamp(56px, 9vw, 132px);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
  margin-bottom: clamp(22px, 3.6vw, 46px);
}

.page-about .breadcrumb__link {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--cyan-soft);
  text-decoration: underline;
}

.page-about .breadcrumb__sep {
  color: var(--line);
}

.page-about .breadcrumb__item {
  color: var(--muted);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  max-width: 900px;
}

.page-about .about-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__eyebrow::before {
  content: "";
  width: 30px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  flex: none;
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 2.4vw, 28px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.4vw, 92px);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.6vw, 18.5px);
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 数字墙 ---------- */

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(10px, 1.4vw, 18px);
  margin-top: clamp(36px, 6vw, 76px);
}

.page-about .about-stats__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--r-md);
  min-width: 0;
}

.page-about .about-stats__cell:nth-child(even) {
  border-top-color: var(--orange);
}

.page-about .about-stats__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 6.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--cyan);
}

.page-about .about-stats__value--hot {
  color: var(--orange);
}

.page-about .about-stats__label {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-stats__note {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-chapter {
  margin-top: clamp(64px, 9vw, 132px);
  scroll-margin-top: 96px;
}

.page-about .about-chapter__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 780px;
  margin-bottom: clamp(24px, 3.4vw, 42px);
}

.page-about .about-chapter__band {
  width: 72px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange) 0 44%, var(--cyan) 44% 100%);
}

.page-about .about-chapter__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 34px;
  border-radius: 10px;
  background: var(--board-2);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4.6vw, 50px);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--ink);
}

.page-about .about-chapter__lead {
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-chapter__foot {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--line);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 70ch;
}

.page-about .about-copy {
  display: grid;
  gap: 14px;
  max-width: 72ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-copy p {
  margin: 0;
}

.page-about .about-copy--solo {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 210, .35);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 覆盖专题 ---------- */

.page-about .about-topics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .about-topics__card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  min-width: 0;
}

.page-about .about-topics__card::after {
  content: "";
  position: absolute;
  right: 20px;
  bottom: 18px;
  width: 26px;
  height: 3px;
  border-radius: 2px;
  background: var(--line);
}

.page-about .about-topics__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-topics__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-topics__text {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

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

.page-about .about-crew__card {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r-md);
  min-width: 0;
}

.page-about .about-crew__card--hot {
  border-left-color: var(--orange);
}

.page-about .about-crew__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-crew__card--hot .about-crew__count {
  color: var(--orange);
}

.page-about .about-crew__role {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  border-radius: var(--about-r);
  overflow: hidden;
  background: var(--about-panel);
  border: 1px solid var(--line);
}

.page-about .about-figure .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure .media-frame__caption {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-figure--data {
  max-width: 720px;
}

/* ---------- 战报流程 ---------- */

.page-about .about-flow {
  display: grid;
  gap: 12px;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--r-md);
  min-width: 0;
}

.page-about .about-flow__time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--orange-soft);
}

.page-about .about-flow__title {
  margin: 0 0 6px;
  font-size: 17.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 数据 ---------- */

.page-about .about-data {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-data__panel {
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--board-2);
  border: 1px solid var(--line);
  border-radius: var(--about-r);
  min-width: 0;
}

.page-about .about-data__panel-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-rhythm {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-rhythm__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rhythm__row:last-child {
  border-bottom: 0;
}

.page-about .about-rhythm__row dt {
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-rhythm__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14.5px;
  color: var(--ink);
  text-align: right;
}

.page-about .about-rhythm__row dd .numeric {
  color: var(--orange);
  font-size: 17px;
  font-weight: 700;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-left: 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  min-width: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--arena);
  border: 2px solid var(--cyan);
  transition: background .22s ease, box-shadow .22s ease, transform .22s ease;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px var(--about-glow);
  transform: scale(1.08);
}

.page-about .about-timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.8vw, 28px);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 合作 ---------- */

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

.page-about .about-deal .accordion__item {
  background: var(--about-panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-deal .accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px clamp(16px, 2.2vw, 24px);
  background: none;
  border: 0;
  text-align: left;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  transition: color .2s ease, background-color .2s ease;
}

.page-about .about-deal .accordion__trigger::after {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .24s ease;
}

.page-about .about-deal .accordion__trigger[aria-expanded="false"]::after {
  transform: rotate(-45deg);
}

.page-about .about-deal .accordion__trigger:hover,
.page-about .about-deal .accordion__trigger:focus-visible {
  background: rgba(43, 227, 210, .06);
  color: var(--cyan-soft);
}

.page-about .about-deal__panel {
  padding: 0 clamp(16px, 2.2vw, 24px) 20px;
  display: grid;
  gap: 10px;
}

.page-about .about-deal__panel p {
  margin: 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-deal__ask {
  padding: 12px 14px;
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(255, 106, 31, .07);
  color: var(--ink-soft) !important;
}

.page-about .about-deal__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .about-flow__step {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-about .about-data {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
  }

  .page-about .about-timeline {
    padding-left: 44px;
  }

  .page-about .about-timeline::before {
    left: 8px;
  }

  .page-about .about-timeline__item::before {
    left: -43px;
  }
}

@media (min-width: 1020px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-stats__cell:nth-child(1) {
    margin-top: 0;
  }

  .page-about .about-stats__cell:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-stats__cell:nth-child(3) {
    margin-top: 10px;
  }

  .page-about .about-stats__cell:nth-child(4) {
    margin-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-deal .accordion__trigger,
  .page-about .about-deal .accordion__trigger::after {
    transition: none;
  }
}