.page-about {
  --about-line: 1px;
  --about-gap: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(40px, 7vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 20px 0 clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(36px, 6vw, 72px);
  border-bottom: var(--about-line) solid var(--line);
}

.page-about .about-ghost {
  position: absolute;
  top: -0.14em;
  right: -0.04em;
  z-index: 0;
  font-size: clamp(160px, 33vw, 460px);
  line-height: 0.78;
  font-weight: 700;
  letter-spacing: -0.07em;
  color: transparent;
  -webkit-text-stroke: 1px #1E3A52;
  opacity: 0.6;
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-kicker {
  margin: 0;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-about .about-hero-title {
  margin: 14px 0 18px;
  max-width: 16ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 92px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-hero-lede {
  max-width: 46ch;
  color: var(--mist);
}

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

/* 赛季账目面板 */
.page-about .about-ledger {
  border: var(--about-line) solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--ink-700);
  padding: 22px 22px 18px;
}

.page-about .about-ledger-label {
  margin: 0 0 18px;
  color: var(--stone);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .about-ledger-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .about-ledger-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: var(--about-line) solid var(--line);
}

.page-about .about-ledger-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-ledger-num {
  flex: 0 0 auto;
  min-width: 3.2ch;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-ledger-num em {
  font-style: normal;
  color: var(--amber);
}

.page-about .about-ledger-txt {
  font-size: 15px;
  line-height: 1.5;
  color: var(--mist);
}

/* 首屏通栏图 */
.page-about .about-hero-media {
  margin: 0;
  border-bottom: var(--about-line) solid var(--line);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 900;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

/* ---------- 通用标题 ---------- */
.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-section-head {
  max-width: 720px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-section-lede {
  margin: 16px 0 0;
  color: var(--stone);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-top: clamp(48px, 7vw, 96px);
}

.page-about .about-origin-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-origin-body p {
  max-width: 68ch;
  color: var(--mist);
}

.page-about .about-origin-body p + p {
  margin-top: 16px;
}

.page-about .about-origin-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-section {
  padding-top: clamp(48px, 7vw, 96px);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 48px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 16%, var(--line) 86%, transparent 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 36px;
  padding-bottom: clamp(40px, 5vw, 64px);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px var(--ink-900);
  z-index: 1;
}

.page-about .tl-marker {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .tl-num {
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .tl-tag {
  padding: 3px 10px;
  border: var(--about-line) solid var(--line);
  background: var(--ink-700);
  color: var(--stone);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .tl-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .tl-body p {
  max-width: 62ch;
  color: var(--stone);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .tl-points {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .tl-points li {
  position: relative;
  padding-left: 18px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.6;
}

.page-about .tl-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-inline-media {
  margin: 24px 0 0;
  border: var(--about-line) solid var(--line);
  max-width: 520px;
}

.page-about .about-inline-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05);
}

.page-about .media-caption {
  display: block;
  padding: 10px 12px;
  border-top: var(--about-line) solid var(--line);
  color: var(--stone);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: clamp(48px, 7vw, 96px);
}

.page-about .about-team-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-team-body > p {
  margin-top: 16px;
  max-width: 64ch;
  color: var(--stone);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-roles {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--about-line) solid var(--line);
}

.page-about .role-card {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num name"
    "desc desc";
  align-items: baseline;
  gap: 4px 16px;
  padding: 18px 20px;
  background: var(--ink-900);
  transition: background 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  background: var(--ink-700);
  box-shadow: inset 2px 0 0 var(--cyan);
  outline: none;
}

.page-about .role-card:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .role-num {
  grid-area: num;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  min-width: 2.4ch;
}

.page-about .role-name {
  grid-area: name;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--mist);
}

.page-about .role-desc {
  grid-area: desc;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 260ms var(--ease), max-height 260ms var(--ease);
}

.page-about .role-card:hover .role-desc,
.page-about .role-card:focus-within .role-desc,
.page-about .role-card:focus-visible .role-desc {
  opacity: 1;
  max-height: 6em;
}

.page-about .about-team-media {
  margin: 0;
  border: var(--about-line) solid var(--line);
  align-self: start;
}

.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.08);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach {
  padding-top: clamp(48px, 7vw, 96px);
}

.page-about .about-reach-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: var(--about-line) solid var(--line);
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .reach-cell {
  background: var(--ink-900);
  padding: 22px 18px;
  display: grid;
  gap: 8px;
}

.page-about .reach-num {
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .reach-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--stone);
}

.page-about .about-reach-note {
  max-width: 720px;
  padding-left: 18px;
  border-left: 2px solid var(--clay);
}

.page-about .about-reach-note p {
  margin: 0;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-top: clamp(48px, 7vw, 96px);
}

.page-about .about-coop-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--about-line) solid var(--line);
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .coop-card {
  background: var(--ink-900);
  padding: 24px 20px 26px;
}

.page-about .coop-index {
  display: inline-block;
  margin-bottom: 14px;
  padding: 2px 8px;
  border: var(--about-line) solid var(--moss);
  color: var(--moss);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .coop-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--mist);
}

.page-about .coop-card p {
  margin: 0;
  color: var(--stone);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-partner-media {
  margin: 0;
  border: var(--about-line) solid var(--line);
}

.page-about .about-partner-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 900;
  object-fit: cover;
  filter: saturate(0.75) contrast(1.1);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-top: clamp(48px, 7vw, 96px);
}

.page-about .about-next-grid {
  display: grid;
  gap: var(--about-gap);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: var(--about-line) solid var(--line);
}

.page-about .about-next-body > p {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--stone);
  font-size: 16px;
  line-height: 1.75;
}

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

.page-about .about-next-aside {
  border-left: 2px solid var(--cyan);
  padding-left: 20px;
  align-self: start;
}

.page-about .about-aside-label {
  margin: 0 0 16px;
  color: var(--stone);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .about-next-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-reach-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
    column-gap: clamp(40px, 6vw, 80px);
  }

  .page-about .about-origin-grid {
    grid-template-columns: 260px minmax(0, 1fr);
    column-gap: clamp(40px, 6vw, 72px);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    column-gap: clamp(40px, 6vw, 72px);
    align-items: start;
  }

  .page-about .about-next-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.5fr);
    column-gap: clamp(40px, 6vw, 72px);
  }

  .page-about .about-timeline::before {
    left: 23px;
    top: 0;
    bottom: 64px;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 48px);
    padding-left: 56px;
    padding-bottom: clamp(48px, 5vw, 76px);
  }

  .page-about .tl-item::before {
    left: 18px;
    top: 10px;
  }

  .page-about .tl-marker {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 0;
  }

  .page-about .tl-num {
    font-size: 30px;
  }

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

  .page-about .about-inline-media {
    margin-top: 28px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero-title {
    max-width: 14ch;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .role-desc {
    transition: none;
  }
}