.page-about {
  --about-side: 96px;
  --about-paper-2: #EFE8D9;
  --about-paper-3: #E9E0CD;
  padding-block: clamp(18px, 3.6vw, 36px) clamp(44px, 7vw, 88px);
  background: var(--paper);
  color: var(--ink);
}

.page-about .wrap {
  min-width: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-soft);
  margin-block-end: clamp(18px, 3.4vw, 36px);
}
.page-about .crumbs a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
  padding-block-end: 2px;
  transition: color 140ms ease, border-color 140ms ease;
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--red);
  outline: none;
}
.page-about .crumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}
.page-about .crumbs__sep {
  color: var(--rule);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 34px);
  margin-block-end: clamp(26px, 4.6vw, 52px);
}

.page-about .about-hero__body {
  min-width: 0;
}

.page-about .about-hero .eyebrow {
  margin: 0;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(34px, 7vw, 78px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.022em;
  color: var(--ink);
}

.page-about .about-hero .lead {
  margin: clamp(16px, 2.8vw, 26px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  margin-block-start: clamp(20px, 3.4vw, 34px);
  padding-block-start: 14px;
  border-top: 2px solid var(--ink);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-inline-end: clamp(16px, 2.6vw, 32px);
  margin-inline-end: clamp(16px, 2.6vw, 32px);
  border-inline-end: 1px solid var(--hair);
}
.page-about .about-stat:last-child {
  padding-inline-end: 0;
  margin-inline-end: 0;
  border-inline-end: 0;
}
.page-about .about-stat__num {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}
.page-about .about-stat__unit {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.page-about .about-hero__fig {
  margin: 0;
  position: relative;
  border: 1px solid var(--ink);
  background: var(--paper-layer);
  box-shadow: 10px 10px 0 var(--red);
  overflow: hidden;
}
.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.04) sepia(0.08);
}

/* ---------- 章节跳转 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding-block: 10px;
  margin-block-end: clamp(18px, 3vw, 30px);
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--hair);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 6;
}

.page-about .about-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
}
.page-about .about-jump__link .u-mono {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--red);
}
.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--ink);
  background: var(--paper-layer);
  border-color: var(--ink);
  outline: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 1.4vw, 14px);
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: clamp(22px, 3.4vw, 42px) clamp(18px, 3vw, 34px);
  background: var(--paper);
  border-left: 3px solid var(--ink);
  box-shadow: 6px 6px 0 rgba(20, 22, 27, 0.06);
  scroll-margin-top: 84px;
}

.page-about .about-chapter:nth-child(even) {
  background: var(--about-paper-2);
  box-shadow: 6px 6px 0 rgba(20, 22, 27, 0.09);
}

.page-about .about-chapter__side {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 12px;
}

.page-about .about-chapter__idx {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .about-chapter__tag {
  font-size: 11px;
  letter-spacing: 0.1em;
}

.page-about .about-chapter__main {
  min-width: 0;
}

.page-about .about-chapter__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.012em;
  color: var(--ink);
}

.page-about .about-chapter .prose {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-chapter .prose p {
  margin: 0 0 1em;
}
.page-about .about-chapter .prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-chapter .prose a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid var(--blue);
}
.page-about .about-chapter .prose a:hover,
.page-about .about-chapter .prose a:focus-visible {
  color: var(--red);
  border-bottom-color: var(--red);
  outline: none;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0 0 0 14px;
  border-left: 1px solid var(--rule);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(18px, 2.6vw, 28px) clamp(18px, 2.6vw, 28px);
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--red);
  transform: rotate(45deg);
}
.page-about .about-timeline__item:nth-child(even) .about-timeline__dot {
  background: var(--blue);
}

.page-about .about-timeline__year {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 5px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 筛选按钮 ---------- */
.page-about .filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-block: clamp(20px, 3vw, 30px) clamp(14px, 2vw, 20px);
}

.page-about .filter-btn {
  appearance: none;
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  letter-spacing: 0.06em;
  padding: 7px 16px;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}
.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  background: var(--paper-layer);
  outline: none;
}
.page-about .filter-btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ---------- 俱乐部卡片 ---------- */
.page-about .club-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .club-cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--paper);
}
.page-about .club-cell .sticker {
  align-self: flex-start;
}
.page-about .club-cell__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}
.page-about .club-cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.page-about .club-cell[hidden],
.page-about .club-cell.is-hidden {
  display: none;
}

/* ---------- 赛后结论双色块 ---------- */
.page-about .metric-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin-block-start: clamp(22px, 3.4vw, 36px);
  background: var(--ink);
  border: 1px solid var(--ink);
}

.page-about .metric-card {
  min-width: 0;
  padding: clamp(20px, 3vw, 32px);
  color: var(--paper);
}
.page-about .metric-card--red {
  background: var(--red);
}
.page-about .metric-card--blue {
  background: var(--blue);
}
.page-about .metric-card__label {
  display: inline-block;
  margin-block-end: 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.8;
}
.page-about .metric-card__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
}
.page-about .metric-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  opacity: 0.94;
}
.page-about .metric-card .metric-card__meta {
  margin-block-start: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  opacity: 0.76;
}

/* ---------- 团队分栏 ---------- */
.page-about .about-chapter__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  margin-block-start: clamp(16px, 2.8vw, 26px);
}

.page-about .about-chapter__fig {
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--paper-layer);
  box-shadow: 8px 8px 0 var(--blue);
  overflow: hidden;
}
.page-about .about-chapter__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.05) sepia(0.1);
}

.page-about .team-line {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2px;
  margin-block-start: clamp(20px, 3vw, 32px);
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .team-line__cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(14px, 2.2vw, 22px);
  background: var(--paper);
  min-width: 0;
}
.page-about .team-line__num {
  font-size: clamp(28px, 3.8vw, 44px);
  font-weight: 700;
  line-height: 1;
}
.page-about .team-line__cell:nth-child(1) .team-line__num {
  color: var(--red);
}
.page-about .team-line__cell:nth-child(2) .team-line__num {
  color: var(--ink);
}
.page-about .team-line__cell:nth-child(3) .team-line__num {
  color: var(--blue);
}
.page-about .team-line__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

/* ---------- 合作机构数字 ---------- */
.page-about .partner-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin-block-start: clamp(22px, 3.4vw, 34px);
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .partner-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--paper);
  min-width: 0;
}
.page-about .partner-cell__num {
  font-size: clamp(28px, 4.2vw, 50px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
}
.page-about .partner-cell:nth-child(1) .partner-cell__num {
  color: var(--red);
}
.page-about .partner-cell:nth-child(4) .partner-cell__num {
  color: var(--blue);
}
.page-about .partner-cell__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

/* ---------- 合作路线 ---------- */
.page-about .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .route-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--paper);
  border-top: 4px solid var(--ink);
}
.page-about .route-item--red {
  border-top-color: var(--red);
}
.page-about .route-item--blue {
  border-top-color: var(--blue);
}
.page-about .route-item--ink {
  border-top-color: var(--ink);
}
.page-about .route-item__idx {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}
.page-about .route-item__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.page-about .route-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-about .route-item .route-item__meta {
  margin-block-start: 2px;
  padding-block-start: 10px;
  border-top: 1px dashed var(--rule);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
}
.page-about .route-item .btn {
  align-self: flex-start;
  margin-block-start: auto;
}

.page-about .route-figure {
  margin-block: clamp(24px, 3.6vw, 38px) 0;
  padding-block: clamp(10px, 2vw, 18px);
  border-block: 1px solid var(--hair);
}
.page-about .route-figure svg {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
}

.page-about .route-wide {
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  border: 1px solid var(--ink);
  box-shadow: 8px 8px 0 rgba(20, 22, 27, 0.08);
  overflow: hidden;
}
.page-about .route-wide img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.06);
}

/* ---------- 进入显现 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 420ms ease-out, transform 420ms ease-out;
  }
  .page-about [data-reveal].is-in {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 窄屏兜底 ---------- */
.page-about img,
.page-about svg {
  max-width: 100%;
  height: auto;
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-about .club-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 740px) {
  .page-about .about-chapter__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
  }
  .page-about .metric-pair {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .partner-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .route-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 0 44px;
    align-items: end;
  }
  .page-about .about-chapter {
    grid-template-columns: var(--about-side) minmax(0, 1fr);
    gap: 0 36px;
    padding-inline-end: clamp(28px, 4vw, 56px);
  }
  .page-about .about-chapter__side {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-block-start: 4px;
  }
  .page-about .club-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .route-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__fig {
    margin-block-end: 8px;
  }
}
<<<END>>>