.page-about {
  --about-rail-w: 232px;
  --about-gap: clamp(20px, 3vw, 48px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .yq-breadcrumb {
  margin-top: clamp(10px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-masthead {
  padding: clamp(26px, 5vw, 62px) 0 clamp(24px, 4vw, 48px);
  border-bottom: 1px solid var(--yq-line);
}

.page-about .about-masthead__title {
  margin: 12px 0 18px;
  font-size: clamp(29px, 5vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.022em;
  font-weight: 800;
  color: var(--yq-ink);
  max-width: 20ch;
}

.page-about .about-masthead__lede {
  margin: 0;
  font-size: clamp(16px, 1.5vw, 18.5px);
  line-height: 1.82;
  color: var(--yq-ink-soft);
  max-width: 36em;
}

/* ---------- 指标带 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--yq-paper-line);
  border: 1px solid var(--yq-paper-line);
  border-radius: var(--yq-radius);
  overflow: hidden;
}

.page-about .about-metrics li {
  background: var(--yq-paper);
  padding: clamp(14px, 2vw, 22px) clamp(14px, 2vw, 22px) clamp(16px, 2.2vw, 24px);
}

.page-about .about-metrics__num {
  font-family: var(--yq-font-mono);
  font-variant-numeric: tabular-nums lining-nums;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--yq-green);
}

.page-about .about-metrics__unit {
  margin-left: 5px;
  font-size: 13px;
  color: var(--yq-muted);
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--yq-ink-soft);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(30px, 5vw, 64px);
}

/* ---------- 左侧索引 ---------- */
.page-about .about-rail__head {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--yq-muted);
}

.page-about .about-rail__list {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-rail__list a {
  display: block;
  padding: 7px 12px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--yq-ink-soft);
  text-decoration: none;
  border-radius: var(--yq-pill);
  border: 1px solid var(--yq-paper-line);
  background: rgba(255, 255, 255, 0.4);
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--yq-green);
  border-color: var(--yq-line);
  background: rgba(36, 70, 60, 0.1);
}

.page-about .about-rail__note {
  padding-top: 16px;
  border-top: 1px solid var(--yq-paper-line);
}

.page-about .about-rail__note-num {
  display: block;
  font-family: var(--yq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 40px;
  line-height: 0.95;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--yq-window);
  margin-bottom: 8px;
}

.page-about .about-rail__note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--yq-muted);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: clamp(32px, 4.6vw, 58px) 0;
  border-top: 1px solid var(--yq-paper-line);
  scroll-margin-top: 110px;
}

.page-about .about-body > .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  max-width: 44em;
}

.page-about .about-chapter__title {
  margin: 8px 0 12px;
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--yq-ink);
  max-width: 18ch;
}

.page-about .about-chapter__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.82;
  color: var(--yq-ink-soft);
  max-width: 38em;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 34px) 0 0;
}

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

.page-about .about-figure--inset {
  max-width: 620px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--yq-paper-line);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px 26px;
  padding: clamp(18px, 2.4vw, 28px) 0;
  border-bottom: 1px solid var(--yq-paper-line);
}

.page-about .about-timeline__year {
  font-family: var(--yq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 0.92;
  font-weight: 700;
  letter-spacing: -0.045em;
  color: var(--yq-green);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: clamp(16.5px, 1.7vw, 20px);
  line-height: 1.4;
  font-weight: 700;
  color: var(--yq-ink);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--yq-ink-soft);
  max-width: 40em;
}

/* ---------- 数据来源表格 ---------- */
.page-about .about-table-wrap {
  margin-top: clamp(24px, 3vw, 36px);
  overflow-x: auto;
  border: 1px solid var(--yq-paper-line);
  border-radius: var(--yq-radius);
  background: var(--yq-paper);
  box-shadow: var(--yq-shadow);
}

.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-about .about-table__caption {
  padding: 14px 16px 0;
  text-align: left;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--yq-muted);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
  border-bottom: 1px solid var(--yq-paper-line);
}

.page-about .about-table thead th {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--yq-muted);
  background: rgba(36, 70, 60, 0.07);
  white-space: nowrap;
}

.page-about .about-table tbody th {
  font-weight: 700;
  color: var(--yq-green);
  white-space: nowrap;
}

.page-about .about-table tbody td {
  color: var(--yq-ink-soft);
}

.page-about .about-table tbody tr:last-child th,
.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 双栏内容块 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-split__main p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--yq-ink-soft);
  max-width: 38em;
}

.page-about .about-facts {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  display: flex;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--yq-paper-line);
  font-size: 15px;
  line-height: 1.72;
  color: var(--yq-ink-soft);
}

.page-about .about-facts li::before {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--yq-line);
}

.page-about .about-pull {
  align-self: start;
  padding: clamp(18px, 2.4vw, 26px);
  border-left: 3px solid var(--yq-window);
  border-radius: 0 var(--yq-radius) var(--yq-radius) 0;
  background: rgba(232, 163, 61, 0.08);
}

.page-about .about-pull p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.76;
  font-weight: 600;
  color: var(--yq-ink);
}

/* ---------- 青训合作块 ---------- */
.page-about .about-collab {
  margin-top: 22px;
  padding: 18px 20px;
  border: 1px solid var(--yq-paper-line);
  border-radius: var(--yq-radius);
  background: rgba(36, 70, 60, 0.06);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.page-about .about-collab:hover,
.page-about .about-collab:focus-within {
  transform: translateY(-2px);
  border-color: var(--yq-line);
  box-shadow: var(--yq-shadow-lift);
}

.page-about .about-collab__head {
  margin: 0 0 8px;
  font-size: 15.5px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--yq-green);
}

.page-about .about-collab__count {
  font-family: var(--yq-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--yq-window);
  margin-right: 6px;
}

.page-about .about-collab__base {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--yq-ink-soft);
}

.page-about .about-youth-link {
  margin-top: 22px;
}

/* ---------- 并行视图面板 ---------- */
.page-about .about-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 20px);
  margin-top: clamp(22px, 3vw, 36px);
}

.page-about .about-panel {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--yq-paper-line);
  border-top-width: 3px;
  border-radius: var(--yq-radius);
  background: var(--yq-paper);
  box-shadow: var(--yq-shadow);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.page-about .about-panel:hover {
  transform: translateY(-2px);
  box-shadow: var(--yq-shadow-lift);
}

.page-about .about-panel--pitch { border-top-color: var(--yq-epl); }
.page-about .about-panel--window { border-top-color: var(--yq-laliga); }
.page-about .about-panel--alert { border-top-color: var(--yq-ligue1); }

.page-about .about-panel h3 {
  margin: 0 0 10px;
  font-size: clamp(16.5px, 1.7vw, 19px);
  line-height: 1.42;
  font-weight: 700;
  color: var(--yq-ink);
}

.page-about .about-panel p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.8;
  color: var(--yq-ink-soft);
}

.page-about .about-panels__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--yq-ink-soft);
  max-width: 38em;
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  margin: clamp(22px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--yq-paper-line);
  border: 1px solid var(--yq-paper-line);
  border-radius: var(--yq-radius);
  overflow: hidden;
}

.page-about .about-milestones__item {
  background: var(--yq-paper);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .about-milestones__kicker {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  border-radius: var(--yq-pill);
  border: 1px solid var(--yq-line);
  color: var(--yq-green);
  background: rgba(36, 70, 60, 0.08);
}

.page-about .about-milestones__item h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.7vw, 18.5px);
  line-height: 1.44;
  font-weight: 700;
  color: var(--yq-ink);
}

.page-about .about-milestones__item p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.8;
  color: var(--yq-ink-soft);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 4vw, 52px);
  padding: clamp(26px, 3.6vw, 44px) clamp(20px, 3vw, 40px);
  border-radius: var(--yq-radius);
  background: linear-gradient(140deg, var(--yq-green) 0%, var(--yq-green-deep) 100%);
  border: 1px solid var(--yq-line);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--yq-paper);
}

.page-about .about-cta__text {
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--yq-on-green);
  max-width: 36em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline__item {
    grid-template-columns: 138px minmax(0, 1fr);
    align-items: start;
  }

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

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

@media (min-width: 920px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-rail__list {
    display: block;
  }

  .page-about .about-rail__list li + li {
    margin-top: 4px;
  }

  .page-about .about-rail__list a {
    border-radius: 0 6px 6px 0;
    border-color: transparent;
    background: transparent;
    padding: 8px 12px;
    border-left: 2px solid var(--yq-paper-line);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.3fr);
  }
}

@media (min-width: 1100px) {
  .page-about .about-milestones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-panel,
  .page-about .about-collab {
    transition: none;
  }
}
<<<END>>>