.page-about {
  --about-rule: 1px solid rgba(16, 20, 24, 0.14);
  --about-rule-soft: 1px solid rgba(16, 20, 24, 0.08);
  --about-dark-rule: 1px solid rgba(216, 222, 214, 0.16);
  --about-dim: rgba(244, 246, 242, 0.66);
  background: var(--chalk-050);
  color: var(--ink-900);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 5vw, 48px) 0 clamp(32px, 6vw, 68px);
  color: var(--chalk-050);
  background:
    repeating-linear-gradient(118deg, rgba(30, 122, 76, 0.17) 0 20px, rgba(7, 12, 22, 0) 20px 52px),
    linear-gradient(178deg, var(--night-900) 0%, var(--night-800) 68%, var(--pitch-700) 100%);
  border-bottom: var(--hair-strong);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--pitch-600), var(--ref-yellow) 62%, var(--neon-orange));
}

.page-about .about-kicker {
  margin: clamp(16px, 3vw, 26px) 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--ref-yellow);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(26px, 5.6vw, 48px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.page-about .about-hero__sub {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(16px, 2.6vw, 22px);
  line-height: 1.65;
  color: var(--pitch-300);
  max-width: 24em;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-dim);
  max-width: 640px;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(216, 222, 214, 0.18);
  border: var(--about-dark-rule);
}

.page-about .about-stats li {
  background: var(--night-900);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats__num {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--neon-orange);
}

.page-about .about-stats__label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--about-dim);
}

/* ---------- 长文主体 ---------- */
.page-about .about-longform {
  padding: clamp(36px, 6vw, 84px) 0 clamp(28px, 5vw, 56px);
  background: var(--chalk-050);
}

.page-about .about-longform__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 32px);
}

/* 左侧赛季刻度轴 */
.page-about .season-axis {
  border-top: 2px solid var(--pitch-600);
  padding-top: 10px;
}

.page-about .season-axis__kicker {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--pitch-600);
}

.page-about .season-axis__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .season-axis__link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 12px;
  border: var(--about-rule);
  text-decoration: none;
  color: var(--ink-900);
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .season-axis__no {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 15px;
  color: var(--pitch-600);
  font-variant-numeric: tabular-nums;
}

.page-about .season-axis__link:hover,
.page-about .season-axis__link:focus-visible {
  border-color: var(--pitch-600);
  color: var(--pitch-700);
}

.page-about .season-axis__link:hover .season-axis__no,
.page-about .season-axis__link:focus-visible .season-axis__no {
  color: var(--neon-orange-deep);
}

/* 正文流 */
.page-about .about-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(40px, 7vw, 88px);
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: 96px;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 12px;
  border-top: 2px solid var(--pitch-600);
  margin-bottom: 16px;
}

.page-about .about-section__no {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
  color: var(--pitch-600);
  font-variant-numeric: tabular-nums;
  flex: none;
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-about .about-copy p {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-900);
  max-width: 39em;
}

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

.page-about .about-quote {
  margin: 22px 0;
  padding: 4px 0 4px 16px;
  border-left: 3px solid var(--neon-orange);
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.6vw, 22px);
  line-height: 1.75;
  color: var(--pitch-700);
  max-width: 28em;
}

/* 图文错位分栏 */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-shot {
  margin: 0;
  border: var(--about-rule);
  background: var(--night-900);
  overflow: hidden;
}

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

.page-about .about-shot__cap {
  display: block;
  padding: 10px 12px;
  font-family: var(--font-serif);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--about-dim);
  background: var(--night-900);
}

/* 数据摘要格 */
.page-about .about-metrics {
  margin: 24px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: var(--about-rule);
  border-left: var(--about-rule);
}

.page-about .about-metrics__cell {
  padding: 16px 14px 18px;
  border-right: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .about-metrics__label {
  margin: 0 0 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: rgba(16, 20, 24, 0.62);
}

.page-about .about-metrics__num {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--neon-orange-deep);
}

/* ---------- 四步流程切换 ---------- */
.page-about .flow-switch {
  margin-top: 20px;
  position: relative;
}

.page-about .flow-switch input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .flow-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  border-bottom: var(--about-rule);
}

.page-about .flow-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 14px;
  border: var(--about-rule);
  border-bottom: 0;
  background: transparent;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 600;
  color: rgba(16, 20, 24, 0.66);
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .flow-tab:hover {
  color: var(--ink-900);
  border-color: var(--pitch-500);
}

.page-about #about-flow-1:checked ~ .flow-tabs .flow-tab:nth-child(1),
.page-about #about-flow-2:checked ~ .flow-tabs .flow-tab:nth-child(2),
.page-about #about-flow-3:checked ~ .flow-tabs .flow-tab:nth-child(3),
.page-about #about-flow-4:checked ~ .flow-tabs .flow-tab:nth-child(4) {
  background: var(--pitch-600);
  border-color: var(--pitch-600);
  color: var(--chalk-050);
}

.page-about #about-flow-1:focus-visible ~ .flow-tabs .flow-tab:nth-child(1),
.page-about #about-flow-2:focus-visible ~ .flow-tabs .flow-tab:nth-child(2),
.page-about #about-flow-3:focus-visible ~ .flow-tabs .flow-tab:nth-child(3),
.page-about #about-flow-4:focus-visible ~ .flow-tabs .flow-tab:nth-child(4) {
  outline: 2px solid var(--neon-orange-deep);
  outline-offset: 2px;
}

.page-about .flow-panels {
  border: var(--about-rule);
  border-top: 2px solid var(--pitch-600);
  padding: 18px 16px 20px;
  background: #ffffff;
}

.page-about .flow-panel {
  display: none;
}

.page-about #about-flow-1:checked ~ .flow-panels .flow-panel:nth-child(1),
.page-about #about-flow-2:checked ~ .flow-panels .flow-panel:nth-child(2),
.page-about #about-flow-3:checked ~ .flow-panels .flow-panel:nth-child(3),
.page-about #about-flow-4:checked ~ .flow-panels .flow-panel:nth-child(4) {
  display: block;
}

.page-about .flow-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--pitch-700);
}

.page-about .flow-panel__body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-900);
  max-width: 36em;
}

/* ---------- 通栏现场图 ---------- */
.page-about .about-interlude {
  background: var(--night-900);
  padding: clamp(40px, 7vw, 92px) 0;
}

.page-about .about-interlude__frame {
  position: relative;
  margin: 0;
  border: var(--about-dark-rule);
  overflow: hidden;
}

.page-about .about-interlude__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-about .about-interlude__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 12, 22, 0.05) 0%, rgba(7, 12, 22, 0.62) 100%);
  pointer-events: none;
}

.page-about .about-fixtures {
  position: relative;
  z-index: 1;
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 12px 14px;
  background: rgba(14, 21, 36, 0.86);
  border-top: 2px solid var(--ref-yellow);
}

.page-about .about-fixtures__label {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ref-yellow);
}

.page-about .about-fixtures__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.page-about .about-fixtures__list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-fixtures__time {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--neon-orange);
}

.page-about .about-interlude__caption {
  margin: 16px 0 0;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--about-dim);
}

/* ---------- 数据来源 ---------- */
.page-about .about-sources {
  padding: clamp(36px, 6vw, 80px) 0;
  background: var(--chalk-050);
}

.page-about .about-sources__aside {
  display: none;
}

.page-about .about-section--last .about-section__head {
  border-top-color: var(--neon-orange-deep);
}

.page-about .about-section--last .about-section__no {
  color: var(--neon-orange-deep);
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  padding: clamp(36px, 6vw, 82px) 0;
  background:
    repeating-linear-gradient(118deg, rgba(30, 122, 76, 0.14) 0 20px, rgba(7, 12, 22, 0) 20px 52px),
    linear-gradient(180deg, var(--night-800), var(--night-900));
  color: var(--chalk-050);
  border-top: 3px solid var(--pitch-600);
}

.page-about .about-close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .about-close .about-kicker {
  margin-top: 0;
}

.page-about .about-close__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.page-about .about-close__lead {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-dim);
  max-width: 36em;
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-close__links {
  list-style: none;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: var(--about-dark-rule);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-close__links a {
  color: var(--pitch-300);
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 176, 122, 0.4);
  padding-bottom: 1px;
}

.page-about .about-close__links a:hover,
.page-about .about-close__links a:focus-visible {
  color: var(--ref-yellow);
  border-bottom-color: var(--ref-yellow);
}

.page-about .about-close__figure {
  margin: 0;
  border: var(--about-dark-rule);
  background: var(--night-900);
  overflow: hidden;
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-longform__grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .season-axis {
    position: sticky;
    top: 96px;
    border-top: 0;
    border-left: 2px solid var(--pitch-600);
    padding: 0 0 0 10px;
    margin-top: 12px;
  }

  .page-about .season-axis__kicker {
    margin-bottom: 14px;
    padding-left: 4px;
  }

  .page-about .season-axis__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-about .season-axis__link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -12px;
    padding: 10px 0 10px 12px;
    width: 100%;
    justify-content: flex-start;
  }

  .page-about .season-axis__link:hover,
  .page-about .season-axis__link:focus-visible {
    border-left-color: var(--neon-orange-deep);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-metrics__cell {
    padding: 18px 16px 20px;
  }

  .page-about .flow-tabs {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .flow-tab {
    border-bottom: var(--about-rule);
    padding: 12px 20px;
  }

  .page-about .flow-panels {
    padding: 26px 26px 28px;
  }

  .page-about .about-sources .about-longform__grid {
    grid-template-columns: 120px minmax(0, 1fr);
  }

  .page-about .about-sources__aside {
    display: block;
    padding-top: 14px;
  }

  .page-about .about-sources__mark {
    font-family: var(--font-num);
    font-weight: 800;
    font-size: clamp(56px, 7vw, 96px);
    line-height: 0.9;
    letter-spacing: -0.03em;
    color: rgba(30, 122, 76, 0.22);
  }

  .page-about .about-close__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-close__figure {
    align-self: end;
  }

  .page-about .about-interlude .about-fixtures {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    margin-top: 0;
    border-top: 2px solid var(--ref-yellow);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-axis__link,
  .page-about .flow-tab {
    transition: none;
  }
}
<<<END>>>