.page-about {
  --about-rail-w: 212px;
  --about-node: #C6FF3D;
  --about-line: rgba(244, 247, 245, 0.10);
  padding-bottom: 72px;
}

.page-about .about-wrap {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ---------- 页面开场 ---------- */

.page-about .about-intro {
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--glass-line);
}

.page-about .about-intro__kicker {
  margin: 0 0 14px;
  color: var(--neon);
}

.page-about .about-intro__title {
  margin: 0 0 18px;
  max-width: 20ch;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--jersey);
}

.page-about .about-intro__lede {
  margin: 0;
  max-width: 68ch;
  color: var(--stand);
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 14px;
  background: var(--panel);
}

.page-about .about-facts__item .num-md {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 34px;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "zero" 1;
}

.page-about .about-facts__item small {
  font-size: 16px;
  font-weight: 600;
  margin-left: 2px;
  color: var(--neon-soft);
}

.page-about .about-facts__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--stand);
}

/* ---------- 时间线骨架 ---------- */

.page-about .timeline-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 36px;
}

.page-about .tl-rail__title {
  margin: 0 0 12px;
  color: var(--stand);
}

.page-about .tl-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 4px;
}

.page-about .tl-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  background: var(--panel);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .tl-rail__link:hover,
.page-about .tl-rail__link.is-current {
  border-color: var(--glass-line-strong);
  color: var(--jersey);
}

.page-about .tl-rail__dot {
  width: 9px;
  height: 9px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--neon);
  background: transparent;
}

.page-about .tl-rail__link.is-current .tl-rail__dot {
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.16);
}

.page-about .tl-rail__meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .tl-rail__year {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .tl-rail__name {
  font-size: 13px;
  color: var(--stand);
}

/* ---------- 各个阶段 ---------- */

.page-about .phase {
  padding: 40px 0;
  border-top: 1px solid var(--glass-line);
}

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

.page-about .phase__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .phase__idx {
  flex: none;
  color: var(--neon);
}

.page-about .phase__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--jersey);
}

.page-about .phase__lead {
  margin: 0 0 8px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--stand);
}

.page-about .phase__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.page-about .phase__text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--jersey);
}

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

.page-about .phase__text a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  transition: border-color var(--dur) var(--ease);
}

.page-about .phase__text a:hover {
  border-bottom-color: var(--neon);
}

.page-about .phase__media {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-about .phase__media--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .phase__media--box img {
  aspect-ratio: 4 / 3;
}

.page-about .phase__media .media__cap {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--stand);
  border-top: 1px solid var(--glass-line);
}

/* ---------- 全宽比分横幅 ---------- */

.page-about .about-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  margin: 0 0 12px;
  padding: 20px 22px;
  background: linear-gradient(115deg, var(--pitch) 0%, var(--panel) 72%);
  border: 1px solid var(--pitch-line);
  border-left: 4px solid var(--neon);
  border-radius: var(--radius);
}

.page-about .about-banner .score-banner__round {
  color: var(--amber);
}

.page-about .about-banner .score-banner__score {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 42px;
  line-height: 0.9;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "zero" 1;
}

.page-about .about-banner .score-banner__teams {
  flex: 1 1 200px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--jersey);
}

/* ---------- 维度图表 ---------- */

.page-about .dim-figure {
  margin: 22px 0 0;
  padding: 18px 10px 10px;
  background: var(--panel);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  overflow-x: auto;
}

.page-about .dim-chart {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

.page-about .dim-chart__grid line {
  stroke: var(--glass-line);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.page-about .dim-chart__axis {
  stroke: var(--glass-line-strong);
  stroke-width: 1;
}

.page-about .dim-chart__label {
  font-family: var(--font-body);
  font-size: 21px;
  fill: var(--jersey);
}

.page-about .dim-chart__tick {
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: 0.06em;
  fill: var(--stand);
}

.page-about .dim-chart__bar {
  transition: filter var(--dur) var(--ease);
}

.page-about .dim-chart__bar--a { fill: var(--neon); opacity: 0.95; }
.page-about .dim-chart__bar--b { fill: var(--neon); opacity: 0.58; }
.page-about .dim-chart__bar--c { fill: var(--ref-red); opacity: 0.85; }
.page-about .dim-chart__bar--d { fill: var(--jersey); opacity: 0.46; }
.page-about .dim-chart__bar--e { fill: var(--amber); opacity: 0.8; }
.page-about .dim-chart__bar--f { fill: var(--neon-soft); opacity: 0.85; }

.page-about .dim-chart__row:hover .dim-chart__bar {
  filter: brightness(1.28);
}

/* ---------- 维度说明卡 ---------- */

.page-about .dim-notes {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .dim-notes__item {
  padding: 15px 16px;
  background: var(--panel);
  border-left: 3px solid var(--pitch-line);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: border-left-color var(--dur) var(--ease);
}

.page-about .dim-notes__item:hover {
  border-left-color: var(--neon);
}

.page-about .dim-notes__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.page-about .dim-notes__name {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.25;
  color: var(--jersey);
}

.page-about .dim-notes__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--stand);
}

/* ---------- 团队面板 ---------- */

.page-about .team-panel {
  margin-top: 26px;
  padding: 22px 20px;
  border-radius: var(--radius);
}

.page-about .team-panel__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 20px;
  color: var(--jersey);
}

.page-about .team-shifts {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .team-shifts li {
  padding-top: 13px;
  border-top: 2px solid var(--pitch-line);
}

.page-about .team-shifts li:nth-child(2) {
  border-top-color: var(--neon);
}

.page-about .team-shifts li:nth-child(3) {
  border-top-color: var(--amber);
}

.page-about .team-shifts__slot {
  color: var(--jersey);
}

.page-about .team-shifts p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--stand);
}

/* ---------- 档案库数据 ---------- */

.page-about .archive-stats {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
}

.page-about .archive-stats li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: var(--panel);
  border: 1px solid var(--glass-line);
  border-top: 2px solid var(--neon);
  border-radius: var(--radius);
}

.page-about .archive-stats__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 36px;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "zero" 1;
}

.page-about .archive-stats__num small {
  font-size: 17px;
  font-weight: 600;
  margin-left: 2px;
  color: var(--neon-soft);
}

.page-about .archive-stats__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--stand);
}

/* ---------- 问答展开区 ---------- */

.page-about .about-ask {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--glass-line);
}

.page-about .about-ask .sec-head {
  margin-bottom: 20px;
}

.page-about .about-ask .sec-head__idx {
  color: var(--neon);
}

.page-about .about-ask .sec-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.2;
  color: var(--jersey);
}

.page-about .about-ask .expand-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-ask .expand__inner {
  font-size: 15px;
  line-height: 1.75;
  color: var(--stand);
}

.page-about .about-ask .expand__inner a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
}

.page-about .about-ask .expand__inner p {
  margin: 0;
}

/* ---------- 结尾引导 ---------- */

.page-about .about-cta {
  margin-top: 40px;
  padding: 30px 24px;
  background: linear-gradient(140deg, var(--pitch) 0%, var(--panel) 78%);
  border: 1px solid var(--pitch-line);
  border-radius: var(--radius);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  max-width: 26ch;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 23px;
  line-height: 1.25;
  color: var(--jersey);
}

.page-about .about-cta__text {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stand);
}

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

/* ---------- 平板及以上 ---------- */

@media (min-width: 720px) {
  .page-about .about-intro__title {
    font-size: 38px;
  }

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

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

  .page-about .about-facts__item .num-md {
    font-size: 40px;
  }

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

  .page-about .phase__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
  }

  .page-about .phase__body--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .dim-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }

  .page-about .team-shifts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .team-panel {
    padding: 26px 24px;
  }

  .page-about .about-cta {
    padding: 38px 34px;
  }

  .page-about .about-cta__title {
    font-size: 28px;
  }
}

/* ---------- 桌面：左侧固定时间线 ---------- */

@media (min-width: 960px) {
  .page-about .timeline-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 52px;
    padding-top: 48px;
  }

  .page-about .tl-rail {
    position: sticky;
    top: 32px;
    align-self: start;
  }

  .page-about .tl-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--glass-line);
  }

  .page-about .tl-rail__link {
    display: grid;
    grid-template-columns: 10px minmax(0, 1fr);
    column-gap: 12px;
    align-items: start;
    white-space: normal;
    padding: 13px 12px 13px 16px;
    margin-left: -1px;
    background: none;
    border: 0;
    border-left: 1px solid transparent;
    border-radius: 0;
  }

  .page-about .tl-rail__link:hover,
  .page-about .tl-rail__link.is-current {
    border-left-color: var(--neon);
  }

  .page-about .tl-rail__dot {
    margin-top: 4px;
  }

  .page-about .phase {
    padding: 48px 0;
  }

  .page-about .phase__title {
    font-size: 34px;
  }

  .page-about .about-ask .sec-head__title {
    font-size: 28px;
  }
}

/* ---------- 降级与减动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .page-about .dim-chart__bar,
  .page-about .tl-rail__link,
  .page-about .dim-notes__item {
    transition: none;
  }
}
<<<END>>>