.page-about {
  --about-measure: 640px;
  --about-ease: cubic-bezier(.22, .61, .36, 1);
  padding-bottom: var(--s-6);
}

.page-about .breadcrumb {
  margin: var(--s-4) 0 var(--s-5);
}

/* ---------- 开场 ---------- */
.page-about .about-head {
  padding-bottom: var(--s-6);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-head__kicker {
  margin: 0 0 var(--s-3);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-head__title {
  margin: 0 0 var(--s-4);
  max-width: 24ch;
  font-family: var(--font-head);
  font-size: clamp(28px, 6.4vw, 44px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--text);
  text-shadow: 0 0 24px rgba(139, 92, 255, .3);
}

.page-about .about-head__lead {
  margin: 0 0 var(--s-5);
  max-width: var(--about-measure);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.95;
  color: var(--text-dim);
}

.page-about .about-head__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-head__facts li {
  min-width: 0;
  padding: var(--s-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, rgba(20, 42, 38, .9), rgba(12, 30, 27, .45));
}

.page-about .about-head__num {
  display: block;
  font-size: 26px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--gold);
}

.page-about .about-head__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section {
  padding: var(--s-6) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-section:last-of-type {
  border-bottom: 0;
}

.page-about .about-section > .section-head {
  margin-bottom: var(--s-5);
}

.page-about .about-prose {
  max-width: var(--about-measure);
}

.page-about .about-prose p {
  margin: 0 0 var(--s-4);
  font-size: 16px;
  line-height: 1.95;
  color: var(--text-dim);
}

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

.page-about .about-prose strong {
  color: var(--gold);
  font-weight: 700;
}

.page-about .mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0 0 var(--s-5);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(232, 244, 241, .04) 0 1px,
    transparent 1px 4px
  );
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 7 / 3;
}

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 团队标签组 ---------- */
.page-about .team-tabs {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .team-tabs__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  opacity: 0;
  pointer-events: none;
}

.page-about .team-tabs__bar {
  display: flex;
  gap: var(--s-2);
  padding: var(--s-3);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(20, 42, 38, .55);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .team-tabs__label {
  flex: 0 0 auto;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
  transition: color .2s var(--about-ease), border-color .2s var(--about-ease),
              background-color .2s var(--about-ease);
}

.page-about .team-tabs__label:hover {
  color: var(--text);
  border-color: var(--cyan);
}

.page-about .team-tabs__radio:nth-of-type(1):checked ~ .team-tabs__bar .team-tabs__label:nth-child(1),
.page-about .team-tabs__radio:nth-of-type(2):checked ~ .team-tabs__bar .team-tabs__label:nth-child(2),
.page-about .team-tabs__radio:nth-of-type(3):checked ~ .team-tabs__bar .team-tabs__label:nth-child(3) {
  color: var(--ink-900);
  background-color: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.page-about .team-tabs__panels {
  padding: var(--s-4);
}

.page-about .team-tabs__panel {
  display: none;
}

.page-about .team-tabs__radio:nth-of-type(1):checked ~ .team-tabs__panels > .team-tabs__panel:nth-child(1),
.page-about .team-tabs__radio:nth-of-type(2):checked ~ .team-tabs__panels > .team-tabs__panel:nth-child(2),
.page-about .team-tabs__radio:nth-of-type(3):checked ~ .team-tabs__panels > .team-tabs__panel:nth-child(3) {
  display: block;
}

.page-about .team-tabs__panel p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-dim);
}

/* ---------- 检索规则：两栏 + 主题簇 ---------- */
.page-about .rules-layout {
  display: grid;
  gap: var(--s-5);
  align-items: start;
}

.page-about .rules-layout .about-figure {
  margin-bottom: 0;
}

.page-about .clusters {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
  margin-top: var(--s-5);
}

.page-about .cluster {
  min-width: 0;
  padding: var(--s-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
  transition: transform .18s var(--about-ease), border-color .18s var(--about-ease),
              box-shadow .18s var(--about-ease);
}

.page-about .cluster:hover,
.page-about .cluster:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.page-about .cluster__idx {
  display: block;
  margin-bottom: var(--s-2);
  font-size: 13px;
  color: var(--violet);
}

.page-about .cluster__title {
  margin: 0 0 var(--s-2);
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--text);
}

.page-about .cluster__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet), var(--cyan) 55%, var(--gold));
  opacity: .55;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 var(--s-5);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 7px;
  box-sizing: border-box;
  width: 11px;
  height: 11px;
  border: 2px solid var(--violet);
  border-radius: 50%;
  background: var(--ink-900);
  transition: border-color .2s var(--about-ease), background-color .2s var(--about-ease),
              box-shadow .2s var(--about-ease);
}

.page-about .tl__item:hover::before {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(33, 230, 210, .16);
}

.page-about .tl__year {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--text);
}

.page-about .tl__text {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 分类清单 ---------- */
.page-about .catalog-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  align-items: start;
}

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

.page-about .catalog-notes {
  min-width: 0;
  padding: var(--s-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(139, 92, 255, .12), rgba(12, 30, 27, .9) 60%);
}

.page-about .catalog-notes__title {
  margin: 0 0 var(--s-3);
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
}

.page-about .catalog-notes__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .catalog-notes__hint {
  margin: var(--s-3) 0 var(--s-4);
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin: var(--s-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .filter-tags li {
  padding: 6px 12px;
  border: 1px dashed var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  transition: color .18s var(--about-ease), border-color .18s var(--about-ease);
}

.page-about .filter-tags li:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 下一步入口 ---------- */
.page-about .next-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
}

.page-about .next-link {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  padding: var(--s-4);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
  text-decoration: none;
  transition: transform .18s var(--about-ease), border-color .18s var(--about-ease),
              box-shadow .18s var(--about-ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-cyan);
}

.page-about .next-link__tag {
  align-self: flex-start;
}

.page-about .next-link__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--text);
}

.page-about .next-link__desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

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

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

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

@media (min-width: 1000px) {
  .page-about .about-head {
    padding-top: var(--s-3);
  }

  .page-about .rules-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-about .catalog-layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .85fr);
  }

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

  .page-about .tl {
    padding-left: 34px;
  }

  .page-about .tl__item::before {
    left: -31px;
  }
}

@media (max-width: 420px) {
  .page-about .head__title,
  .page-about .about-head__title {
    font-size: 26px;
  }

  .page-about .team-tabs__panels {
    padding: var(--s-3);
  }
}
<<<END>>>