.page-about {
  --ab-rail: 228px;
  position: relative;
  padding-bottom: 48px;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding-top: 16px;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-about .ab-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  padding: 6px 16px 6px 9px;
  border: 1px solid var(--lh-line);
  background: var(--lh-glass);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--lh-muted);
  clip-path: polygon(12px 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .ab-hero__season {
  font-family: var(--lh-font-mono);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1;
}

.page-about .ab-hero__title {
  margin: 0 0 18px;
  font-family: var(--lh-font-head);
  font-weight: 800;
  font-size: clamp(29px, 6.6vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--lh-paper);
}

.page-about .ab-hero__text {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--lh-muted);
}

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

/* ---------- 图片容器 ---------- */
.page-about .ab-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--lh-line);
  background:
    radial-gradient(120% 100% at 18% 0%, rgba(232, 114, 28, 0.18), transparent 62%),
    var(--lh-rock-deep);
}

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

.page-about .ab-media--hero {
  aspect-ratio: 3 / 2;
}

.page-about .ab-media--wide {
  aspect-ratio: 8 / 3;
  margin: 20px 0 26px;
}

.page-about .ab-media--team {
  aspect-ratio: 3 / 2;
  margin: 22px 0 8px;
}

/* ---------- 数据条 ---------- */
.page-about .ab-stats {
  margin-top: 30px;
}

.page-about .ab-stats__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--lh-line);
  background: var(--lh-line);
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: rgba(17, 16, 22, 0.94);
  backdrop-filter: blur(12px);
}

.page-about .ab-stat__num {
  font-family: var(--lh-font-mono);
  font-size: clamp(26px, 5.4vw, 38px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
}

.page-about .ab-stat__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--lh-dim);
}

/* ---------- 主体双栏 ---------- */
.page-about .ab-body-section {
  padding-top: 34px;
}

.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

/* ---------- 章节索引 ---------- */
.page-about .ab-index {
  position: static;
}

.page-about .ab-index__inner {
  padding: 12px;
  border: 1px solid var(--lh-line);
  background: var(--lh-glass);
  backdrop-filter: blur(10px);
}

.page-about .ab-index__hint {
  margin: 0 0 10px;
  font-family: var(--lh-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--lh-dim);
}

.page-about .ab-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-about .ab-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid transparent;
  color: var(--lh-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  color: var(--lh-paper);
  border-color: rgba(232, 114, 28, 0.5);
  background: rgba(232, 114, 28, 0.1);
  outline: none;
}

.page-about .ab-index__no {
  font-family: var(--lh-font-mono);
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
}

.page-about .ab-index__label {
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* ---------- 章节 ---------- */
.page-about .ab-flow {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .ab-chapter {
  position: relative;
  padding: 30px 0 10px;
  border-top: 1px solid var(--lh-line-soft);
  scroll-margin-top: 112px;
}

.page-about .ab-chapter::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--lh-amber), rgba(232, 114, 28, 0));
}

.page-about .ab-chapter__title {
  margin: 0 0 16px;
  font-family: var(--lh-font-head);
  font-weight: 800;
  font-size: clamp(21px, 4.2vw, 31px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--lh-paper);
}

.page-about .ab-chapter > p {
  margin: 0 0 14px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--lh-muted);
}

.page-about .ab-chapter > p a,
.page-about .ab-chapter > p a:visited {
  color: var(--lh-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 163, 60, 0.4);
}

.page-about .ab-chapter > p a:hover {
  color: var(--lh-paper);
  border-bottom-color: var(--lh-paper);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-tl {
  display: flex;
  gap: 14px;
  margin: 0;
  padding: 4px 2px 16px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-tl__node {
  flex: 0 0 84%;
  min-width: 0;
  scroll-snap-align: start;
}

.page-about .ab-tl__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  padding: 22px 18px 18px;
  border: 1px solid var(--lh-line);
  background: var(--lh-rock);
}

.page-about .ab-tl__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--lh-clay);
}

.page-about .ab-tl__node--mid .ab-tl__card::before {
  background: var(--lh-moss);
}

.page-about .ab-tl__node--now .ab-tl__card::before {
  background: var(--lh-amber);
  box-shadow: 0 0 14px rgba(232, 114, 28, 0.55);
}

.page-about .ab-tl__range {
  font-family: var(--lh-font-mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--lh-gold);
}

.page-about .ab-tl__title {
  margin: 0;
  font-family: var(--lh-font-head);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--lh-paper);
}

.page-about .ab-tl__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--lh-dim);
}

/* ---------- 展开组件（页面内形态） ---------- */
.page-about .lh-expand__icon {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.2s ease;
}

.page-about .lh-expand[data-state="open"] .lh-expand__icon {
  transform: rotate(-135deg) translate(-1px, -1px);
}

.page-about .ab-tl .lh-expand__trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
  padding: 7px 12px;
  border: 1px solid var(--lh-line);
  background: transparent;
  color: var(--lh-gold);
  font-family: var(--lh-font-body);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about .ab-tl .lh-expand__trigger:hover {
  border-color: rgba(242, 163, 60, 0.55);
  color: var(--lh-paper);
}

.page-about .lh-panel {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid rgba(232, 114, 28, 0.45);
}

.page-about .lh-panel p {
  margin: 0;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--lh-muted);
}

/* ---------- 团队分工 ---------- */
.page-about .ab-roles {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-about .ab-role {
  border: 1px solid var(--lh-line);
  background: rgba(35, 34, 43, 0.62);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .ab-role:hover {
  border-color: var(--lh-line-strong);
}

.page-about .ab-role[data-state="open"] {
  border-color: rgba(232, 114, 28, 0.5);
  background: rgba(35, 34, 43, 0.9);
}

.page-about .ab-role .lh-expand__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 17px 18px;
  border: 0;
  background: transparent;
  color: var(--lh-paper);
  font-family: var(--lh-font-head);
  font-size: 16px;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.page-about .ab-role .lh-expand__text {
  display: inline-block;
}

.page-about .ab-role .lh-panel {
  margin: 0 18px 18px;
}

.page-about .ab-roles__actions {
  margin-top: 16px;
}

/* ---------- 门槛键值表 ---------- */
.page-about .ab-kv {
  display: grid;
  gap: 1px;
  margin: 6px 0 18px;
  border: 1px solid var(--lh-line);
  background: var(--lh-line);
}

.page-about .ab-kv .lh-kv {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 14px 16px;
  background: rgba(17, 16, 22, 0.94);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .ab-kv .lh-kv > span:first-child {
  flex: 0 0 auto;
  font-family: var(--lh-font-mono);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--lh-neon);
}

.page-about .ab-kv .lh-kv > span:last-child {
  color: var(--lh-muted);
}

/* ---------- 按钮组 ---------- */
.page-about .ab-next {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 6px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 760px) {
  .page-about .ab-stats__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-tl__node {
    flex: 0 0 300px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 42px;
  }

  .page-about .ab-hero__lead {
    padding-top: 12px;
  }

  .page-about .ab-media--hero {
    aspect-ratio: 4 / 3;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-body {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: 104px;
  }

  .page-about .ab-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .ab-index__link {
    white-space: normal;
  }

  .page-about .ab-chapter {
    padding-top: 34px;
  }

  .page-about .ab-roles {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}
<<<END>>>