.page-about {
  --ab-text: #C6CDE9;
  --ab-rail: 148px;
  background: var(--ink);
  color: var(--snow);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 128px);
}

.page-about .breadcrumb {
  padding-top: clamp(16px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--edge);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  padding: 6px 0;
  display: inline-block;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a[aria-current="page"] {
  color: var(--snow);
}

/* 首屏 */
.page-about .ab-hero {
  display: grid;
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
  padding: clamp(20px, 3vw, 36px) 0 clamp(48px, 8vw, 104px);
}

.page-about .eyebrow {
  margin: 0 0 18px;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .ab-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--ab-text);
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--edge);
  padding-top: 22px;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-stat__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.6vw, 40px);
  line-height: 1;
  color: var(--lava);
  letter-spacing: -0.01em;
}

.page-about .ab-stat:nth-child(2) .ab-stat__num {
  color: var(--lake);
}

.page-about .ab-stat:nth-child(3) .ab-stat__num {
  color: var(--gold);
}

.page-about .ab-stat__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ab-hero__media {
  margin: 0;
}

/* 图片通用 */
.page-about .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-about .ab-hero__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.page-about .ab-hero__media .media__cap,
.page-about .ab-figure .media__cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .ab-figure {
  margin: 0;
}

.page-about .ab-figure--wide {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.page-about .ab-figure--tall {
  aspect-ratio: 3 / 4;
  overflow: hidden;
  align-self: start;
}

/* 长卷骨架 */
.page-about .ab-scroll {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .ab-rail {
  position: relative;
  padding-bottom: 8px;
}

.page-about .ab-rail ol {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-rail a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-height: 44px;
  padding: 11px 14px;
  border: 1px solid var(--edge);
  color: var(--mist);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .ab-rail a:hover,
.page-about .ab-rail a:focus-visible {
  color: var(--snow);
  border-color: var(--lava);
  background: rgba(255, 90, 42, 0.08);
}

.page-about .ab-rail__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--lava);
}

/* 章节 */
.page-about .ab-body {
  min-width: 0;
}

.page-about .ab-chapter {
  position: relative;
  padding: clamp(40px, 6vw, 82px) 0;
  border-top: 1px solid var(--edge);
}

.page-about .ab-chapter:first-child {
  border-top: 0;
  padding-top: clamp(12px, 2vw, 20px);
}

.page-about .ab-chapter--tint {
  background-image:
    radial-gradient(120% 70% at 88% 12%, rgba(255, 90, 42, 0.11), rgba(255, 90, 42, 0) 62%),
    radial-gradient(90% 60% at 4% 88%, rgba(47, 211, 192, 0.1), rgba(47, 211, 192, 0) 60%),
    linear-gradient(180deg, rgba(20, 26, 68, 0) 0%, rgba(20, 26, 68, 0.9) 32%, rgba(20, 26, 68, 0) 100%);
}

.page-about .ab-chapter:target .ab-chapter__num {
  color: var(--gold);
}

.page-about .ab-chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-about .ab-chapter__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1;
  color: var(--lava);
  letter-spacing: -0.02em;
  transition: color 0.25s var(--ease);
}

.page-about .ab-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-about .ab-chapter__body {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: start;
}

.page-about .ab-quote {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.3vw, 27px);
  line-height: 1.55;
  color: var(--snow);
  border-left: 2px solid var(--lake);
  padding-left: 16px;
}

.page-about .ab-prose {
  max-width: 68ch;
}

.page-about .ab-prose p {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--ab-text);
}

.page-about .ab-prose p + p {
  margin-top: 16px;
}

.page-about .ab-prose--lead {
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .ab-prose a,
.page-about .ab-next__note a {
  color: var(--lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 211, 192, 0.4);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .ab-prose a:hover,
.page-about .ab-prose a:focus-visible,
.page-about .ab-next__note a:hover,
.page-about .ab-next__note a:focus-visible {
  color: var(--snow);
  border-color: var(--snow);
}

.page-about .ab-inline-link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* 场景 */
.page-about .ab-scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 30px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-scenes__item {
  padding-top: 18px;
  border-top: 1px solid var(--edge);
}

.page-about .ab-scenes__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-about .ab-scenes__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.3;
  color: var(--snow);
}

.page-about .ab-scenes__item p {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 16px);
  line-height: 1.8;
  color: var(--ab-text);
}

/* 时间轴 */
.page-about .ab-timeline {
  display: flex;
  gap: 0;
  margin-top: clamp(26px, 3.4vw, 40px);
  padding: 0 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-timeline__item {
  position: relative;
  flex: 0 0 min(210px, 62vw);
  padding: 22px 18px 0 0;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--edge);
}

.page-about .ab-timeline__item::after {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--lake);
}

.page-about .ab-timeline__item--now::after {
  background: var(--lava);
  box-shadow: 0 0 0 4px rgba(255, 90, 42, 0.18);
}

.page-about .ab-timeline__phase {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lake);
  margin-bottom: 6px;
}

.page-about .ab-timeline__item--now .ab-timeline__phase {
  color: var(--lava);
}

.page-about .ab-timeline__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.3;
  color: var(--snow);
  margin-bottom: 8px;
}

.page-about .ab-timeline__note {
  display: block;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  transition: color 0.2s var(--ease);
}

.page-about .ab-timeline__item:hover .ab-timeline__note,
.page-about .ab-timeline__item:focus-within .ab-timeline__note {
  color: var(--snow);
}

/* 团队 */
.page-about .ab-teams {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0 0 clamp(24px, 3vw, 40px);
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--edge);
}

.page-about .ab-teams__item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--edge);
}

.page-about .ab-teams__key {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--gold);
}

.page-about .ab-teams__desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-text);
}

/* 第 12 期 */
.page-about .ab-node12 {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .ab-node12__figure {
  display: flex;
  align-items: baseline;
  gap: 8px;
  line-height: 0.8;
}

.page-about .ab-node12__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(110px, 24vw, 190px);
  line-height: 0.78;
  letter-spacing: -0.04em;
  background-image: linear-gradient(150deg, var(--gold) 0%, var(--lava) 55%, var(--ember) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .ab-node12__unit {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.4vw, 28px);
  color: var(--mist);
}

/* 结尾 */
.page-about .ab-next {
  margin-top: clamp(40px, 6vw, 80px);
  padding: clamp(28px, 4vw, 52px) 0 0;
  border-top: 1px solid var(--edge);
}

.page-about .ab-next__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--lake);
}

.page-about .ab-next__title {
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--snow);
  max-width: 22ch;
}

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

.page-about .ab-next__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 640px) {
  .page-about .ab-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .ab-teams__item {
    padding: 20px 20px 20px 0;
    border-bottom: 0;
    border-top: 1px solid var(--edge);
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .ab-chapter__body--a {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .ab-chapter__body--b {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .ab-chapter__body--c {
    grid-template-columns: 7fr 5fr;
  }

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

  .page-about .ab-teams {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid var(--edge);
  }

  .page-about .ab-teams__item {
    padding: 22px 24px 24px 0;
    border-top: 1px solid var(--edge);
    border-bottom: 0;
  }

  .page-about .ab-node12 {
    grid-template-columns: 5fr 7fr;
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-scroll {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 72px);
  }

  .page-about .ab-rail {
    position: sticky;
    top: calc(var(--head-h) + 28px);
    align-self: start;
  }

  .page-about .ab-rail ol {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .ab-rail a {
    width: 100%;
    padding: 10px 12px;
    font-size: 12.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-rail a,
  .page-about .ab-chapter__num,
  .page-about .ab-timeline__note,
  .page-about .ab-prose a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>