.page-about {
  --about-line: rgba(242, 234, 221, .14);
  --about-line-soft: rgba(242, 234, 221, .07);
  --about-dim: rgba(242, 234, 221, .62);
  --about-faint: rgba(242, 234, 221, .42);
  background: var(--night);
  color: var(--cream);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 32px 0 0;
  background: linear-gradient(180deg, var(--night) 0%, var(--stand) 140%);
}

.page-about .about-hero .b8-shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .b8-breadcrumb {
  margin-bottom: 40px;
}

.page-about .about-hero__title {
  margin: 20px 0 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(34px, 9vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  max-width: 640px;
  margin: 24px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 48px;
  margin: 44px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__fact {
  margin: 0;
}

.page-about .about-hero__fact dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--about-faint);
}

.page-about .about-hero__fact dd {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  color: var(--amber);
}

.page-about .about-hero__media {
  margin-top: 56px;
  padding-bottom: 8px;
}

/* ---------- 通用章节头 ---------- */

.page-about .about-section-title {
  margin: 16px 0 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(26px, 5.4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--cream);
}

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

/* ---------- 起点章节 ---------- */

.page-about .about-chapter {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-chapter__no {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .32em;
  color: var(--about-faint);
  padding-top: 8px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(26px, 5.4vw, 44px);
  line-height: 1.15;
  color: var(--cream);
}

.page-about .about-prose {
  margin-top: 24px;
  color: var(--about-dim);
}

.page-about .about-prose p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
}

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

/* ---------- 团队 ---------- */

.page-about .about-team {
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  margin-top: 40px;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-crew {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-crew__row {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 22px 0 22px 12px;
  border-top: 1px solid var(--about-line);
  transition: transform .2s cubic-bezier(.2, 0, 0, 1);
}

.page-about .about-crew__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--lake);
  opacity: 0;
  transition: opacity .2s, background .2s;
}

.page-about .about-crew__row:hover,
.page-about .about-crew__row:focus-within {
  transform: translateX(4px);
}

.page-about .about-crew__row:hover::before,
.page-about .about-crew__row:focus-within::before {
  opacity: 1;
  background: var(--score);
}

.page-about .about-crew__icon {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 2px;
  color: var(--lake);
}

.page-about .about-crew__row:hover .about-crew__icon,
.page-about .about-crew__row:focus-within .about-crew__icon {
  color: var(--glint);
}

.page-about .about-crew__main h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cream);
}

.page-about .about-crew__main p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-crew__shift {
  grid-column: 2;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--amber);
  opacity: 0;
  transition: opacity .2s;
}

.page-about .about-crew__row:hover .about-crew__shift,
.page-about .about-crew__row:focus-within .about-crew__shift {
  opacity: 1;
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-stats {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-stats__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 26px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-stats__name {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--glint);
}

.page-about .about-stats__note {
  margin: 8px 0 0;
  max-width: 500px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-dim);
}

.page-about .about-stats__figure {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-stats__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(46px, 13vw, 88px);
  line-height: .92;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.page-about .about-stats__unit {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--about-faint);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  border-top: 1px solid var(--about-line-soft);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 40px;
  left: 21px;
  width: 1px;
  background: var(--about-line);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 40px 64px;
}

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

.page-about .about-tl__node {
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(242, 234, 221, .3);
  background: var(--night);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--about-dim);
  text-decoration: none;
  transition: border-color .18s, color .18s, background .18s;
}

.page-about .about-tl__node:hover,
.page-about .about-tl__node:focus-visible {
  border-color: var(--glint);
  color: var(--glint);
  background: var(--stand);
}

.page-about .about-tl__item--current .about-tl__node {
  border-color: var(--score);
  color: var(--score);
  background: rgba(255, 90, 43, .08);
}

.page-about .about-tl__bubble {
  position: absolute;
  left: 0;
  top: 54px;
  z-index: 3;
  max-width: 260px;
  padding: 8px 12px;
  background: var(--cream);
  color: var(--ink);
  font-size: 12px;
  line-height: 1.5;
  border-left: 3px solid var(--score);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .18s, transform .18s, visibility .18s;
}

.page-about .about-tl__item:hover .about-tl__bubble,
.page-about .about-tl__item:focus-within .about-tl__bubble {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-tl__body h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-tl__body p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-dim);
}

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

.page-about .about-timeline__figure {
  margin: 48px 0 0;
}

/* ---------- 纠错流程 ---------- */

.page-about .about-flow {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--about-line);
}

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

.page-about .about-flow__no {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--score);
}

.page-about .about-flow__step h3 {
  margin: 10px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--cream);
}

.page-about .about-flow__step p {
  margin: 10px 0 0;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .about-next {
  margin-top: 48px;
  padding: 28px 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-next__text {
  margin: 0 0 20px;
  max-width: 560px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cream);
}

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

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero {
    padding-top: 48px;
  }

  .page-about .about-hero__media {
    margin-top: 72px;
  }

  .page-about .about-stats__item {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 30px 0;
  }

  .page-about .about-stats__figure {
    justify-content: flex-end;
    text-align: right;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

  .page-about .about-chapter {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-crew__row {
    padding: 24px 0 24px 16px;
  }

  .page-about .about-tl__item {
    padding-left: 88px;
  }

  .page-about .about-tl::before {
    left: 21px;
  }

  .page-about .about-tl__bubble {
    left: 64px;
    top: -2px;
    max-width: 220px;
  }

  .page-about .about-tl__item:hover .about-tl__bubble,
  .page-about .about-tl__item:focus-within .about-tl__bubble {
    transform: translateX(4px);
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero__title {
    max-width: 15ch;
  }

  .page-about .about-stats__num {
    font-size: 96px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-about .about-flow__step {
    border-bottom: none;
    border-top: 1px solid var(--about-line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew__row,
  .page-about .about-tl__node,
  .page-about .about-tl__bubble {
    transition: none;
  }

  .page-about .about-crew__row:hover,
  .page-about .about-crew__row:focus-within {
    transform: none;
  }
}
<<<END>>>