.page-about {
  --about-measure: 660px;
  --about-rail-w: 74px;
  color: var(--paper);
  padding-bottom: 72px;
}

.page-about .about-crumbs {
  margin: 22px 0 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 56px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1.2;
  letter-spacing: 0.04em;
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 38px 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--panel-soft);
  padding: 15px 16px 17px;
  min-width: 0;
}

.page-about .about-stat dt {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-stat dd {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-stat:first-child dd {
  color: var(--gold);
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 筛选条 ---------- */
.page-about .about-filters {
  margin: 32px 0 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 长卷骨架 ---------- */
.page-about .about-longform {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: 32px;
}

.page-about .about-column {
  min-width: 0;
}

/* ---------- 左侧年份刻度 ---------- */
.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 0 32px;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-rail__label {
  flex: 0 0 auto;
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-rail__list {
  display: flex;
  flex: 0 0 auto;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tick {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 9px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}

.page-about .about-tick::before {
  content: "";
  display: block;
  width: 8px;
  height: 1px;
  background: var(--line);
}

.page-about .about-tick:hover,
.page-about .about-tick:focus-visible {
  color: var(--cyan);
  outline: none;
}

.page-about .about-tick:hover::before,
.page-about .about-tick:focus-visible::before {
  background: var(--cyan);
}

@media (min-width: 1000px) {
  .page-about .about-longform {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: 44px;
    padding-top: 48px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    align-self: start;
    display: block;
    overflow: visible;
    margin: 0;
    padding: 4px 0 4px 12px;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .about-rail__label {
    margin-bottom: 14px;
  }

  .page-about .about-rail__list {
    display: block;
  }

  .page-about .about-tick {
    display: flex;
    padding: 7px 0;
    border-radius: 0;
  }
}

/* ---------- 区块 ---------- */
.page-about .about-section {
  padding: 0 0 64px;
  scroll-margin-top: 96px;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line);
  padding-top: 60px;
}

.page-about .about-section__main {
  min-width: 0;
  max-width: 680px;
}

.page-about .about-section__aside {
  margin-top: 28px;
  min-width: 0;
}

@media (min-width: 1140px) {
  .page-about .about-section {
    display: grid;
    grid-template-columns: minmax(0, var(--about-measure)) minmax(0, 1fr);
    column-gap: 52px;
    align-items: start;
  }

  .page-about .about-section__aside {
    margin-top: 16px;
    padding-top: 8px;
  }
}

.page-about .about-h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.34;
  letter-spacing: 0.03em;
  margin: 12px 0 0;
  color: var(--paper);
  max-width: 16em;
}

.page-about .about-section__main > .body-copy {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 档案卡 ---------- */
.page-about .about-note {
  border: 1px solid rgba(87, 217, 208, 0.4);
  border-radius: 16px 6px 18px 8px;
  padding: 18px 18px 20px;
  background: transparent;
  max-width: 280px;
}

.page-about .about-note__kicker {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-note__figure {
  margin: 12px 0 0;
  font-family: var(--mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  line-height: 1.15;
}

.page-about .about-note__text {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 年份列表 ---------- */
.page-about .about-years {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-year {
  position: relative;
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  column-gap: 16px;
  padding: 16px 0 16px 16px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 104px;
}

.page-about .about-year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 7px;
  height: 1px;
  background: var(--line);
}

.page-about .about-year:target::before {
  background: var(--cyan);
  height: 2px;
}

.page-about .about-year:target .about-year__num {
  color: var(--gold);
}

.page-about .about-year__num {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

.page-about .about-year__body {
  min-width: 0;
}

.page-about .about-year__label {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-year__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-about .about-year {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 24px;
    padding-left: 22px;
  }

  .page-about .about-year::before {
    top: 24px;
    width: 10px;
  }
}

/* ---------- 图文 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
}

.page-about .about-figure--banner {
  margin: 0 0 30px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-soft);
  background: var(--panel-soft);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-role {
  background: var(--panel-soft);
  padding: 18px 18px 20px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
}

.page-about .about-role__count {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.page-about .about-role__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .about-role__desc {
  grid-column: 1 / -1;
  margin-top: 9px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 五段流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-about .about-flow__step {
  position: relative;
  padding: 0 0 30px 52px;
  min-height: 44px;
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 42px;
  bottom: 6px;
  width: 1px;
  background: var(--line);
}

.page-about .about-flow__step:last-child::before {
  content: none;
}

.page-about .about-flow__step:last-child {
  padding-bottom: 4px;
}

.page-about .about-flow__index {
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-flow__name {
  margin: 0;
  padding-top: 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--paper);
}

.page-about .about-flow__desc {
  margin: 8px 0 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.page-about .about-flow__step:hover .about-flow__index,
.page-about .about-flow__step:focus-within .about-flow__index {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-flow__step:hover .about-flow__desc,
.page-about .about-flow__step:focus-within .about-flow__desc {
  color: var(--paper);
}

.page-about .about-flow__step:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ---------- 数字网格 ---------- */
.page-about .about-metrics {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metric {
  background: var(--panel-soft);
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-metric__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-metric__value {
  font-family: var(--mono);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  text-align: right;
  letter-spacing: -0.01em;
}

@media (min-width: 700px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 抽检对照 ---------- */
.page-about .about-review {
  margin: 30px 0 0;
  border: 1px solid var(--line);
  border-radius: 6px 18px 8px 16px;
  padding: 18px 18px 20px;
  background: var(--panel-soft);
}

.page-about .about-review__title {
  margin: 0;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-review__list {
  list-style: none;
  counter-reset: review;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-review__list li {
  counter-increment: review;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-review__list li::before {
  content: "0" counter(review);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.05em;
}

@media (min-width: 560px) {
  .page-about .about-review__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 20px;
  }
}

/* ---------- 联系方式 ---------- */
.page-about .about-contact {
  margin: 30px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__row dt {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

@media (min-width: 620px) {
  .page-about .about-contact__row {
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 20px;
    align-items: baseline;
  }
}

/* ---------- 收口 ---------- */
.page-about .about-column > .about-section:last-child {
  padding-bottom: 24px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tick,
  .page-about .about-flow__index,
  .page-about .about-flow__desc,
  .page-about .about-year__num {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>