.page-about {
  --about-measure: 38rem;
  --about-gap: clamp(2.25rem, 6vw, 4.5rem);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  padding-bottom: clamp(4rem, 9vw, 8rem);
  background-image: radial-gradient(120% 55% at 88% 0%, rgba(59, 232, 206, 0.09), transparent 62%);
}

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

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  font-size: 0.8125rem;
}

.page-about .breadcrumb-list a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb-list a:hover,
.page-about .breadcrumb-list a:focus-visible {
  color: var(--cyan);
}

/* ---------- 开篇 ---------- */
.page-about .about-masthead {
  padding: clamp(1.75rem, 5vw, 3.25rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 4.75rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0.75rem 0 0;
  max-width: 15em;
  text-wrap: balance;
}

.page-about .about-lede {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  max-width: var(--about-measure);
  color: var(--white);
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.95;
}

.page-about .about-kpi {
  list-style: none;
  margin: clamp(2.25rem, 5vw, 3.5rem) 0 0;
  padding: clamp(1.5rem, 3vw, 2rem) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 1.25rem;
}

.page-about .about-kpi-item {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-about .about-kpi-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4.6vw, 3.25rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums lining-nums;
}

.page-about .about-kpi-label {
  display: block;
  margin-top: 0.625rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 通用区块骨架 ---------- */
.page-about .about-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
  padding: var(--about-gap) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-block-last {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-rail-label {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.6rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 1.25rem;
  max-width: 22em;
}

.page-about .about-h3 {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.375rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin: clamp(2rem, 4vw, 2.75rem) 0 0.75rem;
  color: var(--cyan-soft);
}

.page-about .about-p {
  margin: 0 0 1.125rem;
  max-width: var(--about-measure);
  line-height: 1.95;
}

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

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  max-width: 44rem;
}

.page-about .about-figure-wide {
  max-width: 52rem;
}

.page-about .about-figure .media-caption {
  margin-top: 0.875rem;
}

/* ---------- 覆盖版图：三城 ---------- */
.page-about .about-cities {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-city {
  background: var(--ink);
  padding: clamp(1.25rem, 3vw, 1.75rem) clamp(1rem, 2.5vw, 1.5rem);
  transition: background-color 0.32s var(--ease);
}

.page-about .about-city:hover,
.page-about .about-city:focus-within {
  background: var(--veil);
}

.page-about .about-city-name {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  font-weight: 900;
  letter-spacing: 0.02em;
  margin: 0 0 0.75rem;
  color: var(--white);
}

.page-about .about-city-desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--white);
}

.page-about .about-city-note {
  margin: 0.875rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
}

/* ---------- 五项指标数据带 ---------- */
.page-about .about-strip {
  display: flex;
  gap: 1px;
  margin: 1.25rem 0 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-about .about-strip::-webkit-scrollbar {
  height: 3px;
}

.page-about .about-strip::-webkit-scrollbar-thumb {
  background: var(--cyan);
}

.page-about .about-strip-cell {
  flex: 0 0 min(58%, 15rem);
  scroll-snap-align: start;
  background: var(--ink);
  padding: 1.125rem 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-about .about-strip-name {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-strip-desc {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 切角数据板（全页共两处） ---------- */
.page-about .about-cut {
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0;
  padding: clamp(1.25rem, 3vw, 1.875rem);
  background: linear-gradient(158deg, rgba(59, 232, 206, 0.11), rgba(7, 18, 15, 0.72) 68%);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
  max-width: 46rem;
}

.page-about .about-minutes-list,
.page-about .about-run-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.125rem;
}

.page-about .about-minute-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.375rem;
  padding-bottom: 1.125rem;
  border-bottom: 1px solid rgba(59, 232, 206, 0.16);
}

.page-about .about-minute-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-minute-key {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-minute-val {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lava);
  font-variant-numeric: tabular-nums;
}

.page-about .about-minute-desc {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--white);
}

.page-about .about-run-item {
  padding-left: 1.5rem;
  position: relative;
}

.page-about .about-run-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--cyan);
  transform: skewX(calc(-1 * var(--slant)));
}

.page-about .about-run-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
  margin-bottom: 0.375rem;
}

.page-about .about-run-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
}

/* ---------- 归档流程 ---------- */
.page-about .about-flow {
  list-style: none;
  counter-reset: none;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-about .about-flow-item {
  position: relative;
  padding: 0 0 1.5rem 1.5rem;
}

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

.page-about .about-flow-item::before {
  content: "";
  position: absolute;
  left: -0.3125rem;
  top: 0.55em;
  width: 0.5625rem;
  height: 0.5625rem;
  background: var(--cyan);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-about .about-flow-step {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lava);
  margin-bottom: 0.5rem;
  font-variant-numeric: tabular-nums;
}

.page-about .about-flow-item p {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 0.9375rem;
  line-height: 1.9;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.25rem;
}

.page-about .about-team-item {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.page-about .about-team-name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cyan);
  margin-bottom: 0.5rem;
}

.page-about .about-team-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--white);
}

/* ---------- 行动区 ---------- */
.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.875rem 1.5rem;
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-textlink {
  color: var(--cyan);
  font-size: 0.875rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 232, 206, 0.4);
  padding-bottom: 0.125rem;
}

.page-about .about-textlink:hover,
.page-about .about-textlink:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-kpi {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }

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

  .page-about .about-strip-cell {
    flex-basis: min(30%, 13.5rem);
  }

  .page-about .about-minute-item {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    column-gap: 1.5rem;
    align-items: baseline;
  }

  .page-about .about-minute-key {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-minute-val {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .about-minute-desc {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-block {
    grid-template-columns: minmax(0, 2.5fr) minmax(0, 9.5fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.625rem;
    position: sticky;
    top: 7rem;
    align-self: start;
  }

  .page-about .about-num {
    font-size: 2.5rem;
  }

  .page-about .about-figure {
    margin-left: auto;
  }
}

@media (min-width: 1180px) {
  .page-about .about-h1 {
    font-size: clamp(3.25rem, 5.2vw, 4.75rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-city,
  .page-about .about-strip {
    transition: none;
    scroll-behavior: auto;
  }
}