.page-about {
  background: var(--ink-950);
  color: var(--chalk);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(2.6rem, 6vw, 4.6rem);
  border-bottom: var(--bd);
  background:
    radial-gradient(110% 80% at 88% -20%, rgba(61, 232, 192, 0.12), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(30, 92, 70, 0.32) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(90deg, rgba(30, 92, 70, 0.2) 0 1px, transparent 1px 84px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 0.7rem 0 0;
  max-width: 20ch;
  font-size: clamp(2rem, 6.2vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-hero__mark {
  color: var(--cyan);
  box-shadow: inset 0 -0.16em 0 rgba(61, 232, 192, 0.16);
}

.page-about .about-hero__lead {
  margin-top: 1.35rem;
  max-width: 62ch;
  color: var(--chalk);
  opacity: 0.9;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.9rem;
}

/* ---------- 起点与主张 ---------- */
.page-about .about-origin__body {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.9rem;
}

.page-about .about-origin__text p {
  margin: 0 0 1.05em;
}

.page-about .about-origin__text p:last-child {
  margin-bottom: 0;
  color: var(--chalk);
  font-weight: 600;
}

.page-about .about-origin__lines {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.page-about .line-item {
  padding: 1.05rem 1.1rem 1.05rem 1.3rem;
  background: var(--ink-900);
  border: var(--bd);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .line-item__name {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .line-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 发展阶段 ---------- */
.page-about .about-phases__layout {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.9rem;
}

.page-about .phase-rail {
  padding-left: 0.9rem;
  border-left: 1px solid var(--ink-800);
}

.page-about .phase-rail__head {
  margin: 0 0 0.7rem;
}

.page-about .phase-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.12rem;
}

.page-about .phase-rail__link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0.6rem;
  color: var(--mist);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.4;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .phase-rail__link:hover,
.page-about .phase-rail__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(61, 232, 192, 0.07);
}

.page-about .phase-rail__num {
  color: var(--board-500);
  font-size: 0.78rem;
}

.page-about .phase-rail__link:hover .phase-rail__num,
.page-about .phase-rail__link:focus-visible .phase-rail__num {
  color: var(--cyan);
}

.page-about .phase-flow {
  display: grid;
  gap: 1.4rem;
}

.page-about .phase-card {
  position: relative;
  padding: 1.4rem 1.3rem;
  background: var(--ink-900);
  border: var(--bd);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 0 rgba(18, 48, 38, 0.85);
  scroll-margin-top: calc(var(--frame-h) + 1.5rem);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .phase-card:hover {
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 0 rgba(61, 232, 192, 0.22);
}

.page-about .phase-card__tag {
  display: inline-block;
}

.page-about .phase-card__title {
  margin: 0.8rem 0 0.6rem;
  font-size: clamp(1.18rem, 2.4vw, 1.48rem);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .phase-card__text {
  margin: 0 0 0.95rem;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .phase-card__result {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--ink-800);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--chalk);
}

.page-about .phase-card__result .mono {
  margin-right: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

/* ---------- 图片组件 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: var(--bd);
  border-radius: var(--radius);
  background: var(--ink-900);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.78) brightness(0.9) hue-rotate(-8deg);
}

.page-about .about-figure__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.34rem 0.72rem;
  background: var(--paper);
  color: var(--ink-950);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  border-top-right-radius: var(--radius);
}

.page-about .about-figure--archive {
  max-width: 440px;
  justify-self: start;
}

.page-about .about-figure--archive img {
  aspect-ratio: 4 / 5;
}

.page-about .about-figure--desk img {
  aspect-ratio: 16 / 10;
}

.page-about .about-figure--map {
  margin-top: 1.9rem;
}

.page-about .about-figure--map img {
  aspect-ratio: 16 / 9;
}

/* ---------- 数字条 ---------- */
.page-about .about-numbers {
  margin-top: clamp(2.4rem, 6vw, 4.2rem);
  padding: clamp(1.9rem, 5vw, 3.4rem) 0;
  position: relative;
  border-top: var(--bd);
  border-bottom: var(--bd);
  background: linear-gradient(135deg, rgba(30, 92, 70, 0.55) 0%, var(--ink-900) 52%, var(--ink-950) 100%);
}

.page-about .about-numbers::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -40%;
  width: 44%;
  aspect-ratio: 1 / 1;
  pointer-events: none;
  background: radial-gradient(circle, rgba(61, 232, 192, 0.14), transparent 68%);
}

.page-about .about-numbers > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-numbers__title {
  margin: 0.55rem 0 0;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-numbers__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 0.9rem;
  margin: 1.7rem 0 0;
}

.page-about .about-numbers__item {
  display: flex;
  flex-direction: column-reverse;
  gap: 0.4rem;
  padding-left: 0.85rem;
  border-left: 2px solid var(--ink-800);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-numbers__item:hover {
  border-left-color: var(--cyan);
}

.page-about .about-numbers__num {
  margin: 0;
  font-family: var(--font-data);
  font-size: clamp(1.8rem, 5.4vw, 3.1rem);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.page-about .about-numbers__unit {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  line-height: 1.4;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: 1.9rem;
  margin-top: 1.9rem;
}

.page-about .about-team__text .lead {
  margin: 0;
}

.page-about .about-team__flow {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--ink-800);
}

.page-about .flow-step:last-child {
  border-bottom: 1px solid var(--ink-800);
}

.page-about .flow-step__num {
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  padding-top: 0.24rem;
}

.page-about .flow-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-team__note {
  margin: 1.25rem 0 0;
  padding: 0.9rem 1.05rem;
  border-left: 2px solid var(--alert);
  background: rgba(255, 122, 61, 0.06);
  border-radius: var(--radius);
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--chalk);
}

.page-about .team-grid {
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.page-about .team-card {
  padding: 1.15rem 1.2rem;
  background: var(--ink-900);
  border: var(--bd);
  border-top: 2px solid var(--board-500);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .team-card:hover {
  border-top-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .team-card__name {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .team-card__count {
  margin: 0.35rem 0 0.55rem;
  font-family: var(--font-data);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .team-card p:last-child {
  margin: 0;
  font-size: 0.89rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 城市覆盖 ---------- */
.page-about .city-grid {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.page-about .city-card {
  padding: 1.25rem 1.2rem;
  background: linear-gradient(180deg, var(--ink-900), var(--ink-950));
  border: var(--bd);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .city-card:hover,
.page-about .city-card:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(61, 232, 192, 0.22), 0 10px 22px rgba(0, 0, 0, 0.35);
}

.page-about .city-card__name {
  margin: 0;
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .city-card__name::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-top: 0.55rem;
  background: var(--board-500);
  transition: width var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .city-card:hover .city-card__name::after {
  width: 62px;
  background: var(--cyan);
}

.page-about .city-card .tag {
  display: inline-block;
  margin-top: 0.75rem;
}

.page-about .city-card__desc {
  margin: 0.75rem 0 0;
  font-size: 0.91rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__inner {
  max-width: 68ch;
  margin: 0 auto;
}

.page-about .about-partners__text p {
  margin: 0 0 1.05em;
}

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

.page-about .about-partners__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(2.4rem, 6vw, 3.8rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-about .about-cta__inner {
  max-width: 56rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border: var(--bd);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 130% at 100% 0%, rgba(61, 232, 192, 0.1), transparent 62%),
    var(--ink-900);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .about-cta__text {
  margin: 0.85rem 0 0;
  max-width: 54ch;
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.75;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.68rem;
  margin-top: 1.6rem;
}

/* ---------- 中大屏 ---------- */
@media (min-width: 900px) {
  .page-about .about-phases__layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-about .phase-rail {
    position: sticky;
    top: calc(var(--frame-h) + 1.4rem);
    align-self: start;
  }

  .page-about .phase-card {
    padding: 1.9rem 2rem;
  }

  .page-about .phase-card--shift {
    margin-left: 3.2rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-origin__body {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3.4rem;
    align-items: start;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 3rem;
    align-items: start;
  }
}

@media (min-width: 720px) {
  .page-about .about-numbers__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.8rem 1.2rem;
  }
}

@media (min-width: 1080px) {
  .page-about .about-numbers__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .phase-rail__link,
  .page-about .phase-card,
  .page-about .about-numbers__item,
  .page-about .team-card,
  .page-about .city-card,
  .page-about .city-card__name::after {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }
}
<<<END>>>