.page-about {
  --abo-gap-lg: clamp(44px, 6vw, 76px);
  --abo-gap-md: clamp(24px, 3.5vw, 40px);
  --team-mint: currentColor;
  padding-bottom: clamp(56px, 8vw, 96px);
  color: var(--fog);
}

.page-about .page-about__crumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3vw, 36px) 0 clamp(36px, 5vw, 58px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(43, 58, 70, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 58, 70, 0.32) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(120deg, rgba(0, 0, 0, 0.9), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--arc), var(--line) 48%, transparent 88%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(31px, 5.6vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--lemon);
  box-shadow: inset 0 -0.18em 0 rgba(43, 231, 255, 0.26);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--cold);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  padding: 14px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-about .hero-figures__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 12px 14px;
  border-left: 2px solid var(--line);
  background: linear-gradient(180deg, rgba(43, 231, 255, 0.05), transparent 78%);
}

.page-about .hero-figures__cell:first-child {
  border-left-color: var(--arc);
  box-shadow: inset 2px 0 0 rgba(43, 231, 255, 0.45);
}

.page-about .hero-figures__num {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--lemon);
}

.page-about .hero-figures__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--cold);
}

/* ---------- 通用区块 ---------- */
.page-about .section {
  padding-block: var(--abo-gap-lg);
  border-top: 2px solid var(--line);
}

.page-about .section:first-of-type {
  border-top: none;
}

.page-about .section__title {
  margin: 8px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
}

.page-about .section__lede {
  margin: 12px 0 0;
  max-width: 64ch;
  color: var(--cold);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .section p {
  line-height: 1.8;
}

/* ---------- 出发点 ---------- */
.page-about .gaps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--abo-gap-md);
}

.page-about .gaps__text p {
  margin: 16px 0 0;
  color: var(--cold);
  font-size: 15.5px;
}

.page-about .gaps__text p:first-of-type {
  margin-top: 20px;
  color: var(--fog);
}

.page-about .gaps__aside {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .verdict {
  margin: 0;
  padding: 22px 20px 18px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--arc);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-about .verdict p {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(18px, 2.3vw, 22px);
  line-height: 1.62;
  color: var(--fog);
}

.page-about .verdict__by {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  color: var(--cold);
  letter-spacing: 0.04em;
}

.page-about .gap-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .gap-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border: 2px solid var(--line);
  background: #0d141b;
  font-size: 14px;
  line-height: 1.65;
  color: var(--cold);
}

.page-about .gaps__more {
  margin: 0;
  font-size: 14px;
  color: var(--cold);
}

.page-about .gaps__more a {
  color: var(--arc);
  text-decoration: none;
  border-bottom: 2px solid rgba(43, 231, 255, 0.35);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .gaps__more a:hover,
.page-about .gaps__more a:focus-visible {
  color: var(--lemon);
  border-bottom-color: var(--lemon);
}

/* ---------- 团队 ---------- */
.page-about .team__figure {
  margin: var(--abo-gap-md) 0 0;
}

.page-about .team-bars {
  margin-top: var(--abo-gap-md);
  display: grid;
  gap: 0;
}

.page-about .team-bar {
  padding: 18px 0 6px;
  border-top: 2px solid var(--line);
}

.page-about .team-bar__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .team-bar__name {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 18px);
  color: var(--fog);
}

.page-about .team-bar__num {
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1;
  color: var(--lemon);
}

.page-about .team-bar__track {
  margin-top: 10px;
  height: 12px;
  border: 2px solid var(--line);
  background: #0b1219;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  background: var(--arc);
  transition: filter var(--dur) var(--ease), width var(--dur) var(--ease);
}

.page-about .team-bar__fill--a { width: 100%; }
.page-about .team-bar__fill--b { width: 67%; }
.page-about .team-bar__fill--c { width: 50%; background: var(--arc-deep); }
.page-about .team-bar__fill--d { width: 17%; background: var(--lemon); }

.page-about .team-bar:hover .team-bar__fill,
.page-about .team-bar:focus-within .team-bar__fill {
  filter: brightness(1.22);
}

.page-about .team-bar__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cold);
}

/* ---------- 覆盖 ---------- */
.page-about .reach__figures {
  margin-top: var(--abo-gap-md);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  border: 2px solid var(--line);
  background: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .reach__figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--panel);
}

.page-about .reach__num {
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1;
  color: var(--lemon);
}

.page-about .reach__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--cold);
}

.page-about .reach__split {
  margin-top: var(--abo-gap-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--abo-gap-md);
}

.page-about .reach__figure-map {
  margin: 0;
}

.page-about .reach__subtitle {
  margin: 0 0 4px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  color: var(--fog);
}

.page-about .cadence {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  border-top: 2px solid var(--line);
}

.page-about .cadence li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 2px solid var(--line);
  font-size: 14.5px;
  color: var(--fog);
}

.page-about .cadence__val {
  color: var(--lemon);
  font-size: 13px;
  white-space: nowrap;
}

.page-about .region-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.page-about .region-grid span {
  display: block;
  aspect-ratio: 1 / 1;
  background: #16212b;
  border: 1px solid var(--line);
}

.page-about .region-grid span:nth-child(3n) {
  background: var(--arc-deep);
  border-color: var(--arc-deep);
}

.page-about .region-grid span:nth-child(7n + 1) {
  background: var(--arc);
  border-color: var(--arc);
}

.page-about .reach__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
}

/* ---------- 历程 ---------- */
.page-about .era__layout {
  margin-top: var(--abo-gap-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .era__index {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .era__index-link {
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--cold);
  text-decoration: none;
  border-left: 2px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .era__index-link:hover,
.page-about .era__index-link:focus-visible {
  color: var(--arc);
  border-left-color: var(--arc);
  background: rgba(43, 231, 255, 0.08);
}

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

.page-about .era__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--arc), var(--arc-deep) 42%, var(--line));
}

.page-about .era__item {
  position: relative;
  padding: 0 0 28px 32px;
}

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

.page-about .era__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--void);
  border: 2px solid var(--arc);
  box-shadow: 0 0 0 3px rgba(43, 231, 255, 0.14);
  transform: rotate(45deg);
}

.page-about .era__item--diff::before {
  border-color: var(--magenta);
  box-shadow: 0 0 0 3px rgba(255, 61, 139, 0.16);
}

.page-about .era__year {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--lemon);
}

.page-about .era__item--diff .era__year {
  color: var(--magenta);
}

.page-about .era__title {
  margin: 6px 0 8px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.45;
}

.page-about .era__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--cold);
}

.page-about .era__figure {
  margin: var(--abo-gap-md) 0 0;
}

/* ---------- 共建 ---------- */
.page-about .co-build {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--abo-gap-md);
}

.page-about .co-build__text p {
  margin: 16px 0 0;
  color: var(--cold);
  font-size: 15.5px;
}

.page-about .co-build__text p:first-of-type {
  margin-top: 20px;
}

.page-about .co-build__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  align-content: start;
  border: 2px solid var(--line);
  background: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .co-build__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--panel);
}

.page-about .co-build__stat--wide {
  grid-column: 1 / -1;
  gap: 10px;
}

.page-about .co-build__num {
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1;
  color: var(--team-mint, var(--arc));
}

.page-about .co-build__stat:first-child .co-build__num {
  color: var(--lemon);
}

.page-about .co-build__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--cold);
}

.page-about .co-build__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cold);
}

.page-about .co-build__stat--wide .btn {
  align-self: flex-start;
}

/* ---------- 下一步 ---------- */
.page-about .next__grid {
  margin-top: var(--abo-gap-md);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  color: inherit;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--arc);
  box-shadow: var(--shadow-hard);
}

.page-about .next-card__index {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--arc);
}

.page-about .next-card__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--fog);
}

.page-about .next-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cold);
}

.page-about .next-card__go {
  margin-top: 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--lemon);
}

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

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

  .page-about .region-grid {
    grid-template-columns: repeat(14, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.82fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: end;
  }

  .page-about .gaps {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 4.4vw, 56px);
    align-items: start;
  }

  .page-about .reach__split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(28px, 3.6vw, 48px);
    align-items: start;
  }

  .page-about .co-build {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: clamp(32px, 4.4vw, 56px);
    align-items: start;
  }

  .page-about .era__layout {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .era__index {
    position: sticky;
    top: 88px;
    flex-direction: column;
    gap: 2px;
    flex-wrap: nowrap;
  }

  .page-about .era__index-link {
    padding: 8px 0 8px 12px;
  }
}

@media (min-width: 1180px) {
  .page-about .team-bars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 3.6vw, 48px);
  }

  .page-about .team-bar:nth-child(1),
  .page-about .team-bar:nth-child(2) {
    padding-top: 0;
    border-top: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card,
  .page-about .team-bar__fill,
  .page-about .era__index-link,
  .page-about .gaps__more a {
    transition: none;
  }

  .page-about .next-card:hover,
  .page-about .next-card:focus-visible {
    transform: none;
  }
}
<<<END>>>