.page-about {
  background: var(--ink-deep);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.005em;
  margin: 10px 0 0;
  color: var(--paper);
}

.page-about .section-note {
  margin: 14px 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .section-head {
  margin-bottom: clamp(28px, 4.5vw, 52px);
}

/* ---------- 面包屑 ---------- */
.page-about .abt-crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .abt-crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .abt-crumbs a:hover,
.page-about .abt-crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-strong);
}

.page-about .abt-crumbs__sep {
  color: var(--ink-stone);
}

.page-about .abt-crumbs__now {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .abt-hero {
  position: relative;
  padding: calc(var(--head-h) + clamp(18px, 3.6vw, 44px)) 0 clamp(52px, 7vw, 96px);
  background:
    radial-gradient(115% 95% at 88% -8%, rgba(58, 209, 196, 0.15), transparent 58%),
    radial-gradient(85% 80% at -4% 12%, rgba(226, 102, 46, 0.11), transparent 62%),
    var(--ink-deep);
  overflow: hidden;
}

.page-about .abt-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(143, 163, 181, 0.07) 1px, transparent 1px);
  background-size: 140px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 68%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 68%);
  pointer-events: none;
}

.page-about .abt-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .abt-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .abt-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(36px, 6.4vw, 72px);
  line-height: 0.99;
  letter-spacing: -0.012em;
  margin: 14px 0 0;
  color: var(--paper);
}

.page-about .abt-hero__accent {
  color: var(--cyan);
  position: relative;
}

.page-about .abt-hero__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), rgba(58, 209, 196, 0));
  border-radius: 2px;
}

.page-about .abt-hero__sub {
  margin: 26px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.78);
}

.page-about .abt-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 42px);
  background: var(--line-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .abt-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 15px;
  background: var(--ink-deep);
}

.page-about .abt-stat .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .abt-stat:nth-child(2) .stat-value {
  color: var(--orange);
}

.page-about .abt-stat:nth-child(3) .stat-value {
  color: var(--paper);
}

.page-about .abt-stat:nth-child(4) .stat-value {
  color: var(--moss);
}

.page-about .abt-stat .stat-label {
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--mist);
}

.page-about .abt-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass);
  position: relative;
}

.page-about .abt-hero__media::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--cyan), var(--orange) 55%, var(--moss));
  z-index: 2;
}

.page-about .abt-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .abt-hero__media figcaption {
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 20, 32, 0.7);
}

/* ---------- 时间线 ---------- */
.page-about .abt-route {
  padding: clamp(52px, 7vw, 96px) 0 clamp(48px, 6vw, 88px);
  background: linear-gradient(180deg, var(--ink-deep) 0%, #0D1926 50%, var(--ink-deep) 100%);
}

.page-about .abt-route__head {
  margin-bottom: clamp(34px, 5vw, 60px);
}

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

.page-about .abt-tl__node {
  position: relative;
  padding-bottom: clamp(30px, 4.4vw, 52px);
}

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

.page-about .abt-tl__year {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--mist);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .abt-tl__year::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--node, var(--cyan));
  background: var(--ink-deep);
  flex: none;
}

.page-about .abt-tl__node--cyan { --node: var(--cyan); }
.page-about .abt-tl__node--orange { --node: var(--orange); }
.page-about .abt-tl__node--moss { --node: var(--moss); }
.page-about .abt-tl__node--clay { --node: var(--clay); }

.page-about .abt-tl__body {
  border-left: 2px solid var(--line-soft);
  padding-left: 18px;
  transition: border-color 180ms var(--ease);
}

.page-about .abt-tl__node:hover .abt-tl__body {
  border-left-color: var(--node, var(--cyan));
}

.page-about .abt-tl__ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 9px;
  border-radius: 3px;
  color: var(--node, var(--cyan));
  border: 1px solid currentColor;
  margin: 0 0 10px;
}

.page-about .abt-tl__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(21px, 2.8vw, 28px);
  line-height: 1.22;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .abt-tl__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.74);
}

.page-about .abt-route__fig {
  margin: 20px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .abt-route__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .abt-route__fig figcaption {
  padding: 11px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 20, 32, 0.6);
}

/* ---------- 数据链路 ---------- */
.page-about .abt-chain {
  padding: clamp(52px, 7vw, 96px) 0;
  background: var(--ink-cloud);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .abt-chain__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
  position: relative;
}

.page-about .abt-chain__step {
  --step: var(--cyan);
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(28, 39, 51, 0.72);
  display: flex;
  flex-direction: column;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .abt-chain__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--step);
}

.page-about .abt-chain__step:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: rgba(28, 39, 51, 0.9);
}

.page-about .abt-chain__step--cyan { --step: var(--cyan); }
.page-about .abt-chain__step--orange { --step: var(--orange); }
.page-about .abt-chain__step--moss { --step: var(--moss); }
.page-about .abt-chain__step--clay { --step: var(--clay); }

.page-about .abt-chain__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--step);
  margin: 0 0 10px;
}

.page-about .abt-chain__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .abt-chain__text {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 240, 232, 0.72);
  flex: 1;
}

.page-about .abt-chain__time {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .abt-chain__time b {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--step);
  font-size: 13px;
}

/* ---------- 团队 ---------- */
.page-about .abt-team {
  padding: clamp(52px, 7vw, 96px) 0;
  background: var(--ink-deep);
}

.page-about .abt-team__grid {
  gap: clamp(30px, 4.5vw, 56px);
  align-items: start;
}

.page-about .abt-team__lede .section-note {
  margin-bottom: 26px;
}

.page-about .abt-team__stack {
  display: flex;
  height: 16px;
  border-radius: 999px;
  overflow: hidden;
  background: var(--ink-stone);
  gap: 2px;
}

.page-about .abt-team__seg {
  display: block;
  width: var(--v);
  height: 100%;
  transition: filter 180ms var(--ease);
}

.page-about .abt-team__stack:hover .abt-team__seg {
  filter: brightness(1.12);
}

.page-about .abt-team__seg--cyan { background: var(--cyan); }
.page-about .abt-team__seg--orange { background: var(--orange); }
.page-about .abt-team__seg--moss { background: var(--moss); }
.page-about .abt-team__seg--clay { background: var(--clay); }

.page-about .abt-team__total {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .abt-team__total b {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
}

.page-about .abt-team__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .abt-team__role {
  --role: var(--cyan);
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--role);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--glass);
  transition: transform 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .abt-team__role:hover,
.page-about .abt-team__role:focus-visible {
  transform: translateY(-2px);
  background: var(--glass-hover);
  border-color: var(--line-strong);
  border-left-color: var(--role);
  outline: none;
}

.page-about .abt-team__role:focus-visible {
  box-shadow: 0 0 0 2px var(--ink-deep), 0 0 0 4px var(--cyan);
}

.page-about .abt-team__role--cyan { --role: var(--cyan); }
.page-about .abt-team__role--orange { --role: var(--orange); }
.page-about .abt-team__role--moss { --role: var(--moss); }
.page-about .abt-team__role--clay { --role: var(--clay); }

.page-about .abt-team__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .abt-team__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .abt-team__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--role);
  white-space: nowrap;
}

.page-about .abt-team__track {
  height: 5px;
  border-radius: 999px;
  background: rgba(143, 163, 181, 0.18);
  overflow: hidden;
  margin-bottom: 12px;
}

.page-about .abt-team__fill {
  display: block;
  width: var(--v);
  height: 100%;
  border-radius: 999px;
  background: var(--role);
}

.page-about .abt-team__duty {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(244, 240, 232, 0.7);
}

.page-about .abt-team__fig {
  margin: clamp(30px, 4.5vw, 48px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .abt-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .abt-team__fig figcaption {
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 20, 32, 0.6);
}

/* ---------- 合作 ---------- */
.page-about .abt-partners {
  padding: clamp(52px, 7vw, 96px) 0;
  background: linear-gradient(180deg, var(--ink-deep), #0D1926);
}

.page-about .abt-partners__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .abt-partner {
  --band: var(--cyan);
  padding: 24px 22px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .abt-partner::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -40px;
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: var(--band);
  opacity: 0.08;
  pointer-events: none;
}

.page-about .abt-partner:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.page-about .abt-partner--cyan { --band: var(--cyan); }
.page-about .abt-partner--orange { --band: var(--orange); }
.page-about .abt-partner--moss { --band: var(--moss); }

.page-about .abt-partner__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 42px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 0 0 4px;
  color: var(--band);
}

.page-about .abt-partner__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.3;
  margin: 0 0 12px;
  color: var(--paper);
}

.page-about .abt-partner__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 240, 232, 0.72);
}

/* ---------- V4 对比（米白阅读区） ---------- */
.page-about .abt-shift {
  padding: clamp(56px, 8vw, 108px) 0;
  background: var(--paper);
  color: var(--charcoal);
}

.page-about .abt-shift .kicker {
  color: var(--clay);
}

.page-about .abt-shift .section-title {
  color: var(--charcoal);
}

.page-about .abt-shift .section-note {
  color: #4A5460;
}

.page-about .abt-shift__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .abt-shift {
  counter-reset: shift;
}

.page-about .abt-shift__topic {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: 0.01em;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--charcoal);
  color: var(--charcoal);
  display: inline-block;
}

.page-about .abt-shift__pair {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .abt-shift__side {
  padding: 16px 18px;
  border-radius: var(--radius);
  background: #EDE8DE;
  border: 1px solid #DAD3C6;
}

.page-about .abt-shift__side--after {
  background: #FBFAF6;
  border-color: var(--cyan);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-about .abt-shift__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border-radius: 3px;
  margin-bottom: 10px;
  background: #D9D2C4;
  color: #4A5460;
}

.page-about .abt-shift__side--after .abt-shift__tag {
  background: var(--charcoal);
  color: var(--cyan);
}

.page-about .abt-shift__side p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #2C343C;
}

.page-about .abt-shift__side--before p {
  color: #5B6470;
}

.page-about .abt-shift__foot {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-top: 20px;
  border-top: 1px solid #DAD3C6;
  font-size: 14.5px;
  line-height: 1.85;
  color: #4A5460;
}

.page-about .abt-shift__foot a {
  color: #1F6F68;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 160ms var(--ease);
}

.page-about .abt-shift__foot a:hover,
.page-about .abt-shift__foot a:focus-visible {
  color: var(--clay);
}

/* ---------- 下一步 ---------- */
.page-about .abt-next {
  padding: clamp(48px, 6.5vw, 88px) 0 clamp(56px, 8vw, 100px);
  background: var(--ink-deep);
}

.page-about .abt-next__panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(58, 209, 196, 0.12), transparent 62%),
    var(--glass);
  padding: clamp(24px, 4vw, 44px);
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .abt-next__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.12;
  margin: 10px 0 0;
  color: var(--paper);
}

.page-about .abt-next__text {
  margin: 12px 0 0;
  max-width: 40ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-about .abt-next__link {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  text-decoration: none;
  background: rgba(10, 20, 32, 0.45);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .abt-next__link:hover,
.page-about .abt-next__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: rgba(10, 20, 32, 0.78);
  outline: none;
}

.page-about .abt-next__link:focus-visible {
  box-shadow: 0 0 0 2px var(--ink-deep), 0 0 0 4px var(--cyan);
}

.page-about .abt-next__link-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  color: var(--paper);
}

.page-about .abt-next__link-desc {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .abt-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .abt-partners__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .abt-chain__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .abt-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }

  .page-about .abt-tl__node {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 0 26px;
  }

  .page-about .abt-tl__year {
    justify-content: flex-end;
    margin: 6px 0 0;
    padding-right: 4px;
  }

  .page-about .abt-tl__year::before {
    order: 2;
    margin-left: 8px;
  }

  .page-about .abt-tl__body {
    padding-left: 26px;
  }

  .page-about .abt-tl::before {
    content: "";
    position: absolute;
    left: 108px;
    top: 14px;
    bottom: 24px;
    width: 1px;
    background: linear-gradient(180deg, var(--line-strong), var(--line) 60%, transparent);
    transform: translateX(13px);
  }

  .page-about .abt-route__fig {
    max-width: 620px;
  }

  .page-about .abt-chain__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .abt-chain__list::before {
    content: "";
    position: absolute;
    top: -18px;
    left: 6%;
    right: 6%;
    height: 1px;
    background: repeating-linear-gradient(90deg, var(--line-strong) 0 8px, transparent 8px 16px);
  }

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

  .page-about .abt-shift__pair {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    position: relative;
  }

  .page-about .abt-shift__pair::after {
    content: "→";
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-mono);
    font-size: 15px;
    color: var(--clay);
    background: var(--paper);
    padding: 0 4px;
    line-height: 1;
    z-index: 2;
  }

  .page-about .abt-next__panel {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: start;
  }
}

@media (min-width: 1140px) {
  .page-about .abt-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .abt-chain__step,
  .page-about .abt-team__role,
  .page-about .abt-partner,
  .page-about .abt-next__link,
  .page-about .abt-tl__body,
  .page-about .abt-team__seg {
    transition: none;
  }

  .page-about .abt-chain__step:hover,
  .page-about .abt-team__role:hover,
  .page-about .abt-partner:hover,
  .page-about .abt-next__link:hover {
    transform: none;
  }
}
<<<END>>>

请确认以上内容准确无误。

.page-about {
  --v: 1rem;
}