.page-about {
  --about-col: 96px;
  --about-gap: clamp(16px, 3vw, 44px);
  --about-body: rgba(244, 246, 250, 0.8);
  --about-dim: rgba(140, 154, 181, 0.92);
  overflow-x: clip;
  display: block;
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .about-top {
  padding-block: clamp(22px, 4vw, 46px) clamp(18px, 3vw, 32px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(24px, 4vw, 44px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: rgba(0, 229, 208, 0.55);
}

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

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-about .about-hero {
  position: relative;
  max-width: 920px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 6.6vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.005em;
  margin: 0 0 clamp(14px, 2.2vw, 24px);
  color: var(--paper);
  max-width: 17ch;
}

.page-about .about-hero__lede {
  max-width: 58ch;
  color: var(--about-body);
  margin: 0;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.15rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__k {
  font-size: 0.76rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--about-dim);
}

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

/* ---------- 章节横向轨道 ---------- */
.page-about .about-linewrap {
  margin-bottom: clamp(10px, 2vw, 22px);
}

.page-about .about-line {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-line__item {
  flex: 0 0 auto;
  min-width: 124px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 0 4px;
  border-top: 2px solid var(--line);
  text-decoration: none;
  scroll-snap-align: start;
  transition: border-color 200ms var(--ease);
}

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

.page-about .about-line__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-line__lb {
  font-size: 0.88rem;
  color: var(--paper);
  white-space: nowrap;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-step {
  padding-block: clamp(44px, 6vw, 88px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 84px;
  transition: background 320ms var(--ease);
}

.page-about .about-step:target {
  background: linear-gradient(180deg, rgba(0, 229, 208, 0.05), rgba(0, 229, 208, 0) 62%);
}

.page-about .about-step__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2.4vw, 26px);
}

.page-about .about-step__mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 14px;
  border-left: 2px solid rgba(0, 229, 208, 0.28);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-step__lb {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-dim);
  white-space: nowrap;
}

.page-about .about-step__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.42rem, 3.6vw, 2.3rem);
  line-height: 1.26;
  margin: 0 0 clamp(14px, 2vw, 22px);
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-step__lead {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  line-height: 1.88;
  color: var(--about-body);
  max-width: 62ch;
  margin: 0 0 clamp(18px, 2.6vw, 30px);
}

.page-about .about-step__body p {
  font-size: clamp(0.93rem, 1.35vw, 1.02rem);
  line-height: 1.92;
  color: var(--about-body);
  margin: 0 0 1.05em;
  max-width: 62ch;
}

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

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 38px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-step__grid {
    grid-template-columns: var(--about-col) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-step__mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  }
}

/* ---------- 旁注玻璃卡 ---------- */
.page-about .about-note {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.page-about .about-note__k {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

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

.page-about .about-note__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.87rem;
  line-height: 1.72;
  color: var(--about-body);
}

.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-team__media {
  border-radius: 3px;
}

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

.page-about .about-team__cap {
  margin: 12px 0 0;
  font-size: 0.82rem;
  line-height: 1.72;
  color: var(--about-dim);
  max-width: 58ch;
}

.page-about .about-crew {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  padding: 4px 0 18px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

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

.page-about .about-crew__card {
  flex: 0 0 min(78%, 300px);
  scroll-snap-align: start;
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--ink-1);
  border-top: 2px solid var(--cyan);
  border-radius: 3px;
}

.page-about .about-crew__idx {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .about-crew__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: 0.02em;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .about-crew__desc {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--about-body);
}

@media (min-width: 900px) {
  .page-about .about-crew__card {
    flex: 0 0 272px;
  }
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-flow__no {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-flow__h {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-flow__txt p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.86;
  color: var(--about-body);
  max-width: 60ch;
}

@media (min-width: 900px) {
  .page-about .about-flow__row {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 22px;
  }
}

/* ---------- 城市专栏 ---------- */
.page-about .about-city {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .about-city__media {
  border-radius: 3px;
}

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

.page-about .about-mapwrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.page-about .about-map {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-map__edge path {
  fill: none;
  stroke: rgba(0, 229, 208, 0.34);
  stroke-width: 1.2;
  stroke-dasharray: 4 5;
}

.page-about .about-map__node circle {
  fill: var(--cyan-soft);
}

.page-about .about-map .about-map__hub {
  fill: var(--orange);
}

.page-about .about-map__label text {
  fill: var(--slate);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .about-mapwrap__cap {
  margin: 14px 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--about-dim);
}

.page-about .about-city__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 3px;
  overflow: hidden;
}

.page-about .about-city__facts li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--ink-0);
  min-width: 0;
}

.page-about .about-city__facts b {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 2.8vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-city__facts span {
  font-size: 0.8rem;
  line-height: 1.62;
  color: var(--about-dim);
}

@media (min-width: 860px) {
  .page-about .about-city {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: stretch;
  }
}

/* ---------- 版本演进 ---------- */
.page-about .about-ver {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .about-ver__card {
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: 3px;
  min-width: 0;
}

.page-about .about-ver__card--now {
  border-color: rgba(0, 229, 208, 0.34);
  background: linear-gradient(158deg, rgba(0, 229, 208, 0.09), rgba(11, 22, 48, 1) 58%);
}

.page-about .about-ver__code {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4.8vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .about-ver__card:not(.about-ver__card--now) .about-ver__code {
  color: var(--slate);
}

.page-about .about-ver__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--about-dim);
  margin: 0 0 16px;
}

.page-about .about-ver__list {
  margin: 0;
  padding: 0 0 0 16px;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-ver__list li {
  position: relative;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .about-ver__list li::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 0.66em;
  width: 7px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-ver__media {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
  align-items: center;
}

.page-about .about-ver__figure {
  border-radius: 3px;
}

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

.page-about .about-ver__noteK {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .about-ver__noteTxt {
  margin: 0 0 14px;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--about-body);
  max-width: 46ch;
}

.page-about .about-ver__link {
  font-size: 0.88rem;
}

@media (min-width: 760px) {
  .page-about .about-ver {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-ver__media {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  }
}

/* ---------- 长期坚持 ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-rules li {
  padding: clamp(18px, 2.4vw, 24px);
  background: var(--ink-1);
  border-left: 2px solid var(--cyan);
  border-radius: 0 3px 3px 0;
}

.page-about .about-rules h3 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-rules p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.82;
  color: var(--about-body);
}

@media (min-width: 760px) {
  .page-about .about-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding-block: clamp(38px, 5vw, 66px);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(18, 34, 74, 0.62), rgba(5, 11, 24, 0) 100%);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
}

.page-about .about-next__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.9vw, 1.95rem);
  line-height: 1.3;
  color: var(--paper);
  margin: 8px 0 12px;
}

.page-about .about-next__txt {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.88;
  color: var(--about-body);
  max-width: 58ch;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line__item,
  .page-about .about-step {
    transition: none;
  }
}
<<<END>>>