.page-about {
  --about-gutter: clamp(20px, 4vw, 56px);
  --about-radius: 0;
}

/* ---------- 面包屑位于共享容器中，仅微调间距 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(16px, 2.4vw, 28px);
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 48px) 0 clamp(40px, 6vw, 88px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero__mark {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .about-hero__rotate {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1;
  color: var(--moss);
  padding-bottom: 4px;
}

.page-about .about-hero .display {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.page-about .about-hero .lede {
  max-width: 46ch;
  color: var(--ink);
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  border: var(--line);
}

.page-about .about-hero__figure .figure-cap {
  margin-top: 10px;
  font-size: 13px;
  color: var(--gray);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 5vw, 88px);
  }
}

/* ---------- 主张 ---------- */
.page-about .about-claim__grid {
  row-gap: clamp(24px, 3.4vw, 40px);
}

.page-about .about-claim__aside .h2 {
  margin: 6px 0 16px;
}

.page-about .about-claim__quote {
  font-size: 15px;
  line-height: 1.8;
  color: var(--moss);
  border-left: 2px solid var(--moss);
  padding-left: 14px;
  margin: 0;
}

.page-about .about-claim__body p {
  font-size: 17px;
  line-height: 1.85;
  margin: 0 0 1em;
  color: var(--ink);
  max-width: 62ch;
}

.page-about .about-claim__body p:last-of-type {
  margin-bottom: 1.4em;
}

@media (min-width: 900px) {
  .page-about .about-claim__aside {
    position: sticky;
    top: 100px;
    align-self: start;
  }
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline__head {
  max-width: 56ch;
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .about-timeline__head .h2 {
  margin: 6px 0 12px;
}

.page-about .about-timeline__figure {
  margin: 0 0 clamp(32px, 5vw, 56px);
  position: relative;
  background: var(--paper-2);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  border: var(--line);
}

.page-about .about-timeline__figure .figure-cap {
  margin-top: 10px;
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  background-image:
    repeating-linear-gradient(90deg, rgba(43, 76, 126, 0.05) 0 1px, transparent 1px 28px);
  background-size: auto 100%;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(28px, 3.4vw, 40px) 28px;
  border-left: 1px solid var(--silver);
}

.page-about .timeline__item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .timeline__node {
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--moss);
  border: 1px solid var(--paper);
  transition: transform 180ms var(--ease), background-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .timeline__item:hover .timeline__node,
.page-about .timeline__item:focus-within .timeline__node {
  transform: scale(1.5);
  background: var(--cinnabar);
  box-shadow: 0 0 0 4px rgba(208, 98, 58, 0.14);
}

.page-about .timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--moss);
  margin-bottom: 6px;
}

.page-about .timeline__title {
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  line-height: 1.35;
}

.page-about .timeline__body p {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.8;
  max-width: 60ch;
}

.page-about .timeline__extra {
  font-size: 14px;
  color: var(--gray);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-about .about-timeline__foot {
  margin-top: clamp(24px, 3vw, 36px);
  font-size: 15px;
}

@media (min-width: 760px) {
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 76px 1fr;
    column-gap: 24px;
    padding-left: 32px;
    align-items: start;
  }
  .page-about .timeline__year {
    text-align: right;
    margin-bottom: 0;
    padding-top: 4px;
  }
  .page-about .timeline__body {
    grid-column: 2;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__head {
  row-gap: clamp(24px, 3.4vw, 40px);
  margin-bottom: clamp(32px, 5vw, 56px);
  align-items: end;
}

.page-about .about-team__head .h2 {
  margin: 6px 0 14px;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  border: var(--line);
}

.page-about .about-team__figure .figure-cap {
  margin-top: 10px;
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 24px);
}

.page-about .team-card {
  background: var(--paper);
  border: var(--line);
  padding: clamp(20px, 2.6vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--moss);
}

.page-about .team-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--silver);
}

.page-about .team-card__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--indigo);
}

.page-about .team-card__count {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.page-about .team-card .h3 {
  margin: 4px 0 0;
}

.page-about .team-card > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .team-card__details {
  margin-top: 4px;
  border-top: 1px dashed var(--silver);
  padding-top: 10px;
}

.page-about .team-card__details summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--moss);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  list-style: none;
}

.page-about .team-card__details summary::-webkit-details-marker {
  display: none;
}

.page-about .team-card__details summary::after {
  content: " +";
  font-family: var(--font-mono);
}

.page-about .team-card__details[open] summary::after {
  content: " −";
}

.page-about .team-card__details ul {
  margin: 10px 0 0;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--gray);
}

@media (min-width: 860px) {
  .page-about .team-grid {
    grid-template-columns: 1fr 1.1fr 1fr;
    align-items: start;
  }
  .page-about .team-card--raise {
    margin-top: -24px;
  }
}

/* ---------- 本地网络 ---------- */
.page-about .about-network__grid {
  row-gap: clamp(24px, 3.4vw, 40px);
}

.page-about .about-network__aside .h2 {
  margin: 6px 0 0;
}

.page-about .about-network__body p {
  margin: 0 0 1em;
  font-size: 17px;
  line-height: 1.85;
  max-width: 62ch;
}

.page-about .city-band {
  display: grid;
  gap: 1px;
  background: var(--silver);
  border: var(--line);
  margin: clamp(20px, 3vw, 32px) 0;
}

.page-about .city-band__item {
  background: var(--paper);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .city-band__name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .city-band__note {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.page-about .about-network__foot {
  margin: 0;
  font-size: 15px;
}

@media (min-width: 640px) {
  .page-about .city-band {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partners {
  background: var(--deep);
  color: var(--paper);
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-about .about-partners .eyebrow {
  color: var(--silver);
}

.page-about .about-partners__grid {
  row-gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .about-partners .h2 {
  color: var(--paper);
  margin: 6px 0 18px;
}

.page-about .about-partners__lede {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(246, 242, 234, 0.82);
  margin: 0;
  max-width: 52ch;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(201, 214, 227, 0.24);
}

.page-about .about-partners__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 18px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid rgba(201, 214, 227, 0.24);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cinnabar);
  line-height: 1;
}

.page-about .about-partners__label {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(246, 242, 234, 0.9);
}

.page-about .about-partners__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(32px, 5vw, 56px) 0 0;
}

.page-about .about-partners__foot .btn {
  text-decoration: none;
}

/* ---------- 通用窄屏防溢出 ---------- */
.page-about img,
.page-about svg {
  max-width: 100%;
}

.page-about .grid {
  min-width: 0;
}
<<<END>>>