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

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

.page-about .about-crumbs {
  padding-top: clamp(14px, 2.4vw, 26px);
}

.page-about .about-chapter {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  padding: clamp(20px, 3.5vw, 40px) 0 clamp(34px, 5vw, 64px);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(36px, 8vw, 92px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-hero__title span {
  display: block;
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-facts {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(14px, 2vw, 22px);
  background: var(--ink-2);
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-facts__label {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---- 通用区块 ---- */
.page-about .about-block {
  padding: clamp(40px, 6vw, 80px) 0;
}

.page-about .about-block--panel {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-block--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(26px, 4.4vw, 50px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-block--paper .about-h2 {
  color: var(--ink);
}

.page-about .about-p {
  margin: 16px 0 0;
  max-width: 70ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-block--paper .about-p {
  color: #24382F;
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
}

.page-about .about-band {
  height: 4px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--signal) 58%, var(--gold) 100%);
}

/* ---- 起点要点 ---- */
.page-about .about-points {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 11px;
  height: 1px;
  background: var(--signal);
}

.page-about .about-points strong {
  color: var(--white);
  font-weight: 600;
}

/* ---- 里程碑 ---- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  text-decoration: none;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--cyan);
  background: rgba(77, 245, 210, 0.1);
}

.page-about .about-figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 10px;
}

.page-about .figure-frame__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-timeline {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-node {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 42px) 24px;
  border-left: 1px solid var(--line);
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 11px;
  width: 9px;
  height: 9px;
  background: var(--gold);
}

.page-about .about-node--live::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(77, 245, 210, 0.16);
}

.page-about .about-node__meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.page-about .about-node__year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.6vw, 34px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-node__tag {
  padding: 3px 9px;
  border: 1px solid rgba(216, 166, 87, 0.45);
  border-radius: 999px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .about-node--live .about-node__tag {
  border-color: rgba(77, 245, 210, 0.55);
  color: var(--cyan);
}

.page-about .about-node__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.25;
  color: var(--white);
}

.page-about .about-node--live .about-node__title {
  color: var(--cyan);
}

.page-about .about-node__body p {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: clamp(14px, 1.45vw, 16.5px);
  line-height: 1.85;
  color: var(--paper);
}

/* ---- 折叠研究板 ---- */
.page-about .about-expand {
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-expand .expand-item {
  border-top: 1px solid var(--line);
}

.page-about .about-expand .expand-panel p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---- 团队 ---- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid rgba(7, 28, 22, 0.28);
  background: rgba(7, 28, 22, 0.06);
  padding: 10px;
}

.page-about .about-block--paper .figure-frame__caption {
  color: #3D5148;
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(7, 28, 22, 0.24);
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(7, 28, 22, 0.16);
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 34px);
  line-height: 1;
  color: var(--ink-2);
}

.page-about .about-role__name {
  align-self: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 22px);
  color: var(--ink);
}

.page-about .about-role__desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #33473F;
}

/* ---- 协作网络 ---- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-network__stats {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-network__stats li {
  padding: 16px 18px;
  background: var(--ink);
}

.page-about .about-network__stats span {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1;
  color: var(--signal);
}

.page-about .about-network__stats small {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-network__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 10px;
}

/* ---- 服务标准 ---- */
.page-about .about-standards__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-standard {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-standard__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-about .about-standard h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--white);
}

.page-about .about-standard p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-standard .mono {
  color: var(--cyan);
  word-break: break-word;
}

/* ---- 路线 ---- */
.page-about .about-roadmap {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-roadmap li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-roadmap__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-roadmap h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--white);
}

.page-about .about-roadmap p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 4vw, 40px);
}

/* ---- 响应式 ---- */
@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-role {
    grid-template-columns: 72px 176px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-about .about-role__desc {
    grid-column: 3;
    margin: 0;
  }

  .page-about .about-roadmap li {
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 24px;
    align-items: start;
  }

  .page-about .about-roadmap__num {
    grid-row: 1 / span 2;
    padding-top: 5px;
  }
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(28px, 5vw, 72px);
  }

  .page-about .about-node {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: clamp(24px, 3.5vw, 48px);
    padding-left: 32px;
    align-items: start;
  }

  .page-about .about-node__year {
    font-size: clamp(30px, 3.6vw, 42px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

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