.page-about {
  --about-fig: clamp(26px, 3.4vw, 36px);
  --about-prose: rgba(244, 239, 230, 0.76);
  --about-prose-soft: rgba(244, 239, 230, 0.68);
  color: var(--ivory);
}

.page-about .about-hero {
  padding: clamp(18px, 3vw, 34px) 0 clamp(38px, 5.5vw, 72px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

.page-about .about-h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.4vw, 70px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  color: var(--ivory);
  margin: 12px 0 18px;
  font-weight: 700;
}

.page-about .about-lead {
  max-width: 50ch;
  color: var(--about-prose);
  margin: 0;
}

.page-about .about-figures {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 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);
}

.page-about .about-figures li {
  background: var(--ink-900);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 82px;
  justify-content: flex-end;
}

.page-about .fig-num {
  font-size: var(--about-fig);
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: 0.01em;
}

.page-about .fig-key {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--slate);
  letter-spacing: 0.03em;
}

.page-about .about-hero-media {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-about .about-hero-media::before,
.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 1px solid var(--gold);
  pointer-events: none;
}

.page-about .about-hero-media::before {
  top: 10px;
  left: 10px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero-media::after {
  right: 10px;
  bottom: 10px;
  border-top: 0;
  border-left: 0;
}

/* 正文骨架 */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 44px);
  padding-bottom: clamp(46px, 6vw, 88px);
  align-items: start;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail-label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--slate);
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line-soft);
}

.page-about .about-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--slate);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-rail-link .mono {
  font-size: 11px;
  color: var(--copper);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--ivory);
  border-left-color: var(--gold);
  outline: none;
}

.page-about .about-rail-link[aria-current] {
  color: var(--gold-bright);
  border-left-color: var(--gold-bright);
}

/* 章节 */
.page-about .about-chapter {
  padding-top: clamp(30px, 4.5vw, 54px);
  margin-top: clamp(30px, 4.5vw, 54px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-chapter:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-about .about-chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: clamp(16px, 2.4vw, 22px);
}

.page-about .about-chapter-num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  padding: 4px 9px;
  border: 1px solid var(--line-strong);
  line-height: 1;
}

.page-about .about-chapter-title {
  font-family: var(--font-display);
  font-size: clamp(21px, 2.9vw, 33px);
  line-height: 1.22;
  letter-spacing: -0.012em;
  font-weight: 600;
  color: var(--ivory);
  margin: 0;
}

.page-about .about-prose,
.page-about .about-prose-intro {
  max-width: 64ch;
}

.page-about .about-prose p,
.page-about .about-prose-intro {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-prose);
}

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

/* 五级坐标 */
.page-about .about-layers {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 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);
}

.page-about .about-layers li {
  background: var(--ink-900);
  padding: 14px 14px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  color: var(--ivory);
}

.page-about .about-layers li .mono {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.12em;
}

/* 时间线 */
.page-about .about-timeline-media {
  margin: 0 0 clamp(20px, 3vw, 28px);
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-about .about-timeline-media .media-caption {
  display: block;
  padding: 10px 14px;
  font-size: 12.5px;
  color: var(--slate);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-scale-wrap {
  margin-bottom: clamp(20px, 3vw, 26px);
}

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

.page-about .about-scale li {
  display: flex;
}

.page-about .about-scale-node {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 100%;
  padding: 13px 12px 14px;
  background: var(--ink-900);
  text-decoration: none;
  color: var(--slate);
  border-bottom: 2px solid transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .about-scale-year {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--gold-bright);
}

.page-about .about-scale-name {
  font-size: 12.5px;
  line-height: 1.45;
}

.page-about .about-scale-node:hover,
.page-about .about-scale-node:focus-visible {
  background: var(--ink-800);
  color: var(--ivory);
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-about .about-scale-node:focus-visible {
  box-shadow: 0 0 0 2px var(--gold-bright) inset;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-tl-item {
  background: var(--ink-900);
  padding: 18px 16px 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-tl-item:target {
  background: var(--ink-800);
  box-shadow: inset 2px 0 0 var(--gold);
}

.page-about .about-tl-year {
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
  margin: 0;
  line-height: 1.2;
}

.page-about .about-tl-body h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ivory);
  line-height: 1.4;
}

.page-about .about-tl-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-prose-soft);
}

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-team-media {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-about .about-team-media .media-caption {
  display: block;
  padding: 10px 14px;
  font-size: 12.5px;
  color: var(--slate);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-team-item {
  background: var(--ink-900);
  padding: 16px 16px 18px;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-about .about-team-count {
  font-size: 24px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
  padding-top: 2px;
}

.page-about .about-team-item h3 {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ivory);
}

.page-about .about-team-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--about-prose-soft);
}

.page-about .about-service-band {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-service-cell {
  background: linear-gradient(180deg, rgba(19, 42, 66, 0.85), rgba(7, 17, 31, 0.95));
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-service-cell .mono {
  font-size: 22px;
  line-height: 1.1;
  color: var(--gold-bright);
  letter-spacing: 0.03em;
}

.page-about .about-service-cell p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-prose-soft);
}

/* 覆盖 */
.page-about .about-reach-grid {
  margin: clamp(18px, 2.6vw, 26px) 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-reach-cell {
  background: var(--ink-900);
  padding: 16px 14px 18px;
}

.page-about .reach-num {
  display: block;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .about-reach-cell p {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-regions {
  border: 1px solid var(--line);
  padding: 16px 16px 18px;
  background: linear-gradient(120deg, rgba(90, 107, 98, 0.16), rgba(7, 17, 31, 0) 68%);
}

.page-about .about-regions-label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--moss);
}

.page-about .about-region-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-region-list li {
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  font-size: 13.5px;
  color: var(--ivory);
  background: rgba(214, 168, 90, 0.06);
}

/* 生态 */
.page-about .about-coop {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-coop li {
  background: var(--ink-900);
  padding: 16px 16px 18px;
}

.page-about .about-coop li .mono {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--copper);
  border: 1px solid rgba(183, 116, 74, 0.55);
  padding: 3px 9px;
  margin-bottom: 9px;
}

.page-about .about-coop li p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-prose-soft);
}

.page-about .about-honors {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-honors li {
  background: var(--bg-inset);
  padding: 14px 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
}

.page-about .about-honors .mono {
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
}

.page-about .about-honors p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ivory);
}

/* 三端衔接 */
.page-about .about-chain {
  margin-top: clamp(18px, 2.6vw, 26px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-link-card {
  background: var(--ink-900);
  padding: 22px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
}

.page-about .about-link-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-link-card .mono {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--copper);
}

.page-about .about-link-card h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.4;
  font-weight: 600;
  color: var(--ivory);
}

.page-about .about-link-card p {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-prose-soft);
}

.page-about .about-link-card p .mono {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border: 0;
}

.page-about .about-link-card .link-arrow {
  align-self: flex-start;
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-link-card .link-arrow:hover,
.page-about .about-link-card .link-arrow:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
  outline: none;
}

/* 结尾行动区 */
.page-about .about-cta {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(19, 42, 66, 0.55), rgba(7, 17, 31, 0));
}

.page-about .about-cta-inner {
  padding: clamp(34px, 5vw, 62px) 0;
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-cta-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.012em;
  color: var(--ivory);
  margin: 10px 0 12px;
  font-weight: 600;
}

.page-about .about-cta-copy p:last-child {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-prose-soft);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* 媒体查询 */
@media (min-width: 620px) {
  .page-about .about-service-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-honors li {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
  }
}

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

  .page-about .about-layers {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-scale {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-tl-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 22px;
    padding: 22px 24px 24px;
    align-items: baseline;
  }

  .page-about .about-reach-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-cta-inner {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }

  .page-about .about-cta-actions {
    flex-shrink: 0;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1fr);
  }

  .page-about .about-team-media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: 188px minmax(0, 1fr);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}
<<<END>>>