.page-about {
  --about-paper-line: rgba(11, 27, 43, 0.18);
  --about-soft: rgba(242, 245, 247, 0.06);
  background: var(--cp-ink);
  color: var(--cp-mist);
  padding-bottom: clamp(56px, 9vw, 104px);
}

.page-about a {
  color: var(--cp-jade);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  margin-top: clamp(16px, 4vw, 32px);
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  padding: clamp(22px, 4vw, 44px) 0 clamp(36px, 7vw, 84px);
  border-bottom: 1px solid var(--cp-line);
}

.page-about .about-lead__title {
  margin: 16px 0 0;
  font-family: var(--cp-font-display);
  font-size: clamp(32px, 7.4vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--cp-mist);
}

.page-about .about-lead__text {
  margin: clamp(20px, 3.4vw, 30px) 0 0;
  max-width: 34ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--cp-mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(30px, 5vw, 52px) 0 0;
  border-top: 1px solid var(--cp-line);
}

.page-about .about-stat {
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--cp-line);
}

.page-about .about-stat:nth-child(odd) {
  padding-right: 16px;
}

.page-about .about-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cp-steel);
}

.page-about .about-stat__num {
  margin: 6px 0 0;
  font-family: var(--cp-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  color: var(--cp-jade);
}

/* ---------- 分栏骨架 ---------- */
.page-about .about-block {
  border-top: 1px solid var(--cp-line);
}

.page-about .about-split {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-main {
  min-width: 0;
}

.page-about .cp-prose {
  max-width: 34ch;
  color: var(--cp-mist);
}

.page-about .about-note {
  padding-left: 14px;
  border-left: 2px solid var(--cp-sand);
}

.page-about .about-note__k {
  margin: 0 0 8px;
  font-family: var(--cp-font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cp-sand);
}

.page-about .about-note__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cp-steel);
}

.page-about .about-aside {
  display: flex;
  align-items: flex-start;
}

.page-about .about-aside .cp-cta {
  font-size: 13px;
  padding: 10px 18px;
}

/* ---------- 方法列表 ---------- */
.page-about .method-list {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--cp-line);
}

.page-about .method-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  background: var(--cp-ink);
}

.page-about .method-item__idx {
  font-family: var(--cp-font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cp-coral);
  padding-top: 3px;
}

.page-about .method-item__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cp-mist);
}

.page-about .method-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cp-steel);
}

/* ---------- 坐标图 ---------- */
.page-about .coordmap {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 18px 0 0;
  border-top: 1px dashed var(--cp-line);
  overflow-x: auto;
}

.page-about .coordmap svg {
  display: block;
  width: 100%;
  min-width: 540px;
  height: auto;
}

.page-about .coordmap figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--cp-steel);
}

/* ---------- 历程 ---------- */
.page-about .about-history__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-banner {
  margin: 0 0 clamp(30px, 5vw, 56px);
}

.page-about .about-timeline {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .tm-rail {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  scrollbar-width: none;
}

.page-about .tm-rail::-webkit-scrollbar {
  display: none;
}

.page-about .tm-rail a {
  display: block;
  flex: 0 0 auto;
  padding: 7px 12px;
  font-family: var(--cp-font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cp-steel);
  text-decoration: none;
  border: 1px solid var(--cp-line);
  border-radius: 999px;
  transition: color 0.24s var(--cp-ease), border-color 0.24s var(--cp-ease);
}

.page-about .tm-rail a:hover,
.page-about .tm-rail a:focus-visible {
  color: var(--cp-ink);
  background: var(--cp-jade);
  border-color: var(--cp-jade);
}

.page-about .tm-stack {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
  min-width: 0;
}

.page-about .tm-card {
  position: relative;
  padding: clamp(22px, 3.6vw, 34px);
  background: var(--cp-paper);
  color: var(--cp-ink);
  border: 1px solid var(--cp-ink);
  box-shadow: 7px 7px 0 0 var(--cp-ink-2);
  transition: box-shadow 0.3s var(--cp-ease), transform 0.3s var(--cp-ease);
}

.page-about .tm-card::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--about-paper-line);
  pointer-events: none;
}

.page-about .tm-card__tag {
  position: absolute;
  top: -11px;
  right: 16px;
  padding: 3px 9px;
  background: var(--cp-sand);
  color: var(--cp-ink);
  font-family: var(--cp-font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
}

.page-about .tm-card__year {
  margin: 0;
  font-family: var(--cp-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cp-jade-deep);
}

.page-about .tm-card h3 {
  margin: 12px 0 10px;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cp-ink);
}

.page-about .tm-card p:not(.tm-card__year) {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.78;
  color: #2a3a4c;
}

.page-about .tm-card:target {
  outline: 2px solid var(--cp-jade);
  outline-offset: 4px;
  transform: translateY(-3px);
}

/* ---------- 团队 ---------- */
.page-about .team-top {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-team-figure {
  margin: 0;
}

.page-about .team-intro {
  align-self: center;
}

.page-about .team-cards {
  display: grid;
  gap: 18px;
}

.page-about .team-card {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--cp-ink-2);
  border: 1px solid var(--cp-line);
  transition: border-color 0.3s var(--cp-ease), transform 0.3s var(--cp-ease);
}

.page-about .team-card:hover {
  border-color: var(--cp-jade);
  transform: translateY(-4px);
}

.page-about .team-card__num {
  margin: 0;
  font-family: var(--cp-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.6vw, 42px);
  line-height: 1;
  color: var(--cp-coral);
}

.page-about .team-card__role {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cp-mist);
}

.page-about .team-card__line {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cp-steel);
}

.page-about .team-card__reveal {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.42s var(--cp-ease), opacity 0.3s var(--cp-ease), margin-top 0.3s var(--cp-ease);
}

.page-about .team-card:hover .team-card__reveal {
  max-height: 300px;
  opacity: 1;
  margin-top: 14px;
}

.page-about .team-card__reveal p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--cp-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--cp-mist);
}

/* ---------- 协作 ---------- */
.page-about .about-eco-figure {
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .eco {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

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

.page-about .eco-list {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-about .eco-item {
  background: var(--cp-ink-2);
  border: 1px solid var(--cp-line);
  border-left: 3px solid var(--cp-coral);
}

.page-about .eco-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  color: var(--cp-mist);
}

.page-about .eco-item summary::-webkit-details-marker {
  display: none;
}

.page-about .eco-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--cp-font-mono);
  font-size: 16px;
  color: var(--cp-jade);
}

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

.page-about .eco-item__idx {
  font-family: var(--cp-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cp-sand);
}

.page-about .eco-item p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cp-steel);
}

/* ---------- 服务地区 ---------- */
.page-about .about-region {
  border-top: 1px solid var(--cp-line);
}

.page-about .about-region__inner {
  padding: clamp(26px, 4.4vw, 46px) clamp(18px, 3.4vw, 36px);
  border: 1px solid var(--cp-sand);
  background: linear-gradient(155deg, rgba(232, 196, 138, 0.1), transparent 62%);
}

.page-about .about-region__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 32px);
}

/* ---------- 图片通用 ---------- */
.page-about .cp-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .cp-figure--wide .cp-figure__media {
  aspect-ratio: 16 / 7;
  overflow: hidden;
}

.page-about .cp-figure--wide .cp-figure__img {
  height: 100%;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat {
    border-bottom: none;
    border-right: 1px solid var(--cp-line);
    padding-right: 16px;
    padding-left: 16px;
  }

  .page-about .about-stat:first-child {
    padding-left: 0;
  }

  .page-about .about-stat:last-child {
    border-right: none;
  }

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

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: 7fr 3fr 2fr;
    align-items: start;
  }

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

  .page-about .team-top {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about .team-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 20px;
  }

  .page-about .team-card:nth-child(1) {
    margin-top: 0;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 40px;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 80px;
  }

  .page-about .eco {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .tm-rail {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
    position: sticky;
    top: calc(var(--cp-head-h) + 24px);
  }

  .page-about .tm-rail a {
    border: none;
    border-left: 2px solid var(--cp-line);
    border-radius: 0;
    padding: 10px 0 10px 14px;
  }

  .page-about .tm-rail a:hover,
  .page-about .tm-rail a:focus-visible {
    background: none;
    color: var(--cp-jade);
    border-left-color: var(--cp-jade);
  }

  .page-about .tm-stack {
    gap: 40px;
  }

  .page-about .tm-card:nth-child(even) {
    margin-left: clamp(0px, 7%, 84px);
  }
}

@media (min-width: 1080px) {
  .page-about .about-lead__text,
  .page-about .cp-prose {
    font-size: 17px;
  }
}

@media (hover: none) {
  .page-about .team-card__reveal {
    max-height: none;
    opacity: 1;
    margin-top: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tm-card,
  .page-about .team-card,
  .page-about .team-card__reveal,
  .page-about .tm-rail a {
    transition-duration: 0.01ms;
  }

  .page-about .team-card:hover,
  .page-about .tm-card:target {
    transform: none;
  }
}
<<<END>>>