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

.page-about .ab-topline {
  padding-top: clamp(14px, 3vw, 24px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(20px, 4vw, 40px) 0 clamp(36px, 6vw, 68px);
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-about .ab-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .ab-hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  max-width: 16em;
}

.page-about .ab-hero-copy .lead {
  margin-top: 18px;
  max-width: 34em;
  color: var(--ink);
  opacity: .82;
}

.page-about .ab-hero-copy .btn-row {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero-card {
  position: relative;
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--radius);
  padding: 26px 24px 22px;
  box-shadow: 6px 6px 0 var(--arch);
}

.page-about .ab-hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 6px;
  background: var(--pass);
}

.page-about .ab-card-label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--pass);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--on-dark-line);
}

.page-about .ab-facts li:last-child {
  border-bottom: 0;
}

.page-about .ab-fact-num {
  font-family: var(--font-num);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  color: var(--pass);
  min-width: 4.4em;
  letter-spacing: -0.01em;
}

.page-about .ab-fact-txt {
  font-size: 14px;
  color: var(--on-dark);
}

.page-about .ab-card-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark);
  opacity: .74;
  border-top: 1px solid var(--on-dark-line);
  padding-top: 14px;
}

@media (min-width: 900px) {
  .page-about .ab-hero-inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, .85fr);
    align-items: center;
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .ab-layout {
  display: block;
  padding-bottom: clamp(48px, 8vw, 96px);
}

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

.page-about .ab-content {
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-about .ab-layout {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .toc-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 22px);
    align-self: start;
    padding-top: clamp(48px, 6vw, 76px);
  }

  .page-about .toc-rail::before {
    content: "";
    display: block;
    width: 34px;
    height: 3px;
    background: var(--pass);
    margin-bottom: 14px;
  }
}

/* ---------- 章节头 ---------- */
.page-about .ab-section {
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 4vw, 44px);
}

.page-about .ab-section:first-child {
  border-top: 0;
  padding-top: clamp(36px, 5vw, 64px);
}

.page-about .ab-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: start;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .ab-head .section-num {
  font-family: var(--font-num);
  font-size: clamp(38px, 7vw, 78px);
  font-weight: 700;
  line-height: .9;
  color: var(--arch);
  letter-spacing: -0.04em;
}

.page-about .ab-head-body {
  min-width: 0;
  border-left: 1px solid var(--line);
  padding-left: 16px;
}

.page-about .ab-head .section-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .ab-head .section-desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 通用图文 ---------- */
.page-about .ab-figure {
  margin: 0;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  filter: saturate(.82) contrast(1.04);
}

.page-about .ab-figure .figure-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
}

@media (min-width: 820px) {
  .page-about .split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .split--flip {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }
}

.page-about .ab-origin-text p,
.page-about .ab-team-text p {
  margin: 0 0 16px;
  line-height: 1.8;
}

.page-about .ab-origin-text p:last-child,
.page-about .ab-team-text p:last-child {
  margin-bottom: 0;
}

.page-about .ab-inline-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-inline-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .ab-inline-list .key {
  flex: none;
  color: var(--pass);
  font-weight: 700;
  min-width: 4.6em;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 46px;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--line-strong) 0 6px, transparent 6px 13px);
}

.page-about .ab-node {
  position: relative;
  padding-bottom: clamp(26px, 3.4vw, 40px);
}

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

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -46px;
  top: 2px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--pass);
  box-sizing: border-box;
}

.page-about .ab-node:first-child::before {
  background: var(--pass);
  box-shadow: inset 0 0 0 6px var(--paper);
}

.page-about .ab-year {
  display: inline-block;
  font-family: var(--font-num);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink);
  padding-bottom: 4px;
  border-bottom: 3px solid var(--amber);
}

.page-about .ab-node-title {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .ab-node p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  opacity: .82;
}

/* ---------- 服务清单 ---------- */
.page-about .ab-services {
  list-style: none;
  margin: 0 0 clamp(24px, 3vw, 38px);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-service {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  background: var(--paper);
  padding: 14px 16px;
}

.page-about .ab-service-num {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--pass);
}

.page-about .ab-service-name {
  font-weight: 700;
  font-size: 15px;
}

.page-about .ab-service-note {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

@media (min-width: 720px) {
  .page-about .ab-services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 场景卡 ---------- */
.page-about .ab-scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-scene {
  padding: 22px 20px;
}

.page-about .ab-scenes .ab-scene:nth-child(2) {
  border-top: 3px solid var(--pass);
}

.page-about .ab-scenes .ab-scene:nth-child(3) {
  border-top: 3px solid var(--amber);
}

.page-about .ab-scene-title {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .ab-scene p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  opacity: .84;
}

.page-about .ab-scene a {
  color: var(--deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--pass);
}

@media (min-width: 720px) {
  .page-about .ab-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  margin-bottom: clamp(26px, 3.4vw, 40px);
}

.page-about .ab-team-accordion {
  margin-bottom: clamp(28px, 3.4vw, 44px);
}

.page-about .ab-coop {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--mist);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-card);
}

.page-about .ab-coop-title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(28, 28, 28, .16);
}

.page-about .ab-coop-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-coop-list li {
  display: grid;
  grid-template-columns: minmax(56px, auto) minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-about .ab-coop-num {
  font-family: var(--font-num);
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  color: var(--deep);
  letter-spacing: -0.02em;
}

.page-about .ab-coop-txt {
  font-size: 14px;
  line-height: 1.75;
}

@media (min-width: 720px) {
  .page-about .ab-coop-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 28px;
  }
}

/* ---------- 荣誉 ---------- */
.page-about .ab-honor {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
  margin-bottom: clamp(28px, 4vw, 46px);
}

@media (min-width: 820px) {
  .page-about .ab-honor {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

.page-about .ab-award {
  display: inline-block;
  margin-bottom: 14px;
}

.page-about .ab-award-title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-about .ab-honor-main p {
  margin: 0 0 14px;
  line-height: 1.8;
  opacity: .84;
}

.page-about .ab-honor-main p:last-child {
  margin-bottom: 0;
}

/* ---------- 行动区 ---------- */
.page-about .ab-cta {
  background: var(--deep);
  color: var(--on-dark);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 40px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.page-about .ab-cta::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 150px;
  height: 150px;
  border: 2px dashed rgba(247, 244, 236, .22);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .ab-cta-title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .ab-cta-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  max-width: 44em;
}

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

@media (min-width: 860px) {
  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .9fr);
  }

  .page-about .ab-cta-actions {
    justify-content: flex-end;
  }
}
<<<END>>>