.page-about {
  --ab-line: 1px solid var(--hairline);
  --ab-goldline: 1px solid var(--line-gold);
  background: var(--snow);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  margin-bottom: 26px;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--grey);
}

.page-about .breadcrumb-link {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--ochre);
  border-bottom-color: var(--line-gold);
}

.page-about .breadcrumb-current {
  color: var(--ink);
}

.page-about .breadcrumb-sep {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: 26px 0 0;
  border-bottom: var(--ab-line);
}

.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-hero-copy h1 {
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .ab-hero-copy .lede {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .ab-hero-actions .btn {
  min-width: 0;
}

/* 框景图块 */
.page-about .ab-figure {
  position: relative;
  margin: 0;
  padding: 10px;
  border: var(--ab-goldline);
  background: var(--white);
}

.page-about .ab-figure::before,
.page-about .ab-figure::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  pointer-events: none;
}

.page-about .ab-figure::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
}

.page-about .ab-figure::after {
  right: -1px;
  bottom: -1px;
  border-right: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.03);
}

.page-about .ab-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--grey);
}

.page-about .ab-figure-id {
  position: absolute;
  left: 18px;
  bottom: 18px;
  margin: 0;
  padding: 5px 10px;
  background: var(--ink-green);
  color: var(--gold);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

/* 首屏数据条 */
.page-about .ab-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--ab-line);
}

.page-about .ab-strip-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0 20px;
  border-bottom: var(--ab-line);
}

.page-about .ab-strip-item:nth-child(even) {
  padding-left: 18px;
  border-left: var(--ab-line);
}

.page-about .ab-strip-num {
  font-size: 22px;
  font-weight: 600;
  color: var(--ochre);
  letter-spacing: 0.02em;
}

.page-about .ab-strip-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 30px;
}

.page-about .ab-sec-num {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--ochre);
}

.page-about .ab-sec-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 4.4vw, 40px);
  line-height: 1.18;
  color: var(--ink);
}

.page-about .ab-sec-sub {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  border-left: 2px solid var(--gold);
  padding-left: 14px;
}

.page-about .ab-text {
  max-width: 46em;
}

.page-about .ab-text p {
  margin: 0 0 1.25em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-soft);
}

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

/* ---------- 过渡带 ---------- */
.page-about .ab-band {
  background: var(--ink-green);
  color: var(--snow);
  padding: 34px 0;
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
}

.page-about .ab-band-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-items: baseline;
}

.page-about .ab-band-num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .ab-band-text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 3.4vw, 30px);
  line-height: 1.4;
  color: var(--snow);
}

/* ---------- 编辑方法论 ---------- */
.page-about .ab-method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .ab-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--ab-line);
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: var(--ab-line);
}

.page-about .ab-step-num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 3px;
}

.page-about .ab-step-title {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 编号卡 */
.page-about .ab-id-card {
  margin-top: 28px;
  padding: 22px 20px;
  background: var(--stone);
  border-left: 3px solid var(--ochre);
}

.page-about .ab-id-label {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--grey);
}

.page-about .ab-id-value {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 16px;
  font-size: 17px;
}

.page-about .ab-id-seg {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  padding: 6px 10px;
  background: var(--white);
  border: 1px solid var(--hairline);
  cursor: default;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .ab-id-seg:hover,
.page-about .ab-id-seg:focus-within {
  border-color: var(--gold);
  background: #FBF8F1;
}

.page-about .ab-id-txt {
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-about .ab-id-cap {
  font-family: var(--font-sans);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--ochre);
}

.page-about .ab-id-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-figure--tall figcaption {
  border-left: 2px solid var(--gold);
  padding-left: 10px;
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hairline);
  border: var(--ab-line);
}

.page-about .ab-team-card {
  background: var(--ink-green);
  color: var(--snow);
  padding: 24px 20px 26px;
}

.page-about .ab-team-tag {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .ab-team-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .ab-team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 244, 238, 0.8);
}

.page-about .ab-network {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 30px;
  padding-top: 26px;
  border-top: var(--ab-line);
}

.page-about .ab-network-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.page-about .ab-network-num {
  font-size: 24px;
  font-weight: 600;
  color: var(--ochre);
  line-height: 1.2;
}

.page-about .ab-network-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 26px;
  list-style: none;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--line-gold);
}

.page-about .ab-tl-item {
  position: relative;
  padding-bottom: 32px;
}

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

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--snow);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .ab-tl-item:hover::before {
  transform: scale(1.35);
  box-shadow: 0 0 0 5px var(--snow), 0 0 0 6px var(--line-gold);
}

.page-about .ab-tl-year {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ochre);
}

.page-about .ab-tl-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .ab-tl-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-figure--wide {
  margin-top: 36px;
}

/* ---------- 覆盖范围 ---------- */
.page-about .ab-reach {
  background: var(--stone);
  border-top: var(--ab-line);
  border-bottom: var(--ab-line);
}

.page-about .ab-data-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: var(--ab-line);
}

.page-about .ab-data-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 16px;
  background: var(--stone);
}

.page-about .ab-data-num {
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink-green);
}

.page-about .ab-data-num em {
  font-style: normal;
  font-size: 15px;
  color: var(--ochre);
  margin-left: 2px;
}

.page-about .ab-data-label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .ab-cats {
  margin-top: 30px;
}

.page-about .ab-cats-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  color: var(--ink);
}

.page-about .ab-cat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-about .ab-cat-list .tag {
  padding: 6px 12px;
  background: var(--white);
  border: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .ab-cats-note {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}

/* ---------- 选材准则 ---------- */
.page-about .ab-rules {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .ab-rule {
  padding: 24px 0;
  border-top: var(--ab-line);
}

.page-about .ab-rule:last-child {
  border-bottom: var(--ab-line);
}

.page-about .ab-rule-num {
  display: block;
  margin-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ochre);
}

.page-about .ab-rule h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .ab-rule p {
  margin: 0;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}

/* ---------- 结尾 ---------- */
.page-about .ab-cta {
  background: var(--ochre);
  color: var(--white);
  padding: 52px 0 56px;
}

.page-about .ab-cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-cta-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.3;
  color: var(--white);
}

.page-about .ab-cta-text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.88);
}

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

.page-about .ab-cta .btn-primary {
  background: var(--ink-green);
  border-color: var(--ink-green);
  color: var(--snow);
}

.page-about .ab-cta .btn-primary:hover,
.page-about .ab-cta .btn-primary:focus-visible {
  background: var(--ink-green-soft);
  border-color: var(--ink-green-soft);
}

.page-about .ab-cta .btn-ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--white);
}

.page-about .ab-cta .btn-ghost:hover,
.page-about .ab-cta .btn-ghost:focus-visible {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.12);
}

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

  .page-about .ab-strip-item {
    padding: 20px 18px 22px;
    border-bottom: 0;
    border-left: var(--ab-line);
  }

  .page-about .ab-strip-item:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .ab-strip-item:nth-child(even) {
    padding-left: 18px;
  }

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

  .page-about .ab-data-item {
    padding: 24px 20px;
  }

  .page-about .ab-network {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
  }
}

@media (min-width: 860px) {
  .page-about .ab-hero {
    padding-top: 34px;
  }

  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .ab-sec-head {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
    margin-bottom: 40px;
  }

  .page-about .ab-sec-num {
    padding-top: 8px;
    border-top: 2px solid var(--gold);
  }

  .page-about .ab-band-inner {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .ab-method-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .ab-team-card {
    padding: 30px 24px 34px;
  }

  .page-about .ab-timeline {
    padding-left: 30px;
  }

  .page-about .ab-tl-item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 28px;
    padding-bottom: 38px;
  }

  .page-about .ab-tl-item::before {
    left: -29px;
    top: 6px;
  }

  .page-about .ab-tl-year {
    margin-bottom: 0;
    padding-top: 2px;
    text-align: right;
  }

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

  .page-about .ab-rule {
    padding: 26px 26px 26px 0;
    border-top: var(--ab-line);
    border-right: var(--ab-line);
  }

  .page-about .ab-rule:last-child {
    padding-right: 0;
    border-right: 0;
    border-bottom: 0;
  }

  .page-about .ab-rule:nth-child(2) {
    padding-left: 26px;
  }

  .page-about .ab-rule:nth-child(3) {
    padding-left: 26px;
  }

  .page-about .ab-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 46px;
    align-items: end;
  }

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

@media (min-width: 1080px) {
  .page-about .ab-id-value {
    font-size: 19px;
  }

  .page-about .ab-data-num {
    font-size: 32px;
  }

  .page-about .ab-tl-body h3 {
    font-size: 21px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl-item::before,
  .page-about .ab-id-seg,
  .page-about .breadcrumb-link {
    transition: none;
  }

  .page-about .ab-tl-item:hover::before {
    transform: none;
  }
}
<<<END>>>