.page-about {
  --ab-gap: clamp(24px, 4vw, 44px);
  --ab-ice-ink: #38495a;
  --ab-ice-accent: #0f8c78;
  background: var(--graphite);
  color: var(--ink);
  font-family: var(--ff-sans);
  overflow-x: hidden;
}

.page-about .wrap {
  padding-left: 0;
  padding-right: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 80% 14%, rgba(35, 240, 208, .12), transparent 58%),
    radial-gradient(circle at 12% 92%, rgba(122, 92, 255, .12), transparent 52%),
    var(--deep);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, transparent 0 71px, var(--line-soft) 71px 72px),
    repeating-linear-gradient(0deg, transparent 0 71px, var(--line-soft) 71px 72px);
  opacity: .6;
  pointer-events: none;
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .crumb {
  padding-top: 18px;
  font-size: .8125rem;
  color: var(--muted);
}

.page-about .about-hero .crumb a {
  color: var(--muted);
}

.page-about .about-hero .crumb a:hover,
.page-about .about-hero .crumb a:focus-visible {
  color: var(--cyan);
}

.page-about .hero-grid {
  display: grid;
  gap: var(--ab-gap);
  padding: clamp(26px, 5vw, 64px) 0 clamp(30px, 5vw, 62px);
}

.page-about .hero-copy .eyebrow {
  color: var(--cyan);
}

.page-about .hero-copy h1 {
  margin: 14px 0 18px;
}

.page-about .hero-copy .lede {
  max-width: 54ch;
  color: var(--muted);
}

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

.page-about .hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
  align-content: start;
  border-top: 1px solid var(--line-signal);
}

.page-about .hero-metric {
  padding: 14px 0 16px;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-about .hero-metric-num {
  display: block;
  font-family: var(--ff-mono);
  font-size: clamp(1.4rem, 4.6vw, 1.95rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .hero-metric-label {
  display: block;
  margin-top: 8px;
  font-size: .8125rem;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin .origin-grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .origin-main h2 {
  margin: 12px 0 16px;
}

.page-about .origin-main p {
  margin: 0 0 14px;
  color: var(--ink);
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .origin-note {
  border-left: 2px solid var(--orange);
  background: var(--panel);
  padding: 18px 18px 20px;
}

.page-about .origin-note-title {
  margin: 0 0 10px;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .origin-note p:not(.origin-note-title) {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .text-link {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 3px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--cyan);
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--ice);
}

/* ---------- 通用章节头 ---------- */
.page-about .section-head {
  margin-bottom: clamp(22px, 3.4vw, 36px);
  max-width: 62ch;
}

.page-about .section-head h2 {
  margin: 12px 0 12px;
}

.page-about .section-head .lede {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
}

/* ---------- 团队分工 ---------- */
.page-about .team-layout {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
  font-size: .75rem;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .role-grid {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.page-about .role-card {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.page-about .role-card:hover {
  border-color: var(--line-signal);
  transform: translateY(-2px);
}

.page-about .role-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-about .role-num {
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .role-count {
  font-family: var(--ff-mono);
  font-size: 1.375rem;
  font-weight: 600;
  line-height: 1;
  color: var(--orange);
}

.page-about .role-count small {
  margin-left: 2px;
  font-size: .6875rem;
  font-weight: 400;
  color: var(--muted);
}

.page-about .role-name {
  margin: 12px 0 8px;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .role-duties {
  margin: 0;
  padding-left: 1.05em;
  font-size: .875rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .role-duties li {
  margin-bottom: 4px;
}

.page-about .role-duties li:last-child {
  margin-bottom: 0;
}

/* ---------- 内容生产流程（浅色带） ---------- */
.page-about .flow-band {
  background: var(--ice);
  color: var(--deep);
  border-top: 1px solid rgba(7, 26, 47, .14);
  border-bottom: 1px solid rgba(7, 26, 47, .14);
}

.page-about .flow-band .eyebrow {
  color: var(--ab-ice-accent);
}

.page-about .flow-band .eyebrow::before {
  background: var(--ab-ice-accent);
}

.page-about .flow-band .display--sm {
  color: var(--deep);
}

.page-about .flow-band .lede {
  color: var(--ab-ice-ink);
}

.page-about .about-figure--flow {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border-color: rgba(7, 26, 47, .16);
  background: #e8f3f0;
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(7, 26, 47, .18);
}

.page-about .step {
  padding: 16px 2px 18px;
  border-bottom: 1px solid rgba(7, 26, 47, .16);
  transition: background var(--fast) var(--ease);
}

.page-about .step:hover {
  background: rgba(7, 26, 47, .06);
}

.page-about .step-num {
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--ab-ice-accent);
}

.page-about .step-title {
  margin: 7px 0 6px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--deep);
}

.page-about .step-text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.62;
  color: var(--ab-ice-ink);
}

.page-about .flow-note {
  margin: 20px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--ab-ice-accent);
  font-size: .875rem;
  line-height: 1.6;
  color: #0b4d43;
}

/* ---------- 发展历程 ---------- */
.page-about .about-figure--wide {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(35, 240, 208, .08));
}

.page-about .tl-item {
  position: relative;
  margin-bottom: 12px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 16px;
  width: 9px;
  height: 9px;
  background: var(--graphite);
  border: 1px solid var(--cyan);
}

.page-about .tl-item details {
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .tl-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 13px 16px;
  list-style: none;
  cursor: pointer;
  transition: background var(--fast) var(--ease);
}

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

.page-about .tl-item summary:hover {
  background: rgba(35, 240, 208, .06);
}

.page-about .tl-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .tl-year {
  font-family: var(--ff-mono);
  font-size: .8125rem;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .tl-title {
  font-size: .9375rem;
  font-weight: 600;
  color: var(--ink);
  min-width: 0;
}

.page-about .tl-plus {
  margin-left: auto;
  font-family: var(--ff-mono);
  font-size: .875rem;
  color: var(--muted);
  transition: transform var(--mid) var(--ease), color var(--fast) var(--ease);
}

.page-about .tl-item details[open] > summary {
  background: rgba(35, 240, 208, .08);
  border-bottom: 1px solid var(--line);
}

.page-about .tl-item details[open] .tl-plus {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .tl-body {
  padding: 13px 16px 16px;
}

.page-about .tl-body p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 合作生态与荣誉 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .partner-main h2 {
  margin: 12px 0 16px;
}

.page-about .partner-main p {
  margin: 0 0 14px;
  line-height: 1.72;
  color: var(--ink);
  max-width: 58ch;
}

.page-about .partner-main .btn {
  margin-top: 6px;
}

.page-about .honor-list {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .honor-item {
  padding: 14px 16px;
  border-left: 2px solid var(--violet);
  background: var(--panel);
}

.page-about .honor-year {
  font-family: var(--ff-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--violet);
}

.page-about .honor-item p {
  margin: 7px 0 0;
  font-size: .9375rem;
  line-height: 1.55;
  color: var(--ink);
}

/* ---------- 服务规模与回访 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .reach-metrics {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-cyan);
}

.page-about .reach-metric {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .reach-metric-num {
  font-family: var(--ff-mono);
  font-size: clamp(1.2rem, 3.6vw, 1.55rem);
  font-weight: 600;
  color: var(--cyan);
  min-width: 6em;
}

.page-about .reach-metric-label {
  flex: 1 1 12ch;
  font-size: .875rem;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .reach-copy p {
  margin: 0 0 14px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .reach-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

  .page-about .step {
    padding: 18px 18px 20px;
    border-bottom: 0;
    border-right: 1px solid rgba(7, 26, 47, .14);
  }

  .page-about .step:last-child {
    border-right: 0;
  }

  .page-about .timeline {
    padding-left: 28px;
  }

  .page-about .tl-item::before {
    left: -28px;
    top: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .58fr);
    align-items: start;
    gap: clamp(32px, 5vw, 76px);
  }

  .page-about .hero-metrics {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .75fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: clamp(24px, 3.4vw, 40px);
  }

  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .reach-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .step,
  .page-about .tl-plus,
  .page-about .tl-item summary {
    transition: none;
  }

  .page-about .role-card:hover {
    transform: none;
  }
}
<<<END>>>