.page-about {
  --about-line: rgba(11, 31, 58, 0.14);
  --about-line-dark: rgba(45, 224, 192, 0.28);
  color: var(--ink);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 2.5rem 0 3rem;
  background:
    radial-gradient(circle at 82% 22%, rgba(45, 224, 192, 0.12), transparent 42%),
    linear-gradient(180deg, var(--mist), var(--paper));
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--about-line);
}
.page-about .about-hero-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}
.page-about .about-hero-copy .breadcrumb {
  margin-bottom: 1.25rem;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--grid);
}
.page-about .about-hero .eyebrow,
.page-about .about-toc .toc-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}
.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2.25rem, 6.4vw, 4.6rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.page-about .about-hero .lead {
  margin: 0 0 1.75rem;
  max-width: 38rem;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink-2);
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.page-about .hero-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--about-line);
  border-radius: 2px;
  background: var(--paper);
  font-size: 0.8125rem;
  color: var(--ink-2);
}
.page-about .hero-chip-num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--orange);
}
.page-about .about-hero-visual {
  margin: 0;
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  background: var(--ink);
}
.page-about .about-hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 49.4%, rgba(45, 224, 192, 0.35) 50%, transparent 50.6%),
    linear-gradient(0deg, transparent 49.4%, rgba(45, 224, 192, 0.35) 50%, transparent 50.6%);
  pointer-events: none;
  z-index: 1;
}
.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 页内目录 ---------- */
.page-about .about-toc {
  padding: 1.25rem 0;
  background: var(--paper);
  border-bottom: 1px solid var(--about-line);
}
.page-about .about-toc .wrap {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-about .toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .toc-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  font-size: 0.875rem;
  color: var(--ink-2);
  text-decoration: none;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}
.page-about .toc-link:hover,
.page-about .toc-link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--orange);
}
.page-about .toc-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--orange);
  letter-spacing: 0.04em;
}

/* ---------- 通用区块装饰 ---------- */
.page-about .section {
  position: relative;
  padding: 3.5rem 0;
}
.page-about .section .index-num {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--grid);
}
.page-about .section .section-head h2 {
  margin: 0.35rem 0 1rem;
  font-size: clamp(1.65rem, 3.6vw, 2.5rem);
  line-height: 1.18;
  font-weight: 800;
  color: var(--ink);
}
.page-about .section .section-head .lead {
  margin: 0;
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink-2);
}
.page-about .section--dark {
  background: var(--ink);
  color: var(--mist);
}
.page-about .section--dark .eyebrow {
  color: var(--cyan);
}
.page-about .section--dark .index-num {
  color: rgba(244, 247, 250, 0.42);
}
.page-about .section--dark .section-head h2 {
  color: var(--paper);
}
.page-about .section--dark .section-head .lead {
  color: var(--on-dark);
}
.page-about a {
  color: var(--orange);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.page-about .section--dark a {
  color: var(--cyan);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-creed {
  background: var(--mist);
}
.page-about .creed-head h2 {
  max-width: 28rem;
}
.page-about .creed-lead {
  max-width: 46rem;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-2);
  margin-bottom: 2rem;
}
.page-about .creed-grid {
  gap: 1.25rem;
}
.page-about .creed-card {
  position: relative;
  padding: 1.5rem 1.25rem 1.35rem;
  background: var(--paper);
  border-top: 3px solid var(--orange);
  box-shadow: 0 1px 0 var(--about-line);
}
.page-about .creed-card h3 {
  margin: 0.65rem 0 0.6rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .creed-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .creed-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--grid);
}
.page-about .creed-note {
  margin: 1.75rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--cyan);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 发展阶段时间轴 ---------- */
.page-about .phase-track {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  position: relative;
}
.page-about .phase-track::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), transparent 95%);
  opacity: 0.65;
}
.page-about .phase {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 1rem;
  padding: 0 0 2rem;
}
.page-about .phase:last-child {
  padding-bottom: 0;
}
.page-about .phase-num {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 1px solid var(--about-line-dark);
  background: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.04em;
}
.page-about .phase-body h3 {
  margin: 0.35rem 0 0.55rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--paper);
}
.page-about .phase-body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--on-dark);
  max-width: 44rem;
}

/* ---------- 团队构成 ---------- */
.page-about .about-team {
  background: var(--paper);
}
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
  align-items: start;
}
.page-about .team-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.15rem;
}
.page-about .team-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 0.9rem;
  padding-bottom: 1.05rem;
  border-bottom: 1px solid var(--about-line);
}
.page-about .team-item:last-child {
  border-bottom: none;
}
.page-about .roster-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
  line-height: 1.3;
}
.page-about .team-item h3 {
  margin: 0 0 0.4rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .team-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .team-link-row {
  margin: 1.25rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .team-visual {
  margin: 0;
  background: var(--mist);
  border: 1px solid var(--about-line);
  padding: 0.75rem;
}
.page-about .team-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .team-visual figcaption,
.page-about .coverage-map figcaption {
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  color: var(--grid);
  line-height: 1.6;
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-coverage {
  background: var(--mist);
}
.page-about .coverage-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
.page-about .coverage-stat {
  background: var(--paper);
  padding: 1.15rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  line-height: 1.1;
}
.page-about .stat-label {
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--grid);
}
.page-about .coverage-map {
  margin: 0;
  background: var(--paper);
  border: 1px solid var(--about-line);
  padding: 0.75rem;
}
.page-about .coverage-map img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .coverage-notes {
  margin-top: 1.5rem;
  gap: 1.25rem;
}
.page-about .coverage-note h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .coverage-note p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 资质 ---------- */
.page-about .about-trust {
  background: var(--ink);
}
.page-about .trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}
.page-about .trust-card {
  padding: 1.5rem 1.35rem;
  border: 1px solid var(--about-line-dark);
  background: rgba(18, 43, 78, 0.72);
}
.page-about .trust-badge {
  display: inline-block;
  padding: 0.3rem 0.6rem;
  margin-bottom: 0.9rem;
  border-radius: 2px;
  border: 1px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.page-about .trust-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--paper);
}
.page-about .trust-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--on-dark);
}
.page-about .trust-note {
  margin: 1.75rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--on-dark);
}

/* ---------- 伙伴生态 ---------- */
.page-about .about-ecosystem {
  background: var(--paper);
}
.page-about .eco-grid {
  margin-top: 2rem;
  gap: 1.5rem;
}
.page-about .eco-card {
  position: relative;
  padding: 1.5rem 1.35rem 1.35rem;
  background: var(--mist);
  border-left: 3px solid var(--orange);
}
.page-about .eco-count {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  line-height: 1.1;
}
.page-about .eco-count em {
  font-style: normal;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--grid);
}
.page-about .eco-card h3 {
  margin: 0.7rem 0 0.45rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .eco-card p {
  margin: 0 0 0.85rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .eco-list {
  margin: 0;
  padding: 0 0 0 1.1rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-about .eco-list li {
  margin-bottom: 0.3rem;
}
.page-about .eco-list li::marker {
  color: var(--orange);
}

/* ---------- 会员协作理念 ---------- */
.page-about .about-membership {
  background: var(--mist);
}
.page-about .member-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}
.page-about .member-card {
  padding: 1.35rem 1.2rem 1.25rem;
  background: var(--paper);
  border-top: 4px solid var(--grid);
  box-shadow: 0 1px 0 var(--about-line);
}
.page-about .member-card--bronze {
  border-top-color: var(--bronze);
}
.page-about .member-card--silver {
  border-top-color: var(--silver);
}
.page-about .member-card--gold {
  border-top-color: var(--gold);
}
.page-about .member-card h3 {
  margin: 0.8rem 0 0.55rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--ink);
}
.page-about .member-card p {
  margin: 0 0 0.8rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}
.page-about .member-card ul {
  margin: 0;
  padding: 0 0 0 1.1rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-about .member-card li {
  margin-bottom: 0.3rem;
}
.page-about .member-card li::marker {
  color: var(--orange);
}
.page-about .member-note {
  margin: 1.75rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--cyan);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 结尾行动 ------------------------------ */
.page-about .about-cta {
  padding: 3rem 0;
  background: var(--ink-2);
  color: var(--mist);
}
.page-about .about-cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  align-items: center;
}
.page-about .about-cta .eyebrow {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}
.page-about .about-cta h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.5rem, 3.2vw, 2.15rem);
  line-height: 1.2;
  font-weight: 800;
  color: var(--paper);
}
.page-about .about-cta p {
  margin: 0;
  max-width: 38rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--on-dark);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-about .about-cta .btn {
  display: inline-block;
}
.page-about .about-cta .btn--outline {
  border: 1px solid var(--cyan);
  color: var(--mist);
}

/* ---------- 断点增强 ---------- */
@media (min-width: 720px) {
  .page-about .about-toc .wrap {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
  }
  .page-about .about-hero {
    padding: 3.5rem 0 4rem;
  }
  .page-about .section {
    padding: 4.25rem 0;
  }
  .page-about .creed-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .coverage-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .member-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .eco-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1.4fr) auto;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero {
    padding: 4.5rem 0 5rem;
  }
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: center;
    gap: 3.5rem;
  }
  .page-about .section {
    padding: 5rem 0;
  }
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
  }
  .page-about .coverage-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .phase-track {
    margin-top: 2.75rem;
  }
  .page-about .phase {
    grid-template-columns: 72px 1fr;
    gap: 1.75rem;
    padding-bottom: 2.75rem;
  }
  .page-about .phase-track::before {
    left: 35px;
  }
  .page-about .phase-num {
    width: 72px;
    height: 72px;
    font-size: 1.125rem;
  }
  .page-about .phase-body h3 {
    font-size: 1.25rem;
    margin-top: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .toc-link {
    transition: none;
  }
}
<<<END>>><!-- 说明：上文  后为页面专属样式，正文到此结束 -->
</main>