.page-about {
  --about-gap: clamp(1.5rem, 3.5vw, 2.75rem);
  --about-rule: 1px solid var(--rule);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(1.5rem, 4.5vw, 3.25rem));
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -22%;
  bottom: -55%;
  width: 62vw;
  height: 62vw;
  max-width: 700px;
  max-height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 139, 60, 0.16), rgba(232, 139, 60, 0) 66%);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 8.2vw, 4.9rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.page-about .about-hero__intro {
  margin: clamp(1rem, 2.5vw, 1.5rem) 0 0;
  max-width: 56ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--fg-muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

.page-about .about-hero__aside {
  border: var(--about-rule);
  border-top: 2px solid var(--amber);
  background: rgba(24, 39, 71, 0.62);
  padding: 1.25rem 1.25rem 1.4rem;
}

.page-about .about-hero__aside-title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stat-num {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1;
  color: var(--paper-bright);
}

.page-about .about-hero__unit {
  font-size: 0.55em;
  margin-left: 0.1em;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  color: var(--mist);
}

.page-about .about-hero__aside-note {
  margin: 1.15rem 0 0;
  padding-top: 0.9rem;
  border-top: var(--about-rule);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__head {
  max-width: 48ch;
}

.page-about .about-origin__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-origin__body {
  display: grid;
  gap: 1.15rem;
  margin-top: clamp(1.25rem, 3vw, 1.9rem);
  max-width: 66ch;
  font-size: 1.0625rem;
  line-height: 1.85;
}

.page-about .about-origin__body p {
  margin: 0;
}

.page-about .about-origin__media {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

/* ---------- 服务网络 ---------- */
.page-about .about-network__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-city__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-city {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.15rem 0.9rem;
  padding: 0.85rem 0.5rem 0.85rem 0;
  border-bottom: var(--about-rule);
  transition: background-color 180ms ease, padding-left 180ms ease;
}

.page-about .about-city:hover {
  background: rgba(59, 125, 191, 0.1);
  padding-left: 0.5rem;
}

.page-about .about-city__num {
  grid-row: span 2;
  align-self: start;
  font-size: 0.75rem;
  color: var(--yellow);
  padding-top: 0.35rem;
}

.page-about .about-city__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--fg);
}

.page-about .about-city__meta {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--fg-muted);
}

.page-about .about-network__cities-note {
  margin: 1.15rem 0 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--fg-muted);
}

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

.page-about .about-touch {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: var(--about-rule);
}

.page-about .about-touch__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
}

.page-about .about-touch__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--fg-muted);
}

.page-about .about-touch__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
}

/* ---------- 合作网点 ---------- */
.page-about .about-partner__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-partner__step {
  padding: 1.5rem 0 1.5rem 0;
  border-bottom: var(--about-rule);
}

.page-about .about-partner__num {
  display: inline-block;
  margin-bottom: 0.6rem;
  font-size: 0.8125rem;
  color: var(--blue);
  border: 1px solid currentColor;
  padding: 0.1rem 0.5rem;
}

.page-about .about-partner__step-title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
}

.page-about .about-partner__step p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about .about-partner__note {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  max-width: 62ch;
}

.page-about .about-partner__note p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-team__bars {
  display: grid;
  gap: 0.75rem;
}

.page-about .about-team__role {
  border: var(--about-rule);
  background: rgba(24, 39, 71, 0.5);
  padding: 0.95rem 1rem 1.05rem;
}

.page-about .about-team__summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
}

.page-about .about-team__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__role-name {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--fg);
}

.page-about .about-team__role-count {
  font-size: 0.8125rem;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .about-team__bar {
  display: block;
  height: 4px;
  margin: 0.7rem 0 0;
  background: rgba(42, 58, 99, 0.85);
  overflow: hidden;
}

.page-about .about-team__bar-fill {
  display: block;
  height: 100%;
}

.page-about .about-team__bar-fill--amber {
  background: var(--amber);
}

.page-about .about-team__bar-fill--blue {
  background: var(--blue);
}

.page-about .about-team__bar-fill--green {
  background: var(--green);
}

.page-about .about-team__role-desc {
  margin: 0.8rem 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--fg-muted);
}

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

/* ---------- 时间轴 ---------- */
.page-about .about-tl__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-tl__index-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.page-about .about-tl__index-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl__index-link {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-decoration: none;
  color: var(--fg-muted);
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .about-tl__index-link:hover,
.page-about .about-tl__index-link.is-active {
  color: var(--ink-900);
  background: var(--yellow);
  border-color: var(--yellow);
}

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

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 clamp(1.75rem, 4vw, 2.5rem) clamp(1.5rem, 4vw, 2.25rem);
  border-left: 1px solid var(--rule);
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 0.45rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .about-tl__year {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--red);
}

.page-about .about-tl__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  line-height: 1.3;
}

.page-about .about-tl__text {
  margin: 0;
  max-width: 60ch;
  font-size: 0.9375rem;
  line-height: 1.85;
}

.page-about .about-tl__tag {
  margin: 0.85rem 0 0;
}

/* ---------- 查证 ---------- */
.page-about .about-verify__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-verify__main {
  max-width: 66ch;
}

.page-about .about-verify__main p {
  margin: 0 0 1.1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--fg-muted);
}

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

.page-about .about-verify__link {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .about-verify__link:hover {
  color: var(--amber);
}

.page-about .about-verify__aside {
  padding: 1.25rem 1.25rem 1.35rem;
  border: var(--about-rule);
  border-left: 3px solid var(--yellow);
  background: rgba(24, 39, 71, 0.55);
}

.page-about .about-verify__aside-title {
  margin: 0 0 1rem;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-verify__facts {
  display: grid;
  gap: 1rem;
  margin: 0;
}

.page-about .about-verify__fact dt {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .about-verify__fact dd {
  margin: 0.3rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--fg);
}

.page-about .about-verify__aside-note {
  margin: 1.15rem 0 0;
  padding-top: 0.9rem;
  border-top: var(--about-rule);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 四个理由 ---------- */
.page-about .about-why__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-why__item {
  padding: 1.25rem 1.15rem 1.35rem;
  border: var(--about-rule);
  background: var(--paper-bright);
  box-shadow: 4px 4px 0 rgba(42, 58, 99, 0.16);
}

.page-about .about-why__num {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-about .about-why__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.3vw, 1.3rem);
  line-height: 1.35;
}

.page-about .about-why__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4.2vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-cta__text-body {
  margin: 0.9rem 0 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--fg-muted);
}

.page-about .about-cta__actions {
  display: grid;
  gap: 0.75rem;
}

/* ---------- 媒体微调 ---------- */
.page-about .media__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-network__figure .media__frame,
.page-about .about-team__figure .media__frame {
  border: 1px solid var(--line);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-touch__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.75rem;
  }

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

  .page-about .about-cta__actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: 420px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 330px);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-network__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-verify__layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-tl__grid {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .about-tl__index {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    align-self: start;
  }

  .page-about .about-tl__index-list {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-tl__index-link {
    display: block;
    text-align: center;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 300px);
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-city,
  .page-about .about-tl__index-link {
    transition: none;
  }
}
<<<END>>>