.page-about {
  --about-cut: 7deg;
  color: var(--ink);
  background: var(--abyss);
}

.page-about .breadcrumb {
  padding-top: 24px;
  margin-bottom: 0;
}

.page-about .section {
  padding: clamp(40px, 6vw, 88px) 0;
}

/* ============ 品牌声明 ============ */
.page-about .about-intro {
  padding-top: clamp(20px, 3vw, 36px);
  padding-bottom: clamp(36px, 5vw, 72px);
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-intro__title {
  font-size: clamp(34px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 8px 0 20px;
  color: var(--ice);
}

.page-about .about-intro__accent {
  color: var(--orange);
  display: inline-block;
  transform: scaleX(1.04);
  transform-origin: left center;
  text-decoration: underline;
  text-decoration-color: var(--mint);
  text-decoration-thickness: 4px;
  text-underline-offset: 8px;
}

.page-about .about-intro__lead {
  color: var(--ink-dim);
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 42ch;
}

.page-about .about-intro__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line-blue);
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 600;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .stat__unit {
  font-size: 0.65em;
  vertical-align: super;
  margin-left: 1px;
}

.page-about .stat__label {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  font-family: var(--font-mono);
}

.page-about .about-intro__media {
  position: relative;
}

.page-about .about-intro__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-intro__caption {
  margin-top: 10px;
  color: var(--mist);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ============ 通用章节标题 ============ */
.page-about .about-section__title {
  font-size: clamp(26px, 3.8vw, 44px);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 10px 0 14px;
  color: var(--ice);
}

.page-about .about-section__lead {
  max-width: 42em;
  color: var(--ink-dim);
  font-size: clamp(14px, 1.3vw, 16px);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ============ 版本演进时间轴 ============ */
.page-about .about-timeline {
  background: linear-gradient(180deg, var(--abyss) 0%, var(--deepsea) 100%);
}

.page-about .timeline {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 24px 0 24px 28px;
  border-top: 1px solid var(--line-blue);
  position: relative;
}

.page-about .timeline__item:last-child {
  border-bottom: 1px solid var(--line-blue);
}

.page-about .timeline__year {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 10px;
  position: relative;
}

.page-about .timeline__year::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 107, 44, 0.14);
}

.page-about .timeline__year-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 600;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .timeline__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .timeline__title {
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--ice);
}

.page-about .timeline__body p {
  color: var(--ink-dim);
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
  max-width: 50ch;
}

/* ============ 数据编辑台 ============ */
.page-about .about-desk__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-about .about-desk__media {
  order: 2;
}

.page-about .about-desk__text {
  order: 1;
}

.page-about .about-desk__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-desk h2 {
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 900;
  margin: 10px 0 14px;
  color: var(--ice);
  letter-spacing: -0.015em;
}

.page-about .about-desk p {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 46ch;
}

.page-about .about-desk__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-desk__list li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  color: var(--ice);
  line-height: 1.65;
}

.page-about .about-desk__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 2px;
  background: var(--mint);
}

/* ============ 城市协作网络 ============ */
.page-about .about-network {
  background: var(--deepsea);
}

.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  margin-top: 28px;
}

.page-about .about-network__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-network__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.page-about .net-stat {
  padding: 18px 16px;
  border-radius: var(--r-md);
  background: rgba(13, 51, 80, 0.7);
  border: 1px solid var(--line-blue);
  border-left: 3px solid var(--mint);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .net-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 600;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .net-stat__label {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  line-height: 1.4;
}

.page-about .about-network__cities {
  margin-top: 28px;
  padding: 14px 18px;
  border-radius: var(--r-pill);
  background: rgba(255, 107, 44, 0.08);
  border: 1px solid rgba(255, 107, 44, 0.25);
  color: var(--glow);
  font-size: 13px;
  line-height: 1.6;
  display: inline-block;
}

/* ============ 团队分工 ============ */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .about-team__intro h2 {
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 900;
  margin: 10px 0 14px;
  color: var(--ice);
  letter-spacing: -0.015em;
}

.page-about .about-team__intro p {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.8;
  max-width: 46ch;
}

.page-about .about-team__chart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.page-about .ring {
  width: clamp(180px, 22vw, 220px);
  aspect-ratio: 1;
  border-radius: 50%;
  position: relative;
  background: conic-gradient(
    var(--orange) 0 42.1%,
    var(--mint) 42.1% 73.7%,
    var(--glow) 73.7% 92.1%,
    var(--mist) 92.1% 100%
  );
  flex-shrink: 0;
}

.page-about .ring::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.06), transparent 60%);
  pointer-events: none;
}

.page-about .ring__center {
  position: absolute;
  inset: 26%;
  background: var(--deepsea);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  z-index: 1;
}

.page-about .ring__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 600;
  color: var(--ice);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .ring__label {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .legend {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .legend__item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--ice);
}

.page-about .legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
}

.page-about .legend__item--edit .legend__dot {
  background: var(--orange);
}

.page-about .legend__item--tech .legend__dot {
  background: var(--mint);
}

.page-about .legend__item--ops .legend__dot {
  background: var(--glow);
}

.page-about .legend__item--cs .legend__dot {
  background: var(--mist);
}

/* ============ 大号引用 ============ */
.page-about .about-quote {
  background: var(--steel);
  position: relative;
  overflow: hidden;
}

.page-about .about-quote::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    transparent 0,
    transparent 48px,
    rgba(45, 226, 192, 0.04) 48px,
    rgba(45, 226, 192, 0.04) 49px
  );
  pointer-events: none;
}

.page-about .pullquote {
  position: relative;
  max-width: 60ch;
  margin: 0 auto;
  text-align: center;
}

.page-about .pullquote p {
  font-size: clamp(19px, 2.3vw, 28px);
  line-height: 1.55;
  font-weight: 700;
  color: var(--ice);
  margin: 0 0 18px;
}

.page-about .pullquote p::before {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  background: var(--orange);
  margin: 0 auto 18px;
  border-radius: 2px;
}

.page-about .pullquote__src {
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint) !important;
  font-weight: 400 !important;
  margin: 0 !important;
}

/* ============ 服务节奏 ============ */
.page-about .about-principles__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-about .principle {
  padding: 22px 20px;
  border-radius: var(--r-md);
  background: var(--deepsea);
  border: 1px solid var(--line-blue);
  position: relative;
  overflow: hidden;
}

.page-about .principle::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--orange);
}

.page-about .principle__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 8px;
  display: block;
}

.page-about .principle__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
  margin: 0 0 6px;
}

.page-about .principle__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-dim);
  margin: 0;
}

/* ============ CTA ============ */
.page-about .about-cta {
  padding: clamp(40px, 5vw, 72px) 0;
  background: linear-gradient(135deg, var(--deepsea), var(--abyss));
  border-top: 1px solid var(--line-blue);
}

.page-about .about-cta__inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}

.page-about .about-cta h2 {
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 900;
  color: var(--ice);
  margin: 0 0 8px;
}

.page-about .about-cta p {
  color: var(--ink-dim);
  font-size: 14px;
  margin: 0;
  max-width: 46ch;
  line-height: 1.7;
}

.page-about .about-cta__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============ 断点增强 ============ */
@media (min-width: 640px) {
  .page-about .about-intro__stats {
    gap: 32px;
  }
  .page-about .about-principles__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-network__stats {
    gap: 16px;
  }
  .page-about .net-stat {
    padding: 22px 20px;
  }
  .page-about .legend {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
  }
  .page-about .about-team__chart {
    flex-direction: row;
    justify-content: center;
  }
  .page-about .about-cta__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 768px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: center;
  }
  .page-about .about-desk__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(32px, 4vw, 56px);
  }
  .page-about .about-desk__media {
    order: 1;
  }
  .page-about .about-desk__text {
    order: 2;
  }
  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
  .page-about .timeline__item {
    grid-template-columns: 140px 1fr;
    gap: clamp(20px, 3.5vw, 44px);
    padding: 28px 0;
  }
  .page-about .timeline__year {
    position: sticky;
    top: 88px;
    align-self: start;
    flex-direction: column;
    gap: 6px;
    padding-left: 24px;
  }
  .page-about .timeline__year::before {
    left: 0;
    top: 6px;
  }
  .page-about .timeline__body p {
    font-size: 15px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-intro__lead {
    font-size: 17px;
  }
  .page-about .timeline__item {
    grid-template-columns: 160px 1fr;
    padding: 32px 0;
  }
  .page-about .timeline__year {
    padding-left: 28px;
  }
  .page-about .timeline__year::before {
    left: 0;
    top: 8px;
  }
  .page-about .about-principles__grid {
    gap: 16px;
  }
  .page-about .principle {
    padding: 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}
<<<END>>>