.page-about {
  --about-space: clamp(52px, 8vw, 96px);
  --about-ink-hair: rgba(244, 246, 248, 0.16);
  --about-line: rgba(199, 209, 218, 0.26);
  background: var(--paper);
  color: var(--text);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  line-height: 1.16;
  letter-spacing: -0.02em;
}

.page-about p {
  margin: 0;
  line-height: 1.85;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 0;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-ink-hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-ink-hair) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.35;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(34px, 5vw, 60px);
}

.page-about .about-hero .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(244, 246, 248, 0.58);
}

.page-about .about-hero .crumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 140ms var(--ease), border-color 140ms var(--ease);
}

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

.page-about .about-hero .crumbs [aria-current="page"] {
  color: var(--cyan);
}

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

.page-about .about-hero h1 {
  font-size: clamp(32px, 6.4vw, 64px);
  font-weight: 900;
  color: #fff;
  max-width: 18em;
}

.page-about .about-hero .lead {
  margin-top: 20px;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  color: rgba(244, 246, 248, 0.76);
}

.page-about .about-hero__badge {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px;
  border: 1px solid var(--about-ink-hair);
  font-size: 13px;
  color: rgba(244, 246, 248, 0.7);
}

.page-about .about-hero__badge .mono {
  color: var(--orange);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-route {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
}

.page-about .about-route__path {
  stroke-dasharray: 900;
  stroke-dashoffset: 900;
  animation: about-route-draw 1100ms var(--ease) 180ms forwards;
}

@keyframes about-route-draw {
  to {
    stroke-dashoffset: 0;
  }
}

.page-about .about-stats {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--about-ink-hair);
}

.page-about .about-stats__item {
  padding: 18px 12px 18px 0;
  border-bottom: 1px solid var(--about-ink-hair);
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-stats__item:nth-child(4) .about-stats__num {
  color: var(--orange);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(244, 246, 248, 0.6);
}

/* ---------- 主张 ---------- */
.page-about .about-claim,
.page-about .about-team {
  padding-block: var(--about-space);
  background: var(--paper);
}

.page-about .about-claim__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-claim__intro h2 {
  font-size: clamp(26px, 4.4vw, 44px);
  font-weight: 900;
}

.page-about .about-claim__body .lead {
  font-size: clamp(16px, 1.8vw, 18px);
  color: var(--text);
}

.page-about .about-claim__body > p + p {
  margin-top: 16px;
  color: var(--muted);
  font-size: 15px;
}

.page-about .about-claim__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-light);
  border-top: 1px solid var(--line-light);
}

.page-about .about-claim__item {
  background: var(--paper);
  padding: 20px 16px 22px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-claim__item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

.page-about .about-claim__item p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-band {
  padding-block: var(--about-space);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-head {
  max-width: 46em;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-head h2 {
  font-size: clamp(26px, 4.2vw, 42px);
  font-weight: 900;
}

.page-about .about-head__lead {
  margin-top: 16px;
  font-size: 15px;
  color: var(--muted);
  max-width: 40em;
}

.page-about .about-timeline-band .eyebrow {
  color: var(--cyan);
}

.page-about .about-timeline-band .about-head__lead {
  color: rgba(244, 246, 248, 0.68);
}

.page-about .about-figure {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-light);
  background: var(--mist);
}

.page-about .about-timeline-band .about-figure img {
  border-color: var(--about-ink-hair);
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.page-about .about-timeline-band .about-figure__cap {
  color: rgba(244, 246, 248, 0.5);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 16px;
  margin-bottom: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--about-ink-hair);
}

.page-about .about-jump a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  padding: 7px 12px;
  color: rgba(244, 246, 248, 0.66);
  border: 1px solid var(--about-ink-hair);
  text-decoration: none;
  transition: color 150ms var(--ease), background 150ms var(--ease), border-color 150ms var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan), rgba(35, 224, 208, 0.12));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(28px, 5vw, 46px) 30px;
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1px solid var(--orange);
  background: var(--ink);
  box-shadow: 0 0 0 4px var(--ink);
}

.page-about .about-timeline__item--now::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px var(--ink), 0 0 0 8px rgba(255, 122, 61, 0.18);
}

.page-about .about-timeline__marker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .about-timeline__year {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.01em;
}

.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid var(--about-ink-hair);
  color: rgba(244, 246, 248, 0.66);
}

.page-about .about-timeline__body h3 {
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  color: #fff;
}

.page-about .about-timeline__body p {
  margin-top: 12px;
  max-width: 40em;
  font-size: 15px;
  color: rgba(244, 246, 248, 0.72);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-team h2 {
  font-size: clamp(26px, 4.2vw, 42px);
  font-weight: 900;
}

.page-about .about-team__lead {
  margin-top: 16px;
  max-width: 38em;
  font-size: 15px;
  color: var(--muted);
}

.page-about .about-slices {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-light);
}

.page-about .about-slices__item {
  position: relative;
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px 12px 18px 0;
  border-bottom: 1px solid var(--line-light);
  transition: background 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-about .about-slices__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--teal);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 200ms var(--ease);
}

.page-about .about-slices__item:hover,
.page-about .about-slices__item:focus-within {
  background: var(--mist);
  padding-left: 14px;
}

.page-about .about-slices__item:hover::before,
.page-about .about-slices__item:focus-within::before {
  transform: scaleY(1);
}

.page-about .about-slices__num {
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
  letter-spacing: -0.03em;
}

.page-about .about-slices__item--key .about-slices__num {
  color: var(--orange);
}

.page-about .about-slices__item--key::before {
  background: var(--orange);
}

.page-about .about-slices__item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-slices__note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-light);
  background: var(--mist);
}

/* ---------- 服务能力 ---------- */
.page-about .about-service {
  padding-block: var(--about-space);
  background: var(--mist);
  color: var(--text);
}

.page-about .about-service .eyebrow {
  color: var(--teal);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-light);
  border: 1px solid var(--line-light);
}

.page-about .about-metrics__item {
  background: var(--paper);
  padding: 20px 16px 22px;
}

.page-about .about-metric__num {
  margin: 0;
  font-size: clamp(26px, 4.6vw, 40px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--ink);
  letter-spacing: -0.03em;
}

.page-about .about-metric__unit {
  margin-left: 5px;
  font-size: 0.42em;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0;
}

.page-about .about-metric__label {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-figure--service {
  margin-top: clamp(26px, 4vw, 40px);
  margin-bottom: 0;
}

.page-about .about-service__note {
  margin-top: 22px;
  max-width: 46em;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding-block: var(--about-space);
  background: var(--ink-2);
  color: var(--paper);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

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

.page-about .about-partners h2 {
  font-size: clamp(26px, 4.2vw, 42px);
  font-weight: 900;
  color: #fff;
  max-width: 16em;
}

.page-about .about-partners__stat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--about-ink-hair);
}

.page-about .about-partners__num {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.03em;
}

.page-about .about-partners__num-unit {
  font-size: 0.55em;
  margin-left: 2px;
}

.page-about .about-partners__stat p {
  font-size: 14px;
  color: rgba(244, 246, 248, 0.72);
}

.page-about .about-partners__side h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-ink-hair);
}

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

.page-about .about-partners__list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--about-ink-hair);
}

.page-about .about-partners__list strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.page-about .about-partners__list span {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: rgba(244, 246, 248, 0.68);
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-partners__foot {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(244, 246, 248, 0.52);
}

.page-about .about-partners__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 224, 208, 0.4);
}

.page-about .about-partners__foot a:hover,
.page-about .about-partners__foot a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats__item {
    padding: 22px 20px 22px 0;
    border-bottom: 0;
    border-top: 1px solid var(--about-ink-hair);
  }

  .page-about .about-claim__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    background: transparent;
    border-top: 0;
  }

  .page-about .about-claim__item {
    padding: 18px 18px 0 0;
    border-bottom: 0;
    border-top: 2px solid var(--line-light);
  }

  .page-about .about-claim__item h3 {
    border-left: 0;
    padding-left: 0;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }

  .page-about .about-hero__visual {
    border-left: 1px solid var(--about-ink-hair);
    padding-left: clamp(20px, 3vw, 40px);
  }

  .page-about .about-claim__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-claim__intro {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-partners__side {
    border-left: 1px solid var(--about-ink-hair);
    padding-left: clamp(24px, 3vw, 40px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline {
    --tl-marker: 132px;
    --tl-gap: 48px;
    --tl-line: calc(var(--tl-marker) + (var(--tl-gap) / 2));
  }

  .page-about .about-timeline::before {
    left: var(--tl-line);
    top: 14px;
    bottom: 14px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: var(--tl-marker) minmax(0, 1fr);
    gap: var(--tl-gap);
    padding: 0 0 clamp(36px, 4vw, 56px) 0;
  }

  .page-about .about-timeline__item::before {
    left: calc(var(--tl-line) - 7px);
    top: 8px;
  }

  .page-about .about-timeline__marker {
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    margin-bottom: 0;
    text-align: right;
  }

  .page-about .about-timeline__year {
    font-size: clamp(24px, 2.4vw, 30px);
  }

  .page-about .about-timeline__body h3 {
    margin-top: -4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-route__path {
    animation: none;
    stroke-dashoffset: 0;
  }

  .page-about .about-slices__item,
  .page-about .about-slices__item::before,
  .page-about .about-jump a {
    transition: none;
  }
}
<<<END>>>