.page-about {
  --about-gap: clamp(1.5rem, 4vw, 3rem);
  --about-line: 2px solid var(--hair-strong);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(1.5rem, 4vw, 2.5rem);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(139, 92, 246, 0.34) 0%, rgba(139, 92, 246, 0) 62%),
    radial-gradient(80% 70% at 4% 96%, rgba(34, 211, 238, 0.16) 0%, rgba(34, 211, 238, 0) 66%),
    var(--deep);
  border-bottom: 2px solid var(--hair-strong);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -38%;
  width: 62%;
  aspect-ratio: 1;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.24), rgba(139, 92, 246, 0.1) 60%, transparent);
  transform: rotate(-16deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.5rem);
}

.page-about .about-hero__copy {
  max-width: 46rem;
}

.page-about .about-hero h1 {
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 6.6vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
  color: var(--star);
}

.page-about .about-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 40rem;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__jump a {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border: 1px solid rgba(34, 211, 238, 0.4);
  border-radius: 2px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-hero__jump a:hover,
.page-about .about-hero__jump a:focus-visible {
  background: var(--cyan);
  color: var(--deep);
  transform: translateY(-2px);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hair-strong);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: clamp(0.9rem, 2.5vw, 1.35rem);
  background: var(--navy);
}

.page-about .about-stat__num {
  font-size: clamp(1.75rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--star);
}

.page-about .about-stat__num small {
  font-size: 0.5em;
  margin-left: 0.15em;
  color: var(--cyan);
}

.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-hero__figure {
  margin: clamp(1.5rem, 4vw, 2.75rem) 0 0;
}

/* 时间轴 */
.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-rail__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 4.6vw, 2.6rem);
  line-height: 1.08;
  color: var(--star);
}

.page-about .about-rail__note {
  margin: 0.9rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-timeline__years {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__years a {
  display: inline-block;
  padding: 0.3rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid var(--hair-strong);
  border-radius: 2px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-timeline__years a:hover,
.page-about .about-timeline__years a:focus-visible {
  border-color: var(--nebula);
  color: var(--nebula);
}

.page-about .about-timeline__nodes {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.35rem;
  list-style: none;
  border-left: 2px solid rgba(139, 92, 246, 0.42);
}

.page-about .about-node {
  position: relative;
  padding-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-node:last-child {
  padding-bottom: 0;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(-1.35rem - 7px);
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.14);
}

.page-about .about-node--current::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 26, 0.2);
}

.page-about .about-node__year {
  margin: 0 0 0.45rem;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-node--current .about-node__year {
  color: var(--orange);
}

.page-about .about-node__body {
  padding: clamp(0.9rem, 2.5vw, 1.35rem) clamp(1rem, 3vw, 1.5rem);
  background: var(--navy);
  border: 1px solid var(--hair-strong);
  border-left: 4px solid var(--nebula);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-node--current .about-node__body {
  background: var(--navy-2);
  border-left-color: var(--orange);
  box-shadow: var(--shadow-hard);
}

.page-about .about-node__body:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-about .about-node__body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--star);
}

.page-about .about-node__body p {
  margin: 0.7rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-node__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

/* 数据流程 */
.page-about .about-flow__head {
  max-width: 42rem;
}

.page-about .about-flow h2,
.page-about .about-team h2,
.page-about .about-coverage h2,
.page-about .about-partners h2,
.page-about .about-next h2 {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 4.6vw, 2.7rem);
  line-height: 1.1;
  color: var(--star);
}

.page-about .about-flow__lead,
.page-about .about-coverage__lead,
.page-about .about-partners__lead {
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

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

.page-about .about-flow__steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hair-strong);
  border: 2px solid var(--ink);
}

.page-about .about-flow__steps li {
  padding: clamp(1rem, 3vw, 1.4rem);
  background: var(--navy);
}

.page-about .about-flow__step-no {
  margin: 0;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--nebula);
}

.page-about .about-flow__steps h3 {
  margin: 0.4rem 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--star);
}

.page-about .about-flow__steps p {
  margin: 0.55rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flow__band {
  display: grid;
  gap: 1px;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--hair-strong);
  border-top: 2px solid var(--nebula);
  border-bottom: 2px solid var(--nebula);
}

.page-about .about-flow__band li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.9rem 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-about .about-flow__band .numeric {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-flow__unit {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2rem);
  align-items: start;
}

.page-about .about-team__paper {
  padding: clamp(1.25rem, 4vw, 2.25rem);
  color: var(--ink);
}

.page-about .about-team__paper h2 {
  color: var(--ink);
}

.page-about .about-team__eyebrow {
  color: var(--nebula-deep);
}

.page-about .about-team__paper > p {
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: #23262e;
}

.page-about .about-team__list {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num role"
    "num desc";
  gap: 0.15rem 0.85rem;
  padding: 0.7rem 0;
  border-top: 2px solid rgba(10, 10, 10, 0.14);
}

.page-about .about-team__num {
  grid-area: num;
  align-self: center;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--nebula-deep);
}

.page-about .about-team__role {
  grid-area: role;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-team__desc {
  grid-area: desc;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #4a4f5c;
}

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

/* 覆盖范围 */
.page-about .about-coverage__rail {
  margin-top: clamp(1.25rem, 3.5vw, 2rem);
  overflow-x: auto;
  padding-bottom: 0.75rem;
  border-top: 2px solid var(--hair-strong);
  border-bottom: 2px solid var(--hair-strong);
  scrollbar-color: var(--nebula) transparent;
}

.page-about .about-coverage__rail:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-coverage__chips {
  display: flex;
  gap: 0.55rem;
  width: max-content;
  margin: 0;
  padding: 0.9rem 0.1rem;
  list-style: none;
}

.page-about .about-chip {
  padding: 0.45rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  white-space: nowrap;
  color: var(--paper);
  background: var(--navy);
  border: 1px solid var(--hair-strong);
  border-radius: 2px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-chip:hover {
  background: var(--nebula);
  border-color: var(--nebula);
  color: var(--star);
}

.page-about .about-coverage__cases {
  display: grid;
  gap: 1.25rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-case {
  padding: clamp(1.1rem, 3vw, 1.5rem);
  background: var(--navy);
  border: 2px solid var(--ink);
  border-top: 4px solid var(--cyan);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-case:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-case h3 {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--star);
}

.page-about .about-case p {
  margin: 0.6rem 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

/* 合作与认可 */
.page-about .about-partners__head {
  max-width: 44rem;
}

.page-about .about-partners__list {
  display: grid;
  gap: 1rem;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner {
  padding: clamp(1rem, 3vw, 1.4rem);
  border-left: 4px solid var(--nebula);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-partner:hover {
  border-left-color: var(--orange);
  transform: translateX(4px);
}

.page-about .about-partner__num {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-partner__num--text {
  font-size: clamp(1rem, 2.6vw, 1.2rem);
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-partner h3 {
  margin: 0.35rem 0 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--star);
}

.page-about .about-partner p {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* 下一步 */
.page-about .about-next__panel {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2.5rem);
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.page-about .about-next__copy > p:not(.eyebrow) {
  margin: 0.9rem 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__contact {
  padding: clamp(1rem, 3vw, 1.4rem);
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-paper);
  color: var(--ink);
}

.page-about .about-next__contact p {
  margin: 0.5rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-next__contact .data-label {
  margin: 0;
  color: var(--nebula-deep);
}

.page-about .about-next__contact a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-next__contact a:hover,
.page-about .about-next__contact a:focus-visible {
  color: var(--nebula-deep);
}

.page-about .about-next__note {
  margin-top: 0.9rem !important;
  padding-top: 0.75rem;
  border-top: 2px solid rgba(10, 10, 10, 0.14);
  font-size: 0.8125rem !important;
  color: #4a4f5c;
}

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

  .page-about .about-flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow__band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow__band li {
    justify-content: center;
    padding: 1.1rem 0.5rem;
  }

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

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

@media (min-width: 1024px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
  }

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

  .page-about .about-timeline__grid {
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 2rem;
  }

  .page-about .about-timeline__years {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-coverage__cases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }
}
<<<PAGE_CSS_END>>>