.page-about {
  --about-hairline: rgba(143, 166, 216, 0.16);
  --about-soft-orange: rgba(255, 106, 26, 0.1);
  --about-soft-green: rgba(76, 255, 158, 0.14);
  background: var(--blue-deep);
  color: var(--white-cool);
  font-family: var(--font-sans);
  padding-bottom: 96px;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  width: var(--shell);
  margin: 26px auto 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--blue-mist);
}

.page-about .breadcrumbs a {
  color: var(--blue-mist);
  text-decoration: none;
  transition: color 200ms var(--ease-out);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--orange);
}

.page-about .breadcrumbs__sep {
  opacity: 0.45;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  width: var(--shell);
  margin: 44px auto 0;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(34px, 8vw, 84px);
  font-weight: 250;
  line-height: 1.04;
  letter-spacing: -0.03em;
  max-width: 17ch;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--blue-mist);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--about-hairline);
  display: flex;
  flex-wrap: wrap;
  gap: 20px 36px;
}

.page-about .about-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--blue-mist);
}

.page-about .about-hero__stats .data-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  color: var(--orange);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-about .about-hero__stat-label {
  white-space: nowrap;
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  width: var(--shell);
  margin: 88px auto 0;
}

.page-about .section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 36px;
}

.page-about .section-head__title {
  margin: 0;
  font-weight: 650;
  line-height: 1.24;
  letter-spacing: -0.015em;
}

.page-about .section-head__lead {
  margin: 12px 0 0;
  max-width: 38ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--blue-mist);
}

.page-about .prose {
  margin: 0 0 34px;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--blue-mist);
}

/* ---------- 01 我们在做什么 ---------- */
.page-about .about-doing__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hairline);
}

.page-about .about-doing__list li {
  padding: 22px 0;
  border-bottom: 1px solid var(--about-hairline);
  transition: padding-left 260ms var(--ease-out), background-color 260ms var(--ease-out);
}

.page-about .about-doing__list li:hover {
  padding-left: 12px;
  background: linear-gradient(90deg, var(--about-soft-orange), transparent 72%);
}

.page-about .about-doing__list h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--white-cool);
}

.page-about .about-doing__list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--blue-mist);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
}

.page-about .about-timeline__art {
  display: none;
  margin: 0;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, rgba(255, 106, 26, 0.28) 55%, rgba(76, 255, 158, 0.25) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 44px 34px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--blue-deep);
  border: 2px solid var(--green-neon);
  box-shadow: 0 0 0 4px var(--about-soft-green);
}

.page-about .timeline__stage {
  margin: 0 0 8px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--blue-mist);
}

.page-about .timeline__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__item h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--white-cool);
}

.page-about .timeline__item p:last-child {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--blue-mist);
}

/* ---------- 03 内容团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 28px;
  aspect-ratio: 3 / 2;
}

.page-about .about-team__groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__group {
  background: var(--blue-night);
  border: 1px solid var(--blue-line);
  border-radius: var(--radius-card);
  padding: 24px 22px 26px;
  position: relative;
  overflow: hidden;
}

.page-about .about-team__group::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--about-soft-orange) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-team__group-index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-team__group h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 650;
  color: var(--white-cool);
}

.page-about .about-team__group p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--blue-mist);
}

.page-about .about-team__aside {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-team__figure2 {
  margin: 0;
  aspect-ratio: 3 / 2;
}

.page-about .about-team__aside-text h3 {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 650;
  color: var(--white-cool);
}

.page-about .about-team__aside-text p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--blue-mist);
}

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

/* ---------- 04 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-partners__item {
  border-left: 2px solid var(--orange);
  padding: 6px 0 6px 20px;
}

.page-about .about-partners__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(44px, 9vw, 76px);
  font-weight: 300;
  line-height: 1;
  color: var(--white-cool);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-partners__item h3 {
  margin: 10px 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--orange-soft);
  letter-spacing: 0.01em;
}

.page-about .about-partners__item p:last-child {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--blue-mist);
}

/* ---------- 05 能力矩阵 ---------- */
.page-about .matrix {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hairline);
}

.page-about .matrix__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 6px;
  border-bottom: 1px solid var(--about-hairline);
  transition: padding-left 260ms var(--ease-out), background-color 260ms var(--ease-out);
}

.page-about .matrix__row:hover {
  padding-left: 16px;
  background: linear-gradient(90deg, var(--about-soft-orange), transparent 70%);
}

.page-about .matrix__key {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .matrix__val {
  font-size: 15px;
  line-height: 1.72;
  color: var(--blue-mist);
}

.page-about .about-honor {
  margin-top: 36px;
  padding: 28px 24px;
  border: 1px solid var(--about-soft-green);
  border-radius: var(--radius-card);
  background: linear-gradient(140deg, rgba(76, 255, 158, 0.09) 0%, rgba(16, 31, 69, 0.92) 62%);
  display: grid;
  gap: 14px;
  justify-items: start;
}

.page-about .about-honor p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--blue-mist);
}

/* ---------- 尾声 ---------- */
.page-about .about-outro {
  width: var(--shell);
  margin: 88px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--about-hairline);
}

.page-about .about-outro h2 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 650;
  letter-spacing: -0.015em;
}

.page-about .about-outro p {
  margin: 0 0 24px;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--blue-mist);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .section-head {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-doing__list li {
    display: grid;
    grid-template-columns: minmax(0, 210px) minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }

  .page-about .about-doing__list h3 {
    margin-bottom: 0;
  }

  .page-about .matrix__row {
    grid-template-columns: minmax(0, 230px) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-about .about-team__aside {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-about .about-team__groups {
    grid-template-columns: 1.12fr 1fr 0.88fr;
    gap: 20px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .timeline__item {
    padding-left: 44px;
  }

  .page-about .timeline__item h3 {
    font-size: 23px;
    max-width: 24ch;
  }

  .page-about .about-hero__stats {
    gap: 24px 52px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-section {
    margin-top: 104px;
  }

  .page-about .about-timeline__art {
    display: block;
    position: absolute;
    top: -8px;
    right: 0;
    width: 240px;
    opacity: 0.62;
    pointer-events: none;
  }

  .page-about .timeline {
    max-width: 700px;
  }

  .page-about .about-timeline .section-head {
    max-width: 720px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-doing__list li,
  .page-about .matrix__row {
    transition: background-color 200ms linear;
  }

  .page-about .about-doing__list li:hover,
  .page-about .matrix__row:hover {
    padding-left: 6px;
  }
}
<<<END>>>