.page-about {
  --about-rail: 218px;
  --about-gap: clamp(1.5rem, 4vw, 3.25rem);
  --about-measure: 36ch;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2.5rem, 7vw, 5rem);
  background:
    radial-gradient(110% 85% at 86% -10%, rgba(111, 75, 216, 0.30), transparent 62%),
    radial-gradient(70% 60% at 2% 106%, rgba(53, 224, 214, 0.13), transparent 62%);
}

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

.page-about .about-hero__orbit {
  position: absolute;
  right: -18vw;
  bottom: -32vw;
  width: 62vw;
  height: 62vw;
  max-width: 720px;
  max-height: 720px;
  border-radius: 50%;
  border: 1px solid rgba(53, 224, 214, 0.20);
  box-shadow: inset 0 0 90px rgba(111, 75, 216, 0.20);
  animation: about-spin 140s linear infinite;
  pointer-events: none;
}

.page-about .about-hero__orbit::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 42%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pulse);
  box-shadow: var(--glow-pulse);
}

@keyframes about-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.page-about .about-hero__title {
  margin: 0.85rem 0 0;
  font-size: clamp(2.05rem, 7.6vw, 4.1rem);
  line-height: 1.08;
  letter-spacing: 0.015em;
  color: var(--stardust);
  text-shadow: 0 0 32px rgba(111, 75, 216, 0.38), 0 0 60px rgba(53, 224, 214, 0.14);
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin-top: 1.35rem;
  max-width: 44ch;
  color: var(--grey);
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

.page-about .about-fact {
  border-left: 1px solid var(--orbit);
  padding-left: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .about-fact__num {
  font-size: clamp(1.35rem, 4.4vw, 1.85rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--stardust);
}

.page-about .about-fact__label {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--grey);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-about .about-rail {
  display: block;
}

.page-about .about-toc .toc__title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--grey);
  text-transform: uppercase;
}

.page-about .about-toc .toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}

.page-about .about-toc__link {
  font-size: 0.86rem;
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--stardust);
  border-bottom-color: var(--purple);
}

.page-about .about-toc__link.is-active {
  color: var(--pulse);
  border-bottom-color: var(--pulse);
}

.page-about .about-stream {
  min-width: 0;
}

.page-about .about-block {
  scroll-margin-top: 6.5rem;
}

.page-about .divider-orbit {
  margin: clamp(2rem, 6vw, 3.5rem) 0;
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-top: 1.75rem;
}

.page-about .about-split__text p {
  margin-top: 0;
}

.page-about .about-split__text p + p {
  margin-top: 1rem;
}

.page-about .about-split__media,
.page-about .about-wide-media {
  margin: 0;
}

.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  background: linear-gradient(140deg, rgba(20, 27, 58, 0.9), rgba(5, 7, 15, 0.9));
}

.page-about .about-wide-media {
  margin-top: 1.9rem;
}

.page-about .media__caption {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 4px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, rgba(53, 224, 214, 0.55), rgba(111, 75, 216, 0.5), rgba(42, 53, 102, 0.15));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 2rem 2.15rem;
}

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

.page-about .about-timeline__node {
  position: absolute;
  left: 0;
  top: 0.4rem;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--void);
  border: 1px solid var(--orbit);
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}

.page-about .about-timeline__item.is-visible .about-timeline__node {
  background: var(--pulse);
  border-color: var(--pulse);
  box-shadow: var(--glow-pulse);
}

.page-about .about-timeline__ver {
  margin: 0;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--purple);
}

.page-about .about-timeline__item.is-visible .about-timeline__ver {
  color: var(--pulse);
}

.page-about .about-timeline__title {
  margin: 0.35rem 0 0;
  font-size: 1.12rem;
  color: var(--stardust);
}

.page-about .about-timeline__text {
  margin: 0.5rem 0 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--grey);
  max-width: 46ch;
}

.page-about .about-inline-cta {
  margin: 1.75rem 0 0;
  font-size: 0.92rem;
  color: var(--grey);
}

.page-about .about-inline-cta .link-btn {
  color: var(--amber);
}

/* ---------- 服务板块 ---------- */
.page-about .about-scope {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-scope__item {
  border-left: 2px solid rgba(111, 75, 216, 0.55);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-scope__item:hover {
  border-left-color: var(--pulse);
  transform: translateX(3px);
}

.page-about .about-scope__item .card__index {
  color: var(--pulse);
  letter-spacing: 0.12em;
}

.page-about .about-columns {
  margin-top: clamp(2rem, 5vw, 2.75rem);
  padding-top: 1.6rem;
  border-top: var(--line-soft);
}

.page-about .about-columns__title {
  margin: 0;
  font-size: 1.02rem;
  color: var(--stardust);
}

.page-about .about-columns__list {
  list-style: none;
  margin: 1.15rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
}

.page-about .about-column {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-left: 0.85rem;
  border-left: 1px solid var(--orbit);
}

.page-about .about-column__name {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--stardust);
}

.page-about .about-column__desc {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--grey);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-team__stat {
  background: linear-gradient(150deg, rgba(20, 27, 58, 0.85), rgba(11, 16, 36, 0.85));
  border: var(--line-soft);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem;
}

.page-about .about-team__stat .stat__value {
  display: block;
  font-size: clamp(1.9rem, 6vw, 2.5rem);
  font-weight: 700;
  color: var(--stardust);
  line-height: 1.1;
}

.page-about .about-team__stat .stat__label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--grey);
}

.page-about .about-team__note {
  margin-top: 1.5rem;
}

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

/* ---------- 区域 ---------- */
.page-about .about-cities {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-cities li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--pulse);
  border: 1px solid rgba(53, 224, 214, 0.35);
  border-radius: 999px;
  padding: 0.32rem 0.85rem;
  background: rgba(53, 224, 214, 0.06);
}

/* ---------- 认证与荣誉 ---------- */
.page-about .about-badges {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .about-badge {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 100%;
  padding: 0.65rem 1.1rem;
  border: var(--line-soft);
  border-radius: 999px;
  background: rgba(20, 27, 58, 0.6);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-badge:hover,
.page-about .about-badge:focus-within {
  border-color: rgba(255, 194, 75, 0.55);
  background: rgba(20, 27, 58, 0.9);
}

.page-about .about-badge__name {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--stardust);
}

.page-about .about-badge__desc {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .about-trust__note {
  margin-top: 1.75rem;
}

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

/* ---------- 落地行动 ---------- */
.page-about .about-launch {
  margin-top: clamp(2.5rem, 7vw, 4rem);
  border: var(--line-soft);
  border-radius: var(--radius-l);
  padding: clamp(1.6rem, 5vw, 2.75rem);
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(255, 194, 75, 0.14), transparent 58%),
    linear-gradient(135deg, rgba(111, 75, 216, 0.26), rgba(11, 16, 36, 0.94) 52%, rgba(53, 224, 214, 0.10));
}

.page-about .about-launch__title {
  margin: 0;
  font-size: clamp(1.4rem, 4.6vw, 2rem);
  color: var(--stardust);
}

.page-about .about-launch__text {
  margin: 0.85rem 0 0;
  max-width: 46ch;
  color: var(--grey);
  line-height: 1.85;
}

.page-about .about-launch__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .about-launch__meta {
  margin: 1.35rem 0 0;
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--grey);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-columns__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem 1.5rem;
  }

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

@media (min-width: 900px) {
  .page-about .about-scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem;
  }

  .page-about .about-scope__item:last-child {
    grid-column: 1 / -1;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    align-items: start;
    gap: 2.5rem;
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 4fr) minmax(0, 5fr);
  }

  .page-about .about-split--reverse .about-split__media {
    order: -1;
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }

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

  .page-about .about-toc {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

  .page-about .about-toc .toc__list {
    flex-direction: column;
    gap: 0.15rem;
  }

  .page-about .about-toc__link {
    display: block;
    padding: 0.4rem 0 0.4rem 0.85rem;
    border-left: 1px solid var(--orbit);
    border-bottom: none;
    font-size: 0.85rem;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    border-left-color: var(--purple);
  }

  .page-about .about-toc__link.is-active {
    border-left-color: var(--pulse);
    border-bottom: none;
  }
}

@media (hover: hover) and (min-width: 980px) {
  .page-about .about-badge__desc {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease), opacity 0.35s var(--ease);
  }

  .page-about .about-badge:hover .about-badge__desc,
  .page-about .about-badge:focus-within .about-badge__desc {
    max-height: 4rem;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__orbit {
    animation: none;
  }

  .page-about .about-scope__item,
  .page-about .about-timeline__node,
  .page-about .about-badge {
    transition: none;
  }
}
<<<END>>>