.page-about {
  --about-axis: 200px;
  position: relative;
  overflow-x: hidden;
  background: var(--pg-bg);
  color: var(--pg-text);
  font-family: var(--pg-font);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(124, 92, 255, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(124, 92, 255, .07) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), rgba(0, 0, 0, .35) 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), rgba(0, 0, 0, .35) 70%, transparent 100%);
}

.page-about::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(120% 55% at 50% 0%, rgba(124, 92, 255, .18), transparent 62%);
}

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

/* ---------- 面包屑 ---------- */
.page-about .pg-crumb {
  margin-bottom: 30px;
}

.page-about .pg-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--pg-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--pg-muted);
}

.page-about .pg-crumb__sep {
  color: var(--pg-line);
}

.page-about .pg-crumb__current {
  color: var(--pg-gold);
}

/* ---------- 通用小标题 ---------- */
.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--pg-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--pg-muted);
}

.page-about .about-kicker__num {
  color: var(--pg-gold);
  font-size: 13px;
  font-weight: 700;
}

.page-about .about-sec-head {
  max-width: 780px;
  margin-bottom: 44px;
}

.page-about .about-sec-head__lead {
  margin-top: 16px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 40px;
}

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

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 720px;
}

.page-about .about-hero__media {
  margin: 40px 0 0;
}

/* ---------- 媒体容器 ---------- */
.page-about .about-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--pg-line);
  background: var(--pg-panel);
  box-shadow: 3px 3px 0 rgba(21, 18, 56, .9);
}

.page-about .about-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__media img {
  aspect-ratio: 2 / 1;
}

.page-about .about-node__media img {
  aspect-ratio: 16 / 9;
}

.page-about .about-team__media img {
  aspect-ratio: 5 / 3;
}

/* ---------- 会馆做什么 ---------- */
.page-about .about-what__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-what__card {
  padding: 26px 24px 28px;
}

.page-about .about-what__title {
  margin: 12px 0 12px;
}

/* ---------- 十年节点 ---------- */
.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-node {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding-bottom: 44px;
}

.page-about .about-node__axis {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-node__dot {
  flex: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--pg-cyan);
  box-shadow: 0 0 0 4px rgba(34, 227, 210, .13);
}

.page-about .about-node--n5 .about-node__dot,
.page-about .about-node--n6 .about-node__dot {
  background: var(--pg-orange);
  box-shadow: 0 0 0 4px rgba(255, 154, 60, .15);
}

.page-about .about-node__year {
  font-family: var(--pg-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--pg-text);
}

.page-about .about-node__meta {
  font-family: var(--pg-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--pg-muted);
}

.page-about .about-node__card {
  padding: 24px 22px 24px;
  transition: transform .18s var(--pg-ease), border-color .18s var(--pg-ease);
}

.page-about .about-node__card:hover,
.page-about .about-node__card:focus-within {
  transform: translateY(-4px);
  border-color: var(--pg-orange);
}

.page-about .about-node__title {
  margin: 12px 0 12px;
  font-size: 21px;
  line-height: 1.45;
  letter-spacing: -.01em;
}

.page-about .about-node__more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .22s var(--pg-ease), opacity .22s var(--pg-ease), margin-top .22s var(--pg-ease);
}

.page-about .about-node:hover .about-node__more,
.page-about .about-node:focus-within .about-node__more {
  max-height: 14em;
  opacity: 1;
  margin-top: 12px;
}

.page-about .about-node__more .pg-text {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--pg-line);
  font-size: 15px;
}

.page-about .about-node__media {
  margin-top: 22px;
}

/* ---------- 服务规模 ---------- */
.page-about .about-meters {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--pg-line);
}

.page-about .about-meter {
  display: grid;
  gap: 12px;
  padding: 26px 0;
  border-bottom: 1px solid var(--pg-line);
}

.page-about .about-meter__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.page-about .about-meter__label {
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--pg-muted);
}

.page-about .about-meter__value {
  font-family: var(--pg-mono);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--pg-cyan);
  line-height: 1.1;
}

.page-about .about-meter--team .about-meter__value {
  color: var(--pg-violet);
}

.page-about .about-meter__track {
  position: relative;
  height: 4px;
  background: var(--pg-line);
  overflow: hidden;
}

.page-about .about-meter__fill {
  display: block;
  height: 100%;
  width: var(--meter-w, 50%);
  background: linear-gradient(90deg, var(--pg-cyan), var(--pg-violet));
}

.page-about .about-meter--team .about-meter__fill {
  background: linear-gradient(90deg, var(--pg-violet), var(--pg-orange));
}

.page-about .about-meter--users .about-meter__fill { --meter-w: 92%; }
.page-about .about-meter--regions .about-meter__fill { --meter-w: 66%; }
.page-about .about-meter--mobile .about-meter__fill { --meter-w: 83%; }
.page-about .about-meter--team .about-meter__fill { --meter-w: 30%; }

.page-about .about-meter__note {
  margin: 0;
  max-width: 720px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--pg-muted);
}

/* ---------- 订阅体系 ---------- */
.page-about .about-sub__grid {
  display: grid;
  gap: 40px;
}

.page-about .about-sub__link {
  margin: 24px 0 0;
}

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

.page-about .about-sub__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--pg-line);
  transition: border-color .18s var(--pg-ease);
}

.page-about .about-sub__item:hover {
  border-color: var(--pg-cyan);
}

.page-about .about-sub__tag {
  margin: 0;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--pg-muted);
}

.page-about .about-sub__figure {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
}

.page-about .about-sub__num {
  font-family: var(--pg-mono);
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--pg-cyan);
  line-height: 1;
}

.page-about .about-sub__unit {
  font-size: 14px;
  color: var(--pg-muted);
}

.page-about .about-sub__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--pg-text);
}

/* ---------- 团队与协作 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 40px;
}

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

.page-about .about-role {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--pg-line);
}

.page-about .about-role__name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--pg-text);
}

.page-about .about-role__meta {
  margin: 6px 0 0;
  font-family: var(--pg-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--pg-cyan);
}

.page-about .about-role__body .pg-text {
  margin: 0;
}

/* ---------- 三个场景 ---------- */
.page-about .about-scenes {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--pg-line);
}

.page-about .about-scene {
  padding: 28px 0;
  border-bottom: 1px solid var(--pg-line);
}

.page-about .about-scene__num {
  margin: 0 0 12px;
  font-family: var(--pg-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--pg-gold);
}

.page-about .about-scene .pg-h3 {
  margin: 0 0 12px;
}

.page-about .about-scene__result {
  margin: 16px 0 0;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.7;
  color: var(--pg-cyan);
}

/* ---------- 接着看 ---------- */
.page-about .about-next__title {
  margin-bottom: 28px;
}

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

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 0;
  border-bottom: 1px solid var(--pg-line);
  color: var(--pg-text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  transition: color .16s var(--pg-ease), padding-left .16s var(--pg-ease), border-color .16s var(--pg-ease);
}

.page-about .about-next__link span {
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--pg-muted);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--pg-cyan);
  padding-left: 8px;
  border-color: var(--pg-cyan);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .about-what__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-role {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-sub__item {
    grid-template-columns: 84px 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

  .page-about .about-hero__media {
    margin-top: 60px;
  }

  .page-about .about-sec-head {
    margin-bottom: 64px;
  }

  .page-about .about-node {
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    gap: 56px;
    padding-bottom: 64px;
  }

  .page-about .about-node__axis {
    display: block;
    position: relative;
    padding-left: 26px;
    padding-top: 6px;
  }

  .page-about .about-node__axis::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 24px;
    bottom: -64px;
    width: 1px;
    background: linear-gradient(180deg, var(--pg-line), rgba(42, 39, 88, 0));
  }

  .page-about .about-node:last-child .about-node__axis::after {
    display: none;
  }

  .page-about .about-node__dot {
    position: absolute;
    left: 0;
    top: 6px;
  }

  .page-about .about-node__year {
    display: block;
    font-size: 22px;
  }

  .page-about .about-node__meta {
    display: block;
    margin-top: 6px;
  }

  .page-about .about-node__card {
    padding: 32px 36px 30px;
  }

  .page-about .about-node__title {
    font-size: 23px;
  }

  .page-about .about-node--n1 .about-node__card { width: 62%; }
  .page-about .about-node--n2 .about-node__card { width: 68%; }
  .page-about .about-node--n3 .about-node__card { width: 74%; }
  .page-about .about-node--n4 .about-node__card { width: 80%; }
  .page-about .about-node--n5 .about-node__card { width: 90%; }
  .page-about .about-node--n6 .about-node__card { width: 100%; }

  .page-about .about-sub__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    gap: 56px;
    align-items: start;
  }

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

  .page-about .about-scene {
    padding: 34px 32px 34px 0;
    border-bottom: 0;
    border-right: 1px solid var(--pg-line);
  }

  .page-about .about-scene + .about-scene {
    padding-left: 32px;
  }

  .page-about .about-scene:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .page-about .about-next__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 520px) {
  .page-about .about-hero {
    padding-top: 28px;
  }

  .page-about .about-node__card {
    padding: 22px 18px;
  }

  .page-about .about-node__title {
    font-size: 19px;
  }

  .page-about .about-meter__value {
    font-size: 28px;
  }

  .page-about .about-sub__num {
    font-size: 34px;
  }

  .page-about .about-next__link {
    font-size: 17px;
  }
}

/* ---------- 无悬停设备 ---------- */
@media (hover: none) {
  .page-about .about-node__more {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }

  .page-about .about-node__card:hover {
    transform: none;
  }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__card,
  .page-about .about-node__more,
  .page-about .about-sub__item,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-node__card:hover {
    transform: none;
  }
}
<<<END>>>