.page-about {
  display: block;
  overflow-x: clip;
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  padding: clamp(40px, 7vw, 96px) 0 clamp(48px, 8vw, 104px);
  border-bottom: 1px solid var(--c-line-faint);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: min(680px, 78vw);
  height: min(680px, 78vw);
  background: radial-gradient(circle at 50% 50%, rgba(107, 75, 255, .30), rgba(56, 242, 222, .07) 46%, transparent 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-cover__inner {
  position: relative;
  z-index: 1;
  max-width: 1000px;
}

.page-about .about-cover__title {
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 74px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--c-white);
  margin: 16px 0 24px;
}

.page-about .about-cover__lede {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--c-silver);
  max-width: 36em;
  margin: 0;
}

.page-about .about-cover__facts {
  list-style: none;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: clamp(22px, 3vw, 32px) 0 0;
  border-top: 1px solid var(--c-line-faint);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
}

.page-about .about-cover__fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-cover__fact .stat__value {
  font-family: var(--f-mono);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-white);
}

.page-about .about-cover__fact .stat__label {
  font-size: var(--fs-12);
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--c-silver);
  opacity: .82;
}

@media (min-width: 780px) {
  .page-about .about-cover__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px 32px;
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-block {
  padding: clamp(52px, 8vw, 112px) 0;
  position: relative;
}

.page-about .about-block--nebula {
  background: linear-gradient(180deg, rgba(25, 17, 64, 0) 0%, rgba(25, 17, 64, .82) 18%, rgba(25, 17, 64, .82) 82%, rgba(25, 17, 64, 0) 100%);
}

.page-about .about-block--quiet {
  background: linear-gradient(180deg, transparent, rgba(11, 42, 91, .30) 30%, rgba(11, 42, 91, .30) 70%, transparent);
}

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

.page-about .about-block__rail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-mono);
  font-size: var(--fs-14);
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-about .about-block__rule {
  display: block;
  width: 44px;
  height: 1px;
  background: var(--c-line-soft);
}

@media (min-width: 900px) {
  .page-about .about-block__grid {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 0 44px;
  }

  .page-about .about-block__rail {
    position: sticky;
    top: 150px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    height: fit-content;
    padding-top: 8px;
  }

  .page-about .about-block__rule {
    width: 1px;
    height: 84px;
    background: linear-gradient(180deg, var(--c-line-soft), transparent);
  }
}

.page-about .about-h2 {
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(26px, 3.8vw, 46px);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--c-white);
  margin: 0 0 20px;
}

.page-about .about-p {
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--c-silver);
  margin: 0 0 16px;
  max-width: 36em;
}

.page-about .about-p--wide {
  max-width: 42em;
  color: var(--c-silver);
}

.page-about .about-p--after {
  margin-top: 30px;
}

/* ---------- 分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

@media (min-width: 1040px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }
}

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

.page-about .about-aside__title {
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--c-white);
  margin: 0 0 14px;
}

.page-about .about-mini {
  list-style: none;
  margin: 0;
  padding: 22px 20px;
  border-radius: var(--r-md);
  background: var(--c-glass);
  border: 1px solid var(--c-line-soft);
}

.page-about .about-mini__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-line-faint);
}

.page-about .about-mini__item:first-child {
  padding-top: 0;
}

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

.page-about .about-mini__k {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--c-white);
}

.page-about .about-mini__v {
  font-family: var(--f-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--c-cyan);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 34px 0 0;
}

.page-about .about-figure--inline {
  margin-top: 40px;
}

.page-about .about-figure .media {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-line-soft);
}

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

.page-about .media--square img {
  aspect-ratio: 3 / 2;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  display: flex;
  gap: 26px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 4px 0 26px;
  margin: 26px -4px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--c-line-soft) transparent;
}

.page-about .about-timeline::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-timeline::-webkit-scrollbar-thumb {
  background: var(--c-line-soft);
  border-radius: 999px;
}

.page-about .about-node {
  position: relative;
  flex: 0 0 min(298px, 76vw);
  scroll-snap-align: start;
  padding: 30px 4px 6px;
  border-top: 1px solid var(--c-line-soft);
  transition: border-color .35s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  border-top-color: var(--c-cyan);
  outline: none;
}

.page-about .about-node__dot {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-stand);
  border: 1px solid var(--c-cyan);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-node:hover .about-node__dot,
.page-about .about-node:focus-within .about-node__dot {
  background: var(--c-cyan);
  box-shadow: 0 0 14px rgba(56, 242, 222, .68);
}

.page-about .about-node__version {
  font-family: var(--f-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--c-violet);
  margin: 0 0 10px;
}

.page-about .about-node__title {
  font-size: var(--fs-22);
  font-weight: 700;
  line-height: 1.26;
  color: var(--c-white);
  margin: 0 0 12px;
}

.page-about .about-node__text {
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--c-silver);
  margin: 0;
}

.page-about .about-node__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--c-cyan);
  transition: max-height .4s var(--ease), opacity .3s var(--ease), margin .4s var(--ease);
}

.page-about .about-node:hover .about-node__more,
.page-about .about-node:focus-within .about-node__more {
  max-height: 140px;
  opacity: 1;
  margin: 12px 0 0;
}

/* ---------- 团队刻度条 ---------- */
.page-about .about-roster {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
  max-width: 620px;
}

.page-about .about-roster__row {
  display: grid;
  gap: 10px;
}

.page-about .about-roster__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-roster__name {
  font-size: var(--fs-16);
  color: var(--c-silver);
}

.page-about .about-roster__num {
  font-family: var(--f-mono);
  font-size: var(--fs-18);
  color: var(--c-white);
}

.page-about .about-roster__track {
  height: 4px;
  border-radius: 999px;
  background: var(--c-line-faint);
  overflow: hidden;
}

.page-about .about-roster__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--c-violet), var(--c-cyan));
}

.page-about .about-roster__fill--a { width: 61%; }
.page-about .about-roster__fill--b { width: 26%; }
.page-about .about-roster__fill--c { width: 13%; }

/* ---------- 数据流玻璃卡 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

@media (min-width: 620px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-flow__card {
  padding: 22px 20px 24px;
  border-radius: var(--r-md);
  background: var(--c-glass);
  border: 1px solid var(--c-line-soft);
  transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-flow__card:hover {
  background: var(--c-glass-2);
  border-color: var(--c-cyan);
  transform: translateY(-4px);
}

.page-about .about-flow__idx {
  display: block;
  font-family: var(--f-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--c-cyan);
  margin-bottom: 14px;
}

.page-about .about-flow__title {
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--c-white);
  margin: 0 0 8px;
}

.page-about .about-flow__text {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--c-silver);
  margin: 0;
}

/* ---------- 服务准则 ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  max-width: 780px;
}

.page-about .about-rules__item {
  position: relative;
  padding: 22px 0 22px 24px;
  border-bottom: 1px solid var(--c-line-faint);
}

.page-about .about-rules__item:first-child {
  border-top: 1px solid var(--c-line-faint);
}

.page-about .about-rules__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--c-cyan);
  opacity: .2;
  transform: scaleY(.45);
  transform-origin: top center;
  transition: opacity .3s var(--ease), transform .35s var(--ease);
}

.page-about .about-rules__item:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

.page-about .about-rules__title {
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--c-white);
  margin: 0 0 6px;
}

.page-about .about-rules__text {
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--c-silver);
  margin: 0;
  max-width: 40em;
}

/* ---------- 西安夜 ---------- */
.page-about .about-night {
  padding: clamp(30px, 5vw, 62px);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(25, 17, 64, .95) 0%, rgba(11, 42, 91, .85) 100%);
  border: 1px solid var(--c-line-soft);
}

.page-about .about-night__quote {
  font-family: var(--f-head);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.34;
  letter-spacing: -.01em;
  color: var(--c-cyan);
  margin: 0 0 24px;
  max-width: 22em;
}

.page-about .about-night__p {
  max-width: 40em;
  margin-bottom: 14px;
}

.page-about .about-night__p:last-child {
  margin-bottom: 0;
}

/* ---------- 尾部落点 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(30px, 4vw, 44px);
}

.page-about .about-links {
  list-style: none;
  margin: 32px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--c-line-faint);
  display: grid;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-about .about-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 40px;
  }
}
<<<END>>>