.page-about {
  --about-num-l: clamp(46px, 10vw, 84px);
  --about-divider: 1px solid var(--ly-line);
  background: var(--ly-deep);
  color: var(--ly-snow);
}

.page-about [data-reveal] {
  transition: opacity .5s var(--ly-ease), transform .5s var(--ly-ease);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ly-graphite);
  border-bottom: 1px solid var(--ly-line-strong);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: .3;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(10, 35, 66, .58) 0%, rgba(7, 19, 33, .93) 72%, rgba(7, 19, 33, 1) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: 26px;
  padding-bottom: 34px;
  max-width: 980px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 7.6vw, 66px);
  line-height: 1.06;
  letter-spacing: -.015em;
  max-width: 17ch;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 44ch;
  color: var(--ly-frost);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ly-line-strong);
}

.page-about .about-hero__facts li {
  flex: 1 1 140px;
  min-width: 0;
  padding: 14px 18px 12px 0;
  border-right: 1px solid var(--ly-line);
}

.page-about .about-hero__facts li:last-child {
  border-right: 0;
}

.page-about .about-hero__k {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ly-frost);
}

.page-about .about-hero__v {
  display: block;
  margin-top: 6px;
  font-family: var(--ly-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 16px;
  font-weight: 700;
  color: var(--ly-snow);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-top: 40px;
  padding-bottom: 56px;
}

.page-about .about-aside {
  display: none;
}

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

.page-about .about-sec {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: var(--about-divider);
}

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

.page-about .about-sec__title {
  margin: 12px 0 0;
  max-width: 22ch;
  font-size: clamp(26px, 5.4vw, 42px);
  line-height: 1.18;
}

.page-about .about-sec .ly-prose {
  margin: 18px 0 0;
  max-width: 40ch;
  color: var(--ly-frost);
  line-height: 1.85;
}

.page-about .about-figure {
  margin: 30px 0 0;
  border: 1px solid var(--ly-line);
}

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

/* ---------- 章节目录 ---------- */
.page-about .about-toc {
  border-left: 1px solid var(--ly-line-strong);
  padding-left: 18px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ly-frost);
}

.page-about .about-toc .ly-toc__link {
  position: relative;
  display: block;
  padding: 8px 0 8px 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ly-frost);
  text-decoration: none;
  transition: color .22s var(--ly-ease);
}

.page-about .about-toc .ly-toc__link::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 50%;
  width: 3px;
  height: 0;
  transform: translateY(-50%);
  background: var(--ly-lime);
  transition: height .26s var(--ly-ease);
}

.page-about .about-toc .ly-toc__link:hover,
.page-about .about-toc .ly-toc__link:focus-visible {
  color: var(--ly-snow);
}

.page-about .about-toc .ly-toc__link.is-active,
.page-about .about-toc .ly-toc__link[aria-current="true"] {
  color: var(--ly-lime);
}

.page-about .about-toc .ly-toc__link.is-active::before,
.page-about .about-toc .ly-toc__link[aria-current="true"]::before {
  height: 22px;
}

/* ---------- 时间尺 ---------- */
.page-about .about-timeline {
  margin-top: 30px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
}

.page-about .about-timeline__track {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  min-width: min-content;
}

.page-about .about-timeline__node {
  position: relative;
  flex: 0 0 230px;
  padding: 26px 20px 4px 0;
  border-top: 1px solid var(--ly-line-strong);
  scroll-snap-align: start;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 10px;
  height: 10px;
  background: var(--ly-lime);
}

.page-about .about-timeline__stage {
  display: block;
  font-family: var(--ly-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ly-data);
}

.page-about .about-timeline__name {
  margin: 10px 0 0;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ly-snow);
}

.page-about .about-timeline__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ly-frost);
}

/* ---------- 内容中心分工 ---------- */
.page-about .about-team {
  margin: 30px 0 0;
  padding: 0;
  border-top: var(--about-divider);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0 18px 16px;
  border-bottom: var(--about-divider);
  border-left: 2px solid transparent;
  transition: border-left-color .22s var(--ly-ease), background-color .22s var(--ly-ease);
}

.page-about .about-team__row:hover {
  border-left-color: var(--ly-lime);
  background: rgba(18, 57, 95, .45);
}

.page-about .about-team__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ly-lime);
  letter-spacing: .02em;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ly-frost);
}

/* ---------- 数据条带 ---------- */
.page-about .about-strip {
  margin: 28px 0;
}

.page-about .about-strip__track {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-strip__item {
  flex: 0 0 196px;
  scroll-snap-align: start;
  padding: 18px 20px 6px 0;
  border-top: 2px solid var(--ly-lime);
}

.page-about .about-strip__num {
  display: block;
  font-size: clamp(28px, 5.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--ly-lime);
}

.page-about .about-strip__label {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ly-frost);
}

/* ---------- 规模卡片 ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.page-about .about-scale__card {
  position: relative;
  padding: 26px 22px 30px;
  background: var(--ly-deep-2);
  border: 1px solid var(--ly-line);
  border-top: 3px solid var(--ly-lime);
}

.page-about .about-scale__num {
  margin: 0;
  font-family: var(--ly-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--about-num-l);
  font-weight: 700;
  line-height: .92;
  letter-spacing: -.02em;
  color: var(--ly-snow);
}

.page-about .about-scale__unit {
  margin: 12px 0 0;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--ly-lime);
}

.page-about .about-scale__desc {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ly-frost);
}

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

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--ly-deep-2);
  border-top: 1px solid var(--ly-line-strong);
  border-bottom: 1px solid var(--ly-line-strong);
}

.page-about .about-cta__inner {
  padding-top: 48px;
  padding-bottom: 52px;
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.2;
}

.page-about .about-cta__lede {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ly-frost);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero__inner {
    padding-top: 34px;
    padding-bottom: 44px;
  }

  .page-about .about-team__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .page-about .about-scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .about-scale__card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .about-scale__card:nth-child(3) {
    margin-top: 68px;
  }

  .page-about .about-strip__item {
    flex-basis: 224px;
  }

  .page-about .about-timeline__node {
    flex-basis: 258px;
  }
}

/* ---------- 桌面：左侧粘性目录 ---------- */
@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 60px;
    padding-top: 64px;
    padding-bottom: 88px;
  }

  .page-about .about-aside {
    display: block;
    align-self: start;
    position: sticky;
    top: 136px;
  }

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

  .page-about .about-sec .ly-prose {
    max-width: 42ch;
  }

  .page-about .about-cta__inner {
    padding-top: 64px;
    padding-bottom: 68px;
  }

  .page-about .about-team__row {
    grid-template-columns: 148px minmax(0, 1fr);
  }
}
<<<END>>>