.page-about .about-hero {
  display: grid;
  gap: 30px;
  margin-top: 20px;
  padding-top: 26px;
  border-top: 1px solid var(--rule);
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.16em;
  color: var(--sand-gold);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  color: var(--ink-blue);
}

.page-about .lede {
  margin: 0;
  color: var(--ink-grey);
  line-height: 1.9;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 38px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-fact dt {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--press-blue);
}

.page-about .about-fact dd {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--ink-grey);
}

.page-about .about-fact__num {
  margin-right: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  color: var(--ink-blue);
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rule-strong);
}

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

.page-about .about-figure--wide img {
  aspect-ratio: 12 / 7;
}

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 阶段条 ---------- */

.page-about .about-rail {
  margin-top: 56px;
  padding: 26px 20px 30px;
  background: var(--bg-alt);
  border: 1px solid var(--rule);
}

.page-about .about-rail__head {
  margin-bottom: 8px;
}

.page-about .about-rail__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-24);
  font-weight: 400;
  color: var(--ink-blue);
}

.page-about .about-rail__sub {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--ink-grey);
}

.page-about .about-rail__list {
  position: relative;
  display: flex;
  gap: 0;
  margin: 26px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--rule-strong);
}

.page-about .about-rail__node {
  position: relative;
  flex: 0 0 68%;
  padding: 24px 20px 0 0;
  scroll-snap-align: start;
}

.page-about .about-rail__dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--sand-gold);
  box-shadow: 0 0 0 4px var(--bg-alt);
}

.page-about .about-rail__node:last-child .about-rail__dot {
  background: var(--blank, var(--bg-alt));
  border: 1px solid var(--sand-gold);
}

.page-about .about-rail__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--press-blue);
}

.page-about .about-rail__name {
  display: block;
  margin-top: 5px;
  font-family: var(--font-serif);
  font-size: var(--fs-18);
  color: var(--ink-blue);
}

.page-about .about-rail__desc {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-grey);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  margin-top: 72px;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule-strong);
}

.page-about .chapter-no {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.5vw, 50px);
  font-weight: 300;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--sand-gold);
}

.page-about .chapter-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--ink-blue);
}

/* ---------- 两栏 ---------- */

.page-about .about-two-col {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .about-col-main p {
  margin: 0 0 16px;
  color: var(--ink-black);
  line-height: 1.9;
}

.page-about .about-col-main p:last-child {
  margin-bottom: 0;
}

.page-about .about-side__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.14em;
  color: var(--press-blue);
}

.page-about .about-entry {
  padding: 14px 0;
  border-top: 1px solid var(--rule);
}

.page-about .about-entry:last-child {
  border-bottom: 1px solid var(--rule);
}

.page-about .about-entry a {
  font-size: var(--fs-16);
  font-weight: 500;
  color: var(--ink-blue);
}

.page-about .about-entry p {
  margin: 6px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--ink-grey);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: 28px;
  margin-top: 30px;
}

.page-about .about-timeline__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  font-size: var(--fs-14);
  color: var(--ink-grey);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.page-about .about-timeline__nav a:hover,
.page-about .about-timeline__nav a:focus-visible {
  color: var(--sand-gold);
}

.page-about .about-timeline__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--press-blue);
}

.page-about .about-stage {
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--rule);
  scroll-margin-top: 120px;
}

.page-about .about-stage:last-of-type {
  border-bottom: 0;
}

.page-about .about-stage__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sand-gold);
}

.page-about .about-stage h3 {
  margin: 8px 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-24);
  font-weight: 400;
  color: var(--ink-blue);
}

.page-about .about-stage p {
  margin: 0;
  color: var(--ink-grey);
  line-height: 1.9;
}

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

/* ---------- 团队 ---------- */

.page-about .about-team__lede {
  margin: 26px 0 0;
  max-width: 46em;
  color: var(--ink-grey);
  line-height: 1.9;
}

.page-about .about-team {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}

.page-about .about-team-card {
  padding: 26px 22px 24px;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .about-team-card:hover {
  border-color: var(--celadon);
  transform: translateY(-2px);
}

.page-about .about-team-card__no {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--rule-gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--sand-gold);
}

.page-about .about-team-card h3 {
  margin: 14px 0 12px;
  font-family: var(--font-serif);
  font-size: var(--fs-24);
  font-weight: 400;
  color: var(--ink-blue);
}

.page-about .about-team-card p {
  margin: 0 0 14px;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--ink-grey);
}

.page-about .about-team-card__tags {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--celadon);
  opacity: 0.6;
  transition: opacity 0.18s var(--ease);
}

.page-about .about-team-card:hover .about-team-card__tags {
  opacity: 1;
}

.page-about .about-team-card--core {
  background: var(--ink-blue);
  border-color: var(--ink-blue);
}

.page-about .about-team-card--core h3 {
  color: var(--paper);
}

.page-about .about-team-card--core p {
  color: rgba(247, 242, 232, 0.78);
}

.page-about .about-team-card--core .about-team-card__tags {
  border-top-color: var(--rule-dark);
  color: var(--sand-gold);
}

.page-about .about-team-card--core .about-team-card__no {
  border-color: var(--rule-gold);
  color: var(--sand-gold);
}

.page-about .about-team__figure {
  margin-top: 32px;
}

/* ---------- 内容结构 ---------- */

.page-about .about-structure {
  margin-top: 30px;
  padding: 28px 20px 32px;
  background: var(--bg-alt);
  border: 1px solid var(--rule);
}

.page-about .about-structure__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-way__no {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
}

.page-about .about-way h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-24);
  font-weight: 400;
  color: var(--ink-blue);
}

.page-about .about-way p {
  margin: 0;
  color: var(--ink-grey);
  line-height: 1.9;
}

.page-about .about-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 30px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--rule);
  list-style: none;
}

.page-about .about-cat {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  font-size: var(--fs-14);
  color: var(--ink-blue);
}

.page-about .about-cat span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sand-gold);
}

/* ---------- 长期支持 ---------- */

.page-about .about-support {
  margin-top: 30px;
  padding: 34px 22px 36px;
  background: var(--ink-blue);
  color: var(--paper);
}

.page-about .about-support__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.16em;
  color: var(--sand-gold);
}

.page-about .about-support__title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 400;
  color: var(--paper);
}

.page-about .about-support__lede {
  margin: 0 0 30px;
  max-width: 44em;
  color: rgba(247, 242, 232, 0.74);
  line-height: 1.9;
}

.page-about .about-support__list {
  display: grid;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-support__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-dark);
}

.page-about .about-support__no {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.1em;
  color: var(--sand-gold);
  padding-top: 3px;
}

.page-about .about-support__item p {
  margin: 0;
  color: rgba(247, 242, 232, 0.82);
  line-height: 1.85;
}

.page-about .about-support__foot {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--rule-dark);
}

.page-about .about-support__foot p {
  margin: 0;
  max-width: 44em;
  font-size: var(--fs-14);
  line-height: 1.9;
  color: rgba(247, 242, 232, 0.7);
}

.page-about .about-support__foot a.link-u {
  color: var(--sand-gold);
}

.page-about .about-support__btn {
  color: var(--sand-gold);
  border-color: var(--rule-gold);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-team-card__tags,
  .page-about .about-timeline__nav a {
    transition: none;
  }
  .page-about .about-team-card:hover {
    transform: none;
  }
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 720px) {
  .page-about .about-rail {
    padding: 32px 32px 36px;
  }

  .page-about .about-structure {
    padding: 36px 34px 40px;
  }

  .page-about .about-structure__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .page-about .about-support {
    padding: 44px 38px 46px;
  }

  .page-about .about-support__list {
    grid-template-columns: 1fr 1fr;
    gap: 24px 44px;
  }

  .page-about .about-support__foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-hero__kicker {
    margin-bottom: 18px;
  }

  .page-about .about-rail {
    margin-top: 72px;
    padding: 38px 42px 78px;
  }

  .page-about .about-rail__list {
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__node {
    flex: 1 1 0;
    min-width: 0;
    padding-right: 18px;
  }

  .page-about .about-rail__desc {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 12px;
    opacity: 0;
    transform: translateY(-5px);
    pointer-events: none;
    transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
  }

  .page-about .about-rail__node:hover .about-rail__desc,
  .page-about .about-rail__node:focus-within .about-rail__desc {
    opacity: 1;
    transform: translateY(0);
  }

  .page-about .about-two-col {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .about-col-side {
    padding-left: 28px;
    border-left: 1px solid var(--rule);
  }

  .page-about .about-timeline {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-timeline__nav {
    display: block;
    position: sticky;
    top: 112px;
  }

  .page-about .about-timeline__nav li {
    margin-bottom: 2px;
  }

  .page-about .about-timeline__nav a {
    display: flex;
    padding: 11px 0 11px 16px;
    border-left: 1px solid var(--rule);
    transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
  }

  .page-about .about-timeline__nav a:hover,
  .page-about .about-timeline__nav a:focus-visible {
    border-left-color: var(--sand-gold);
    color: var(--ink-blue);
  }

  .page-about .about-team {
    grid-template-columns: 1fr 1.24fr 1fr;
    gap: 22px;
    align-items: start;
  }

  .page-about .about-team > .about-team-card:first-child {
    margin-top: 36px;
  }

  .page-about .about-team > .about-team-card:last-child {
    margin-top: 36px;
  }

  .page-about .about-team__figure {
    margin-top: 46px;
  }

  .page-about .about-figure--square {
    max-width: 380px;
    margin-top: 30px;
  }

  .page-about .about-section {
    margin-top: 96px;
  }
}
<<<PAGE_CSS_END>>>

.page-about {
  --blank: transparent;
}