.page-about {
  --about-radius: 22px;
  --about-gap: clamp(26px, 4.5vw, 52px);
  --about-line-soft: rgba(21, 26, 29, 0.12);
  --about-line-bright: rgba(247, 244, 238, 0.17);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(22px, 4vw, 38px) clamp(38px, 7vw, 84px);
  background:
    linear-gradient(158deg, rgba(110, 143, 163, 0.42), rgba(247, 244, 238, 0) 60%),
    var(--paper);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -28%;
  right: -12%;
  width: min(58vw, 640px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 34% 34%, rgba(77, 208, 225, 0.28), rgba(15, 92, 90, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -46px;
  width: 118%;
  height: 96px;
  background: linear-gradient(90deg, rgba(15, 92, 90, 0.14), rgba(242, 179, 61, 0.12) 70%, rgba(242, 179, 61, 0));
  transform: skewY(-2.4deg);
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(22px, 3.5vw, 40px);
}

.page-about .about-hero__lead .display {
  margin-block: 12px 18px;
  letter-spacing: -0.02em;
}

.page-about .about-hero__dek {
  max-width: 60ch;
  font-size: clamp(16px, 2.5vw, 19px);
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-hero__panel {
  align-self: start;
  padding: clamp(20px, 3vw, 28px);
  background: var(--paper);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-lg);
  box-shadow: 0 18px 40px -30px rgba(15, 92, 90, 0.6);
}

.page-about .about-hero__panel-title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--jade);
}

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

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-block: 11px;
  border-bottom: 1px dashed var(--about-line-soft);
}

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

.page-about .about-facts dt {
  font-size: 14px;
  color: var(--ink-soft);
}

.page-about .about-facts dd {
  margin: 0;
  font-weight: 800;
  font-size: 15px;
  color: var(--ink);
  text-align: right;
}

.page-about .about-facts dd.mono {
  color: var(--jade);
  background: rgba(242, 179, 61, 0.22);
  padding: 2px 8px;
  border-radius: var(--r-pill);
}

/* ---------- 通用小节元素 ---------- */
.page-about .about-lede {
  max-width: 64ch;
  margin-top: 14px;
  font-size: clamp(16px, 2.3vw, 18px);
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-lede--onDark {
  color: var(--on-dark);
}

.page-about .about-deep {
  color: var(--paper);
}

.page-about .about-deep .h2,
.page-about .about-deep .h3 {
  color: var(--paper);
}

.page-about .about-deep .about-lede {
  color: var(--on-dark);
}

.page-about .about-media {
  margin: clamp(24px, 4vw, 40px) 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

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

/* ---------- 起点 ---------- */
.page-about .about-split {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

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

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 旧版栏目地图 ---------- */
.page-about .about-legacy {
  position: relative;
  overflow: hidden;
}

.page-about .about-legacy::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 40%;
  background: radial-gradient(ellipse at 20% 100%, rgba(242, 179, 61, 0.14), rgba(15, 92, 90, 0) 70%);
  pointer-events: none;
}

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

.page-about .about-legacy__sub {
  margin-top: clamp(24px, 4vw, 38px);
  color: var(--paper);
}

.page-about .legacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.page-about .legacy-node {
  display: grid;
  gap: 3px;
  padding: 14px 16px;
  background: rgba(247, 244, 238, 0.06);
  border: 1px solid var(--about-line-bright);
  border-radius: var(--r-md);
  color: var(--paper);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .legacy-node:hover,
.page-about .legacy-node:focus-visible {
  transform: translateY(-4px);
  border-color: var(--amber);
  background: rgba(242, 179, 61, 0.12);
}

.page-about .legacy-node:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

.page-about .legacy-node__code {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .legacy-node__name {
  font-size: 16px;
  font-weight: 800;
}

.page-about .legacy-node__desc {
  font-size: 13px;
  color: rgba(247, 244, 238, 0.7);
}

.page-about .legacy-panel {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: 18px;
  border-top: 1px solid var(--about-line-bright);
}

.page-about .legacy-panel__summary {
  cursor: pointer;
  font-weight: 800;
  font-size: 16px;
  color: var(--amber);
}

.page-about .legacy-panel__summary:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 4px;
}

.page-about .legacy-panel__grid {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-about .legacy-panel__cell {
  padding: 16px 18px;
  background: rgba(21, 26, 29, 0.28);
  border-radius: var(--r-md);
  border: 1px solid var(--about-line-bright);
}

.page-about .legacy-panel__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .legacy-panel__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark);
}

.page-about .legacy-panel__body a {
  color: var(--volt);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-versions {
  position: relative;
  overflow: hidden;
}

.page-about .about-versions::before {
  content: "";
  position: absolute;
  top: -140px;
  left: -80px;
  width: min(60vw, 520px);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(124, 108, 240, 0.22), rgba(21, 26, 29, 0) 70%);
  pointer-events: none;
}

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

.page-about .about-versions .h2 {
  color: var(--paper);
}

.page-about .eyebrow--invert {
  color: var(--amber);
}

.page-about .timeline {
  position: relative;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--moss), var(--volt) 52%, var(--amber));
  border-radius: var(--r-pill);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.5vw, 36px) 4px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--charcoal);
  border: 3px solid var(--amber);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .timeline__item:hover::before {
  transform: scale(1.22);
  border-color: var(--volt);
}

.page-about .timeline__label {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .timeline__label .mono {
  color: var(--volt);
}

.page-about .timeline__item .h3 {
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .timeline__body {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--on-dark);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-team__card {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: clamp(18px, 3vw, 26px);
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  border-color: var(--amber);
}

.page-about .about-team__card .h3 {
  margin: 0;
}

.page-about .about-team__card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-team__num {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--moss);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__inner {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-partners__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-stat-stack {
  display: grid;
  gap: 14px;
}

.page-about .about-stat {
  padding: clamp(18px, 3vw, 26px);
  background: var(--paper);
  border-left: 5px solid var(--jade);
  border-radius: var(--r-md);
  box-shadow: 0 20px 40px -34px rgba(21, 26, 29, 0.8);
}

.page-about .about-stat--amber {
  border-left-color: var(--amber);
}

.page-about .about-stat--heart {
  border-left-color: var(--heart);
}

.page-about .about-stat__num {
  margin: 0;
  font-size: clamp(30px, 6vw, 42px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--jade);
}

.page-about .about-stat--amber .about-stat__num {
  color: var(--amber-deep);
}

.page-about .about-stat--heart .about-stat__num {
  color: var(--heart);
}

.page-about .about-stat__label {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-next__links {
  display: grid;
  gap: 12px;
}

.page-about .about-link {
  display: grid;
  gap: 4px;
  padding: 16px 20px;
  background: var(--paper);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--amber);
  background: rgba(242, 179, 61, 0.1);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

.page-about .about-link__title {
  font-size: 17px;
  font-weight: 800;
}

.page-about .about-link__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .legacy-panel__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-split__media {
    position: sticky;
    top: 28px;
  }

  .page-about .about-partners__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-stat-stack {
    grid-template-columns: 1fr;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-about .legacy-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .legacy-node,
  .page-about .about-link,
  .page-about .about-team__card,
  .page-about .timeline__item::before {
    transition: none;
  }

  .page-about .legacy-node:hover,
  .page-about .legacy-node:focus-visible,
  .page-about .about-link:hover,
  .page-about .about-link:focus-visible,
  .page-about .about-team__card:hover {
    transform: none;
  }
}
<<<END>>>