.page-about {
  --about-line: rgba(230, 225, 212, 0.14);
  --about-line-strong: rgba(244, 241, 234, 0.26);
  --about-card: rgba(42, 48, 64, 0.42);
  padding-bottom: 72px;
  overflow-wrap: break-word;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 0;
}

.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7.8vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--warm);
}

.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 600px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--bone);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--rock);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--about-card);
  box-shadow: var(--shadow-soft);
}

.page-about .about-facts li {
  padding: 14px 16px;
  border-top: 2px solid var(--about-line);
  border-left: 2px solid var(--about-line);
  min-width: 0;
}

.page-about .about-facts li:nth-child(1),
.page-about .about-facts li:nth-child(2) {
  border-top: 0;
}

.page-about .about-facts li:nth-child(odd) {
  border-left: 0;
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 4.6vw, 1.85rem);
  line-height: 1.15;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-about .about-facts__label {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--bone);
  opacity: 0.78;
}

.page-about .about-band {
  height: 2px;
  margin: 30px 0 0;
  background: linear-gradient(90deg, transparent, var(--violet), var(--cyan), transparent);
  opacity: 0.85;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding-top: 18px;
}

.page-about .about-index {
  padding: 6px 0 14px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--bone);
  opacity: 0.6;
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 2px solid var(--about-line);
  border-radius: var(--radius-pill);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  color: var(--bone);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--warm);
  background: rgba(53, 224, 208, 0.08);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--violet);
  filter: brightness(1.45);
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: 40px 0 8px;
  border-top: 2px solid var(--about-line);
}

.page-about .about-chapters > .chapter:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .chapter__head {
  margin-bottom: 20px;
}

.page-about .chapter__no {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .chapter__no::after {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--violet);
}

.page-about .chapter__title {
  margin: 8px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 4.8vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .chapter__text {
  max-width: 600px;
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--bone);
}

.page-about .chapter__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-note {
  max-width: 460px;
  margin: 22px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--cyan);
  border-radius: 0 10px 10px 0;
  background: rgba(53, 224, 208, 0.08);
  font-size: 15px;
  line-height: 1.75;
  color: var(--bone);
}

/* ---------- 原则 ---------- */
.page-about .principles {
  display: grid;
  gap: 14px;
  margin-top: 6px;
}

.page-about .principle {
  border: 2px solid var(--rock);
  border-radius: var(--radius-card);
  background: var(--about-card);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .principle:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.55);
  border-color: var(--about-line-strong);
}

.page-about .principle__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  line-height: 1.35;
  color: var(--warm);
}

.page-about .principle__summary::-webkit-details-marker {
  display: none;
}

.page-about .principle__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .principle__name {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .principle__hint {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--gold);
  transition: transform 0.2s var(--ease);
}

.page-about .principle[open] .principle__hint {
  transform: rotate(45deg);
}

.page-about .principle__body {
  display: grid;
  gap: 18px;
  padding: 16px;
  border-top: 2px solid var(--about-line);
}

.page-about .principle__do h3,
.page-about .principle__edge h3 {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--bone);
  opacity: 0.7;
}

.page-about .principle__do p,
.page-about .principle__edge p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--bone);
}

.page-about .principle__edge {
  padding-left: 14px;
  border-left: 3px solid var(--clay);
}

/* ---------- 图像 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 2px solid var(--rock);
  border-radius: var(--radius-card);
  background: var(--space-900);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  max-width: 46ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--bone);
  opacity: 0.7;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline__item {
  position: relative;
  margin-left: 5px;
  padding: 0 0 26px 30px;
  border-left: 2px solid rgba(108, 76, 224, 0.42);
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--space);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px rgba(53, 224, 208, 0.45);
}

.page-about .timeline__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--violet);
  filter: brightness(1.5);
}

.page-about .timeline__name {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--warm);
}

.page-about .timeline__desc {
  margin: 0;
  max-width: 520px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--bone);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .teams {
  display: grid;
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .team {
  padding: 14px 16px;
  border: 2px solid var(--rock);
  border-radius: 10px;
  background: var(--about-card);
}

.page-about .team__name {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .team p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--bone);
}

.page-about .about-figure--side {
  margin-top: 4px;
}

/* ---------- 版本与文档 ---------- */
.page-about .gov-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 18px 0 22px;
}

.page-about .gov-card {
  padding: 18px;
  border: 2px solid var(--rock);
  border-left: 6px solid var(--violet);
  border-radius: var(--radius-card);
  background: var(--about-card);
  box-shadow: var(--shadow-soft);
}

.page-about .gov-card:nth-child(2) {
  border-left-color: var(--cyan);
}

.page-about .gov-card:nth-child(3) {
  border-left-color: var(--gold);
}

.page-about .gov-card__num {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--bone);
  opacity: 0.6;
}

.page-about .gov-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--warm);
}

.page-about .gov-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bone);
}

/* ---------- 协作与部署 ---------- */
.page-about .eco-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--about-line);
}

.page-about .eco-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  border-bottom: 2px solid var(--about-line);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--bone);
}

.page-about .eco-list__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  margin: 44px 0 0;
  padding: 24px 20px;
  border: 2px solid var(--violet);
  border-radius: var(--radius-card);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(108, 76, 224, 0.34), transparent 62%),
    radial-gradient(120% 140% at 100% 100%, rgba(53, 224, 208, 0.2), transparent 62%),
    var(--space-900);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 4.2vw, 1.6rem);
  letter-spacing: -0.01em;
  color: var(--warm);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 520px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--bone);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-facts li {
    border-top: 0;
  }

  .page-about .about-facts li:nth-child(odd) {
    border-left: 2px solid var(--about-line);
  }

  .page-about .about-facts li:first-child {
    border-left: 0;
  }

  .page-about .principle__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.66fr);
    align-items: start;
  }
}

@media (min-width: 860px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 36px;
    align-items: start;
  }

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

  .page-about .gov-card:nth-child(2) {
    margin-top: 20px;
  }

  .page-about .gov-card:nth-child(3) {
    margin-top: 40px;
  }
}

@media (min-width: 960px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-hero {
    padding-top: 34px;
  }

  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 28px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding: 14px 0 0;
    border-top: 2px solid var(--about-line);
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__list a {
    width: 100%;
    padding: 8px 0 8px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
    color: var(--warm);
  }

  .page-about .chapter {
    padding-top: 48px;
  }

  .page-about .chapter__title {
    max-width: 26ch;
  }

  .page-about .about-cta {
    padding: 30px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .principle,
  .page-about .principle__hint,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .principle:hover {
    transform: none;
    box-shadow: var(--shadow-soft);
  }
}
<<<END>>>