.page-about {
  background:
    radial-gradient(880px 520px at 88% -8%, rgba(53, 241, 208, .15), transparent 62%),
    radial-gradient(700px 460px at -6% 14%, rgba(255, 179, 71, .1), transparent 64%),
    var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(36px, 5vw, 68px);
  align-items: end;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: 18px;
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .about-hero .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.08;
  letter-spacing: .06em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.85;
  color: var(--mint);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-chip {
  border: 1px solid var(--glass-line);
  background: var(--glass);
  border-radius: 999px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mint);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--r-l);
  overflow: hidden;
  border: 1px solid var(--glass-line);
  background: var(--stand);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 21, 0) 42%, rgba(3, 16, 13, .84) 100%);
  pointer-events: none;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 1;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--mint);
}

/* ---------- 布局与目录 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  padding-top: clamp(28px, 4vw, 48px);
}

.page-about .about-toc {
  border: 1px solid var(--glass-line);
  background: var(--glass);
  -webkit-backdrop-filter: blur(9px);
  backdrop-filter: blur(9px);
  border-radius: var(--r-m);
  padding: 14px 14px 12px;
  min-width: 0;
}

.page-about .about-toc .label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 11px;
  border-radius: var(--r-s);
  border: 1px solid transparent;
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-toc__link:hover {
  color: var(--paper);
  border-color: var(--glass-line);
}

.page-about .about-toc__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--cyan);
  opacity: .8;
}

.page-about .about-toc__link[aria-current="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 600;
}

.page-about .about-toc__link[aria-current="true"] .about-toc__num {
  color: var(--ink);
  opacity: .65;
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-chapter {
  padding-block: clamp(34px, 5vw, 62px);
  border-top: 1px solid var(--hairline);
}

.page-about .about-body .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-end;
  gap: clamp(10px, 2vw, 18px);
  margin-bottom: 18px;
}

.page-about .about-chapter .chapter__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(42px, 10vw, 96px);
  line-height: .78;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(53, 241, 208, .55);
}

.page-about .about-chapter__title {
  margin: 0 0 4px;
  min-width: 0;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.28;
  letter-spacing: .04em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 70ch;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--paper);
  opacity: .94;
}

.page-about .about-p a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--glass-line);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .about-p a:hover {
  color: var(--mint);
  border-bottom-color: var(--cyan);
}

.page-about .about-media__caption {
  padding: 10px 2px 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
  letter-spacing: .02em;
}

/* ---------- 场景 ---------- */
.page-about .about-scenes {
  list-style: none;
  margin: 22px 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-scene {
  border-left: 2px solid var(--cyan);
  padding: 2px 0 2px 13px;
  min-width: 0;
}

.page-about .about-scene__title {
  margin: 0;
  font-size: 14px;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-about .about-scene__text {
  margin: 5px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .flow-node {
  position: relative;
  min-width: 0;
  padding: 16px 16px 15px 19px;
  background: var(--stand);
  border: 1px solid var(--hairline);
  border-radius: var(--r-m);
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}

.page-about .flow-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 241, 208, 0));
}

.page-about .flow-node:hover,
.page-about .flow-node:focus-within {
  background: var(--board);
  border-color: var(--glass-line);
  transform: translateY(-2px);
}

.page-about .flow-node__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .flow-node__title {
  margin: 5px 0 0;
  font-size: 15px;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-about .flow-node__note {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .flow-node__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mint);
  transition: max-height .3s var(--ease), opacity .22s var(--ease), margin .3s var(--ease);
}

.page-about .flow-node:hover .flow-node__more,
.page-about .flow-node:focus-within .flow-node__more {
  max-height: 140px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 图文与数据 ---------- */
.page-about .about-figure-media {
  margin: 24px 0 0;
  border-radius: var(--r-m);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--stand);
}

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

.page-about .about-figure-media--tight {
  margin-top: 20px;
}

.page-about .about-figure-media .about-media__caption {
  padding: 10px 14px 12px;
}

.page-about .about-figures {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
}

.page-about .about-figure {
  background: var(--board);
  border: 1px solid var(--hairline);
  border-radius: var(--r-m);
  padding: 14px 14px 13px;
  min-width: 0;
}

.page-about .about-figure__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.6vw, 25px);
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 5px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 团队矩阵 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-item {
  min-width: 0;
  background: var(--board);
  border: 1px solid var(--hairline);
  border-radius: var(--r-m);
  padding: 18px 18px 16px;
  transition: border-color .2s var(--ease);
}

.page-about .team-item:hover {
  border-color: var(--glass-line);
}

.page-about .team-item__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--mint);
}

.page-about .team-item__name {
  margin: 9px 0 0;
  font-size: 14.5px;
  letter-spacing: .06em;
  color: var(--paper);
}

.page-about .team-item__desc {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.74;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--glass-line);
  min-width: 0;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 241, 208, .13);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 179, 71, .16);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-timeline__title {
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.45;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 7px 0 0;
  max-width: 66ch;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 档案浅色块 ---------- */
.page-about .about-archive {
  margin: 22px 0;
  padding: clamp(18px, 4vw, 30px);
  background: var(--archive);
  color: var(--archive-ink);
  border-radius: var(--r-l);
  border: 1px solid rgba(37, 71, 60, .16);
}

.page-about .about-archive__title {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: .04em;
  color: var(--archive-ink);
}

.page-about .about-archive__lead {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: #3f6154;
}

.page-about .about-partners {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-partner {
  min-width: 0;
  padding: 14px;
  border-radius: var(--r-s);
  background: rgba(255, 255, 255, .62);
  border: 1px solid rgba(37, 71, 60, .14);
}

.page-about .about-partner__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1;
  color: var(--stand);
}

.page-about .about-partner__label {
  margin: 7px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: #3f6154;
}

/* ---------- 联系信息 ---------- */
.page-about .about-contact {
  display: grid;
  gap: 14px;
  margin: 22px 0 20px;
}

.page-about .contact-row {
  min-width: 0;
  border-top: 1px solid var(--hairline);
  padding-top: 10px;
}

.page-about .contact-row__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .contact-row__value {
  display: block;
  margin-top: 5px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .contact-row__value a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid var(--glass-line);
}

.page-about .contact-row__value a:hover {
  color: var(--cyan);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
  }

  .page-about .contact-row--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-layout {
    grid-template-columns: 244px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--frame-h) + 20px);
  }

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

  .page-about .about-toc__link {
    white-space: normal;
    border-radius: var(--r-s);
  }

  .page-about .about-chapter__head {
    margin-bottom: 22px;
  }

  .page-about .about-team {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .team-item--half {
    grid-column: span 3;
  }

  .page-about .team-item--third {
    grid-column: span 2;
  }

  .page-about .about-timeline__item {
    padding-left: 32px;
    padding-bottom: 30px;
  }
}

@media (max-width: 959px) {
  .page-about .flow-node__more {
    max-height: none;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow-node,
  .page-about .flow-node__more,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .flow-node:hover,
  .page-about .flow-node:focus-within {
    transform: none;
  }
}
<<<END>>>