.page-about {
  --about-gap: clamp(20px, 3.2vw, 44px);
  --about-sheet-shadow: 8px 8px 0 rgba(7, 11, 14, .85);
  padding: clamp(18px, 3vw, 34px) 0 clamp(52px, 8vw, 104px);
  color: var(--paper);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .text-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(39, 230, 214, .4);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about h2 {
  margin: 12px 0 0;
  line-height: 1.24;
}

.page-about p {
  margin: 14px 0 0;
  line-height: 1.78;
  overflow-wrap: break-word;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-lead {
  display: grid;
  gap: var(--about-gap);
}

.page-about .lead-story h1 {
  margin: 10px 0 0;
}

.page-about .lead-story .lede {
  max-width: 56ch;
  color: var(--paper);
  opacity: .93;
}

.page-about .lead-media {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--rule);
  background: var(--turf);
}

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

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

.page-about .media-frame--tall img {
  aspect-ratio: 4 / 3;
}

.page-about .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--paper);
  background: linear-gradient(90deg, rgba(7, 11, 14, .9), rgba(7, 11, 14, .55));
}

.page-about .lead-index {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .index-sheet {
  padding: 20px 20px 16px;
  border: 1px solid var(--rule);
  background: var(--panel-bg);
  box-shadow: var(--about-sheet-shadow);
}

.page-about .index-sheet__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .chapter-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .chapter-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 8px 4px;
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid rgba(38, 53, 46, .7);
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-about .chapter-list a:hover,
.page-about .chapter-list a:focus-visible {
  color: var(--cyan);
  padding-left: 8px;
}

.page-about .chapter-list__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  letter-spacing: .06em;
}

.page-about .lead-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .stat-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: linear-gradient(160deg, rgba(13, 26, 20, .96), rgba(7, 11, 14, .96));
}

.page-about .stat-cell .num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .stat-cell__label {
  font-size: 13px;
  color: var(--mist);
}

.page-about .num__unit {
  font-size: .42em;
  margin-left: 3px;
  color: var(--mist);
  letter-spacing: .02em;
}

/* ---------- 分栏段落 ---------- */
.page-about .about-split {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(48px, 7vw, 96px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--rule);
}

.page-about .about-story .serif-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .about-story p {
  color: rgba(242, 247, 244, .88);
  font-size: 16px;
}

.page-about .about-aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-about .fact-sheet,
.page-about .rhythm-board {
  padding: 20px 20px 18px;
  border: 1px solid var(--rule);
  background: var(--panel-bg);
  box-shadow: var(--about-sheet-shadow);
}

.page-about .fact-sheet__title,
.page-about .rhythm-board__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .fact-list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  justify-content: space-between;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(38, 53, 46, .9);
}

.page-about .fact-row:last-child {
  border-bottom: 0;
}

.page-about .fact-row dt {
  font-size: 14px;
  color: var(--mist);
}

.page-about .fact-row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
}

.page-about .aside-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

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

.page-about .rhythm-item {
  display: grid;
  grid-template-columns: minmax(88px, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(38, 53, 46, .8);
}

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

.page-about .rhythm-item__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 34px);
  font-weight: 700;
  color: var(--amber);
  line-height: 1;
}

.page-about .rhythm-item__unit {
  font-size: .38em;
  margin-left: 3px;
  color: var(--mist);
}

.page-about .rhythm-item__text {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(242, 247, 244, .88);
}

.page-about .rhythm-board__foot {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .data-media {
  margin-top: 22px;
}

.page-about .view-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .view-card {
  padding: 18px 16px;
  background: linear-gradient(150deg, rgba(13, 26, 20, .97), rgba(7, 11, 14, .97));
}

.page-about .view-card h3 {
  margin: 10px 0 0;
  font-size: 17px;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .view-card p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 版本时间线 ---------- */
.page-about .version-timeline {
  position: relative;
  margin: 0;
  padding: 6px 0 0 26px;
  list-style: none;
}

.page-about .version-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: var(--grad-cool);
  opacity: .75;
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 24px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}

.page-about .tl-item--current::before {
  background: var(--amber);
  border-color: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 90, 54, .18);
}

.page-about .tl-item__ver {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: .04em;
}

.page-about .tl-item--current .tl-item__ver {
  color: var(--amber);
}

.page-about .tl-item__year {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .tl-item__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 247, 244, .85);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(48px, 7vw, 96px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--rule);
}

.page-about .team-body p {
  color: rgba(242, 247, 244, .88);
  font-size: 16px;
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .team-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--panel-bg);
}

.page-about .team-stat .num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .team-stat__label {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 服务支持 ---------- */
.page-about .about-support {
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(24px, 4vw, 40px) clamp(20px, 3.4vw, 36px);
  border: 1px solid var(--rule);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(39, 230, 214, .09), transparent 58%),
    linear-gradient(160deg, rgba(13, 26, 20, .95), rgba(7, 11, 14, .97));
}

.page-about .support-head .lede {
  max-width: 62ch;
  color: rgba(242, 247, 244, .9);
}

.page-about .support-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 3.4vw, 34px);
}

.page-about .support-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--rule);
  background: rgba(7, 11, 14, .62);
}

.page-about .support-card__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .support-card__value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.5;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-about .support-card__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .support-card .btn {
  margin-top: 16px;
}

.page-about .support-tail {
  margin: clamp(22px, 3vw, 30px) 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

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

  .page-about .team-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-split--flip {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-split--flip .about-story {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-split--flip .about-aside {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .chapter-list a,
  .page-about .text-link {
    transition: none;
  }
}
<<<END>>>