.page-about {
  background: var(--night);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumbs {
  padding-top: 26px;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumbs li {
  display: flex;
  align-items: center;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line);
}

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

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--lime);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 26px 0 52px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-hero .eyebrow {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  margin: 0;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 14px 0 18px;
  max-width: 18em;
}

.page-about .about-hero__text {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--paper);
  max-width: 36em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-about .board-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 16px;
  background: var(--board);
}

.page-about .board-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .board-num--amber {
  color: var(--amber);
}

.page-about .board-num--press {
  color: var(--press);
}

.page-about .board-label {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 章节外壳 ---------- */
.page-about .about-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .section-index {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  padding: 10px 14px;
  margin-bottom: 28px;
}

.page-about .section-index-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .section-index-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-20);
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0;
}

.page-about .section-index-rule {
  flex: 1 1 40px;
  min-width: 24px;
  height: 1px;
  background: var(--line);
}

.page-about .split {
  display: grid;
  gap: 28px;
}

.page-about .split > * {
  min-width: 0;
}

.page-about .prose p {
  margin: 0 0 1.1em;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--paper);
  max-width: 36em;
}

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

.page-about .section-lede {
  margin: 0 0 26px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--paper);
  max-width: 62ch;
}

/* ---------- 关键节奏 ---------- */
.page-about .about-facts {
  border: 1px solid var(--line);
  background: var(--board);
  padding: 20px 18px;
}

.page-about .about-facts__title {
  font-family: var(--font-display);
  font-size: var(--fs-16);
  letter-spacing: 0.02em;
  color: var(--lime);
  margin: 0 0 12px;
}

.page-about .fact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .fact-list li {
  display: grid;
  gap: 6px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--paper);
}

.page-about .fact-key {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 数据流水线 ---------- */
.page-about .pipe {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-about .pipe li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 16px;
  background: var(--board);
}

.page-about .pipe li > div {
  min-width: 0;
}

.page-about .pipe-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--amber);
  padding-top: 4px;
}

.page-about .pipe h3 {
  font-family: var(--font-display);
  font-size: var(--fs-20);
  font-weight: 700;
  color: var(--white);
  margin: 0 0 4px;
}

.page-about .pipe p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 球队库 ---------- */
.page-about .library-side {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-about .library-side .media-frame {
  margin: 0;
}

.page-about .alias {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .alias-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  padding: 11px 14px;
  background: var(--board);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--paper);
}

.page-about .alias-row span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-about .alias-row--head {
  background: var(--night);
  color: var(--muted);
  letter-spacing: 0.08em;
}

.page-about .alias-pick {
  color: var(--lime);
}

.page-about .pulled-quote {
  margin: 32px 0 0;
  padding: 26px 22px;
  background: var(--brown);
  border-left: 4px solid var(--press);
  max-width: 62ch;
}

.page-about .pulled-quote p {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 4.6vw, 28px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .pulled-quote cite {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--paper);
  opacity: 0.78;
}

/* ---------- 团队 ---------- */
.page-about .section--wide {
  background: var(--board);
}

.page-about .team-photo {
  margin: 0 0 28px;
}

.page-about .flow {
  border: 1px solid var(--line);
  background: var(--night);
  padding: 18px 16px 8px;
}

.page-about .flow svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .flow-node rect {
  fill: var(--board);
  stroke: var(--line);
  stroke-width: 1;
  transition: fill var(--ease), stroke var(--ease);
}

.page-about .flow-node text {
  fill: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  text-anchor: middle;
  transition: fill var(--ease);
}

.page-about .flow-node:hover rect,
.page-about .flow-node:focus rect,
.page-about .flow-node:focus-visible rect {
  fill: var(--lime);
  stroke: var(--lime);
}

.page-about .flow-node:hover text,
.page-about .flow-node:focus text {
  fill: var(--night);
}

.page-about .flow-node:focus {
  outline: none;
}

.page-about .flow-link {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.5;
}

.page-about .duty-grid {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .duty {
  border-left: 2px solid var(--line);
  padding: 2px 0 2px 12px;
}

.page-about .duty-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--press);
}

.page-about .duty h3 {
  font-family: var(--font-display);
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--white);
  margin: 4px 0 4px;
}

.page-about .duty p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 里程碑 ---------- */
.page-about .milestone-grid {
  display: grid;
  gap: 28px;
}

.page-about .milestone-grid > * {
  min-width: 0;
}

.page-about .milestone-photo {
  margin: 0;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--brown);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 14px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 18px;
  width: 9px;
  height: 9px;
  background: var(--press);
  transition: background var(--ease);
}

.page-about .tl-item:hover::before {
  background: var(--lime);
}

.page-about .tl-item details {
  border: 1px solid var(--line);
  background: var(--night);
}

.page-about .tl-item summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 13px 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-item summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .tl-version {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--lime);
  flex: 0 0 auto;
}

.page-about .tl-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--white);
}

.page-about .tl-item details[open] summary {
  border-bottom: 1px solid var(--line);
}

.page-about .tl-body {
  margin: 0;
  padding: 12px 14px 14px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-about .partner-cards {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  align-self: start;
}

.page-about .partner-card {
  background: var(--board);
  padding: 22px 18px;
}

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

.page-about .partner-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-44);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .partner-num--amber {
  color: var(--amber);
}

/* ---------- 用户规模 ---------- */
.page-about .stats {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 26px;
}

.page-about .stat-cell {
  background: var(--board);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat-cell__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

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

.page-about .stat-cell__value--press {
  color: var(--press);
  font-size: var(--fs-20);
}

.page-about .stat-cell__label {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .coda {
  margin: 0 0 22px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--paper);
  max-width: 62ch;
}

.page-about .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .duty-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 32px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .about-section {
    padding: 64px 0;
  }

  .page-about .section-index {
    margin-bottom: 34px;
  }

  .page-about .split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
  }

  .page-about .split--reverse {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

  .page-about .milestone-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: start;
  }

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

  .page-about .flow {
    padding: 24px 24px 12px;
  }
}
<<<END>>>