.page-about {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about ul,
.page-about ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}

.page-about .prose {
  margin: 16px 0 0;
  max-width: 34em;
  color: var(--moss);
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .eyebrow {
  margin: 0 0 12px;
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-top {
  display: grid;
  gap: 30px;
  padding: 24px 0 52px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-top h1 {
  font-size: clamp(32px, 7vw, 58px);
  max-width: 15em;
  color: var(--paper);
}

.page-about .about-top__intro {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--moss);
}

.page-about .about-top__intro:first-of-type {
  color: var(--paper);
  font-size: 17px;
}

.page-about .about-slate {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 20px 18px 16px;
}

.page-about .about-slate__kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-slate__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-slate__row:last-of-type {
  border-bottom: 0;
}

.page-about .about-slate__row dt {
  font-size: 13px;
  color: var(--moss);
}

.page-about .about-slate__row dd {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
  text-align: right;
}

.page-about .about-slate__foot {
  margin: 14px 0 0;
  font-size: 11px;
  color: var(--moss);
  letter-spacing: 0.06em;
}

/* ---------- 通用双栏区块 ---------- */
.page-about .about-block {
  display: grid;
  gap: 18px;
  padding: 46px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-block__rail {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-block__num {
  font-size: 26px;
  color: var(--lime);
}

.page-about .about-block__tag {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--moss);
}

.page-about .about-block h2 {
  font-size: clamp(23px, 4.4vw, 34px);
  max-width: 18em;
}

.page-about .about-uses {
  margin-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .about-uses li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-uses li .mono {
  font-size: 12px;
  color: var(--amber);
  letter-spacing: 0.08em;
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 46px 0 40px;
}

.page-about .about-tl__head h2 {
  font-size: clamp(24px, 4.6vw, 36px);
  max-width: 16em;
}

.page-about .about-tl__lead {
  margin-top: 14px;
}

.page-about .about-tl__track {
  position: relative;
  margin-top: 34px;
}

.page-about .about-tl__spine {
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: calc(100% - 24px);
  overflow: visible;
}

.page-about .about-tl__spine path {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.page-about .tl-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 32px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  background: var(--ink-2);
  border: 1px solid var(--line);
}

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

.page-about .tl-item__mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.page-about .tl-item__year {
  font-size: 15px;
  color: var(--paper);
  letter-spacing: 0.06em;
}

.page-about .tl-item--current .tl-item__year {
  color: var(--lime);
}

.page-about .tl-item__ver {
  font-size: 12px;
  color: var(--moss);
}

.page-about .tl-item h3 {
  font-size: 20px;
  color: var(--paper);
}

.page-about .tl-item p {
  margin: 8px 0 0;
  max-width: 32em;
  font-size: 15px;
  color: var(--moss);
}

.page-about .tl-more {
  margin-top: 12px;
  border-left: 1px solid var(--line);
  padding-left: 14px;
}

.page-about .tl-more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lime);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.page-about .tl-more summary::after {
  content: "▾";
  font-size: 10px;
}

.page-about .tl-more[open] summary::after {
  content: "▴";
}

.page-about .tl-more summary:hover {
  color: var(--lime-deep);
}

.page-about .tl-more ul {
  margin-top: 10px;
}

.page-about .tl-more li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--moss);
}

.page-about .tl-more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--amber);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--block);
}

.page-about .about-figure__cap {
  margin: 8px 0 0;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--moss);
}

/* ---------- 数字带 ---------- */
.page-about .about-stats {
  background: var(--paper);
  color: var(--paper-ink);
  padding: 44px 0;
}

.page-about .about-stats__eyebrow {
  margin-bottom: 18px;
  color: var(--ink-2);
}

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

.page-about .about-stats__grid li {
  background: var(--paper);
  padding: 18px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-stats__num {
  font-size: clamp(26px, 5.2vw, 44px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--ink);
}

.page-about .about-stats__label {
  font-size: 14px;
  font-weight: 500;
  color: var(--paper-ink);
}

.page-about .about-stats__note {
  font-size: 12px;
  line-height: 1.5;
  color: #5C6B64;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 8px;
  padding: 50px 0 46px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team h2 {
  font-size: clamp(23px, 4.4vw, 34px);
  max-width: 14em;
}

.page-about .about-team__split {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-team__split li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--moss);
}

.page-about .about-team__split .mono {
  font-size: 18px;
  color: var(--amber);
}

/* ---------- 三项坚持 ---------- */
.page-about .about-cards {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-about .about-card {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 24px 20px 22px;
  transition: border-color var(--step-fast) var(--ease);
}

.page-about .about-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 20px;
  height: 2px;
  background: var(--ink);
}

.page-about .about-card__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--moss);
  margin-bottom: 10px;
  transition: color var(--step-fast) var(--ease);
}

.page-about .about-card h3 {
  font-size: 19px;
  color: var(--paper);
}

.page-about .about-card p {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--moss);
}

.page-about .about-card:hover {
  border-color: var(--lime-deep);
}

.page-about .about-card:hover .about-card__num {
  color: var(--lime);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-card__num {
    transition: none;
  }
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .about-reach {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-reach__head h2 {
  font-size: clamp(23px, 4.4vw, 34px);
  max-width: 14em;
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-about .about-chips li {
  border: 1px solid var(--line);
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--moss);
  letter-spacing: 0.04em;
}

.page-about .about-reach__note {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 14px;
  color: var(--moss);
}

.page-about .about-reach__note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-deep);
}

.page-about .about-reach__note a:hover {
  color: var(--lime-deep);
}

/* ---------- 收尾 CTA ---------- */
.page-about .about-cta {
  background: var(--lime);
  color: var(--ink);
  clip-path: polygon(0 9%, 100% 0, 100% 100%, 0 100%);
  padding: 74px 0 52px;
}

.page-about .about-cta h2 {
  font-size: clamp(24px, 4.8vw, 36px);
  color: var(--ink);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15px;
  color: var(--ink-2);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-cta__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: var(--ink);
  color: var(--lime);
  border: 1px solid var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background var(--step-fast) var(--ease), color var(--step-fast) var(--ease);
}

.page-about .about-cta__btn--ghost {
  background: transparent;
  color: var(--ink);
}

.page-about .about-cta__btn:hover {
  background: var(--ink-2);
  color: var(--paper);
}

.page-about .about-cta__btn--ghost:hover {
  background: var(--ink);
  color: var(--lime);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-stats__grid li {
    padding: 22px 18px 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-top {
    grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.7fr);
    align-items: start;
    gap: 48px;
    padding: 30px 0 64px;
  }

  .page-about .about-block {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: var(--gap);
    padding: 68px 0;
  }

  .page-about .about-block__rail {
    position: sticky;
    top: 96px;
    align-self: start;
    flex-direction: column;
    gap: 4px;
  }

  .page-about .about-block__num {
    font-size: 34px;
  }

  .page-about .about-tl {
    padding: 64px 0 56px;
  }

  .page-about .about-tl__track {
    margin-top: 44px;
    padding-left: 24px;
  }

  .page-about .about-tl__spine {
    left: 24px;
  }

  .page-about .tl-item {
    padding-left: 54px;
    padding-bottom: 40px;
  }

  .page-about .tl-item::before {
    left: 14px;
    top: 6px;
  }

  .page-about .about-figure--bleed {
    margin-right: calc(-1 * var(--gutter));
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 40px;
    padding: 64px 0 60px;
  }

  .page-about .about-team__figure {
    margin-top: 8px;
  }

  .page-about .about-stats {
    padding: 56px 0;
  }

  .page-about .about-reach {
    padding: 64px 0 56px;
  }

  .page-about .about-cta {
    padding: 96px 0 64px;
  }
}
</page_css>