.page-about {
  --about-axis-w: 92px;
  --about-edge: 2px solid var(--grid);
  --about-thick: 4px;
}

/* 首屏 */
.page-about .about-hero-wrap {
  padding-block: clamp(20px, 4vw, 44px) clamp(28px, 5vw, 56px);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.012em;
  color: var(--paper);
  margin: 12px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__lead .lede {
  margin-top: 16px;
  max-width: 54ch;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-index {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-index .chip {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--grid);
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-index .chip:hover,
.page-about .about-index .chip:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(22, 242, 200, 0.07);
}

.page-about .about-hero__media {
  aspect-ratio: 14 / 9;
  width: 100%;
  border: var(--about-edge);
  box-shadow: 6px 6px 0 rgba(6, 26, 20, 0.75);
  overflow: hidden;
}

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

.page-about .about-stats {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-stats .stat {
  background: var(--ink-800);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background var(--dur) var(--ease);
}

.page-about .about-stats .stat:hover {
  background: var(--panel);
}

.page-about .about-stats .stat__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about .about-stats .stat__label {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.5;
}

.page-about .about-unit {
  font-size: 0.6em;
  margin-left: 2px;
  color: var(--paper);
}

/* 起点 */
.page-about .about-origin {
  padding-block: clamp(34px, 6vw, 72px);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-origin__body h2 {
  margin: 10px 0 18px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-origin__body p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-origin__panel {
  border: var(--about-edge);
  box-shadow: 5px 5px 0 rgba(6, 26, 20, 0.7);
  align-self: start;
}

.page-about .about-origin__panel .panel__head {
  color: var(--amber);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--grid);
  padding-bottom: 10px;
}

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

.page-about .about-origin__list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-origin__list li:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .about-origin__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .about-origin__list strong {
  display: block;
  font-size: 15px;
  color: var(--paper);
  font-weight: 700;
  margin-bottom: 4px;
}

.page-about .about-origin__list p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team {
  padding-block: clamp(34px, 6vw, 72px);
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
}

.page-about .about-team .section-head {
  max-width: 72ch;
  margin-bottom: clamp(22px, 3.5vw, 36px);
}

.page-about .about-team .section-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-team .section-head .lede {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(20px, 4vw, 38px);
}

.page-about .about-team__chart {
  border: var(--about-edge);
  background: var(--ink-900);
  padding: 12px;
  box-shadow: inset 0 0 0 1px rgba(23, 60, 49, 0.6);
}

.page-about .team-net {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .team-net__lines path {
  fill: none;
  stroke: var(--grid);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.page-about .team-net__node circle {
  fill: var(--panel-2);
  stroke: var(--grid);
  stroke-width: 2;
  transition: stroke var(--dur) var(--ease), fill var(--dur) var(--ease);
}

.page-about .team-net__node text {
  fill: var(--paper);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.page-about .team-net__node--core circle {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 2.5;
}

.page-about .team-net__node:hover circle {
  stroke: var(--amber);
  fill: var(--panel);
}

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

.page-about .about-team__item {
  border-left: var(--about-thick) solid var(--grid);
  padding: 10px 0 10px 16px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-team__item:hover {
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(22, 242, 200, 0.08), rgba(22, 242, 200, 0));
}

.page-about .about-team__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 更新节奏 */
.page-about .about-rhythm {
  padding-block: clamp(34px, 6vw, 72px);
}

.page-about .about-rhythm .section-head {
  max-width: 74ch;
  margin-bottom: clamp(20px, 3.5vw, 32px);
}

.page-about .about-rhythm .section-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-rhythm .section-head .lede {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--grid);
  vertical-align: top;
  line-height: 1.65;
}

.page-about .about-table thead th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: var(--panel-2);
  border-bottom: 1px solid var(--steel);
  white-space: nowrap;
}

.page-about .about-table tbody th {
  color: var(--paper);
  font-weight: 700;
  white-space: nowrap;
}

.page-about .about-table tbody td {
  color: var(--muted);
}

.page-about .about-table tbody tr {
  transition: background var(--dur) var(--ease);
}

.page-about .about-table tbody tr:hover {
  background: rgba(22, 242, 200, 0.06);
}

.page-about .about-table tbody tr:hover th {
  color: var(--cyan);
}

.page-about .about-table a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 242, 200, 0.4);
  transition: border-color var(--dur) var(--ease);
}

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

.page-about .about-rhythm__notes {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3.5vw, 30px);
}

.page-about .about-rhythm__notes .note {
  border-top: 2px solid var(--grid);
  padding-top: 12px;
}

.page-about .about-rhythm__notes .note:hover {
  border-top-color: var(--amber);
}

.page-about .about-rhythm__notes .tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
  display: inline-block;
}

.page-about .about-rhythm__notes p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* 发展节点 */
.page-about .about-timeline {
  padding-block: clamp(34px, 6vw, 72px);
  border-top: 1px solid var(--grid);
}

.page-about .about-timeline .section-head {
  max-width: 72ch;
  margin-bottom: clamp(20px, 3.5vw, 32px);
}

.page-about .about-timeline .section-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-timeline .section-head .lede {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-timeline__media {
  aspect-ratio: 16 / 7;
  width: 100%;
  margin: 0 0 clamp(22px, 4vw, 38px);
  border: var(--about-edge);
  box-shadow: 6px 6px 0 rgba(6, 26, 20, 0.7);
  overflow: hidden;
}

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

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

.page-about .about-tl__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 18px 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-tl__year {
  justify-self: start;
  align-self: start;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-900);
  background: var(--amber);
  border: 2px solid var(--ink-900);
  box-shadow: 4px 4px 0 var(--grid);
  padding: 4px 14px;
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-tl__row:hover .about-tl__year {
  box-shadow: 4px 4px 0 var(--cyan);
  transform: translate(-1px, -1px);
}

.page-about .about-tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  color: var(--paper);
  line-height: 1.4;
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-tl__extra {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin var(--dur) var(--ease);
  color: var(--steel);
}

.page-about .about-tl__row:hover .about-tl__extra,
.page-about .about-tl__row:focus-within .about-tl__extra {
  max-height: 9em;
  opacity: 1;
  margin-top: 8px;
  color: var(--paper);
}

/* 合作生态 */
.page-about .about-partners {
  padding-block: clamp(34px, 6vw, 72px);
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
}

.page-about .about-partners__body h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-partners__body > p {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .about-partners__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 14px 0;
  border-top: 1px solid var(--grid);
}

.page-about .about-partners__list .tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border: 1px solid var(--cyan);
  color: var(--cyan);
}

.page-about .about-partners__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-honor {
  display: inline-block;
  margin-top: 20px;
  padding: 9px 16px;
  border: 2px solid var(--amber);
  color: var(--amber);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 4px 4px 0 rgba(245, 184, 75, 0.18);
}

.page-about .about-partners__media {
  aspect-ratio: 4 / 3;
  width: 100%;
  border: var(--about-edge);
  box-shadow: 6px 6px 0 rgba(6, 26, 20, 0.7);
  overflow: hidden;
}

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

/* 规模与 CTA */
.page-about .about-scale {
  padding-block: clamp(34px, 6vw, 76px);
}

.page-about .about-scale__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .about-scale__intro h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .about-scale__intro p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-scale__list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--grid);
}

.page-about .about-scale__list > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--grid);
}

.page-about .about-scale__list dt {
  font-size: 13.5px;
  color: var(--muted);
}

.page-about .about-scale__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--paper);
  text-align: right;
  letter-spacing: 0.01em;
}

.page-about .about-cta {
  margin-top: clamp(26px, 4.5vw, 46px);
  padding: clamp(20px, 3.6vw, 32px);
  border: 2px solid var(--grid);
  background: linear-gradient(120deg, var(--panel), var(--ink-800) 65%, rgba(22, 242, 200, 0.08));
  box-shadow: 6px 6px 0 rgba(6, 26, 20, 0.7);
}

.page-about .about-cta > p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-about .about-cta__actions .btn {
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-cta__actions .btn:hover {
  transform: translateY(-1px);
}

/* 响应式 */
@media (min-width: 620px) {
  .page-about .about-rhythm__notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-partners__list li {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: start;
    gap: 14px;
  }
}

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-tl__row {
    grid-template-columns: 3fr 9fr;
    gap: 18px;
    align-items: start;
    padding: 22px 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

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

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
  }
}

@media (max-width: 759px) {
  .page-about .about-tl__extra {
    max-height: none;
    opacity: 1;
    margin-top: 8px;
    color: var(--muted);
  }

  .page-about .about-tl__year {
    box-shadow: 3px 3px 0 var(--grid);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index .chip,
  .page-about .about-stats .stat,
  .page-about .about-team__item,
  .page-about .about-tl__year,
  .page-about .about-tl__extra,
  .page-about .about-cta__actions .btn,
  .page-about .team-net__node circle {
    transition: none;
  }
}