.page-about {
  background: var(--paper);
  color: var(--ink-text);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

.page-about .breadcrumb a:hover {
  color: var(--signal);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  background: var(--ink-900);
  color: var(--text-on-dark);
  padding-block: clamp(96px, 12vw, 148px) clamp(88px, 10vw, 132px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), 0 100%);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 50%;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(108deg, rgba(6, 11, 24, 0.96) 0%, rgba(6, 11, 24, 0.88) 44%, rgba(11, 20, 40, 0.46) 100%),
    repeating-linear-gradient(90deg, rgba(127, 178, 217, 0.09) 0 1px, transparent 1px 96px);
}

.page-about .about-hero__inner {
  position: relative;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
  display: grid;
  gap: clamp(32px, 5vw, 64px);
}

.page-about .about-hero__copy .eyebrow {
  margin-top: 28px;
}

.page-about .about-hero__copy .display {
  margin-top: 16px;
  max-width: 15em;
  text-wrap: balance;
}

.page-about .about-hero__copy .lede {
  margin-top: 22px;
  max-width: 34em;
  color: var(--text-on-dark);
}

.page-about .about-hero__ticker {
  margin: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-hero__ticker > div {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.page-about .about-hero__ticker dt {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--signal-soft);
}

.page-about .about-hero__ticker dd {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-on-dark);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(200px, 0.5fr);
    align-items: end;
  }
}

/* ---------- 坐标由来 ---------- */

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-origin__body .h2 {
  margin-top: 14px;
  max-width: 18em;
}

.page-about .about-origin__body .prose {
  margin-top: 22px;
  max-width: 36em;
}

.page-about .about-origin__body .prose p + p {
  margin-top: 18px;
}

.page-about .about-origin__body .note {
  margin-top: 28px;
  background: var(--paper-2);
  padding: 18px 20px;
}

.page-about .manifesto {
  background: linear-gradient(152deg, var(--ink-800) 0%, var(--navy-600) 100%);
  color: var(--text-on-dark);
  padding: clamp(28px, 4vw, 44px) clamp(24px, 3.4vw, 38px);
  clip-path: polygon(0 0, 100% 7%, 100% 100%, 0 93%);
  align-self: center;
}

.page-about .manifesto p {
  margin: 0;
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.72;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-about .manifesto p::before {
  content: "";
  display: block;
  width: 44px;
  height: 2px;
  background: var(--signal);
  margin-bottom: 20px;
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline .lede {
  margin-top: 16px;
}

.page-about .year-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .year-jump a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-text-2);
  text-decoration: none;
  padding: 9px 14px;
  border: 1px solid rgba(42, 63, 99, 0.35);
  border-radius: 999px;
  transition: color 120ms var(--ease), border-color 120ms var(--ease), background 120ms var(--ease);
}

.page-about .year-jump a:hover,
.page-about .year-jump a:focus-visible {
  color: var(--paper);
  background: var(--navy-600);
  border-color: var(--navy-600);
}

.page-about .timeline {
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-about .year-node {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding-block: clamp(24px, 3.4vw, 38px);
  border-top: 1px solid rgba(42, 63, 99, 0.32);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .year-node__scale {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .year-node__year {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--navy-600);
  transition: color 140ms var(--ease);
}

.page-about .year-node__tag {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--ink-text-2);
  text-transform: uppercase;
}

.page-about .year-node__body .h3 {
  margin: 0;
}

.page-about .year-node__body p {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-text-2);
  max-width: 36em;
}

.page-about .year-node__body .year-node__meaning {
  margin-top: 16px;
  padding-left: 14px;
  border-left: 2px solid var(--signal);
  color: var(--ink-text);
  font-size: 15px;
}

.page-about .year-node:target {
  background: rgba(231, 226, 214, 0.72);
}

.page-about .year-node:target .year-node__year {
  color: var(--signal);
}

@media (min-width: 860px) {
  .page-about .year-node {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 0 clamp(28px, 4vw, 64px);
    padding-block: clamp(30px, 3.6vw, 46px);
  }

  .page-about .year-node__scale {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-right: 20px;
    border-right: 1px solid rgba(42, 63, 99, 0.26);
    position: relative;
  }

  .page-about .year-node__scale::before {
    content: "";
    position: absolute;
    right: -4px;
    top: 14px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--line);
  }

  .page-about .year-node:target .year-node__scale::before {
    background: var(--signal);
  }
}

/* ---------- 旁注带 ---------- */

.page-about .interlude {
  background: var(--paper-2);
  border-top: 1px solid rgba(42, 63, 99, 0.28);
  border-bottom: 1px solid rgba(42, 63, 99, 0.28);
}

.page-about .interlude__inner {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding-block: clamp(24px, 3.4vw, 38px);
}

.page-about .interlude__mark {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--signal);
  line-height: 1.8;
}

.page-about .interlude p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

/* ---------- 团队 ---------- */

.page-about .about-team .lede {
  margin-top: 16px;
}

.page-about .about-team .h2 {
  color: var(--text-on-dark);
}

.page-about .about-team .lede {
  color: var(--text-on-dark);
  opacity: 0.86;
}

.page-about .team-tabs {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .team-tabs > .segmented {
  margin-bottom: 22px;
}

.page-about .team-tabs__panels {
  display: grid;
  gap: 22px;
}

.page-about .team-panel {
  background: rgba(27, 51, 88, 0.5);
  border-left: 2px solid var(--line);
  padding: clamp(20px, 2.6vw, 30px);
}

.page-about .team-panel[hidden] {
  display: none;
}

.page-about .team-panel__title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--signal-soft);
}

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

.page-about .duty-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(42, 63, 99, 0.75);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-on-dark);
}

.page-about .duty-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .duty-list__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ice);
}

.page-about .team-figure {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .team-figure .figure__cap {
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .team-tabs > .segmented {
    display: none;
  }

  .page-about .team-tabs__panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(20px, 2.6vw, 36px);
  }

  .page-about .team-panel[hidden] {
    display: block;
  }
}

/* ---------- 合作生态 ---------- */

.page-about .partner-grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .partner-grid__body .h2 {
  margin-top: 14px;
}

.page-about .partner-grid__body .prose {
  margin-top: 20px;
  max-width: 34em;
}

.page-about .partner-modes {
  margin: clamp(24px, 3vw, 36px) 0 0;
  display: grid;
  gap: 0;
}

.page-about .partner-modes > div {
  padding-block: 20px;
  border-top: 1px solid rgba(42, 63, 99, 0.28);
  display: grid;
  gap: 8px;
}

.page-about .partner-modes > div:last-child {
  border-bottom: 1px solid rgba(42, 63, 99, 0.28);
}

.page-about .partner-modes dt {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink-text);
}

.page-about .partner-modes dt::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--signal);
  vertical-align: middle;
  margin-right: 10px;
}

.page-about .partner-modes dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
  max-width: 34em;
}

.page-about .partner-figure {
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .partner-modes > div {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 0 clamp(20px, 3vw, 40px);
    align-items: baseline;
  }
}

/* ---------- 选题 ---------- */

.page-about .about-topics .lede {
  margin-top: 16px;
}

.page-about .topic-list {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .topic-list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding-block: clamp(20px, 2.6vw, 30px);
  border-top: 1px solid rgba(42, 63, 99, 0.26);
}

.page-about .topic-list li:last-child {
  border-bottom: 1px solid rgba(42, 63, 99, 0.26);
}

.page-about .topic-list__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--signal);
  padding-top: 5px;
}

.page-about .topic-list .h3 {
  margin: 0;
}

.page-about .topic-list p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
  max-width: 36em;
}

.page-about .topic-cases {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 18px;
}

.page-about .case {
  background: var(--paper);
  border-left: 2px solid var(--pitch);
  padding: clamp(20px, 2.6vw, 28px);
}

.page-about .case p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-about .case .case__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--pitch);
  margin-bottom: 10px;
}

@media (min-width: 860px) {
  .page-about .topic-cases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 36px);
  }
}

/* ---------- 收束 ---------- */

.page-about .about-next {
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__inner {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-next__copy .h2 {
  margin-top: 14px;
  color: var(--text-on-dark);
}

.page-about .about-next__copy .lede {
  margin-top: 18px;
  color: var(--text-on-dark);
  opacity: 0.86;
  max-width: 40em;
}

.page-about .about-next__actions {
  margin-top: clamp(24px, 3vw, 34px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__actions .btn__arrow {
  margin-left: 8px;
}

.page-about .about-next__aside {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-about .about-next__aside .note {
  margin: 0;
  color: var(--muted);
  border-left-color: var(--signal);
}

.page-about .about-next__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: var(--signal-soft);
  text-decoration: none;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--signal);
}

@media (min-width: 900px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.55fr);
    align-items: start;
  }

  .page-about .about-next__aside {
    border-top: 1px solid var(--line);
    padding-top: 26px;
  }
}
<<<PAGE_CSS_DONE>>>