.page-about {
  --about-axis: 28px;
  --about-node: 13px;
  display: block;
  background: var(--ink);
  color: var(--ink-soft);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: calc(var(--header-h) + 36px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-about .about-hero__lead {
  max-width: 780px;
  padding-top: clamp(20px, 4vw, 48px);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(54px, 12vw, 130px);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--paper);
}

.page-about .about-hero__sub {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 2.3vw, 24px);
  line-height: 1.5;
  color: var(--gold-hi);
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink-soft);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(28px, 6vw, 72px);
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__facts .num {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--gold-hi);
}

.page-about .about-hero__facts span:last-child {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* ---------- 顶部窄幅横幅 ---------- */
.page-about .about-band {
  position: relative;
  margin: clamp(34px, 5vw, 56px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, rgba(6, 13, 22, 0.55), rgba(6, 13, 22, 0) 45%, rgba(6, 13, 22, 0.6));
}

/* ---------- 章节刻度 ---------- */
.page-about .section-ticks {
  top: 50%;
}

/* ---------- 主轴与堆叠章节 ---------- */
.page-about .about-flow {
  position: relative;
  padding-top: clamp(60px, 9vw, 116px);
  padding-bottom: clamp(24px, 4vw, 48px);
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: clamp(60px, 9vw, 116px);
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--line) 0, var(--line) 88%, rgba(212, 165, 68, 0));
  pointer-events: none;
}

.page-about .about-sec {
  position: relative;
  padding-left: clamp(48px, 9vw, 68px);
  padding-bottom: clamp(52px, 7vw, 92px);
}

.page-about .about-sec:last-child {
  padding-bottom: clamp(16px, 3vw, 28px);
}

.page-about .about-sec__node {
  position: absolute;
  left: var(--about-axis);
  top: 8px;
  width: var(--about-node);
  height: var(--about-node);
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  box-shadow: 0 0 0 5px var(--ink);
  z-index: 2;
  transition: background-color 0.32s var(--ease), border-color 0.32s var(--ease), box-shadow 0.32s var(--ease);
}

.page-about .about-sec:target .about-sec__node,
.page-about .about-sec.is-current .about-sec__node {
  background: var(--gold);
  border-color: var(--gold-hi);
  box-shadow: 0 0 0 5px var(--ink), 0 0 0 7px rgba(212, 165, 68, 0.28);
}

.page-about .about-sec__idx {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-sec__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-sec__inner > p {
  max-width: 38em;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.95;
}

/* ---------- 数据条 ---------- */
.page-about .about-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
}

.page-about .about-facts__num {
  font-size: 18px;
  line-height: 1;
  color: var(--gold-hi);
}

.page-about .about-facts__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 五大板块 ---------- */
.page-about .pillar-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .pillar-list__item {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 22px;
  background: var(--ink-2);
  border-top: 1px solid transparent;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .pillar-list__item:hover,
.page-about .pillar-list__item:focus-within {
  background: var(--ink-2-hi);
  border-top-color: var(--gold);
}

.page-about .pillar-list__idx {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.page-about .pillar-list__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .pillar-list__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .pillar-list__link {
  margin-top: auto;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-about .pillar-list__link:hover,
.page-about .pillar-list__link:focus-visible {
  color: var(--gold-hi);
  border-color: var(--gold-hi);
}

/* ---------- 版本演进 ---------- */
.page-about .ver-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 24px 0 0;
}

.page-about .version-badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold-hi);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.page-about .version-badge:hover,
.page-about .version-badge:focus-visible {
  border-color: var(--gold-hi);
  background: rgba(212, 165, 68, 0.12);
}

.page-about .version-badge[data-copied="true"] {
  border-color: var(--jade);
  color: var(--jade);
}

.page-about .version-note {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--jade);
  min-height: 1.4em;
}

.page-about .ver-track {
  margin: 20px 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ver-card {
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}

.page-about .ver-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ver-hue, var(--copper));
  opacity: 0.85;
}

.page-about .ver-card--v1 { --ver-hue: #7C8FA3; }
.page-about .ver-card--v2 { --ver-hue: #3FA98A; }
.page-about .ver-card--v3 { --ver-hue: #D4A544; }
.page-about .ver-card--v4 { --ver-hue: #C8402F; }

.page-about .ver-card__trigger {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 18px 20px 22px;
  background: transparent;
  border: 0;
  text-align: left;
  color: inherit;
  cursor: pointer;
  transition: background-color 0.18s var(--ease);
}

.page-about .ver-card__trigger:hover,
.page-about .ver-card__trigger:focus-visible {
  background: var(--ink-2);
}

.page-about .ver-card__trigger[aria-expanded="true"] {
  background: var(--ink-2);
}

.page-about .ver-card__code {
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--gold-hi);
}

.page-about .ver-card__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .ver-card__year {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
  white-space: nowrap;
}

.page-about .ver-card__sign {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-about .ver-card__sign::before,
.page-about .ver-card__sign::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-about .ver-card__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-about .ver-card__sign::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
}

.page-about .ver-card__trigger[aria-expanded="true"] .ver-card__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .ver-card__panel {
  padding: 0 22px 22px;
  background: var(--ink-2);
}

.page-about .ver-card__panel p {
  max-width: 44em;
  margin: 0;
  padding-top: 4px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
}

/* ---------- 器物图 ---------- */
.page-about .about-plate {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-about .about-plate::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(125% 105% at 50% 0%, rgba(6, 13, 22, 0) 38%, rgba(6, 13, 22, 0.72) 100%);
}

.page-about .about-plate--gear {
  width: min(100%, 620px);
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .about-plate--gear figcaption {
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
  border-top: 1px solid var(--line-soft);
  position: relative;
  z-index: 1;
  background: var(--ink-2);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin: 28px 0 0;
  align-items: start;
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .team-grid__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 20px;
  background: var(--ink-2);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .team-grid__item::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color 0.2s var(--ease);
}

.page-about .team-grid__item:hover::after,
.page-about .team-grid__item:focus-visible::after {
  border-color: var(--gold);
}

.page-about .team-grid__item:hover,
.page-about .team-grid__item:focus-visible {
  background: var(--ink-2-hi);
  outline: none;
}

.page-about .team-grid__count {
  font-size: 30px;
  line-height: 1;
  color: var(--gold-hi);
}

.page-about .team-grid__name {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--paper);
}

.page-about .team-grid__role {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--steel);
  transition: color 0.2s var(--ease);
}

.page-about .team-grid__item:hover .team-grid__role,
.page-about .team-grid__item:focus-visible .team-grid__role {
  color: var(--ink-soft);
}

.page-about .about-plate--tokens {
  width: 100%;
}

/* ---------- 巡检说明 ---------- */
.page-about .team-note {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--jade);
  background: var(--ink-2);
}

.page-about .team-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 46em;
}

/* ---------- 收尾 ---------- */
.page-about .about-outro {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(48px, 7vw, 84px) 0;
  background: var(--ink-3);
  border-top: 1px solid var(--line);
}

.page-about .about-outro__inner {
  display: grid;
  gap: 12px;
}

.page-about .about-outro__idx {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-about .about-outro__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-outro__text {
  margin: 0;
  max-width: 42em;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .pillar-list {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 900px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .pillar-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .pillar-list__item:nth-child(4),
  .page-about .pillar-list__item:nth-child(5) {
    grid-column: span 1;
  }
}

@media (min-width: 980px) {
  .page-about {
    --about-axis: 50%;
  }

  .page-about .about-flow::before {
    left: 50%;
    top: clamp(60px, 9vw, 116px);
  }

  .page-about .about-sec {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(48px, 6vw, 96px);
    padding-left: 0;
    padding-bottom: clamp(64px, 6vw, 104px);
  }

  .page-about .about-sec__node {
    left: 50%;
    top: 12px;
  }

  .page-about .about-sec:nth-child(odd) .about-sec__inner {
    grid-column: 1;
    padding-right: 28px;
  }

  .page-about .about-sec:nth-child(even) .about-sec__inner {
    grid-column: 2;
    padding-left: 28px;
    margin-top: clamp(36px, 4vw, 64px);
  }

  .page-about .about-sec--wide .about-sec__inner {
    grid-column: 1 / -1;
    margin-top: 0;
    padding-right: 0;
    padding-left: 0;
  }

  .page-about .about-sec--wide .about-sec__inner > p,
  .page-about .about-sec--wide .pillar-list,
  .page-about .about-sec--wide .ver-track,
  .page-about .about-sec--wide .team-layout,
  .page-about .about-sec--wide .team-note {
    max-width: none;
  }

  .page-about .pillar-list {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-about .about-plate--gear {
    margin-top: 40px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-sec__title {
    font-size: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>