.page-about {
  --about-line: rgba(166, 184, 198, .2);
  --about-line-strong: rgba(166, 184, 198, .36);
  --about-paper-ink: #0A0E13;
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .breadcrumb {
  padding: 22px 0 0;
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--graphite);
}
.page-about .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 64px;
}
.page-about .about-hero__slab {
  position: absolute;
  top: -22%;
  right: -34%;
  width: min(780px, 94%);
  height: 142%;
  background: linear-gradient(158deg, rgba(18, 60, 96, .95) 8%, rgba(4, 22, 42, 0) 74%);
  transform: skewX(-10deg) rotate(-3deg);
  pointer-events: none;
}
.page-about .about-hero__glow {
  position: absolute;
  left: -20%;
  bottom: -38%;
  width: 64%;
  height: 92%;
  background: radial-gradient(closest-side, rgba(47, 230, 214, .16), rgba(4, 22, 42, 0) 72%);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 34px;
}
.page-about .about-hero__kicker {
  color: var(--cyan);
  margin: 0 0 18px;
}
.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(2.35rem, 9.5vw, 4.6rem);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -.02em;
}
.page-about .about-hero__lede {
  max-width: 34em;
  margin: 22px 0 0;
  color: var(--mist);
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}
.page-about .about-hero__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about .about-hero__meta li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}
.page-about .about-hero__card {
  padding: 22px 20px 18px;
  border-radius: 4px 26px 4px 26px;
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
  margin-top: 14px;
}
.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-hero__stats .stat__value {
  font-size: 1.5rem;
  line-height: 1.1;
}
.page-about .about-hero__stats .stat__label {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}
.page-about .about-hero__cardfoot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 两栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding: 8px 0 72px;
}
.page-about .about-toc {
  display: none;
}
.page-about .about-body {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: 34px 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 12px;
}
.page-about .about-section__num {
  color: var(--cyan);
  margin: 0 0 10px;
}
.page-about .about-section__title {
  margin: 0 0 18px;
  font-size: clamp(1.55rem, 5.4vw, 2.3rem);
  line-height: 1.16;
  font-weight: 850;
  letter-spacing: -.015em;
}
.page-about .about-lead-p,
.page-about .about-after-table,
.page-about .about-axis__text,
.page-about .about-source__text,
.page-about .about-role__text,
.page-about .about-crosscheck__text p,
.page-about .about-aside p,
.page-about .about-note p,
.page-about .about-outro__text {
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--paper);
}
.page-about .about-section .about-lead-p {
  margin: 0 0 24px;
}
.page-about .about-after-table {
  margin: 22px 0 0;
}

/* ---------- 来源列表 ---------- */
.page-about .about-sources {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-source {
  padding: 20px 0 20px 18px;
  border-left: 2px solid var(--about-line-strong);
}
.page-about .about-source + .about-source {
  margin-top: 6px;
}
.page-about .about-source__name {
  margin: 0 0 8px;
  color: var(--paper);
}
.page-about .about-source__text {
  margin: 0;
}
.page-about .about-source__edge {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-source__edge .dot {
  margin-top: 7px;
  flex: none;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
}
.page-about .about-figure .figure__frame {
  overflow: hidden;
  border-radius: 2px 22px 2px 22px;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure .figure__caption {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-figure--rail {
  margin-bottom: 30px;
}

/* ---------- 旁注与折叠 ---------- */
.page-about .about-note {
  margin: 26px 0 0;
  padding: 14px 16px 16px;
  border-left: 2px solid var(--cyan);
  background: rgba(47, 230, 214, .05);
}
.page-about .about-note__summary {
  cursor: pointer;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  list-style: none;
}
.page-about .about-note__summary::-webkit-details-marker {
  display: none;
}
.page-about .about-note__summary::after {
  content: " +";
  font-family: var(--font-mono);
}
.page-about .about-note[open] .about-note__summary::after {
  content: " −";
}
.page-about .about-note p {
  margin: 12px 0 0;
  color: var(--mist);
}
.page-about .about-aside {
  margin: 26px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--cyan);
  background: var(--ink-800);
  border-radius: 0 18px 0 18px;
}
.page-about .about-aside__title {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.page-about .about-aside p {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
}

/* ---------- 双轴 ---------- */
.page-about .about-axes {
  display: grid;
  gap: 18px;
}
.page-about .about-axis {
  padding: 22px 20px;
  background: var(--ink-800);
  border: 1px solid var(--about-line);
  border-radius: 2px 24px 2px 24px;
}
.page-about .about-axis__kind {
  margin: 0 0 12px;
  color: var(--mist);
}
.page-about .about-axis__formula {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.45rem, 6.4vw, 2.1rem);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
}
.page-about .about-axis__text {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
}
.page-about .about-axis__use {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--about-line-strong);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--orange);
}

/* ---------- 复核表 ---------- */
.page-about .about-table {
  margin-top: 4px;
}
.page-about .about-table__caption {
  padding: 0 0 12px;
  text-align: left;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
}
.page-about .about-table .table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .about-table th,
.page-about .about-table td {
  padding: 14px 14px 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--about-line);
  line-height: 1.68;
}
.page-about .about-table thead th {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--mist);
  background: var(--ink-700);
  border-bottom: 1px solid var(--about-line-strong);
  white-space: nowrap;
}
.page-about .about-table tbody tr:nth-child(even) {
  background: rgba(10, 42, 70, .5);
}
.page-about .about-table tbody td:first-child {
  position: relative;
  color: var(--cyan);
  font-weight: 700;
}
.page-about .about-table tbody tr {
  transition: background-color .2s ease;
}
.page-about .about-table tbody tr:hover {
  background: rgba(47, 230, 214, .07);
}
.page-about .about-table tbody tr:hover td:first-child::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  background: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 4px 0 0 26px;
  list-style: none;
  counter-reset: about-ver;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1.5px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 230, 214, .08));
}
.page-about .about-timeline__item {
  position: relative;
  padding: 16px 0 18px;
  outline: none;
}
.page-about .about-timeline__item + .about-timeline__item {
  border-top: 1px dashed var(--about-line);
}
.page-about .about-timeline__node {
  position: absolute;
  left: -26px;
  top: 22px;
  width: 15px;
  height: 15px;
  border: 2px solid var(--cyan);
  background: var(--ink-900);
  border-radius: 50%;
  transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}
.page-about .about-timeline__item:hover .about-timeline__node,
.page-about .about-timeline__item:focus-visible .about-timeline__node {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.16);
}
.page-about .about-timeline__item:focus-visible {
  box-shadow: 0 0 0 2px rgba(47, 230, 214, .55);
  border-radius: 3px;
}
.page-about .about-timeline__ver {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--cyan);
}
.page-about .about-timeline__name {
  margin: 0 0 8px;
  font-size: 1.06rem;
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-about .about-timeline__brief {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-timeline__detail {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height .32s ease, opacity .28s ease, margin-top .28s ease;
}
.page-about .about-timeline__detail p {
  margin: 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  border-left: 2px solid var(--orange);
  padding-left: 14px;
}
.page-about .about-timeline__item:hover .about-timeline__detail,
.page-about .about-timeline__item:focus-within .about-timeline__detail,
.page-about .about-timeline__item:focus .about-timeline__detail {
  max-height: 240px;
  opacity: 1;
  margin-top: 14px;
}

/* ---------- 团队 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 14px;
}
.page-about .about-role {
  padding: 20px 18px;
  border: 1px solid var(--about-line);
  border-radius: 22px 2px 22px 2px;
  background: linear-gradient(160deg, rgba(10, 42, 70, .9), rgba(4, 22, 42, .9));
}
.page-about .about-role__value {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}
.page-about .about-role__value--hot {
  color: var(--orange);
}
.page-about .about-role__name {
  margin: 10px 0 8px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}
.page-about .about-role__text {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 外部核对 ---------- */
.page-about .about-crosscheck {
  display: grid;
  gap: 24px;
}
.page-about .about-crosscheck__figure {
  margin: 0;
}
.page-about .about-crosscheck__figure .figure__frame {
  overflow: hidden;
  border-radius: 20px 2px 20px 2px;
}
.page-about .about-crosscheck__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}
.page-about .about-crosscheck__figure .figure__caption {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-crosscheck__text p {
  margin: 0 0 16px;
  color: var(--mist);
}
.page-about .about-states {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}
.page-about .about-states li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-states .dot {
  flex: none;
  transform: translateY(-2px);
}
.page-about .about-states__name {
  color: var(--paper);
  font-weight: 700;
  letter-spacing: .04em;
  flex: none;
}
.page-about .about-states__desc {
  color: var(--mist);
}

/* ---------- 收束区块（沙白纸） ---------- */
.page-about .about-outro {
  color: var(--about-paper-ink);
}
.page-about .about-outro__grid {
  display: grid;
  gap: 32px;
}
.page-about .about-outro__kicker {
  color: var(--ink-700);
  margin: 0 0 14px;
}
.page-about .about-outro__title {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 5.6vw, 2.25rem);
  line-height: 1.16;
  font-weight: 850;
  letter-spacing: -.015em;
  color: var(--about-paper-ink);
}
.page-about .about-outro__text {
  margin: 0;
  color: rgba(10, 14, 19, .78);
}
.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.page-about .about-outro__actions .btn--ghost {
  border-color: rgba(10, 14, 19, .35);
  color: var(--about-paper-ink);
}
.page-about .about-outro__actions .btn--ghost:hover {
  border-color: var(--ink-700);
}
.page-about .about-cadence {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(10, 14, 19, .18);
}
.page-about .about-cadence li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(10, 14, 19, .18);
  font-size: 13.5px;
  line-height: 1.65;
}
.page-about .about-cadence__key {
  color: rgba(10, 14, 19, .72);
  letter-spacing: .04em;
}
.page-about .about-cadence__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--ink-700);
}
.page-about .about-outro__top {
  margin: 24px 0 0;
  font-size: 12.5px;
  letter-spacing: .14em;
}
.page-about .about-outro__top a {
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 60, 96, .4);
}
.page-about .about-outro__top a:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 48px 0 84px;
  }
  .page-about .about-axes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-crosscheck {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
    gap: 32px;
  }
  .page-about .about-outro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 48px;
    padding: 56px 0 96px;
  }
  .page-about .about-toc {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(250px, 4fr);
    align-items: end;
    gap: 46px;
  }
  .page-about .about-hero__card {
    transform: translateY(46px);
  }
}

@media (min-width: 1180px) {
  .page-about .about-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 72px;
  }
  .page-about .about-section {
    padding: 46px 0;
  }
  .page-about .about-figure--rail {
    margin-top: 34px;
  }
}

/* ---------- 目录样式（限定在本页作用域） ---------- */
.page-about .about-toc .toc__title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}
.page-about .about-toc .toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-toc .toc__list li + li {
  margin-top: 2px;
}
.page-about .about-toc .toc__link {
  display: block;
  padding: 9px 0 9px 13px;
  border-left: 2px solid var(--about-line);
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: .05em;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .about-toc .toc__link:hover {
  color: var(--paper);
}
.page-about .about-toc .toc__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__detail,
  .page-about .about-timeline__node,
  .page-about .about-toc .toc__link,
  .page-about .about-table tbody tr,
  .page-about .about-hero__card {
    transition: none;
  }
  .page-about .about-hero__card {
    transform: none;
  }
  .page-about .about-timeline__item:hover .about-timeline__detail,
  .page-about .about-timeline__item:focus .about-timeline__detail {
    max-height: 240px;
    opacity: 1;
  }
}
<<<END>>>