.page-about {
  --ab-rail: 176px;
  --ab-gap: 44px;
  --ab-hair: rgba(42, 59, 82, .78);
  --ab-hair-soft: rgba(42, 59, 82, .46);
}

.page-about .about-crumb {
  padding-top: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--ab-hair-soft);
}

.page-about .about-hero__text {
  min-width: 0;
}

.page-about .about-hero .eyebrow {
  color: var(--gold);
}

.page-about .about-hero__title {
  font-family: var(--f-sans);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.07;
  letter-spacing: -.025em;
  color: var(--on-dark);
  margin: 12px 0 20px;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold);
  box-shadow: inset 0 -.16em 0 rgba(201, 162, 39, .3);
}

.page-about .about-hero__lede {
  font-size: 16px;
  line-height: 1.82;
  color: var(--on-dark-soft);
  max-width: 34em;
  margin: 0 0 26px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--ab-hair);
  background: linear-gradient(158deg, rgba(18, 42, 69, .92), rgba(5, 13, 24, .95));
  box-shadow: 16px 16px 0 -8px rgba(42, 59, 82, .24);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--ab-hair-soft);
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--on-dark-soft);
}

/* ---------- 指标条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--ab-hair-soft);
  border: 1px solid var(--ab-hair-soft);
}

.page-about .about-stats__item {
  min-width: 0;
  background: var(--ink-900);
  padding: 14px 16px;
}

.page-about .about-stats__item dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--on-dark-soft);
}

.page-about .about-stats__item dd {
  margin: 8px 0 0;
  font-family: var(--f-mono);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--gold-soft);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats__item dd .mono {
  color: var(--gold);
}

/* ---------- 主布局：章节刻度 + 内容流 ---------- */
.page-about .about-layout {
  padding: 40px 0 56px;
}

.page-about .about-toc {
  margin: 0 0 32px;
  padding: 14px 14px 16px;
  border: 1px solid var(--ab-hair-soft);
  background: rgba(8, 21, 39, .66);
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ab-hair-soft);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-toc__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 9px;
  border: 1px solid var(--ab-hair-soft);
  font-size: 13px;
  color: var(--on-dark-soft);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-toc__num {
  font-size: 11px;
  color: var(--gold);
  opacity: .8;
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a.is-active,
.page-about .about-toc__list a[aria-current] {
  color: var(--gold-soft);
  border-color: rgba(201, 162, 39, .55);
  background: rgba(201, 162, 39, .09);
}

.page-about .about-flow {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  scroll-margin-top: calc(var(--head-h) + 24px);
  min-width: 0;
}

.page-about .about-section__head {
  padding-top: 20px;
  margin-bottom: 24px;
  border-top: 1px solid var(--ab-hair-soft);
}

.page-about .about-section__head .eyebrow {
  color: var(--gold);
}

.page-about .about-section__head h2 {
  font-family: var(--f-sans);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--on-dark);
  margin: 10px 0 12px;
}

.page-about .about-section__lede {
  margin: 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

/* ---------- 团队卡片 ---------- */
.page-about .about-team__cols {
  display: grid;
  gap: 18px;
}

.page-about .about-card {
  position: relative;
  min-width: 0;
  padding: 22px 20px 18px;
  border: 1px solid var(--ab-hair);
  background: linear-gradient(180deg, rgba(18, 42, 69, .92), rgba(8, 21, 39, .94));
  box-shadow: 14px 14px 0 -6px rgba(42, 59, 82, .22), 0 18px 30px -26px rgba(0, 0, 0, .9);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-card:hover {
  transform: translateY(-3px);
  border-color: rgba(201, 162, 39, .5);
  box-shadow: 18px 18px 0 -6px rgba(42, 59, 82, .28), 0 26px 42px -30px rgba(0, 0, 0, .95);
}

.page-about .about-card__tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid rgba(201, 162, 39, .5);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--gold-soft);
}

.page-about .about-card h3 {
  margin: 14px 0 10px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--on-dark);
}

.page-about .about-card > p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--on-dark-soft);
}

.page-about .about-more {
  margin-top: 14px;
  border-top: 1px solid var(--ab-hair-soft);
}

.page-about .about-more summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}

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

.page-about .about-more summary::after {
  content: " +";
}

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

.page-about .about-more ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-more li {
  position: relative;
  padding-left: 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-about .about-more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--gold);
  opacity: .7;
}

/* ---------- 产出节奏 ---------- */
.page-about .about-cadence {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-hair-soft);
}

.page-about .about-cadence li {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--ab-hair-soft);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--on-dark-soft);
}

.page-about .about-cadence__k {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  padding-top: 3px;
}

/* ---------- 通用插图 ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
  padding: 8px;
  border: 1px solid var(--ab-hair-soft);
  background: var(--ink-900);
}

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

.page-about .about-figure figcaption {
  padding: 10px 4px 2px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--on-dark-soft);
}

/* ---------- 条目来源步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  counter-reset: ab-step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-hair-soft);
  border: 1px solid var(--ab-hair-soft);
}

.page-about .about-steps li {
  position: relative;
  min-width: 0;
  background: var(--ink-900);
  padding: 20px 20px 20px 64px;
}

.page-about .about-steps li::before {
  counter-increment: ab-step;
  content: counter(ab-step, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 21px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .about-steps h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--on-dark);
}

.page-about .about-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--on-dark-soft);
}

.page-about .callout {
  margin-top: 22px;
}

.page-about .callout a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 产能区间 ---------- */
.page-about .about-bars {
  display: grid;
  gap: 24px;
}

.page-about .about-bar {
  min-width: 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
}

.page-about .about-bar__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 10px;
}

.page-about .about-bar__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--on-dark);
}

.page-about .about-bar__val {
  font-size: 13.5px;
  color: var(--gold-soft);
  font-variant-numeric: tabular-nums;
}

.page-about .about-bar__track {
  height: 8px;
  background: rgba(42, 59, 82, .62);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  width: 30%;
  background: linear-gradient(90deg, rgba(201, 162, 39, .3), var(--gold));
  transform-origin: left center;
  animation: about-grow .8s var(--ease) both;
}

.page-about .about-bar--test .about-bar__fill {
  width: 11%;
}

.page-about .about-bar--stable .about-bar__fill {
  width: 33%;
}

.page-about .about-bar--bulk .about-bar__fill {
  width: 92%;
}

@keyframes about-grow {
  from { transform: scaleX(.05); }
  to { transform: scaleX(1); }
}

.page-about .about-bar p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--on-dark-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 4px 0 4px 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 162, 39, .7), rgba(42, 59, 82, .35));
}

.page-about .about-timeline__item {
  position: relative;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 17px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-950);
  border: 2px solid var(--gold);
}

.page-about .about-timeline summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  border: 1px solid var(--ab-hair-soft);
  background: rgba(8, 21, 39, .62);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

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

.page-about .about-timeline summary:hover {
  border-color: rgba(201, 162, 39, .55);
  background: rgba(18, 42, 69, .78);
}

.page-about .about-timeline details[open] summary {
  border-color: rgba(201, 162, 39, .6);
  background: rgba(18, 42, 69, .88);
}

.page-about .about-timeline__stage {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .about-timeline__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--on-dark);
}

.page-about .about-timeline__body {
  padding: 14px 16px 16px;
  border: 1px solid var(--ab-hair-soft);
  border-top: 0;
  background: rgba(5, 13, 24, .62);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: 12px;
}

.page-about .about-coverage__group {
  min-width: 0;
  border: 1px solid var(--ab-hair-soft);
  background: rgba(8, 21, 39, .62);
}

.page-about .about-coverage__group > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-about .about-coverage__group > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-coverage__group > summary::after {
  content: "+";
  font-family: var(--f-mono);
  font-size: 16px;
  color: var(--gold);
}

.page-about .about-coverage__group[open] > summary::after {
  content: "–";
}

.page-about .about-coverage__group[open] > summary {
  border-bottom: 1px solid var(--ab-hair-soft);
}

.page-about .about-coverage__list {
  list-style: none;
  margin: 0;
  padding: 14px 16px 16px;
  display: grid;
  gap: 9px;
}

.page-about .about-coverage__list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--on-dark-soft);
}

.page-about .about-coverage__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--gold);
  opacity: .72;
}

.page-about .about-coverage__list a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 22px;
  margin: 0 0 72px;
  padding: 28px 22px;
  border: 1px solid rgba(201, 162, 39, .35);
  background: linear-gradient(135deg, rgba(18, 42, 69, .92), rgba(5, 13, 24, .96));
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--f-sans);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--on-dark);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 40em;
  font-size: 14.8px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-about .about-cta a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-team__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-coverage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 36px 34px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 48px;
    align-items: end;
    padding: 44px 0 56px;
  }

  .page-about .about-hero__figure {
    margin-bottom: 4px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: var(--ab-gap);
    align-items: start;
    padding: 52px 0 72px;
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--head-h) + 20px);
    margin-bottom: 0;
  }

  .page-about .about-toc__list {
    display: block;
  }

  .page-about .about-toc__list li + li {
    margin-top: 2px;
  }

  .page-about .about-toc__list a {
    border: 0;
    border-left: 2px solid transparent;
    padding: 8px 10px;
  }

  .page-about .about-toc__list a:hover,
  .page-about .about-toc__list a.is-active,
  .page-about .about-toc__list a[aria-current] {
    border-color: transparent;
    border-left-color: var(--gold);
  }

  .page-about .about-flow {
    gap: 84px;
  }
}

@media (min-width: 1240px) {
  .page-about {
    --ab-rail: 196px;
    --ab-gap: 56px;
  }
}
<<<END>>>