.page-about {
  background: var(--zk-paper);
  color: var(--zk-ink);
  font-family: var(--zk-font-body);
  overflow-x: clip;
}

.page-about .ab-hero {
  padding-top: clamp(24px, 4vw, 48px);
  background: linear-gradient(158deg, var(--zk-paper) 0 58%, var(--zk-mist) 58% 100%);
}

.page-about .ab-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .ab-hero__title {
  font-family: var(--zk-font-display);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--zk-abyss);
}

.page-about .ab-hero__lead {
  margin-top: 18px;
  max-width: 54ch;
  color: var(--zk-ink);
}

.page-about .ab-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
}

.page-about .ab-hero__facts li {
  border-left: var(--zk-line) solid var(--zk-gold);
  padding-left: 12px;
}

.page-about .ab-hero__facts b {
  display: block;
  font-family: var(--zk-font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--zk-green);
}

.page-about .ab-hero__facts span {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--zk-salt);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .ab-hero__figure {
  margin: 0;
}

.page-about .ab-hero__figure .zk-figure__frame {
  border: var(--zk-border) solid var(--zk-abyss);
  box-shadow: var(--zk-shadow);
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

.page-about .ab-hero__figure .zk-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-hero__figure .zk-figure__caption {
  margin-top: 12px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--zk-salt);
}

/* 章节通用头 */
.page-about .ab-head {
  max-width: 62ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .ab-head .zk-h2 {
  margin: 10px 0 0;
  font-family: var(--zk-font-display);
  color: var(--zk-abyss);
}

.page-about .ab-head__lead {
  margin-top: 14px;
}

.page-about .ab-head--inverse .zk-h2 {
  color: var(--zk-paper);
}

.page-about .ab-head--inverse .ab-head__lead {
  color: var(--zk-mist);
}

/* 编年史 */
.page-about .ab-chronicle {
  background: var(--zk-paper);
}

.page-about .ab-chronicle__banner {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .ab-chronicle__banner .zk-figure__frame {
  border: var(--zk-border) solid var(--zk-green);
  box-shadow: var(--zk-shadow);
  aspect-ratio: 10 / 7;
  max-height: 340px;
  overflow: hidden;
}

.page-about .ab-chronicle__banner .zk-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-chronicle__layout {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: start;
}

.page-about .ab-index {
  background: var(--zk-green);
  color: var(--zk-paper);
  border: var(--zk-border) solid var(--zk-abyss);
  box-shadow: var(--zk-shadow);
  padding: 18px 18px 16px;
}

.page-about .ab-index .zk-index__title {
  margin: 0 0 12px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--zk-gold);
}

.page-about .ab-index .zk-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .ab-index .zk-index__link {
  display: block;
  padding: 9px 10px 9px 14px;
  border-left: var(--zk-line) solid transparent;
  color: var(--zk-mist);
  font-family: var(--zk-font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: color 160ms var(--zk-ease), border-color 160ms var(--zk-ease), background 160ms var(--zk-ease);
}

.page-about .ab-index .zk-index__link:hover,
.page-about .ab-index .zk-index__link:focus-visible {
  color: var(--zk-paper);
  background: rgba(247, 243, 232, 0.08);
}

.page-about .ab-index .zk-index__link[aria-current="true"] {
  border-left-color: var(--zk-coral);
  color: var(--zk-paper);
  background: rgba(255, 106, 61, 0.16);
}

.page-about .ab-era {
  position: relative;
  padding-left: 20px;
  border-left: var(--zk-line) solid var(--zk-mist);
}

.page-about .ab-era + .ab-era {
  margin-top: clamp(30px, 5vw, 52px);
}

.page-about .ab-era::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 8px;
  width: 13px;
  height: 13px;
  background: var(--zk-gold);
  border: var(--zk-border) solid var(--zk-abyss);
}

.page-about .ab-era__year {
  display: inline-block;
  margin: 0;
  padding: 5px 10px;
  background: var(--zk-abyss);
  color: var(--zk-gold);
  font-family: var(--zk-font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.page-about .ab-era .zk-h3 {
  margin: 14px 0 10px;
  font-family: var(--zk-font-display);
  color: var(--zk-green);
}

.page-about .ab-era__text {
  margin: 0 0 18px;
  max-width: 62ch;
  color: var(--zk-ink);
}

.page-about .ab-era__cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* 版本卡片 */
.page-about .ab-version {
  background: var(--zk-paper);
  border: var(--zk-border) solid var(--zk-abyss);
  box-shadow: var(--zk-shadow);
  transition: box-shadow 180ms var(--zk-ease), border-color 180ms var(--zk-ease);
}

.page-about .ab-version:hover {
  border-color: var(--zk-coral);
  box-shadow: 12px 12px 0 rgba(6, 43, 63, 0.16);
}

.page-about .ab-version__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--zk-abyss);
}

.page-about .ab-version__summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-version__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--zk-font-mono);
  font-size: 17px;
  color: var(--zk-coral);
}

.page-about .ab-version[open] .ab-version__summary::after {
  content: "\2212";
}

.page-about .ab-version__num {
  display: inline-block;
  padding: 2px 7px;
  background: var(--zk-coral);
  color: var(--zk-ink);
  font-family: var(--zk-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.page-about .ab-version__name {
  flex: 1 1 12ch;
  min-width: 0;
}

.page-about .ab-version__meta {
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--zk-salt);
}

.page-about .ab-version__body {
  border-top: var(--zk-border) solid var(--zk-mist);
  padding: 14px 16px 18px;
  background: var(--zk-mist);
}

.page-about .ab-version__body p {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--zk-ink);
}

.page-about .ab-version__body ul {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--zk-abyss);
}

.page-about .ab-version__body li {
  margin-bottom: 4px;
}

/* 团队 */
.page-about .ab-team {
  background: var(--zk-mist);
  border-top: var(--zk-line) solid var(--zk-abyss);
  border-bottom: var(--zk-line) solid var(--zk-abyss);
}

.page-about .ab-team__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .ab-team .zk-h2 {
  margin: 10px 0 16px;
  font-family: var(--zk-font-display);
  color: var(--zk-abyss);
}

.page-about .ab-team__text p {
  margin: 0 0 14px;
  max-width: 60ch;
}

.page-about .ab-team__stats {
  list-style: none;
  margin: 22px 0 24px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(104px, 1fr));
  gap: 12px;
}

.page-about .ab-team__stats li {
  background: var(--zk-paper);
  border: var(--zk-border) solid var(--zk-abyss);
  padding: 12px 14px;
}

.page-about .ab-team__stats b {
  display: block;
  font-family: var(--zk-font-display);
  font-size: 30px;
  line-height: 1.05;
  color: var(--zk-green);
}

.page-about .ab-team__stats span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--zk-salt);
}

.page-about .ab-team__link {
  margin: 0;
}

.page-about .ab-team__figure {
  margin: 0;
}

.page-about .ab-team__figure .zk-figure__frame {
  border: var(--zk-border) solid var(--zk-abyss);
  box-shadow: var(--zk-shadow);
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

.page-about .ab-team__figure .zk-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-team__figure .zk-figure__caption {
  margin-top: 12px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  color: var(--zk-salt);
}

/* 规模数据牌 */
.page-about .ab-scale {
  background: var(--zk-abyss);
  color: var(--zk-paper);
}

.page-about .ab-scale__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-scale__item {
  border: var(--zk-border) solid rgba(247, 243, 232, 0.28);
  padding: 20px 18px;
  background: rgba(11, 79, 74, 0.35);
}

.page-about .ab-scale__num {
  margin: 0;
  font-family: var(--zk-font-display);
  font-weight: 800;
  font-size: clamp(38px, 7vw, 58px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--zk-paper);
}

.page-about .ab-scale__label {
  margin: 8px 0 0;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--zk-gold);
}

.page-about .ab-scale__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--zk-mist);
}

/* 三件事 */
.page-about .ab-promise {
  background: var(--zk-paper);
}

.page-about .ab-promise__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-promise__item {
  background: var(--zk-paper);
  border: var(--zk-border) solid var(--zk-abyss);
  box-shadow: var(--zk-shadow);
  padding: 22px 20px 24px;
}

.page-about .ab-promise__no {
  margin: 0 0 10px;
  font-family: var(--zk-font-mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--zk-coral);
}

.page-about .ab-promise__item .zk-h3 {
  margin: 0 0 10px;
  font-family: var(--zk-font-display);
  color: var(--zk-green);
}

.page-about .ab-promise__item p:last-child {
  margin: 0;
  font-size: 15px;
}

.page-about .ab-promise__more {
  margin: 24px 0 0;
}

/* 行业观察 */
.page-about .ab-voices {
  background: var(--zk-paper);
  border-top: var(--zk-line) solid var(--zk-mist);
}

.page-about .ab-eyebrow--wine {
  display: inline-block;
  background: var(--zk-wine);
  color: var(--zk-paper);
  padding: 4px 10px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .ab-voices__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .ab-voices__item {
  margin: 0;
  padding: 4px 0 4px 18px;
  border-left: var(--zk-line) solid var(--zk-wine);
}

.page-about .ab-voices__tag {
  margin: 0 0 8px;
  font-family: var(--zk-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--zk-wine);
}

.page-about .ab-voices__quote {
  margin: 0 0 10px;
  font-family: var(--zk-font-display);
  font-size: clamp(20px, 3vw, 25px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--zk-abyss);
}

.page-about .ab-voices__text {
  margin: 0;
  font-size: 15px;
  color: var(--zk-ink);
}

.page-about .ab-voices__note {
  margin: 26px 0 0;
  max-width: 66ch;
  font-size: 15px;
  color: var(--zk-salt);
}

/* 结尾入口 */
.page-about .ab-cta {
  background: var(--zk-mist);
  border-top: var(--zk-line) solid var(--zk-abyss);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
  padding-top: 8px;
}

.page-about .ab-cta__text .zk-h2 {
  margin: 0 0 12px;
  font-family: var(--zk-font-display);
  color: var(--zk-abyss);
}

.page-about .ab-cta__text p {
  margin: 0;
  max-width: 56ch;
}

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

@media (min-width: 760px) {
  .page-about .ab-scale__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-promise__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-hero__figure {
    transform: rotate(-1.2deg);
  }

  .page-about .ab-voices__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .ab-era-list .ab-era:nth-child(even) .ab-era__cards {
    margin-left: clamp(14px, 3vw, 38px);
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(34px, 5vw, 68px);
  }

  .page-about .ab-chronicle__layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--zk-header-h) + 18px);
  }

  .page-about .ab-team__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .ab-scale__grid {
    grid-template-columns: 1.35fr 1fr 1fr 1.1fr;
  }

  .page-about .ab-promise__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-hero__figure {
    transform: none;
  }

  .page-about .ab-version,
  .page-about .ab-index .zk-index__link {
    transition: none;
  }
}