.page-about {
  color: var(--zo-cream);
  font-family: var(--zo-font-body);
  overflow-x: clip;
}

.page-about .ab-wrap {
  padding-top: clamp(1.25rem, 4vw, 2.5rem);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

/* 面包屑 */
.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
  font-size: var(--zo-small, .875rem);
}
.page-about .ab-crumbs__sep {
  color: var(--zo-rock);
}

/* 首屏 */
.page-about .ab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: end;
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
  border-bottom: 2px solid var(--zo-line);
}
.page-about .ab-hero__copy {
  min-width: 0;
}
.page-about .ab-hero__title {
  margin: .6rem 0 0;
  font-family: var(--zo-font-head);
  font-size: clamp(2.1rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: .01em;
  font-weight: 900;
  color: var(--zo-cream);
  text-wrap: balance;
}
.page-about .ab-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: clamp(.98rem, 1.05vw, 1.1rem);
  line-height: 1.85;
  color: var(--zo-coldgray);
}
.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.5rem;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem;
  margin: 1.75rem 0 0;
}
.page-about .ab-stats__item {
  min-width: 0;
  padding: .85rem .9rem 1rem;
  background: var(--zo-green);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  box-shadow: var(--zo-shadow-soft);
}
.page-about .ab-stats__label {
  margin: 0;
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--zo-coldgray);
}
.page-about .ab-stats__num {
  margin: .35rem 0 0;
  font-family: var(--zo-font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.55rem, 4.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--zo-lime);
}
.page-about .ab-stats__unit {
  margin-left: .2rem;
  font-family: var(--zo-font-body);
  font-size: .8rem;
  font-weight: 500;
  color: var(--zo-coldgray);
}

.page-about .ab-hero__figure {
  margin: 0;
  position: relative;
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  overflow: hidden;
  box-shadow: var(--zo-shadow);
  background: var(--zo-green);
}
.page-about .ab-hero__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}

/* 章节通用 */
.page-about .ab-sec {
  padding-top: clamp(2.25rem, 6vw, 4rem);
}
.page-about .ab-sec-head {
  max-width: 68ch;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}
.page-about .ab-sec-head__title {
  margin: .55rem 0 0;
  font-family: var(--zo-font-head);
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--zo-cream);
  text-wrap: balance;
}
.page-about .ab-sec-head__lede {
  margin: .8rem 0 0;
  font-size: clamp(.95rem, 1vw, 1.05rem);
  line-height: 1.85;
  color: var(--zo-coldgray);
}

/* 时间线 */
.page-about .ab-line__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}
.page-about .ab-rail {
  min-width: 0;
}
.page-about .ab-years {
  display: flex;
  gap: .5rem;
  margin: 0;
  padding: 0 0 .35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .ab-years__item {
  flex: 0 0 auto;
}
.page-about .ab-years__link {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding: .5rem .85rem;
  text-decoration: none;
  background: var(--zo-green);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius-pill);
  transition: border-color .16s var(--zo-ease), background-color .16s var(--zo-ease);
}
.page-about .ab-years__year {
  font-family: var(--zo-font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--zo-lime);
  letter-spacing: .04em;
}
.page-about .ab-years__label {
  font-size: .74rem;
  color: var(--zo-coldgray);
  white-space: nowrap;
}
.page-about .ab-years__link:hover,
.page-about .ab-years__link:focus-visible {
  border-color: var(--zo-lime);
  background: var(--zo-moss);
  outline: none;
}
.page-about .ab-years__link:focus-visible {
  box-shadow: 0 0 0 3px var(--zo-black), 0 0 0 5px var(--zo-lime);
}

.page-about .ab-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  min-width: 0;
}
.page-about .ab-card {
  scroll-margin-top: 6.5rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  background: var(--zo-green);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  box-shadow: var(--zo-shadow);
  min-width: 0;
}
.page-about .ab-card__head {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
}
.page-about .ab-card__year {
  font-family: var(--zo-font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--zo-cream);
  letter-spacing: .06em;
}
.page-about .ab-card__title {
  margin: .8rem 0 0;
  font-family: var(--zo-font-head);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.35;
  font-weight: 800;
  color: var(--zo-cream);
}
.page-about .ab-card__text {
  margin: .6rem 0 0;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--zo-coldgray);
}
.page-about .ab-card__more {
  margin-top: .9rem;
  border-top: 2px dashed var(--zo-line);
  padding-top: .7rem;
}
.page-about .ab-card__more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--zo-orange);
}
.page-about .ab-card__more summary::-webkit-details-marker {
  display: none;
}
.page-about .ab-card__more summary::after {
  content: "+";
  font-family: var(--zo-font-num);
  font-size: 1rem;
  line-height: 1;
}
.page-about .ab-card__more[open] summary::after {
  content: "−";
}
.page-about .ab-card__more summary:focus-visible {
  outline: 2px solid var(--zo-lime);
  outline-offset: 3px;
}
.page-about .ab-card__more-body p {
  margin: .6rem 0 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--zo-coldgray);
}

/* 团队 */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
}
.page-about .ab-team__copy {
  min-width: 0;
}
.page-about .ab-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-role {
  padding: .9rem 1rem;
  background: var(--zo-green);
  border-left: 6px solid var(--zo-moss);
  border-top: 2px solid var(--zo-line);
  border-right: 2px solid var(--zo-line);
  border-bottom: 2px solid var(--zo-line);
  border-radius: 0 var(--zo-radius) var(--zo-radius) 0;
}
.page-about .ab-role:nth-child(2) {
  border-left-color: var(--zo-clay);
}
.page-about .ab-role:nth-child(3) {
  border-left-color: var(--zo-lime);
}
.page-about .ab-role:nth-child(4) {
  border-left-color: var(--zo-orange);
}
.page-about .ab-role__name {
  display: block;
  font-family: var(--zo-font-head);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--zo-cream);
}
.page-about .ab-role__text {
  margin: .35rem 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--zo-coldgray);
}
.page-about .ab-team__byline {
  margin: 1rem 0 0;
  padding: .85rem 1rem;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--zo-cream);
  background: var(--zo-moss);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
}
.page-about .ab-team__figure {
  margin: 0;
  position: relative;
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  overflow: hidden;
  box-shadow: var(--zo-shadow);
  background: var(--zo-green);
}
.page-about .ab-team__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 节奏 */
.page-about .ab-rhythm__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-rhythm__item {
  position: relative;
  padding: 1.1rem 1.1rem 1.15rem;
  background: var(--zo-black);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  box-shadow: var(--zo-shadow-soft);
  min-width: 0;
}
.page-about .ab-rhythm__time {
  display: inline-block;
  padding: .2rem .55rem;
  font-family: var(--zo-font-num);
  font-variant-numeric: tabular-nums;
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--zo-black);
  background: var(--zo-lime);
  border-radius: 6px;
}
.page-about .ab-rhythm__item:nth-child(2) .ab-rhythm__time {
  background: var(--zo-orange);
}
.page-about .ab-rhythm__item:nth-child(3) .ab-rhythm__time {
  background: var(--zo-cream);
}
.page-about .ab-rhythm__title {
  margin: .7rem 0 0;
  font-family: var(--zo-font-head);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--zo-cream);
}
.page-about .ab-rhythm__text {
  margin: .45rem 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--zo-coldgray);
}

/* 合作 */
.page-about .ab-partner__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
  padding: clamp(1.1rem, 3vw, 1.75rem);
  background: var(--zo-green);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  box-shadow: var(--zo-shadow);
}
.page-about .ab-partner__figure {
  margin: 0;
  position: relative;
  border: 2px solid var(--zo-line);
  border-radius: calc(var(--zo-radius) - 4px);
  overflow: hidden;
  background: var(--zo-black);
}
.page-about .ab-partner__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-partner__copy {
  min-width: 0;
}
.page-about .ab-partner__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .6rem;
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-partner__col {
  padding: .8rem .85rem;
  background: var(--zo-black);
  border: 2px solid var(--zo-line);
  border-radius: var(--zo-radius);
}
.page-about .ab-partner__col p {
  margin: .45rem 0 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--zo-coldgray);
}
.page-about .ab-partner__note {
  margin: 1rem 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--zo-cream);
}
.page-about .ab-link {
  color: var(--zo-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}
.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--zo-orange);
  outline: none;
}

/* 覆盖 */
.page-about .ab-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .75rem;
}
.page-about .ab-reach__stat {
  padding: 1rem 1.1rem 1.15rem;
  background: var(--zo-black);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  min-width: 0;
}
.page-about .ab-reach__stat:nth-child(1) {
  background: var(--zo-clay);
  border-color: rgba(11, 15, 13, .55);
}
.page-about .ab-reach__stat:nth-child(1) .ab-reach__label {
  color: #f7e7de;
}
.page-about .ab-reach__num {
  display: block;
  font-family: var(--zo-font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 5vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--zo-lime);
}
.page-about .ab-reach__stat:nth-child(1) .ab-reach__num {
  color: var(--zo-white);
}
.page-about .ab-reach__unit {
  margin-left: .1rem;
  font-size: .55em;
}
.page-about .ab-reach__dash {
  margin: 0 .12em;
  color: var(--zo-rock);
}
.page-about .ab-reach__label {
  margin: .55rem 0 0;
  font-size: .86rem;
  line-height: 1.7;
  color: var(--zo-coldgray);
}

/* 收尾 */
.page-about .ab-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  margin-top: clamp(2.25rem, 6vw, 4rem);
  padding: clamp(1.25rem, 3.5vw, 2rem);
  background: var(--zo-moss);
  border: 2px solid var(--zo-line-strong);
  border-radius: var(--zo-radius);
  box-shadow: var(--zo-shadow);
}
.page-about .ab-cta__title {
  margin: 0;
  font-family: var(--zo-font-head);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 800;
  color: var(--zo-cream);
}
.page-about .ab-cta__text {
  margin: .6rem 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--zo-cream);
}
.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: center;
}
.page-about .ab-cta__copybtn {
  font-family: var(--zo-font-body);
  cursor: pointer;
}
.page-about .ab-cta__copybtn[data-copied] {
  border-color: var(--zo-lime);
  color: var(--zo-lime);
}

@media (min-width: 700px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-rhythm__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-partner__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-reach__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: stretch;
  }
  .page-about .ab-hero__figure {
    display: flex;
    align-items: stretch;
  }
  .page-about .ab-hero__img {
    height: 100%;
    min-height: 420px;
    object-fit: cover;
  }

  .page-about .ab-line__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 1.75rem;
    align-items: start;
  }
  .page-about .ab-rail {
    position: sticky;
    top: 6.5rem;
  }
  .page-about .ab-years {
    flex-direction: column;
    gap: .5rem;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--zo-line-strong);
    padding-left: .9rem;
  }
  .page-about .ab-years__link {
    flex-direction: row;
    align-items: baseline;
    gap: .5rem;
    justify-content: flex-start;
    width: 100%;
    padding: .45rem .7rem;
    border-radius: 10px;
    background: transparent;
    border-color: transparent;
  }
  .page-about .ab-years__link:hover,
  .page-about .ab-years__link:focus-visible {
    background: var(--zo-green);
    border-color: var(--zo-line-strong);
  }
  .page-about .ab-years__label {
    font-size: .8rem;
    white-space: normal;
  }

  .page-about .ab-cards {
    gap: 1.15rem;
  }
  .page-about .ab-card:nth-child(even) {
    margin-left: clamp(0rem, 2.5vw, 2rem);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
  .page-about .ab-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-team__figure {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .ab-partner__grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: 2rem;
  }

  .page-about .ab-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 1.75rem;
  }
  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1200px) {
  .page-about .ab-hero__title {
    max-width: 16ch;
  }
  .page-about .ab-cards {
    gap: 1.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-years__link,
  .page-about .ab-card__more summary {
    transition: none;
  }
}

.page-about {
  --zo-small: 1rem;
}