.page-about {
  --about-rule: 1.5px solid var(--forest);
  --about-line: #c6d9b4;
  --about-index-w: 168px;
}

/* 面包屑 */
.page-about .crumbs {
  padding-top: clamp(0.9rem, 2.5vw, 1.4rem);
  font-size: 0.78rem;
}
.page-about .crumbs__sep {
  opacity: 0.55;
}

/* 首屏封面 */
.page-about .about-cover {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-top: clamp(0.75rem, 2.5vw, 1.5rem);
  padding-bottom: clamp(2rem, 4.5vw, 3.25rem);
  border-bottom: var(--about-rule);
}
.page-about .cover-kicker {
  color: var(--album);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.page-about .cover-kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--kiwi);
  border: 1px solid var(--forest);
}
.page-about .about-cover h1 {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--forest);
  text-wrap: balance;
}
.page-about .cover-lede {
  margin: 1rem 0 0;
  max-width: 56ch;
  font-size: clamp(0.98rem, 1.7vw, 1.1rem);
  line-height: 1.8;
  color: var(--ink);
}
.page-about .cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.page-about .cover-stack {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0.5rem 0.6rem 1.25rem;
}
.page-about .cover-card {
  border: var(--about-rule);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-step);
  padding: 0.6rem 0.8rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "idx meta";
  column-gap: 0.7rem;
  align-items: center;
  line-height: 1.4;
}
.page-about .cover-card .mono {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-variant-numeric: tabular-nums;
  color: var(--forest);
}
.page-about .cover-card strong {
  grid-area: name;
  font-size: 0.95rem;
  color: var(--forest);
}
.page-about .cover-card em {
  grid-area: meta;
  font-style: normal;
  font-size: 0.74rem;
  color: var(--sage);
}
.page-about .cover-card--a {
  width: 86%;
  transform: rotate(-2deg);
  background: var(--turf);
}
.page-about .cover-card--b {
  width: 76%;
  margin-left: 10%;
  margin-top: -0.5rem;
  transform: rotate(1.6deg);
  background: var(--yolk);
}
.page-about .cover-card--c {
  width: 84%;
  margin-left: 4%;
  margin-top: -0.5rem;
  transform: rotate(-1deg);
  background: var(--forest);
}
.page-about .cover-card--c .mono,
.page-about .cover-card--c strong {
  color: var(--paper);
}
.page-about .cover-card--c em {
  color: rgba(247, 244, 234, 0.72);
}

/* 主栅格 */
.page-about .about-shell {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 3rem);
  padding-top: clamp(1.75rem, 4vw, 3rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}
.page-about .about-margin {
  min-width: 0;
}

/* 年份索引 */
.page-about .year-card {
  border: var(--about-rule);
  background: var(--forest);
  color: var(--paper);
  padding: 0.85rem 0.9rem 1rem;
  box-shadow: var(--shadow-step);
}
.page-about .year-card .label {
  display: block;
  font-size: 0.7rem;
  color: var(--yolk);
}
.page-about .year-list {
  list-style: none;
  margin: 0.7rem 0 0;
  padding: 0 0 0.3rem;
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  max-width: 100%;
  scrollbar-width: thin;
}
.page-about .year-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.55rem;
  border: 1px solid rgba(247, 244, 234, 0.35);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-variant-numeric: tabular-nums;
  text-decoration: none;
  color: var(--paper);
  white-space: nowrap;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}
.page-about .year-list a::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--kiwi);
}
.page-about .year-list a:hover,
.page-about .year-list a:focus-visible {
  background: var(--yolk);
  border-color: var(--yolk);
  color: var(--forest);
}
.page-about .year-note {
  margin: 0.65rem 0 0;
  font-size: 0.72rem;
  line-height: 1.6;
  color: rgba(247, 244, 234, 0.7);
}

/* 章节流 */
.page-about .about-flow {
  min-width: 0;
}
.page-about .snap {
  padding-block: clamp(1.5rem, 3.5vw, 2.25rem);
  border-top: var(--about-rule);
  scroll-margin-top: 5rem;
}
.page-about .about-flow > .snap:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .snap-head {
  margin-bottom: 1rem;
}
.page-about .snap-head .label {
  color: var(--kiwi-deep);
}
.page-about .snap-head h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.45rem, 3.4vw, 2.15rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 900;
  color: var(--forest);
  text-wrap: balance;
}
.page-about .snap p {
  margin: 0.85rem 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--ink);
}
.page-about .snap p a {
  color: var(--kiwi-deep);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}
.page-about .snap p a:hover {
  color: var(--brick);
}
.page-about .snap-split {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

/* 图片 */
.page-about .media {
  margin: 0;
}
.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--about-rule);
}
.page-about .media__cap {
  margin-top: 0.45rem;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--sage);
}

/* 归档工序 */
.page-about .dossier {
  margin-top: 1.5rem;
  border: var(--about-rule);
  background: var(--turf);
  box-shadow: var(--shadow-step);
}
.page-about .dossier summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--forest);
}
.page-about .dossier summary::-webkit-details-marker {
  display: none;
}
.page-about .dossier summary::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--forest);
  color: var(--paper);
  font-size: 0.8rem;
  line-height: 1;
}
.page-about .dossier[open] summary::before {
  content: "\2212";
}
.page-about .dossier ol {
  margin: 0;
  padding: 0.25rem 1rem 1rem 2.4rem;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--ink);
}
.page-about .dossier li + li {
  margin-top: 0.4rem;
}

/* 团队数字 */
.page-about .team-stats {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.page-about .team-stats li {
  border: var(--about-rule);
  background: var(--paper);
  box-shadow: var(--shadow-step);
  padding: 0.85rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.page-about .stat-n {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 4vw, 2.1rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--kiwi-deep);
}
.page-about .stat-k {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--sage);
}
.page-about .team-stats li:nth-child(even) {
  background: var(--turf);
}
.page-about .team-stats li:nth-child(4) {
  background: var(--forest);
}
.page-about .team-stats li:nth-child(4) .stat-n {
  color: var(--yolk);
}
.page-about .team-stats li:nth-child(4) .stat-k {
  color: rgba(247, 244, 234, 0.78);
}

/* 时间线 */
.page-about .mile {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}
.page-about .mile-item {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: 0.85rem;
  padding-bottom: 1.35rem;
  scroll-margin-top: 5.5rem;
}
.page-about .mile-year {
  align-self: start;
  text-align: center;
  padding: 0.15rem 0.25rem;
  border: var(--about-rule);
  background: var(--yolk);
  color: var(--forest);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .mile-item:target .mile-year {
  background: var(--kiwi);
  color: var(--paper);
}
.page-about .mile-body {
  border-left: 2px solid var(--about-line);
  padding-left: 1rem;
  padding-bottom: 0.2rem;
}
.page-about .mile-body h3 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--forest);
}
.page-about .mile-body p {
  margin: 0;
  max-width: 54ch;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--ink);
}
.page-about .timeline-photo {
  max-width: 520px;
  margin: 1.6rem 0 0 auto;
}

/* 同行与认可 */
.page-about .album-note {
  margin: 1.5rem 0 0;
  border: var(--about-rule);
  border-left: 6px solid var(--album);
  background: var(--turf);
  padding: 0.9rem 1rem;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--forest);
}

/* 收藏场景 */
.page-about .collect-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.5rem;
}
.page-about .collect-card {
  border: var(--about-rule);
  background: var(--paper);
  box-shadow: var(--shadow-step);
  padding: 1rem 1.05rem 1.15rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}
.page-about .collect-card:nth-child(1) {
  background: var(--turf);
}
.page-about .collect-card:nth-child(3) {
  background: var(--forest);
}
.page-about .collect-card:nth-child(3) h3 {
  color: var(--paper);
}
.page-about .collect-card:nth-child(3) p {
  color: rgba(247, 244, 234, 0.84);
}
.page-about .collect-card .tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}
.page-about .collect-card h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--forest);
}
.page-about .collect-card p {
  margin: 0;
  max-width: none;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--ink);
}

/* 结尾行动区 */
.page-about .about-cta {
  background: var(--forest);
  border-top: 6px solid var(--yolk);
  padding-block: clamp(2rem, 5vw, 3.25rem);
}
.page-about .about-cta-inner {
  display: grid;
  justify-items: start;
  gap: 0.85rem;
}
.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--paper);
  text-wrap: balance;
}
.page-about .about-cta p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.96rem;
  line-height: 1.75;
  color: rgba(247, 244, 234, 0.82);
}
.page-about .about-cta .cover-actions {
  margin-top: 0.4rem;
}

/* 中等宽度 */
@media (min-width: 760px) {
  .page-about .snap-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
  .page-about .team-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .collect-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .collect-card:nth-child(2) {
    transform: translateY(12px);
  }
  .page-about .collect-card:nth-child(3) {
    transform: translateY(24px);
  }
  .page-about .collect-grid {
    padding-bottom: 1.5rem;
  }
}

/* 桌面双栏：年份轨道 + 内容流 */
@media (min-width: 900px) {
  .page-about .about-cover {
    grid-template-columns: minmax(0, 1.32fr) minmax(240px, 0.68fr);
    align-items: center;
  }
}

@media (min-width: 920px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-margin {
    position: sticky;
    top: 5.5rem;
  }
  .page-about .year-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .year-list a {
    justify-content: flex-start;
  }
}