.page-about {
  --about-axis-x: 26px;
  --about-node-size: 11px;
}

/* ---------- 首屏 ---------- */
.page-about .about-head {
  padding-top: 40px;
  padding-bottom: 8px;
}

.page-about .about-intro {
  align-items: end;
  gap: 40px;
  margin-top: 28px;
}

.page-about .about-intro h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: clamp(30px, 5.4vw, 46px);
  line-height: 1.22;
  margin: 10px 0 18px;
}

.page-about .lede {
  font-size: 17px;
  line-height: 1.85;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease),
    border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .btn--solid {
  background: var(--amber);
  color: var(--ink-deep);
}

.page-about .btn--solid:hover {
  background: var(--amber-light);
  transform: translateY(-2px);
}

.page-about .btn--ghost {
  border-color: var(--amber);
  color: var(--amber);
}

.page-about .btn--ghost:hover {
  background: rgba(200, 145, 47, 0.14);
  transform: translateY(-2px);
}

.page-about .btn--quiet {
  border-color: var(--line);
  color: var(--moss);
}

.page-about .btn--quiet:hover {
  border-color: var(--amber);
  color: var(--amber);
}

/* ---------- 站点速览玻璃板 ---------- */
.page-about .about-stamp {
  padding: 24px;
  border: 1px solid var(--gold-line);
  background: linear-gradient(160deg, rgba(6, 30, 23, 0.92), rgba(11, 58, 44, 0.86));
  backdrop-filter: blur(6px);
}

.page-about .about-stamp .eyebrow {
  color: var(--amber);
}

.page-about .stamp-list {
  margin: 16px 0 0;
  display: grid;
  gap: 0;
}

.page-about .stamp-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(79, 107, 82, 0.3);
}

.page-about .stamp-list > div:last-child {
  border-bottom: 0;
}

.page-about .stamp-list dt {
  font-size: 14px;
  color: var(--moss);
}

.page-about .stamp-list dd {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--cream);
  text-align: right;
}

.page-about .stamp-list .mono {
  color: var(--amber-light);
  font-size: 20px;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-top: 64px;
}

.page-about .about-origin .grid {
  align-items: center;
  gap: 44px;
}

.page-about .about-img {
  margin: 0;
  position: relative;
}

.page-about .img-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .about-img--origin img {
  aspect-ratio: 14 / 9;
  box-shadow: var(--shadow);
  border: 1px solid var(--grid-line);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-sec {
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
}

.page-about .timeline {
  list-style: none;
  margin: 52px 0 0;
  padding: 0 0 0 0;
  position: relative;
}

/* 纵轴 */
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: var(--about-axis-x);
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    rgba(200, 145, 47, 0.55),
    rgba(200, 145, 47, 0.12)
  );
}

.page-about .timeline__node {
  position: relative;
  padding: 0 0 48px calc(var(--about-axis-x) + 34px);
  display: grid;
  gap: 12px;
}

.page-about .timeline__node:last-child {
  padding-bottom: 0;
}

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  left: calc(var(--about-axis-x) - (var(--about-node-size) / 2) + 1px);
  top: 12px;
  width: var(--about-node-size);
  height: var(--about-node-size);
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(11, 58, 44, 0.9), 0 0 0 5px rgba(200, 145, 47, 0.45);
}

.page-about .timeline__year {
  display: inline-block;
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--amber-light);
  font-family: var(--font-mono);
  font-weight: 500;
}

.page-about .timeline__body {
  border-left: 3px solid rgba(200, 145, 47, 0.6);
  padding: 6px 0 6px 20px;
  background: linear-gradient(90deg, rgba(200, 145, 47, 0.07), transparent 62%);
}

.page-about .timeline__body .card__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.4;
  color: var(--cream);
  margin: 0 0 12px;
}

.page-about .timeline__body .prose {
  color: rgba(242, 237, 227, 0.82);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.page-about .tag--clay {
  background: rgba(169, 96, 63, 0.2);
  color: #e6b79c;
  border: 1px solid rgba(169, 96, 63, 0.55);
}

.page-about .tag--amber {
  background: rgba(200, 145, 47, 0.18);
  color: var(--amber-light);
  border: 1px solid rgba(200, 145, 47, 0.5);
}

.page-about .tag--red {
  background: rgba(122, 36, 49, 0.35);
  color: #f0bfc6;
  border: 1px solid rgba(122, 36, 49, 0.85);
}

.page-about .about-img--timeline {
  margin-top: 56px;
}

.page-about .about-img--timeline img {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--grid-line);
}

.page-about .about-cap {
  margin-top: 12px;
  font-size: 13px;
  color: var(--moss);
  letter-spacing: 0.02em;
}

.page-about .about-timeline-sec .about-cap {
  color: rgba(242, 237, 227, 0.6);
}

/* ---------- 团队横向卡片 ---------- */
.page-about .about-team {
  padding-top: 48px;
}

.page-about .team-scroller {
  display: flex;
  gap: 20px;
  margin-top: 40px;
  overflow-x: auto;
  padding-bottom: 14px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .team-card {
  flex: 0 0 82%;
  scroll-snap-align: start;
  background: var(--chip);
  border: 1px solid var(--grid-line);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  border-color: var(--amber);
  box-shadow: var(--shadow);
}

.page-about .team-card__idx {
  display: block;
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.page-about .team-card .card__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 21px;
  color: var(--ink-green);
  margin: 0 0 8px;
}

.page-about .team-card .card__meta {
  font-size: 13px;
  color: var(--clay);
  margin: 0 0 14px;
  letter-spacing: 0.01em;
}

.page-about .team-card .prose {
  font-size: 15px;
  line-height: 1.78;
  color: var(--stone);
  margin: 0;
}

.page-about .about-img--team {
  margin-top: 46px;
}

.page-about .about-img--team img {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--grid-line);
}

/* ---------- 三条内容系列 ---------- */
.page-about .about-series {
  border-top: 1px solid var(--grid-line);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.page-about .filter-btn {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--cream);
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease);
}

.page-about .filter-btn:hover {
  border-color: var(--amber);
  color: var(--amber-light);
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink-deep);
}

.page-about .series-grid {
  display: grid;
  gap: 22px;
  margin-top: 34px;
}

.page-about .series-card {
  padding: 26px 24px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--grid-line);
  background: rgba(255, 255, 255, 0.045);
  border-top: 3px solid var(--moss);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .series-card:hover {
  transform: translateY(-2px);
}

.page-about .series-card--amber {
  border-top-color: var(--amber);
}

.page-about .series-card--clay {
  border-top-color: var(--clay);
}

.page-about .series-card--red {
  border-top-color: var(--felt);
}

.page-about .series-card .card__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.4;
  color: var(--cream);
  margin: 18px 0 12px;
}

.page-about .series-card .prose {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 237, 227, 0.82);
  margin: 0;
}

.page-about .series-card .card__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(79, 107, 82, 0.5);
  font-size: 13px;
  color: var(--moss);
}

.page-about .series-card[hidden] {
  display: none;
}

/* ---------- 合作 ---------- */
.page-about .about-partners .grid {
  gap: 40px;
  align-items: start;
}

.page-about .about-stats {
  padding: 26px 24px;
  border: 1px solid var(--gold-line);
}

.page-about .about-stats .eyebrow {
  color: var(--amber);
}

.page-about .stat-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .stat-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .metric__value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 34px;
  line-height: 1.05;
  color: var(--amber-light);
  letter-spacing: 0.01em;
}

.page-about .metric__value small {
  font-size: 0.6em;
  margin-left: 2px;
}

.page-about .metric__label {
  font-size: 13px;
  color: var(--moss);
  letter-spacing: 0.02em;
}

/* ---------- 主体信息 ---------- */
.page-about .about-subject {
  border-top: 1px solid var(--grid-line);
  padding-bottom: 72px;
}

.page-about .subject-grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .subject-item {
  padding: 20px 22px;
  border: 1px solid var(--grid-line);
  background: var(--chip);
}

.page-about .subject-item .eyebrow {
  color: var(--clay);
  margin: 0 0 8px;
}

.page-about .subject-value {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-green);
  word-break: break-word;
}

.page-about .subject-value.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* 折叠 */
.page-about .subject-collapse {
  margin-top: 26px;
  border: 1px solid var(--grid-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--cream);
}

.page-about .collapse__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  background: rgba(6, 30, 23, 0.9);
  color: var(--cream);
  border: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s var(--ease);
}

.page-about .collapse__head:hover {
  background: var(--ink-green);
}

.page-about .collapse__icon {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--amber);
  transition: transform 0.2s var(--ease);
}

.page-about .collapse[data-open] .collapse__icon {
  transform: rotate(45deg);
}

.page-about .collapse__body-inner {
  padding: 20px 22px 22px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--stone);
}

.page-about .collapse__body-inner p {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-about .about-intro,
  .page-about .about-origin .grid,
  .page-about .about-partners .grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-intro {
    align-items: stretch;
  }

  .page-about .about-stamp {
    margin-top: 4px;
  }

  .page-about .timeline__node {
    padding-left: calc(var(--about-axis-x) + 26px);
  }
}

@media (min-width: 900px) {
  .page-about .about-head {
    padding-top: 56px;
  }

  .page-about .about-intro {
    gap: 56px;
  }

  .page-about .about-actions {
    margin-top: 32px;
  }

  .page-about .timeline {
    padding-left: 42px;
    --about-axis-x: 0px;
  }

  .page-about .timeline::before {
    left: 5px;
    top: 10px;
  }

  .page-about .timeline__node {
    grid-template-columns: 148px minmax(0, 1fr);
    align-items: start;
    gap: 30px;
    padding-left: 36px;
    padding-bottom: 64px;
  }

  .page-about .timeline__node::before {
    left: 0;
    top: 14px;
  }

  .page-about .timeline__node:nth-child(even) .timeline__body {
    transform: translateX(14px);
  }

  .page-about .timeline__year {
    text-align: right;
    font-size: 24px;
    padding-top: 2px;
  }

  .page-about .team-scroller {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
    gap: 22px;
  }

  .page-about .team-card {
    flex: initial;
  }

  .page-about .series-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-about .about-img--origin img {
    aspect-ratio: 4 / 3;
  }
}

@media (min-width: 1180px) {
  .page-about .about-subject {
    padding-bottom: 96px;
  }

  .page-about .series-grid {
    gap: 28px;
  }
}
<<<END>>>