.page-about {
  --ax: 17px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 16px var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mute);
}

.page-about .breadcrumb a {
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color var(--t-hover) var(--ease), border-color var(--t-hover) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--cream);
}

/* ---------- 首屏框景 ---------- */

.page-about .story-hero {
  border-bottom: 1px solid var(--line);
}

.page-about .story-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .story-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(31px, 7vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--cream);
  margin: 14px 0 0;
}

.page-about .story-hero__lede {
  margin: 18px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.75;
  color: #BFCBC5;
}

.page-about .story-hero__media {
  margin: 0;
  border: 2px solid var(--line-soft);
  box-shadow: 6px 6px 0 var(--ink-deep);
  background: var(--surface);
  overflow: hidden;
}

.page-about .story-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-about .story-hero__media figcaption {
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mute);
  border-top: 1px solid var(--line);
}

.page-about .story-facts {
  margin: 26px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.page-about .fact {
  padding: 12px 10px 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .fact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.page-about .fact__num {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--gold);
}

/* ---------- 通用小节头 ---------- */

.page-about .section-head {
  max-width: 60ch;
  margin-bottom: 30px;
}

.page-about .section-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--cream);
  margin: 10px 0 0;
}

.page-about .section-note {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

/* ---------- 起点 ---------- */

.page-about .origin-grid {
  display: grid;
  gap: 18px;
  border-left: 2px solid var(--brass);
  padding-left: 18px;
}

.page-about .origin-text {
  margin: 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.78;
  color: #B7C4BE;
}

/* ---------- 时间轴 ---------- */

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 28px;
  left: var(--ax);
  width: 2px;
  transform: translateX(-1px);
  background: linear-gradient(180deg, var(--gold) 0%, var(--brass) 38%, var(--line-soft) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 38px 52px;
}

.page-about .tl-item:last-child {
  padding-bottom: 20px;
}

.page-about .tl-node {
  position: absolute;
  left: var(--ax);
  top: 8px;
  width: 13px;
  height: 13px;
  transform: translateX(-50%);
  background: var(--ink);
  border: 2px solid var(--gold);
  transition: transform var(--t-hover) var(--ease), border-color var(--t-hover) var(--ease),
    box-shadow var(--t-hover) var(--ease);
}

.page-about .tl-item:hover .tl-node,
.page-about .tl-item:focus-within .tl-node {
  border-color: var(--gold-soft);
  transform: translateX(-50%) scale(1.4);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.18);
}

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

.page-about .tl-stage {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 26px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .tl-text {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.76;
  color: #AEBDB6;
}

.page-about .tl-more {
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
}

.page-about .tl-more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

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

.page-about .tl-more summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  height: 16px;
  line-height: 14px;
  text-align: center;
  border: 1px solid currentColor;
  font-size: 12px;
}

.page-about .tl-more[open] summary::before {
  content: "−";
}

.page-about .tl-more p {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: #93A59D;
}

/* ---------- 时间轴后的档案缺口 ---------- */

.page-about .archive-note {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 14px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .archive-note__media {
  margin: 0;
  border: 2px solid var(--line-soft);
  box-shadow: 6px 6px 0 var(--ink-deep);
  overflow: hidden;
}

.page-about .archive-note__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .archive-note__quote {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 3vw, 24px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--gold-soft);
}

.page-about .archive-note__sub {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mute);
}

/* ---------- 维护分工（浅色面板） ---------- */

.page-about .crew-panel {
  background: var(--cream);
  color: var(--ink-deep);
  border: 2px solid var(--gold);
  box-shadow: 8px 8px 0 var(--brick);
  padding: 26px 20px 30px;
}

.page-about .crew-panel .eyebrow {
  color: var(--brass);
}

.page-about .crew-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.4vw, 36px);
  line-height: 1.16;
  letter-spacing: -0.018em;
  color: var(--ink-deep);
}

.page-about .crew-lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: #2B4B43;
}

.page-about .crew-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 28px;
}

.page-about .crew-media {
  margin: 0;
  border: 2px solid var(--ink-deep);
  overflow: hidden;
}

.page-about .crew-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-about .crew-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .crew-item {
  padding: 15px 0;
  border-top: 1px solid rgba(11, 31, 26, 0.18);
}

.page-about .crew-item:last-child {
  border-bottom: 1px solid rgba(11, 31, 26, 0.18);
}

.page-about .crew-code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--brass);
}

.page-about .crew-item h3 {
  margin: 5px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
  color: var(--ink-deep);
}

.page-about .crew-duty {
  margin: 7px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: #33544C;
}

.page-about .crew-week {
  margin: 8px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--gold);
  font-size: 13.5px;
  line-height: 1.68;
  color: #5B7269;
}

/* ---------- 吉林覆盖 ---------- */

.page-about .region-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .region-grid h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .region-text {
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 15.5px;
  line-height: 1.78;
  color: #B3C1BA;
}

.page-about .region-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.page-about .region-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 6px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .region-list li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: translateY(-1px);
}

/* ---------- 被划掉的方案 ---------- */

.page-about .rejected-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .rejected-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .rejected-item {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-about .rejected-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .rejected-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  color: var(--cream);
  position: relative;
  padding-left: 22px;
}

.page-about .rejected-item h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--brick);
}

.page-about .rejected-item p {
  margin: 8px 0 0 22px;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.76;
  color: #A2B1AA;
}

.page-about .path-figure {
  margin: 0;
  padding: 18px;
  background: var(--ink-deep);
  border: 1px solid var(--line-soft);
}

.page-about .path-figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .path-figure figcaption {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mute);
}

.page-about .pc-box {
  fill: var(--ink);
  stroke: var(--mute);
  stroke-width: 1.5;
}

.page-about .pc-box--on {
  fill: var(--gold);
  stroke: var(--gold-soft);
}

.page-about .pc-line {
  fill: none;
  stroke: var(--brick);
  stroke-width: 2;
  stroke-dasharray: 6 5;
}

.page-about .pc-line--short {
  stroke: var(--mint);
  stroke-dasharray: none;
}

.page-about .pc-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  fill: var(--mute);
}

.page-about .pc-label--strong {
  fill: var(--cream);
}

/* ---------- 收束 ---------- */

.page-about .closing-box {
  padding: 26px 20px 28px;
  background: linear-gradient(160deg, var(--surface) 0%, var(--ink-deep) 100%);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--gold);
}

.page-about .closing-box h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.8vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .closing-text {
  margin: 14px 0 0;
  max-width: 52em;
  font-size: 15px;
  line-height: 1.78;
  color: #A9B8B1;
}

.page-about .closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .closing-links .btn {
  flex: 0 1 auto;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .story-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .crew-panel {
    padding: 34px 28px 38px;
  }

  .page-about .closing-box {
    padding: 34px 32px 38px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --ax: 33%;
  }

  .page-about .timeline::before {
    transform: translateX(-1px);
  }

  .page-about .tl-item {
    padding: 0 0 46px 0;
    display: grid;
    grid-template-columns: 33% minmax(0, 1fr);
    align-items: start;
  }

  .page-about .tl-item:last-child {
    padding-bottom: 24px;
  }

  .page-about .tl-node {
    left: 33%;
  }

  .page-about .tl-body {
    grid-column: 2;
    padding-left: 56px;
  }

  .page-about .tl-item--left .tl-body {
    grid-column: 1;
    padding-left: 0;
    padding-right: 56px;
    text-align: right;
  }

  .page-about .tl-item--left .tl-more summary {
    flex-direction: row-reverse;
  }

  .page-about .tl-item--left .tl-text,
  .page-about .tl-item--left .tl-more p {
    margin-left: auto;
  }

  .page-about .origin-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px;
    padding-left: 26px;
  }

  .page-about .archive-note {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 44px;
    align-items: center;
    padding-top: 34px;
  }

  .page-about .crew-body {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 38px;
    align-items: start;
  }

  .page-about .crew-panel {
    padding: 46px 48px 50px;
  }

  .page-about .crew-media {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .region-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .rejected-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .story-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 54px;
    align-items: start;
  }

  .page-about .story-hero__media {
    margin-top: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node,
  .page-about .breadcrumb a {
    transition: none;
  }

  .page-about .tl-item:hover .tl-node,
  .page-about .tl-item:focus-within .tl-node {
    transform: translateX(-50%);
    box-shadow: none;
    border-color: var(--gold-soft);
  }
}
<<<END>>>