.page-about {
  --about-rail: 150px;
  padding-bottom: clamp(48px, 8vw, 88px);
}

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

/* ---------- 开场 ---------- */
.page-about .about-hero {
  padding: clamp(26px, 5vw, 56px) 0 clamp(26px, 4.5vw, 44px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 6.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 20ch;
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.page-about .about-hero .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
}

.page-about .hero-meta {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 分屏骨架 ---------- */
.page-about .archive-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 44px);
  padding-top: clamp(26px, 5vw, 48px);
}

@media (min-width: 900px) {
  .page-about .archive-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 左侧阶段刻度 ---------- */
.page-about .tick-rail-title {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--muted-deep);
}

.page-about .tick-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .tick-list > li {
  flex: 0 0 auto;
}

.page-about .tick {
  position: relative;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  min-width: 146px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  text-decoration: none;
  scroll-snap-align: start;
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-about .tick-num {
  font-size: 12.5px;
  color: var(--muted-deep);
  padding-top: 3px;
  transition: color 0.16s var(--ease);
}

.page-about .tick-label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.page-about .tick-tip {
  display: none;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
  margin-top: 4px;
}

.page-about .tick:hover {
  border-color: var(--cyan);
  background: var(--teal-mist);
  transform: translateY(-2px);
}

.page-about .tick:hover .tick-num,
.page-about .tick:focus-visible .tick-num {
  color: var(--cyan);
}

@media (min-width: 900px) {
  .page-about .tick-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .tick-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .tick {
    min-width: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 10px 12px 10px 16px;
  }

  .page-about .tick::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 2px;
    height: 0;
    background: var(--cyan);
    transform: translateY(-50%);
    transition: height 0.18s var(--ease);
  }

  .page-about .tick:hover,
  .page-about .tick:focus-visible {
    background: var(--teal-mist);
    transform: none;
  }

  .page-about .tick:hover::before,
  .page-about .tick:focus-visible::before {
    height: 100%;
  }

  .page-about .tick-tip {
    display: block;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition: max-height 0.2s var(--ease), opacity 0.2s var(--ease), margin-top 0.2s var(--ease);
  }

  .page-about .tick:hover .tick-tip,
  .page-about .tick:focus-visible .tick-tip {
    max-height: 90px;
    opacity: 1;
    margin-top: 4px;
  }
}

/* ---------- 展区通用 ---------- */
.page-about .exhibit {
  padding-bottom: clamp(30px, 5vw, 56px);
  margin-bottom: clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .exhibit:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .exhibit-no {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 11px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  background: rgba(53, 240, 194, 0.07);
  border: 1px solid var(--teal-mist);
  border-radius: var(--radius-pill);
}

.page-about .exhibit h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 37px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--text);
  max-width: 22ch;
}

.page-about .exhibit-sub {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .exhibit-link {
  margin: 20px 0 0;
  font-size: 14.5px;
}

.page-about .exhibit-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--teal-mist);
  padding-bottom: 2px;
  transition: border-color 0.16s var(--ease);
}

.page-about .exhibit-link a:hover {
  border-color: var(--cyan);
}

/* ---------- 展区 01：大图 + 说明牌 ---------- */
.page-about .exhibit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 22px;
}

@media (min-width: 900px) {
  .page-about .exhibit-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-about .exhibit-figure {
    grid-column: span 5;
  }

  .page-about .exhibit-grid .plaque {
    grid-column: span 3;
  }
}

.page-about .plaque {
  background: var(--violet-mist);
  border-left: 2px solid var(--violet);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 18px 18px 20px;
}

.page-about .plaque-title {
  margin: 0;
  padding-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--violet);
  border-bottom: 1px dashed rgba(155, 92, 255, 0.45);
}

.page-about .plaque-body p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 展区 02：历程 ---------- */
.page-about .timeline-banner {
  margin: 22px 0 0;
}

.page-about .timeline {
  position: relative;
  margin-top: 26px;
  padding-left: 22px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 26px;
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--abyss);
  border: 1px solid var(--line-strong);
}

.page-about .tl-item:nth-child(1)::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(53, 240, 194, 0.65);
}

.page-about .tl-stage {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted-deep);
}

.page-about .tl-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.page-about .tl-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 64ch;
}

.page-about .tl-gain {
  margin-top: 9px !important;
  color: var(--cyan) !important;
  font-size: 13.5px !important;
}

.page-about .tl-gain::before {
  content: "→ ";
  color: var(--muted-deep);
}

/* ---------- 展区 03：团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 22px;
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 30px;
    align-items: start;
  }
}

.page-about .team-figure {
  margin: 0;
}

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

.page-about .team-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .team-item h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.page-about .team-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .team-meta {
  margin-top: 8px !important;
  font-size: 12px !important;
  letter-spacing: 0.06em;
  color: var(--muted-deep) !important;
}

/* ---------- 展区 04：流程 ---------- */
.page-about .flow-ruler {
  display: block;
  width: 100%;
  height: 12px;
  margin: 26px 0 0;
  color: var(--line-strong);
}

.page-about .flow {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .flow-step {
  position: relative;
  padding: 14px 14px 14px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-about .flow-step:hover,
.page-about .flow-step:focus-visible,
.page-about .flow-step:focus {
  border-color: var(--cyan);
  background: #0E1B2C;
  outline: none;
}

.page-about .flow-node {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted-deep);
  margin-bottom: 6px;
}

.page-about .flow-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.page-about .flow-visible {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .flow-note {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--cyan);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-about .flow-step:hover .flow-note,
.page-about .flow-step:focus-visible .flow-note,
.page-about .flow-step:focus .flow-note {
  max-height: 160px;
  opacity: 1;
}

@media (max-width: 899px) {
  .page-about .flow-note {
    max-height: none;
    opacity: 1;
    color: var(--muted);
  }
}

@media (min-width: 900px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    margin-top: 0;
  }

  .page-about .flow-step {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 22px 0 0;
  }

  .page-about .flow-step:hover,
  .page-about .flow-step:focus-visible,
  .page-about .flow-step:focus {
    background: transparent;
    border-color: transparent;
  }

  .page-about .flow-step::before {
    content: "";
    position: absolute;
    top: 9px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--line-strong);
  }

  .page-about .flow-step::after {
    content: "";
    position: absolute;
    top: 4px;
    left: 0;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--abyss);
    border: 1px solid var(--cyan);
    transition: box-shadow 0.16s var(--ease);
  }

  .page-about .flow-step:hover::after,
  .page-about .flow-step:focus-visible::after,
  .page-about .flow-step:focus::after {
    box-shadow: 0 0 0 4px rgba(53, 240, 194, 0.18);
  }
}

.page-about .flow-foot {
  margin-top: 24px;
  padding: 16px 18px;
  background: var(--teal-mist);
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .flow-foot p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .flow-foot strong {
  color: var(--text);
  font-weight: 700;
}

.page-about .flow-foot .exhibit-link {
  margin-top: 12px;
}

/* ---------- 展区 05：本地化与技术 ---------- */
.page-about .now-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (min-width: 720px) {
  .page-about .now-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-about .now-card {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .now-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--line-strong);
}

.page-about .now-card--cyan::before {
  background: var(--cyan);
}

.page-about .now-card--violet::before {
  background: var(--violet);
}

.page-about .now-card--amber::before {
  background: var(--amber);
}

.page-about .now-tag {
  margin: 0 0 8px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--muted-deep);
}

.page-about .now-card--cyan .now-tag { color: var(--cyan); }
.page-about .now-card--violet .now-tag { color: var(--violet); }
.page-about .now-card--amber .now-tag { color: var(--amber); }

.page-about .now-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-about .now-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 继续查看 ---------- */
.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: clamp(26px, 4vw, 40px);
  margin-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--line);
}

/* ---------- 图片通用 ---------- */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
<<<END>>>