.page-about {
  --about-rail-w: 208px;
  --about-num-size: clamp(38px, 7vw, 60px);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-bottom: 32px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--line-cyan) 38%, transparent 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
  align-items: end;
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-kicker::before {
  content: "";
  width: 44px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(2.3rem, 6.6vw, 4.6rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__accent {
  color: var(--orange);
}

.page-about .about-hero__text {
  margin: 22px 0 0;
  max-width: 46ch;
  color: var(--text-dim);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px;
  background: var(--ink);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .about-fact__label {
  font-size: var(--t-12);
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 双轨骨架 ---------- */
.page-about .about-frame {
  display: grid;
  gap: 36px;
  padding-top: 40px;
}

.page-about .about-rail {
  min-width: 0;
}

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

.page-about .about-rail__list {
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__link {
  display: inline-flex;
  gap: 8px;
  align-items: baseline;
  padding: 6px 0;
  white-space: nowrap;
  font-size: var(--t-14);
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-rail__link span {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--cyan-dim);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-block {
  padding: 0 0 56px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-block:last-of-type {
  padding-bottom: 16px;
}

.page-about .about-p {
  max-width: 66ch;
  margin: 18px 0 0;
  font-size: var(--t-17);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-p--tight {
  margin-top: 0;
}

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

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed var(--line-cyan);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-bottom-style: solid;
}

/* ---------- 奶油纸注释卡 ---------- */
.page-about .about-note {
  margin-top: 28px;
  max-width: 56ch;
}

.page-about .about-note__text {
  margin: 10px 0 0;
  font-size: var(--t-17);
  line-height: 1.8;
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl-media {
  margin: 26px 0 34px;
}

.page-about .timeline {
  position: relative;
  padding-left: 30px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background-image: linear-gradient(to bottom, var(--cyan-dim) 0 6px, transparent 6px 14px);
  background-size: 2px 14px;
}

.page-about .tl-node {
  position: relative;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan-dim);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .tl-node[open]::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .tl-node > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-stage {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .tl-title {
  margin: 0;
  font-size: var(--t-22);
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-about .tl-node > summary:hover .tl-title,
.page-about .tl-node > summary:focus-visible .tl-title {
  color: var(--cyan);
}

.page-about .tl-body {
  padding: 12px 0 4px;
  max-width: 62ch;
  font-size: var(--t-17);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .tl-body p {
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-card {
  padding: 26px 22px;
  background: var(--ink-2);
  transition: background 0.2s ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  background: rgba(61, 245, 208, 0.06);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--about-num-size);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .team-card__name {
  margin: 14px 0 0;
  font-size: var(--t-22);
  font-weight: 700;
  color: var(--white);
}

.page-about .team-card__desc {
  margin: 10px 0 0;
  font-size: var(--t-14);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .team-card__duty {
  margin: 14px 0 0;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  line-height: 1.7;
  color: var(--mist);
  border-left: 2px solid var(--line);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .team-card:hover .team-card__duty {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-about .about-team-media {
  margin: 34px 0 0;
}

/* ---------- 校订流程 ---------- */
.page-about .steps {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 6px 18px;
  padding: 22px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .step:first-child {
  border-top: 1px dashed var(--line);
}

.page-about .step__num {
  font-family: var(--font-mono);
  font-size: var(--t-22);
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan-dim);
}

.page-about .step__title {
  margin: 0;
  font-size: var(--t-22);
  font-weight: 700;
  color: var(--white);
}

.page-about .step__desc {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: var(--t-17);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .step__meta {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-note--wide {
  max-width: 64ch;
}

/* ---------- 覆盖 ---------- */
.page-about .cover-grid {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.page-about .cover-card {
  padding-top: 16px;
  border-top: 2px solid var(--cyan-dim);
}

.page-about .cover-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--about-num-size);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--white);
}

.page-about .cover-card__name {
  margin: 12px 0 0;
  font-size: var(--t-17);
  font-weight: 700;
  color: var(--cyan);
}

.page-about .cover-card__desc {
  margin: 8px 0 0;
  font-size: var(--t-14);
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 本地运营 ---------- */
.page-about .about-local {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-about .about-local__text .about-p:first-child {
  margin-top: 0;
}

.page-about .about-local__media {
  margin: 0;
}

.page-about .media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    gap: 48px;
  }

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

  .page-about .cover-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px 34px;
  }

  .page-about .about-local {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-tl-media {
    margin: 28px 0 40px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-frame {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 64px;
    padding-top: 52px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    padding: 8px 0 8px 14px;
    border-bottom: none;
    border-left: 2px solid var(--line);
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--cyan);
    border-bottom-color: transparent;
  }

  .page-about .about-block {
    padding-bottom: 72px;
  }

  .page-about .step {
    grid-template-columns: 68px minmax(0, 1fr);
  }

  .page-about .timeline {
    padding-left: 36px;
  }

  .page-about .tl-node::before {
    left: -36px;
  }
}
<<<END>>>