.page-about {
  --about-rail-w: 108px;
  background: var(--paper-2);
  color: var(--ink);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-crumb {
  padding-block: 0.9rem 0.25rem;
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  margin-top: 0.75rem;
  border-top: 3px solid var(--coral);
  border-bottom: 3px solid var(--ink);
  background: var(--deep);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(200, 208, 216, 0.14) 0 1px,
    transparent 1px 72px
  );
  pointer-events: none;
}

.page-about .about-cover-grid {
  position: relative;
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(1.75rem, 5vw, 4rem);
  align-items: center;
}

.page-about .about-cover-stamp {
  display: inline-block;
  margin: 0;
  padding: 0.32rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--deep);
  background: var(--coral);
  border: 2px solid var(--ink);
  transform: rotate(-2deg);
}

.page-about .about-title {
  margin: 0.85rem 0 0;
  font-size: clamp(1.85rem, 6vw, 3.6rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-lead {
  margin: 1rem 0 0;
  max-width: 36em;
  font-size: clamp(0.95rem, 2.4vw, 1.06rem);
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-cover-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.6rem;
  margin: 1.4rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--line-light);
  font-size: 0.9rem;
  color: var(--silver);
}

.page-about .about-cover-facts .mono {
  color: var(--coral);
  font-weight: 700;
  margin-right: 0.32rem;
}

.page-about .about-cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.page-about .about-cover-actions .btn-ghost,
.page-about .about-cta .btn-ghost {
  color: var(--paper);
  border-color: var(--silver);
  background: transparent;
}

.page-about .about-cover-media {
  margin: 0;
  border: 2px solid var(--silver);
  box-shadow: 8px 8px 0 var(--coral);
  background: var(--deep-2);
}

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

/* ---------- 主体栅格：年份刻度 + 档案抽屉 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding-top: clamp(1.75rem, 5vw, 3.25rem);
  align-items: start;
}

.page-about .about-rail {
  border: 2px solid var(--ink);
  background: var(--paper);
  box-shadow: var(--shadow-hard-sm);
  padding: 0.8rem 0.9rem;
  min-width: 0;
}

.page-about .about-rail-title {
  margin: 0 0 0.55rem;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  color: var(--stone);
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
}

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

.page-about .about-rail-link {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  padding: 0.32rem 0.6rem;
  border-left: 3px solid transparent;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.page-about .about-rail-link .mono {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--deep);
}

.page-about .about-rail-label {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  border-left-color: var(--coral);
  background: rgba(255, 107, 74, 0.14);
}

.page-about .about-sheets {
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.85rem);
  min-width: 0;
}

/* ---------- 档案面板 ---------- */
.page-about .about-sheet {
  position: relative;
  min-width: 0;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.15rem, 3.2vw, 2.1rem);
}

.page-about .about-sheet-stamp {
  display: none;
}

.page-about .about-sheet-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem 0.8rem;
  padding-bottom: 0.7rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--ink);
}

.page-about .about-sheet-index {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--coral-deep);
  letter-spacing: 0.08em;
}

.page-about .about-sheet-title {
  margin: 0;
  font-size: clamp(1.2rem, 3.4vw, 1.7rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.page-about .about-sheet-lead {
  margin: 0 0 1rem;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .about-sheet-lead--after {
  margin: 1.1rem 0 0;
  padding: 0.8rem 1rem;
  background: var(--mist);
  border-left: 4px solid var(--jade);
  color: var(--ink);
}

/* ---------- 时间线 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl-item {
  position: relative;
  margin-left: 0.45rem;
  padding: 0 0 clamp(1rem, 3vw, 1.5rem) 1.2rem;
  border-left: 2px solid var(--silver);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  background: var(--paper);
  border: 2px solid var(--ink);
}

.page-about .about-tl-item:last-child::before {
  background: var(--coral);
}

.page-about .about-tl-year {
  display: block;
  margin-bottom: 0.4rem;
  font-size: clamp(1.35rem, 4vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--coral-deep);
}

.page-about .about-tl-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  line-height: 1.4;
}

.page-about .about-tl-body p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 分类体系 ---------- */
.page-about .about-counts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.page-about .about-count {
  border: 2px solid var(--ink);
  background: var(--mist);
  box-shadow: var(--shadow-hard-sm);
  padding: 0.8rem 0.95rem;
}

.page-about .about-count-num {
  display: block;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--deep);
}

.page-about .about-count-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.82rem;
  color: var(--stone);
}

.page-about .about-families {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-families li {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.75rem 0.9rem;
  background: var(--paper-2);
  border: 1px solid var(--line-mid);
}

.page-about .about-family-tag {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--clay);
}

.page-about .about-families h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.page-about .about-families p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.68;
  color: var(--stone);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 1.2rem 0 0;
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard-sm);
  background: var(--deep-2);
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-figure--team img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure .media-caption {
  display: block;
  padding: 0.6rem 0.85rem;
  background: var(--paper);
  border-top: 2px solid var(--ink);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 权益查询步骤 ---------- */
.page-about .about-step {
  margin-top: 0.55rem;
  border: 2px solid var(--line-mid);
  background: var(--paper-2);
}

.page-about .about-step[open] {
  border-color: var(--ink);
  box-shadow: var(--shadow-hard-sm);
  background: var(--paper);
}

.page-about .about-step > summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.78rem 1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 0.98rem;
}

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

.page-about .about-step > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--coral-deep);
}

.page-about .about-step[open] > summary::after {
  content: "－";
  color: var(--steel);
}

.page-about .about-step-num {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--coral-deep);
}

.page-about .about-step-title {
  min-width: 0;
}

.page-about .about-step-body {
  padding: 0 1rem 0.9rem 2.55rem;
}

.page-about .about-step-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1.2rem;
}

.page-about .about-team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-team-list li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 0.7rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-team-num {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--clay);
}

.page-about .about-team-list h3 {
  margin: 0 0 0.2rem;
  font-size: 0.99rem;
}

.page-about .about-team-list p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.68;
  color: var(--stone);
}

/* ---------- 覆盖与节奏 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-mid);
  border: 2px solid var(--ink);
}

.page-about .about-stats li {
  background: var(--paper);
  padding: 0.85rem 0.95rem;
  min-width: 0;
}

.page-about .about-stat-num {
  display: block;
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--deep);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 原则 ---------- */
.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-principles li {
  padding: 0.85rem 1rem;
  background: var(--paper-2);
  border-left: 4px solid var(--steel);
}

.page-about .about-principles h3 {
  margin: 0 0 0.28rem;
  font-size: 1rem;
  color: var(--deep);
}

.page-about .about-principles p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 1.2rem;
  padding: clamp(1.3rem, 3.5vw, 2.2rem);
  background: var(--deep);
  color: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 var(--coral);
}

.page-about .about-cta h2 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--silver);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-cover-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

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

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.25rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    padding: 1rem 0.6rem;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .about-rail-link {
    padding: 0.5rem 0.45rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-sheet {
    padding-left: 4.75rem;
  }

  .page-about .about-sheet-stamp {
    display: block;
    position: absolute;
    left: 1.5rem;
    top: 2.4rem;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.3em;
    color: var(--stone);
    
  }
}

@media (min-width: 820px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cover-stamp {
    transform: none;
  }
}
<<<END>>>