.page-about {
  --about-rail: 14rem;
  --about-gap: clamp(1.5rem, 4vw, 3.25rem);
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}
.page-about .breadcrumb,
.page-about .breadcrumb a {
  color: var(--mist);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--paper);
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  overflow: hidden;
  padding: clamp(2.25rem, 6vw, 3.75rem) 0 clamp(2.75rem, 7vw, 5rem);
  border-bottom: 1px solid var(--line);
}
.page-about .about-cover::after {
  content: "";
  position: absolute;
  inset: auto -14% -58% 42%;
  height: 24rem;
  background: radial-gradient(ellipse at 32% 32%, rgba(232, 121, 43, 0.20), rgba(10, 26, 42, 0) 68%);
  pointer-events: none;
}
.page-about .about-cover__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 5vw, 3rem);
}
.page-about .about-cover__lede {
  margin: clamp(1rem, 2.5vw, 1.5rem) 0 0;
  max-width: 44ch;
  color: var(--paper);
}
.page-about .about-cover__actions {
  margin-top: clamp(1.5rem, 3vw, 2rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.page-about .about-cover__meta {
  display: grid;
  gap: 0.85rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(23, 57, 90, 0.72), rgba(16, 42, 64, 0.48));
  box-shadow: var(--shadow);
}
.page-about .about-meta__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--line);
}
.page-about .about-meta__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-meta__k {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.page-about .about-meta__v {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  color: var(--gold);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  border-top: 1px solid var(--line);
}
.page-about .about-chapter--ivory {
  background: var(--ivory);
  color: var(--graphite);
  border-top-color: transparent;
}
.page-about .about-chapter--panel {
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
}

.page-about .chapter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 3vw, 2rem);
}
.page-about .chapter-rail {
  position: relative;
  display: grid;
  align-content: start;
  gap: 0.4rem;
  padding-left: 1.6rem;
}
.page-about .chapter-rail::before {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 0.6rem;
  bottom: 0.2rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(217, 169, 76, 0.05));
}
.page-about .chapter-rail::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.36rem;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink-900);
}
.page-about .about-chapter--ivory .chapter-rail::after {
  background: var(--ivory);
}
.page-about .about-chapter--panel .chapter-rail::after {
  background: var(--ink-800);
}
.page-about .chapter-rail__mark {
  margin: 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--gold);
}
.page-about .chapter-rail__note {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .about-chapter--ivory .chapter-rail__note {
  color: rgba(27, 38, 51, 0.62);
}

.page-about .chapter-body {
  display: grid;
  gap: clamp(0.9rem, 2.2vw, 1.35rem);
}
.page-about .chapter-body p {
  margin: 0;
  max-width: 62ch;
}
.page-about .about-chapter--ivory .chapter-body p {
  color: rgba(27, 38, 51, 0.86);
}

/* ---------- 过渡图版 ---------- */
.page-about .about-plate {
  margin: 0;
  padding: clamp(1.5rem, 5vw, 2.5rem) 0 clamp(2rem, 6vw, 3.25rem);
}
.page-about .about-plate img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.page-about .about-plate .figure__caption {
  margin-top: 0.85rem;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 七次升级 ---------- */
.page-about .arc__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}
.page-about .arc__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.page-about .arc__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .arc__track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.2rem;
}
.page-about .arc__track::before {
  content: "";
  position: absolute;
  left: 0.62rem;
  top: 0.85rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(217, 169, 76, 0.06) 100%);
}
.page-about .arc__item {
  position: relative;
  padding: 0 0 clamp(1.6rem, 3.6vw, 2.4rem) clamp(2.1rem, 5vw, 2.9rem);
}
.page-about .arc__item:last-child {
  padding-bottom: 0;
}
.page-about .arc__item::before {
  content: "";
  position: absolute;
  left: 0.2rem;
  top: 0.42rem;
  width: 0.86rem;
  height: 0.86rem;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--ink-900);
  transition: background 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}
.page-about .arc__item:hover::before,
.page-about .arc__item.is-visible::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 6px rgba(217, 169, 76, 0.12);
}
.page-about .arc__year {
  display: block;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}
.page-about .arc__title {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2.4vw, 1.3rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}
.page-about .arc__text {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(237, 231, 217, 0.78);
  transition: color 0.3s ease;
}
.page-about .arc__item:hover .arc__text {
  color: rgba(237, 231, 217, 0.95);
}

/* ---------- 档案室小组 ---------- */
.page-about .crew {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  border-top: 1px solid rgba(27, 38, 51, 0.16);
}
.page-about .crew .accordion__item {
  border-bottom: 1px solid rgba(27, 38, 51, 0.16);
}
.page-about .crew .crew__trigger {
  display: flex;
  align-items: baseline;
  gap: 0.95rem;
  width: 100%;
  padding: clamp(1rem, 2.4vw, 1.35rem) 0;
  text-align: left;
  font-family: var(--serif);
  font-size: clamp(1rem, 2.2vw, 1.18rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--graphite);
  background: none;
  border: 0;
  cursor: pointer;
}
.page-about .crew__no {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}
.page-about .crew__name {
  flex: 1;
}
.page-about .crew .crew__panel {
  padding: 0 0 clamp(1rem, 2.4vw, 1.4rem);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(27, 38, 51, 0.82);
}
.page-about .crew .crew__panel p {
  margin: 0;
  max-width: 62ch;
}
.page-about .crew .crew__panel a {
  color: var(--ink-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 服务范围 ---------- */
.page-about .reach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}
.page-about .reach__list {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}
.page-about .reach__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(237, 231, 217, 0.82);
}
.page-about .reach__list b {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--jade);
  white-space: nowrap;
}
.page-about .reach__actions {
  margin-top: clamp(1.5rem, 3vw, 2rem);
}
.page-about .reach__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.page-about .reach__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 公开信息 ---------- */
.page-about .record-panel {
  display: grid;
  gap: 0.9rem;
  padding: clamp(1.35rem, 3.5vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(16, 42, 64, 0.92), rgba(10, 26, 42, 0.72));
  box-shadow: var(--shadow);
}
.page-about .record-panel__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem 1.25rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px dashed var(--line);
}
.page-about .record-panel__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .record-panel__k {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
.page-about .record-panel__v,
.page-about .record-panel__link {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--paper);
}
.page-about .record-panel__link {
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease;
}
.page-about .record-panel__link:hover,
.page-about .record-panel__link:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-about .chapter-grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
  .page-about .reach__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 960px) {
  .page-about .arc__grid {
    grid-template-columns: minmax(13rem, 19rem) minmax(0, 1fr);
    align-items: start;
  }
}

@media (max-width: 560px) {
  .page-about .about-cover__actions .btn,
  .page-about .reach__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
  .page-about .record-panel__row {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .arc__item::before,
  .page-about .arc__text,
  .page-about .record-panel__link {
    transition: none;
  }
}
<<<END>>>