.page-about {
  display: block;
  color: var(--white);
  background: var(--ink-900);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 24px 0 4px;
  font-size: var(--fs-caption);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--cyan);
}

.page-about .breadcrumbs__sep {
  color: var(--ink-700);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-bottom: clamp(40px, 6vw, 72px);
  background-image:
    linear-gradient(to right, rgba(23, 41, 63, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 41, 63, 0.6) 1px, transparent 1px);
  background-size: 96px 96px;
  background-position: center top;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-hero__aside {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: 20px;
  border-radius: var(--radius-panel);
  background: var(--glass);
  border: 1px solid var(--glass-line);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-hero__main {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-hero__main .display-1 {
  margin: 0;
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .about-hero__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
}

/* 首屏索引清单 */
.page-about .about-index {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-about .about-index__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--glass-line);
  font-size: var(--fs-caption);
  color: var(--mist);
}

.page-about .about-index__item:last-child {
  border-bottom: 0;
}

.page-about .about-index__val {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--gold);
  white-space: nowrap;
}

/* ---------- 叙事主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-flow {
  display: grid;
  gap: 24px;
  min-width: 0;
}

/* ---------- 章节区块 ---------- */
.page-about .about-chapter {
  padding: clamp(24px, 3.4vw, 44px);
  border-radius: var(--radius-panel);
  background: var(--ink-800);
  min-width: 0;
}

.page-about .about-chapter--paper {
  background: var(--paper);
  color: var(--ink-900);
}

.page-about .about-chapter__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--white);
}

.page-about .about-chapter--paper .about-chapter__title {
  color: var(--ink-900);
}

.page-about .about-chapter__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  font-weight: 500;
  line-height: 1.65;
  color: var(--white);
}

.page-about .about-chapter--paper .about-chapter__lead {
  color: var(--ink-900);
}

.page-about .about-chapter p {
  margin: 14px 0 0;
  max-width: 68ch;
  color: var(--mist);
  line-height: 1.8;
}

.page-about .about-chapter--paper p {
  color: var(--ink-700);
}

.page-about .about-chapter h3 {
  margin: 28px 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: 0.07em;
  color: var(--white);
}

.page-about .about-chapter--paper h3 {
  color: var(--ink-900);
}

.page-about .about-chapter p strong {
  color: var(--gold);
  font-weight: 600;
}

.page-about .about-chapter--paper p strong {
  color: var(--ink-900);
}

/* ---------- 图片容器 ---------- */
.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .media-frame {
  margin: 26px 0 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  border-radius: var(--radius-panel);
  object-fit: cover;
}

.page-about .media-frame__caption {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-caption);
  color: var(--mist);
}

.page-about .about-chapter--paper .media-frame__caption {
  color: var(--ink-700);
}

/* ---------- 团队标签页 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 26px;
}

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

.page-about .about-team__out {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-team__out li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-caption);
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-team__out li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

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

/* ---------- 发展刻度 ---------- */
.page-about .about-scale {
  display: grid;
  margin-top: 26px;
}

.page-about .about-scale__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-top: 1px dashed var(--glass-line);
}

.page-about .about-scale__row:last-child {
  border-bottom: 1px dashed var(--glass-line);
}

.page-about .about-scale__year {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-about .about-chapter .about-scale__text {
  margin: 0;
  max-width: 72ch;
  font-size: var(--fs-body);
  color: var(--mist);
  line-height: 1.75;
}

.page-about .about-scale__figure {
  margin-top: 28px;
}

/* ---------- 适配流程 ---------- */
.page-about .about-steps {
  margin-top: 24px;
}

.page-about .about-chapter--paper .disclosure__trigger {
  color: var(--ink-900);
}

.page-about .about-chapter--paper .disclosure__panel p {
  color: var(--ink-700);
}

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

/* ---------- 结尾指引 ---------- */
.page-about .about-next {
  padding-top: clamp(56px, 7vw, 88px);
}

.page-about .about-next__panel {
  padding: clamp(28px, 4vw, 48px);
  border-radius: var(--radius-panel);
  background: var(--ink-800);
  border: 1px solid var(--glass-line);
}

.page-about .about-next__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-about .about-next__item {
  border-top: 1px dashed var(--glass-line);
}

.page-about .about-next__link {
  display: block;
  padding: 16px 0;
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--white);
  text-decoration: none;
  transition: color 180ms var(--ease);
}

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

.page-about .about-next__desc {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-caption);
  font-weight: 400;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-about .about-scale__row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 36px;
  }
}

@media (max-width: 1023px) {
  .page-about .about-hero__main {
    order: -1;
  }
}

/* ---------- 桌面：窄刻度轨道 + 宽内容栏 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-body {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 104px;
  }

  .page-about .about-rail__list {
    position: relative;
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 20px;
  }

  .page-about .about-rail__list::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--glass-line);
  }

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

  .page-about .about-rail__link {
    position: relative;
    display: grid;
    gap: 2px;
    padding-left: 18px;
    text-decoration: none;
    color: var(--mist);
    transition: color 160ms var(--ease);
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 4px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    border: 1px solid var(--cyan);
    background: var(--ink-900);
  }

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

  .page-about .about-rail__num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    font-variant-numeric: tabular-nums;
    color: var(--gold);
  }

  .page-about .about-rail__label {
    font-size: 0.75rem;
    line-height: 1.4;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 36px;
  }

  .page-about .about-chapter {
    padding: clamp(32px, 3.4vw, 48px);
  }
}

@media (min-width: 1280px) {
  .page-about .about-body {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 56px;
  }
}
<<<END>>>