.page-about {
  --about-rail-w: 230px;
  padding-top: clamp(92px, 12vw, 138px);
  padding-bottom: clamp(56px, 7vw, 104px);
  overflow-x: clip;
}

.page-about .breadcrumb {
  margin-bottom: clamp(28px, 4.5vw, 56px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4.5vw, 52px);
  padding-bottom: clamp(40px, 6vw, 80px);
  border-bottom: var(--rule);
}

.page-about .about-hero__lead .eyebrow {
  margin: 0 0 18px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.16;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(22px, 3vw, 30px);
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--text);
  max-width: 46ch;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--grid);
  border: var(--rule);
}

.page-about .about-hero__facts > div {
  background: var(--navy-900);
  padding: 16px 18px;
}

.page-about .about-hero__facts dt {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--white);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(40px, 5vw, 72px);
  }
}

/* ---------- 骨架：索引轨 + 主区 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(36px, 5vw, 60px);
  padding-top: clamp(40px, 6vw, 80px);
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(48px, 5vw, 88px);
  }
}

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

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border: var(--rule);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}

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

.page-about .about-rail__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 1040px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 30px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-top: var(--rule);
  }

  .page-about .about-rail__list > li {
    flex: 1 1 auto;
  }

  .page-about .about-rail__list a {
    border: none;
    border-bottom: var(--rule);
    padding: 13px 2px;
    white-space: normal;
    line-height: 1.4;
  }
}

.page-about .about-main {
  display: flex;
  flex-direction: column;
  gap: clamp(56px, 8vw, 108px);
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .chapter {
  scroll-margin-top: calc(var(--header-h) + 32px);
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: var(--rule);
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-about .chapter__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.32;
  color: var(--text);
}

.page-about .chapter p {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .chapter p:last-child {
  margin-bottom: 0;
}

.page-about .chapter a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .chapter a:hover {
  color: var(--lime);
}

/* ---------- 三类服务 ---------- */

.page-about .pillars {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 3.4vw, 40px);
  background: var(--grid);
  border: var(--rule);
}

@media (min-width: 760px) {
  .page-about .pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .pillar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--navy-800);
}

.page-about .pillar__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .pillar__title {
  margin: 0;
  font-family: var(--font-cn);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .pillar p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--text);
}

.page-about .pillar__link {
  margin-top: auto;
  padding-top: 14px;
  border-top: var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-decoration: none;
}

.page-about .pillar__link:hover {
  color: var(--lime);
}

/* ---------- 团队矩阵 ---------- */

.page-about .team-matrix {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 3.4vw, 40px);
  background: var(--grid);
  border: var(--rule);
}

@media (min-width: 640px) {
  .page-about .team-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .team-matrix {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .team-cell {
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--navy-900);
}

.page-about .team-cell__count {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .team-cell__name {
  margin: 0 0 10px;
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 800;
  color: var(--text);
}

.page-about .team-cell p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 图框 ---------- */

.page-about .media-frame {
  margin: clamp(24px, 3.4vw, 40px) 0 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 栏目清单 ---------- */

.page-about .channel-list {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
  border-top: var(--rule);
}

.page-about .channel-list > li {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 20px 0;
  border-bottom: var(--rule);
}

.page-about .channel-list__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-top: 4px;
}

.page-about .channel-list__name {
  margin: 0;
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}

.page-about .channel-list__desc {
  grid-column: 2;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.74;
  color: var(--text);
}

@media (min-width: 880px) {
  .page-about .channel-list > li {
    grid-template-columns: 66px 180px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 24px;
    padding: 22px 0;
  }

  .page-about .channel-list__num {
    padding-top: 0;
  }

  .page-about .channel-list__desc {
    grid-column: 3;
  }
}

/* ---------- 时间线 ---------- */

.page-about .timeline {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
  border-top: var(--rule);
}

.page-about .timeline__item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: var(--rule);
}

@media (min-width: 760px) {
  .page-about .timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 32px;
    padding: 26px 0;
  }
}

.page-about .timeline__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .timeline__year::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: translateY(-1px);
}

.page-about .timeline__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--text);
}

/* ---------- 评分带 ---------- */

.page-about .score-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3.4vw, 36px);
  background: var(--grid);
  border: var(--rule);
}

@media (min-width: 720px) {
  .page-about .score-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .score-band__cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background: var(--navy-800);
}

.page-about .score-band__k {
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 800;
  color: var(--text);
}

.page-about .score-band__r {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--purple);
}

/* ---------- 能力矩阵 ---------- */

.page-about .capability {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3.4vw, 40px);
  background: var(--grid);
  border: var(--rule);
}

@media (min-width: 720px) {
  .page-about .capability {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .capability {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .capability__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  background: var(--navy-900);
}

.page-about .capability__v {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.3vw, 26px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .capability__k {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 收束 ---------- */

.page-about .about-close {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  padding-top: clamp(36px, 5vw, 60px);
  border-top: var(--rule);
}

.page-about .about-close__line {
  margin: 0;
  max-width: 42ch;
  font-family: var(--font-cn);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--text);
}

@media (min-width: 760px) {
  .page-about .about-close {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
  }
}
<<<END>>>