.page-about {
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about p {
  margin: 0;
}

.page-about a {
  color: inherit;
}

.page-about .about-shell {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(16px, 3vw, 36px) var(--gutter) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
}

/* ---------- 侧边章节抽屉 ---------- */

.page-about .about-rail {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel-soft);
  padding: 10px 14px 12px;
}

.page-about .about-rail-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  cursor: pointer;
  padding: 4px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

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

.page-about .about-rail-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--lime);
  letter-spacing: .1em;
}

.page-about .about-rail-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-rail-list a:hover,
.page-about .about-rail-list a:focus-visible {
  color: var(--bone);
  border-bottom-color: var(--lime);
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--sand);
}

.page-about .about-rail-foot {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
  opacity: .7;
}

/* ---------- 正文容器 ---------- */

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

.page-about .breadcrumb {
  margin-bottom: clamp(14px, 2vw, 24px);
}

.page-about .about-h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 72px);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-about .about-lede {
  margin-top: 18px;
  max-width: 50ch;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.72;
  color: rgba(242, 245, 239, .86);
}

.page-about .about-text {
  margin-top: 14px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(242, 245, 239, .76);
}

.page-about .about-text a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .4);
  padding-bottom: 1px;
}

.page-about .about-text a:hover,
.page-about .about-text a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  padding-bottom: clamp(26px, 3.4vw, 44px);
  scroll-margin-top: 96px;
}

.page-about .about-hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 10px 0;
  background: var(--ink);
}

.page-about .fact-k {
  min-width: 62px;
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .fact-v {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 通用区块 ---------- */

.page-about .about-block {
  border-top: 1px solid var(--line-soft);
  padding-block: clamp(30px, 4.6vw, 64px);
  scroll-margin-top: 96px;
}

.page-about .about-block-head {
  max-width: 64ch;
  margin-bottom: clamp(20px, 2.8vw, 34px);
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 3.6vw, 40px);
  font-weight: 300;
  line-height: 1.18;
  letter-spacing: -0.005em;
  color: var(--bone);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: 14px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--sand) 0%, var(--lime) 58%, rgba(198, 255, 61, 0) 100%);
}

.page-about .about-tl-item {
  position: relative;
  padding: 14px 16px 16px;
  background: var(--panel-soft);
  border-left: 1px solid var(--line);
  border-radius: 0 0 18px 0;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--sand);
  background: var(--ink);
}

.page-about .about-tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .about-tl-title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--bone);
}

.page-about .about-tl-text {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(242, 245, 239, .72);
  max-width: 60ch;
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  position: relative;
  margin: 20px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0 0 22px 0;
  background: var(--panel-soft);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.68) contrast(1.06);
}

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--mist);
}

.page-about .about-figure--split img {
  aspect-ratio: 16 / 6;
}

/* ---------- 团队角色 ---------- */

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-role {
  position: relative;
  padding: 16px 16px 18px;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--lime), rgba(198, 255, 61, 0) 72%);
}

.page-about .about-role-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--sand);
}

.page-about .about-role-name {
  margin: 7px 0 7px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--bone);
}

.page-about .about-role-text {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 245, 239, .74);
}

/* ---------- 服务原则 ---------- */

.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-principles li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  column-gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-pr-num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  color: var(--lime);
  opacity: .9;
}

.page-about .about-pr-title {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--bone);
}

.page-about .about-pr-text {
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(242, 245, 239, .74);
}

.page-about .about-pr-text a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .4);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-eco .about-figure {
  margin-top: 0;
}

.page-about .about-eco-stats {
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-eco-stats li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  background: var(--ink);
}

.page-about .about-eco-num {
  min-width: 56px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--signal);
}

.page-about .about-eco-label {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 信任与联系 ---------- */

.page-about .about-stats {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
}

.page-about .about-stats li {
  background: var(--ink);
  padding: 15px 12px;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.1;
  color: var(--bone);
}

.page-about .stat-num em {
  font-style: normal;
  font-size: .62em;
  color: var(--lime);
  margin-left: 2px;
}

.page-about .stat-label {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding: 18px;
  margin-bottom: 26px;
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-soft) 100%);
  border-left: 2px solid var(--lime);
  border-radius: 0 0 20px 0;
}

.page-about .about-cta-title {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--bone);
}

.page-about .about-cta-text {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 245, 239, .76);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-about .about-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-contact li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-about .about-contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .about-contact a,
.page-about .about-contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--bone);
  text-decoration: none;
  word-break: break-word;
}

.page-about .about-contact a {
  border-bottom: 1px solid rgba(198, 255, 61, .35);
  justify-self: start;
}

.page-about .about-contact a:hover,
.page-about .about-contact a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 响应式 ---------- */

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

  .page-about .about-contact li {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 780px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 22px 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-eco .about-figure {
    margin-top: 2px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 88px;
    background: transparent;
    border: 0;
    border-left: 1px solid var(--line);
    border-radius: 0;
    padding: 0 0 0 16px;
  }

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

  .page-about .about-rail-list {
    margin-top: 0;
  }

  .page-about .about-rail-foot {
    margin-top: 20px;
  }

  .page-about .about-principles li {
    grid-template-columns: 62px minmax(0, 1fr);
    column-gap: 18px;
    padding: 20px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-list a,
  .page-about .about-contact a {
    transition: none;
  }
}
<<<END>>>