.page-about {
  --about-pad: clamp(20px, 3.2vw, 44px);
  --about-gap: clamp(24px, 3.4vw, 44px);
  --about-line: 1px solid var(--ink-500);
  --about-line-paper: 1px solid rgba(180, 85, 47, .26);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(16px, 2.6vw, 30px);
  font-size: 13px;
  color: var(--mist-200);
}
.page-about .breadcrumbs a {
  color: var(--mist-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}
.page-about .breadcrumbs a:hover {
  color: var(--white-soft);
  border-bottom-color: var(--glow-amber);
}
.page-about .breadcrumbs__sep {
  color: var(--ink-500);
}
.page-about .breadcrumbs__current {
  color: var(--white-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(26px, 4.4vw, 52px) clamp(30px, 4.6vw, 60px);
  border-bottom: 2px solid var(--ink-500);
}
.page-about .about-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--celadon);
}
.page-about .about-hero__eyebrow::before {
  content: "";
  flex: none;
  width: clamp(24px, 4vw, 44px);
  height: 1px;
  background: currentColor;
}
.page-about .about-hero__title {
  margin: 0;
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(2.3rem, 7vw, 5rem);
  line-height: 1.06;
  letter-spacing: .03em;
  color: var(--white-soft);
  max-width: 14em;
}
.page-about .about-hero__lede {
  margin: clamp(18px, 2.8vw, 30px) 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--mist-200);
}
.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: clamp(14px, 2vw, 20px) 0 0;
  border-top: var(--about-line);
}
.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-right: clamp(18px, 3vw, 36px);
  margin-right: clamp(18px, 3vw, 36px);
  border-right: var(--about-line);
  font-size: 13px;
}
.page-about .about-hero__facts li:last-child {
  padding-right: 0;
  margin-right: 0;
  border-right: 0;
}
.page-about .about-hero__key {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-500);
}
.page-about .about-hero__val {
  font-family: var(--mono);
  color: var(--white-soft);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
  padding-block: clamp(30px, 4.6vw, 64px) clamp(52px, 8vw, 104px);
  align-items: start;
}
@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
  }
}

/* ---------- 左侧索引 ---------- */
.page-about .toc-rail {
  min-width: 0;
}
.page-about .toc-rail__label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--ink-500);
}
.page-about .toc-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .toc-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 10px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--mist-200);
  text-decoration: none;
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.page-about .toc-rail__link:hover {
  color: var(--white-soft);
  border-color: var(--glow-amber);
}
.page-about .toc-rail__link.is-current {
  color: var(--ink-900);
  background: var(--glow-amber);
  border-color: var(--glow-amber);
}
.page-about .toc-rail__num {
  font-family: var(--mono);
  font-size: 11px;
  opacity: .7;
}
@media (min-width: 960px) {
  .page-about .toc-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
  .page-about .toc-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
    border-left: var(--about-line);
  }
  .page-about .toc-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    padding: 9px 12px;
    transition: color .2s ease, border-color .2s ease, background-color .2s ease;
  }
  .page-about .toc-rail__link:hover {
    border-left-color: var(--glow-amber);
  }
  .page-about .toc-rail__link.is-current {
    color: var(--white-soft);
    background: rgba(255, 196, 107, .1);
    border-left-color: var(--glow-amber);
  }
}

/* ---------- 面板骨架 ---------- */
.page-about .about-body {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
  min-width: 0;
}
.page-about .about-panel {
  position: relative;
  min-width: 0;
  padding: var(--about-pad);
  border-radius: var(--radius);
}
.page-about .about-panel--ink {
  background: var(--ink-700);
  border: 2px solid var(--ink-500);
  box-shadow: var(--hard-shadow);
  color: var(--mist-200);
}
.page-about .about-panel--paper {
  background: var(--paper-100);
  border: 2px solid var(--paper-300);
  box-shadow: 6px 6px 0 rgba(11, 22, 34, .34);
  color: var(--ink-700);
}
.page-about .about-panel__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 18px);
  padding-bottom: clamp(12px, 1.8vw, 18px);
  margin-bottom: clamp(16px, 2.4vw, 28px);
  border-bottom: var(--about-line);
}
.page-about .about-panel--paper .about-panel__head {
  border-bottom: var(--about-line-paper);
}
.page-about .about-panel__num {
  flex: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal-orange);
}
.page-about .about-panel--paper .about-panel__num {
  color: var(--clay-600);
}
.page-about .about-panel__title {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(1.3rem, 2.5vw, 1.9rem);
  line-height: 1.26;
  letter-spacing: .03em;
  color: var(--white-soft);
}
.page-about .about-panel--paper .about-panel__title {
  color: var(--ink-900);
}

/* ---------- 正文与图文分栏 ---------- */
.page-about .about-panel__text {
  font-size: 16px;
  line-height: 1.78;
}
.page-about .about-panel__text p {
  margin: 0 0 14px;
  max-width: 38em;
}
.page-about .about-panel__text p:last-child {
  margin-bottom: 0;
}
.page-about .about-panel__text--after {
  margin-top: clamp(16px, 2.2vw, 24px);
  padding-top: clamp(14px, 2vw, 20px);
  border-top: var(--about-line-paper);
}
.page-about .about-panel__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.8vw, 34px);
  align-items: start;
}
@media (min-width: 760px) {
  .page-about .about-panel__split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

/* ---------- 图片壳 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  background: var(--ink-900);
  overflow: hidden;
}
.page-about .about-figure--paper {
  margin-top: clamp(18px, 2.6vw, 28px);
  border-color: var(--paper-300);
  background: var(--paper-300);
}
.page-about .about-figure--timeline {
  margin-top: clamp(16px, 2.4vw, 26px);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 四类服务入口 ---------- */
.page-about .about-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
}
@media (min-width: 640px) {
  .page-about .about-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
.page-about .about-channels__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 12px;
  padding: 14px 16px;
  background: rgba(11, 22, 34, .5);
  border: 1px solid var(--ink-500);
  border-left: 3px solid var(--celadon);
  border-radius: var(--radius);
  transition: border-color .2s ease, transform .2s ease;
}
.page-about .about-channels__item:hover {
  border-color: var(--glow-amber);
  border-left-color: var(--glow-amber);
  transform: translateY(-2px);
}
.page-about .about-channels__item--hot {
  border-left-color: var(--signal-orange);
}
.page-about .about-channels__item--hot:hover {
  border-left-color: var(--signal-orange);
}
.page-about .about-channels__num {
  grid-row: span 2;
  align-self: start;
  padding-top: 2px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-500);
}
.page-about .about-channels__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--white-soft);
}
.page-about .about-channels__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-200);
}
.page-about .about-panel__foot {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: clamp(14px, 2vw, 20px);
  border-top: var(--about-line);
  max-width: 40em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-200);
}
.page-about .about-panel__foot a {
  color: var(--glow-amber);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.page-about .about-panel__foot a:hover {
  color: var(--white-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
}
@media (min-width: 720px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-team__item {
  padding: 18px;
  background: rgba(255, 255, 255, .42);
  border: 2px solid var(--paper-300);
  border-radius: var(--radius);
  transition: border-color .2s ease, transform .2s ease;
}
.page-about .about-team__item:hover {
  border-color: var(--clay-600);
  transform: translateY(-2px);
}
.page-about .about-team__role {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink-900);
}
.page-about .about-team__count {
  display: block;
  margin: 8px 0 12px;
  font-family: var(--mono);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--clay-600);
}
.page-about .about-team__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink-700);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
}
@media (min-width: 880px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .about-node {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 16px 18px;
  background: var(--ink-900);
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.page-about .about-node:hover,
.page-about .about-node:focus-within {
  transform: translateY(-2px);
  border-color: var(--glow-amber);
  box-shadow: 0 0 0 1px rgba(255, 196, 107, .35);
}
.page-about .about-node--next {
  border-style: dashed;
  border-color: var(--glow-amber);
  background: rgba(255, 196, 107, .07);
}
.page-about .about-node__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--signal-orange);
}
.page-about .about-node--next .about-node__num {
  color: var(--glow-amber);
}
.page-about .about-node__stage {
  font-family: var(--display);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--white-soft);
}
.page-about .about-node__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--mist-200);
}

/* ---------- 规模数字 ---------- */
.page-about .about-stats {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  border-top: var(--about-line-paper);
}
.page-about .about-stats__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  padding: clamp(11px, 1.6vw, 15px) 2px;
  border-bottom: var(--about-line-paper);
}
.page-about .about-stats__key {
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--ink-700);
}
.page-about .about-stats__val {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.35rem, 3.2vw, 1.95rem);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--clay-600);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
}
@media (min-width: 720px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-partners__item {
  padding: 18px 16px;
  background: var(--ink-900);
  border: 1px solid var(--ink-500);
  border-top: 3px solid var(--celadon);
  border-radius: var(--radius);
  transition: border-color .2s ease, transform .2s ease;
}
.page-about .about-partners__item:hover {
  border-color: var(--glow-amber);
  border-top-color: var(--celadon);
  transform: translateY(-2px);
}
.page-about .about-partners__count {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  line-height: 1;
  color: var(--celadon);
}
.page-about .about-partners__title {
  margin: 12px 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--white-soft);
}
.page-about .about-partners__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist-200);
}

/* ---------- 联系方式 ---------- */
.page-about .about-contact {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  border-top: var(--about-line-paper);
}
.page-about .about-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: clamp(11px, 1.6vw, 15px) 2px;
  border-bottom: var(--about-line-paper);
}
@media (min-width: 620px) {
  .page-about .about-contact__row {
    grid-template-columns: 84px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}
.page-about .about-contact__key {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--clay-600);
}
.page-about .about-contact__val {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  min-width: 0;
}
.page-about .about-contact__text {
  font-family: var(--mono);
  font-size: 14.5px;
  line-height: 1.6;
  word-break: break-word;
  color: var(--ink-900);
}
.page-about .about-contact__note,
.page-about .about-contact__action {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.74;
  color: var(--ink-700);
}
.page-about .about-contact__action a {
  color: var(--clay-600);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}
.page-about .about-contact__action a:hover {
  color: var(--ink-900);
}
.page-about .about-meta {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding-top: clamp(12px, 1.8vw, 18px);
  border-top: var(--about-line-paper);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-500);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-channels__item,
  .page-about .about-team__item,
  .page-about .about-node,
  .page-about .about-partners__item {
    transition: none;
  }
  .page-about .about-channels__item:hover,
  .page-about .about-team__item:hover,
  .page-about .about-node:hover,
  .page-about .about-node:focus-within,
  .page-about .about-partners__item:hover {
    transform: none;
  }
}
<<<END>>>