.page-about {
  padding-bottom: 64px;
  overflow-x: clip;
}

.page-about .about-crumb-wrap {
  padding-top: 22px;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--white);
  margin: 10px 0 0;
  text-wrap: balance;
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--white);
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 8px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -40px 0 auto;
  height: 78%;
  background:
    linear-gradient(112deg, rgba(108, 59, 255, 0.3) 0%, rgba(108, 59, 255, 0) 48%),
    repeating-linear-gradient(100deg, rgba(0, 229, 255, 0.08) 0 1px, transparent 1px 120px);
  -webkit-mask-image: linear-gradient(180deg, #000 10%, transparent 96%);
  mask-image: linear-gradient(180deg, #000 10%, transparent 96%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(33px, 6.6vw, 64px);
  line-height: 1.06;
  letter-spacing: 0.005em;
  color: var(--white);
  margin: 14px 0 0;
  max-width: 18em;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line-strong);
}

.page-about .about-hero__facts li {
  background: var(--panel);
  padding: 14px 16px 16px;
  display: grid;
  gap: 5px;
  align-content: start;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__facts li:nth-child(2) .fact-num {
  color: var(--purple);
}

.page-about .about-hero__facts li:nth-child(3) .fact-num {
  color: var(--white);
}

.page-about .about-hero__facts li:nth-child(4) .fact-num {
  color: var(--orange);
}

.page-about .fact-label {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-about .about-hero__figure {
  margin: 6px 0 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 版本演进时间轴 ---------- */
.page-about .about-arc {
  padding: 64px 0 8px;
}

.page-about .about-arc__intro {
  margin: 14px 0 0;
  max-width: 60ch;
  color: var(--steel);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-arc__grid {
  margin-top: 36px;
  gap: 34px;
  align-items: start;
}

.page-about .arc-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
  display: grid;
  gap: 26px;
}

.page-about .arc-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--purple) 62%, rgba(108, 59, 255, 0.08));
}

.page-about .arc-node {
  position: relative;
  outline: none;
}

.page-about .arc-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 10px;
  height: 10px;
  background: var(--space-black);
  border: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: background var(--ease), border-color var(--ease);
}

.page-about .arc-node:hover::before,
.page-about .arc-node:focus-visible::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .arc-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 8px;
}

.page-about .arc-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .arc-node:hover .arc-year,
.page-about .arc-node:focus-visible .arc-year {
  color: var(--orange);
}

.page-about .arc-node h3 {
  margin: 7px 0 8px;
}

.page-about .arc-node p {
  margin: 0;
  max-width: 52ch;
  color: var(--steel);
  font-size: 15px;
  line-height: 1.82;
}

.page-about .arc-aside {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .arc-figure {
  margin: 0;
}

.page-about .arc-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .arc-file {
  background: var(--cream);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 rgba(34, 23, 8, 0.32);
  padding: 20px 20px 22px;
  transform: rotate(-1deg);
}

.page-about .arc-file__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink);
}

.page-about .arc-file__label::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  background: var(--orange);
  vertical-align: 1px;
}

.page-about .arc-file h3 {
  color: var(--ink);
  font-size: 21px;
  margin: 10px 0 8px;
}

.page-about .arc-file__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-about .arc-file__link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 2px;
}

.page-about .arc-file__link:hover {
  background: var(--orange);
  color: var(--cream);
}

.page-about .arc-file__link:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 64px 0 8px;
}

.page-about .about-team__intro {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--steel);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-team__grid {
  margin-top: 34px;
  gap: 32px;
  align-items: start;
}

.page-about .team-tree {
  display: grid;
  gap: 16px;
}

.page-about .team-tree__hub {
  margin: 0;
  padding: 12px 16px;
  border: 2px solid var(--cyan);
  background: linear-gradient(120deg, rgba(0, 229, 255, 0.18), rgba(108, 59, 255, 0.22));
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .team-tree__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-node {
  position: relative;
  background: var(--panel);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
  padding: 16px 18px 18px;
  outline: none;
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .team-node::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 16px;
  width: 7px;
  height: 7px;
  background: var(--purple);
  transition: background var(--ease), transform var(--ease);
}

.page-about .team-node:hover,
.page-about .team-node:focus-visible {
  transform: translateY(-3px);
  border-color: var(--purple);
}

.page-about .team-node:hover::after,
.page-about .team-node:focus-visible::after {
  background: var(--orange);
  transform: scale(1.6);
}

.page-about .team-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .team-node__num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .team-node h3 {
  margin: 9px 0 6px;
  font-size: 17px;
}

.page-about .team-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .about-team__figure {
  margin: 0;
  aspect-ratio: 16 / 10;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 覆盖 ---------- */
.page-about .about-scope {
  padding: 64px 0 8px;
}

.page-about .scope-stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2px;
  background: var(--line-strong);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.page-about .scope-stats li {
  background: var(--space-black);
  padding: 18px 16px 20px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .scope-stats li:nth-child(2n) {
  background: var(--panel);
}

.page-about .scope-num {
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .scope-stats li:nth-child(2) .scope-num {
  color: var(--purple);
}

.page-about .scope-stats li:nth-child(3) .scope-num {
  color: var(--white);
}

.page-about .scope-stats li:nth-child(5) .scope-num {
  color: var(--orange);
}

.page-about .scope-stats li:nth-child(6) .scope-num {
  color: var(--purple);
}

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

.page-about .scope-stats p {
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: 64px 0 8px;
}

.page-about .about-partners__grid {
  margin-top: 30px;
  gap: 30px;
  align-items: start;
}

.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: 2px solid var(--line-strong);
}

.page-about .partner-list li {
  position: relative;
  padding: 18px 0 20px 46px;
  border-bottom: 2px solid var(--line);
}

.page-about .partner-idx {
  position: absolute;
  left: 0;
  top: 21px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .partner-list h3 {
  font-size: 19px;
}

.page-about .partner-list p {
  margin: 7px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--steel);
}

.page-about .partner-cta {
  padding: 24px 22px 26px;
  border-color: var(--purple);
  background:
    linear-gradient(155deg, rgba(108, 59, 255, 0.42), rgba(10, 10, 18, 0.92) 72%),
    var(--panel);
  display: grid;
  gap: 12px;
  align-content: start;
  justify-items: start;
}

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

.page-about .partner-cta h3 {
  font-size: 22px;
  line-height: 1.3;
}

.page-about .partner-cta p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--white);
  opacity: 0.86;
}

/* ---------- 做事方式 ---------- */
.page-about .about-commit {
  padding: 64px 0 8px;
}

.page-about .commit-list {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 2px solid var(--line-strong);
}

.page-about .commit-list li {
  display: grid;
  gap: 6px;
  padding: 18px 0 20px;
  border-bottom: 2px solid var(--line);
}

.page-about .commit-key {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .commit-list li:nth-child(2) .commit-key {
  color: var(--orange);
}

.page-about .commit-list li:nth-child(3) .commit-key {
  color: var(--white);
}

.page-about .commit-list h3 {
  font-size: 18px;
}

.page-about .commit-list p {
  margin: 5px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: 64px 0 0;
}

.page-about .about-next__panel {
  border: 2px solid var(--line-strong);
  border-top-color: var(--cyan);
  background:
    linear-gradient(120deg, rgba(0, 229, 255, 0.14), rgba(108, 59, 255, 0.28) 66%, transparent),
    var(--panel);
  box-shadow: var(--shadow-hard);
  padding: 26px 22px 28px;
  display: grid;
  gap: 22px;
}

.page-about .about-next__panel h2 {
  margin-top: 10px;
}

.page-about .about-next__text {
  margin: 12px 0 0;
  max-width: 58ch;
  color: var(--steel);
  font-size: 15.5px;
  line-height: 1.82;
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero__inner {
    gap: 44px;
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 900px;
  }

  .page-about .fact-num {
    font-size: 28px;
  }

  .page-about .about-team__figure {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-next__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    padding: 34px 32px;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1040px) {
  .page-about .arc-aside {
    position: sticky;
    top: 92px;
  }
}

@media (min-width: 780px) {
  .page-about .commit-list li {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .arc-node,
  .page-about .arc-node::before,
  .page-about .team-node,
  .page-about .team-node::after {
    transition: none;
  }

  .page-about .team-node:hover,
  .page-about .team-node:focus-visible {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>