.page-about {
  --about-tick: rgba(143, 163, 189, 0.28);
  --about-soft-lake: rgba(30, 155, 155, 0.22);
  --about-soft-sun: rgba(240, 138, 75, 0.22);
  --about-tl-indent: 26px;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.22;
  font-size: clamp(1.45rem, 4.6vw, 2.15rem);
  color: var(--ink);
  margin: 0 0 12px;
  text-wrap: balance;
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-about p {
  margin: 0 0 12px;
  color: var(--mist);
  line-height: 1.78;
  font-size: 0.98rem;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 18px 0 6px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -14%;
  right: -14%;
  top: 6%;
  height: 280px;
  background: linear-gradient(115deg, rgba(30, 155, 155, 0.2), rgba(91, 91, 214, 0.12) 55%, rgba(8, 18, 38, 0) 82%);
  transform: rotate(-7deg);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--line-strong);
  box-shadow: 8px 8px 0 rgba(8, 18, 38, 0.7);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
  font-size: clamp(1.85rem, 7vw, 3.5rem);
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 34em;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats li {
  border-top: 2px solid var(--lake);
  padding-top: 10px;
  min-width: 0;
}

.page-about .about-hero__stats b {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.15rem, 4.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.page-about .about-hero__stats span {
  display: block;
  margin-top: 4px;
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.page-about .about-index {
  display: flex;
  gap: 8px;
  margin-top: 24px;
  padding: 16px 0 4px;
  border-top: 1px dashed var(--about-tick);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index a {
  flex: 0 0 auto;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-decoration: none;
  background: var(--night-2);
  border: 1px solid var(--line-strong);
  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--night);
  background: var(--lake);
  border-color: var(--lake);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 6px 0 40px;
  scroll-margin-top: 86px;
}

.page-about .about-head {
  max-width: 46em;
  margin-bottom: 24px;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 24px;
  margin-top: 20px;
}

.page-about .about-origin__copy {
  max-width: 46em;
  min-width: 0;
}

.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-principles li {
  border-left: 3px solid var(--lake);
  background: var(--night-2);
  padding: 14px 16px;
}

.page-about .about-principles b {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--lake);
}

.page-about .about-principles p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-tl-indent);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--lake), rgba(30, 155, 155, 0.25) 55%, rgba(240, 138, 75, 0.55));
}

.page-about .timeline__item {
  position: relative;
  margin-bottom: 14px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--about-tl-indent) + 2px);
  top: 17px;
  width: 10px;
  height: 10px;
  background: var(--night);
  border: 2px solid var(--lake);
}

.page-about .stage {
  background: var(--night-3);
  border: 2px solid var(--line-strong);
  box-shadow: 5px 5px 0 rgba(30, 155, 155, 0.14);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-about .stage[open] {
  border-color: var(--lake);
  box-shadow: 6px 6px 0 var(--about-soft-lake);
}

.page-about .stage__summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 12px;
  padding: 14px 16px;
}

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

.page-about .stage__summary:focus-visible {
  outline: 2px solid var(--sunset);
  outline-offset: -2px;
}

.page-about .stage__num {
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--lake);
}

.page-about .stage__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.98rem;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .stage__tag {
  justify-self: end;
  white-space: nowrap;
  padding: 3px 7px;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--night);
  background: var(--sand);
}

.page-about .stage[open] .stage__tag {
  background: var(--sunset);
}

.page-about .stage__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line);
  margin-top: 4px;
  padding-top: 12px;
}

.page-about .stage__body p {
  font-size: 0.91rem;
  line-height: 1.74;
}

.page-about .timeline__plate {
  margin: 24px 0 0;
  border: 2px solid var(--line-strong);
  overflow: hidden;
}

.page-about .timeline__plate img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 24px;
  margin-top: 20px;
}

.page-about .about-team__intro {
  min-width: 0;
  max-width: 40em;
}

.page-about .about-team__count {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-team__count .mono {
  font-size: 2.3rem;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

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

.page-about .crew__item {
  background: var(--night-2);
  border: 2px solid var(--line);
  border-top: 3px solid var(--sunset);
  padding: 16px;
  box-shadow: 5px 5px 0 rgba(8, 18, 38, 0.7);
}

.page-about .crew__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.8rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--sunset);
}

.page-about .crew__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
}

.page-about .checks {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .checks li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .checks .mono {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--lake);
  padding-top: 4px;
}

.page-about .checks h3 {
  margin: 0;
}

.page-about .checks p {
  grid-column: 2;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
}

/* ---------- 收藏 ---------- */
.page-about .about-collection {
  display: grid;
  gap: 24px;
  margin-top: 20px;
}

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

.page-about .classify {
  margin: 18px 0 22px;
  display: grid;
  gap: 0;
}

.page-about .classify > div {
  padding: 11px 0;
  border-bottom: 1px dashed var(--about-tick);
}

.page-about .classify > div:first-child {
  border-top: 1px dashed var(--about-tick);
}

.page-about .classify dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--lake);
  margin-bottom: 4px;
}

.page-about .classify dd {
  margin: 0;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.72;
}

.page-about .about-collection__figure {
  margin: 0;
  aspect-ratio: 10 / 7;
  border: 2px solid var(--line-strong);
  box-shadow: 8px 8px 0 rgba(8, 18, 38, 0.7);
  overflow: hidden;
}

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

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 20px;
  padding: 22px 20px;
  background:
    linear-gradient(160deg, rgba(30, 155, 155, 0.12), rgba(8, 18, 38, 0) 62%),
    var(--night-2);
  border: 2px solid var(--line-strong);
}

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

.page-about .about-partners__lead .mono {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 2.6rem;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lake);
  margin-bottom: 10px;
}

.page-about .about-partners__lead p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.72;
}

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

.page-about .about-partners__list li {
  border-left: 2px solid var(--sunset);
  padding-left: 12px;
}

.page-about .about-partners__list p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
}

.page-about .about-partners > .btn {
  justify-self: start;
}

/* ---------- 服务承诺 ---------- */
.page-about .about-values__panel {
  position: relative;
  overflow: hidden;
  margin-top: 20px;
  padding: 26px 20px;
  border: 2px solid var(--lake);
  background:
    linear-gradient(140deg, rgba(240, 138, 75, 0.16), rgba(8, 18, 38, 0) 58%),
    var(--night-2);
  box-shadow: 8px 8px 0 var(--about-soft-lake);
}

.page-about .about-values__list {
  list-style: none;
  margin: 16px 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-values__list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.92rem;
  line-height: 1.74;
  color: var(--mist);
}

.page-about .about-values__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 10px;
  height: 2px;
  background: var(--sunset);
}

.page-about .about-values__list strong {
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-values__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-top-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.page-about .about-top-link:hover,
.page-about .about-top-link:focus-visible {
  color: var(--lake);
  border-bottom-color: var(--lake);
}

/* ---------- 窄屏修正 ---------- */
@media (max-width: 480px) {
  .page-about .stage__summary {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .page-about .stage__tag {
    grid-column: 2;
    justify-self: start;
  }

  .page-about .about-hero__stats span {
    font-size: 0.7rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about {
    --about-tl-indent: 34px;
  }

  .page-about .about-hero {
    padding-top: 28px;
  }

  .page-about .about-hero::before {
    height: 380px;
    top: 4%;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: 36px;
    align-items: center;
  }

  .page-about .about-index {
    margin-top: 28px;
    padding-top: 20px;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-origin__copy {
    max-width: none;
  }

  .page-about .timeline::before {
    left: 8px;
  }

  .page-about .timeline__item::before {
    left: calc(-1 * var(--about-tl-indent) + 3px);
    top: 20px;
  }

  .page-about .stage__summary {
    padding: 16px 20px;
  }

  .page-about .stage__body {
    padding: 14px 20px 18px;
  }

  .page-about .stage__title {
    font-size: 1.06rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .checks li {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 4px 16px;
    padding: 18px 0;
  }

  .page-about .about-collection {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-collection__figure {
    margin-top: 6px;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 22px 32px;
    padding: 30px 32px;
  }

  .page-about .about-partners__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-partners > .btn {
    grid-column: 1 / -1;
  }

  .page-about .about-values__panel {
    padding: 38px 36px;
  }

  .page-about .about-values__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin: 20px 0 26px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__figure {
    aspect-ratio: 16 / 9;
  }

  .page-about .crew__item {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .stage,
  .page-about .about-index a,
  .page-about .about-crumb a,
  .page-about .about-top-link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>