.page-about {
  --about-lead: 168px;
  --about-rule: rgba(143, 168, 160, 0.22);
  --about-rule-paper: rgba(13, 23, 20, 0.14);
  background: var(--ink-900);
  color: var(--paper);
}

.page-about .ps-crumbs {
  margin-bottom: 26px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: 24px 84px;
  background:
    radial-gradient(110% 82% at 84% -6%, rgba(60, 232, 192, 0.16), transparent 58%),
    linear-gradient(180deg, #0A1C17 0%, #0A1C17 58%, #102A22 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  block-size: 1px;
  background: linear-gradient(90deg, transparent, var(--line-cyan) 28%, var(--line-cyan) 72%, transparent);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
}

@media (min-width: 940px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    gap: 56px;
    align-items: end;
  }
}

.page-about .about-hero__lead h1 {
  margin: 14px 0 20px;
}

.page-about .about-hero__lead .ps-lede {
  max-width: 56ch;
  color: var(--mist);
}

.page-about .about-hero__jump {
  margin: 26px 0 0;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
}

.page-about .about-hero__media img {
  display: block;
  inline-size: 100%;
  block-size: auto;
  aspect-ratio: 7 / 5;
  object-fit: cover;
  border: 1px solid var(--line-cyan);
  background: var(--ink-800);
}

.page-about .about-hero__media .ps-media__caption {
  margin-top: 10px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 48px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border-block: 1px solid var(--about-rule);
}

@media (min-width: 760px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-hero__facts li {
  padding: 20px 18px;
  background: rgba(10, 28, 23, 0.72);
}

.page-about .about-hero__num {
  display: block;
  font-size: clamp(26px, 6vw, 36px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-hero__unit {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  position: relative;
  padding-block: 68px;
  background: var(--ink-900);
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    padding-block: 124px;
  }
}

.page-about .about-chapter--paper {
  background: var(--paper);
  color: var(--text-dark);
}

.page-about .about-chapter--close {
  padding-bottom: 96px;
  background:
    radial-gradient(90% 70% at 12% 100%, rgba(255, 122, 43, 0.14), transparent 62%),
    linear-gradient(180deg, #0A1C17 0%, #102A22 100%);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 22px;
}

@media (min-width: 900px) {
  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-lead) minmax(0, 1fr);
    gap: 52px;
  }
}

.page-about .about-chapter__aside {
  padding-left: 14px;
  border-left: 1px solid var(--line-cyan);
}

.page-about .about-chapter--paper .about-chapter__aside {
  border-left-color: var(--about-rule-paper);
}

@media (min-width: 900px) {
  .page-about .about-chapter__aside {
    position: sticky;
    top: calc(var(--frame-h) + 28px);
    align-self: start;
  }
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(42px, 9vw, 78px);
  line-height: 0.86;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: rgba(60, 232, 192, 0.3);
  transition: color 0.28s var(--ease);
}

.page-about .about-chapter--paper .about-chapter__num {
  color: rgba(13, 23, 20, 0.18);
}

.page-about .about-chapter__num:hover,
.page-about .about-chapter__num:focus-visible,
.page-about .about-chapter__num[aria-current="true"] {
  color: var(--cyan);
}

.page-about .about-chapter--paper .about-chapter__num:hover,
.page-about .about-chapter--paper .about-chapter__num:focus-visible,
.page-about .about-chapter--paper .about-chapter__num[aria-current="true"] {
  color: var(--ink-900);
}

.page-about .about-chapter__mark {
  margin: 14px 0 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-chapter--paper .about-chapter__mark {
  color: #5C6E67;
}

.page-about .about-chapter__body h2 {
  margin: 0 0 22px;
  max-width: 22ch;
}

.page-about .about-chapter__body p {
  max-width: 66ch;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-chapter--paper .about-chapter__body p {
  color: rgba(13, 23, 20, 0.76);
}

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

/* ---------- 团队三段刻度 ---------- */
.page-about .about-team {
  display: grid;
  gap: 30px;
  margin-top: 40px;
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 34px;
  }
}

.page-about .about-team__col {
  padding-top: 18px;
  border-top: 1px solid var(--about-rule-paper);
}

.page-about .about-team__meter {
  block-size: 5px;
  margin-bottom: 18px;
  background: rgba(13, 23, 20, 0.1);
  overflow: hidden;
}

.page-about .about-team__fill {
  display: block;
  block-size: 100%;
  inline-size: var(--fill, 30%);
  background: linear-gradient(90deg, #0A1C17, var(--cyan));
}

.page-about .about-team__count {
  margin: 0;
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .about-team__count span {
  margin-left: 5px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #5C6E67;
}

.page-about .about-team__role {
  margin: 8px 0 12px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.page-about .about-team__col p:last-child {
  max-width: 40ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(13, 23, 20, 0.72);
}

/* ---------- 数据流程 ---------- */
.page-about .about-flow {
  display: grid;
  gap: 1px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(143, 168, 160, 0.28);
  border: 1px solid rgba(143, 168, 160, 0.28);
}

@media (min-width: 840px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-flow__step {
  position: relative;
  padding: 26px 22px 30px;
  background: var(--ink-800);
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  block-size: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(60, 232, 192, 0));
}

.page-about .about-flow__idx {
  display: block;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-flow__step h3 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-flow__step p {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mist);
}

.page-about .about-flow__figure {
  margin: 40px 0 0;
}

.page-about .about-flow__figure img {
  display: block;
  inline-size: 100%;
  block-size: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  border: 1px solid var(--line-cyan);
  background: var(--ink-800);
}

.page-about .about-flow__figure .ps-media__caption {
  margin-top: 10px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__strip {
  margin: 30px 0 22px;
}

.page-about .about-timeline__strip img {
  display: block;
  inline-size: 100%;
  block-size: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
  border: 1px solid var(--about-rule-paper);
  background: #E6EBE4;
}

.page-about .about-timeline {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  padding-bottom: 10px;
  border-top: 1px solid var(--about-rule-paper);
}

.page-about .about-timeline__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(252px, 76vw);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule-paper);
}

@media (min-width: 1120px) {
  .page-about .about-timeline__track {
    grid-auto-columns: minmax(0, 1fr);
  }
}

.page-about .about-stage {
  scroll-snap-align: start;
  padding: 26px 20px 28px;
  background: var(--paper);
}

.page-about .about-stage__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-rule-paper);
}

.page-about .about-stage__idx {
  font-size: 30px;
  line-height: 1;
  font-weight: 700;
  color: rgba(13, 23, 20, 0.28);
}

.page-about .about-stage__title {
  margin: 18px 0 12px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-about .about-stage__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(13, 23, 20, 0.74);
}

.page-about .about-stage__need {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  font-size: 13px;
  line-height: 1.7;
  color: #5C6E67;
}

/* ---------- 覆盖与协作 ---------- */
.page-about .about-reach {
  display: grid;
  gap: 1px;
  margin: 34px 0 26px;
  background: var(--about-rule);
  border-block: 1px solid var(--about-rule);
}

@media (min-width: 760px) {
  .page-about .about-reach {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-reach__item {
  padding: 20px 18px;
  background: rgba(16, 42, 34, 0.5);
}

.page-about .about-reach dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-reach dd {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .about-reach dd .ps-num {
  margin-right: 6px;
  font-size: 28px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 联系与行动 ---------- */
.page-about .about-contact {
  margin-top: 30px;
  padding: 22px 20px;
  border: 1px solid var(--line-cyan);
  background: rgba(16, 42, 34, 0.55);
}

.page-about .about-contact__line {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-about .about-contact__line a {
  color: var(--cyan);
  text-underline-offset: 3px;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-cta .ps-btn {
  text-decoration: none;
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-chapter__num,
  .page-about .about-team__fill {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --fill: currentColor;
}