.page-about {
  background: var(--void);
  color: var(--stardust);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: var(--sp-3);
  padding-bottom: var(--sp-2);
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--sp-4) 0 var(--sp-7);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero__orbit {
  position: absolute;
  top: -18%;
  right: -30%;
  width: min(620px, 150vw);
  height: auto;
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  gap: var(--sp-5);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.5rem, 9vw, 5.5rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--stardust);
}

.page-about .about-hero__lead {
  max-width: 34em;
  margin: var(--sp-3) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: var(--sp-4) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__meta li {
  background: var(--void);
  padding: 12px 14px;
}

.page-about .about-hero__meta b {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .about-hero__meta span {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
}

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

.page-about .about-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--void);
  background: var(--cyan);
}

/* ---------- 通用章节头 ---------- */
.page-about .sec-head {
  display: grid;
  gap: 10px;
  max-width: 46em;
  margin-bottom: var(--sp-6);
}

.page-about .sec-head h2,
.page-about .about-origin__body h2,
.page-about .about-team__copy h2,
.page-about .about-partners__copy h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 4.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--stardust);
}

.page-about .sec-head__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  padding-top: var(--sp-7);
  padding-bottom: var(--sp-7);
}

.page-about .about-origin__inner {
  display: grid;
  gap: var(--sp-3);
}

.page-about .about-origin__body p {
  max-width: 36em;
  margin: var(--sp-2) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-quote {
  margin: var(--sp-5) 0 0;
  padding: var(--sp-3) var(--sp-4);
  background: var(--nebula);
  border-left: 2px solid var(--cyan);
}

.page-about .about-quote p {
  margin: 0;
  max-width: 24em;
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 3.2vw, 1.4rem);
  line-height: 1.6;
  color: var(--stardust);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, rgba(36, 22, 82, 0.55), rgba(7, 14, 34, 0));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .timeline {
  display: grid;
  gap: var(--sp-4);
}

.page-about .stage-rail {
  overflow-x: auto;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}

.page-about .stage-rail__list {
  display: flex;
  gap: var(--sp-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .stage-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 2px;
  text-decoration: none;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.page-about .stage-rail__dot {
  width: 8px;
  height: 8px;
  background: var(--line);
  transition: background 0.18s var(--ease), transform 0.25s var(--ease);
}

.page-about .stage-rail__num {
  font-size: 14px;
  letter-spacing: 0.06em;
}

.page-about .stage-rail__link:hover,
.page-about .stage-rail__link:focus-visible {
  color: var(--stardust);
}

.page-about .stage-rail__link:hover .stage-rail__dot,
.page-about .stage-rail__link:focus-visible .stage-rail__dot {
  background: var(--pulse);
  transform: rotate(45deg);
}

.page-about .stage-rail__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .stage {
  position: relative;
  padding: var(--sp-4) 0 var(--sp-4) var(--sp-4);
  border-top: 1px solid var(--line);
}

.page-about .stage:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .stage::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--sp-4) + 5px);
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

.page-about .stage:first-child::before {
  top: 5px;
}

.page-about .stage__year {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .stage__title {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-size: clamp(1.2rem, 3.4vw, 1.55rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--stardust);
}

.page-about .stage__text {
  max-width: 36em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 03 流程 ---------- */
.page-about .about-process {
  position: relative;
  padding-top: var(--sp-7);
  padding-bottom: var(--sp-7);
  background: var(--nebula);
  overflow: hidden;
}

.page-about .about-process__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-about .about-process .shell {
  position: relative;
  z-index: 1;
}

.page-about .process {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background-color: var(--line);
  background-image: repeating-linear-gradient(135deg, rgba(53, 240, 208, 0.14) 0 1px, transparent 1px 26px);
  border: 1px solid var(--line);
}

.page-about .process__step {
  position: relative;
  padding: var(--sp-3);
  background: rgba(7, 14, 34, 0.9);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .process__step:hover,
.page-about .process__step:focus {
  background: var(--card);
  outline: none;
}

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

.page-about .process__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--cyan);
  transition: color 0.2s var(--ease);
}

.page-about .process__step:hover .process__num,
.page-about .process__step:focus .process__num {
  color: var(--pulse);
}

.page-about .process__name {
  margin: 14px 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  line-height: 1.3;
  color: var(--stardust);
}

.page-about .process__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .process__meta {
  display: grid;
  gap: 6px;
  margin: var(--sp-3) 0 0;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--line);
}

.page-about .process__meta div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: baseline;
}

.page-about .process__meta dt {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(157, 171, 201, 0.85);
}

.page-about .process__meta dd {
  margin: 0;
  font-size: 13px;
  color: var(--stardust);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  padding-top: var(--sp-7);
  padding-bottom: var(--sp-7);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--sp-5);
}

.page-about .about-team__copy p {
  max-width: 36em;
  margin: var(--sp-2) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-team__chart {
  margin-top: var(--sp-4);
}

.page-about .about-team__bar {
  display: flex;
  height: 26px;
  border: 1px solid var(--line);
  background: var(--card);
}

.page-about .about-team__seg {
  display: block;
  height: 100%;
}

.page-about .about-team__seg--a {
  width: 55.1%;
  background: var(--cyan);
}

.page-about .about-team__seg--b {
  width: 44.9%;
  background: var(--pulse);
}

.page-about .about-team__legend {
  display: grid;
  gap: 8px;
  margin: var(--sp-2) 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-team__legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-team__legend b {
  color: var(--stardust);
  font-size: 15px;
}

.page-about .about-team__swatch {
  width: 10px;
  height: 10px;
  flex: none;
}

.page-about .about-team__swatch--a {
  background: var(--cyan);
}

.page-about .about-team__swatch--b {
  background: var(--pulse);
}

.page-about .about-team__aside {
  padding: var(--sp-3);
  border: 1px solid var(--line);
  background: var(--card);
}

.page-about .about-team__aside-title {
  margin: 0 0 var(--sp-3);
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-team__flow {
  display: grid;
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__flow li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 10px;
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-team__flow li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-team__flow .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
  padding-top: 3px;
}

/* ---------- 05 伙伴 ---------- */
.page-about .about-partners {
  padding-top: var(--sp-7);
  padding-bottom: var(--sp-7);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(36, 22, 82, 0.5), rgba(7, 14, 34, 0));
}

.page-about .about-partners__grid {
  display: grid;
  gap: var(--sp-5);
}

.page-about .about-partners__copy > p {
  max-width: 36em;
  margin: var(--sp-2) 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--sp-4);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .partner-card {
  padding: var(--sp-3);
  background: var(--void);
}

.page-about .partner-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .partner-card__label {
  margin: 8px 0 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--stardust);
}

.page-about .partner-card__text {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-partners__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
}

/* ---------- 06 里程碑 ---------- */
.page-about .about-milestones {
  padding-top: var(--sp-7);
  padding-bottom: var(--sp-7);
  border-top: 1px solid var(--line);
}

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

.page-about .milestone {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: var(--sp-2);
  align-items: start;
  padding: var(--sp-3);
  background: var(--void);
  transition: background 0.18s var(--ease);
}

.page-about .milestone:hover {
  background: var(--card);
}

.page-about .milestone__year {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--amber);
  padding-top: 2px;
}

.page-about .milestone__text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 07 收束 ---------- */
.page-about .about-closing {
  padding: var(--sp-7) 0 var(--sp-8);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(7, 14, 34, 0.2), var(--nebula));
}

.page-about .about-closing__lines {
  display: grid;
  gap: var(--sp-3);
  margin: var(--sp-3) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-closing__lines li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: var(--sp-2);
  align-items: baseline;
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--line);
}

.page-about .about-closing__lines b {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-closing__lines span {
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 3.2vw, 1.5rem);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--stardust);
}

.page-about .about-closing__note {
  max-width: 34em;
  margin: var(--sp-4) 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--sp-4);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .milestone {
    grid-template-columns: 110px minmax(0, 1fr);
    padding: var(--sp-3) var(--sp-4);
  }
}

@media (min-width: 820px) {
  .page-about .process {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .process__step {
    padding: var(--sp-3) var(--sp-3) var(--sp-4);
  }

  .page-about .about-closing__lines li {
    grid-template-columns: 48px minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: var(--sp-5);
    padding-bottom: var(--sp-8);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: var(--sp-6);
  }

  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--sp-5);
  }

  .page-about .about-origin__label {
    position: sticky;
    top: 120px;
    align-self: start;
  }

  .page-about .timeline {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: var(--sp-6);
  }

  .page-about .stage-rail {
    position: sticky;
    top: 104px;
    align-self: start;
    overflow: visible;
    border-top: 0;
    border-bottom: 0;
    padding: 4px 0;
  }

  .page-about .stage-rail__list {
    flex-direction: column;
    gap: 14px;
    padding-left: 14px;
    border-left: 1px solid var(--line);
  }

  .page-about .stage {
    padding: var(--sp-5) 0 var(--sp-5) var(--sp-4);
  }

  .page-about .stage:first-child {
    padding-top: 0;
  }

  .page-about .stage::before {
    top: calc(var(--sp-5) + 6px);
  }

  .page-about .stage:first-child::before {
    top: 6px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--sp-6);
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--sp-6);
    align-items: start;
  }

  .page-about .about-partners__figure {
    position: sticky;
    top: 120px;
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .process__step,
  .page-about .process__num,
  .page-about .milestone,
  .page-about .stage-rail__dot,
  .page-about .stage-rail__link {
    transition: none;
  }
}
<<<END>>>