.page-about {
  --about-pad: 20px;
  background: var(--void);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ── 共享微调 ── */
.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--cyan);
}

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

/* ── 首屏 ── */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 56px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(110% 85% at 84% -22%, var(--violet-wash), transparent 62%),
    radial-gradient(85% 65% at 4% 2%, var(--cyan-wash), transparent 58%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -6% 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.45;
  -webkit-mask-image: linear-gradient(to bottom, #000 8%, transparent 92%);
  mask-image: linear-gradient(to bottom, #000 8%, transparent 92%);
  pointer-events: none;
}

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

.page-about .about-crumbs {
  margin-bottom: 30px;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-kicker__mark {
  width: 18px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-hero__title em {
  font-style: normal;
  background: linear-gradient(96deg, var(--violet) 8%, var(--cyan) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lower {
  display: grid;
  gap: 32px;
  margin-top: 34px;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 36em;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

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

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--panel-deep);
}

.page-about .about-facts__num {
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .about-facts__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ── 分区通用 ── */
.page-about .about-sec {
  position: relative;
  padding: 60px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-sec__head {
  max-width: 42em;
  margin-bottom: 32px;
}

.page-about .about-sec__no {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.02em;
}

.page-about .about-sec__lead {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
  max-width: 34em;
}

/* ── 01 起点 ── */
.page-about .about-origin__body {
  display: grid;
  gap: 32px;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-origin__aside {
  align-self: start;
  padding: 22px 20px 8px;
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-deep) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: inset 3px 0 0 0 var(--violet);
}

.page-about .about-origin__aside-title {
  margin: 0 0 18px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-origin__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-origin__list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 0 0 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-origin__key {
  flex: none;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--void);
  background: var(--cyan);
  border-radius: var(--radius);
}

/* ── 02 团队 ── */
.page-about .about-crew__banner {
  position: relative;
  margin: 0 0 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-crew__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.page-about .about-crew__banner-cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: rgba(7, 11, 24, 0.78);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

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

.page-about .about-crew__card {
  position: relative;
  padding: 24px 20px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-crew__card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 28px;
  height: 3px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-about .about-crew__card:hover,
.page-about .about-crew__card:focus-within {
  transform: translateY(-2px);
  border-color: var(--cyan);
  box-shadow: 0 12px 28px rgba(4, 8, 20, 0.55);
}

.page-about .about-crew__count {
  margin: 8px 0 6px;
  font-family: var(--font-data);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
}

.page-about .about-crew__name {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-crew__desc {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-crew__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--amber);
}

/* ── 03 流程 ── */
.page-about .about-flow__layout {
  display: grid;
  gap: 30px;
}

.page-about .about-flow__step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-deep);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-flow__step + .about-flow__step {
  margin-top: 10px;
}

.page-about .about-flow__step:hover {
  border-color: var(--cyan);
}

.page-about .about-flow__step summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .about-flow__no {
  flex: none;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  color: var(--void);
  background: var(--amber);
  padding: 3px 6px;
  border-radius: var(--radius);
}

.page-about .about-flow__name {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .about-flow__chev {
  flex: none;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-flow__step[open] .about-flow__chev {
  transform: rotate(-135deg);
}

.page-about .about-flow__body {
  padding: 0 18px 18px;
}

.page-about .about-flow__body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flow__check {
  margin: 0;
  padding: 12px 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
}

.page-about .about-flow__check li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-flow__check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-flow__figure {
  margin: 0;
  align-self: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-flow__figure figcaption {
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ── 04 时间轴 ── */
.page-about .about-timeline {
  --tl-pad: 44px;
  position: relative;
  padding-left: var(--tl-pad);
}

.page-about .about-timeline__rail {
  position: absolute;
  left: 0;
  top: 6px;
  width: 20px;
  height: calc(100% - 40px);
  display: block;
}

.page-about .about-timeline__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 34px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__node {
  position: absolute;
  top: 7px;
  left: calc(-1 * var(--tl-pad) + 5px);
  width: 10px;
  height: 10px;
  box-sizing: border-box;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--void);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__node {
  transform: scale(1.7);
  border-color: var(--violet);
  box-shadow: 0 0 0 5px var(--violet-wash);
}

.page-about .about-timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-timeline__h {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 32em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ── 05 栏目 ── */
.page-about .about-matrix__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-matrix__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-matrix__row:hover {
  background: rgba(43, 232, 224, 0.04);
}

.page-about .about-matrix__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-matrix__desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-matrix__cadence {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-matrix__row--stable {
  background: linear-gradient(90deg, rgba(123, 77, 255, 0.12), transparent 70%);
}

.page-about .about-matrix__foot {
  margin: 26px 0 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ── 06 合作 ── */
.page-about .about-partner__layout {
  display: grid;
  gap: 30px;
}

.page-about .about-partner__text p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-partner__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partner__stat {
  padding: 16px 12px;
  background: var(--panel-deep);
}

.page-about .about-partner__stat dt {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-about .about-partner__stat dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
}

.page-about .about-partner__cta {
  margin-bottom: 0;
}

.page-about .about-partner__figure {
  margin: 0;
  align-self: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-partner__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-partner__figure figcaption {
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew__card,
  .page-about .about-timeline__node,
  .page-about .about-flow__chev,
  .page-about .about-matrix__row,
  .page-about .about-inline-link {
    transition: none;
  }

  .page-about .about-crew__card:hover,
  .page-about .about-crew__card:focus-within {
    transform: none;
  }

  .page-about .about-timeline__item:hover .about-timeline__node {
    transform: none;
  }
}

/* ── 断点：中等屏 ── */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-matrix__row {
    grid-template-columns: 130px minmax(0, 1fr) 120px;
    align-items: baseline;
    gap: 20px;
    padding: 20px 8px;
  }

  .page-about .about-matrix__cadence {
    text-align: right;
  }
}

/* ── 断点：桌面 ── */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 36px 0 72px;
  }

  .page-about .about-hero__lower {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: end;
    gap: 48px;
    margin-top: 44px;
  }

  .page-about .about-sec {
    padding: 84px 0;
  }

  .page-about .about-sec__head {
    margin-bottom: 44px;
  }

  .page-about .about-origin__body {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
    gap: 56px;
  }

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

  .page-about .about-crew__card:nth-child(1) {
    margin-top: 0;
  }

  .page-about .about-crew__card:nth-child(2) {
    margin-top: 38px;
  }

  .page-about .about-crew__card:nth-child(3) {
    margin-top: 14px;
  }

  .page-about .about-flow__layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-timeline {
    --tl-pad: 120px;
  }

  .page-about .about-timeline__item {
    padding-bottom: 44px;
  }

  .page-about .about-timeline__item:nth-child(even) {
    padding-left: 96px;
  }

  .page-about .about-timeline__h {
    font-size: 20px;
  }

  .page-about .about-timeline__year {
    font-size: 14px;
  }

  .page-about .about-partner__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__lead {
    font-size: 18px;
  }

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

  .page-about .about-crew__desc,
  .page-about .about-partner__text p {
    font-size: 15px;
  }

  .page-about .about-timeline__body p {
    font-size: 15px;
  }
}
<<<END>>>