.page-about {
  background: var(--ink-900);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .panel {
  padding-block: clamp(2.25rem, 6vw, 4.5rem);
}

.page-about .intro {
  padding-block: 0 clamp(2.25rem, 6vw, 4rem);
}

/* ---------- 首屏档案区 ---------- */
.page-about .intro .breadcrumbs {
  padding-top: 1.25rem;
  color: var(--stone);
  font-size: .82rem;
}

.page-about .intro .breadcrumbs a {
  color: var(--cyan-soft);
  text-decoration: none;
}

.page-about .intro .breadcrumbs a:hover,
.page-about .intro .breadcrumbs a:focus-visible {
  color: var(--orange-soft);
  text-decoration: underline;
}

.page-about .intro__grid {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.5rem;
}

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

.page-about .intro__kicker {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .intro__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 5.4vw, 3.35rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.page-about .intro__lede {
  margin: 1.1rem 0 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--sand);
}

.page-about .intro__facts {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(122, 219, 221, .22);
  border: 1px solid rgba(122, 219, 221, .22);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .intro__fact {
  background: var(--ink);
  padding: .9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .2rem;
}

.page-about .intro__num {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: -.01em;
}

.page-about .intro__key {
  font-size: .8rem;
  color: var(--stone);
  letter-spacing: .04em;
}

.page-about .intro__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-2);
  background: var(--ink-mid);
}

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

.page-about .intro__media .media__caption {
  padding: .6rem .85rem;
  background: var(--ink-mid);
  color: var(--cyan-soft);
}

/* ---------- 历程时间线 ---------- */
.page-about .eras .label-band__tag {
  background: var(--cyan);
  color: var(--ink-900);
}

.page-about .eras__count {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--stone);
  margin-left: auto;
  align-self: center;
}

.page-about .filter-bar {
  margin: 1.25rem 0 2rem;
}

.page-about .eras__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .eras__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .4rem;
  bottom: .4rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--orange-soft) 70%, var(--clay));
  opacity: .45;
}

.page-about .era {
  position: relative;
  padding: 0 0 1.5rem 2.25rem;
  min-width: 0;
}

.page-about .era::before {
  content: "";
  position: absolute;
  left: 0;
  top: .35rem;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ivory);
  border: 3px solid var(--cyan);
  box-sizing: border-box;
}

.page-about .era__scale {
  margin-bottom: .35rem;
}

.page-about .era__year {
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: .04em;
}

.page-about .era__body {
  position: relative;
  background: var(--sand);
  border-top: 3px solid var(--cyan);
  border-radius: var(--r-md);
  padding: 1rem 1.1rem 1.15rem;
  box-shadow: 0 2px 0 rgba(15, 42, 68, .05);
}

.page-about .era__body--clay {
  border-top-color: var(--clay);
}

.page-about .era__body--moss {
  border-top-color: var(--moss);
}

.page-about .era__chip {
  display: inline-block;
  margin-bottom: .5rem;
  padding: .15rem .5rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink);
  background: rgba(251, 247, 239, .62);
  border: 1px solid rgba(40, 194, 198, .55);
  border-radius: var(--r-xs);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.page-about .era__chip--clay {
  border-color: rgba(184, 107, 75, .6);
}

.page-about .era__chip--moss {
  border-color: rgba(91, 127, 106, .6);
}

.page-about .era__title {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .era__body p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--ink-mid);
}

/* ---------- 团队 ---------- */
.page-about .crew {
  background: var(--sand);
}

.page-about .label-band__tag--clay {
  background: var(--clay);
  color: var(--ivory);
}

.page-about .label-band__tag--orange {
  background: var(--orange);
  color: var(--ivory);
}

.page-about .crew__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .crew__list {
  display: grid;
  gap: .75rem;
  min-width: 0;
}

.page-about .crew__item {
  background: var(--ivory);
  border-left: 4px solid var(--cyan);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .crew__item:nth-child(2) {
  border-left-color: var(--clay);
}

.page-about .crew__item:nth-child(3) {
  border-left-color: var(--moss);
}

.page-about .crew__item:nth-child(4) {
  border-left-color: var(--orange);
}

.page-about .crew__summary {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: .85rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .crew__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--stone);
}

.page-about .crew__item[open] .crew__summary::after {
  content: "–";
  color: var(--orange);
}

.page-about .crew__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  min-width: 1.6ch;
}

.page-about .crew__role {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -.01em;
}

.page-about .crew__body {
  margin: 0;
  padding: 0 1rem 1rem;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--ink-mid);
}

.page-about .crew__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  align-self: start;
}

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

.page-about .crew__media .media__caption {
  padding: .55rem .8rem;
  background: var(--ink);
  color: var(--cyan-soft);
}

/* ---------- 运转流程（深色面板） ---------- */
.page-about .flow {
  color: var(--ivory);
}

.page-about .flow .label-band__tag {
  background: var(--orange);
  color: var(--ivory);
}

.page-about .flow .label-band__count {
  color: var(--cyan-soft);
  font-family: var(--font-mono);
  font-size: .75rem;
}

.page-about .flow .section-title {
  color: var(--ivory);
}

.page-about .flow .section-lede {
  color: var(--sand);
}

.page-about .flow__steps {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-about .flow__step {
  background: rgba(251, 247, 239, .06);
  border: 1px solid rgba(122, 219, 221, .28);
  border-radius: var(--r-md);
  padding: 1rem 1.05rem 1.1rem;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.page-about .flow__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: .35rem;
}

.page-about .flow__name {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--ivory);
  letter-spacing: .02em;
}

.page-about .flow__step p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--sand);
}

.page-about .flow__cadence {
  display: grid;
  gap: .7rem;
  margin-top: 1.5rem;
}

.page-about .cadence {
  border-left: 3px solid var(--orange);
  padding: .1rem 0 .1rem .85rem;
}

.page-about .cadence__key {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--orange-soft);
  margin-bottom: .25rem;
}

.page-about .cadence__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--ivory);
}

.page-about .flow__link {
  margin: 1.5rem 0 0;
  font-size: .9rem;
  color: var(--stone);
}

.page-about .flow__link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 194, 198, .5);
}

.page-about .flow__link a:hover,
.page-about .flow__link a:focus-visible {
  color: var(--orange-soft);
  border-bottom-color: var(--orange-soft);
}

/* ---------- 版本档案卡 ---------- */
.page-about .ver__grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .ver__stack {
  display: grid;
  gap: .8rem;
  min-width: 0;
}

.page-about .ver {
  position: relative;
  background: var(--sand);
  border: 1px solid rgba(15, 42, 68, .08);
  border-radius: var(--r-md);
  padding: .95rem 1.05rem 1rem;
  transition: transform .2s ease, box-shadow .2s ease;
}

.page-about .ver__no {
  margin: 0 0 .3rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--clay);
}

.page-about .ver__title {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -.01em;
}

.page-about .ver__note {
  margin: 0;
  font-size: .89rem;
  line-height: 1.7;
  color: var(--ink-mid);
}

.page-about .ver--current {
  background: var(--ink);
  border-color: var(--ink);
  padding-right: 4.5rem;
}

.page-about .ver--current .ver__no {
  color: var(--orange-soft);
}

.page-about .ver--current .ver__title {
  color: var(--ivory);
}

.page-about .ver--current .ver__note {
  color: var(--sand);
}

.page-about .ver--current .version-badge {
  top: .8rem;
  right: .8rem;
}

.page-about .ver__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  align-self: start;
}

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

.page-about .ver__media .media__caption {
  padding: .55rem .8rem;
  background: var(--ink);
  color: var(--cyan-soft);
}

/* ---------- 合作与认可 ---------- */
.page-about .partners__grid {
  display: grid;
  gap: .9rem;
  margin-top: 1.5rem;
}

.page-about .pcard {
  background: var(--ivory);
  border-radius: var(--r-md);
  padding: 1.1rem 1.15rem;
  border-bottom: 3px solid var(--moss);
}

.page-about .pcard:nth-child(2) {
  border-bottom-color: var(--cyan);
}

.page-about .pcard:nth-child(3) {
  border-bottom-color: var(--orange);
}

.page-about .pcard__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  letter-spacing: -.02em;
}

.page-about .pcard__num small {
  font-size: .95rem;
  color: var(--stone);
  margin-left: .15rem;
}

.page-about .pcard__label {
  margin: .5rem 0 0;
  font-size: .88rem;
  line-height: 1.65;
  color: var(--ink-mid);
}

.page-about .partners__text {
  margin: 1.5rem 0 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-mid);
}

.page-about .partners__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.25rem;
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  transition: opacity .24s ease, transform .24s ease;
}

.page-about .ver:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-1);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .ver {
    transition: none;
  }

  .page-about .ver:hover {
    transform: none;
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .intro__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .flow__cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

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

@media (min-width: 900px) {
  .page-about .intro__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
    gap: 2.5rem;
  }

  .page-about .crew__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 2rem;
  }

  .page-about .ver__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 2rem;
  }
}

@media (min-width: 860px) {
  .page-about .eras__list::before {
    left: 5.5rem;
  }

  .page-about .era {
    display: grid;
    grid-template-columns: 5.5rem minmax(0, 1fr);
    gap: 2rem;
    padding: 0 0 1.75rem 0;
  }

  .page-about .era::before {
    left: calc(5.5rem - 7px);
    top: .45rem;
  }

  .page-about .era__scale {
    text-align: right;
    margin-bottom: 0;
    padding-top: .15rem;
  }

  .page-about .era__year {
    font-size: 1.05rem;
  }
}

@media (min-width: 1040px) {
  .page-about .flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>