.page-about {
  background: var(--mist);
  color: var(--ink);
}

/* 首屏：错位色块 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 32px) 0 44px;
  background:
    linear-gradient(150deg, rgba(127, 183, 201, .30) 0%, rgba(245, 246, 242, 0) 54%),
    var(--mist);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: 70%;
  height: 150%;
  background: linear-gradient(155deg, rgba(14, 90, 74, .20), rgba(127, 183, 201, .06) 62%, rgba(245, 246, 242, 0));
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border-radius: 46% 54% 58% 42% / 52% 44% 56% 48%;
  background: radial-gradient(circle at 45% 45%, rgba(200, 16, 46, .20), rgba(200, 16, 46, 0) 70%);
  pointer-events: none;
}

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

.page-about .about-hero .eyebrow {
  margin: 14px 0 0;
  color: var(--maple);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  max-width: 22em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 6.2vw, 46px);
  line-height: 1.26;
  letter-spacing: -.012em;
  color: var(--ink);
}

.page-about .about-hero-lede {
  margin: 18px 0 0;
  max-width: 62ch;
  padding: 14px 16px;
  border-left: 3px solid var(--fir);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(255, 255, 255, .68);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 13px 15px;
  background: var(--frost);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--maple);
}

.page-about .about-stat:nth-child(2) .about-stat-num { color: var(--fir); }
.page-about .about-stat:nth-child(3) .about-stat-num { color: var(--indigo); }
.page-about .about-stat:nth-child(4) .about-stat-num { color: var(--maple-deep); }

.page-about .about-stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--moss);
}

/* 主体骨架：索引栏 + 面板流 */
.page-about .about-shell {
  display: grid;
  gap: 22px;
  padding-bottom: clamp(40px, 7vw, 84px);
}

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

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-about .about-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail-list > li { flex: 0 0 auto; }

.page-about .about-rail-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--frost);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-rail-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--maple);
}

.page-about .about-rail-label { white-space: nowrap; }

.page-about .about-rail-year {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--moss);
  white-space: nowrap;
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  border-color: var(--maple);
  background: var(--frost);
  transform: translateY(-1px);
}

.page-about .about-flow {
  display: grid;
  gap: 20px;
  min-width: 0;
}

/* 堆叠面板 */
.page-about .about-panel {
  position: relative;
  min-width: 0;
  padding: clamp(20px, 3.2vw, 38px);
  background: var(--frost);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.page-about .about-panel--tint {
  background: linear-gradient(155deg, rgba(127, 183, 201, .26), rgba(255, 255, 255, .95) 58%);
  border-color: rgba(127, 183, 201, .45);
}

.page-about .about-panel--indigo {
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(127, 183, 201, .30), rgba(31, 58, 95, 0) 62%),
    var(--indigo);
  border-color: rgba(255, 255, 255, .16);
  color: rgba(255, 255, 255, .86);
}

.page-about .about-panel--wine {
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(217, 164, 65, .26), rgba(122, 31, 43, 0) 62%),
    var(--wine);
  border-color: rgba(255, 255, 255, .14);
  color: rgba(255, 255, 255, .86);
}

.page-about .about-panel-grid {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-about .about-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-mark-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--maple);
}

.page-about .about-mark-year {
  font-family: var(--font-mono);
  font-size: clamp(20px, 4.2vw, 28px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.2;
  color: var(--moss);
}

.page-about .about-panel--indigo .about-mark-no,
.page-about .about-panel--wine .about-mark-no { color: var(--sand); }

.page-about .about-panel--indigo .about-mark-year,
.page-about .about-panel--wine .about-mark-year { color: rgba(255, 255, 255, .58); }

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

.page-about .about-body .section-title {
  margin: 0 0 10px;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.32;
  color: var(--ink);
}

.page-about .about-body .lede {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-panel--indigo .about-body .section-title,
.page-about .about-panel--wine .about-body .section-title { color: var(--frost); }

.page-about .about-panel--indigo .about-body .lede,
.page-about .about-panel--indigo .about-body p,
.page-about .about-panel--wine .about-body .lede,
.page-about .about-panel--wine .about-body p { color: rgba(255, 255, 255, .84); }

/* 要点列表 */
.page-about .about-points {
  display: grid;
  gap: 8px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--maple);
  transform: rotate(45deg);
}

/* 分层索引图 */
.page-about .about-layers {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, .78);
  border: 1px solid var(--line);
  border-left: 4px solid var(--fir);
  border-radius: var(--radius-sm);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-layer:nth-child(2) {
  border-left-color: var(--ice);
  margin-left: 12px;
}

.page-about .about-layer:nth-child(3) {
  border-left-color: var(--sand);
  margin-left: 24px;
}

.page-about .about-layer:hover,
.page-about .about-layer:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-layer-no {
  align-self: start;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(14, 90, 74, .10);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--fir);
}

.page-about .about-layer strong {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-layer p {
  grid-column: 1 / -1;
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--moss);
}

/* 维护节奏 */
.page-about .about-cadence {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cadence-item {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(245, 246, 242, .92);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.page-about .about-cadence-freq {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--maple);
}

.page-about .about-cadence-title {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-cadence-text {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--moss);
}

/* 图与说明 */
.page-about .about-figure {
  margin: 20px 0 0;
}

.page-about .about-figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, rgba(127, 183, 201, .22), rgba(14, 90, 74, .10));
}

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

.page-about .about-caption {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--moss);
}

/* 版本与体验 */
.page-about .about-split {
  display: grid;
  gap: 20px;
  margin: 18px 0 0;
}

.page-about .about-stages {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stage {
  padding-left: 16px;
  border-left: 2px solid rgba(255, 255, 255, .28);
}

.page-about .about-stage-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--sand);
}

.page-about .about-stage-title {
  margin: 4px 0 0;
  font-size: 16px;
  line-height: 1.6;
  color: var(--frost);
}

.page-about .about-stage-text {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(255, 255, 255, .78);
}

.page-about .about-phone-frame {
  overflow: hidden;
  max-width: 300px;
  margin: 0 auto;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: var(--radius-lg);
}

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

.page-about .about-inline {
  margin: 18px 0 0;
}

.page-about .about-link {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: var(--sand);
}

.page-about .about-panel--indigo .about-link:hover,
.page-about .about-panel--wine .about-link:hover { color: var(--frost); }

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
}

.page-about .about-team-card {
  padding: 16px 18px;
  background: var(--frost);
  border: 1px solid var(--line);
  border-top: 3px solid var(--fir);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-team-card:nth-child(2) { border-top-color: var(--maple); }
.page-about .about-team-card:nth-child(3) { border-top-color: var(--ice); }
.page-about .about-team-card:nth-child(4) { border-top-color: var(--sand); }

.page-about .about-team-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-team-name {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-team-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--moss);
}

/* 合作与场景 */
.page-about .about-scenes {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
}

.page-about .about-scene {
  padding: 16px;
  background: rgba(255, 255, 255, .10);
  border: 1px solid rgba(255, 255, 255, .20);
  border-radius: var(--radius-md);
}

.page-about .about-scene-title {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--frost);
}

.page-about .about-scene-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(255, 255, 255, .82);
}

/* 结尾入口 */
.page-about .about-cta {
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(217, 164, 65, .24), rgba(7, 59, 48, 0) 58%),
    var(--fir-deep);
  border-color: rgba(255, 255, 255, .16);
  color: rgba(255, 255, 255, .86);
}

.page-about .about-cta h2 {
  margin: 0 0 8px;
  font-size: clamp(20px, 3.2vw, 26px);
  line-height: 1.35;
  color: var(--frost);
}

.page-about .about-cta p {
  margin: 0 0 18px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .80);
}

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

.page-about .about-cta .btn-ghost {
  color: var(--frost);
  border-color: rgba(255, 255, 255, .42);
}

.page-about .about-cta .btn-ghost:hover {
  border-color: var(--sand);
  color: var(--sand);
}

/* 窄屏保护 */
@media (max-width: 480px) {
  .page-about .about-layer:nth-child(2) { margin-left: 8px; }
  .page-about .about-layer:nth-child(3) { margin-left: 16px; }
}

@media (min-width: 640px) {
  .page-about .about-cadence-item {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 4px 18px;
    align-items: start;
  }
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-layer:nth-child(2) { margin-left: 20px; }
  .page-about .about-layer:nth-child(3) { margin-left: 40px; }

  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 780px) {
  .page-about .about-panel-grid {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .about-mark {
    flex-direction: column;
    gap: 6px;
  }
}

@media (min-width: 860px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    gap: 28px;
  }

  .page-about .about-phone-frame { margin: 0; }
}

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-rail-list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--line);
  }

  .page-about .about-rail-list > li + li { margin-top: 2px; }

  .page-about .about-rail-link {
    width: 100%;
    padding: 9px 10px 9px 14px;
    border-color: transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: transparent;
  }

  .page-about .about-rail-year { margin-left: auto; }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link:focus-visible {
    background: var(--frost);
    transform: translateX(2px);
  }

  .page-about .about-hero { padding-top: calc(var(--header-h) + 48px); }
}

@media (min-width: 1100px) {
  .page-about .about-panel-grid {
    grid-template-columns: 124px minmax(0, 1fr);
    gap: 34px;
  }
}
<<<END>>>