.page-about {
  --about-rail-w: 190px;
  --about-rule: rgba(30, 64, 52, 0.95);
  --about-chip: rgba(53, 242, 208, 0.08);
  background: var(--ink-black);
  color: var(--body-dim);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.75;
}

.page-about a:focus-visible {
  outline: 2px solid var(--neon-cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 26px;
  padding-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--crease);
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--neon-cyan);
}

.page-about .breadcrumbs li[aria-current="page"] {
  color: var(--chalk);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 28px 0 8px;
  background:
    radial-gradient(760px 420px at 82% 6%, rgba(53, 242, 208, 0.12), transparent 64%),
    linear-gradient(180deg, var(--ink-black) 0%, var(--deep-green) 100%);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  padding-bottom: 36px;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--chalk);
}

.page-about .about-hero__lead {
  margin: 0 0 26px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--body-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-btn {
  display: inline-block;
  padding: 11px 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-btn--solid {
  background: var(--neon-cyan);
  color: var(--on-paper);
  font-weight: 700;
}

.page-about .about-btn--solid:hover {
  transform: translateY(-2px);
  background: var(--signal);
  color: var(--on-paper);
}

.page-about .about-btn--ghost {
  border-color: var(--crease);
  color: var(--chalk);
}

.page-about .about-btn--ghost:hover {
  transform: translateY(-2px);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
  background: var(--about-chip);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--crease);
  background: var(--pitch-green);
  padding: 10px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-hero__figure figcaption,
.page-about .about-banner figcaption,
.page-about .about-split__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 4px 20px;
  background: var(--ink-black);
}

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--warm-orange);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 档案阅读外壳 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: 8px;
}

.page-about .about-rail {
  padding: 22px 0 10px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-about .about-rail__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 6px 14px;
  border: 1px solid var(--about-rule);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail__num {
  font-weight: 700;
  color: var(--neon-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-rail__item:hover {
  color: var(--chalk);
  border-color: var(--neon-cyan);
  background: var(--about-chip);
}

.page-about .about-flow {
  display: block;
  min-width: 0;
}

/* ---------- 区块骨架 ---------- */
.page-about .about-block {
  padding: 44px 0 8px;
  scroll-margin-top: 104px;
}

.page-about .about-block + .about-block {
  margin-top: 36px;
  border-top: 1px dashed var(--about-rule);
}

.page-about .about-block__head {
  max-width: 46em;
  margin-bottom: 26px;
}

.page-about .about-block__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-block__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-dim);
}

/* ---------- 时间线图形 ---------- */
.page-about .about-banner {
  margin: 0 0 26px;
  border: 1px solid var(--crease);
  background: var(--deep-green);
  padding: 8px;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

/* ---------- 年份卡片 ---------- */
.page-about .about-eras {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-era {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 20px 22px 24px;
  background: linear-gradient(160deg, var(--pitch-green) 0%, var(--deep-green) 100%);
  border: 1px solid var(--crease);
  border-left: 3px solid var(--crease);
  border-radius: var(--radius);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.3);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-era::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 12px;
  height: 12px;
  border-top: 1px solid var(--neon-cyan);
  border-right: 1px solid var(--neon-cyan);
  opacity: 0.55;
}

.page-about .about-era:hover {
  transform: translateY(-3px);
  border-left-color: var(--neon-cyan);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.45);
}

.page-about .about-era:focus-within {
  border-left-color: var(--signal);
}

.page-about .about-era__year {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 8vw, 54px);
  line-height: 1;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  color: var(--neon-cyan);
}

.page-about .about-era__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-era__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
}

.page-about .about-era__note {
  margin-top: 10px !important;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 13px !important;
  color: var(--mist);
}

.page-about .about-era__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--warm-orange);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-era__link::after {
  content: " →";
}

.page-about .about-era__link:hover {
  color: var(--chalk);
  border-bottom-color: var(--warm-orange);
}

/* ---------- 归档区 ---------- */
.page-about .about-zones {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-zone {
  padding: 16px 18px 20px;
  background: rgba(20, 48, 38, 0.72);
  border: 1px solid var(--crease);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-zone:hover {
  transform: translateY(-2px);
  background: var(--pitch-green);
}

.page-about .about-zone__code {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  background: var(--warm-orange);
  color: var(--on-paper);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-about .about-zone__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-zone p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--body-dim);
}

/* ---------- 编辑部 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-roles {
  display: grid;
  gap: 20px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--about-rule);
}

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

.page-about .about-role__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--neon-cyan);
}

.page-about .about-role__text h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--chalk);
}

.page-about .about-role__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
}

.page-about .about-split__note {
  margin: 22px 0 0;
  padding: 16px 18px;
  background: var(--deep-green);
  border-left: 3px solid var(--neon-cyan);
  font-size: 14px;
  line-height: 1.78;
  color: var(--body-dim);
}

.page-about .about-split__figure {
  margin: 0;
  padding: 10px;
  background: var(--pitch-green);
  border: 1px solid var(--crease);
}

.page-about .about-split__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

/* ---------- 更新节拍 ---------- */
.page-about .about-beats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: beat;
}

.page-about .about-beat {
  position: relative;
  padding: 20px 20px 22px 24px;
  background: rgba(14, 36, 28, 0.9);
  border: 1px solid var(--crease);
  border-left: 3px solid var(--mist);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-beat:hover {
  transform: translateY(-2px);
  border-left-color: var(--neon-cyan);
}

.page-about .about-beat--now {
  border-left-color: var(--signal);
}

.page-about .about-beat__when {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  background: rgba(53, 242, 208, 0.12);
  border: 1px solid rgba(53, 242, 208, 0.4);
  color: var(--neon-cyan);
  font-size: 11px;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-beat__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--chalk);
}

.page-about .about-beat p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 数据来源 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-step {
  padding: 20px 20px 22px;
  background: var(--ink-black);
}

.page-about .about-step__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--warm-orange);
}

.page-about .about-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--chalk);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
}

.page-about .about-paper {
  position: relative;
  isolation: isolate;
  margin-top: 28px;
  padding: 22px 22px 24px;
  background: var(--paper);
  color: var(--on-paper);
}

.page-about .about-paper::before {
  content: "";
  position: absolute;
  inset: 10px -10px -10px 10px;
  background: var(--deep-green);
  border: 1px solid var(--crease);
  z-index: -1;
}

.page-about .about-paper__label {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--on-paper);
}

.page-about .about-paper p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-paper);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-partner {
  padding: 22px 20px 24px;
  background: linear-gradient(180deg, rgba(20, 48, 38, 0.85), rgba(8, 13, 11, 0.9));
  border: 1px solid var(--crease);
  border-radius: var(--radius);
}

.page-about .about-partner__count {
  display: block;
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 48px;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--warm-orange);
}

.page-about .about-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--chalk);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
}

.page-about .about-honor {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--crease);
  border-top: 3px solid var(--signal);
  background: var(--deep-green);
}

.page-about .about-honor__year {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  color: var(--signal);
}

.page-about .about-honor h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--chalk);
}

.page-about .about-honor p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: 40px;
  padding: 34px 24px 44px;
  background:
    radial-gradient(520px 260px at 100% 0%, rgba(255, 138, 61, 0.14), transparent 68%),
    var(--deep-green);
  border: 1px solid var(--crease);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 5vw, 32px);
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-cta__text {
  margin: 0 0 24px;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-honor {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: start;
    gap: 22px;
  }
}

/* ---------- 桌面：左窄右宽档案流 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: center;
    padding-bottom: 48px;
  }

  .page-about .about-stat {
    padding: 22px 6px 24px;
  }

  .page-about .about-stat__num {
    font-size: 38px;
  }

  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    align-self: start;
    padding: 48px 0 24px;
    border-bottom: 0;
    border-right: 1px solid var(--about-rule);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 2px;
  }

  .page-about .about-rail__item {
    padding: 9px 14px 9px 12px;
    border: 0;
    border-left: 2px solid var(--crease);
    border-radius: 0;
    background: transparent;
  }

  .page-about .about-rail__item:hover {
    border-left-color: var(--neon-cyan);
    background: var(--about-chip);
  }

  .page-about .about-flow {
    padding-top: 20px;
  }

  .page-about .about-era {
    grid-template-columns: 158px minmax(0, 1fr);
    gap: 26px;
    padding: 26px 26px 28px;
    align-items: start;
  }

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 34px;
    align-items: start;
  }
}

/* ---------- 桌面端年份摘要悬停展开 ---------- */
@media (hover: hover) and (min-width: 960px) {
  .page-about .about-era__note {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0 !important;
    transition: max-height 240ms var(--ease), opacity 200ms var(--ease), margin-top 240ms var(--ease);
  }

  .page-about .about-era:hover .about-era__note,
  .page-about .about-era:focus-within .about-era__note {
    max-height: 5em;
    opacity: 1;
    margin-top: 10px !important;
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1200px) {
  .page-about .about-shell {
    gap: 72px;
  }

  .page-about .about-block {
    padding-top: 56px;
  }

  .page-about .about-zones {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-zone {
    padding: 18px 16px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }

  .page-about .about-era:hover,
  .page-about .about-zone:hover,
  .page-about .about-beat:hover,
  .page-about .about-btn:hover {
    transform: none;
  }
}