.page-about {
  --about-radius: 24px 6px 24px 6px;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-cn);
  overflow-x: hidden;
}

.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 64px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% -20%, rgba(200, 255, 77, .12), transparent 60%),
    radial-gradient(90% 70% at 0% 110%, rgba(22, 16, 54, .9), transparent 65%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 100%;
  opacity: .28;
  pointer-events: none;
}

.page-about .about-hero .breadcrumbs {
  position: relative;
  margin-bottom: 28px;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-hero__rail {
  display: none;
}

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

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 8vw, 62px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.03em;
  max-width: 16em;
}

.page-about .about-hero .lede {
  margin-top: 20px;
  max-width: 36em;
  color: var(--text);
  opacity: .88;
}

.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__item {
  flex: 1 1 180px;
  min-width: 0;
}

.page-about .about-index__item--wide {
  flex: 1 1 260px;
}

.page-about .about-index a {
  display: flex;
  flex-direction: column;
  gap: 6px;
  height: 100%;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: rgba(11, 18, 32, .82);
  color: var(--text);
  text-decoration: none;
  transition: border-color .24s var(--ease-out), background .24s var(--ease-out), transform .24s var(--ease-out);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--lime);
  background: rgba(200, 255, 77, .08);
  transform: translateY(-3px);
}

.page-about .about-index__k {
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--lime);
}

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

/* ---------- 分区通用 ---------- */
.page-about .about-band {
  position: relative;
  padding: 72px 0;
}

.page-about .about-band--teal {
  background: var(--deep-teal);
  clip-path: polygon(0 1.4%, 100% 0, 100% 98.6%, 0 100%);
  padding-top: 88px;
  padding-bottom: 92px;
}

.page-about .about-band--wine {
  background: var(--wine);
  clip-path: polygon(0 0, 100% 1.4%, 100% 100%, 0 98.6%);
  padding-top: 92px;
  padding-bottom: 88px;
}

.page-about .about-band--indigo {
  background: var(--indigo);
  clip-path: polygon(0 1.2%, 100% 0, 100% 98.8%, 0 100%);
  padding-top: 88px;
  padding-bottom: 92px;
}

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

.page-about .about-band--plate {
  background: linear-gradient(180deg, var(--ink) 0%, var(--surface) 100%);
}

.page-about .about-band__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-band__rail {
  display: none;
}

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

.page-about .about-band__title {
  margin: 0 0 20px;
  font-size: clamp(23px, 5.6vw, 38px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.page-about .about-band__lede {
  margin: -8px 0 26px;
  color: var(--muted);
  font-size: 15px;
}

.page-about .about-band p {
  color: var(--text);
  opacity: .86;
  line-height: 1.78;
  max-width: 38em;
}

.page-about .about-band p + p {
  margin-top: 14px;
}

/* ---------- 起源 ---------- */
.page-about .about-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-about .about-origin__media {
  margin: 0;
  border-radius: 20px 4px 32px 4px;
  overflow: hidden;
}

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

/* ---------- 编年轨道 ---------- */
.page-about .about-track {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 18px;
  left: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--line), var(--lime-dim) 55%, var(--line));
  opacity: .7;
}

.page-about .about-track__item {
  position: relative;
  padding-left: 40px;
}

.page-about .about-track__item + .about-track__item {
  margin-top: 8px;
}

.page-about .about-track__summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 16px 14px 16px 16px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--surface);
  cursor: pointer;
  list-style: none;
  transition: border-color .24s var(--ease-out), background .24s var(--ease-out);
}

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

.page-about .about-track__summary::before {
  content: "";
  position: absolute;
  left: -40px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--line);
  transition: background .24s var(--ease-out), border-color .24s var(--ease-out), box-shadow .24s var(--ease-out);
}

.page-about .about-track__node[open] > .about-track__summary,
.page-about .about-track__summary:hover {
  border-color: var(--lime-dim);
  background: #101a2b;
}

.page-about .about-track__node[open] > .about-track__summary::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 5px rgba(200, 255, 77, .16);
}

.page-about .about-track__year {
  font-size: 20px;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -.01em;
}

.page-about .about-track__name {
  flex: 1 1 160px;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-track__summary .disclosure__icon {
  margin-left: auto;
  flex: 0 0 auto;
}

.page-about .about-track__item--now .about-track__year {
  color: var(--ember);
}

.page-about .about-track__item--now .about-track__node[open] > .about-track__summary::before {
  background: var(--ember);
  border-color: var(--ember);
  box-shadow: 0 0 0 5px rgba(255, 90, 43, .18);
}

.page-about .about-track__body {
  padding: 4px 16px 6px 4px;
}

.page-about .about-track__body p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
  opacity: 1;
}

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

.page-about .about-crew__media {
  margin: 0;
  border-radius: 28px 4px 20px 4px;
  overflow: hidden;
  order: -1;
}

.page-about .about-crew__list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-crew__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  border-left: 2px solid var(--lime-dim);
  background: rgba(5, 8, 14, .34);
  border-radius: 0 18px 18px 0;
  font-size: 14px;
  color: var(--text);
  opacity: .92;
}

.page-about .about-crew__num {
  font-size: 22px;
  font-weight: 700;
  color: var(--lime);
}

/* ---------- 协作 ---------- */
.page-about .about-partner__media {
  margin: 30px 0 0;
  border-radius: 32px 4px 20px 4px;
  overflow: hidden;
}

/* ---------- 仪表板 ---------- */
.page-about .about-band--stats .about-band__title {
  margin-bottom: 26px;
}

.page-about .about-stats {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: 22px 4px 22px 4px;
  background: transparent;
  transition: border-color .24s var(--ease-out), background .24s var(--ease-out);
}

.page-about .about-stat:hover {
  border-color: var(--lime-dim);
  background: rgba(200, 255, 77, .05);
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(24px, 6vw, 34px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--lime);
  letter-spacing: -.02em;
  transition: transform .3s var(--ease-out);
}

.page-about .about-stat:hover .about-stat__num {
  transform: translateY(-3px);
}

.page-about .about-stat__label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-stat__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  opacity: .72;
  transition: opacity .24s var(--ease-out);
}

.page-about .about-stat:hover .about-stat__note {
  opacity: 1;
}

/* ---------- 步骤条 ---------- */
.page-about .about-flow__rail {
  color: var(--lime-dim);
  margin: 6px 0 22px;
}

.page-about .about-flow__rail svg {
  display: block;
  width: 100%;
  height: 28px;
}

.page-about .about-flow__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-flow__summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 16px;
  border: 1px solid var(--line);
  border-radius: 4px 22px 4px 22px;
  background: var(--surface);
  cursor: pointer;
  list-style: none;
  transition: border-color .24s var(--ease-out), background .24s var(--ease-out);
}

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

.page-about .about-flow__step[open] > .about-flow__summary,
.page-about .about-flow__summary:hover {
  border-color: var(--lime);
  background: #101a2b;
}

.page-about .about-flow__no {
  font-size: 13px;
  font-weight: 700;
  color: var(--ember);
  letter-spacing: .06em;
}

.page-about .about-flow__name {
  flex: 1 1 auto;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-flow__summary .disclosure__icon {
  margin-left: auto;
  flex: 0 0 auto;
}

.page-about .about-flow__body {
  padding: 10px 4px 4px;
}

.page-about .about-flow__body p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  opacity: 1;
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  padding: 64px 0 80px;
  background: var(--ink);
  border-top: 1px solid var(--line);
}

.page-about .about-next__inner {
  position: relative;
}

.page-about .about-next__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-about .about-next__text {
  margin: 0 0 24px;
  max-width: 34em;
  color: var(--muted);
  line-height: 1.78;
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 40px 0 88px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 32px;
  }

  .page-about .about-hero__rail {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding-top: 8px;
  }

  .page-about .about-hero__rail-text {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 11px;
    letter-spacing: .28em;
    color: var(--muted);
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 12px;
  }

  .page-about .about-band {
    padding: 104px 0;
  }

  .page-about .about-band--teal,
  .page-about .about-band--indigo {
    padding-top: 116px;
    padding-bottom: 120px;
  }

  .page-about .about-band--wine {
    padding-top: 120px;
    padding-bottom: 116px;
  }

  .page-about .about-band__grid {
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 32px;
  }

  .page-about .about-band__rail {
    display: flex;
    justify-content: flex-start;
    padding-top: 6px;
  }

  .page-about .about-band__rail-text {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 11px;
    letter-spacing: .26em;
    color: var(--lime);
    opacity: .78;
    border-left: 1px solid var(--line);
    padding-left: 12px;
  }

  .page-about .about-brand--wine,
  .page-about .about-band--wine .about-band__rail-text {
    color: #ffb9a3;
  }

  .page-about .about-band--indigo .about-band__rail-text {
    color: #b9a8ff;
  }

  .page-about .about-band__title {
    margin-bottom: 24px;
    max-width: 20em;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-origin__media {
    margin-top: 6px;
  }

  .page-about .about-crew {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-crew__media {
    order: 0;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-track__item {
    padding-left: 56px;
  }

  .page-about .about-track__summary {
    padding: 18px 20px 18px 22px;
  }

  .page-about .about-track__summary::before {
    left: -56px;
    top: 24px;
  }

  .page-about .about-track::before {
    left: 6px;
  }

  .page-about .about-track__body {
    padding-left: 22px;
  }

  .page-about .about-next {
    padding: 96px 0 112px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-stat__num,
  .page-about .about-track__summary,
  .page-about .about-track__summary::before,
  .page-about .about-flow__summary {
    transition: none;
  }

  .page-about .about-index a:hover,
  .page-about .about-stat:hover .about-stat__num {
    transform: none;
  }
}