.page-about {
  --about-shadow: 12px 12px 0 rgb(0 0 0 / .5);
  --about-gap: 24px;
  padding-bottom: 72px;
  background: var(--ink-900);
  color: var(--silver);
}

.page-about .about-crumbs {
  padding-top: 20px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 28px;
}

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

.page-about .about-hero__title {
  margin: 12px 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 62ch;
}

.page-about .about-stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stats li {
  background: var(--ink-900);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stats__n {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.page-about .about-stats__l {
  font-size: 13px;
  color: var(--silver-dim);
  line-height: 1.4;
}

.page-about .about-binder {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--line-strong);
  box-shadow: var(--about-shadow);
  margin: 0;
}

.page-about .about-binder__stamp {
  font-size: 12px;
  color: var(--silver-dim);
  letter-spacing: .08em;
}

.page-about .about-binder__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(.55) contrast(1.1);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-binder__cap {
  padding: 10px 14px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--silver-dim);
}

.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}

.page-about .about-hero__aside .vnote--edge {
  margin-left: 2px;
}

/* ---------- 赛季带 ---------- */
.page-about .about-band {
  padding-left: 0;
  padding-right: 0;
}

.page-about .about-band__stage {
  position: relative;
  overflow: hidden;
  padding: 48px 0 32px;
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-band__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .2;
  filter: saturate(.35) contrast(1.15);
  z-index: 0;
}

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

.page-about .about-band__head {
  max-width: 640px;
}

.page-about .about-band__hint {
  margin-top: 10px;
  font-size: 15px;
}

.page-about .about-band__band {
  margin-top: 26px;
}

.page-about .about-band__track {
  display: flex;
  align-items: flex-end;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 24px 4px 14px;
  border-bottom: 1px solid var(--line-strong);
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-band__track:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.page-about .about-band__item {
  flex: 0 0 auto;
  width: 66px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding-bottom: 8px;
  text-decoration: none;
  color: inherit;
  position: relative;
}

.page-about .about-band__item::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -14px;
  width: 1px;
  height: 14px;
  background: var(--line-strong);
}

.page-about .about-band__item:hover .about-band__yr,
.page-about .about-band__item:focus-visible .about-band__yr {
  color: var(--accent);
}

.page-about .about-band__yr {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--silver-dim);
  transition: color .18s var(--ease);
}

.page-about .about-band__dot {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--silver-dim);
  transition: background .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-band__dot--md {
  width: 14px;
  height: 14px;
  background: var(--silver);
}

.page-about .about-band__dot--lg {
  width: 20px;
  height: 20px;
  background: var(--silver);
}

.page-about .about-band__item.is-current .about-band__yr {
  color: var(--accent);
  font-weight: 700;
}

.page-about .about-band__item.is-current .about-band__dot {
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-soft);
}

.page-about .about-band__note {
  margin-top: 22px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--silver-dim);
}

/* ---------- 编年索引 ---------- */
.page-about .about-chron__lede {
  margin-top: 14px;
  max-width: 66ch;
}

.page-about .about-rec {
  margin-top: 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink-700);
}

.page-about .about-rec[open] {
  border-left-color: var(--accent);
}

.page-about .about-rec > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 18px;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--paper);
}

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

.page-about .about-rec > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 18px;
  color: var(--accent);
  line-height: 1;
}

.page-about .about-rec[open] > summary::after {
  content: "–";
}

.page-about .about-rec__body {
  padding: 0 18px 20px;
}

.page-about .about-rec .data-table td:nth-child(2) {
  min-width: 220px;
}

.page-about .about-rec .data-table td:nth-child(3) {
  color: var(--silver-dim);
  font-size: 14px;
}

.page-about .about-chron__more {
  margin-top: 26px;
  font-size: 15px;
  color: var(--silver-dim);
}

.page-about .about-chron__more a,
.page-about .about-ver__link a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 口径版本 ---------- */
.page-about .about-ver__lede {
  margin-top: 14px;
  max-width: 64ch;
}

.page-about .about-ver__tabs {
  margin-top: 28px;
}

.page-about .about-ver__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-ver__tab {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-bottom: none;
  color: var(--silver-dim);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
  padding: 10px 14px;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-about .about-ver__tab:hover {
  color: var(--paper);
}

.page-about .about-ver__tab[aria-selected="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink-900);
  font-weight: 700;
}

.page-about .about-ver__tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-about .about-ver__panel {
  padding: 24px 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-ver__text p {
  margin-top: 12px;
  max-width: 60ch;
}

.page-about .about-ver__flag {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-meter {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 18px;
}

.page-about .about-meter__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .about-meter__k {
  font-size: 14px;
  color: var(--silver);
}

.page-about .about-meter__track {
  position: relative;
  display: block;
  height: 6px;
  background: var(--ink-700);
  overflow: hidden;
}

.page-about .about-meter__fill {
  display: block;
  height: 100%;
  background: var(--accent);
}

.page-about .about-meter__fill--w30 { width: 30%; }
.page-about .about-meter__fill--w60 { width: 60%; background: var(--cyan); }
.page-about .about-meter__fill--w90 { width: 90%; background: var(--lava); }

.page-about .about-meter__v {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--silver-dim);
}

.page-about .about-ver__link {
  margin-top: 24px;
  font-size: 15px;
  color: var(--silver-dim);
}

/* ---------- 维护团队 ---------- */
.page-about .about-team__wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-team__text p {
  margin-top: 14px;
  max-width: 60ch;
}

.page-about .about-team__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__list li {
  background: var(--ink-900);
  padding: 14px 0;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
}

.page-about .about-team__n {
  grid-row: span 2;
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.page-about .about-team__k {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--paper);
}

.page-about .about-team__d {
  font-size: 14px;
  color: var(--silver-dim);
  line-height: 1.7;
}

.page-about .about-team__fig {
  margin: 0;
}

.page-about .about-team__fig .figure__media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
}

.page-about .about-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.5) contrast(1.15);
}

.page-about .about-team__fig .figure__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* ---------- 引用与勘误 ---------- */
.page-about .about-cite__wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 26px;
}

.page-about .about-cite__block {
  background: var(--ink-800);
  border: 1px solid var(--line);
  padding: 24px 20px;
}

.page-about .about-cite__block--accent {
  background: var(--ink-700);
  border-left: 3px solid var(--lava);
}

.page-about .about-cite__block--accent p {
  margin-top: 12px;
  font-size: 15px;
  color: var(--silver);
}

.page-about .about-cite__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-cite__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.7;
}

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

.page-about .about-cite__list .mono {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: .08em;
}

.page-about .about-cite__btn {
  margin-top: 20px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-meter__row {
    grid-template-columns: 130px minmax(0, 1fr) 56px;
    align-items: center;
    gap: 12px;
  }

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

@media (min-width: 900px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-hero__wrap {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__aside {
    grid-column: 1;
    grid-row: 1;
    margin-top: 42px;
  }

  .page-about .about-hero__main {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: 40px;
  }

  .page-about .about-band__stage {
    padding: 64px 0 44px;
  }

  .page-about .about-band__item {
    width: 76px;
  }

  .page-about .about-rec > summary {
    font-size: 18px;
    padding: 18px 22px;
  }

  .page-about .about-rec__body {
    padding: 0 22px 24px;
  }

  .page-about .about-ver__panel {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    padding-top: 32px;
  }

  .page-about .about-team__wrap {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-cite__wrap {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
  }

  .page-about .about-cite__block {
    padding: 30px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-band__track {
    scroll-behavior: auto;
    cursor: auto;
  }

  .page-about .about-band__yr,
  .page-about .about-band__dot,
  .page-about .about-ver__tab {
    transition: none;
  }
}