.page-releases {
  --rel-rule: color-mix(in srgb, var(--color-line) 78%, transparent);
  --rel-axis: color-mix(in srgb, var(--color-primary) 42%, transparent);
  --rel-wash: color-mix(in srgb, var(--color-primary-soft) 55%, var(--color-surface));
  display: block;
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
}

.page-releases .rel-hero__crumb {
  margin-bottom: var(--space-6);
}

.page-releases .rel-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: end;
}

.page-releases .rel-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: 1.05;
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: var(--space-3) 0 var(--space-4);
  max-width: 14ch;
}

.page-releases .rel-hero__lede {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  margin: 0;
}

.page-releases .rel-hero__aside {
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--rel-rule);
}

.page-releases .rel-hero__aside-label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-3);
}

.page-releases .rel-hero__figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-releases .rel-fig {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--rel-rule);
}

.page-releases .rel-fig:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-releases .rel-fig__num {
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-ink);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.page-releases .rel-fig__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-releases .rel-hero__aside-note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-releases .rel-hero__strip {
  margin-top: var(--space-8);
}

.page-releases .rel-hero__media .media__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  filter: saturate(0.6);
}

/* ---------- 通用区块标题 ---------- */
.page-releases .rel-head__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-releases .rel-head__note {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  margin: 0;
}

/* ---------- 刻度条 ---------- */
.page-releases .rel-ticks {
  display: flex;
  gap: var(--space-4);
  margin: var(--space-6) 0 var(--space-8);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--rel-rule);
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
}

/* ---------- 时间线 ---------- */
.page-releases .rel-tl {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.page-releases .rel-phase {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-releases .rel-phase__bar {
  position: relative;
  padding-left: var(--space-3);
  border-left: 2px solid var(--rel-axis);
}

.page-releases .rel-phase__code {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-1);
}

.page-releases .rel-phase__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-1);
  font-weight: var(--weight-heading);
}

.page-releases .rel-phase__range {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.06em;
}

.page-releases .rel-phase__nodes {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--rel-rule);
}

.page-releases .rel-node {
  position: relative;
  padding-bottom: var(--space-4);
}

.page-releases .rel-node::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-3) - 1px);
  top: 0.72em;
  width: 11px;
  height: 1px;
  background: var(--rel-axis);
}

.page-releases .rel-node__id {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-1);
}

.page-releases .rel-node__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
  font-weight: var(--weight-heading);
}

.page-releases .rel-node__body {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-3);
}

.page-releases .rel-node__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.page-releases .rel-node__meta dt {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-releases .rel-node__meta dd {
  margin: 0;
  color: var(--color-ink-soft);
}

.page-releases .rel-node__link {
  display: inline-block;
  margin-top: var(--space-2);
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
  font-size: var(--text-sm);
}

.page-releases .rel-node__link:hover,
.page-releases .rel-node__link:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

/* ---------- 深底成果带 ---------- */
.page-releases .rel-band__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-releases .rel-band__kicker {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-3);
}

.page-releases .rel-band__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-3);
}

.page-releases .rel-band__text {
  max-width: var(--measure);
  color: var(--color-contrast-ink);
  opacity: 0.82;
  margin: 0;
}

.page-releases .rel-band__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-releases .rel-band__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-band__item:first-child {
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-band__idx {
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-releases .rel-band__k {
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
}

/* ---------- 下载说明 ---------- */
.page-releases .rel-download__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-releases .rel-download__list {
  display: flex;
  flex-direction: column;
}

.page-releases .rel-dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-dl:first-child {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-dl__idx {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

.page-releases .rel-dl__title {
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  font-weight: 500;
  color: var(--color-ink);
  margin: 0 0 var(--space-1);
}

.page-releases .rel-dl__desc {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
}

.page-releases .rel-dl__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-releases .rel-dl__pf {
  grid-column: 2;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-releases .rel-download__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page-releases .rel-download__media {
  margin: 0;
}

.page-releases .rel-download__media .media__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  filter: saturate(0.5);
}

.page-releases .rel-download__hint {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  border-left: 2px solid var(--rel-axis);
  padding-left: var(--space-3);
  margin: 0;
}

.page-releases .rel-download__hint a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

.page-releases .rel-download__hint a:hover,
.page-releases .rel-download__hint a:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

/* ---------- 升级与回退 ---------- */
.page-releases .rel-care__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-releases .rel-care__col-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
  font-weight: var(--weight-heading);
}

.page-releases .rel-care__col--up {
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-primary);
}

.page-releases .rel-care__col--back {
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-line);
}

.page-releases .rel-care__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  counter-reset: none;
}

.page-releases .rel-care__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  align-items: baseline;
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--rel-rule);
}

.page-releases .rel-care__steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-releases .rel-care__n {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
}

.page-releases .rel-care__steps p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-releases .rel-care__steps a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

.page-releases .rel-care__steps a:hover,
.page-releases .rel-care__steps a:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

/* ---------- 修订节奏 ---------- */
.page-releases .rel-cadence__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-releases .rel-cadence__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-releases .rel-cadence__text {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-3);
}

.page-releases .rel-cadence__text a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

.page-releases .rel-cadence__text a:hover,
.page-releases .rel-cadence__text a:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

.page-releases .rel-cadence__panel {
  background: var(--color-surface-alt);
  padding: var(--space-4);
}

.page-releases .rel-cadence__panel-label {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.page-releases .rel-cadence__panel-num {
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-ink);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  margin: 0;
}

.page-releases .rel-cadence__panel-unit {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: var(--space-1) 0 var(--space-4);
}

.page-releases .rel-cadence__facts {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
}

.page-releases .rel-cadence__facts li {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-cadence__facts li span {
  min-width: 6em;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-releases .rel-cadence__panel-note {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: 0;
}

.page-releases .rel-cadence__panel-note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-accent);
}

.page-releases .rel-cadence__panel-note a:hover,
.page-releases .rel-cadence__panel-note a:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

.page-releases .rel-cadence__scale {
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--rel-rule);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-releases .rel-hero {
    padding-top: var(--space-8);
  }

  .page-releases .rel-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-releases .rel-hero__aside {
    padding-top: 0;
    padding-left: var(--space-4);
    border-top: 0;
    border-left: var(--border-thin) solid var(--rel-rule);
  }

  .page-releases .rel-phase {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--space-6);
  }

  .page-releases .rel-phase__bar {
    position: sticky;
    top: var(--space-8);
    align-self: start;
  }

  .page-releases .rel-band__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-releases .rel-download__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-releases .rel-dl {
    grid-template-columns: auto 1fr auto;
  }

  .page-releases .rel-dl__pf {
    grid-column: 3;
    grid-row: 1;
    text-align: right;
  }

  .page-releases .rel-care__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-8);
  }

  .page-releases .rel-cadence__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-releases .rel-hero__title {
    max-width: 12ch;
  }

  .page-releases .rel-fig__num {
    font-size: var(--text-3xl);
  }
}