.page-releases .breadcrumb {
  padding-top: var(--space-4);
  padding-bottom: var(--space-3);
}

.page-releases .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-releases .breadcrumb__list li + li::before {
  content: "／";
  padding: 0 var(--space-1);
  color: var(--color-line);
}

.page-releases .breadcrumb__list a {
  color: inherit;
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 150ms ease-out, border-color 150ms ease-out;
}

.page-releases .breadcrumb__list a:hover,
.page-releases .breadcrumb__list a:focus-visible {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}

.page-releases .breadcrumb__list [aria-current="page"] {
  color: var(--color-ink);
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-releases .rel-hero__media {
  position: absolute;
  inset: 0;
}

.page-releases .rel-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.45);
}

.page-releases .rel-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
}

.page-releases .rel-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: var(--space-8);
  padding-bottom: var(--space-6);
}

.page-releases .rel-hero__eyebrow {
  margin: 0 0 var(--space-4);
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
  letter-spacing: 0.14em;
}

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

.page-releases .rel-hero__lede {
  margin: 0 0 var(--space-6);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
}

.page-releases .rel-hero__stats {
  list-style: none;
  margin: 0;
  padding: var(--space-4) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-releases .rel-stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-contrast-ink);
  font-variant-numeric: tabular-nums;
}

.page-releases .rel-stat__label {
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

/* ---------- 阶段索引 ---------- */
.page-releases .rel-stages {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-stage {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-stage__link {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-1);
  padding: var(--space-4) 0;
  color: inherit;
  text-decoration: none;
  transition: background-color 150ms ease-out;
}

.page-releases .rel-stage__num {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
  transition: color 150ms ease-out;
}

.page-releases .rel-stage__name {
  grid-column: 2;
  grid-row: 1;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-releases .rel-stage__desc {
  grid-column: 2;
  grid-row: 2;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-stage__count {
  grid-column: 2;
  grid-row: 3;
  color: var(--color-ink-muted);
}

.page-releases .rel-stage__link:hover .rel-stage__num,
.page-releases .rel-stage__link:focus-visible .rel-stage__num {
  color: var(--color-primary);
}

.page-releases .rel-stage__link:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: var(--space-1);
}

/* ---------- 时间线 ---------- */
.page-releases .rel-filter {
  margin: var(--space-4) 0 var(--space-6);
}

.page-releases .rel-stage-block {
  margin: 0 0 var(--space-8);
  scroll-margin-top: var(--space-6);
}

.page-releases .rel-stage-block:last-of-type {
  margin-bottom: 0;
}

.page-releases .rel-stage-block__head {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  column-gap: var(--space-3);
  align-items: start;
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-ink);
}

.page-releases .rel-stage-block__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.page-releases .rel-stage-block__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-releases .rel-stage-block__note {
  grid-column: 2;
  grid-row: 2;
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-nodes {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-releases .rel-nodes::before {
  content: "";
  position: absolute;
  left: 45px;
  top: 0;
  bottom: 0;
  width: var(--border-thin);
  background-color: var(--color-line);
}

.page-releases .rel-node {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 22px;
  align-items: start;
  padding-bottom: var(--space-6);
}

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

.page-releases .rel-node::before {
  content: "";
  position: absolute;
  left: 41px;
  top: 9px;
  width: 9px;
  height: 9px;
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-node__num {
  grid-column: 1;
  grid-row: 1;
  display: block;
  text-align: right;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
}

.page-releases .rel-node__body {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
}

.page-releases .rel-node__stage {
  margin: 0 0 var(--space-1);
  color: var(--color-ink-muted);
}

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

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

.page-releases .rel-node__fields {
  margin: var(--space-3) 0 0;
  display: grid;
  gap: var(--space-2);
}

.page-releases .rel-node__field {
  min-width: 0;
}

.page-releases .rel-node__field dt {
  margin: 0;
  color: var(--color-ink-muted);
}

.page-releases .rel-node__field dd {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-node__field dd .tag + .tag {
  margin-left: var(--space-1);
}

.page-releases .rel-node--current::before {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.page-releases .rel-node--current .rel-node__num {
  color: var(--color-accent);
}

.page-releases .rel-media {
  margin: var(--space-6) 0 0;
}

/* ---------- 字段说明 ---------- */
.page-releases .rel-table {
  width: 100%;
}

/* ---------- 交叉引用 ---------- */
.page-releases .rel-cross__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-cross__item {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-cross__item a {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: var(--space-1);
  padding: var(--space-4) 0;
  color: inherit;
  text-decoration: none;
  transition: background-color 150ms ease-out;
}

.page-releases .rel-cross__name {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  transition: color 150ms ease-out;
}

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

.page-releases .rel-cross__item a:hover .rel-cross__name,
.page-releases .rel-cross__item a:focus-visible .rel-cross__name {
  color: var(--color-primary);
}

.page-releases .rel-cross__item a:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: var(--space-1);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-releases .rel-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-releases .rel-hero__inner {
    padding-top: var(--section-y);
    padding-bottom: var(--section-y-lg);
  }

  .page-releases .rel-node {
    grid-template-columns: 44px minmax(0, 1fr);
    column-gap: var(--space-4);
    padding-bottom: var(--space-8);
  }

  .page-releases .rel-nodes::before {
    left: 58px;
  }

  .page-releases .rel-node::before {
    left: 53px;
    top: 10px;
    width: 11px;
    height: 11px;
  }

  .page-releases .rel-node__num {
    font-size: var(--text-2xl);
  }

  .page-releases .rel-node__fields {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: var(--space-4);
    margin-top: var(--space-4);
  }

  .page-releases .rel-stage__link {
    grid-template-columns: max-content minmax(0, 1fr) max-content;
    column-gap: var(--space-4);
    row-gap: var(--space-1);
  }

  .page-releases .rel-stage__count {
    grid-column: 3;
    grid-row: 1;
    align-self: baseline;
  }

  .page-releases .rel-cross__item a {
    grid-template-columns: 220px minmax(0, 1fr);
    column-gap: var(--space-4);
    align-items: baseline;
    row-gap: 0;
  }
}

@media (min-width: 1024px) {
  .page-releases .rel-media {
    margin-left: 76px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rel-stage__link,
  .page-releases .rel-stage__num,
  .page-releases .rel-cross__item a,
  .page-releases .rel-cross__name,
  .page-releases .breadcrumb__list a {
    transition: none;
  }
}