.page-releases {
  --rel-dot: 9px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px dotted var(--color-line);
}

.page-releases .rel-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--color-primary) 14%, transparent), transparent 58%);
  pointer-events: none;
  z-index: 0;
}

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

.page-releases .rel-hero__eyebrow {
  margin: var(--space-4) 0 var(--space-2);
  color: var(--color-accent);
}

.page-releases .rel-hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-releases .rel-hero__lead {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  color: var(--color-ink);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-releases .rel-figs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-4);
  margin: var(--space-6) 0 0;
  padding: var(--space-3) 0 0;
  list-style: none;
  border-top: 1px dotted var(--color-line);
}

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

.page-releases .rel-fig__value {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

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

.page-releases .rel-hero__bg {
  position: relative;
  z-index: 0;
  width: 100%;
  aspect-ratio: 2 / 1;
  margin-top: var(--space-6);
  overflow: hidden;
  border-top: 1px dotted var(--color-line);
  border-bottom: 1px dotted var(--color-line);
}

.page-releases .rel-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-releases .rel-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--color-surface) 0%, color-mix(in srgb, var(--color-surface) 40%, transparent) 45%, transparent 100%);
  pointer-events: none;
}

/* ---------- 时间线主体 ---------- */
.page-releases .rel-flow {
  padding-block: var(--section-y);
}

.page-releases .rel-flow__head {
  max-width: var(--measure);
}

.page-releases .rel-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-block: var(--space-4) var(--space-6);
}

.page-releases .filter-btn.is-active,
.page-releases .filter-btn[aria-pressed="true"] {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-releases .rel-divider {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  margin-block: var(--space-8) var(--space-4);
  padding-block: var(--space-2);
  border-top: 1px dotted var(--color-line);
  border-bottom: 1px dotted var(--color-line);
}

.page-releases .rel-divider__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  letter-spacing: var(--tracking-heading);
}

.page-releases .rel-divider__name {
  margin: 0;
  font-family: var(--font-heading);
  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-divider__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
}

/* ---------- 节点与刻度轴 ---------- */
.page-releases .rel-nodes {
  position: relative;
  display: grid;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-releases .rel-nodes::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 4px;
  border-left: 1px dotted var(--color-line);
}

.page-releases .rel-node {
  position: relative;
  padding-left: var(--space-6);
}

.page-releases .rel-node::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 0;
  width: var(--rel-dot);
  height: var(--rel-dot);
  border-radius: 50%;
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.page-releases .rel-node[data-tags="active"]::before {
  background: var(--color-surface);
}

.page-releases .rel-card {
  padding: var(--space-3);
  transition: border-color 180ms ease;
}

.page-releases .rel-card:hover {
  border-color: var(--color-accent);
}

.page-releases .rel-card__head {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.page-releases .rel-card__rev {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

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

.page-releases .rel-card__kv {
  margin: 0;
  padding-top: var(--space-2);
  border-top: 1px dotted var(--color-line);
}

.page-releases .rel-card__kv .kv__row {
  display: grid;
  gap: 2px;
}

.page-releases .rel-card__kv .kv__row + .kv__row {
  margin-top: var(--space-2);
}

.page-releases .rel-card__kv .kv__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: var(--tracking-heading);
}

.page-releases .rel-card__kv .kv__val {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* ---------- 图片展签 ---------- */
.page-releases .rel-figure {
  position: relative;
  margin: 0 0 var(--space-6);
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-releases .rel-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-releases .rel-figure__tag {
  position: absolute;
  right: var(--space-2);
  bottom: var(--space-2);
  padding: calc(var(--space-1) / 2) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

/* ---------- 汇总 ---------- */
.page-releases .rel-summary {
  padding-block: var(--section-y-lg) var(--section-y);
  border-top: 1px dotted var(--color-line);
}

.page-releases .rel-callout {
  margin-bottom: var(--space-8);
}

.page-releases .rel-summary__grid {
  display: grid;
  gap: var(--space-6);
}

.page-releases .rel-summary__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-releases .rel-summary__lead,
.page-releases .rel-summary__note {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-releases .rel-summary__note {
  color: var(--color-ink-soft);
}

.page-releases .rel-table {
  width: 100%;
  margin-bottom: var(--space-4);
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-releases .rel-table th,
.page-releases .rel-table td {
  padding: var(--space-2) var(--space-2);
  text-align: left;
  vertical-align: top;
  border-bottom: 1px dotted var(--color-line);
}

.page-releases .rel-table thead th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-muted);
  background: var(--color-surface-alt);
}

.page-releases .rel-table tbody td:first-child {
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

.page-releases .rel-table tbody td.mono {
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.page-releases .rel-table tbody td:last-child {
  color: var(--color-ink-soft);
}

.page-releases .rel-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-releases .rel-figure--side {
  margin-bottom: 0;
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-releases .rel-hero__inner {
    padding-block: var(--space-8) var(--section-y-lg);
  }

  .page-releases .rel-hero__bg {
    position: absolute;
    inset: 0 0 0 auto;
    z-index: 0;
    width: 46%;
    height: 100%;
    aspect-ratio: auto;
    margin-top: 0;
    border: 0;
  }

  .page-releases .rel-hero__bg::after {
    background: linear-gradient(90deg, var(--color-surface) 0%, color-mix(in srgb, var(--color-surface) 45%, transparent) 52%, transparent 100%);
  }

  .page-releases .rel-figs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-releases .rel-nodes::before {
    left: calc(50% - 0.5px);
  }

  .page-releases .rel-node {
    width: calc(50% - var(--space-4));
    padding-left: 0;
    justify-self: start;
  }

  .page-releases .rel-node:nth-child(even) {
    justify-self: end;
  }

  .page-releases .rel-node::before {
    top: 22px;
  }

  .page-releases .rel-node:nth-child(odd)::before {
    left: auto;
    right: calc(-1 * var(--space-4) - 4.5px);
  }

  .page-releases .rel-node:nth-child(even)::before {
    left: calc(-1 * var(--space-4) - 4.5px);
    right: auto;
  }

  .page-releases .rel-summary__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-8);
  }
}

@media (min-width: 1180px) {
  .page-releases .rel-summary__title {
    font-size: var(--text-4xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rel-card {
    transition: none;
  }
}