.page-releases {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-releases .breadcrumb {
  padding: var(--space-3) 0 0;
}

/* ---------- 首屏 ---------- */

.page-releases .rel-hero__grid {
  display: grid;
  gap: var(--space-3);
  align-items: stretch;
}

.page-releases .rel-hero__slab {
  display: flex;
  flex-direction: column;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-3);
}

.page-releases .rel-hero__eyebrow {
  color: var(--color-contrast-ink);
  opacity: 0.62;
  margin: 0;
}

.page-releases .rel-hero__title {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: var(--space-3) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 900;
  line-height: 1;
  letter-spacing: var(--tracking-heading);
}

.page-releases .rel-hero__title-pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.34em;
  color: var(--color-contrast-ink);
  opacity: 0.68;
}

.page-releases .rel-hero__title-ver {
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--color-contrast-accent);
}

.page-releases .rel-hero__lead {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-releases .rel-hero__points {
  list-style: none;
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
  padding: var(--space-3) 0 0;
  border-top: 1px solid var(--color-contrast-line);
}

.page-releases .rel-hero__point {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
}

.page-releases .rel-hero__point-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-contrast-accent);
}

.page-releases .rel-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 16 / 10;
  background: var(--color-surface-deep);
}

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

.page-releases .rel-anchors {
  list-style: none;
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-releases .rel-anchor {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-deep);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
}

.page-releases .rel-anchor:nth-child(2) {
  border-left-color: var(--color-accent);
}

.page-releases .rel-anchor:nth-child(3) {
  border-left-color: var(--color-ink-muted);
}

.page-releases .rel-anchor__fig {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  color: var(--color-ink);
}

.page-releases .rel-anchor__unit {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-soft);
}

.page-releases .rel-anchor__label {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-ink-soft);
}

/* ---------- 分类标签 ---------- */

.page-releases .rel-filter__head {
  margin-bottom: var(--space-4);
}

.page-releases .rel-filter__title,
.page-releases .rel-stream__title,
.page-releases .rel-rollout__title,
.page-releases .rel-exit__title {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 800;
  line-height: var(--leading-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

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

.page-releases .rel-cat {
  margin-top: var(--space-3);
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  border-left: 3px solid var(--color-primary-soft);
}

.page-releases .rel-cat__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-releases .rel-cat__text {
  max-width: var(--measure);
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-cat__vers {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
}

/* ---------- 条目流 ---------- */

.page-releases .rel-stream__head {
  margin-bottom: var(--space-4);
}

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

.page-releases .rel-item {
  position: relative;
  display: grid;
  grid-template-columns: calc(var(--space-6) + var(--space-2)) minmax(0, 1fr);
  gap: var(--space-2);
  padding-bottom: var(--space-4);
}

.page-releases .rel-item__scale {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding-top: var(--space-1);
}

.page-releases .rel-item__scale::before {
  content: "";
  position: absolute;
  top: calc(var(--space-2) + 2px);
  bottom: calc(var(--space-4) * -1);
  left: 50%;
  width: 1px;
  background: var(--color-line);
  transform: translateX(-50%);
}

.page-releases .rel-item:last-child .rel-item__scale::before {
  display: none;
}

.page-releases .rel-item__dot {
  box-sizing: border-box;
  position: relative;
  z-index: 1;
  width: 12px;
  height: 12px;
  flex: none;
  border-radius: 50%;
  background: var(--color-surface);
}

.page-releases .rel-item__dot--full {
  background: var(--color-primary);
}

.page-releases .rel-item__dot--gray {
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-left-color: transparent;
}

.page-releases .rel-item__dot--next {
  background: var(--color-surface);
  border: 2px solid var(--color-ink-muted);
}

.page-releases .rel-item__ver {
  position: relative;
  z-index: 1;
  padding: var(--space-1) 0;
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.page-releases .rel-item--lead .rel-item__body {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-releases .rel-item--brief .rel-item__body {
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-line);
}

.page-releases .rel-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
}

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

.page-releases .rel-item__status {
  padding: calc(var(--space-1) / 4) var(--space-1);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
}

.page-releases .rel-item__title {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: var(--leading-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

.page-releases .rel-item__highlight {
  max-width: var(--measure);
  margin: 0 0 var(--space-2);
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-accent);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-releases .rel-item__impact {
  max-width: var(--measure);
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-item__figure {
  margin: var(--space-3) 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.page-releases .rel-item__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-releases .rel-item__body .disclosure {
  margin-top: var(--space-2);
}

.page-releases .rel-spark {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: var(--space-3) 0;
}

.page-releases .rel-spark__base {
  stroke: var(--color-line);
  stroke-width: 1;
}

.page-releases .rel-spark__line {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
}

.page-releases .rel-spark__axis {
  fill: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

/* ---------- 灰度与全量 ---------- */

.page-releases .rel-rollout__grid {
  display: grid;
  gap: var(--space-4);
}

.page-releases .rel-rollout__intro .eyebrow {
  margin: 0;
}

.page-releases .rel-rollout__cards {
  display: grid;
  gap: var(--space-2);
}

.page-releases .rel-rollout__card {
  background: var(--color-surface);
}

.page-releases .rel-rollout__card .card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-releases .rel-rollout__card .card__body {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-rollout__card .card__meta {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
}

/* ---------- 行动出口 ---------- */

.page-releases .rel-exit__grid {
  display: grid;
  gap: var(--space-2);
}

.page-releases .rel-exit__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color 160ms ease-out, border-color 160ms ease-out;
}

.page-releases .rel-exit__link:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-primary);
}

.page-releases .rel-exit__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-releases .rel-exit__kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-accent);
}

.page-releases .rel-exit__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: 0.06em;
}

.page-releases .rel-exit__desc {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.page-releases .rel-exit__link--main {
  background: var(--color-contrast-surface);
  border-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  justify-content: center;
}

.page-releases .rel-exit__link--main .rel-exit__kicker {
  color: var(--color-contrast-accent);
}

.page-releases .rel-exit__link--main .rel-exit__desc {
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

.page-releases .rel-exit__link--main:hover {
  background: var(--color-contrast-surface);
  border-color: var(--color-contrast-accent);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-releases .rel-anchors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-releases .rel-rollout__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-releases .rel-rollout__card:first-child {
    grid-column: span 2;
  }

  .page-releases .rel-exit__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-releases .rel-exit__link--main {
    grid-row: span 2;
  }
}

@media (min-width: 900px) {
  .page-releases .rel-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-4);
  }

  .page-releases .rel-hero__slab {
    padding: var(--space-6) var(--space-4);
  }

  .page-releases .rel-hero__figure {
    aspect-ratio: auto;
    height: 100%;
    min-height: 320px;
  }

  .page-releases .rel-item {
    grid-template-columns: calc(var(--space-6) + var(--space-4)) minmax(0, 1fr);
    gap: var(--space-3);
    padding-bottom: var(--space-6);
  }

  .page-releases .rel-item--brief {
    padding-bottom: var(--space-4);
  }

  .page-releases .rel-rollout__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-6);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rel-exit__link {
    transition: none;
  }
}
</main>