.page-releases {
  --rel-gutter-num: 78px;
  --rel-band-min: 660px;
}

/* ---------- 首屏地层 ---------- */
.page-releases .hero-body {
  position: relative;
  z-index: 2;
  padding-top: calc(var(--section-y) + var(--space-2));
  padding-bottom: var(--space-6);
}

.page-releases .display-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.06;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  max-width: 20ch;
}

.page-releases .hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

.page-releases .hero-eyebrow::before {
  content: "";
  display: block;
  width: 30px;
  height: 2px;
  background: var(--color-contrast-accent);
}

.page-releases .hero-lead {
  margin: 0;
  max-width: 58ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

/* 首屏关键数字：非对称错落，不做等宽统计条 */
.page-releases .hero-figs {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-3) var(--space-6);
}

.page-releases .hero-fig {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 92px;
}

.page-releases .hero-fig__num {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}

.page-releases .hero-fig__label {
  display: block;
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
}

.page-releases .hero-fig:nth-child(2) {
  margin-bottom: var(--space-2);
}

.page-releases .hero-fig:nth-child(4) {
  margin-bottom: var(--space-3);
}

/* ---------- 阶段色带 ---------- */
.page-releases .bandstrip {
  position: relative;
  z-index: 2;
  margin-top: var(--space-6);
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}

.page-releases .bandstrip__track {
  display: flex;
  gap: 1px;
  min-width: var(--rel-band-min);
  background: var(--color-contrast-line);
  border-top: 1px solid var(--color-contrast-line);
}

.page-releases .bandstrip__seg {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 6px;
  min-height: 126px;
  padding: var(--space-3) var(--space-3) var(--space-4);
  text-decoration: none;
  border-radius: 0;
  transition: box-shadow 180ms linear;
}

.page-releases .bandstrip__seg--clay {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-releases .bandstrip__seg--moss {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-releases .bandstrip__seg--g2 {
  flex: 2 1 0;
}

.page-releases .bandstrip__seg--g3 {
  flex: 3 1 0;
}

.page-releases .bandstrip__seg:hover {
  box-shadow: inset 0 -4px 0 color-mix(in srgb, var(--color-contrast-surface) 26%, transparent);
}

.page-releases .bandstrip__seg:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: -4px;
}

.page-releases .bandstrip__idx {
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  opacity: 0.82;
}

.page-releases .bandstrip__label {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.15;
}

.page-releases .bandstrip__count {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  opacity: 0.86;
}

/* ---------- 宽幅长图 ---------- */
.page-releases .version-strip {
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-releases .version-strip .media__cap {
  margin-top: var(--space-2);
  padding: 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 筛选区 ---------- */
.page-releases .version-flow {
  position: relative;
}

.page-releases .version-flow__bar {
  border-bottom: 1px solid var(--color-line);
}

.page-releases .version-flow__bar .filter-bar {
  margin-top: var(--space-3);
}

.page-releases .filter-empty {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 阶段 ---------- */
.page-releases .stage {
  position: relative;
}

.page-releases .stage__head {
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-3);
  background: var(--color-surface-alt);
  border-left: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-md);
}

.page-releases .section--alt .stage__head {
  background: var(--color-surface-deep);
}

.page-releases .stage__band {
  margin: 0 0 var(--space-1);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--color-primary);
}

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

.page-releases .stage__summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px var(--space-2);
  align-items: baseline;
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-releases .stage__summary::before {
  content: "阶段成果";
  flex: none;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

/* ---------- 版本节点 ---------- */
.page-releases .vlist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-releases .vnode {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
}

.page-releases .vnode:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-releases .vnode__num {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.page-releases .stage--late .vnode__num {
  font-size: calc(var(--text-3xl) * 1.08);
}

.page-releases .vnode__meta {
  margin: 0 0 6px;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

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

.page-releases .vnode__text {
  margin: 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-releases .vnode__facts {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-1);
}

.page-releases .vnode__fact {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  background: var(--color-surface-deep);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
}

.page-releases .vnode__fact-k {
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-ink);
}

.page-releases .vnode__media {
  margin: var(--space-3) 0 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-releases .vnode__media .media__cap {
  margin-top: var(--space-1);
  padding: 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-releases .vnode__more {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-releases .vnode .state-label {
  margin: 0 0 var(--space-1);
}

/* ---------- 口径说明 ---------- */
.page-releases .rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-releases .rhythm__item {
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-releases .rhythm__item:nth-child(even) {
  border-top-color: var(--color-accent);
}

.page-releases .rhythm__idx {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.page-releases .rhythm__item:nth-child(even) .rhythm__idx {
  color: var(--color-accent);
}

.page-releases .rhythm__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.3;
  color: var(--color-ink);
}

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

.page-releases .rhythm__foot {
  margin: var(--space-6) 0 0;
  max-width: var(--measure);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 760px) {
  .page-releases .hero-body {
    padding-top: calc(var(--section-y-lg) - var(--space-6));
  }

  .page-releases .hero-figs {
    gap: var(--space-3) var(--space-8);
  }

  .page-releases .bandstrip {
    overflow-x: visible;
  }

  .page-releases .bandstrip__track {
    min-width: 0;
    width: 100%;
  }

  .page-releases .bandstrip__seg {
    min-height: 152px;
    padding: var(--space-4) var(--space-4) var(--space-6);
  }

  .page-releases .stage__head {
    padding: var(--space-4) var(--space-4);
  }

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

  .page-releases .vnode {
    grid-template-columns: var(--rel-gutter-num) minmax(0, 1fr);
    gap: var(--space-3);
    padding: var(--space-6) 0;
  }

  .page-releases .vnode__num {
    text-align: right;
    padding-top: 2px;
  }

  .page-releases .stage__summary {
    padding-left: calc(var(--rel-gutter-num) + var(--space-3));
  }

  .page-releases .rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-6);
  }

  .page-releases .rhythm__item:nth-child(2),
  .page-releases .rhythm__item:nth-child(4) {
    margin-top: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .page-releases .vnode__media {
    max-width: 84%;
  }
}