.page-releases .container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.page-releases a:focus-visible,
.page-releases button:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y-lg) 0 var(--section-y);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-crumbs {
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

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

.page-releases .rel-crumbs li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-contrast-line);
}

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

.page-releases .rel-crumbs a:hover {
  border-bottom-color: currentColor;
}

.page-releases .rel-hero-kicker {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-contrast-accent);
}

.page-releases .rel-hero-title {
  margin: 0 0 var(--space-4);
  max-width: min(100%, 22em);
  font-family: var(--font-heading);
  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);
}

.page-releases .rel-hero-lede {
  margin: 0 0 var(--space-8);
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-releases .rel-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--border-thin);
  margin: 0 0 var(--space-8);
  padding: var(--border-thin);
  background: var(--color-contrast-line);
}

.page-releases .rel-stat {
  padding: var(--space-3);
  background: color-mix(in srgb, var(--color-contrast-ink) 6%, var(--color-contrast-surface));
}

.page-releases .rel-stat dt {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  opacity: 0.62;
}

.page-releases .rel-stat dd {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  color: var(--color-contrast-ink);
}

/* 时间轴 */
.page-releases .rel-axis {
  margin-top: var(--space-2);
}

.page-releases .rel-axis-stops {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--gutter);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-releases .rel-stop {
  position: relative;
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-stop::before {
  content: "";
  position: absolute;
  left: 0;
  top: -4px;
  width: 7px;
  height: 7px;
  background: var(--color-primary);
}

.page-releases .rel-stop:last-child::before {
  background: var(--color-contrast-accent);
}

.page-releases .rel-stop-num {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-releases .rel-stop-name {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-contrast-ink);
}

/* ---------- 阶段索引条 ---------- */
.page-releases .rel-phase-nav {
  background: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-phase-nav-list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-releases .rel-phase-nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  border-right: var(--border-thin) solid var(--color-line);
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.page-releases .rel-phase-nav-link:first-child {
  border-left: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-phase-nav-link span.mono {
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.page-releases .rel-phase-nav-link:hover {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-releases .rel-phase-nav-link[aria-current="true"],
.page-releases .rel-phase-nav-link[aria-current="location"] {
  color: var(--color-primary);
  box-shadow: inset 0 -2px 0 var(--color-primary);
}

/* ---------- 阶段区块 ---------- */
.page-releases .rel-phase {
  padding: var(--section-y) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-phase-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-releases .rel-phase-num {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-accent);
}

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

.page-releases .rel-phase-sum {
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-phase-facts {
  margin: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-phase-facts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-releases .rel-phase-facts dd {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  text-align: right;
  color: var(--color-ink);
}

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

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

/* 节点列表 */
.page-releases .rel-nodes {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-releases .rel-node {
  position: relative;
  padding: 0 0 var(--space-6) var(--space-4);
  border-left: var(--border-thin) solid var(--color-line);
}

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

.page-releases .rel-node::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 6px;
  width: 7px;
  height: 7px;
  background: var(--color-primary);
}

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

.page-releases .rel-node-meta {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* 字段规范面板 */
.page-releases .rel-spec {
  margin: 0 0 var(--space-6);
  padding: var(--space-4);
  background: var(--color-surface-deep);
  border-top: var(--border-thin) solid var(--color-primary);
}

.page-releases .rel-spec-label {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.page-releases .rel-spec-list {
  margin: 0;
}

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

.page-releases .rel-spec-row:last-child {
  border-bottom: 0;
}

.page-releases .rel-spec-row dt {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-releases .rel-spec-row dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

/* ---------- 中段视觉间隔 ---------- */
.page-releases .rel-interlude {
  margin: 0;
  padding: var(--section-y) 0 0;
}

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

.page-releases .rel-interlude .media-caption {
  margin-top: var(--space-2);
}

/* ---------- 节点总览 ---------- */
.page-releases .rel-overview {
  padding: var(--section-y) 0;
}

.page-releases .rel-overview-head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

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

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

.page-releases .rel-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  margin-bottom: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-filter {
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-releases .rel-filter:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-releases .rel-filter[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-releases .rel-filter-status {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-releases .rel-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-timeline-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-timeline-num {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-releases .rel-timeline-phase {
  margin: 0 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.page-releases .rel-timeline-title {
  margin: 0 0 var(--space-1);
  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-timeline-desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-releases .rel-status {
  justify-self: start;
  display: inline-block;
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  white-space: nowrap;
  border: var(--border-thin) solid currentColor;
  border-radius: var(--radius-md);
}

.page-releases .rel-status--done {
  color: var(--color-primary);
}

.page-releases .rel-status--review {
  color: var(--color-accent);
}

.page-releases .rel-status--edit {
  color: var(--color-ink-muted);
}

/* ---------- 延伸入口 ---------- */
.page-releases .rel-next {
  padding: var(--section-y) 0;
  background: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

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

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

.page-releases .rel-next-link {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-releases .rel-next-link:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-releases .container {
    padding: 0 var(--space-4);
  }

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

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

  .page-releases .rel-spec-row {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--space-3);
    align-items: baseline;
  }

  .page-releases .rel-timeline-item {
    grid-template-columns: 48px minmax(0, 1fr) 92px;
    gap: var(--space-4);
    align-items: start;
  }

  .page-releases .rel-status {
    justify-self: end;
  }
}

@media (min-width: 900px) {
  .page-releases .rel-phase-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-8);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-releases a,
  .page-releases button {
    transition-duration: 0.01ms !important;
  }
}