.page-releases {
  --rel-rail: calc(var(--space-4) + var(--space-1));
  --rel-zone: var(--color-surface);
}

@media (min-width: 1024px) {
  .page-releases {
    --rel-rail: calc(var(--space-6) + var(--space-1));
  }
}

/* ---------- 顶部上下文 ---------- */

.page-releases .rel-top {
  background: var(--color-surface);
  padding: var(--space-4) 0 0;
}

.page-releases .rel-top .crumbs {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

/* ---------- 首屏 ---------- */

.page-releases .rel-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-6) 0 var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent calc(var(--space-8) - var(--border-thin)),
    var(--color-contrast-line) calc(var(--space-8) - var(--border-thin)),
    var(--color-contrast-line) var(--space-8)
  );
  opacity: 0.45;
  pointer-events: none;
}

.page-releases .rel-hero .container {
  position: relative;
  z-index: 1;
}

.page-releases .rel-hero-eyebrow {
  color: var(--color-contrast-accent);
}

.page-releases .rel-hero-title {
  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);
  margin: var(--space-2) 0 var(--space-3);
  max-width: 20ch;
}

.page-releases .rel-hero-lede {
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  max-width: 60ch;
  margin: 0 0 var(--space-6);
}

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

@media (min-width: 720px) {
  .page-releases .rel-keys {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-releases .rel-key {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rel-key-value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1.05;
  color: var(--color-contrast-ink);
}

.page-releases .rel-key-label {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

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

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

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

.page-releases .rel-hero-caption {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  opacity: 0.66;
}

/* ---------- 分类跳转刻度 ---------- */

.page-releases .rel-filters {
  background: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
  padding: var(--space-3) 0;
}

.page-releases .rel-filter-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
}

.page-releases .rel-filter {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  padding: var(--space-1) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-filter::before {
  content: "";
  width: var(--space-1);
  height: var(--space-1);
  background: var(--rel-cat, var(--color-primary));
  flex: none;
}

.page-releases .rel-filter:hover,
.page-releases .rel-filter:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

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

.page-releases .rel-filter--data {
  --rel-cat: var(--color-primary);
}

.page-releases .rel-filter--archive {
  --rel-cat: var(--color-accent);
}

.page-releases .rel-filter--mobile {
  --rel-cat: color-mix(in srgb, var(--color-primary) 55%, var(--color-contrast-accent));
}

.page-releases .rel-filter--security {
  --rel-cat: var(--color-ink-soft);
}

/* ---------- 条目流分组 ---------- */

.page-releases .rel-flow {
  background: var(--rel-zone);
  border-bottom: var(--border-thin) solid var(--color-line);
  padding: var(--section-y) 0;
}

.page-releases .rel-flow--alt {
  --rel-zone: var(--color-surface-alt);
}

.page-releases .rel-flow-head {
  max-width: var(--measure);
  margin-bottom: var(--space-4);
}

.page-releases .rel-flow-head h2 {
  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);
  margin: var(--space-2) 0 var(--space-2);
}

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

/* ---------- 条目 ---------- */

.page-releases .rel-entries {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  position: relative;
}

.page-releases .rel-entries::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--rel-rail) / 2);
  transform: translateX(-50%);
  width: var(--border-thin);
  background: var(--color-line);
}

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

@media (min-width: 1024px) {
  .page-releases .rel-entry {
    gap: var(--space-3);
    padding: var(--space-6) 0;
  }
}

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

.page-releases .rel-entry--data {
  --rel-cat: var(--color-primary);
}

.page-releases .rel-entry--archive {
  --rel-cat: var(--color-accent);
}

.page-releases .rel-entry--mobile {
  --rel-cat: color-mix(in srgb, var(--color-primary) 55%, var(--color-contrast-accent));
}

.page-releases .rel-entry--security {
  --rel-cat: var(--color-ink-soft);
}

.page-releases .rel-entry-rail {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.page-releases .rel-entry-num {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1;
  color: var(--rel-cat, var(--color-ink));
  background: var(--rel-zone);
  padding: var(--space-1) 0;
  letter-spacing: 0.02em;
}

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

.page-releases .rel-entry-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  margin: 0 0 var(--space-2);
}

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

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

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

.page-releases .rel-entry-impact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-3);
}

.page-releases .rel-entry-impact-key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rel-cat, var(--color-accent));
}

.page-releases .rel-entry-link {
  display: inline-block;
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 38%, transparent);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-releases .rel-entry-link:hover,
.page-releases .rel-entry-link:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

/* ---------- 浏览入口 ---------- */

.page-releases .rel-guide {
  background: var(--color-surface-alt);
  padding: var(--section-y) 0 var(--section-y-lg);
}

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

.page-releases .rel-guide-head h2 {
  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);
  margin: var(--space-2) 0 0;
}

.page-releases .rel-guide-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

@media (min-width: 760px) {
  .page-releases .rel-guide-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

.page-releases .rel-guide-col-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-3);
}

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

.page-releases .rel-guide-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-releases .rel-guide-list .num {
  font-family: var(--font-mono);
  color: var(--color-ink-muted);
  flex: none;
}

.page-releases .rel-guide-list--links li {
  justify-content: flex-start;
}

.page-releases .rel-guide-link {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 32%, transparent);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-releases .rel-guide-link:hover,
.page-releases .rel-guide-link:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

/* ---------- 时间口径说明 ---------- */

.page-releases .rel-note-disclosure {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

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