.page-releases {
  --rel-rail: calc(var(--space-8) + var(--space-1));
  --rel-tick: calc(var(--space-1) * 0.75);
  --rel-soft-ink: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
  background: var(--color-surface);
  color: var(--color-ink);
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  padding-top: calc(var(--space-8) + var(--space-6));
  padding-bottom: calc(var(--space-6) + var(--space-2));
  border-bottom: calc(var(--border-thin) * 3) double var(--color-line);
}
.page-releases .rel-hero .breadcrumb {
  display: block;
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-releases .rel-hero .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-releases .rel-hero .breadcrumb a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.page-releases .rel-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
.page-releases .rel-hero-lead .label {
  display: inline-block;
  margin-bottom: var(--space-2);
}
.page-releases .rel-title {
  margin: 0 0 var(--space-3);
  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-ink);
}
.page-releases .rel-lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* 图片框 */
.page-releases .rel-frame {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  background: var(--color-surface-deep);
}
.page-releases .rel-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}
.page-releases .rel-frame--hero { aspect-ratio: 3 / 2; }
.page-releases .rel-frame--wide { aspect-ratio: 3 / 2; }
.page-releases .rel-frame--tall { aspect-ratio: 4 / 5; }
.page-releases .media-overlay {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}
.page-releases .media-label {
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
}

/* 版本号与刻度 */
.page-releases .rel-counter {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}
.page-releases .rel-counter-top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: var(--space-2) var(--space-3);
}
.page-releases .rel-counter-label {
  display: inline-block;
  margin: 0;
  padding: calc(var(--space-1) / 2) var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.page-releases .rel-counter-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--color-primary);
}
.page-releases .rel-ruler {
  position: relative;
  height: var(--space-3);
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-line) 0 var(--border-thin),
    transparent var(--border-thin) calc(100% / 42)
  );
}
.page-releases .rel-ruler-mark {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: calc(var(--space-1) / 2);
  background: var(--color-primary);
}
.page-releases .rel-counter-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-releases .rel-counter-meta .mono {
  color: var(--color-ink);
  font-family: var(--font-mono);
}

/* ---------- 演进线索引 ---------- */
.page-releases .rel-lines {
  background: var(--color-surface-alt);
}
.page-releases .rel-lines .section-title,
.page-releases .rel-flow-head .section-title {
  margin: 0 0 var(--space-2);
  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-sub {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-releases .rel-line-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}
.page-releases .rel-line { position: relative; }
.page-releases .rel-radio {
  position: absolute;
  width: var(--border-thin);
  height: var(--border-thin);
  opacity: 0;
  pointer-events: none;
}
.page-releases .rel-line-label {
  display: grid;
  grid-template-columns: calc(var(--space-4) + var(--space-1)) 1fr auto;
  gap: calc(var(--space-1) / 2) var(--space-2);
  align-items: baseline;
  padding: var(--space-2) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  cursor: pointer;
  transition: background 160ms linear, border-color 160ms linear, color 160ms linear;
}
.page-releases .rel-line-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-releases .rel-line-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-releases .rel-line-count {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-releases .rel-line-desc {
  grid-column: 1 / -1;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}
.page-releases .rel-line-label:hover {
  border-color: var(--color-primary);
}
.page-releases .rel-radio:checked + .rel-line-label {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.page-releases .rel-radio:checked + .rel-line-label .rel-line-name,
.page-releases .rel-radio:checked + .rel-line-label .rel-line-num,
.page-releases .rel-radio:checked + .rel-line-label .rel-line-count,
.page-releases .rel-radio:checked + .rel-line-label .rel-line-desc {
  color: var(--color-primary-ink);
}
.page-releases .rel-radio:focus-visible + .rel-line-label {
  outline: calc(var(--border-thin) * 2) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * 2);
}

/* ---------- 条目流 ---------- */
.page-releases .rel-flow-sec {
  background: var(--color-surface);
}
.page-releases .rel-flow-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
.page-releases .rel-note-title {
  margin: var(--space-1) 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-releases .sidenote {
  padding: var(--space-3);
  border-left: calc(var(--border-thin) * 3) solid var(--color-primary);
  background: var(--color-primary-soft);
}
.page-releases .sidenote p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-releases .sidenote-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-primary);
}
.page-releases .rel-jump {
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.page-releases .rel-flow {
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  border-top: calc(var(--border-thin) * 3) double var(--color-line);
}
.page-releases .entry {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-releases .entry-rail {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.page-releases .entry-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-ink-muted);
  transition: color 160ms linear;
}
.page-releases .entry:hover .entry-num {
  color: var(--color-primary);
}
.page-releases .entry-tick {
  display: block;
  flex: 0 0 auto;
  width: var(--space-2);
  height: var(--border-thin);
  background: var(--color-line);
}
.page-releases .entry-time {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.page-releases .entry-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
}
.page-releases .entry-tag {
  padding: calc(var(--space-1) / 2) var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink);
  background: var(--color-surface-deep);
}
.page-releases .entry-tag--realtime { background: color-mix(in srgb, var(--color-primary) 22%, var(--color-surface)); }
.page-releases .entry-tag--table { background: color-mix(in srgb, var(--color-primary) 12%, var(--color-surface)); }
.page-releases .entry-tag--panel { background: color-mix(in srgb, var(--color-accent) 16%, var(--color-surface)); }
.page-releases .entry-tag--mobile { background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface)); }
.page-releases .entry-tag--account { background: var(--color-surface-deep); }
.page-releases .entry-ver {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.page-releases .entry-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 .entry-point,
.page-releases .entry-impact {
  max-width: var(--measure);
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}
.page-releases .entry-point { color: var(--color-ink); }
.page-releases .entry-impact { color: var(--color-ink-soft); }
.page-releases .entry-key {
  display: inline-block;
  margin-right: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
  border-bottom: var(--border-thin) solid var(--color-primary);
}
.page-releases .entry-figure {
  margin-top: var(--space-3);
}

/* 当前版本条目：深墨反差段 */
.page-releases .entry--current {
  padding-left: var(--space-3);
  padding-right: var(--space-3);
  background: var(--color-contrast-surface);
  border-bottom-color: var(--color-contrast-line);
}
.page-releases .entry--current .entry-num { color: var(--color-contrast-ink); }
.page-releases .entry--current:hover .entry-num { color: var(--color-contrast-accent); }
.page-releases .entry--current .entry-time { color: var(--rel-soft-ink); }
.page-releases .entry--current .entry-ver { color: var(--rel-soft-ink); }
.page-releases .entry--current .entry-tag {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
}
.page-releases .entry--current .entry-title { color: var(--color-contrast-ink); }
.page-releases .entry--current .entry-point { color: var(--color-contrast-ink); }
.page-releases .entry--current .entry-impact { color: var(--rel-soft-ink); }
.page-releases .entry--current .entry-key {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.page-releases .entry--current .entry-tick { background: var(--color-contrast-line); }

/* 纯 CSS 演进线筛选 */
.page-releases:has(#rel-line-realtime:checked) .entry:not(.line-realtime),
.page-releases:has(#rel-line-table:checked) .entry:not(.line-table),
.page-releases:has(#rel-line-panel:checked) .entry:not(.line-panel),
.page-releases:has(#rel-line-mobile:checked) .entry:not(.line-mobile),
.page-releases:has(#rel-line-account:checked) .entry:not(.line-account) {
  display: none;
}

/* ---------- 行动出口 ---------- */
.page-releases .rel-exit-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding: var(--space-6) var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.page-releases .kicker--contrast {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
  border-bottom: var(--border-thin) solid var(--color-contrast-accent);
}
.page-releases .rel-exit-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}
.page-releases .rel-exit-text {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--rel-soft-ink);
}
.page-releases .rel-exit-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-releases .rel-exit-item {
  display: grid;
  gap: calc(var(--space-1) / 2);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}
.page-releases .rel-exit-link {
  justify-self: start;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-accent);
  transition: color 160ms linear, border-color 160ms linear;
}
.page-releases .rel-exit-link:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-ink);
}
.page-releases .rel-exit-note {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--rel-soft-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-releases .rel-flow-head {
    grid-template-columns: 8fr 4fr;
    gap: var(--space-6);
  }
  .page-releases .rel-exit-inner {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-releases .rel-hero {
    padding-top: calc(var(--space-8) * 2);
  }
  .page-releases .rel-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: var(--space-6);
  }
  .page-releases .rel-counter {
    grid-column: 1 / -1;
    margin-top: var(--space-2);
  }
  .page-releases .rel-line-label {
    grid-template-columns:
      calc(var(--space-4) + var(--space-1))
      calc(var(--space-8) + var(--space-4))
      1fr
      auto;
    align-items: baseline;
  }
  .page-releases .rel-line-desc {
    grid-column: 3;
    grid-row: 1;
  }
  .page-releases .rel-line-count {
    grid-column: 4;
    grid-row: 1;
  }
  .page-releases .entry {
    grid-template-columns: var(--rel-rail) 1fr;
    gap: var(--space-4);
    padding: var(--space-6) 0;
  }
  .page-releases .entry-rail {
    position: sticky;
    top: var(--space-6);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  .page-releases .entry-tick {
    width: var(--border-thin);
    height: var(--space-6);
    background: transparent;
    background-image: repeating-linear-gradient(
      180deg,
      var(--color-line) 0 var(--border-thin),
      transparent var(--border-thin) var(--rel-tick)
    );
  }
  .page-releases .entry--current .entry-tick {
    background-image: repeating-linear-gradient(
      180deg,
      var(--color-contrast-line) 0 var(--border-thin),
      transparent var(--border-thin) var(--rel-tick)
    );
  }
  .page-releases .rel-exit-inner {
    grid-template-columns: 6fr 6fr;
    gap: var(--space-8);
    padding: var(--space-8);
  }
}
<<<END>>>