.page-releases {
  --rel-meta-w: 132px;
  --rel-marker-w: 22px;
  --rel-gap: var(--space-3);
  --rel-rail-x: 11px;
  --rel-slip-bg: rgba(255, 255, 255, 0.045);
}

@media (min-width: 760px) {
  .page-releases {
    --rel-rail-x: calc(var(--rel-meta-w) + var(--rel-gap) + 11px);
  }
}

/* ---------- 首屏 ---------- */

.page-releases .rel-hero {
  position: relative;
}

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

@media (min-width: 900px) {
  .page-releases .rel-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: var(--space-8);
    align-items: end;
  }
}

.page-releases .rel-hero__lead {
  display: flex;
  flex-direction: column;
}

.page-releases .rel-hero__title {
  font-size: var(--text-display);
  line-height: 1.05;
  font-weight: var(--weight-heading);
  letter-spacing: -0.012em;
  color: var(--color-ink);
  margin: var(--space-3) 0 var(--space-3);
  text-wrap: balance;
}

.page-releases .rel-hero__lede {
  max-width: 44ch;
  color: var(--color-ink-soft);
  margin: 0;
}

.page-releases .rel-hero__media {
  margin: 0;
}

.page-releases .rel-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--space-8);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.page-releases .rel-hero__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface);
}

.page-releases .rel-hero__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-accent);
}

.page-releases .rel-hero__unit {
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0;
  color: var(--color-ink-muted);
}

.page-releases .rel-hero__label {
  font-size: var(--text-xs);
  line-height: 1.5;
  color: var(--color-ink-soft);
}

/* ---------- 轴线起点 ---------- */

.page-releases .rel-origin {
  position: relative;
  height: var(--space-8);
  margin-top: var(--space-6);
}

.page-releases .rel-origin__line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--rel-rail-x);
  border-left: 1px dashed var(--color-line);
}

.page-releases .rel-origin__cap {
  position: absolute;
  top: 0;
  left: calc(var(--rel-rail-x) - 6px);
  width: 13px;
  height: 13px;
  border-radius: 2px;
  background: var(--color-accent);
}

/* ---------- 更新轴 ---------- */

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

.page-releases .rel-axis__head .section-title {
  margin: var(--space-2) 0 var(--space-2);
}

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

.page-releases .rel-filter {
  margin-bottom: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.page-releases .rel-timeline {
  position: relative;
}

.page-releases .rel-timeline .timeline__rail {
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: var(--rel-rail-x);
  width: 0;
  border-left: 1px dashed var(--color-line);
  background: none;
}

.page-releases .rel-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-6);
}

.page-releases .rel-tl {
  position: relative;
  display: grid;
  grid-template-columns: var(--rel-marker-w) minmax(0, 1fr);
  column-gap: var(--rel-gap);
  row-gap: var(--space-1);
}

@media (min-width: 760px) {
  .page-releases .rel-tl {
    grid-template-columns: var(--rel-meta-w) var(--rel-marker-w) minmax(0, 1fr);
    align-items: start;
  }
}

.page-releases .rel-tl__marker {
  grid-column: 1;
  grid-row: 1;
  justify-self: center;
  align-self: start;
  margin-top: 5px;
  width: 11px;
  height: 11px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  background: var(--color-surface);
  transition: box-shadow 180ms ease-out, background-color 180ms ease-out;
}

.page-releases .rel-tl__marker--square {
  border-radius: 2px;
  border-color: var(--color-accent);
  background: var(--color-accent);
}

.page-releases .rel-tl.is-lit .rel-tl__marker {
  box-shadow: 0 0 0 5px var(--color-primary-soft);
}

.page-releases .rel-tl.is-lit .rel-tl__marker--square {
  box-shadow: 0 0 0 5px var(--color-highlight);
}

.page-releases .rel-tl__meta {
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-ink-muted);
}

.page-releases .rel-tl__body {
  grid-column: 2;
  grid-row: 2;
}

@media (min-width: 760px) {
  .page-releases .rel-tl__meta {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    margin-top: 2px;
  }

  .page-releases .rel-tl__marker {
    grid-column: 2;
    grid-row: 1;
  }

  .page-releases .rel-tl__body {
    grid-column: 3;
    grid-row: 1;
  }
}

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

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

.page-releases .rel-tl__figure {
  margin: var(--space-3) 0 0;
  max-width: 340px;
}

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

/* ---------- 补时面板 ---------- */

.page-releases .rel-stoppage__panel {
  position: relative;
  padding: var(--space-6) var(--space-4);
  border-radius: var(--radius-lg);
  background-color: var(--color-contrast-surface);
  background-image: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent 47px,
    var(--color-contrast-line) 47px,
    var(--color-contrast-line) 48px
  );
  background-size: 48px 100%;
  color: var(--color-contrast-ink);
  overflow: hidden;
}

@media (min-width: 760px) {
  .page-releases .rel-stoppage__panel {
    padding: var(--space-8) var(--space-6);
  }
}

.page-releases .rel-stoppage__head {
  max-width: 56ch;
}

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

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

.page-releases .rel-stoppage__lede {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

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

.page-releases .rel-stoppage__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(230px, 78%);
  gap: var(--space-3);
  margin-top: var(--space-6);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-2);
}

@media (min-width: 900px) {
  .page-releases .rel-stoppage__track {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow-x: visible;
    padding-bottom: 0;
  }
}

.page-releases .rel-slip {
  scroll-snap-align: start;
  padding: var(--space-3);
  border: 1px dashed var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: var(--rel-slip-bg);
}

.page-releases .rel-slip__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
  margin-bottom: var(--space-2);
}

.page-releases .rel-slip__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-releases .rel-slip__text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.76;
}

/* ---------- 五条线 ---------- */

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

.page-releases .rel-kinds__head .section-title {
  margin: var(--space-2) 0 var(--space-2);
}

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

.page-releases .rel-kinds__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px dotted var(--color-line);
}

.page-releases .rel-kind {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: var(--space-1);
  padding: var(--space-4) 0;
  border-bottom: 1px dotted var(--color-line);
}

@media (min-width: 860px) {
  .page-releases .rel-kind {
    grid-template-columns: 56px minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    column-gap: var(--space-4);
  }
}

.page-releases .rel-kind__idx {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.page-releases .rel-kind__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-releases .rel-kind__desc {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-kind__rule {
  grid-column: 2;
  grid-row: 3;
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  border-left: 2px solid var(--color-primary-soft);
  padding-left: var(--space-2);
}

@media (min-width: 860px) {
  .page-releases .rel-kind__desc {
    grid-column: 2;
    grid-row: 2;
  }

  .page-releases .rel-kind__rule {
    grid-column: 3;
    grid-row: 1 / span 2;
    align-self: start;
    margin-top: 2px;
  }
}

/* ---------- 读法 ---------- */

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

@media (min-width: 900px) {
  .page-releases .rel-anatomy__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: var(--space-8);
    align-items: start;
  }
}

.page-releases .rel-anatomy__lead .section-title {
  margin: var(--space-2) 0 var(--space-3);
}

.page-releases .rel-anatomy__intro {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 34ch;
}

.page-releases .rel-anatomy__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

@media (min-width: 620px) {
  .page-releases .rel-anatomy__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-releases .rel-anatomy__item {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

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

.page-releases .rel-anatomy__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-1);
}

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

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

/* ---------- 出口 ---------- */

.page-releases .rel-next__panel {
  padding: var(--space-6) var(--space-4);
  border: 1px dotted var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
}

@media (min-width: 760px) {
  .page-releases .rel-next__panel {
    padding: var(--space-8) var(--space-6);
  }
}

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

.page-releases .rel-next__title {
  margin: var(--space-2) 0 var(--space-6);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .rel-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

@media (min-width: 760px) {
  .page-releases .rel-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-releases .rel-next__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface);
}

.page-releases .rel-next__link {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px dashed var(--color-primary-soft);
  align-self: flex-start;
  padding-bottom: 2px;
}

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

.page-releases .rel-next__note {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: 40ch;
}

/* ---------- 焦点与动效兜底 ---------- */

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

.page-releases .rel-timeline__list img,
.page-releases .rel-stoppage__media img,
.page-releases .rel-hero__media img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rel-tl__marker {
    transition: none;
  }
}