.page-releases {
  --rel-rail: 18px;
  --rel-node-pad: calc(var(--space-6) + var(--space-2));
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  padding-top: var(--space-8);
  padding-bottom: var(--space-6);
}

.page-releases .rel-hero__top {
  border-bottom: 1px dashed var(--color-line);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-releases .rel-hero__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 20ch;
}

.page-releases .rel-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

.page-releases .rel-hero__lead .lede {
  margin: 0 0 var(--space-4);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-releases .rel-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-releases .rel-crumb a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-accent);
}

.page-releases .rel-crumb a:hover,
.page-releases .rel-crumb a:focus-visible {
  border-bottom-style: solid;
}

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

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

.page-releases .rel-frame {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-surface-alt);
}

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

.page-releases .rel-frame--hero {
  aspect-ratio: 2 / 1;
}

.page-releases .rel-frame--tail {
  aspect-ratio: 3 / 2;
}

/* 反色数据带 */
.page-releases .rel-hero__stats.panel-contrast {
  margin-top: var(--space-8);
  padding: var(--space-6);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-sm);
}

.page-releases .rel-hero__stats .rel-stat {
  border-top: 2px solid var(--color-primary);
  padding-top: var(--space-2);
}

.page-releases .rel-hero__stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-ink);
}

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

.page-releases .rel-hero__stats-note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.78;
  max-width: 46ch;
}

/* ---------- 区块通用 ---------- */
.page-releases .rel-section {
  padding-top: var(--section-y);
  padding-bottom: 0;
}

.page-releases .rel-section:last-of-type {
  padding-bottom: var(--section-y);
}

.page-releases .section-title {
  color: var(--color-ink);
}

.page-releases .section-note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-accent);
}

.page-releases .section-note a:hover,
.page-releases .section-note a:focus-visible {
  border-bottom-style: solid;
}

/* ---------- 四条演进线 ---------- */
.page-releases .rel-lines {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.page-releases .rel-line {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-bottom: 1px dashed var(--color-line);
}

.page-releases .rel-line__code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-releases .rel-line__tag {
  justify-self: start;
}

.page-releases .rel-line__text {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

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

/* ---------- 筛选器 ---------- */
.page-releases .rel-filter {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.page-releases .rel-empty {
  margin: var(--space-4) 0 0;
  padding: var(--space-4);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

/* ---------- 时间线 ---------- */
.page-releases .rel-timeline {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-releases .rel-node {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: 0 0 var(--space-8) var(--rel-node-pad);
}

.page-releases .rel-node::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0;
  height: 100%;
  border-left: 1px dashed var(--color-line);
}

.page-releases .rel-node:last-child::before {
  height: var(--space-4);
}

.page-releases .rel-node__marker {
  position: absolute;
  left: 0;
  top: 7px;
  width: 13px;
  height: 13px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

.page-releases .rel-node__phase {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.page-releases .rel-node__code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-releases .rel-node__phase-name {
  margin: 0;
  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 .rel-node__body {
  min-width: 0;
}

.page-releases .rel-node__change {
  margin: 0 0 var(--space-1);
  color: var(--color-ink);
  max-width: var(--measure);
}

.page-releases .rel-node__scope {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-releases .rel-node__gain {
  display: inline-block;
  margin: 0;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
  background: var(--color-contrast-surface);
  border-left: 2px solid var(--color-primary);
  border-radius: var(--radius-sm);
}

.page-releases .rel-node__figure {
  margin: var(--space-4) 0 0;
  max-width: 520px;
}

.page-releases .rel-node__figure .figure__caption,
.page-releases .rel-tail-figure .figure__caption,
.page-releases .rel-hero__figure .figure__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-releases .rel-node.is-hit .rel-node__body {
  background: var(--color-highlight);
  box-shadow: -6px 0 0 var(--color-highlight);
}

.page-releases .rel-tail-figure {
  margin: var(--space-8) 0 0;
  max-width: 620px;
}

/* ---------- 记录口径 ---------- */
.page-releases .rel-scope {
  margin-top: var(--space-6);
  border-top: 1px solid var(--color-line);
}

.page-releases .rel-scope__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-bottom: 1px dashed var(--color-line);
}

.page-releases .rel-scope__k {
  position: relative;
  margin: 0;
  padding-left: var(--space-3);
  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-scope__k::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 9px;
  height: 2px;
  background: var(--color-primary);
}

.page-releases .rel-scope__v {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

/* ---------- 反馈入口 ---------- */
.page-releases .rel-feedback__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding: var(--space-6) 0 0;
  border-top: 3px solid var(--color-primary);
}

.page-releases .rel-feedback__lead .section-title {
  max-width: 22ch;
}

.page-releases .rel-feedback__text {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

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

.page-releases .rel-feedback__links li {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: 1px dashed var(--color-line);
}

.page-releases .rel-feedback__links a {
  justify-self: start;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

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

.page-releases .rel-feedback__links span {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-releases .rel-hero__stats.panel-contrast {
    grid-template-columns: repeat(3, minmax(0, auto));
    column-gap: var(--space-8);
    align-items: end;
  }

  .page-releases .rel-hero__stats-note {
    grid-column: 1 / -1;
    margin-top: var(--space-2);
  }

  .page-releases .rel-line {
    grid-template-columns: 72px minmax(0, 160px) minmax(0, 1fr) auto;
    align-items: baseline;
    column-gap: var(--space-4);
  }

  .page-releases .rel-line__tag {
    justify-self: start;
  }

  .page-releases .rel-feedback__links li {
    grid-template-columns: minmax(0, 140px) minmax(0, 1fr);
    column-gap: var(--space-4);
    align-items: baseline;
  }

  .page-releases .rel-scope__row {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    column-gap: var(--space-6);
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-releases .rel-hero {
    padding-top: var(--section-y);
  }

  .page-releases .rel-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: var(--space-8);
  }

  .page-releases .rel-node {
    grid-template-columns: 190px minmax(0, 1fr);
    column-gap: var(--space-6);
    padding-left: var(--rel-node-pad);
    --rel-node-pad: 54px;
  }

  .page-releases .rel-node::before {
    left: 18px;
  }

  .page-releases .rel-node__marker {
    left: 11px;
  }

  .page-releases .rel-node__phase {
    align-items: flex-start;
  }

  .page-releases .rel-tail-figure {
    margin-left: calc(190px + var(--space-6));
  }

  .page-releases .rel-feedback__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: var(--space-8);
    align-items: start;
  }

  .page-releases .rel-hero__stats.panel-contrast {
    padding: var(--space-8);
  }
}

@media (min-width: 1080px) {
  .page-releases .rel-node {
    grid-template-columns: 230px minmax(0, 1fr);
    --rel-node-pad: 66px;
  }

  .page-releases .rel-node::before {
    left: 22px;
  }

  .page-releases .rel-node__marker {
    left: 15px;
  }

  .page-releases .rel-tail-figure {
    margin-left: calc(230px + var(--space-6));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rel-node,
  .page-releases .rel-line {
    transition: none;
  }
}
<<<END>>>