.page-releases {
  --rel-axis-width: 26px;
  --rel-node-gap: var(--space-4);
}

/* ---------- 面包屑 ---------- */
.page-releases .breadcrumb {
  padding: var(--space-3) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-releases .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
}

.page-releases .breadcrumb li + li::before {
  content: "/";
  margin-right: var(--space-1);
  color: var(--color-line);
}

.page-releases .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-releases .breadcrumb a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 首屏 ---------- */
.page-releases .releases-hero {
  padding-top: var(--space-3);
}

.page-releases .hero-top {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-releases .hero-top {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: var(--space-6);
    align-items: end;
  }
}

.page-releases .hero-copy .display-title {
  font-size: var(--text-display);
  line-height: 1.05;
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-releases .releases-kicker {
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-primary);
  margin: 0;
}

.page-releases .hero-copy .lead {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
}

.page-releases .hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-2);
}

.page-releases .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 900 / 620;
  object-fit: cover;
}

.page-releases .hero-figure .figure-caption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  background: var(--color-surface);
}

/* ---------- 关键数字 ---------- */
.page-releases .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-6);
}

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

.page-releases .hero-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-releases .hero-stat:nth-child(2) { background: var(--color-primary-soft); }
.page-releases .hero-stat:nth-child(3) { background: var(--color-surface-deep); }
.page-releases .hero-stat:nth-child(4) { background: var(--color-highlight); }

.page-releases .hero-stat .figure-value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}

.page-releases .hero-stat:nth-child(4) .figure-value {
  color: var(--color-accent);
}

.page-releases .hero-stat-label {
  font-size: var(--text-xs);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 横向阶段轴 ---------- */
.page-releases .stage-axis {
  list-style: none;
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2) var(--space-3);
  margin: var(--space-6) 0 0;
  padding: 0;
}

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

.page-releases .stage-axis::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 10px;
  height: calc(var(--border-thick) * 2);
  background: var(--color-line);
}

.page-releases .stage-axis-item {
  position: relative;
  padding-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: calc(var(--space-1) / 2);
}

.page-releases .stage-axis-item::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-surface);
  border: calc(var(--border-thick) * 2) solid var(--color-primary);
  box-sizing: border-box;
}

.page-releases .stage-axis-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.06em;
}

.page-releases .stage-axis-name {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

/* ---------- 通用章节头 ---------- */
.page-releases .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  align-items: baseline;
  margin-bottom: var(--space-6);
}

.page-releases .section-head .section-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-releases .section-head .section-title {
  margin: 0;
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .section-head .section-sub {
  grid-column: 2;
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .section-head .section-sub a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.page-releases .section-head .section-sub a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 编号前缀刻度尺 ---------- */
.page-releases .prefix-scale {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 var(--space-6);
  overflow: visible;
}

.page-releases .prefix-scale .prefix-rule {
  stroke: var(--color-line);
  stroke-width: 1;
}

.page-releases .prefix-scale .prefix-mark {
  stroke: var(--color-primary);
  stroke-width: 2;
}

.page-releases .prefix-scale .prefix-code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  fill: var(--color-primary);
  letter-spacing: 0.06em;
}

.page-releases .prefix-scale .prefix-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  fill: var(--color-ink-muted);
}

/* ---------- 阶段总览卡 ---------- */
.page-releases .stage-overview {
  display: grid;
  gap: var(--space-3);
}

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

.page-releases .stage-card {
  display: block;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-1);
  transition: transform 200ms ease-out, box-shadow 200ms ease-out;
}

.page-releases .stage-card--a { background: var(--color-surface-alt); }
.page-releases .stage-card--b { background: var(--color-surface-deep); }
.page-releases .stage-card--c { background: var(--color-primary-soft); }
.page-releases .stage-card--d { background: var(--color-highlight); }

.page-releases .stage-card:hover,
.page-releases .stage-card:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-releases .stage-card:focus-visible {
  outline: calc(var(--border-thick) * 2) solid var(--color-focus);
  outline-offset: 2px;
}

.page-releases .stage-card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-releases .stage-card-title {
  margin: var(--space-1) 0 var(--space-2);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .stage-card-desc {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .stage-card-meta {
  display: block;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 纹理图 ---------- */
.page-releases .tl-texture {
  margin: 0 0 var(--space-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-deep);
  max-height: 220px;
}

.page-releases .tl-texture img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
}

/* ---------- 阶段色彩带 ---------- */
.page-releases .tl-band {
  position: relative;
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-3);
}

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

.page-releases .tl-band--a { background: var(--color-surface-alt); }
.page-releases .tl-band--b { background: var(--color-surface-deep); }
.page-releases .tl-band--c { background: var(--color-primary-soft); }
.page-releases .tl-band--d { background: var(--color-highlight); }

.page-releases .tl-divider {
  height: 6px;
  margin: var(--space-6) 0;
  border-top: var(--border-thin) solid var(--color-ink-muted);
  border-bottom: var(--border-thin) solid var(--color-ink-muted);
}

.page-releases .tl-band-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: calc(var(--border-thick) * 2) solid var(--color-surface);
  margin-bottom: var(--space-4);
}

.page-releases .tl-band-num {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-releases .tl-band-title {
  margin: 0 0 calc(var(--space-1) / 2);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .tl-band-sub {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 时间轴 ---------- */
.page-releases .tl-track {
  position: relative;
  display: grid;
  gap: var(--space-4);
}

.page-releases .tl-track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 13px;
  width: calc(var(--border-thick) * 2);
  background: var(--color-line);
}

.page-releases .tl-entry {
  position: relative;
  display: grid;
  grid-template-columns: var(--rel-axis-width) minmax(0, 1fr);
  column-gap: var(--space-2);
}

.page-releases .tl-node {
  position: relative;
}

.page-releases .tl-node::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-surface);
  border: calc(var(--border-thick) * 2) solid var(--color-primary);
  box-sizing: border-box;
  z-index: 1;
}

@media (min-width: 900px) {
  .page-releases .tl-track::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-releases .tl-entry {
    grid-template-columns: minmax(0, 1fr) 64px minmax(0, 1fr);
    column-gap: 0;
  }

  .page-releases .tl-node {
    grid-column: 2;
    grid-row: 1;
  }

  .page-releases .tl-card {
    grid-column: 1;
    grid-row: 1;
  }

  .page-releases .tl-entry--right .tl-card {
    grid-column: 3;
  }

  .page-releases .tl-node::before {
    top: 30px;
  }
}

/* ---------- 条目卡 ---------- */
.page-releases .tl-card {
  background: var(--color-surface);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-1);
  transition: transform 200ms ease-out, box-shadow 200ms ease-out, border-color 200ms ease-out;
}

.page-releases .tl-card:hover,
.page-releases .tl-card:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-color: var(--color-primary);
}

.page-releases .tl-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-1) var(--space-2);
}

.page-releases .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: calc(var(--space-1) / 2) var(--space-1);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
  transition: background-color 180ms ease-out, border-color 180ms ease-out;
}

.page-releases .copy-btn:hover,
.page-releases .copy-btn:focus-visible {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-releases .copy-btn:focus-visible {
  outline: calc(var(--border-thick) * 2) solid var(--color-focus);
  outline-offset: 2px;
}

.page-releases .copy-btn .copy-btn-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-ink);
}

.page-releases .copy-btn .copy-btn-hint {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-releases .status {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--space-1) / 2);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.page-releases .status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-ink-muted);
}

.page-releases .status-dot--ok { background: var(--color-primary); }
.page-releases .status-dot--run { background: var(--color-accent); }
.page-releases .status-dot--muted { background: var(--color-ink-muted); }

.page-releases .tl-title {
  margin: var(--space-2) 0 var(--space-1);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .tl-change {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-releases .tl-card:hover .tl-change,
.page-releases .tl-card:focus-within .tl-change {
  display: block;
  overflow: visible;
}

.page-releases .tl-fields {
  display: grid;
  gap: calc(var(--space-1) / 2);
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .tl-field {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: var(--space-1);
  font-size: var(--text-xs);
  line-height: var(--leading-body);
}

.page-releases .tl-field dt {
  color: var(--color-ink-muted);
}

.page-releases .tl-field dd {
  margin: 0;
  color: var(--color-ink);
}

/* ---------- 核对字段 ---------- */
.page-releases .fields-layout {
  display: grid;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .page-releases .fields-layout {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: var(--space-6);
    align-items: start;
  }
}

.page-releases .fields-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}

.page-releases .fields-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 720 / 720;
  object-fit: cover;
}

.page-releases .fields-figure .figure-caption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  background: var(--color-surface);
}

.page-releases .field-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-releases .field-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: var(--space-3);
  row-gap: calc(var(--space-1) / 2);
  padding: var(--space-3) 0;
  border-top: calc(var(--border-thick) * 2) solid var(--color-line);
}

.page-releases .field-step:last-child {
  border-bottom: calc(var(--border-thick) * 2) solid var(--color-line);
}

.page-releases .field-step-num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-releases .field-step-title {
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .field-step p {
  grid-column: 2;
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 适配清单入口 ---------- */
.page-releases .fit-slab {
  padding: var(--space-6) var(--space-3);
  border-radius: var(--radius-lg);
}

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

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

.page-releases .fit-kicker {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

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

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

.page-releases .fit-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-2);
  margin: var(--space-6) 0;
}

.page-releases .fit-fact {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space-1) / 2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-releases .fit-fact .figure-value {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  line-height: 1;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-releases .fit-fact-label {
  font-size: var(--text-xs);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .fit-links {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .fit-links a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.page-releases .fit-links a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 420px) {
  .page-releases .section-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-releases .section-head .section-sub {
    grid-column: 1;
  }

  .page-releases .tl-band-head {
    flex-direction: column;
    gap: var(--space-2);
  }

  .page-releases .tl-field {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-releases .field-step-num {
    font-size: var(--text-lg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .tl-card,
  .page-releases .stage-card,
  .page-releases .copy-btn {
    transition: none;
  }
}