.page-releases {
  --rel-index-col: 40px;
  --rel-index-col-lg: 56px;
  --rel-spine-w: 2px;
  --rel-radius-tight: var(--space-2);
}

/* ---------- 首屏 ---------- */
.page-releases .rel-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-6) var(--space-8);
  border-end-start-radius: var(--radius-sm);
  border-end-end-radius: var(--radius-sm);
}

.page-releases .rel-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
}

.page-releases .rel-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: var(--overlay-scrim);
}

.page-releases .rel-hero__inner {
  position: relative;
  padding-block-start: var(--space-3);
}

.page-releases .rel-hero .breadcrumb a {
  color: var(--color-contrast-ink);
}

.page-releases .rel-hero .breadcrumb li {
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
}

.page-releases .rel-hero__eyebrow {
  margin-block: var(--space-4) var(--space-2);
  background: color-mix(in srgb, var(--color-contrast-accent) 22%, transparent);
  color: var(--color-contrast-ink);
  border-color: color-mix(in srgb, var(--color-contrast-accent) 55%, transparent);
}

.page-releases .rel-hero__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  text-wrap: balance;
}

.page-releases .rel-hero__lead {
  margin: 0 0 var(--space-6);
  max-width: 48ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

.page-releases .rel-hero__figures {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin: 0;
  padding-block-start: var(--space-4);
  border-block-start: var(--border-thin) dotted var(--color-contrast-line);
}

.page-releases .rel-hero__figure {
  display: grid;
  gap: var(--space-1);
  min-width: 128px;
}

.page-releases .rel-hero__figure dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}

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

.page-releases .rel-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.86;
  color: var(--color-contrast-ink);
}

.page-releases .rel-hero__figure:first-child .rel-hero__num {
  color: var(--color-contrast-accent);
}

/* ---------- 分类胶囊条 ---------- */
.page-releases .rel-jump {
  position: sticky;
  top: 0;
  z-index: 4;
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  border-block-end: var(--border-thin) solid var(--color-line);
}

.page-releases .rel-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-2);
}

.page-releases .rel-jump__hint {
  flex: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-releases .rel-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-releases .rel-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.3;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.page-releases .rel-chip:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.page-releases .rel-chip:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 时间轴 ---------- */
.page-releases .rel-timeline {
  padding-block-start: var(--section-y);
  background: var(--color-surface);
}

.page-releases .rel-group {
  margin-block-end: var(--section-y);
}

.page-releases .rel-group:last-child {
  margin-block-end: 0;
}

.page-releases .rel-group__head {
  max-width: 60ch;
  margin-block-end: var(--space-6);
  padding-block-end: var(--space-3);
  border-block-end: var(--border-thin) dotted var(--color-line);
}

.page-releases .rel-group__top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-releases .rel-group__lamp {
  flex: none;
  inline-size: 10px;
  block-size: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-soft);
  animation: rel-breathe 2.4s ease-in-out infinite;
}

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

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

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

.page-releases .rel-nodes::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: calc(var(--rel-index-col) / 2 - 1px);
  inline-size: var(--rel-spine-w);
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-line) 62%, transparent 100%);
}

.page-releases .rel-node {
  position: relative;
  display: grid;
  grid-template-columns: var(--rel-index-col) minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
}

.page-releases .rel-node__index {
  position: relative;
  z-index: 1;
  padding-block: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1;
  text-align: center;
  color: var(--color-primary);
}

.page-releases .rel-node__card {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-start-start-radius: var(--radius-sm);
  border-end-end-radius: var(--radius-sm);
  border-start-end-radius: var(--rel-radius-tight);
  border-end-start-radius: var(--rel-radius-tight);
  background: var(--color-surface-alt);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.page-releases .rel-node__card:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2);
}

.page-releases .rel-node__card:focus-within {
  border-color: var(--color-focus);
  box-shadow: var(--shadow-1);
}

.page-releases .rel-node__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-block-end: var(--space-2);
}

.page-releases .rel-node__when {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-releases .rel-node__lamp {
  flex: none;
  inline-size: 8px;
  block-size: 8px;
  margin-inline-start: auto;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

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

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

.page-releases .rel-node__body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

.page-releases .rel-node__body a:hover {
  color: var(--color-accent);
}

.page-releases .rel-node__impact {
  margin: 0;
  padding-block-start: var(--space-2);
  border-block-start: var(--border-thin) dotted var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
  opacity: 0.72;
  transition: opacity 160ms ease;
}

.page-releases .rel-node__card:hover .rel-node__impact,
.page-releases .rel-node__card:focus-within .rel-node__impact {
  opacity: 1;
}

.page-releases .rel-node__impact-label {
  margin-inline-end: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

/* 深色分组 */
.page-releases .rel-group--deep {
  padding: var(--space-6) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-releases .rel-group--deep .rel-group__head {
  border-block-end-color: var(--color-contrast-line);
}

.page-releases .rel-group--deep .rel-group__title {
  color: var(--color-contrast-ink);
}

.page-releases .rel-group--deep .rel-group__note {
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

.page-releases .rel-group--deep .rel-group__lamp {
  background: var(--color-contrast-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-contrast-accent) 24%, transparent);
}

.page-releases .rel-group--deep .rel-nodes::before {
  background: linear-gradient(180deg, var(--color-contrast-accent) 0%, var(--color-contrast-line) 62%, transparent 100%);
}

.page-releases .rel-group--deep .rel-node__index {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-accent);
}

.page-releases .rel-group--deep .rel-node__card {
  border-color: var(--color-contrast-line);
  background: color-mix(in srgb, var(--color-contrast-ink) 7%, var(--color-contrast-surface));
}

.page-releases .rel-group--deep .rel-node__card:hover {
  border-color: var(--color-contrast-accent);
}

.page-releases .rel-group--deep .rel-node__title {
  color: var(--color-contrast-ink);
}

.page-releases .rel-group--deep .rel-node__body {
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.page-releases .rel-group--deep .rel-node__when {
  color: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent);
}

.page-releases .rel-group--deep .rel-node__lamp {
  background: var(--color-contrast-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-contrast-accent) 26%, transparent);
}

.page-releases .rel-group--deep .rel-node__impact {
  border-block-start-color: var(--color-contrast-line);
  color: color-mix(in srgb, var(--color-contrast-ink) 64%, transparent);
}

.page-releases .rel-group--deep .rel-node__impact-label {
  color: var(--color-contrast-accent);
}

.page-releases .rel-group--deep .media-frame__caption {
  color: var(--color-contrast-ink);
}

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

.page-releases .rel-figure img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 收束 ---------- */
.page-releases .rel-close {
  margin-block-start: var(--section-y);
  padding-block: var(--section-y);
  background: var(--color-surface-alt);
  border-start-start-radius: var(--radius-sm);
  border-start-end-radius: var(--radius-sm);
}

.page-releases .rel-close__inner {
  display: grid;
  gap: var(--space-6);
}

.page-releases .rel-close__media {
  position: relative;
  margin: 0;
}

.page-releases .rel-close__media img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-releases .rel-close__title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-releases .rel-close__steps {
  display: grid;
  gap: var(--space-3);
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
  counter-reset: relstep;
}

.page-releases .rel-close__steps li {
  position: relative;
  padding-inline-start: 52px;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-close__steps li::before {
  counter-increment: relstep;
  content: counter(relstep, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 0;
  top: 4px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-primary);
}

.page-releases .rel-close__steps strong {
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

.page-releases .rel-close__steps a,
.page-releases .rel-close__note a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 3px;
}

.page-releases .rel-close__steps a:hover,
.page-releases .rel-close__note a:hover {
  color: var(--color-accent);
}

.page-releases .rel-close__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-releases .rel-close__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

@keyframes rel-breathe {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.42;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rel-group__lamp {
    animation: none;
  }
  .page-releases .rel-node__card,
  .page-releases .rel-chip,
  .page-releases .rel-node__impact {
    transition: none;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-releases .rel-hero {
    padding-block: var(--space-8) var(--space-8);
  }

  .page-releases .rel-hero__figures {
    gap: var(--space-8);
  }

  .page-releases .rel-group--deep {
    padding: var(--space-8) var(--space-6);
  }

  .page-releases .rel-nodes {
    gap: var(--space-6);
  }

  .page-releases .rel-nodes::before {
    inset-inline-start: calc(50% - 1px);
  }

  .page-releases .rel-node {
    grid-template-columns: minmax(0, 1fr) var(--rel-index-col-lg) minmax(0, 1fr);
    gap: var(--space-3);
  }

  .page-releases .rel-node__index {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
  }

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

  .page-releases .rel-node:nth-child(even) .rel-node__card {
    grid-column: 1;
  }

  .page-releases .rel-close__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-8);
  }
}

@media (min-width: 1100px) {
  .page-releases .rel-group {
    max-width: var(--container);
  }

  .page-releases .rel-group:nth-child(even) {
    padding-inline-start: var(--space-4);
  }
}
<<<END>>>