.page-releases {
  overflow-x: hidden;
}

/* ---------- 首屏海报 ---------- */
.page-releases .rl-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-6) 0 calc(var(--space-6) + 64px);
}

.page-releases .rl-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.page-releases .rl-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
  filter: grayscale(1);
}

.page-releases .rl-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
}

.page-releases .rl-hero__kicker {
  margin: 0 0 var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-releases .rl-hero__figure {
  margin: 0;
  font-family: var(--font-mono);
  font-size: calc(var(--text-figure) * 1.15);
  font-weight: var(--weight-heading);
  line-height: 0.78;
  letter-spacing: -0.04em;
  color: var(--color-contrast-accent);
}

.page-releases .rl-hero__headline {
  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-contrast-ink);
  margin: calc(var(--space-2) * -1) 0 var(--space-4);
  position: relative;
  z-index: 2;
}

.page-releases .rl-hero__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-releases .rl-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
}

.page-releases .rl-hero__stat {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.page-releases .rl-hero__stat-num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-releases .rl-hero__stat-lab {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-releases .rl-hero__wedge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 64px;
  background: var(--color-primary);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  z-index: 0;
}

/* ---------- 页面索引刻度 ---------- */
.page-releases .rl-index {
  background: var(--color-surface-deep);
}

.page-releases .rl-index__inner {
  display: flex;
  gap: var(--space-4);
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-releases .rl-index__inner::-webkit-scrollbar {
  display: none;
}

.page-releases .rl-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 120ms linear, border-color 120ms linear;
}

.page-releases .rl-index__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-releases .rl-index__link:hover,
.page-releases .rl-index__link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.page-releases .rl-index__link:hover .rl-index__num,
.page-releases .rl-index__link[aria-current="true"] .rl-index__num {
  color: var(--color-accent);
}

.page-releases .rl-index__link[aria-current="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 三组口径 ---------- */
.page-releases .rl-groups__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
}

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

.page-releases .rl-switch__btn {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: background 120ms linear, color 120ms linear, border-color 120ms linear;
}

.page-releases .rl-switch__btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-releases .rl-switch__btn[aria-pressed="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-releases .rl-groups__grid {
  display: grid;
  gap: var(--space-3);
}

.page-releases .rl-groupcard {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-top: 3px solid var(--color-line);
}

.page-releases .rl-groupcard--core {
  border-top-color: var(--color-primary);
}

.page-releases .rl-groupcard--phase {
  border-top-color: var(--color-accent);
}

.page-releases .rl-groupcard--special {
  border-top-color: var(--color-ink-muted);
}

.page-releases .rl-groupcard__tag {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

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

.page-releases .rl-groups__figure {
  margin: var(--space-6) 0 0;
}

.page-releases .rl-groups__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* ---------- 时间线主干 ---------- */
.page-releases .rl-timeline__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rl-timeline__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-releases .rl-timeline__axis {
  display: none;
}

.page-releases .rl-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-6);
  border-left: var(--border-thick) solid var(--color-line);
}

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

.page-releases .rl-node::before {
  content: "";
  position: absolute;
  left: calc(var(--space-3) * -1 - 1px);
  top: calc(var(--space-3) + 2px);
  width: var(--space-2);
  height: 2px;
  background: var(--color-line);
}

.page-releases .rl-node--core::before {
  background: var(--color-primary);
}

.page-releases .rl-node--phase::before {
  background: var(--color-accent);
}

.page-releases .rl-node--special::before {
  background: var(--color-ink-muted);
}

.page-releases .rl-node__group {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-releases .rl-node__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
  cursor: pointer;
  list-style: none;
}

.page-releases .rl-node__summary::-webkit-details-marker {
  display: none;
}

.page-releases .rl-node__summary::marker {
  content: "";
}

.page-releases .rl-node__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--color-ink-muted);
  transition: color 120ms linear;
}

.page-releases .rl-node__group[open] .rl-node__num,
.page-releases .rl-node__group:hover .rl-node__num {
  color: var(--color-primary);
}

.page-releases .rl-node__text {
  flex: 1 1 100%;
  min-width: 0;
  display: block;
}

.page-releases .rl-node__title {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: 0.01em;
  color: var(--color-ink);
}

.page-releases .rl-node__hook {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rl-node__tag {
  flex: 0 0 auto;
  align-self: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  padding: 3px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  color: var(--color-ink-soft);
}

.page-releases .rl-node__arrow {
  flex: 0 0 auto;
  align-self: center;
  width: calc(var(--space-1) + 1px);
  height: calc(var(--space-1) + 1px);
  border-right: var(--border-thick) solid var(--color-ink-muted);
  border-bottom: var(--border-thick) solid var(--color-ink-muted);
  transform: rotate(45deg);
  transition: transform 180ms ease-out;
}

.page-releases .rl-node__group[open] .rl-node__arrow {
  transform: rotate(225deg);
}

.page-releases .rl-node__detail {
  padding: 0 0 var(--space-3);
}

.page-releases .rl-node__detail > p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-releases .rl-node__detail > p:last-child {
  margin-bottom: 0;
}

.page-releases .rl-node__ql {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-releases .rl-node__change {
  background: var(--color-highlight);
  padding: var(--space-2);
  border-radius: var(--radius-md);
}

.page-releases .rl-node__change .rl-node__ql {
  color: var(--color-accent);
}

/* ---------- 全宽横幅 ---------- */
.page-releases .rl-banner {
  list-style: none;
  margin: var(--space-4) 0 var(--space-4) calc(var(--space-6) * -1);
  padding: var(--space-3) var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  display: grid;
  gap: var(--space-1);
}

.page-releases .rl-banner__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-releases .rl-banner__text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

/* ---------- 当前版本 ---------- */
.page-releases .rl-current__inner {
  display: grid;
  gap: var(--space-6);
}

.page-releases .rl-current__flag {
  margin: 0 0 var(--space-2);
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  padding: 3px var(--space-2);
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-releases .rl-current__title {
  margin: 0 0 var(--space-3);
  color: var(--color-contrast-ink);
}

.page-releases .rl-current__lede {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-releases .rl-current__body {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.85;
}

.page-releases .rl-current__body a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-releases .rl-current__facts {
  margin: 0;
  display: grid;
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-releases .rl-current__fact {
  display: grid;
  gap: 2px;
  padding-top: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  padding-bottom: var(--space-2);
}

.page-releases .rl-current__fact dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-releases .rl-current__fact dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

/* ---------- 引用写法 ---------- */
.page-releases .rl-cite__grid {
  display: grid;
  gap: var(--space-6);
}

.page-releases .rl-cite__quote {
  margin: 0;
  padding: var(--space-4) 0 var(--space-4) var(--space-4);
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface-alt);
}

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

.page-releases .rl-cite__subtitle {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-releases .rl-cite__list {
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-releases .rl-cite__list li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rl-cite__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--space-2) + 2px);
  width: var(--space-2);
  height: 2px;
  background: var(--color-accent);
}

.page-releases .rl-cite__tail {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 反馈出口 ---------- */
.page-releases .rl-feedback__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
}

.page-releases .rl-feedback__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
  counter-reset: rlfeed;
}

.page-releases .rl-feedback__item {
  padding-top: var(--space-3);
  border-top: 3px solid var(--color-primary);
  background: var(--color-surface);
  padding: var(--space-3);
}

.page-releases .rl-feedback__num {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

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

.page-releases .rl-feedback__body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 焦点与交互态 ---------- */
.page-releases a:focus-visible,
.page-releases button:focus-visible,
.page-releases summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-releases .rl-banner,
.page-releases .rl-current__fact,
.page-releases .rl-node__group {
  transition: color 120ms linear;
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 720px) {
  .page-releases .rl-hero {
    padding-top: var(--space-8);
    padding-bottom: calc(var(--space-8) + 64px);
  }

  .page-releases .rl-node__text {
    flex: 1 1 320px;
  }

  .page-releases .rl-node__tag {
    margin-left: auto;
  }

  .page-releases .rl-groups__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-releases .rl-banner {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-4);
  }

  .page-releases .rl-feedback__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-releases .rl-hero__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: var(--space-8);
  }

  .page-releases .rl-hero__stats {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    padding-left: var(--space-4);
    border-left: var(--border-thin) solid var(--color-contrast-line);
  }

  .page-releases .rl-timeline__layout {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: var(--space-6);
  }

  .page-releases .rl-timeline__axis {
    display: block;
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--color-surface-deep);
  }

  .page-releases .rl-timeline__axis img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.55;
    filter: grayscale(1) contrast(1.15);
  }

  .page-releases .rl-current__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-releases .rl-cite__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-releases .rl-hero__figure {
    font-size: calc(var(--text-figure) * 1.3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-releases .rl-index__link,
  .page-releases .rl-switch__btn,
  .page-releases .rl-node__num,
  .page-releases .rl-node__arrow,
  .page-releases .rl-banner,
  .page-releases .rl-current__fact,
  .page-releases .rl-node__group {
    transition: none;
  }
}
<<<END>>>