/* ===== 版本演进 /version/ ===== */

.page-releases .rel-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-releases .rel-kicker__mark {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-primary);
}

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

.page-releases .rel-hero__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-8);
}

.page-releases .rel-hero__stage {
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.page-releases .rel-hero__track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  min-width: 0;
}

.page-releases .rel-axis {
  display: none;
}

.page-releases .rel-hero__nums {
  display: grid;
  gap: var(--space-6);
  min-width: 0;
}

.page-releases .rel-numblock {
  display: grid;
  gap: var(--space-1);
  max-width: 40ch;
}

.page-releases .rel-numblock__value {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.page-releases .rel-numblock__unit {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

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

.page-releases .rel-numblock--a .rel-numblock__value {
  font-size: var(--text-figure);
}

.page-releases .rel-numblock--b {
  margin-left: 12%;
}

.page-releases .rel-numblock--b .rel-numblock__value {
  font-size: var(--text-2xl);
  color: var(--color-primary);
}

.page-releases .rel-numblock--c {
  margin-left: 5%;
}

.page-releases .rel-numblock--c .rel-numblock__value {
  font-size: var(--text-xl);
}

.page-releases .rel-hero__seal {
  margin: 0;
  display: grid;
  gap: var(--space-2);
  max-width: 320px;
}

.page-releases .rel-hero__seal img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-sm);
  filter: contrast(1.04) saturate(0.94);
}

.page-releases .rel-hero__seal .meta-line {
  margin: 0;
}

@media (min-width: 900px) {
  .page-releases .rel-hero__stage {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: var(--space-8);
    align-items: start;
  }

  .page-releases .rel-hero__track {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: var(--space-6);
  }

  .page-releases .rel-axis {
    display: block;
    position: relative;
    min-height: 100%;
  }

  .page-releases .rel-axis::before {
    content: "";
    position: absolute;
    top: 52px;
    bottom: 0;
    left: 50%;
    width: 1px;
    background-image: repeating-linear-gradient(
      to bottom,
      var(--color-line) 0,
      var(--color-line) 1px,
      transparent 1px,
      transparent var(--rail-scale-step)
    );
  }

  .page-releases .rel-axis__seal {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    background: var(--color-primary);
    color: var(--color-primary-ink);
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    writing-mode: vertical-rl;
    text-orientation: upright;
  }

  .page-releases .rel-numblock--b {
    margin-left: 20%;
  }

  .page-releases .rel-numblock--c {
    margin-left: 8%;
  }

  .page-releases .rel-hero__seal {
    max-width: none;
  }
}

/* ---- 三个演进阶段 ---- */

.page-releases .rel-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-8);
}

.page-releases .rel-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}

.page-releases .rel-stage__index {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.page-releases .rel-stage__body {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-releases .rel-stage__title {
  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-stage__range {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

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

.page-releases .rel-stage__note {
  margin: 0;
  max-width: var(--measure);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
  opacity: 0.72;
}

@media (min-width: 768px) {
  .page-releases .rel-stage {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }
}

/* ---- 时间线 ---- */

.page-releases .rel-timeline {
  margin-top: var(--space-6);
}

.page-releases .rel-flow {
  position: relative;
  display: grid;
  gap: var(--space-8);
  margin-top: var(--space-8);
  padding-left: var(--space-4);
  min-width: 0;
}

.page-releases .rel-flow::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: color-mix(in srgb, var(--color-ink) 24%, transparent);
}

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

.page-releases .rel-node::before {
  content: "";
  position: absolute;
  left: calc(var(--space-4) * -1);
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-ink-muted);
}

.page-releases .rel-node__index {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: color-mix(in srgb, var(--color-ink) 52%, transparent);
}

.page-releases .rel-node__body {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-releases .rel-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
}

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

.page-releases .rel-node__key {
  display: inline-block;
  min-width: 3.2em;
  margin-right: var(--space-1);
  font-family: var(--font-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink);
  opacity: 0.7;
}

.page-releases .rel-node__body .meta-line {
  max-width: var(--measure);
}

.page-releases .rel-node__toggle {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0;
  appearance: none;
  background: none;
  border: 0;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  cursor: pointer;
}

.page-releases .rel-node__toggle::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1;
}

.page-releases .rel-node__toggle[aria-expanded="true"]::after {
  content: "−";
}

.page-releases .rel-node__toggle:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-releases .rel-node .qa__panel {
  display: grid;
  gap: var(--space-2);
}

.page-releases .rel-node .qa__panel[hidden] {
  display: none;
}

.page-releases .rel-plate {
  margin: 0;
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-releases .rel-plate img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 860 / 540;
  object-fit: cover;
  border-radius: var(--radius-sm);
  filter: saturate(0.22) contrast(1.06);
}

.page-releases .rel-plate--wide img {
  aspect-ratio: 1060 / 420;
}

.page-releases .rel-plate .figure__caption {
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

@media (min-width: 768px) {
  .page-releases .rel-flow {
    padding-left: var(--space-6);
  }

  .page-releases .rel-node {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-releases .rel-node::before {
    left: calc(var(--space-6) * -1);
  }

  .page-releases .rel-plate {
    margin-left: var(--space-6);
  }
}

/* ---- 季度复核 ---- */

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

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

.page-releases .rel-step {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
}

.page-releases .rel-step__num {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-base);
}

.page-releases .rel-step__body {
  display: grid;
  gap: var(--space-1);
  min-width: 0;
}

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

.page-releases .rel-review__side {
  margin-top: var(--space-8);
}

.page-releases .rel-review__panel-title {
  margin: 0 0 var(--space-4);
  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-roles {
  margin: 0 0 var(--space-4);
  display: grid;
  gap: var(--space-3);
}

.page-releases .rel-role dt {
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

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

.page-releases .rel-roles + .meta-line {
  margin: 0;
}

@media (min-width: 640px) {
  .page-releases .rel-step {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: var(--space-4);
  }
}

@media (min-width: 900px) {
  .page-releases .rel-review__side {
    margin-top: 0;
  }
}

/* ---- 衔接 ---- */

.page-releases .rel-handoff__lede {
  margin: 0 0 var(--space-8);
}

.page-releases .rel-handoff__board {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.page-releases .rel-case {
  padding-left: var(--space-4);
  border-left: var(--border-thin) solid var(--color-primary-soft);
}

.page-releases .rel-case__label {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-releases .rel-case__text {
  margin: 0;
  max-width: 44ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-handoff__note {
  margin: 0 0 var(--space-8);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-releases .rel-exits {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin: 0 0 var(--space-8);
}

.page-releases .rel-handoff__foot {
  margin: 0;
  max-width: var(--measure);
}

.page-releases .rel-inline {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-releases .rel-inline:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

@media (min-width: 768px) {
  .page-releases .rel-handoff__board {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 599px) {
  .page-releases .rel-exits {
    flex-direction: column;
    align-items: stretch;
  }

  .page-releases .rel-exits .btn {
    text-align: center;
  }
}