/* ============================================================
   客户端版本页 · 页面作用域 .page-app-download
   ============================================================ */

.page-app-download .client-crumb {
  padding-top: var(--space-4);
}

/* ---------- 首屏：版本谱系封面 ---------- */

.page-app-download .client-hero {
  padding-bottom: var(--space-8);
}

.page-app-download .client-hero__kicker {
  margin: 0 0 var(--space-3);
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-ink-soft);
}

.page-app-download .client-hero__title {
  margin: 0;
  text-align: center;
  color: var(--color-ink);
}

.page-app-download .client-hero__seq {
  display: block;
  font-family: var(--font-mono);
  font-size: 1em;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--color-primary);
}

.page-app-download .client-hero__line {
  display: block;
  margin-top: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .client-hero__lede {
  max-width: 58ch;
  margin: var(--space-4) auto 0;
  text-align: center;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .client-hero__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin: var(--space-6) 0 0;
  padding: var(--space-4) 0;
  list-style: none;
  border-top: 3px double var(--color-line);
  border-bottom: 3px double var(--color-line);
}

.page-app-download .client-metric {
  text-align: center;
}

.page-app-download .client-metric__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1.05;
  color: var(--color-ink);
}

.page-app-download .client-metric__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
}

.page-app-download .client-hero__figure {
  margin: var(--space-6) 0 0;
}

.page-app-download .client-hero__frame {
  border: 3px double var(--color-primary-soft);
  overflow: hidden;
}

.page-app-download .client-hero__frame img,
.page-app-download .client-groups__frame img,
.page-app-download .client-prep__frame img,
.page-app-download .client-stamp__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 四组陈列 ---------- */

.page-app-download .client-groups-section {
  padding-block: var(--section-y) 0;
}

.page-app-download .client-groups__lede-figure {
  margin: 0 0 var(--space-6);
}

.page-app-download .client-groups__frame {
  border: 3px double var(--color-line);
  overflow: hidden;
}

.page-app-download .client-groups {
  display: grid;
  gap: var(--space-4);
}

.page-app-download .client-group {
  border: 3px double var(--color-line);
  background: var(--color-surface);
}

.page-app-download .client-group[open] {
  border-color: var(--color-primary-soft);
}

.page-app-download .client-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .client-group__head::-webkit-details-marker {
  display: none;
}

.page-app-download .client-group[open] .client-group__head {
  border-bottom-color: var(--color-primary);
}

.page-app-download .client-group__name::before {
  content: "";
  display: inline-block;
  width: calc(var(--space-1) * 0.75);
  height: calc(var(--space-1) * 0.75);
  margin-right: var(--space-2);
  background: var(--color-primary);
  vertical-align: 0.08em;
}

.page-app-download .client-group__count {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  flex: none;
}

.page-app-download .client-entries {
  display: grid;
  gap: var(--space-4);
  margin: 0;
  padding: var(--space-4) var(--space-3);
  list-style: none;
}

.page-app-download .client-entry {
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-app-download .client-entry__name {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-app-download .client-entry__desc {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .client-entry__meta {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-2) 0 0;
}

.page-app-download .client-entry__meta-row {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.page-app-download .client-entry__meta-key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  padding-top: 0.25em;
}

.page-app-download .client-entry__meta-val {
  margin: 0;
  color: var(--color-ink-soft);
}

/* ---------- 版本差异对照 ---------- */

.page-app-download .client-diff-section {
  padding-block: var(--section-y);
}

.page-app-download .client-diff__lede {
  margin: 0 auto var(--space-6);
  text-align: center;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .client-table-wrap {
  overflow-x: auto;
  border: 3px double var(--color-line);
  background: var(--color-surface);
}

.page-app-download .client-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-app-download .client-table th,
.page-app-download .client-table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
  line-height: 1.6;
}

.page-app-download .client-table thead th {
  background: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  white-space: nowrap;
  border-bottom: var(--border-thick) solid var(--color-primary);
}

.page-app-download .client-table tbody th {
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  white-space: nowrap;
}

.page-app-download .client-table tbody td {
  color: var(--color-ink-soft);
}

.page-app-download .client-table tbody tr.is-diff {
  background: var(--color-primary-soft);
}

.page-app-download .client-table tbody tr:hover {
  background: var(--color-highlight);
}

.page-app-download .client-table tbody tr:last-child th,
.page-app-download .client-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-app-download .client-diff__note {
  margin: var(--space-3) 0 0;
}

/* ---------- 安装准备 ---------- */

.page-app-download .client-prep-section {
  padding-block: var(--section-y-lg) var(--section-y);
}

.page-app-download .client-prep {
  display: grid;
  gap: var(--space-6);
}

.page-app-download .client-prep__lede {
  margin: var(--space-3) 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .client-checklist {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-app-download .client-check {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-left: var(--border-thick) solid var(--color-primary);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-app-download .client-check:hover {
  border-color: var(--color-primary);
}

.page-app-download .client-check input {
  flex: none;
  width: 1.1em;
  height: 1.1em;
  margin-top: 0.3em;
  accent-color: var(--color-primary);
}

.page-app-download .client-check span {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink);
}

.page-app-download .client-prep__figure {
  margin: 0;
}

.page-app-download .client-prep__frame {
  border: 3px double var(--color-primary-soft);
  overflow: hidden;
}

/* ---------- 版本时间戳 ---------- */

.page-app-download .client-stamp-section {
  padding-block: 0 var(--section-y-lg);
}

.page-app-download .client-stamp {
  display: grid;
  gap: var(--space-5, var(--space-4));
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border: 3px double var(--color-primary);
}

.page-app-download .client-stamp__lede {
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-app-download .client-stamp__copy p {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .client-stamp__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-app-download .client-stamp__figure {
  margin: 0;
}

.page-app-download .client-stamp__frame {
  border: 3px double var(--color-line);
  overflow: hidden;
}

/* ---------- 下一步 ---------- */

.page-app-download .client-next {
  padding-block: var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .client-next .section-kicker {
  color: var(--color-contrast-accent);
}

.page-app-download .client-next .section-title {
  color: var(--color-contrast-ink);
}

.page-app-download .client-next .section-rule {
  background: var(--color-contrast-accent);
}

.page-app-download .client-next__list {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-app-download .client-next__item {
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-4);
  border-left: var(--border-thick) solid var(--color-contrast-accent);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-app-download .client-next__item a {
  display: block;
  margin-top: 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-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 180ms ease, color 180ms ease;
}

.page-app-download .client-next__item a:hover,
.page-app-download .client-next__item a:focus-visible {
  border-bottom-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.page-app-download .client-next__desc {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-app-download .client-next .tag {
  display: inline-block;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-app-download .client-hero__metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-app-download .client-hero__line {
    font-size: var(--text-2xl);
  }

  .page-app-download .client-group__head {
    padding: var(--space-3) var(--space-4);
  }

  .page-app-download .client-entries {
    padding: var(--space-4);
  }

  .page-app-download .client-stamp {
    padding: var(--space-6);
  }

  .page-app-download .client-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-3);
  }
}

@media (min-width: 1000px) {
  .page-app-download .client-hero {
    padding-bottom: var(--section-y);
  }

  .page-app-download .client-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--space-3);
    align-items: start;
  }

  .page-app-download .client-prep {
    grid-template-columns: 7fr 4fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-app-download .client-prep__figure {
    position: sticky;
    top: var(--space-6);
  }

  .page-app-download .client-stamp {
    grid-template-columns: 6fr 5fr;
    gap: var(--space-6);
    align-items: center;
  }

  .page-app-download .client-hero__frame img {
    max-height: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download .client-check,
  .page-app-download .client-next__item a {
    transition: none;
  }
}
<<<END>>>

.page-app-download {
  --space-5: var(--space-8);
}