.page-app-download {
  background: var(--color-surface);
  color: var(--color-ink);
  padding-bottom: var(--space-8);
}

/* ---------- 首屏 ---------- */

.page-app-download .client-hero {
  padding-top: var(--space-4);
  padding-bottom: var(--section-y);
}

.page-app-download .hero-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin: var(--space-4) 0 var(--space-2);
}

.page-app-download .title-display {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  word-break: break-word;
}

.page-app-download .hero-lead {
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-6);
}

.page-app-download .hero-block {
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.page-app-download .hero-block-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-app-download .ledger-cap {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-3);
}

.page-app-download .ledger-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px var(--space-3);
}

.page-app-download .ledger-list li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
  padding: 4px 0;
  border-bottom: 1px solid var(--color-contrast-line);
}

.page-app-download .ledger-list li::before {
  content: "";
  flex: none;
  width: 12px;
  height: 1px;
  background: var(--color-contrast-line);
}

.page-app-download .hero-figures {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .figure-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--color-contrast-line);
}

.page-app-download .figure-row dt {
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-app-download .figure-row dd {
  margin: 0;
}

.page-app-download .hero-figure {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--color-contrast-accent);
}

.page-app-download .figures-note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.76;
}

/* ---------- 分组通用 ---------- */

.page-app-download .group-section {
  padding-top: var(--section-y);
}

.page-app-download .page-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-line);
}

.page-app-download .group-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.page-app-download .group-title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .group-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  margin-left: auto;
}

.page-app-download .group-toggle {
  flex: 0 0 auto;
  appearance: none;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font: inherit;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  padding: 6px var(--space-2);
  cursor: pointer;
  transition: border-color 160ms ease-out, color 160ms ease-out;
}

.page-app-download .group-toggle:hover,
.page-app-download .group-toggle:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  outline: none;
}

.page-app-download .page-group:not([data-open="true"]) .page-group-body {
  display: none;
}

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

.page-app-download .group-lead {
  max-width: var(--measure);
  margin: 0 0 var(--space-4);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 版本条目 ---------- */

.page-app-download .v-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-app-download .v-entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .v-entry {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 160ms ease-out, transform 160ms ease-out;
}

.page-app-download .v-entry:hover {
  border-left-color: var(--color-accent);
  transform: translateY(-2px);
}

.page-app-download .v-entry-idx {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  padding-top: 2px;
}

.page-app-download .v-entry-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.32;
  letter-spacing: 0.015em;
  color: var(--color-ink);
}

.page-app-download .v-entry-desc {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 图片 ---------- */

.page-app-download .v-figure {
  margin: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-alt);
}

.page-app-download .v-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--color-surface-deep);
}

.page-app-download .v-figure figcaption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
  border-top: 1px solid var(--color-line);
}

.page-app-download .v-figure--wide,
.page-app-download .v-figure--mid {
  margin-top: var(--space-4);
}

/* ---------- 平台差异对照表 ---------- */

.page-app-download .table-scroll {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-app-download .diff-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-app-download .diff-table caption {
  caption-side: top;
  text-align: left;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  border-bottom: 1px solid var(--color-line);
}

.page-app-download .diff-table thead th {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  background: var(--color-surface-deep);
  border-bottom: 1px solid var(--color-line);
  white-space: nowrap;
}

.page-app-download .diff-table tbody th,
.page-app-download .diff-table tbody td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-3);
  line-height: 1.65;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-line);
}

.page-app-download .diff-table tbody th {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  white-space: nowrap;
}

.page-app-download .diff-table tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--color-surface-deep) 48%, transparent);
}

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

/* ---------- 安装准备 ---------- */

.page-app-download .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-app-download .prep-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
}

.page-app-download .prep-box {
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--color-ink-muted);
  border-radius: var(--radius-sm);
  background: transparent;
}

.page-app-download .prep-text {
  min-width: 0;
}

.page-app-download .prep-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}

.page-app-download .prep-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.32;
  color: var(--color-ink);
}

.page-app-download .prep-desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 失败情形 ---------- */

.page-app-download .fail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-app-download .fail-item {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-app-download .fail-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.page-app-download .fail-idx {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-app-download .fail-symptom {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.34;
  color: var(--color-ink);
}

.page-app-download .fail-action {
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-highlight);
  color: var(--color-ink);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

.page-app-download .fail-action-label {
  display: inline-block;
  margin-right: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-app-download .fail-action a,
.page-app-download .fail-coda a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-app-download .fail-coda {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 版本对照 ---------- */

.page-app-download .version-section .section-head {
  margin-bottom: var(--space-4);
}

.page-app-download .section-intro {
  max-width: var(--measure);
  margin: var(--space-2) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .version-tabs .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.page-app-download .version-tabs .tab {
  appearance: none;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  padding: 6px var(--space-2);
  cursor: pointer;
  transition: border-color 160ms ease-out, color 160ms ease-out, background 160ms ease-out;
}

.page-app-download .version-tabs .tab:hover {
  color: var(--color-ink);
  border-color: var(--color-ink-muted);
}

.page-app-download .version-tabs .tab[aria-selected="true"] {
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.page-app-download .version-tabs .tab:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-app-download .version-tabs .tab-panel {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-app-download .version-tabs .tab-panel[hidden] {
  display: none;
}

.page-app-download .version-facts {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

.page-app-download .version-facts > div {
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-line);
}

.page-app-download .version-facts > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-app-download .version-facts dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.page-app-download .version-facts dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

/* ---------- 客服区 ---------- */

.page-app-download .contact-section {
  padding-top: var(--section-y);
}

.page-app-download .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

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

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

.page-app-download .contact-lead a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-app-download .contact-panel {
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.page-app-download .contact-panel-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.32;
  color: var(--color-ink);
}

.page-app-download .contact-list {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .contact-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-line);
}

.page-app-download .contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-app-download .contact-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-app-download .contact-value {
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink);
  word-break: break-word;
}

.page-app-download .contact-value.num {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.page-app-download .contact-note {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .contact-note--plain a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-app-download .hero-block {
    padding: var(--space-4) var(--space-6);
  }

  .page-app-download .hero-block-inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: var(--space-6);
  }

  .page-app-download .ledger-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-app-download .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-app-download .version-facts > div {
    padding-bottom: 0;
    padding-right: var(--space-3);
    border-bottom: 0;
    border-right: 1px solid var(--color-line);
  }

  .page-app-download .version-facts > div:last-child {
    padding-right: 0;
    border-right: 0;
  }

  .page-app-download .contact-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-app-download .v-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
    align-items: start;
  }

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

  .page-app-download .v-figure--wide,
  .page-app-download .v-figure--mid {
    position: static;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-app-download .v-entry,
  .page-app-download .group-toggle,
  .page-app-download .version-tabs .tab {
    transition: none;
  }

  .page-app-download .v-entry:hover {
    transform: none;
  }
}