.page-app-download {
  --pd-alert-glow: 0 0 20px color-mix(in srgb, var(--color-primary) 45%, transparent);
}

.page-app-download .intro {
  padding-top: var(--space-6);
  padding-bottom: var(--space-8);
}

.page-app-download .intro__head {
  max-width: 62ch;
}

.page-app-download h1 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-3) 0;
}

.page-app-download .intro__lede {
  margin: 0;
  max-width: 60ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

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

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

/* 首屏三块不等宽色块 */
.page-app-download .version-row {
  position: relative;
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-left: var(--space-2);
}

.page-app-download .version-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: var(--radius-pill);
  background: var(--color-primary);
  box-shadow: var(--pd-alert-glow);
}

@media (min-width: 900px) {
  .page-app-download .version-row {
    grid-template-columns: 3fr 2fr 2fr;
    padding-left: var(--space-3);
  }
}

.page-app-download .vblock {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-surface-deep);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 38%, transparent);
  border-radius: var(--radius-md);
}

.page-app-download .vblock:first-child {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
}

.page-app-download .vblock__fit {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-accent);
}

.page-app-download .vblock__name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
}

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

.page-app-download .quick-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

@media (min-width: 640px) {
  .page-app-download .quick-stats {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-app-download .quick-stats .stat {
  display: grid;
  gap: var(--space-1);
}

.page-app-download .quick-stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-ink);
  text-shadow: 0 0 24px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.page-app-download .quick-stats .stat__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

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

/* 版本切换与差异对照 */
.page-app-download .tabs {
  margin-top: var(--space-6);
}

.page-app-download .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.page-app-download .tabs__panels {
  margin-top: var(--space-4);
}

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

@media (min-width: 900px) {
  .page-app-download .panel-body {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }
}

.page-app-download .table-scroll {
  overflow-x: auto;
  border-radius: var(--radius-sm);
}

.page-app-download .spec-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

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

.page-app-download .spec-table th {
  width: 30%;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
}

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

.page-app-download .spec-table tr:nth-child(even) {
  background: var(--color-surface-alt);
}

.page-app-download .spec-table tr:last-child th,
.page-app-download .spec-table tr:last-child td {
  border-bottom: none;
}

/* 安装前准备清单 */
.page-app-download .prep-split {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

@media (min-width: 900px) {
  .page-app-download .prep-split {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }
}

.page-app-download .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-app-download .check-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-app-download .check-item:first-child {
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-app-download .check-item input[type="checkbox"] {
  position: relative;
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: var(--space-2);
  height: var(--space-2);
  margin: var(--space-1) 0 0;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.page-app-download .check-item input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-app-download .check-item input[type="checkbox"]:checked {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.page-app-download .check-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 26%;
  top: 8%;
  width: 34%;
  height: 62%;
  border-right: 2px solid var(--color-contrast-surface);
  border-bottom: 2px solid var(--color-contrast-surface);
  transform: rotate(45deg);
}

.page-app-download .check-item label {
  display: grid;
  gap: var(--space-1);
  cursor: pointer;
}

.page-app-download .check-item strong {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-contrast-ink);
}

.page-app-download .check-item span {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, var(--color-contrast-surface));
}

/* 版本更新 */
.page-app-download .update-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

@media (min-width: 900px) {
  .page-app-download .update-grid {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }
}

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

.page-app-download .update-list li {
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-primary);
}

.page-app-download .update-list h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
}

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

.page-app-download .faq {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-app-download .faq details {
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-app-download .faq summary {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
}

.page-app-download .faq summary::-webkit-details-marker {
  display: none;
}

.page-app-download .faq summary::before {
  content: "+";
  display: inline-block;
  width: var(--space-2);
  font-family: var(--font-mono);
  color: var(--color-primary);
}

.page-app-download .faq details[open] summary::before {
  content: "−";
}

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

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

/* 出口 */
.page-app-download .outro {
  display: grid;
  gap: var(--space-4);
}

.page-app-download .outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-app-download .outro__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .outro__links li {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

@media (min-width: 700px) {
  .page-app-download .outro__links li {
    grid-template-columns: 2fr 3fr;
    align-items: baseline;
    gap: var(--space-3);
  }
}

.page-app-download .outro__links a {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}

.page-app-download .outro__links a:hover,
.page-app-download .outro__links a:focus-visible {
  border-bottom-color: var(--color-primary);
  color: var(--color-primary);
}

.page-app-download .outro__links span {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .outro__contact {
  margin: 0;
  max-width: var(--measure);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download .vblock,
  .page-app-download .check-item input[type="checkbox"] {
    transition: none;
  }
}