.page-app-download .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: var(--space-3) 0 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-app-download .breadcrumbs li + li::before {
  content: "/";
  margin-right: var(--space-1);
  color: var(--color-line);
}

.page-app-download .breadcrumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.page-app-download .breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.page-app-download .breadcrumbs [aria-current="page"] {
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

/* ---------- 首屏 ---------- */

.page-app-download .hero {
  background: var(--color-surface);
  padding: var(--space-4) 0 var(--section-y);
}

.page-app-download .hero-inner {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

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

.page-app-download .hero-lead {
  margin-top: var(--space-4);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-app-download .hero-figures {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .hero-figure {
  display: grid;
  gap: var(--space-1);
}

.page-app-download .hero-figure .figure-num {
  color: var(--color-primary);
  display: block;
}

.page-app-download .hero-figure:nth-of-type(2) .figure-num {
  color: var(--color-accent);
}

.page-app-download .hero-figure-label {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-app-download .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-app-download .hero-visual {
  display: flex;
  justify-content: center;
}

.page-app-download .device-stage {
  position: relative;
  width: 100%;
  max-width: calc(var(--container) * 0.41);
  aspect-ratio: 1 / 0.94;
  margin-inline: auto;
}

.page-app-download .stage-ring {
  position: absolute;
  left: -6%;
  top: 8%;
  width: 44%;
  aspect-ratio: 1 / 1;
  background: var(--color-highlight);
  border-radius: var(--radius-pill);
}

.page-app-download .device {
  position: absolute;
  box-sizing: border-box;
  border: var(--border-thick) solid var(--color-contrast-surface);
  background: var(--color-surface);
  border-radius: var(--space-2);
}

.page-app-download .device-laptop {
  left: 0;
  bottom: 8%;
  width: 84%;
  padding: var(--space-2);
  transform: rotate(-5deg);
  z-index: 1;
}

.page-app-download .device-laptop .device-screen {
  aspect-ratio: 16 / 10;
  background: var(--color-contrast-surface);
  border-radius: calc(var(--space-1) * 1.5);
  padding: var(--space-2);
  display: grid;
  gap: var(--space-1);
  align-content: center;
}

.page-app-download .device-foot {
  display: block;
  width: 40%;
  height: var(--space-1);
  margin: var(--space-1) auto 0;
  background: var(--color-contrast-surface);
  border-radius: var(--radius-pill);
}

.page-app-download .device-phone {
  right: 0;
  top: 2%;
  width: 36%;
  padding: calc(var(--space-1) * 1.5);
  background: var(--color-primary);
  border-radius: var(--space-4);
  transform: rotate(6deg);
  z-index: 2;
}

.page-app-download .device-phone .device-screen {
  aspect-ratio: 9 / 18;
  background: var(--color-primary-soft);
  border-radius: var(--space-3);
  padding: var(--space-2) calc(var(--space-1) * 1.5);
  display: grid;
  gap: var(--space-1);
  align-content: start;
}

.page-app-download .ui-bar {
  display: block;
  width: 68%;
  height: calc(var(--space-1) / 2);
  border-radius: var(--radius-pill);
  background: var(--color-contrast-accent);
}

.page-app-download .ui-bar--b {
  width: 44%;
  background: var(--color-primary);
}

.page-app-download .ui-bar--short {
  width: 52%;
  background: var(--color-primary);
}

.page-app-download .ui-bar--tiny {
  width: 30%;
  background: var(--color-accent);
}

.page-app-download .ui-row {
  display: block;
  width: 100%;
  height: calc(var(--space-2) * 1.2);
  border-radius: var(--space-1);
  background: var(--color-contrast-line);
}

.page-app-download .ui-row--short {
  width: 72%;
}

.page-app-download .ui-dot {
  display: block;
  width: var(--space-3);
  height: var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

/* ---------- 章节头 ---------- */

.page-app-download .deck-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.page-app-download .deck-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* ---------- 分段切换与面板 ---------- */

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

.page-app-download .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .tab {
  appearance: none;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease, border-color 200ms ease;
}

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

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

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

.page-app-download .tab-panel {
  padding-top: var(--space-6);
}

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

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

.page-app-download .panel-title {
  margin: var(--space-2) 0 var(--space-4);
  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 .fact-list {
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.page-app-download .fact-row {
  display: grid;
  gap: var(--space-1);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .fact-row dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-app-download .fact-row dd {
  margin: 0;
  color: var(--color-ink);
}

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

.page-app-download .panel-figure .image-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-app-download .fig-note {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 对照表 ---------- */

.page-app-download .compare-lead {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
  color: var(--color-ink-soft);
}

.page-app-download .table-scroll {
  overflow-x: auto;
}

.page-app-download .diff-table {
  width: 100%;
  min-width: calc(var(--container) * 0.78);
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-app-download .diff-table caption {
  text-align: left;
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

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

.page-app-download .diff-table thead th {
  background: var(--color-surface-deep);
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

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

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

.page-app-download .cell-chip {
  display: inline-block;
  padding: calc(var(--space-1) / 2) var(--space-2);
  background: var(--color-primary-soft);
  color: var(--color-ink);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
}

/* ---------- 准备清单 ---------- */

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

.page-app-download .section-deep .eyebrow {
  color: var(--color-contrast-accent);
}

.page-app-download .section-deep .deck-meta {
  color: var(--color-contrast-accent);
}

.page-app-download .prepare-lead {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
  color: var(--color-contrast-ink);
}

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

.page-app-download .prepare-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: calc(var(--space-1) * 1.5);
}

.page-app-download .prepare-index {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  color: var(--color-contrast-accent);
}

.page-app-download .prepare-title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-app-download .prepare-body p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}

/* ---------- 下一步 ---------- */

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

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

.page-app-download .next-item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: calc(var(--space-1) * 1.5);
  text-decoration: none;
  color: var(--color-ink);
  transition: background-color 200ms ease, border-color 200ms ease;
}

.page-app-download .next-item a:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-app-download .next-item a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

.page-app-download .next-index {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  color: var(--color-primary);
}

.page-app-download .next-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-app-download .next-text {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-app-download .fact-row {
    grid-template-columns: calc(var(--space-8) * 2) minmax(0, 1fr);
    gap: var(--space-3);
  }
}

@media (min-width: 760px) {
  .page-app-download .prepare-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3) var(--space-6);
  }
}

@media (min-width: 880px) {
  .page-app-download .panel-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-8);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-app-download .hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: var(--space-8);
  }

  .page-app-download .next-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--space-8);
    align-items: start;
  }
}

@media (max-width: 760px) {
  .page-app-download .table-scroll {
    overflow-x: visible;
  }

  .page-app-download .diff-table {
    min-width: 0;
  }

  .page-app-download .diff-table,
  .page-app-download .diff-table tbody,
  .page-app-download .diff-table tr,
  .page-app-download .diff-table th,
  .page-app-download .diff-table td {
    display: block;
    width: 100%;
  }

  .page-app-download .diff-table caption {
    display: block;
  }

  .page-app-download .diff-table thead {
    display: none;
  }

  .page-app-download .diff-table tr {
    margin-bottom: var(--space-3);
    border: var(--border-thin) solid var(--color-line);
    border-radius: calc(var(--space-1) * 1.5);
    background: var(--color-surface);
    overflow: hidden;
  }

  .page-app-download .diff-table tbody th {
    background: var(--color-surface-deep);
    padding: var(--space-2) var(--space-3);
    white-space: normal;
  }

  .page-app-download .diff-table tbody td {
    padding: var(--space-2) var(--space-3);
  }

  .page-app-download .diff-table tbody td + td {
    border-top: var(--border-thin) solid var(--color-line);
  }

  .page-app-download .diff-table tbody td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: calc(var(--space-1) / 2);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
  }
}

@media (max-width: 420px) {
  .page-app-download .device-stage {
    aspect-ratio: 1 / 1.05;
  }

  .page-app-download .device-laptop {
    width: 88%;
  }

  .page-app-download .device-phone {
    width: 40%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download .tab,
  .page-app-download .next-item a {
    transition: none;
  }
}