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

.page-app-download-android .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-app-download-android .breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.page-app-download-android .breadcrumb-list li + li::before {
  content: "/";
  color: var(--color-line);
}

.page-app-download-android .breadcrumb-list a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

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

.page-app-download-android .breadcrumb-list a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* 首屏 */

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

.page-app-download-android .android-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
}

.page-app-download-android .android-intro-text h1 {
  margin: var(--space-3) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-app-download-android .android-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download-android .android-figure {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space-1) / 2);
}

.page-app-download-android .android-figure-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.page-app-download-android .android-figure-label {
  font-size: var(--text-sm);
  line-height: calc(var(--leading-body) * 0.8);
  color: var(--color-ink-muted);
}

.page-app-download-android .android-intro-figure {
  margin: 0;
  border-left: var(--border-thin) solid var(--color-primary);
}

.page-app-download-android .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* 单列窄阅读：左侧留白，右侧内容 */

.page-app-download-android .android-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  row-gap: var(--space-6);
}

.page-app-download-android .section-head .section-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-app-download-android .section-head .lead {
  margin-top: var(--space-3);
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-app-download-android .prose 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-android .prose p:last-child {
  margin-bottom: 0;
}

/* 情境列表 */

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

.page-app-download-android .scene-item {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download-android .scene-item .tag {
  justify-self: start;
}

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

/* 步骤 */

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

.page-app-download-android .step-item {
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-app-download-android .step-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-app-download-android .step-summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-app-download-android .step-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-app-download-android .step-title {
  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-app-download-android .step-mark {
  position: relative;
  width: 16px;
  height: 16px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  align-self: center;
}

.page-app-download-android .step-mark::before,
.page-app-download-android .step-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--color-ink-soft);
  transform: translate(-50%, -50%);
}

.page-app-download-android .step-mark::before {
  width: 8px;
  height: 1px;
}

.page-app-download-android .step-mark::after {
  width: 1px;
  height: 8px;
  transition: opacity 160ms ease;
}

.page-app-download-android .step-item[open] .step-mark::after {
  opacity: 0;
}

.page-app-download-android .step-item[open] .step-summary .step-title {
  color: var(--color-primary);
}

.page-app-download-android .step-body {
  padding-bottom: var(--space-4);
}

.page-app-download-android .step-body 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-android .step-body a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
  transition: border-color 160ms ease;
}

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

.page-app-download-android .step-body a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-app-download-android .android-step-figure,
.page-app-download-android .android-prep-figure {
  margin: 0;
  border-left: var(--border-thin) solid var(--color-primary);
}

/* 版本对照 */

.page-app-download-android .version-wrap {
  overflow-x: auto;
}

.page-app-download-android .version-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-app-download-android .version-table th,
.page-app-download-android .version-table td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-3) var(--space-3) var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  line-height: calc(var(--leading-body) * 0.85);
}

.page-app-download-android .version-table thead th {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  border-bottom-color: var(--color-ink-muted);
}

.page-app-download-android .version-table tbody th {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  white-space: nowrap;
}

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

.page-app-download-android .version-table .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-app-download-android .android-note {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: calc(var(--leading-body) * 0.8);
  color: var(--color-ink-muted);
}

.page-app-download-android .android-note--deep {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* 准备清单 */

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

.page-app-download-android .prep-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download-android .prep-check {
  flex: none;
  width: 18px;
  height: 18px;
  margin: 6px 0 0;
  accent-color: var(--color-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

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

.page-app-download-android .prep-body {
  display: grid;
  gap: calc(var(--space-1) / 2);
  cursor: pointer;
}

.page-app-download-android .prep-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  transition: color 160ms ease;
}

.page-app-download-android .prep-text {
  font-size: var(--text-base);
  line-height: calc(var(--leading-body) * 0.85);
  color: var(--color-ink-soft);
  transition: color 160ms ease;
}

.page-app-download-android .prep-check:hover ~ .prep-body .prep-title {
  color: var(--color-primary);
}

.page-app-download-android .prep-check:checked ~ .prep-body .prep-title {
  text-decoration: line-through;
  text-decoration-color: var(--color-primary);
  text-decoration-thickness: 1px;
}

.page-app-download-android .prep-check:checked ~ .prep-body .prep-text {
  color: var(--color-ink-muted);
}

/* 深墨收束区 */

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

.page-app-download-android .section--deep .lead {
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-app-download-android .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-app-download-android .next-card {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-left: 2px solid var(--color-contrast-accent);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color 160ms ease;
}

.page-app-download-android .next-card:hover {
  background: var(--color-surface-deep);
}

.page-app-download-android .next-card:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-app-download-android .next-card-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-app-download-android .next-card-title {
  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-app-download-android .next-card-text {
  font-size: var(--text-sm);
  line-height: calc(var(--leading-body) * 0.85);
  color: var(--color-ink-soft);
}

/* 断点 */

@media (min-width: 620px) {
  .page-app-download-android .android-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-app-download-android .step-body {
    padding-left: calc(var(--space-6) + var(--space-1));
  }

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

@media (min-width: 860px) {
  .page-app-download-android .android-intro {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-app-download-android .android-intro-text h1 {
    font-size: var(--text-3xl);
  }

  .page-app-download-android .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-app-download-android .android-column {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: var(--gutter);
  }

  .page-app-download-android .android-column > * {
    grid-column: 4 / -1;
  }

  .page-app-download-android .android-column > .android-wide {
    grid-column: 1 / -1;
  }
}