.page-app-download {
  display: block;
  background: var(--color-surface);
  color: var(--color-ink-soft);
  overflow-x: hidden;
}

/* ---------- 面包屑与首屏 ---------- */

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

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

.page-app-download .breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-ink-muted);
}

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

.page-app-download .breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}

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

.page-app-download .ad-hero {
  padding-block: var(--space-6) var(--space-8);
}

.page-app-download .ad-hero-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-app-download .tilt-tag {
  display: inline-block;
  margin: 0 0 var(--space-3);
  padding: 4px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
  transform: rotate(-6deg);
}

.page-app-download .ad-hero-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  transform: skewX(-1.5deg);
  text-wrap: balance;
}

.page-app-download .ad-hero-lead {
  max-width: 62ch;
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-hero-side {
  display: none;
}

/* ---------- 四块入口拼贴 ---------- */

.page-app-download .ad-collage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--border-thin);
  margin-top: var(--space-6);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-app-download .ad-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 164px;
  padding: var(--space-4);
  background: var(--color-surface-alt);
  transition: background-color 200ms ease-out;
}

.page-app-download .ad-tile:hover {
  background: var(--color-surface-deep);
  outline: var(--border-thick) solid var(--color-primary);
  outline-offset: -2px;
}

.page-app-download .ad-tile--web {
  isolation: isolate;
  justify-content: flex-end;
  min-height: 300px;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .ad-tile--web:hover {
  background: var(--color-contrast-surface);
}

.page-app-download .ad-tile-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.page-app-download .ad-tile-scrim {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--overlay-scrim);
}

.page-app-download .ad-tile-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .ad-tile-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-primary);
}

.page-app-download .ad-tile--web .ad-tile-kicker {
  color: var(--color-contrast-accent);
}

.page-app-download .ad-tile-name {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}

.page-app-download .ad-tile--web .ad-tile-name {
  color: var(--color-contrast-ink);
}

.page-app-download .ad-tile-fit {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

.page-app-download .ad-tile--web .ad-tile-fit {
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-app-download .ad-tile-meta {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-1) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-tile--web .ad-tile-meta {
  border-top-color: var(--color-contrast-line);
}

.page-app-download .ad-tile-meta dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-app-download .ad-tile--web .ad-tile-meta dt {
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

.page-app-download .ad-tile-meta dd {
  margin: 4px 0 0;
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ---------- 底部数字带 ---------- */

.page-app-download .ad-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--border-thin);
  margin-top: var(--space-4);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-app-download .ad-band-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface);
}

.page-app-download .ad-band-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.page-app-download .ad-band-label {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- 章节通用 ---------- */

.page-app-download .ad-block {
  padding-block: var(--section-y);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.page-app-download .ad-chapter {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.28em;
  color: var(--color-primary);
}

.page-app-download .ad-head h2 {
  max-width: 24ch;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-app-download .ad-head p {
  max-width: 64ch;
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 章 01 入口逐项 ---------- */

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

.page-app-download .ad-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-app-download .ad-entry--figure {
  padding-bottom: var(--space-6);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-entry--plain {
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-app-download .ad-entry-figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
}

.page-app-download .ad-entry-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-app-download .ad-entry-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.35;
  color: var(--color-ink);
}

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

.page-app-download .ad-fields {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-fields dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}

.page-app-download .ad-fields dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

/* ---------- 章 02 对照表 ---------- */

.page-app-download .ad-table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  -webkit-overflow-scrolling: touch;
}

.page-app-download .ad-table {
  width: 100%;
  min-width: 820px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-app-download .ad-table caption {
  padding: var(--space-3);
  text-align: left;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-table th,
.page-app-download .ad-table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  vertical-align: top;
  line-height: 1.65;
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-app-download .ad-table thead th:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
}

.page-app-download .ad-table tbody th {
  position: sticky;
  left: 0;
  z-index: 1;
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  background: var(--color-surface-alt);
  white-space: nowrap;
  border-right: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-table tbody tr:hover th,
.page-app-download .ad-table tbody tr:hover td {
  background: var(--color-primary-soft);
}

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

/* ---------- 章 03 准备 ---------- */

.page-app-download .ad-banner {
  margin: 0 0 var(--space-6);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-app-download .ad-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 18 / 5;
  object-fit: cover;
}

.page-app-download .ad-prep-list {
  display: grid;
  gap: var(--border-thin);
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-app-download .ad-prep-item {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  transition: background-color 180ms ease-out;
}

.page-app-download .ad-prep-item:hover {
  background: var(--color-surface-deep);
}

.page-app-download .ad-prep-top {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.page-app-download .ad-prep-mark {
  flex: none;
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

.page-app-download .ad-prep-mark--optional {
  color: var(--color-ink-soft);
  background: var(--color-surface-deep);
}

.page-app-download .ad-prep-title {
  margin: 0;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-app-download .ad-prep-item p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

.page-app-download .ad-blind {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-app-download .ad-blind-card {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-left: var(--border-thick) solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.page-app-download .ad-blind-card h3 {
  margin: 0 0 var(--space-1);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-app-download .ad-blind-card p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

/* ---------- 章 04 获取方式 ---------- */

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

.page-app-download .ad-get-row {
  display: grid;
  gap: var(--space-1);
  padding-bottom: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-get-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-app-download .ad-get-key {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

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

/* ---------- 章 05 支持路径 ---------- */

.page-app-download .ad-paths {
  display: grid;
  gap: var(--border-thin);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-app-download .ad-path {
  display: block;
  padding: var(--space-4);
  background: var(--color-surface);
  color: inherit;
  text-decoration: none;
  transition: background-color 180ms ease-out;
}

.page-app-download .ad-path:hover,
.page-app-download .ad-path:focus-visible {
  background: var(--color-highlight);
}

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

.page-app-download .ad-path p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

.page-app-download .ad-path-go {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

/* ---------- 收尾出口 ---------- */

.page-app-download .ad-outro {
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-app-download .ad-outro a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
}

.page-app-download .ad-outro a:hover {
  border-bottom-color: var(--color-primary);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-app-download .ad-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-app-download .ad-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-app-download .ad-get-row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: baseline;
  }
}

@media (min-width: 800px) {
  .page-app-download .ad-prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-app-download .ad-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-app-download .ad-entry--figure {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-app-download .ad-entry--figure.ad-entry--flip {
    grid-template-columns: minmax(0, 1fr) 248px;
  }

  .page-app-download .ad-entry--flip .ad-entry-figure {
    order: 2;
  }

  .page-app-download .ad-entry--plain {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
    padding: var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-app-download .ad-hero-head {
    grid-template-columns: minmax(0, 1fr) 88px;
    gap: var(--space-6);
  }

  .page-app-download .ad-hero-side {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
    padding-top: var(--space-2);
  }

  .page-app-download .vertical-tag {
    padding: var(--space-2) 0 var(--space-2) var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.4em;
    color: var(--color-primary);
    border-left: var(--border-thin) solid var(--color-line);
    writing-mode: vertical-rl;
  }

  .page-app-download .ad-collage {
    grid-template-columns: 1.5fr 1fr 0.95fr;
    grid-template-rows: auto auto;
    grid-template-areas:
      "web web desk"
      "mob emb desk";
  }

  .page-app-download .ad-tile--web {
    grid-area: web;
  }

  .page-app-download .ad-tile--desk {
    grid-area: desk;
  }

  .page-app-download .ad-tile--mob {
    grid-area: mob;
  }

  .page-app-download .ad-tile--emb {
    grid-area: emb;
  }

  .page-app-download .ad-tile--web .ad-tile-name {
    font-size: var(--text-3xl);
  }
}