.page-app-download {
  --ad-cell-pad: var(--space-4);
  --ad-grid-line: 56px;
}

/* ---------- 面包屑 ---------- */
.page-app-download .crumbs {
  padding-top: var(--space-4);
  padding-bottom: var(--space-2);
}
.page-app-download .crumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
}
.page-app-download .crumbs-link {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-line);
}
.page-app-download .crumbs-link:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.page-app-download .crumbs-sep {
  color: var(--color-line);
}
.page-app-download .crumbs-current {
  color: var(--color-primary);
}

/* ---------- 首屏 ---------- */
.page-app-download .app-hero {
  position: relative;
  padding-block: var(--space-6) var(--section-y);
  overflow: hidden;
}
.page-app-download .app-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--color-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-line) 1px, transparent 1px);
  background-size: var(--ad-grid-line) var(--ad-grid-line);
  opacity: 0.32;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0) 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0) 88%);
}
.page-app-download .app-hero .shell {
  position: relative;
  z-index: 1;
}
.page-app-download .hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: end;
}
.page-app-download .hero-copy {
  max-width: 46ch;
}
.page-app-download .mono-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
}
.page-app-download .hero-title {
  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);
  margin: 0 0 var(--space-4);
  text-wrap: balance;
}
.page-app-download .hero-title::after {
  content: "";
  display: block;
  width: 84px;
  height: 3px;
  margin-top: var(--space-4);
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
}
.page-app-download .lede {
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-3);
}
.page-app-download .hero-fine {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
  padding-left: var(--space-3);
  border-left: 2px dotted var(--color-line);
  margin: 0;
}
.page-app-download .hero-visual {
  margin: 0;
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
  padding: var(--space-2);
}
.page-app-download .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 首屏数字组 ---------- */
.page-app-download .hero-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: var(--space-8);
  background: var(--color-line);
  border: 1px solid var(--color-line);
}
.page-app-download .fig-cell {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--ad-cell-pad);
  background: var(--color-surface);
}
.page-app-download .fig-cell-strong {
  background: var(--color-contrast-surface);
}
.page-app-download .fig-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}
.page-app-download .fig-cell-strong .fig-num {
  color: var(--color-contrast-ink);
}
.page-app-download .fig-unit {
  font-size: var(--text-xl);
  margin-left: 2px;
}
.page-app-download .fig-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}
.page-app-download .fig-cell-strong .fig-label {
  color: var(--color-contrast-ink);
}
.page-app-download .fig-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.page-app-download .fig-cell-strong .fig-note {
  color: var(--color-contrast-accent);
}

/* ---------- 区块头 ---------- */
.page-app-download .sec-head {
  margin-bottom: var(--space-6);
}

/* ---------- 目录 ---------- */
.page-app-download .catalog {
  display: grid;
  gap: var(--space-8);
}
.page-app-download .catalog-group {
  border-top: var(--border-thick) solid var(--color-primary);
  padding-top: var(--space-3);
}
.page-app-download .group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
}
.page-app-download .group-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
}
.page-app-download .group-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: 0;
  flex: 1 1 auto;
}
.page-app-download .entry-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px dotted var(--color-line);
}
.page-app-download .entry {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px dotted var(--color-line);
  align-items: start;
}
.page-app-download .entry-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  padding-top: 2px;
}
.page-app-download .entry-body {
  min-width: 0;
}
.page-app-download .entry-title {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-1);
  display: inline-block;
  border-bottom: 2px solid transparent;
  transition: border-color 0.18s ease, color 0.18s ease;
}
.page-app-download .entry:hover .entry-title {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.page-app-download .entry-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0;
  max-width: var(--measure);
}

/* ---------- 功能分区 ---------- */
.page-app-download .feature {
  border-top: 1px dotted var(--color-line);
}
.page-app-download .feature-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
.page-app-download .feature-media {
  margin: 0;
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
  padding: var(--space-2);
}
.page-app-download .feature-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-app-download .figure-caption {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.page-app-download .feature-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}
.page-app-download .feature-copy p {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
}
.page-app-download .inline-link {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary);
}
.page-app-download .inline-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.page-app-download .inline-link-dark {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}
.page-app-download .inline-link-dark:hover {
  color: var(--color-contrast-ink);
  border-bottom-color: var(--color-contrast-ink);
}

/* ---------- 事实列表 ---------- */
.page-app-download .fact-list {
  margin: 0;
  border-top: 1px dotted var(--color-line);
}
.page-app-download .fact {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px dotted var(--color-line);
}
.page-app-download .fact dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  padding-top: 3px;
}
.page-app-download .fact dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 刻度列表 ---------- */
.page-app-download .tick-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.page-app-download .tick-list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  padding-bottom: var(--space-3);
  border-bottom: 1px dotted var(--color-line);
}
.page-app-download .tick-num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

/* ---------- 安装准备 ---------- */
.page-app-download .prepare-grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}
.page-app-download .prepare-list {
  display: grid;
  gap: var(--space-2);
}
.page-app-download .step-list {
  margin: 0;
  padding-left: 1.4em;
  display: grid;
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-app-download .prepare-media {
  margin: 0;
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
  padding: var(--space-2);
}
.page-app-download .prepare-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 边界面板 ---------- */
.page-app-download .boundary-panel {
  position: relative;
  padding: var(--space-6) var(--space-4);
  border: 1px solid var(--color-contrast-line);
}
.page-app-download .boundary-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 96px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-contrast-accent) 0%, var(--color-accent) 100%);
}
.page-app-download .coord-on-dark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}
.page-app-download .boundary-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-3);
}
.page-app-download .boundary-lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
}
.page-app-download .boundary-grid {
  display: grid;
  gap: 1px;
  background: var(--color-contrast-line);
  border: 1px solid var(--color-contrast-line);
}
.page-app-download .boundary-cell {
  background: var(--color-contrast-surface);
  padding: var(--space-4);
}
.page-app-download .boundary-cell h3 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
}
.page-app-download .boundary-cell p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}
.page-app-download .boundary-back {
  margin: var(--space-6) 0 0;
  font-size: var(--text-sm);
}

/* ---------- 展开组件微调 ---------- */
.page-app-download .expander {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
}
.page-app-download .expander-body {
  padding: var(--space-3) var(--space-4) var(--space-4);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-app-download .hero-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-app-download .boundary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-app-download .prepare-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }
  .page-app-download .boundary-panel {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 960px) {
  .page-app-download .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }
  .page-app-download .feature-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: var(--space-8);
  }
  .page-app-download .feature-reverse .feature-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-app-download .feature-reverse .feature-copy {
    order: 1;
  }
  .page-app-download .feature-reverse .feature-media {
    order: 2;
  }
  .page-app-download .entry {
    grid-template-columns: 56px minmax(0, 1fr);
  }
  .page-app-download .catalog-group {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: var(--space-6);
  }
  .page-app-download .group-head {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    position: sticky;
    top: var(--space-6);
  }
  .page-app-download .entry-list {
    margin-top: 0;
  }
}

@media (min-width: 1200px) {
  .page-app-download .fig-cell {
    padding: var(--space-6) var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download .entry-title,
  .page-app-download .inline-link {
    transition: none;
  }
}