.page-app-download {
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

/* ---------- 面包屑 ---------- */
.page-app-download .crumbs {
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}
.page-app-download .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}
.page-app-download .crumbs li + li::before {
  content: "/";
  margin-right: var(--space-1);
  color: var(--color-surface-deep);
}
.page-app-download .crumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
}
.page-app-download .crumbs a:hover,
.page-app-download .crumbs a:focus-visible {
  color: var(--color-primary);
}
.page-app-download .crumbs [aria-current="page"] {
  color: var(--color-ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-app-download .hero {
  padding-bottom: var(--space-8);
  background: linear-gradient(180deg, var(--color-surface-alt) 0%, var(--color-surface) 80%);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-app-download .hero-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  padding-top: var(--space-4);
}
.page-app-download .hero-copy {
  grid-column: 1 / -1;
}
.page-app-download .hero-copy .eyebrow {
  color: var(--color-accent);
}
.page-app-download .hero-copy h1 {
  margin: var(--space-2) 0 var(--space-3);
  max-width: 20ch;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.05;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.page-app-download .hero-copy .lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}
.page-app-download .hero-figures {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-contrast-surface);
  border-left: calc(var(--border-thin) * 3) solid var(--color-contrast-accent);
  border-radius: var(--radius-md);
}
.page-app-download .figure-item {
  display: grid;
  gap: var(--space-1);
  align-content: start;
}
.page-app-download .figure-num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}
.page-app-download .figure-label {
  font-size: var(--text-xs);
  line-height: 1.35;
  color: var(--color-contrast-ink);
  opacity: 0.82;
}
.page-app-download .hero-media {
  margin-top: var(--space-6);
}
.page-app-download .hero-media figure {
  margin: 0;
}
.page-app-download .hero-media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
}
.page-app-download .hero-media-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  max-height: 400px;
  object-fit: cover;
}
.page-app-download .hero-media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
  background: linear-gradient(128deg,
    color-mix(in srgb, var(--color-primary) 48%, transparent) 0%,
    color-mix(in srgb, var(--color-contrast-surface) 34%, transparent) 52%,
    color-mix(in srgb, var(--color-accent) 40%, transparent) 100%);
}
.page-app-download .media-caption {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.4;
  color: var(--color-ink-muted);
}

/* ---------- 通用分区 ---------- */
.page-app-download .pg {
  padding-block: var(--section-y);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-app-download .pg--tint {
  background: var(--color-surface-alt);
}
.page-app-download .pg-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-app-download .pg-head h2 {
  margin: 0;
  max-width: 26ch;
  font-family: var(--font-heading);
  font-size: clamp(var(--text-xl), 3.2vw, var(--text-3xl));
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.page-app-download .pg-head p {
  margin: 0;
  max-width: 68ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-app-download .pg-tail {
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}
.page-app-download .pg-tail a,
.page-app-download .scene-links a,
.page-app-download .boundary a,
.page-app-download .disclosure-panel a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-app-download .pg-tail a:hover,
.page-app-download .scene-links a:hover,
.page-app-download .boundary a:hover,
.page-app-download .disclosure-panel a:hover {
  color: var(--color-focus);
}

/* ---------- 获取方式总览 ---------- */
.page-app-download .access-list {
  display: grid;
  border-top: var(--border-thin) solid var(--color-line);
}
.page-app-download .access-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  padding-block: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-app-download .access-num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}
.page-app-download .access-title {
  margin: 0 0 var(--space-1);
  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 .access-desc {
  margin: 0;
  max-width: 64ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-app-download .access-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 版本差异对照 ---------- */
.page-app-download .version-head {
  gap: var(--space-4);
}
.page-app-download .version-media {
  margin: 0;
}
.page-app-download .version-media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-contrast-surface);
}
.page-app-download .version-media-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}
.page-app-download .version-media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
  background: linear-gradient(200deg,
    color-mix(in srgb, var(--color-primary) 44%, transparent) 0%,
    color-mix(in srgb, var(--color-accent) 30%, transparent) 100%);
}
.page-app-download .table-scroll {
  overflow-x: auto;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.page-app-download .version-matrix {
  width: 100%;
  min-width: 800px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.page-app-download .version-matrix caption {
  text-align: left;
}
.page-app-download .version-matrix th,
.page-app-download .version-matrix td {
  padding: var(--space-2);
  text-align: left;
  vertical-align: top;
  line-height: 1.45;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-app-download .version-matrix thead th {
  padding-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-ink-soft);
  white-space: nowrap;
  background: var(--color-surface-deep);
  border-bottom: var(--border-thin) solid var(--color-primary);
}
.page-app-download .col-idx {
  display: block;
  margin-bottom: 2px;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}
.page-app-download .version-matrix tbody tr:not(.matrix-group) > :first-child {
  width: 170px;
  font-weight: 600;
  color: var(--color-ink);
}
.page-app-download .version-matrix tbody tr:nth-child(even):not(.matrix-group) td {
  background: var(--color-surface-alt);
}
.page-app-download .version-matrix tbody tr:not(.matrix-group):hover th,
.page-app-download .version-matrix tbody tr:not(.matrix-group):hover td {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}
.page-app-download .matrix-group th {
  padding-block: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  background: var(--color-surface-deep);
}
.page-app-download .matrix-note {
  margin: var(--space-3) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 安装准备清单 ---------- */
.page-app-download .prep-steps {
  display: grid;
  gap: var(--space-2);
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
}
.page-app-download .prep-steps li {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-deep);
  border-left: calc(var(--border-thin) * 3) solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink);
}
.page-app-download .step-num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}
.page-app-download .prep-grid {
  display: grid;
  gap: var(--space-4);
}
.page-app-download .prep-panels {
  display: grid;
  align-content: start;
}
.page-app-download .disclosure {
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-app-download .disclosure:first-child {
  border-top: var(--border-thin) solid var(--color-line);
}
.page-app-download .disclosure-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  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 .disclosure-btn:hover {
  color: var(--color-primary);
}
.page-app-download .disclosure-btn:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}
.page-app-download .disclosure-btn::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-accent);
}
.page-app-download .disclosure-btn[aria-expanded="true"]::after {
  content: "\2013";
}
.page-app-download .disclosure-panel {
  padding-bottom: var(--space-3);
}
.page-app-download .disclosure-panel ul {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-app-download .disclosure-panel strong {
  color: var(--color-ink);
  font-weight: 600;
}
.page-app-download .prep-media {
  margin: 0;
}
.page-app-download .prep-media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
}
.page-app-download .prep-media-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}
.page-app-download .prep-media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
  background: linear-gradient(160deg,
    color-mix(in srgb, var(--color-primary) 38%, transparent) 0%,
    color-mix(in srgb, var(--color-contrast-surface) 28%, transparent) 100%);
}

/* ---------- 适用设备与场景 ---------- */
.page-app-download .scene-grid {
  display: grid;
  gap: var(--space-4);
}
.page-app-download .scene-list {
  display: grid;
  gap: var(--space-3);
}
.page-app-download .scene {
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  border-left: calc(var(--border-thin) * 3) solid var(--color-line);
}
.page-app-download .scene--a {
  border-left-color: var(--color-primary);
}
.page-app-download .scene--b {
  border-left-color: var(--color-accent);
}
.page-app-download .scene--c {
  border-left-color: var(--color-contrast-accent);
}
.page-app-download .scene h3 {
  margin: 0 0 var(--space-1);
  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 .scene p {
  margin: 0;
  max-width: 52ch;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-app-download .scene-media {
  margin: 0;
}
.page-app-download .scene-media-frame {
  position: relative;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
}
.page-app-download .scene-media-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-app-download .scene-media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
  background: linear-gradient(148deg,
    color-mix(in srgb, var(--color-primary) 46%, transparent) 0%,
    color-mix(in srgb, var(--color-accent) 26%, transparent) 100%);
}
.page-app-download .scene-links {
  margin: var(--space-6) 0 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 选择建议与边界 ---------- */
.page-app-download .advice-list {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.page-app-download .advice {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-top: calc(var(--border-thin) * 3) solid var(--color-line);
  border-radius: var(--radius-sm);
}
.page-app-download .advice:nth-child(1) {
  border-top-color: var(--color-primary);
}
.page-app-download .advice:nth-child(2) {
  border-top-color: var(--color-accent);
}
.page-app-download .advice:nth-child(3) {
  border-top-color: var(--color-contrast-accent);
}
.page-app-download .advice:nth-child(4) {
  border-top-color: var(--color-ink-muted);
}
.page-app-download .advice-when {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.page-app-download .advice h3 {
  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 .advice p:last-child {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-app-download .boundary {
  padding: var(--space-4) var(--space-3);
  background: var(--color-highlight);
  border-left: calc(var(--border-thin) * 4) solid var(--color-accent);
  border-radius: var(--radius-sm);
}
.page-app-download .boundary h3 {
  margin: 0 0 var(--space-2);
  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 .boundary ul {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-app-download .prep-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }
  .page-app-download .advice-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3) var(--space-4);
  }
  .page-app-download .figure-num {
    font-size: var(--text-figure);
  }
}

@media (min-width: 900px) {
  .page-app-download .hero-copy {
    grid-column: 1 / span 7;
  }
  .page-app-download .hero-figures {
    grid-column: 8 / span 5;
    align-self: end;
  }
  .page-app-download .version-head {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
  }
  .page-app-download .pg-head p {
    font-size: var(--text-base);
  }
}

@media (min-width: 1000px) {
  .page-app-download .prep-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
    align-items: start;
  }
  .page-app-download .scene-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--space-6);
    align-items: start;
  }
  .page-app-download .pg {
    padding-block: var(--section-y-lg);
  }
}