.page-app-download {
  --collage-pad: var(--space-3);
  --card-pad: var(--space-3);
  --figure-block-w: calc(var(--space-8) * 4);
}

.page-app-download .client-hero {
  position: relative;
  padding: var(--space-4) 0 var(--space-8);
  background: var(--color-surface);
  overflow-x: clip;
}

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

.page-app-download .hero-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.08;
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
  max-width: 11ch;
}

.page-app-download .hero-lede {
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
  max-width: 60ch;
  margin: 0;
}

/* ---------- 首屏拼贴 ---------- */
.page-app-download .collage {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding: var(--collage-pad);
}

.page-app-download .collage-underlay {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
  overflow: hidden;
}

.page-app-download .collage-underlay img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-app-download .collage-scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-app-download .ent-card {
  position: relative;
  z-index: 1;
  padding: var(--card-pad);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-app-download .ent-card:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: calc(var(--border-thick) * 2);
}

.page-app-download .ent-index {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-app-download .ent-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  margin: var(--space-1) 0 var(--space-2);
}

.page-app-download .ent-who {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-2);
}

.page-app-download .ent-desc {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  margin: 0 0 var(--space-2);
}

.page-app-download .ent-step {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) dashed var(--color-line);
}

.page-app-download .ent-hint {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  margin: var(--space-2) 0 0;
  padding-left: var(--space-2);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-app-download .ent-card--main {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
  z-index: 2;
}

.page-app-download .ent-card--main .ent-index {
  color: var(--color-contrast-accent);
}

.page-app-download .ent-card--main .ent-who {
  color: color-mix(in srgb, var(--color-contrast-ink) 76%, transparent);
}

.page-app-download .ent-card--main .ent-step {
  border-top-color: var(--color-contrast-line);
}

.page-app-download .ent-card--main .ent-hint {
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent);
  border-left-color: var(--color-contrast-accent);
}

.page-app-download .ent-card--beta {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-app-download .ent-card--stable {
  background: var(--color-surface-alt);
}

.page-app-download .ent-card--legacy {
  background: var(--color-highlight);
}

.page-app-download .ent-card--flash {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
}

.page-app-download .ent-card--flash .ent-index,
.page-app-download .ent-card--flash .ent-who,
.page-app-download .ent-card--flash .ent-hint {
  color: color-mix(in srgb, var(--color-accent-ink) 82%, transparent);
}

.page-app-download .ent-card--flash .ent-hint,
.page-app-download .ent-card--flash .ent-step {
  border-color: color-mix(in srgb, var(--color-accent-ink) 45%, transparent);
}

/* 数字块 */
.page-app-download .collage-figures {
  position: relative;
  z-index: 6;
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
}

.page-app-download .fig-item {
  margin: 0;
}

.page-app-download .fig-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.95;
  color: var(--color-contrast-accent);
}

.page-app-download .fig-tail {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.page-app-download .fig-cap {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

/* ---------- 通用小件 ---------- */
.page-app-download .point-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.page-app-download .point-text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-app-download .btn-row {
  margin: var(--space-4) 0 0;
}

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

.page-app-download .new-visual,
.page-app-download .legacy-visual,
.page-app-download .prepare-visual {
  margin: 0;
}

.page-app-download .new-grid,
.page-app-download .legacy-grid,
.page-app-download .prepare-grid {
  align-items: start;
  gap: var(--space-6);
}

.page-app-download .new-grid > *,
.page-app-download .legacy-grid > *,
.page-app-download .prepare-grid > * {
  grid-column: 1 / -1;
  min-width: 0;
}

/* ---------- 新版入口 ---------- */
.page-app-download .new-points {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-app-download .new-points > li {
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

/* ---------- 版本差异 ---------- */
.page-app-download .version-diff .lede {
  max-width: 68ch;
}

.page-app-download .diff-table {
  margin-top: var(--space-4);
  border-top: var(--border-thick) solid var(--color-primary);
}

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

.page-app-download .diff-row {
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
  border-radius: 0;
}

.page-app-download .diff-row > .panel-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2);
  cursor: pointer;
  list-style: none;
}

.page-app-download .diff-row > .panel-head::-webkit-details-marker {
  display: none;
}

.page-app-download .diff-field {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.page-app-download .diff-cell {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-app-download .diff-tag {
  font-style: normal;
  color: var(--color-primary);
  margin-right: var(--space-1);
}

.page-app-download .diff-row:hover {
  background: var(--color-surface-alt);
}

.page-app-download .diff-row:hover > .panel-head,
.page-app-download .diff-row:focus-within > .panel-head {
  box-shadow: inset calc(var(--border-thick) * 2) 0 0 var(--color-accent);
}

/* ---------- 旧版对照 ---------- */
.page-app-download .legacy-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-app-download .legacy-list > li {
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-app-download .legacy-note {
  display: inline-block;
  margin: var(--space-4) 0 0;
}

/* ---------- 安装准备 ---------- */
.page-app-download .prep-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-app-download .prep-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-app-download .prep-item input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: var(--space-3);
  height: var(--space-3);
  margin: var(--space-1) 0 0;
  box-sizing: border-box;
  border: var(--border-thick) solid var(--color-primary);
  border-radius: 0;
  background: transparent;
  position: relative;
  cursor: pointer;
}

.page-app-download .prep-item input[type="checkbox"]:checked {
  background: var(--color-primary);
}

.page-app-download .prep-item input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  inset: calc(var(--space-1) / 2);
  background: var(--color-primary-ink);
}

.page-app-download .prep-item input[type="checkbox"]:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: calc(var(--border-thick) * 2);
}

.page-app-download .prep-label {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  cursor: pointer;
}

.page-app-download .prep-how {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

/* ---------- 问答 ---------- */
.page-app-download .faq-list {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-app-download .faq-row {
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}

.page-app-download .faq-row > .panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
}

.page-app-download .faq-row > .panel-head::-webkit-details-marker {
  display: none;
}

.page-app-download .faq-row:focus-within {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: calc(var(--border-thick) * 2);
}

.page-app-download .faq-no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  flex: none;
}

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

.page-app-download .panel-body {
  padding: 0 var(--space-3) var(--space-3);
}

.page-app-download .panel-body p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-app-download .panel-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 收尾 ---------- */
.page-app-download .outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-app-download .outro-note {
  display: block;
  margin: var(--space-4) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-app-download .outro-note a {
  color: var(--color-primary);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-app-download {
    --collage-pad: var(--space-4);
    --card-pad: var(--space-4);
  }

  .page-app-download .collage {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-app-download .ent-card--main {
    grid-column: 1 / -1;
  }

  .page-app-download .ent-card--beta {
    grid-column: 2 / 3;
  }

  .page-app-download .ent-card--stable {
    grid-column: 1 / 2;
    margin-top: calc(var(--space-4) * -1);
    z-index: 3;
  }

  .page-app-download .ent-card--legacy {
    grid-column: 2 / 3;
    margin-top: calc(var(--space-6) * -1);
    z-index: 4;
  }

  .page-app-download .ent-card--flash {
    grid-column: 1 / -1;
    z-index: 5;
  }

  .page-app-download .collage-figures {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, 1fr);
  }

  .page-app-download .new-points > li {
    display: grid;
    grid-template-columns: 148px 1fr;
    gap: var(--space-3);
  }
}

@media (min-width: 1024px) {
  .page-app-download .collage {
    grid-template-columns: repeat(12, 1fr);
    padding-bottom: var(--space-8);
  }

  .page-app-download .ent-card--main {
    grid-column: 1 / 7;
    grid-row: 1 / 2;
    padding: var(--space-6);
    margin-top: 0;
  }

  .page-app-download .ent-card--beta {
    grid-column: 6 / 11;
    grid-row: 2 / 3;
    margin-top: calc(var(--space-8) * -1);
    z-index: 3;
  }

  .page-app-download .ent-card--stable {
    grid-column: 1 / 6;
    grid-row: 3 / 4;
    margin-top: calc(var(--space-6) * -1);
    z-index: 4;
  }

  .page-app-download .ent-card--legacy {
    grid-column: 8 / 13;
    grid-row: 3 / 4;
    margin-top: calc(var(--space-8) * -1.6);
    z-index: 4;
  }

  .page-app-download .ent-card--flash {
    grid-column: 4 / 10;
    grid-row: 4 / 5;
    margin-top: calc(var(--space-6) * -1);
    z-index: 5;
  }

  .page-app-download .collage-figures {
    position: absolute;
    right: var(--space-4);
    bottom: calc(var(--space-4) * -1);
    width: var(--figure-block-w);
    grid-template-columns: 1fr;
    gap: var(--space-2);
    z-index: 7;
  }

  .page-app-download .fig-item--wide .fig-num {
    font-size: calc(var(--text-figure) * 1.2);
    letter-spacing: -0.02em;
    margin-right: calc(var(--space-6) * -1);
    white-space: nowrap;
  }

  .page-app-download .new-grid > .new-copy {
    grid-column: 1 / 8;
  }

  .page-app-download .new-grid > .new-visual {
    grid-column: 9 / 13;
    margin-top: var(--space-6);
  }

  .page-app-download .legacy-grid > .legacy-visual {
    grid-column: 1 / 7;
  }

  .page-app-download .legacy-grid > .legacy-copy {
    grid-column: 8 / 13;
  }

  .page-app-download .prepare-grid > .prepare-copy {
    grid-column: 1 / 8;
  }

  .page-app-download .prepare-grid > .prepare-visual {
    grid-column: 9 / 13;
    margin-top: var(--space-6);
  }

  .page-app-download .diff-head {
    display: grid;
    grid-template-columns: 1.1fr 1fr 1fr;
    gap: var(--space-3);
    padding: 0 var(--space-2) var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-ink-muted);
  }

  .page-app-download .diff-row > .panel-head {
    grid-template-columns: 1.1fr 1fr 1fr;
    gap: var(--space-3);
    align-items: baseline;
  }

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

  .page-app-download .faq-row > .panel-head {
    padding: var(--space-4) var(--space-3);
  }
}

@media (hover: hover) and (min-width: 1024px) {
  .page-app-download .ent-hint {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    transition: max-height 0.22s ease, opacity 0.22s ease, margin-top 0.22s ease;
  }

  .page-app-download .ent-card:hover .ent-hint,
  .page-app-download .ent-card:focus-visible .ent-hint,
  .page-app-download .ent-card:focus-within .ent-hint {
    max-height: 12em;
    opacity: 1;
    margin-top: var(--space-2);
  }
}
<<<END>>>