.page-app-download {
  --app-panel-pad: clamp(var(--space-3), 3.4vw, var(--space-6));
  display: block;
  overflow-x: clip;
  padding-bottom: var(--section-y);
}

/* ---------- 面包屑 ---------- */
.page-app-download .breadcrumb {
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.page-app-download .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-app-download .breadcrumb li {
  display: flex;
  align-items: center;
}
.page-app-download .breadcrumb li + li::before {
  content: "/";
  margin: 0 var(--space-1);
  color: var(--color-line);
}
.page-app-download .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
}
.page-app-download .breadcrumb a:hover {
  color: var(--color-accent);
}
.page-app-download .breadcrumb [aria-current="page"] {
  color: var(--color-ink);
}

/* ---------- 首屏框景 ---------- */
.page-app-download .app-hero {
  padding-top: var(--space-6);
}
.page-app-download .app-hero__frame {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: var(--app-panel-pad);
  padding-bottom: calc(var(--app-panel-pad) + var(--space-4));
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
}
.page-app-download .app-hero__frame::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 10px;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-contrast-line) 0 1px,
    transparent 1px 22px
  );
  opacity: 0.85;
  pointer-events: none;
}
.page-app-download .app-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.page-app-download .app-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}
.page-app-download .app-hero__bg .media__scrim {
  position: absolute;
  inset: 0;
  display: block;
  background: var(--overlay-scrim);
}
.page-app-download .app-hero__flag {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  z-index: 3;
}
.page-app-download .app-hero__inner {
  position: relative;
  z-index: 2;
}
.page-app-download .app-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-4);
  max-width: 13ch;
}
.page-app-download .app-hero__lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
}

/* ---------- 首屏三个错位读数 ---------- */
.page-app-download .hero-figures {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-app-download .hero-figure {
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-contrast-accent);
}
.page-app-download .hero-figure__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--color-contrast-accent);
}
.page-app-download .hero-figure__value em {
  font-style: normal;
  font-size: 0.26em;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-left: 0.5em;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}
.page-app-download .hero-figure__label {
  display: block;
  margin-top: var(--space-2);
  max-width: 30ch;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

/* ---------- 通用区块头 ---------- */
.page-app-download .app-section__head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}
.page-app-download .app-section__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
}
.page-app-download .app-section__title {
  font-family: var(--font-heading);
  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: 0 0 var(--space-3);
}
.page-app-download .app-section__lede {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 目录索引 ---------- */
.page-app-download .app-catalog__groups {
  display: grid;
  gap: var(--space-6);
}
.page-app-download .app-group {
  position: relative;
  padding: calc(var(--app-panel-pad) + var(--space-2)) var(--app-panel-pad) var(--app-panel-pad);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}
.page-app-download .app-group__sticker {
  position: absolute;
  top: calc(-1 * var(--space-2));
  right: var(--space-3);
  z-index: 2;
}
.page-app-download .app-group__name {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-app-download .app-group__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-app-download .cat-item {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  column-gap: var(--space-2);
  padding: var(--space-3) var(--space-1);
  border-radius: var(--radius-md);
  transition: transform 0.18s ease, background-color 0.18s ease;
}
.page-app-download .cat-item__num {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  transition: color 0.18s ease;
}
.page-app-download .cat-item__body {
  min-width: 0;
}
.page-app-download .cat-item__title {
  margin: 0 0 var(--space-1);
  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 .cat-item__desc {
  margin: 0 0 var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-app-download .cat-item__fit {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.65;
  color: var(--color-ink-muted);
}
.page-app-download .cat-item__fit b {
  font-weight: 600;
  color: var(--color-ink-soft);
}
.page-app-download .cat-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
}
.page-app-download .cat-item:target {
  background: var(--color-highlight);
  box-shadow: var(--shadow-1);
}

.page-app-download .tag-state--ok {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}
.page-app-download .tag-state--prep {
  background: var(--color-highlight);
  color: var(--color-ink);
}
.page-app-download .tag-state--check {
  background: color-mix(in srgb, var(--color-accent) 18%, var(--color-surface));
  color: var(--color-accent);
}

/* ---------- 版本差异速览 ---------- */
.page-app-download .app-versions__grid {
  display: grid;
  gap: var(--space-6);
}
.page-app-download .app-versions__media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}
.page-app-download .app-versions__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-app-download .app-versions__body .app-section__head {
  margin-bottom: var(--space-4);
}
.page-app-download .app-version {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
  border-left: var(--border-thick) solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: var(--shadow-1);
}
.page-app-download .app-version + .app-version {
  margin-top: var(--space-3);
}
.page-app-download .app-version summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  cursor: pointer;
  list-style: none;
}
.page-app-download .app-version summary::-webkit-details-marker {
  display: none;
}
.page-app-download .app-version summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-ink-muted);
}
.page-app-download .app-version[open] summary::after {
  content: "−";
  color: var(--color-accent);
}
.page-app-download .app-version__code {
  padding: 3px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.page-app-download .app-version__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}
.page-app-download .app-version__hint {
  grid-column: 1 / -1;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}
.page-app-download .app-version__body {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  border-top: var(--border-thin) solid var(--color-line);
}
.page-app-download .app-version__body p {
  margin: 0 0 var(--space-2);
}
.page-app-download .app-version__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 安装前置 ---------- */
.page-app-download .app-prep__grid {
  display: grid;
  gap: var(--space-6);
}
.page-app-download .app-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}
.page-app-download .app-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}
.page-app-download .app-check__mark {
  align-self: start;
  padding: 3px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.page-app-download .app-check--must .app-check__mark {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}
.page-app-download .app-check--opt .app-check__mark {
  background: var(--color-primary-soft);
  color: var(--color-ink-soft);
}
.page-app-download .app-check__title {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}
.page-app-download .app-check__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .app-prep__aside {
  display: grid;
  gap: var(--space-4);
  align-content: start;
}
.page-app-download .app-prep__screen {
  position: relative;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-app-download .app-prep__screen .data-screen__label {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}
.page-app-download .app-prep__screen .data-screen__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-contrast-accent);
}
.page-app-download .app-prep__screen .data-screen__meta {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}
.page-app-download .app-prep__screen .data-screen__rule {
  display: block;
  margin-top: var(--space-3);
  height: 8px;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-contrast-line) 0 1px,
    transparent 1px 18px
  );
}
.page-app-download .app-prep__media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}
.page-app-download .app-prep__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 3;
  object-fit: cover;
}

/* ---------- 更新与维护 ---------- */
.page-app-download .app-updates__cols {
  display: grid;
  gap: var(--space-4);
}
.page-app-download .app-updates__col {
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
}
.page-app-download .app-updates__col-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-app-download .app-updates__col p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-app-download .app-updates__media {
  margin: var(--space-6) 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
}
.page-app-download .app-updates__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 边界说明 ---------- */
.page-app-download .app-boundary__panel {
  position: relative;
  padding: calc(var(--app-panel-pad) + var(--space-2)) var(--app-panel-pad) var(--app-panel-pad);
  background: var(--color-surface-deep);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
}
.page-app-download .app-boundary__sticker {
  position: absolute;
  top: calc(-1 * var(--space-2));
  right: var(--space-3);
  z-index: 2;
}
.page-app-download .app-boundary__list {
  list-style: none;
  margin: var(--space-4) 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-3);
  max-width: var(--measure);
}
.page-app-download .app-boundary__list li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.page-app-download .app-boundary__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 12px;
  height: var(--border-thick);
  background: var(--color-accent);
}
.page-app-download .app-boundary__lead {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}
.page-app-download .app-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
}

/* ---------- 交互增强 ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-app-download .cat-item:hover {
    transform: translateY(-2px);
  }
  .page-app-download .cat-item:hover .cat-item__num {
    color: var(--color-accent);
  }
}

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

/* ---------- 中等屏 ---------- */
@media (min-width: 768px) {
  .page-app-download .hero-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
    align-items: start;
  }
  .page-app-download .hero-figures > li:nth-child(2) {
    margin-top: var(--space-4);
  }
  .page-app-download .hero-figures > li:nth-child(3) {
    margin-top: var(--space-1);
  }
  .page-app-download .cat-item {
    grid-template-columns: 2.4rem minmax(0, 1fr);
    column-gap: var(--space-3);
  }
  .page-app-download .app-updates__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-6) var(--gutter);
  }
  .page-app-download .app-updates__col:nth-child(2) {
    margin-top: var(--space-4);
  }
}

/* ---------- 大屏：错位栅格 ---------- */
@media (min-width: 1024px) {
  .page-app-download .app-hero {
    padding-top: var(--space-8);
  }
  .page-app-download .app-hero__frame {
    padding: var(--space-8) var(--space-8) calc(var(--space-8) + var(--space-4));
  }
  .page-app-download .app-hero__lede {
    font-size: var(--text-xl);
  }

  .page-app-download .app-catalog__groups {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: var(--gutter);
    row-gap: var(--space-8);
  }
  .page-app-download .app-group:nth-child(1) {
    grid-column: 1 / span 7;
  }
  .page-app-download .app-group:nth-child(2) {
    grid-column: 8 / span 5;
    margin-top: var(--space-6);
  }
  .page-app-download .app-group:nth-child(3) {
    grid-column: 2 / span 5;
  }
  .page-app-download .app-group:nth-child(4) {
    grid-column: 7 / span 6;
    margin-top: var(--space-6);
  }
  .page-app-download .app-group:nth-child(5) {
    grid-column: 1 / span 6;
  }
  .page-app-download .app-group:nth-child(6) {
    grid-column: 7 / span 6;
    margin-top: var(--space-6);
  }

  .page-app-download .app-versions__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: var(--space-8);
    align-items: start;
  }
  .page-app-download .app-versions__body {
    padding-top: var(--space-3);
  }

  .page-app-download .app-prep__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: var(--space-8);
    align-items: start;
  }
  .page-app-download .app-prep__aside {
    position: sticky;
    top: calc(var(--space-8) + var(--space-2));
  }

  .page-app-download .app-boundary__panel {
    padding: var(--space-8);
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-app-download .cat-item,
  .page-app-download .cat-item__num {
    transition: none;
  }
  .page-app-download .cat-item:hover {
    transform: none;
  }
  .page-app-download .app-prep__aside {
    position: static;
  }
}
<<<END>>>