.page-app-download {
  --apd-rail: 88px;
  --apd-band-cut: 32px;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

/* ---------- 通用小节 ---------- */
.page-app-download .apd-section {
  padding: var(--section-y) 0;
}

.page-app-download .rule-band {
  height: var(--space-2);
  background: var(--color-primary);
}

.page-app-download .rule-band--accent {
  background: var(--color-accent);
}

.page-app-download .rule-band--thick {
  height: var(--space-3);
}

.page-app-download .section-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  max-width: 62ch;
}

.page-app-download .section-head__mark {
  width: var(--space-8);
  height: var(--space-2);
  background: var(--color-primary);
}

.page-app-download .section-head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .section-head__lede {
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-app-download .section-head--on-contrast .section-head__mark {
  background: var(--color-contrast-accent);
}

.page-app-download .section-head--on-contrast h2 {
  color: var(--color-contrast-ink);
}

.page-app-download .section-head--on-contrast .section-head__lede {
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, var(--color-contrast-surface));
}

.page-app-download .data-label {
  display: inline-block;
  margin-right: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

/* ---------- 首屏 ---------- */
.page-app-download .hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-top: var(--space-4);
}

.page-app-download .hero__top {
  padding-bottom: var(--space-6);
}

.page-app-download .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
}

.page-app-download .breadcrumb a {
  color: var(--color-contrast-accent);
  text-decoration: none;
}

.page-app-download .breadcrumb a:hover {
  text-decoration: underline;
}

.page-app-download .breadcrumb .slash {
  color: var(--color-contrast-line);
}

.page-app-download .kicker {
  margin: var(--space-4) 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-app-download .hero__title {
  display: flex;
  flex-direction: column;
  margin: 0;
  font-size: var(--text-display);
  line-height: 0.86;
  letter-spacing: var(--tracking-heading);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-app-download .hero__title-num {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
  -webkit-text-stroke: 1px var(--color-primary);
}

.page-app-download .hero__title-text {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: 0.34em;
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
}

.page-app-download .hero__lede {
  max-width: 56ch;
  margin: var(--space-4) 0 0;
  font-size: var(--text-lg);
  line-height: 1.55;
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, var(--color-contrast-surface));
}

.page-app-download .hero__band {
  display: grid;
  grid-template-columns: 1fr;
}

.page-app-download .hero__seg {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  min-height: 132px;
  padding: var(--space-4) var(--space-3) var(--space-6);
}

.page-app-download .hero__seg-count {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  opacity: 0.86;
}

.page-app-download .hero__seg-name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.15;
}

.page-app-download .hero__seg-note {
  font-size: var(--text-sm);
  opacity: 0.82;
}

.page-app-download .hero__seg--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-app-download .hero__seg--light {
  background: var(--color-contrast-ink);
  color: var(--color-contrast-surface);
}

.page-app-download .hero__seg--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-app-download .hero__seg--soft {
  background: var(--color-highlight);
  color: var(--color-ink);
}

/* ---------- 端侧索引 ---------- */
.page-app-download .port-index {
  background: var(--color-surface);
}

.page-app-download .port-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-app-download .port-index__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3);
  background: var(--color-surface);
}

.page-app-download .port-index__row:nth-child(2n) {
  background: var(--color-surface-alt);
}

.page-app-download .port-index__no {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
}

.page-app-download .port-index__main h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-app-download .port-index__main p {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-app-download .port-index__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.page-app-download .port-index__jump {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.page-app-download .port-index__jump a {
  color: var(--color-accent);
  text-decoration: none;
}

.page-app-download .port-index__jump a::before {
  content: "→ ";
  color: var(--color-primary);
}

.page-app-download .port-index__jump a:hover {
  text-decoration: underline;
}

/* ---------- 步骤 ---------- */
.page-app-download .steps {
  background: var(--color-surface);
}

.page-app-download .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.page-app-download .filter-chip {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
}

.page-app-download .filter-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-app-download .filter-chip.is-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

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

.page-app-download .step-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-app-download .step {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  background: var(--color-surface);
}

.page-app-download .step:nth-child(2n) {
  background: var(--color-surface-alt);
}

.page-app-download .step__rail {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.page-app-download .step__no {
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
}

.page-app-download .step__group {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-app-download .step__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .step__action {
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
  color: var(--color-ink);
}

.page-app-download .step__caution {
  margin: 0 0 var(--space-2);
  padding: var(--space-2);
  max-width: var(--measure);
  background: var(--color-surface-deep);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-app-download .step__confirm {
  margin: 0 0 var(--space-2);
  padding: var(--space-2) var(--space-3);
  max-width: var(--measure);
  background: var(--color-highlight);
  color: var(--color-ink);
}

.page-app-download .step__confirm .data-label {
  color: var(--color-accent);
}

.page-app-download .step__version {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 版本差异 ---------- */
.page-app-download .versions {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .version-table-wrap {
  overflow-x: auto;
}

.page-app-download .version-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.page-app-download .version-table caption {
  text-align: left;
  padding-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, var(--color-contrast-surface));
}

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

.page-app-download .version-table thead th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
  border-bottom: var(--border-thick) solid var(--color-contrast-accent);
}

.page-app-download .version-table tbody th {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
  white-space: nowrap;
}

.page-app-download .version-table tbody td {
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, var(--color-contrast-surface));
}

.page-app-download .version-table tbody tr:nth-child(2n) {
  background: color-mix(in srgb, var(--color-contrast-ink) 7%, var(--color-contrast-surface));
}

.page-app-download .apd-figure {
  margin: var(--space-6) 0 0;
}

.page-app-download .apd-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.page-app-download .apd-figure figcaption {
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, var(--color-contrast-surface));
}

/* ---------- 准备清单 ---------- */
.page-app-download .prep {
  background: var(--color-surface);
}

.page-app-download .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-app-download .prep-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  padding: var(--space-3) var(--space-2);
  background: var(--color-surface-alt);
  align-items: start;
}

.page-app-download .prep-item:nth-child(2n) {
  background: var(--color-surface-deep);
}

.page-app-download .prep-item__tick {
  width: var(--space-2);
  height: var(--space-2);
  margin-top: 6px;
  background: var(--color-primary);
}

.page-app-download .prep-item__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-app-download .prep-item__desc {
  grid-column: 2;
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 自检 ---------- */
.page-app-download .selfcheck {
  background: var(--color-surface-alt);
}

.page-app-download .check-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-app-download .check-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3) var(--space-2);
}

.page-app-download .check-item:nth-child(2n) {
  background: var(--color-surface);
}

.page-app-download .check-item__no {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.page-app-download .check-item__body h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-app-download .check-item__body p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 收口 ---------- */
.page-app-download .closing {
  background: var(--color-surface);
  padding: var(--section-y) 0 calc(var(--section-y) + var(--space-4));
}

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

.page-app-download .closing__text h2 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .closing__text p {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-app-download .closing__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-app-download .hero__band {
    grid-template-columns: repeat(4, 1fr);
    clip-path: polygon(0 0, 100% 0, calc(100% - var(--apd-band-cut)) 100%, var(--apd-band-cut) 100%);
  }

  .page-app-download .hero__seg {
    min-height: 168px;
  }

  .page-app-download .port-index__row {
    grid-template-columns: 64px minmax(0, 1fr) minmax(0, 360px);
    align-items: start;
  }

  .page-app-download .port-index__jump {
    grid-column: 2;
  }

  .page-app-download .port-index__media {
    grid-column: 3;
    grid-row: 1 / span 2;
  }

  .page-app-download .prep-item {
    grid-template-columns: auto 240px minmax(0, 1fr);
    align-items: start;
  }

  .page-app-download .prep-item__desc {
    grid-column: 3;
  }
}

@media (min-width: 900px) {
  .page-app-download .step {
    grid-template-columns: var(--apd-rail) minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .page-app-download .step__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .page-app-download .closing__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}
<<<END>>>