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

.page-app-download [id] {
  scroll-margin-top: 96px;
}

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

.page-app-download .hero-cell--contrast :focus-visible,
.page-app-download .version :focus-visible {
  outline-color: var(--color-contrast-accent);
}

/* ---------- 面包屑 ---------- */
.page-app-download .breadcrumb {
  background: var(--color-surface-deep);
  padding: var(--space-3) 0;
}

.page-app-download .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-app-download .breadcrumb-list li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-ink-muted);
}

.page-app-download .breadcrumb-list a {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.page-app-download .breadcrumb-list a:hover {
  color: var(--color-primary);
}

/* ---------- 首屏 ---------- */
.page-app-download .hero {
  background: var(--color-surface);
  overflow: hidden;
}

.page-app-download .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-app-download .hero-cell {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  justify-content: center;
  padding: var(--space-6) var(--space-4);
  min-width: 0;
}

.page-app-download .hero-cell--light {
  position: relative;
  padding: 0;
  min-height: 220px;
  background: var(--color-surface-deep);
  overflow: hidden;
}

.page-app-download .hero-cell--light::after {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--color-accent) 58%, transparent);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.page-app-download .hero-img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  filter: grayscale(100%) contrast(1.06);
}

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

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

.page-app-download .hero-eyebrow {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  opacity: 0.84;
}

.page-app-download .hero-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  word-break: keep-all;
}

.page-app-download .hero-lede {
  margin: 0;
  max-width: 42ch;
  font-size: var(--text-lg);
  line-height: 1.5;
  opacity: 0.94;
}

.page-app-download .hero-aside {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-app-download .hero-jump {
  align-self: flex-start;
  color: var(--color-contrast-accent);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-app-download .hero-jump:hover {
  text-decoration-thickness: var(--border-thick);
}

/* ---------- 首屏数字 ---------- */
.page-app-download .hero-stats-wrap {
  padding-bottom: var(--space-8);
}

.page-app-download .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-app-download .stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  min-width: 0;
}

.page-app-download .stat--a {
  background: var(--color-surface-deep);
  color: var(--color-ink);
}

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

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

.page-app-download .stat--d {
  background: var(--color-surface-alt);
  color: var(--color-ink);
}

.page-app-download .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 0.95;
  letter-spacing: 0.04em;
}

.page-app-download .stat--c .stat-num {
  color: var(--color-contrast-accent);
}

.page-app-download .stat-label {
  font-size: var(--text-sm);
  line-height: 1.35;
  opacity: 0.82;
}

/* ---------- 分组导览 ---------- */
.page-app-download .groups-intro {
  background: var(--color-surface-alt);
  padding: var(--section-y) 0;
}

.page-app-download .gi-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-app-download .kicker {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  color: var(--color-primary);
  font-weight: var(--weight-heading);
}

.page-app-download .gi-main h2 {
  margin: var(--space-3) 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-app-download .gi-text {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-app-download .inline-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-app-download .inline-link:hover {
  color: var(--color-primary);
}

.page-app-download .gi-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .gi-nav a {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  color: var(--color-ink);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
}

.page-app-download .gi-nav a:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-app-download .gi-nav a:hover .gi-num {
  color: var(--color-primary-ink);
}

.page-app-download .gi-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

/* ---------- 分组 ---------- */
.page-app-download .group {
  padding: var(--section-y) 0;
}

.page-app-download .group--phone {
  background: var(--color-surface);
}

.page-app-download .group--screen {
  background: var(--color-surface-alt);
}

.page-app-download .group--account {
  background: var(--color-surface);
}

.page-app-download .group-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-app-download .group-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--color-primary);
}

.page-app-download .group-head-text h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

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

.page-app-download .group-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-contrast-surface);
}

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

.page-app-download .group-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
}

.page-app-download .group-figure--accent::after {
  background: color-mix(in srgb, var(--color-accent) 46%, transparent);
}

.page-app-download .group-figure--primary::after {
  background: color-mix(in srgb, var(--color-primary) 48%, transparent);
}

.page-app-download .group-figure--tall {
  aspect-ratio: 3 / 4;
}

.page-app-download .group-figure--wide {
  aspect-ratio: 13 / 8;
}

.page-app-download .group-figure--square {
  aspect-ratio: 1 / 1;
}

.page-app-download .group-foot {
  margin-top: var(--space-6);
}

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

/* ---------- 卡片 ---------- */
.page-app-download .cards {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: minmax(0, 1fr);
}

.page-app-download .card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  box-shadow: none;
  min-width: 0;
}

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

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

.page-app-download .card--account {
  background: var(--color-surface-deep);
  padding: var(--space-6);
}

.page-app-download .card-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.page-app-download .card-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.28;
  letter-spacing: var(--tracking-heading);
}

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

.page-app-download .card-fields {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .card-fields dt {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  margin-bottom: 4px;
}

.page-app-download .card-fields dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- 状态徽标 ---------- */
.page-app-download .state {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  line-height: 1.7;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

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

.page-app-download .state--soon {
  background: var(--color-highlight);
  color: var(--color-accent);
}

.page-app-download .state--steady {
  background: color-mix(in srgb, var(--color-ink-muted) 20%, transparent);
  color: var(--color-ink-soft);
}

/* ---------- 折叠 ---------- */
.page-app-download .collapse {
  margin-top: auto;
}

.page-app-download .collapse summary {
  cursor: pointer;
  list-style: none;
  padding-top: var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
}

.page-app-download .collapse summary::-webkit-details-marker {
  display: none;
}

.page-app-download .collapse summary::after {
  content: " +";
  font-family: var(--font-mono);
}

.page-app-download .collapse[open] summary::after {
  content: " −";
}

.page-app-download .collapse-body {
  padding-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .collapse-body ul {
  margin: 0;
  padding-left: 1.1em;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

/* ---------- 换设备步骤 ---------- */
.page-app-download .subhead {
  margin: var(--space-8) 0 var(--space-4);
  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);
}

.page-app-download .sync-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

.page-app-download .sync-steps li {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
}

.page-app-download .sync-index {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
}

.page-app-download .sync-steps h4 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-app-download .sync-steps p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 版本对比 ---------- */
.page-app-download .version {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y-lg) 0;
}

.page-app-download .version .group-num {
  color: var(--color-contrast-accent);
}

.page-app-download .version h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  max-width: 20ch;
}

.page-app-download .version-lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-app-download .version-tabs {
  margin-top: var(--space-6);
}

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

.page-app-download .version-tabs .tab {
  appearance: none;
  border: 0;
  cursor: pointer;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-contrast-ink) 14%, transparent);
  color: var(--color-contrast-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: 0.04em;
}

.page-app-download .version-tabs .tab[aria-selected="true"] {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.page-app-download .version-tabs .tab-panel {
  padding-top: var(--space-6);
}

.page-app-download .version-tabs .tab-panel[hidden] {
  display: none;
}

.page-app-download .version-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-app-download .version-list li {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .version-list h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.3;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-accent);
}

.page-app-download .version-list p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-app-download .version-list .inline-link {
  color: var(--color-contrast-accent);
}

.page-app-download .version-list .inline-link:hover {
  color: var(--color-contrast-ink);
}

.page-app-download .version-note {
  margin: var(--space-6) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

/* ---------- 行动出口 ---------- */
.page-app-download .outro {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  padding: var(--section-y-lg) 0;
}

.page-app-download .outro-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-app-download .outro .group-num {
  color: var(--color-primary-ink);
  opacity: 0.72;
}

.page-app-download .outro h2 {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary-ink);
  max-width: 22ch;
}

.page-app-download .outro p {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-app-download .outro-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
}

.page-app-download .contact-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-app-download .contact-key {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  opacity: 0.78;
}

.page-app-download .contact-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
  color: var(--color-primary-ink);
  word-break: break-word;
}

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

.page-app-download .outro-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.page-app-download .outro .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: 0.04em;
  text-align: center;
}

.page-app-download .outro .btn-accent {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-accent);
}

.page-app-download .outro .btn-quiet {
  background: color-mix(in srgb, var(--color-primary-ink) 18%, transparent);
  color: var(--color-primary-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-app-download .cards {
    gap: var(--space-4);
  }

  .page-app-download .cards--phone {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-app-download .outro-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .page-app-download .outro-contact {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-6);
  }
}

@media (min-width: 760px) {
  .page-app-download .hero-stats-wrap {
    margin-top: calc(-1 * var(--space-8));
  }

  .page-app-download .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-app-download .stat {
    padding: var(--space-4);
  }

  .page-app-download .stat--a {
    transform: translateY(-30px);
  }

  .page-app-download .stat--b {
    transform: translateY(6px);
  }

  .page-app-download .stat--c {
    transform: translateY(-52px);
  }

  .page-app-download .stat--d {
    transform: translateY(-18px);
  }

  .page-app-download .sync-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-app-download .version-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-app-download .hero-grid {
    grid-template-columns: 18fr 64fr 18fr;
  }

  .page-app-download .hero-cell {
    min-height: 560px;
    padding: var(--space-8) var(--space-6);
    justify-content: flex-end;
  }

  .page-app-download .hero-cell--light {
    padding: 0;
    min-height: 560px;
  }

  .page-app-download .hero-cell--primary {
    padding-bottom: calc(var(--space-8) + var(--space-6));
  }

  .page-app-download .hero-cell--contrast {
    justify-content: space-between;
  }

  .page-app-download .gi-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: end;
  }

  .page-app-download .group-head {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: var(--space-8);
    align-items: start;
  }

  .page-app-download .group--screen .group-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-app-download .group--screen .group-head-text p {
    max-width: 52ch;
  }

  .page-app-download .cards--screen {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-app-download .cards--account {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-app-download .sync-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-app-download .outro-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: end;
  }
}

@media (min-width: 1040px) {
  .page-app-download .cards--phone {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download *,
  .page-app-download *::before,
  .page-app-download *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-app-download .stat {
    transform: none !important;
  }
}