.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);
  overflow-x: hidden;
}

.page-app-download *,
.page-app-download *::before,
.page-app-download *::after {
  box-sizing: border-box;
}

.page-app-download .page-app-download__crumbs {
  padding: calc(var(--space-8) + var(--space-6)) 0 var(--space-3);
  background: var(--color-surface);
}

.page-app-download .page-app-download__crumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 140ms ease;
}

.page-app-download .page-app-download__crumbs a:hover,
.page-app-download .page-app-download__crumbs a:focus-visible {
  color: var(--color-accent);
}

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

/* ---------- 首屏 ---------- */

.page-app-download .hero-download {
  padding: var(--space-6) 0 var(--space-8);
  background: var(--color-surface);
}

.page-app-download .hero-download .eyebrow {
  margin: 0 0 var(--space-4);
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-app-download .hero-download__top {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  border-bottom: var(--border-thick) solid var(--color-ink);
  padding-bottom: var(--space-4);
}

.page-app-download .hero-download__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.page-app-download .hero-download__flag {
  margin: 0 0 var(--space-2);
  white-space: nowrap;
}

.page-app-download .hero-download__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
  align-items: start;
}

.page-app-download .hero-download__lead {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: 1.62;
  color: var(--color-ink-soft);
}

.page-app-download .hero-download__media {
  margin: 0;
}

.page-app-download .hero-download__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.page-app-download .hero-download__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin: var(--space-8) 0 0;
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .hero-download__stat {
  min-width: 0;
}

.page-app-download .hero-download__stat dt {
  margin: 0 0 var(--space-1);
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-app-download .hero-download__stat dd {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.page-app-download .hero-download__num {
  font-weight: var(--weight-heading);
}

.page-app-download .hero-download__num--wide {
  display: inline-block;
  padding: 0.06em 0.2em;
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-size: calc(var(--text-figure) * 0.5);
  letter-spacing: -0.01em;
}

.page-app-download .hero-download__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  font-weight: 500;
}

/* ---------- 三段递进 3:9 分栏 ---------- */

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

.page-app-download .band__grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: stretch;
}

.page-app-download .band__rail {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .band__no {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-contrast-accent);
  letter-spacing: -0.02em;
}

.page-app-download .band__claim {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-contrast-ink);
}

.page-app-download .band__body {
  padding: var(--space-6) 0;
  background: var(--color-surface);
}

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

.page-app-download .band__intro {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

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

.page-app-download .band__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.page-app-download .band__figure--square {
  max-width: 480px;
}

/* ---------- 困难清单 ---------- */

.page-app-download .pin-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .pin-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .pin-list__no {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.2;
  color: var(--color-primary);
}

.page-app-download .pin-list__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 .pin-list__text p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.85;
}

/* ---------- 四端清单 ---------- */

.page-app-download .device-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-app-download .device-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: var(--space-1) var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 140ms ease;
}

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

.page-app-download .device-list__icon {
  grid-row: span 2;
  margin-top: 2px;
  color: var(--color-primary);
}

.page-app-download .device-list__body {
  min-width: 0;
}

.page-app-download .device-list__name {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-app-download .device-list__desc {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.8;
}

.page-app-download .device-list__tag {
  grid-column: 2;
  justify-self: start;
  margin: var(--space-1) 0 0;
  padding: 0.15em var(--space-1);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
}

/* ---------- 索取说明 ---------- */

.page-app-download .ask-box {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-left: var(--border-thick) solid var(--color-accent);
}

.page-app-download .ask-box__title {
  margin: 0 0 var(--space-3);
  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 .ask-box__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-app-download .ask-box__list li {
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.8;
}

.page-app-download .ask-box__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-app-download .ask-box__list strong {
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

/* ---------- 准备清单 ---------- */

.page-app-download .prep-list {
  list-style: none;
  counter-reset: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .prep-list__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .prep-list__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.06em;
  color: var(--color-accent);
  padding-top: 3px;
}

.page-app-download .prep-list__title {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-app-download .prep-list__item p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.85;
}

.page-app-download .fail-box {
  margin-top: var(--space-6);
  padding: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .fail-box__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-app-download .fail-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-app-download .fail-list li {
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  position: relative;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-contrast-ink);
}

.page-app-download .fail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--space-2) + 0.62em);
  width: 10px;
  height: var(--border-thick);
  background: var(--color-contrast-accent);
}

.page-app-download .fail-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

/* ---------- 版本对照 ---------- */

.page-app-download .version-section {
  padding: var(--section-y) 0;
  background: var(--color-surface-alt);
}

.page-app-download .version-section__head {
  max-width: 760px;
  margin-bottom: var(--space-6);
}

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

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

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

.page-app-download .version-section__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.page-app-download .version-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
}

.page-app-download .version-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.75;
}

.page-app-download .version-table__caption {
  caption-side: top;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  color: var(--color-ink-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-app-download .version-table thead th {
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-deep);
  color: var(--color-ink);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: left;
  border-bottom: var(--border-thick) solid var(--color-ink);
  white-space: nowrap;
}

.page-app-download .version-table tbody th,
.page-app-download .version-table tbody td {
  padding: var(--space-4);
  text-align: left;
  vertical-align: top;
  color: var(--color-ink-soft);
  border-bottom: var(--border-thin) solid var(--color-line);
}

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

.page-app-download .version-table tbody tr:nth-child(even) {
  background: var(--color-surface-alt);
}

.page-app-download .version-table tbody tr:hover {
  background: var(--color-primary-soft);
}

.page-app-download .version-table tbody tr:hover th {
  color: var(--color-primary);
}

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

.page-app-download .version-table tbody tr:last-child th,
.page-app-download .version-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-app-download .version-table__size {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
  white-space: nowrap;
}

/* ---------- 升级与支持 ---------- */

.page-app-download .upgrade-section {
  padding: var(--section-y-lg) 0;
  background: var(--color-surface);
}

.page-app-download .upgrade-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-app-download .upgrade-section__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-app-download .upgrade-section__lead {
  margin: 0 0 var(--space-6);
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-app-download .upgrade-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .upgrade-list__item {
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-app-download .upgrade-list__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-app-download .upgrade-list__item p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.85;
}

.page-app-download .upgrade-section__aside {
  align-self: start;
  padding: var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .upgrade-section__aside-label {
  margin: 0 0 var(--space-2);
  color: var(--color-contrast-accent);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-app-download .upgrade-section__aside-value {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1.3;
  color: var(--color-contrast-ink);
}

.page-app-download .upgrade-section__aside-note {
  margin: 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.8;
}

/* ---------- 行动出口 ---------- */

.page-app-download .exit-panel {
  padding: var(--section-y) 0;
  background: var(--color-surface-deep);
}

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

.page-app-download .exit-panel__title {
  margin: 0;
  max-width: 26ch;
  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 .exit-panel__text {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.9;
}

.page-app-download .exit-panel__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-4) 0 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .exit-panel__link-item a {
  display: block;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-left: var(--border-thick) solid var(--color-primary);
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.page-app-download .exit-panel__link-item a:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-left-color: var(--color-accent);
}

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

/* ---------- 桌面端 ---------- */

@media (min-width: 768px) {
  .page-app-download .hero-download__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }

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

@media (min-width: 1024px) {
  .page-app-download .hero-download {
    padding: var(--space-6) 0 var(--space-8);
  }

  .page-app-download .hero-download__grid {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-8);
  }

  .page-app-download .band__grid {
    grid-template-columns: 3fr 9fr;
  }

  .page-app-download .band__rail {
    padding: var(--space-8) var(--space-6);
    justify-content: flex-start;
  }

  .page-app-download .band__body {
    padding: var(--space-8) 0 var(--space-8) var(--space-8);
  }

  .page-app-download .band__title {
    font-size: var(--text-3xl);
  }

  .page-app-download .device-list__item {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--space-4);
  }

  .page-app-download .device-list__icon {
    grid-row: span 1;
    margin-top: 0;
  }

  .page-app-download .device-list__tag {
    grid-column: 3;
    margin: 0;
  }

  .page-app-download .version-section__head {
    display: grid;
    grid-template-columns: 4fr 8fr;
    gap: var(--space-8);
    max-width: none;
    align-items: end;
    margin-bottom: var(--space-8);
  }

  .page-app-download .version-section__title {
    margin: 0;
  }

  .page-app-download .version-section__lead {
    margin: 0;
  }

  .page-app-download .upgrade-section__grid {
    grid-template-columns: 8fr 4fr;
    gap: var(--space-8);
  }

  .page-app-download .exit-panel__inner {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: var(--space-4) var(--space-8);
  }

  .page-app-download .exit-panel__title {
    grid-column: 1;
    grid-row: 1 / span 2;
    font-size: var(--text-2xl);
  }

  .page-app-download .exit-panel__text {
    grid-column: 2;
    grid-row: 1;
  }

  .page-app-download .exit-panel__links {
    grid-column: 2;
    grid-row: 2;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1340px) {
  .page-app-download .band__body {
    padding-right: var(--space-8);
  }
}