.page-app-download {
  --client-rail-w: 44px;
  --client-line-x: 22px;
  --client-dur: 200ms;
}

/* ---------- 面包屑与首屏 ---------- */

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

.page-app-download .client-hero {
  padding-block: var(--space-6) var(--space-8);
}

.page-app-download .client-hero__eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin: 0 0 var(--space-2);
}

.page-app-download .client-hero__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
  overflow-wrap: break-word;
}

.page-app-download .client-hero__lede {
  max-width: 58ch;
  margin: 0 0 var(--space-6);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .client-hero__grid {
  display: grid;
  gap: var(--space-4);
  align-items: stretch;
}

.page-app-download .client-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  box-shadow: var(--shadow-1);
  background: var(--color-surface-alt);
}

.page-app-download .client-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-app-download .client-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--border-thin);
  background: var(--color-line);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-app-download .client-stat {
  background: var(--color-surface-alt);
  padding: var(--space-3) var(--space-2);
  display: grid;
  align-content: start;
  gap: calc(var(--space-1) / 2);
  min-width: 0;
}

.page-app-download .client-stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-ink);
}

.page-app-download .client-stat--accent .client-stat__num {
  color: var(--color-accent);
  text-shadow: 0 0 26px color-mix(in srgb, var(--color-accent) 40%, transparent);
}

.page-app-download .client-stat__label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.page-app-download .client-stat__note {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-muted);
}

/* ---------- 分组跳转带 ---------- */

.page-app-download .client-jump {
  border-block: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
}

.page-app-download .client-jump__list {
  display: flex;
  gap: var(--space-3);
  margin: 0;
  padding: var(--space-2) 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-app-download .client-jump__link {
  display: inline-block;
  white-space: nowrap;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  padding: calc(var(--space-1) / 2) 0;
  border-bottom: var(--border-thick) solid transparent;
  transition: color var(--client-dur) ease, border-color var(--client-dur) ease;
}

.page-app-download .client-jump__link:hover,
.page-app-download .client-jump__link:focus-visible {
  color: var(--color-ink);
  border-bottom-color: var(--color-accent);
}

.page-app-download .client-jump__link.is-active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 分组骨架 ---------- */

.page-app-download .client-group {
  padding-block: var(--section-y);
}

.page-app-download .client-group__head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.page-app-download .client-group__index {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin: 0 0 var(--space-1);
}

.page-app-download .client-group__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: -0.015em;
  color: var(--color-ink);
  margin: 0;
}

.page-app-download .client-group__desc {
  margin: 0;
  max-width: 62ch;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

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

.page-app-download .client-group__media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
  align-self: start;
}

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

.page-app-download .client-group__cap {
  display: block;
  padding: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .client-group__band {
  margin: 0 0 var(--space-4);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
}

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

/* ---------- 步骤时间轴 ---------- */

.page-app-download .client-steps {
  position: relative;
  display: grid;
  gap: var(--space-3);
}

.page-app-download .client-steps::before {
  content: "";
  position: absolute;
  left: var(--client-line-x);
  top: var(--space-3);
  bottom: var(--space-3);
  width: var(--border-thin);
  background: linear-gradient(
    180deg,
    var(--color-accent) 0%,
    color-mix(in srgb, var(--color-primary) 60%, var(--color-line)) 22%,
    var(--color-line) 78%,
    transparent 100%
  );
  opacity: 0.85;
  pointer-events: none;
}

.page-app-download .client-step {
  position: relative;
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color var(--client-dur) ease, box-shadow var(--client-dur) ease;
}

.page-app-download .client-step[open] {
  border-color: color-mix(in srgb, var(--color-primary) 55%, var(--color-line));
  box-shadow: 0 0 22px color-mix(in srgb, var(--color-primary) 18%, transparent);
}

.page-app-download .client-step > summary {
  display: grid;
  grid-template-columns: var(--client-rail-w) minmax(0, 1fr);
  align-items: center;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
  cursor: pointer;
  list-style: none;
  outline: none;
}

.page-app-download .client-step > summary::-webkit-details-marker {
  display: none;
}

.page-app-download .client-step > summary:focus-visible {
  box-shadow: 0 0 0 var(--border-thick) var(--color-focus);
  border-radius: var(--radius-md);
}

.page-app-download .client-step__num {
  position: relative;
  z-index: 1;
  width: var(--client-rail-w);
  height: var(--client-rail-w);
  display: grid;
  place-items: center;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink-muted);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: color var(--client-dur) ease, background var(--client-dur) ease, border-color var(--client-dur) ease;
}

.page-app-download .client-step[open] .client-step__num {
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 18px color-mix(in srgb, var(--color-accent) 45%, transparent);
}

.page-app-download .client-step__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.3;
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.page-app-download .client-step__flag {
  grid-column: 2;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  justify-self: start;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: 2px var(--space-1);
}

.page-app-download .client-step__body {
  padding: 0 var(--space-3) var(--space-4) calc(var(--client-rail-w) + var(--space-3));
  display: grid;
  gap: var(--space-2);
}

.page-app-download .client-step__action {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink);
  line-height: var(--leading-body);
}

.page-app-download .client-step__warn {
  margin: 0;
  max-width: var(--measure);
  padding: var(--space-2);
  background: var(--color-primary-soft);
  border-left: var(--border-thick) solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink);
}

.page-app-download .client-step__check {
  margin: 0;
  max-width: var(--measure);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.page-app-download .client-step__check-tag {
  flex: none;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-accent) 45%, transparent);
  border-radius: var(--radius-pill);
  padding: 1px var(--space-1);
}

/* ---------- 浅底对照块 ---------- */

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

.page-app-download .client-block__inner {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  display: grid;
  gap: var(--space-4);
}

.page-app-download .client-block__head {
  display: grid;
  gap: var(--space-2);
  max-width: 74ch;
}

.page-app-download .client-block__index {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-app-download .client-block__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: -0.012em;
  color: var(--color-contrast-ink);
}

.page-app-download .client-block__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-app-download .client-block__desc a {
  color: var(--color-contrast-accent);
  text-underline-offset: 3px;
}

.page-app-download .client-block__figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.page-app-download .client-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
}

.page-app-download .client-table__cap {
  caption-side: top;
  text-align: left;
  padding-bottom: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
}

.page-app-download .client-table th,
.page-app-download .client-table td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-app-download .client-table thead th {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  border-bottom: var(--border-thick) solid var(--color-contrast-line);
}

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

/* ---------- 故障排查 ---------- */

.page-app-download .client-faults-section {
  padding-block: var(--section-y);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .client-faults__head {
  max-width: 68ch;
  margin-bottom: var(--space-6);
}

.page-app-download .client-faults__index {
  margin: 0 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-app-download .client-faults__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: -0.015em;
  color: var(--color-ink);
}

.page-app-download .client-faults__desc {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-app-download .client-faults {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-app-download .client-fault {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-3);
}

.page-app-download .client-fault__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.page-app-download .client-fault__num {
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-app-download .client-fault__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.page-app-download .client-fault__fold {
  margin-top: var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
}

.page-app-download .client-fault__fold > summary {
  padding: var(--space-2);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  list-style: none;
}

.page-app-download .client-fault__fold > summary::-webkit-details-marker {
  display: none;
}

.page-app-download .client-fault__fold > summary::after {
  content: " +";
  color: var(--color-primary);
}

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

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

.page-app-download .client-fault__fold .pg-fold__body {
  padding: 0 var(--space-2) var(--space-3);
  display: grid;
  gap: var(--space-1);
}

.page-app-download .client-fault__text {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

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

.page-app-download .client-fault__text a {
  color: var(--color-accent);
  text-underline-offset: 3px;
}

/* ---------- 收尾 ---------- */

.page-app-download .client-outro {
  padding-block: var(--space-8) var(--section-y);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-app-download .client-outro__index {
  margin: 0 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-app-download .client-outro__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.page-app-download .client-outro__text {
  margin: 0 0 var(--space-2);
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-app-download .client-outro__text a {
  color: var(--color-accent);
  text-underline-offset: 3px;
}

.page-app-download .client-outro__side {
  align-self: start;
}

.page-app-download .client-outro__facts {
  list-style: none;
  margin: 0 0 var(--space-2);
  padding: 0;
  display: grid;
  gap: var(--space-1);
}

.page-app-download .client-outro__facts li {
  display: grid;
  gap: calc(var(--space-1) / 2);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink);
}

.page-app-download .client-outro__key {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

.page-app-download .client-outro__foot {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-app-download .client-step > summary {
    grid-template-columns: var(--client-rail-w) minmax(0, 1fr) auto;
    padding-right: var(--space-3);
  }

  .page-app-download .client-step__flag {
    grid-column: 3;
    justify-self: end;
  }
}

@media (min-width: 768px) {
  .page-app-download .client-group__head {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
    gap: var(--gutter);
  }

  .page-app-download .client-block__inner {
    padding: var(--space-6);
  }

  .page-app-download .client-outro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--gutter);
    align-items: start;
  }

  .page-app-download .client-outro__facts li {
    grid-template-columns: 7rem minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-2);
  }
}

@media (min-width: 900px) {
  .page-app-download .client-hero {
    padding-block: var(--space-8) var(--space-8);
  }

  .page-app-download .client-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--gutter);
  }

  .page-app-download .client-stat__num {
    font-size: var(--text-figure);
  }

  .page-app-download .client-group__split {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: var(--gutter);
  }

  .page-app-download .client-group__head {
    margin-bottom: var(--space-8);
  }

  .page-app-download .client-steps::before {
    left: var(--client-line-x);
  }

  .page-app-download .client-faults {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--gutter);
  }
}

@media (max-width: 719px) {
  .page-app-download .client-block__inner {
    padding: var(--space-2);
  }

  .page-app-download .client-table,
  .page-app-download .client-table tbody,
  .page-app-download .client-table tr,
  .page-app-download .client-table th,
  .page-app-download .client-table td {
    display: block;
    width: 100%;
  }

  .page-app-download .client-table thead {
    display: none;
  }

  .page-app-download .client-table tr {
    border: var(--border-thin) solid var(--color-contrast-line);
    border-radius: var(--radius-sm);
    padding: var(--space-2);
    margin-bottom: var(--space-2);
  }

  .page-app-download .client-table tbody th {
    white-space: normal;
    font-size: var(--text-lg);
    padding: 0 0 var(--space-1);
    margin-bottom: var(--space-1);
    border-bottom: var(--border-thin) solid var(--color-contrast-line);
  }

  .page-app-download .client-table tbody td {
    border-bottom: 0;
    padding: 0 0 var(--space-1);
  }

  .page-app-download .client-table tbody td::before {
    content: attr(data-label);
    display: block;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    color: var(--color-contrast-accent);
    margin-bottom: calc(var(--space-1) / 4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download .client-step,
  .page-app-download .client-step__num,
  .page-app-download .client-jump__link {
    transition: none;
  }
}