.page-app-download {
  --app-panel-border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 26%, transparent);
  --app-panel-border-strong: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 62%, transparent);
  --app-row-line: var(--border-thin) solid var(--color-line);
}

/* ---------- 首屏 ---------- */
.page-app-download .app-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--section-y-lg) var(--section-y);
}

.page-app-download .app-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(62% 55% at 82% 8%, color-mix(in srgb, var(--color-primary) 34%, transparent), transparent 72%),
    radial-gradient(46% 46% at 6% 92%, color-mix(in srgb, var(--color-accent) 12%, transparent), transparent 72%);
}

.page-app-download .app-hero .shell {
  position: relative;
  z-index: 1;
}

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

.page-app-download .app-hero__title {
  margin: var(--space-3) 0 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);
  color: var(--color-ink);
  text-shadow: 0 0 34px color-mix(in srgb, var(--color-primary) 48%, transparent);
}

.page-app-download .app-hero__lead {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .app-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding-top: var(--space-3);
  border-top: var(--app-row-line);
}

.page-app-download .app-stat {
  margin: 0;
}

.page-app-download .app-stat dt {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

.page-app-download .app-stat dd {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: var(--space-1) 0 0;
}

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

.page-app-download .app-stat__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-app-download .app-hero__frame {
  border: var(--app-panel-border);
  box-shadow: var(--shadow-1);
}

@media (min-width: 640px) {
  .page-app-download .app-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-app-download .app-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 5fr);
    gap: var(--gutter);
    align-items: end;
  }
}

/* ---------- 区块头部 ---------- */
.page-app-download .app-section-head {
  max-width: var(--measure);
}

.page-app-download .app-section-head__title {
  margin: var(--space-3) 0 0;
  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);
  color: var(--color-ink);
  text-shadow: 0 0 22px color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.page-app-download .app-section-head__lead {
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 版本通道 ---------- */
.page-app-download .app-channels__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-app-download .app-channel {
  position: relative;
  padding: var(--space-3);
  border: var(--app-panel-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  box-shadow: var(--shadow-1);
  transition: border-color 260ms ease, box-shadow 260ms ease;
}

.page-app-download .app-channel:hover,
.page-app-download .app-channel:focus-within {
  border-color: color-mix(in srgb, var(--color-primary) 64%, transparent);
  box-shadow: 0 0 26px color-mix(in srgb, var(--color-primary) 26%, transparent);
}

.page-app-download .app-channel__name {
  margin: var(--space-2) 0 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 .app-channel__desc {
  margin: var(--space-2) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .app-channel__spec {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: var(--app-row-line);
}

.page-app-download .app-channel__spec > div {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
}

.page-app-download .app-channel__spec dt {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

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

.page-app-download .app-channel__spec dd .num {
  color: var(--color-accent);
}

.page-app-download .app-channel--big {
  border-color: color-mix(in srgb, var(--color-accent) 34%, transparent);
}

@media (min-width: 880px) {
  .page-app-download .app-channels__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.34fr);
    gap: var(--space-4);
    align-items: start;
  }

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

  .page-app-download .app-channel--lite {
    margin-top: var(--space-3);
  }
}

/* ---------- 安装准备 ---------- */
.page-app-download .app-prep__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-app-download .app-prep__frame {
  aspect-ratio: 1 / 1;
  border: var(--app-panel-border);
  border-radius: var(--radius-lg);
}

.page-app-download .app-prep__list {
  display: grid;
  gap: var(--space-2);
}

.page-app-download .app-prep__item {
  position: relative;
  padding-left: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  border: var(--app-panel-border);
  overflow: hidden;
}

.page-app-download .app-prep__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-3);
  bottom: var(--space-3);
  width: var(--border-thick);
  background: linear-gradient(180deg, var(--color-accent), color-mix(in srgb, var(--color-accent) 12%, transparent));
}

.page-app-download .app-prep__item[open] {
  border-color: var(--app-panel-border-strong);
}

.page-app-download .app-prep__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
}

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

.page-app-download .app-prep__sum::marker {
  content: "";
}

.page-app-download .app-prep__no {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-primary);
}

.page-app-download .app-prep__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .app-prep__state {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: 0 var(--space-1);
}

.page-app-download .app-prep__state::after {
  content: "待核对";
}

.page-app-download .app-prep__item[open] .app-prep__state {
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.page-app-download .app-prep__item[open] .app-prep__state::after {
  content: "已确认";
}

.page-app-download .app-prep__body {
  margin: 0 var(--space-3) var(--space-3);
  padding-top: var(--space-2);
  border-top: var(--app-row-line);
  display: grid;
  gap: var(--space-1);
}

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

.page-app-download .app-prep__why {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.page-app-download .app-env {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
}

.page-app-download .app-env__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  align-items: baseline;
  padding: var(--space-2) 0;
  border-bottom: var(--app-row-line);
}

.page-app-download .app-env__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-app-download .app-env__name {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-ink);
}

.page-app-download .app-env__note {
  grid-column: 2 / -1;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

@media (min-width: 760px) {
  .page-app-download .app-env__row {
    grid-template-columns: 3.5em minmax(0, 1fr) minmax(0, 1.35fr);
  }

  .page-app-download .app-env__note {
    grid-column: auto;
  }
}

@media (min-width: 900px) {
  .page-app-download .app-prep__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: var(--gutter);
    align-items: start;
  }
}

/* ---------- 六步轨道 ---------- */
.page-app-download .app-track-wrap {
  position: relative;
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
}

.page-app-download .app-track-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-app-download .app-track-bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
}

.page-app-download .app-track {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

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

.page-app-download .app-step__box {
  background: var(--color-surface-alt);
  border: var(--app-panel-border);
  border-radius: var(--radius-md);
  transition: border-color 240ms ease, box-shadow 240ms ease;
}

.page-app-download .app-step__box:hover {
  border-color: color-mix(in srgb, var(--color-primary) 56%, transparent);
}

.page-app-download .app-step__box[open] {
  border-color: var(--app-panel-border-strong);
  box-shadow: 0 0 30px color-mix(in srgb, var(--color-primary) 22%, transparent);
}

.page-app-download .app-step__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
}

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

.page-app-download .app-step__sum::marker {
  content: "";
}

.page-app-download .app-step__no {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-accent);
}

.page-app-download .app-step__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .app-step__cue {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-ink-muted);
}

.page-app-download .app-step__cue::before {
  content: "+";
}

.page-app-download .app-step__box[open] .app-step__cue {
  color: var(--color-primary);
}

.page-app-download .app-step__box[open] .app-step__cue::before {
  content: "−";
}

.page-app-download .app-step__body {
  margin: 0 var(--space-3) var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--app-row-line);
  display: grid;
  gap: var(--space-2);
}

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

.page-app-download .app-step__note {
  position: relative;
  margin: 0;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .app-step__note::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4em;
  bottom: 0.4em;
  width: var(--border-thick);
  background: var(--color-accent);
  box-shadow: 0 0 10px color-mix(in srgb, var(--color-accent) 55%, transparent);
}

.page-app-download .app-step__check {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-app-download .app-step__check .tag {
  padding: 0 var(--space-1);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

@media (min-width: 820px) {
  .page-app-download .app-track-wrap {
    padding: var(--space-6) var(--space-4);
  }

  .page-app-download .app-track {
    padding-left: var(--space-6);
  }

  .page-app-download .app-track::before {
    content: "";
    position: absolute;
    left: var(--space-2);
    top: var(--space-2);
    bottom: var(--space-2);
    width: var(--border-thin);
    background: linear-gradient(180deg, color-mix(in srgb, var(--color-accent) 72%, transparent), transparent 88%);
  }
}

@media (min-width: 1000px) {
  .page-app-download .app-track > .app-step:nth-child(2) {
    margin-left: var(--space-1);
  }

  .page-app-download .app-track > .app-step:nth-child(3) {
    margin-left: calc(var(--space-1) * 2);
  }

  .page-app-download .app-track > .app-step:nth-child(4) {
    margin-left: calc(var(--space-1) * 3);
  }

  .page-app-download .app-track > .app-step:nth-child(5) {
    margin-left: calc(var(--space-1) * 4);
  }

  .page-app-download .app-track > .app-step:nth-child(6) {
    margin-left: calc(var(--space-1) * 5);
  }
}

/* ---------- 结果确认与排查 ---------- */
.page-app-download .app-check__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

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

.page-app-download .app-check__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding-bottom: var(--space-3);
  border-bottom: var(--app-row-line);
}

.page-app-download .app-check__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-app-download .app-check__no {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-accent);
}

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

.page-app-download .app-check__text {
  margin: var(--space-1) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .app-check__visual {
  border: var(--app-panel-border);
  border-radius: var(--radius-lg);
}

.page-app-download .app-trouble {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-app-download .app-trouble__item {
  position: relative;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  border: var(--app-panel-border);
  border-left-color: var(--color-accent);
}

.page-app-download .app-trouble__no {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

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

.page-app-download .app-trouble__text {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

@media (min-width: 720px) {
  .page-app-download .app-trouble {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

@media (min-width: 900px) {
  .page-app-download .app-check__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--gutter);
    align-items: start;
  }
}

/* ---------- 延伸阅读 ---------- */
.page-app-download .app-next__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
}

.page-app-download .app-next__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-top: var(--app-row-line);
}

.page-app-download .app-next__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-app-download .app-next__link {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 200ms ease;
}

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

.page-app-download .app-next__desc {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 滚动显现 ---------- */
.js .page-app-download [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 320ms ease, transform 320ms ease;
  transition-delay: var(--reveal-delay, 0ms);
}

.js .page-app-download [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .page-app-download [data-reveal],
  .js .page-app-download [data-reveal].is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-app-download .app-channel,
  .page-app-download .app-step__box,
  .page-app-download .app-next__link {
    transition: none;
  }
}

.page-app-download {
  --reveal-delay: 0.3s;
}