.page-app-download {
  --apk-cut: 18px;
  --apk-panel-shadow: 5px 5px 0 var(--color-ink);
}

/* ---------- 面包屑 ---------- */
.page-app-download .apk-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  padding: var(--space-2) 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-app-download .apk-crumbs li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.page-app-download .apk-crumbs li + li::before {
  content: "／";
  color: var(--color-line);
}

.page-app-download .apk-crumbs a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
}

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

/* ---------- 首屏 ---------- */
.page-app-download .apk-hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-6) 0 var(--space-8);
  background: linear-gradient(155deg, var(--color-surface) 0%, var(--color-surface-alt) 58%, var(--color-surface-deep) 100%);
}

.page-app-download .apk-hero::after {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: -3px;
  height: 13px;
  background: var(--color-accent);
  transform: skewY(-0.7deg);
  transform-origin: left bottom;
}

.page-app-download .apk-hero-grid {
  display: grid;
  gap: var(--space-6);
}

.page-app-download .apk-hero-title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 0.95;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-app-download .apk-hero-lede {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
  margin: 0;
}

/* 三张斜切面板 */
.page-app-download .apk-hero-stack {
  display: grid;
  gap: var(--space-4);
}

.page-app-download .apk-panel {
  position: relative;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-left: 0;
  padding: var(--space-3);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--apk-cut)), 0 100%);
  filter: drop-shadow(var(--apk-panel-shadow));
}

.page-app-download .apk-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--border-thick);
  background: var(--color-primary);
}

.page-app-download .apk-panel--b::before {
  background: var(--color-accent);
}

.page-app-download .apk-panel-num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--color-primary);
  margin: 0 0 var(--space-1);
}

.page-app-download .apk-panel--b .apk-panel-num {
  color: var(--color-accent);
}

.page-app-download .apk-panel-label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-app-download .apk-panel-lines {
  list-style: none;
  margin: 0;
  padding: var(--space-2) 0 0;
  border-top: 1px dashed var(--color-line);
  display: grid;
  gap: var(--space-1);
}

.page-app-download .apk-panel-lines li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-app-download .apk-panel-lines li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: var(--space-1);
  height: 1px;
  background: var(--color-primary);
}

.page-app-download .apk-panel--b .apk-panel-lines li::before {
  background: var(--color-accent);
}

.page-app-download .apk-hero-figure {
  margin-top: var(--space-3);
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

/* ---------- 版本谱系 ---------- */
.page-app-download .apk-arc {
  background: var(--color-surface);
}

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

.page-app-download .apk-timeline {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0 0 0 var(--space-4);
  border-left: var(--border-thin) dashed var(--color-line);
  display: grid;
  gap: var(--space-4);
}

.page-app-download .apk-tl-item {
  position: relative;
  display: grid;
  gap: var(--space-1);
}

.page-app-download .apk-tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-4) - 4px);
  top: 0.45em;
  width: var(--space-1);
  height: var(--space-1);
  background: var(--color-primary);
  transform: rotate(45deg);
}

.page-app-download .apk-tl-tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.18em;
  color: var(--color-primary);
}

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

.page-app-download .apk-tl-desc {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

/* ---------- 条目目录 ---------- */
.page-app-download .apk-catalog {
  position: relative;
  background: var(--color-surface-alt);
  padding-top: calc(var(--section-y) + var(--space-4));
}

.page-app-download .apk-catalog::before {
  content: "";
  position: absolute;
  top: calc(-1 * var(--space-3));
  left: 0;
  right: 0;
  height: var(--space-3);
  background: var(--color-surface-alt);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

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

.page-app-download .apk-catalog-grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-app-download .apk-cat + .apk-cat {
  margin-top: var(--space-6);
}

.page-app-download .apk-cat-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .apk-cat-code {
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-accent);
}

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

.page-app-download .apk-entry {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  margin: 0 calc(-1 * var(--space-2));
  border-top: 1px dashed var(--color-line);
  transition: background-color 180ms ease;
}

.page-app-download .apk-entry:hover {
  background: var(--color-highlight);
}

.page-app-download .apk-entry-no {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  min-width: 2.4ch;
}

.page-app-download .apk-entry-main {
  min-width: 0;
}

.page-app-download .apk-entry-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.page-app-download .apk-entry-title {
  flex: 1 1 60%;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .apk-entry-desc {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: 1.62;
  color: var(--color-ink-soft);
}

.page-app-download .apk-entry-more {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 220ms ease, opacity 220ms ease;
}

.page-app-download .apk-entry-more > p {
  overflow: hidden;
  margin: 0;
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--color-accent);
  line-height: 1.6;
}

.page-app-download .apk-entry:hover .apk-entry-more,
.page-app-download .apk-entry:focus-within .apk-entry-more {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: var(--space-2);
}

/* 分类索引 */
.page-app-download .apk-index {
  border: var(--border-thin) dashed var(--color-line);
  background: var(--color-surface);
  padding: var(--space-3);
}

.page-app-download .apk-index-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

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

.page-app-download .apk-index-list a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--color-line);
  transition: color 160ms ease, transform 160ms ease;
}

.page-app-download .apk-index-list a:hover {
  color: var(--color-accent);
  transform: translateX(3px);
}

.page-app-download .apk-index-list a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-app-download .apk-index-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
}

.page-app-download .apk-index-note {
  margin: var(--space-2) 0 0;
}

/* ---------- 运行环境 ---------- */
.page-app-download .apk-env {
  background: var(--color-surface);
}

.page-app-download .apk-env-grid {
  display: grid;
  gap: var(--space-6);
}

.page-app-download .apk-env-img {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

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

.page-app-download .apk-env-list {
  margin: var(--space-4) 0 0;
  display: grid;
  gap: 0;
}

.page-app-download .apk-env-item {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-top: 1px dashed var(--color-line);
}

.page-app-download .apk-env-item dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.14em;
  color: var(--color-accent);
}

.page-app-download .apk-env-item dd {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-app-download .apk-env-tail {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-app-download .apk-env-tail a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
}

/* ---------- 字段对照 ---------- */
.page-app-download .apk-fields-grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.page-app-download .apk-table-cap {
  caption-side: bottom;
  text-align: left;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  padding-top: var(--space-2);
}

.page-app-download .apk-fields-img {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

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

.page-app-download .apk-fields-cap {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--color-primary);
  line-height: 1.6;
}

/* ---------- 校验与纠错 ---------- */
.page-app-download .apk-verify {
  background: var(--color-surface-alt);
}

.page-app-download .apk-verify-grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

.page-app-download .apk-verify-steps {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-app-download .apk-verify-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-line);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-app-download .apk-step-no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}

.page-app-download .apk-verify-tail {
  margin: var(--space-4) 0 0;
  padding: var(--space-3);
  background: var(--color-surface);
  border-left: var(--border-thick) solid var(--color-accent);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-app-download .apk-verify-tail a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px dashed currentColor;
}

.page-app-download .apk-verify-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

/* ---------- 延伸入口 ---------- */
.page-app-download .apk-more {
  background: var(--color-surface);
}

.page-app-download .apk-more-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-app-download .apk-more-item {
  padding: var(--space-3) 0;
  border-top: 1px dashed var(--color-line);
}

.page-app-download .apk-more-item a {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.page-app-download .apk-more-item a:hover {
  color: var(--color-primary);
}

.page-app-download .apk-more-item a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-app-download .apk-more-item .meta {
  margin: var(--space-2) 0 0;
  line-height: 1.6;
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 900px) {
  .page-app-download .apk-hero {
    padding: var(--space-8) 0 var(--section-y);
  }

  .page-app-download .apk-hero-grid {
    grid-template-columns: 6fr 6fr;
    gap: var(--space-8);
    align-items: start;
  }

  .page-app-download .apk-hero-stack {
    gap: var(--space-2);
  }

  .page-app-download .apk-panel--a {
    margin-right: 14%;
  }

  .page-app-download .apk-panel--b {
    margin-left: 12%;
    margin-right: 2%;
  }

  .page-app-download .apk-panel--c {
    margin-left: 24%;
  }

  .page-app-download .apk-catalog-grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-app-download .apk-index {
    position: sticky;
    top: var(--space-4);
  }

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

  .page-app-download .apk-fields-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-app-download .apk-verify-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
  }
}

/* ---------- 宽屏微调 ---------- */
@media (min-width: 1200px) {
  .page-app-download .apk-catalog-intro {
    margin-top: var(--space-3);
  }

  .page-app-download .apk-entry {
    gap: var(--space-4);
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 560px) {
  .page-app-download .apk-entry {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
  }

  .page-app-download .apk-entry-no {
    font-size: var(--text-base);
  }

  .page-app-download .apk-timeline {
    padding-left: var(--space-3);
  }

  .page-app-download .apk-tl-item::before {
    left: calc(-1 * var(--space-3) - 4px);
  }

  .page-app-download .apk-verify-steps li {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-app-download .apk-entry,
  .page-app-download .apk-entry-more,
  .page-app-download .apk-index-list a {
    transition: none;
  }

  .page-app-download .apk-index-list a:hover {
    transform: none;
  }

  .page-app-download .apk-hero::after {
    transform: none;
  }
}