/* ==========================================================
   page: app-download  ( /get-app/ )
   作用域：.page-app-download
   ========================================================== */

.page-app-download {
  --ad-index-w: 224px;
  --ad-path-cut: 26px;
  background: var(--color-surface);
  color: var(--color-ink);
  overflow-x: hidden;
}

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

.page-app-download .ad-hero a:focus-visible {
  outline-color: var(--color-contrast-accent);
}

/* ---------- 首屏 ---------- */

.page-app-download .ad-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: calc(var(--space-8) * 2.6) 0 var(--space-8);
}

.page-app-download .ad-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    112deg,
    transparent 0 44px,
    color-mix(in srgb, var(--color-contrast-accent) 10%, transparent) 44px 45px
  );
  pointer-events: none;
}

.page-app-download .ad-hero__inner {
  position: relative;
  z-index: 1;
}

.page-app-download .ad-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.68;
  margin-bottom: var(--space-4);
}

.page-app-download .ad-crumb a {
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 160ms ease;
}

.page-app-download .ad-crumb a:hover {
  border-bottom-color: var(--color-contrast-accent);
}

.page-app-download .ad-kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-app-download .ad-kicker::before {
  content: "";
  width: var(--space-3);
  height: var(--border-thick);
  background: var(--color-contrast-accent);
}

.page-app-download .ad-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: 1.02;
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary-ink);
}

.page-app-download .ad-hero__lead {
  margin: var(--space-4) 0 0;
  max-width: 52ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

/* ---------- 四条路径色块阵列 ---------- */

.page-app-download .ad-paths {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  margin-top: var(--space-8);
}

.page-app-download .ad-path {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 184px;
  padding: var(--space-3) var(--space-3) var(--space-6);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - var(--ad-path-cut)));
  transition: transform 160ms ease;
}

.page-app-download .ad-path:hover {
  transform: translateX(2px);
}

.page-app-download .ad-path--a {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-app-download .ad-path--b {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-app-download .ad-path--c {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-app-download .ad-path--d {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-app-download .ad-path__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  opacity: 0.72;
}

.page-app-download .ad-path__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.22;
  letter-spacing: var(--tracking-heading);
}

.page-app-download .ad-path__desc {
  margin: auto 0 0;
  font-size: var(--text-sm);
  line-height: 1.5;
  opacity: 0.88;
}

/* ---------- 首屏数字锚点 ---------- */

.page-app-download .ad-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-app-download .ad-figure__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 0.92;
  color: var(--color-contrast-accent);
}

.page-app-download .ad-figure__unit {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-contrast-ink);
  opacity: 0.76;
}

/* ---------- 图片 ---------- */

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

.page-app-download .ad-shot {
  margin: 0;
}

.page-app-download .ad-shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-app-download .ad-shot--hero img { aspect-ratio: 1220 / 520; }
.page-app-download .ad-shot--mobile img { aspect-ratio: 880 / 660; }
.page-app-download .ad-shot--prepare img { aspect-ratio: 1000 / 500; }
.page-app-download .ad-shot--version img { aspect-ratio: 760 / 480; }

.page-app-download .ad-shot__cap {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-muted);
}

/* ---------- 正文骨架：左窄右宽 ---------- */

.page-app-download .ad-body {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

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

.page-app-download .ad-index__inner {
  border-top: var(--border-thick) solid var(--color-primary);
  padding-top: var(--space-2);
}

.page-app-download .ad-index__label {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-app-download .ad-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
}

.page-app-download .ad-index__list a {
  display: inline-block;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.page-app-download .ad-index__list a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-accent);
  transform: translateX(2px);
}

/* ---------- 分组 ---------- */

.page-app-download .ad-group {
  scroll-margin-top: var(--space-8);
}

.page-app-download .ad-group + .ad-group {
  margin-top: var(--space-8);
}

.page-app-download .ad-group__head {
  border-top: var(--border-thick) solid var(--color-primary);
  padding-top: var(--space-3);
}

.page-app-download .ad-group--alt .ad-group__head {
  border-top-color: var(--color-accent);
}

.page-app-download .ad-group__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-app-download .ad-group__title {
  margin: var(--space-1) 0 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: 1.14;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .ad-group__intro {
  margin: var(--space-2) 0 0;
  max-width: 58ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 条目陈列 ---------- */

.page-app-download .ad-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-app-download .ad-item {
  position: relative;
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color 160ms ease, transform 160ms ease, background-color 160ms ease;
}

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

.page-app-download .ad-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--border-thick);
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform 160ms ease;
}

.page-app-download .ad-item:hover,
.page-app-download .ad-item:focus-within {
  border-color: var(--color-accent);
  transform: translateX(2px);
}

.page-app-download .ad-item:hover::before,
.page-app-download .ad-item:focus-within::before {
  transform: scaleY(1);
}

.page-app-download .ad-tag {
  display: inline-block;
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.5;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-app-download .ad-tag--alt {
  background: var(--color-highlight);
}

.page-app-download .ad-item__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.24;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .ad-item__body {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-points {
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  max-width: var(--measure);
}

.page-app-download .ad-points li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: var(--space-2);
  height: var(--border-thin);
  background: var(--color-accent);
}

.page-app-download .ad-points strong {
  margin-right: var(--space-1);
  font-weight: 700;
  color: var(--color-ink);
}

/* 分组内图片 */

.page-app-download .ad-group > .ad-shot {
  margin-top: var(--space-4);
}

/* ---------- 准备清单：可展开 ---------- */

.page-app-download .ad-list--fold {
  gap: var(--space-1);
}

.page-app-download .ad-fold {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: border-color 160ms ease, background-color 160ms ease;
}

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

.page-app-download .ad-fold[open] {
  border-color: var(--color-accent);
  background: var(--color-highlight);
}

.page-app-download .ad-fold > summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
}

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

.page-app-download .ad-fold__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  flex: none;
}

.page-app-download .ad-fold__title {
  flex: 1 1 auto;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.24;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .ad-fold > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1;
  color: var(--color-accent);
}

.page-app-download .ad-fold[open] > summary::after {
  content: "-";
}

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

/* ---------- 结尾出口 ---------- */

.page-app-download .ad-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-app-download .ad-exit {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-ink);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 20px));
  transition: border-color 160ms ease, transform 160ms ease, background-color 160ms ease;
}

.page-app-download .ad-exit:hover {
  border-color: var(--color-accent);
  background: var(--color-highlight);
  transform: translateX(2px);
}

.page-app-download .ad-exit__tag {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-app-download .ad-exit__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.2;
  letter-spacing: var(--tracking-heading);
}

.page-app-download .ad-exit__desc {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-note {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
  border-left: var(--border-thick) solid var(--color-primary);
  padding-left: var(--space-2);
}

.page-app-download .link-inline {
  color: var(--color-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: border-color 160ms ease, color 160ms ease;
}

.page-app-download .link-inline:hover {
  color: var(--color-focus);
  border-bottom-color: var(--color-accent);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-app-download .ad-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-app-download .ad-item {
    padding: var(--space-4) var(--space-4);
  }

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

  .page-app-download .ad-figures {
    grid-template-columns: repeat(3, auto);
    justify-content: end;
    gap: var(--space-8);
  }
}

@media (min-width: 1024px) {
  .page-app-download .ad-paths {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-app-download .ad-layout {
    grid-template-columns: var(--ad-index-w) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-app-download .ad-index__inner {
    position: sticky;
    top: var(--space-8);
  }

  .page-app-download .ad-index__list {
    flex-direction: column;
    gap: var(--space-1);
  }

  .page-app-download .ad-index__list a {
    display: block;
    padding: var(--space-1) 0;
    border-bottom-color: var(--color-line);
  }

  .page-app-download .ad-body {
    padding-top: var(--section-y-lg);
    padding-bottom: var(--section-y-lg);
  }

  .page-app-download .ad-shot-band {
    padding-top: var(--space-8);
  }
}

@media (min-width: 1280px) {
  .page-app-download .ad-item__title {
    max-width: 34ch;
  }

  .page-app-download .ad-exit {
    padding: var(--space-4) var(--space-4) var(--space-6);
  }
}