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

/* ---------- 顶部索引条 ---------- */
.page-app-download .ad-index {
  border-bottom: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
}

.page-app-download .ad-index__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  padding: var(--space-2) 0;
}

.page-app-download .ad-index__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: var(--border-thin) solid transparent;
}

.page-app-download .ad-index__link:hover,
.page-app-download .ad-index__link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

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

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

.page-app-download .ad-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 72px;
  background: var(--color-surface);
  clip-path: polygon(0 100%, 100% 18%, 100% 100%);
  pointer-events: none;
}

.page-app-download .ad-hero__wedge {
  position: absolute;
  top: -12%;
  right: -8%;
  width: 48%;
  height: 124%;
  background: var(--color-primary);
  opacity: 0.16;
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-app-download .ad-hero__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 3px,
    color-mix(in srgb, var(--color-contrast-ink) 5%, transparent) 3px 4px
  );
  opacity: 0.7;
}

.page-app-download .ad-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-8);
}

.page-app-download .ad-hero .eyebrow {
  color: var(--color-contrast-accent);
}

.page-app-download .ad-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 0.94;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  margin: var(--space-2) 0 0;
}

.page-app-download .ad-hero__mark {
  display: block;
  width: 108px;
  height: 12px;
  margin-top: var(--space-3);
  background: var(--color-primary);
  transform: skewX(-24deg);
}

.page-app-download .ad-hero__lede {
  margin: var(--space-4) 0 0;
  max-width: 48ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.page-app-download .ad-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
  padding: var(--space-3) 0 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
  list-style: none;
}

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

.page-app-download .ad-figures__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.35;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-app-download .ad-hero__footnote {
  margin: var(--space-4) 0 0;
  max-width: 54ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.68;
}

/* 首屏五格缩略 */
.page-app-download .ad-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
  align-content: start;
}

.page-app-download .ad-strip__cell {
  padding: var(--space-2) var(--space-3);
  background: color-mix(in srgb, var(--color-contrast-ink) 9%, transparent);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-app-download .ad-strip__name {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.01em;
  color: var(--color-contrast-ink);
}

.page-app-download .ad-strip__meta {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-contrast-accent);
}

/* ---------- 通用区块头 ---------- */
.page-app-download .ad-head {
  max-width: 62ch;
}

.page-app-download .ad-head h2 {
  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);
  margin: var(--space-2) 0 var(--space-3);
}

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

.page-app-download .ad-head--dark h2 {
  color: var(--color-contrast-ink);
}

.page-app-download .ad-head--dark p {
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-app-download .ad-head--dark .eyebrow {
  color: var(--color-contrast-accent);
}

/* ---------- 形态陈列 ---------- */
.page-app-download .ad-forms {
  padding: var(--section-y) 0;
  background: var(--color-surface);
}

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

.page-app-download .ad-group__title {
  display: inline-block;
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-primary);
}

.page-app-download .ad-entry {
  display: grid;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

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

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

.page-app-download .ad-spec {
  display: grid;
  gap: 0;
  margin: var(--space-3) 0 0;
  padding: 0;
}

.page-app-download .ad-spec__row {
  display: grid;
  grid-template-columns: 4.5em minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-app-download .ad-spec__row dt {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

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

.page-app-download .ad-entry__start {
  margin: var(--space-3) 0 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary-soft);
  border-left: var(--border-thick) solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-app-download .ad-entry__start strong {
  color: var(--color-primary);
  margin-right: 0.4em;
}

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

.page-app-download .ad-entry__media .media__img {
  box-shadow: var(--shadow-2);
}

.page-app-download .ad-entry__media .media__caption,
.page-app-download .ad-bigscreen__media .media__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

/* ---------- 大屏区块 ---------- */
.page-app-download .ad-bigscreen {
  position: relative;
  margin-top: var(--space-8);
  padding: var(--space-8) 0 var(--space-8);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-app-download .ad-bigscreen::before {
  content: "";
  position: absolute;
  top: -26px;
  left: 0;
  right: 0;
  height: 26px;
  background: var(--color-contrast-surface);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-app-download .ad-bigscreen .ad-entry {
  border-top-color: var(--color-contrast-line);
}

.page-app-download .ad-entry--dark .ad-entry__name {
  color: var(--color-contrast-ink);
}

.page-app-download .ad-entry--dark .ad-spec__row {
  border-top-color: var(--color-contrast-line);
}

.page-app-download .ad-entry--dark .ad-spec__row dt {
  color: var(--color-contrast-accent);
}

.page-app-download .ad-entry--dark .ad-spec__row dd {
  color: var(--color-contrast-ink);
  opacity: 0.92;
}

.page-app-download .ad-entry--dark .ad-entry__start {
  background: color-mix(in srgb, var(--color-primary) 26%, transparent);
  border-left-color: var(--color-primary);
  color: var(--color-contrast-ink);
}

.page-app-download .ad-entry--dark .ad-entry__start strong {
  color: var(--color-contrast-accent);
}

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

.page-app-download .ad-bigscreen__media .media__img {
  box-shadow: var(--shadow-2);
}

.page-app-download .ad-bigscreen__media .media__caption {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* ---------- 设备对照 ---------- */
.page-app-download .ad-compare {
  padding: var(--section-y) 0;
  background: var(--color-surface-alt);
}

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

.page-app-download .ad-table__row {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-2);
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background 180ms ease;
}

.page-app-download .ad-table__row:nth-child(odd) {
  background: color-mix(in srgb, var(--color-surface-deep) 45%, var(--color-surface));
}

.page-app-download .ad-table__row--head {
  display: none;
}

.page-app-download .ad-table__cell {
  display: block;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-table__name {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-app-download .ad-table__k {
  display: block;
  margin-bottom: 2px;
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 首次进入前 ---------- */
.page-app-download .ad-prepare {
  padding: var(--section-y) 0;
  background: var(--color-surface);
}

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

.page-app-download .ad-checklist {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-app-download .ad-checklist__item {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-6);
  background: var(--color-surface-alt);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-checklist__item::before {
  content: "";
  position: absolute;
  left: var(--space-3);
  top: calc(var(--space-3) + 0.5em);
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  transform: skewX(-18deg);
}

.page-app-download .ad-checklist__item strong {
  display: block;
  margin-bottom: 2px;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-app-download .ad-switch-box {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-deep);
  border-left: var(--border-thick) solid var(--color-accent);
}

.page-app-download .ad-switch-box__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

.page-app-download .ad-switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.page-app-download .ad-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-app-download .ad-switch__track {
  position: relative;
  flex: none;
  width: 48px;
  height: 24px;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  transition: background 180ms ease, border-color 180ms ease;
}

.page-app-download .ad-switch__track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: var(--color-ink-muted);
  transform: skewX(-12deg);
  transition: transform 180ms ease, background 180ms ease;
}

.page-app-download .ad-switch__input:checked + .ad-switch__track {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-app-download .ad-switch__input:checked + .ad-switch__track::after {
  transform: translateX(23px) skewX(-12deg);
  background: var(--color-primary);
}

.page-app-download .ad-switch__input:focus-visible + .ad-switch__track {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

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

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

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

.page-app-download .ad-prepare__aside .media__img {
  box-shadow: var(--shadow-1);
}

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

.page-app-download .ad-aside__card {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-app-download .ad-aside__card h3 {
  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 .ad-aside__card p {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-app-download .ad-aside__card p:last-child {
  margin-bottom: 0;
}

.page-app-download .ad-inline-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-app-download .ad-inline-link:hover,
.page-app-download .ad-inline-link:focus-visible {
  color: var(--color-primary);
}

.page-app-download .ad-inline-link:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 从哪一步开始 ---------- */
.page-app-download .ad-start {
  padding: var(--section-y) 0 var(--space-8);
  background: var(--color-surface);
}

.page-app-download .ad-start__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-6) var(--space-4);
}

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

.page-app-download .ad-start__item:nth-child(1) {
  border-top-color: var(--color-primary);
}

.page-app-download .ad-start__item:nth-child(3) {
  border-top-color: var(--color-accent);
}

.page-app-download .ad-start__cond {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-ink-muted);
}

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

/* ---------- 结尾行动区 ---------- */
.page-app-download .ad-cta {
  margin-top: var(--space-8);
  padding: var(--space-6) var(--space-4);
  background: var(--color-highlight);
  border-left: var(--border-thick) solid var(--color-accent);
}

.page-app-download .ad-cta__eyebrow {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

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

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

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

/* ---------- 桌面增强 ---------- */
@media (min-width: 721px) {
  .page-app-download .ad-strip {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: var(--space-3) var(--space-3);
  }

  .page-app-download .ad-strip__cell:nth-child(1),
  .page-app-download .ad-strip__cell:nth-child(2) {
    grid-column: span 3;
  }

  .page-app-download .ad-strip__cell:nth-child(3) {
    grid-column: 1 / span 2;
  }

  .page-app-download .ad-strip__cell:nth-child(4) {
    grid-column: 3 / span 2;
    margin-top: var(--space-3);
  }

  .page-app-download .ad-strip__cell:nth-child(5) {
    grid-column: 5 / span 2;
    margin-top: calc(var(--space-3) * 2);
  }

  .page-app-download .ad-figures__value {
    font-size: var(--text-2xl);
  }
}

@media (min-width: 880px) {
  .page-app-download .ad-entry {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-app-download .ad-entry--flip .ad-entry__body {
    order: 2;
  }

  .page-app-download .ad-entry--flip .ad-entry__media {
    order: 1;
  }

  .page-app-download .ad-head h2 {
    font-size: var(--text-3xl);
  }

  .page-app-download .ad-table__row {
    grid-template-columns: 1.1fr 1fr 1.35fr 1.75fr;
    gap: var(--space-3);
    align-items: start;
    padding: var(--space-3);
  }

  .page-app-download .ad-table__row--head {
    display: grid;
    background: transparent;
    padding-bottom: var(--space-2);
    border-bottom: var(--border-thin) solid var(--color-ink);
  }

  .page-app-download .ad-table__row--head .ad-table__col {
    font-size: var(--text-xs);
    font-weight: var(--weight-heading);
    letter-spacing: 0.1em;
    color: var(--color-ink-muted);
  }

  .page-app-download .ad-table__k {
    display: none;
  }

  .page-app-download .ad-table__row:hover,
  .page-app-download .ad-table__row:focus-within {
    background: var(--color-primary-soft);
  }

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

  .page-app-download .ad-start__item:nth-child(even) {
    margin-top: var(--space-4);
  }

  .page-app-download .ad-cta {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 960px) {
  .page-app-download .ad-hero {
    padding: var(--space-8) 0 calc(var(--section-y) + 24px);
  }

  .page-app-download .ad-hero__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-app-download .ad-prepare__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--space-8);
  }
}

@media (min-width: 1080px) {
  .page-app-download .ad-start__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-app-download .ad-table__row,
  .page-app-download .ad-switch__track,
  .page-app-download .ad-switch__track::after {
    transition: none;
  }
}