.page-comparison {
  background: var(--color-surface-alt);
}

/* ---------- 首屏 ---------- */
.page-comparison .cmp-hero {
  background: var(--color-surface);
  padding-block: var(--space-3) var(--section-y);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-comparison .cmp-hero .breadcrumb {
  margin-bottom: var(--space-4);
}

.page-comparison .cmp-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-comparison .cmp-hero__kicker::before {
  content: "";
  display: block;
  width: 28px;
  height: var(--border-thin);
  background: var(--color-accent);
}

.page-comparison .cmp-hero__title {
  margin: 0 0 var(--space-3);
  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);
  max-width: 16ch;
}

.page-comparison .cmp-hero__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-comparison .cmp-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--border-thin);
  background: var(--color-contrast-line);
  border: var(--border-thin) solid var(--color-contrast-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.page-comparison .cmp-stats__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-contrast-surface);
}

.page-comparison .cmp-stats__num {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-accent);
}

.page-comparison .cmp-stats__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.4;
  color: var(--color-contrast-ink);
}

.page-comparison .cmp-hero__figure {
  margin: 0 0 var(--space-4);
}

.page-comparison .cmp-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 双表并列 ---------- */
.page-comparison .cmp-pair {
  display: grid;
  gap: var(--space-3);
}

.page-comparison .cmp-table-card {
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  overflow: hidden;
}

.page-comparison .cmp-table-card__head {
  padding: var(--space-3);
}

.page-comparison .cmp-table-card--android .cmp-table-card__head {
  background: var(--color-primary);
}

.page-comparison .cmp-table-card--desktop .cmp-table-card__head {
  background: var(--color-contrast-surface);
}

.page-comparison .cmp-table-card__tag {
  display: inline-block;
  margin-bottom: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
}

.page-comparison .cmp-table-card--android .cmp-table-card__tag {
  background: var(--color-primary-ink);
  color: var(--color-primary);
}

.page-comparison .cmp-table-card--desktop .cmp-table-card__tag {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.page-comparison .cmp-table-card__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}

.page-comparison .cmp-table-card--android .cmp-table-card__title {
  color: var(--color-primary-ink);
}

.page-comparison .cmp-table-card--desktop .cmp-table-card__title {
  color: var(--color-contrast-ink);
}

.page-comparison .cmp-table-card__meta {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.page-comparison .cmp-table-card--android .cmp-table-card__meta {
  color: var(--color-primary-ink);
  opacity: 0.78;
}

.page-comparison .cmp-table-card--desktop .cmp-table-card__meta {
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-comparison .cmp-table-card__scroll {
  overflow-x: auto;
}

.page-comparison .cmp-mini {
  width: 100%;
  min-width: 300px;
}

.page-comparison .cmp-mini th,
.page-comparison .cmp-mini td {
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  white-space: nowrap;
}

.page-comparison .cmp-pair__note {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-accent);
}

/* ---------- 长文档骨架 ---------- */
.page-comparison .cmp-doc {
  display: grid;
  gap: var(--space-6);
  align-items: start;
  padding-block: var(--section-y);
}

.page-comparison .cmp-doc__main {
  display: grid;
  gap: var(--space-6);
  align-content: start;
  min-width: 0;
}

.page-comparison .cmp-toc {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: var(--space-3);
}

.page-comparison .cmp-toc__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-comparison .cmp-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-1);
}

.page-comparison .cmp-toc__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  border-left: var(--border-thin) solid transparent;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-soft);
  text-decoration: none;
}

.page-comparison .cmp-toc__link .mono {
  color: var(--color-accent);
  font-size: var(--text-xs);
}

.page-comparison .cmp-toc__link:hover {
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-comparison .cmp-toc__link:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 章节 ---------- */
.page-comparison .cmp-sec {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
}

.page-comparison .cmp-sec__head {
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-comparison .cmp-sec__no {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-accent);
}

.page-comparison .cmp-sec__title {
  margin: 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);
}

.page-comparison .cmp-sec__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 字段列表 ---------- */
.page-comparison .cmp-fields {
  margin: 0;
  display: grid;
}

.page-comparison .cmp-fields__row {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-comparison .cmp-fields__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-comparison .cmp-fields__key {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-ink);
}

.page-comparison .cmp-fields__key .mono {
  font-size: var(--text-xs);
  color: var(--color-accent);
}

.page-comparison .cmp-fields__val {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 标签页 ---------- */
.page-comparison .cmp-tabs {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-comparison .cmp-tabs .tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-comparison .cmp-tabs .tab {
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  cursor: pointer;
}

.page-comparison .cmp-tabs .tab[aria-selected="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-comparison .cmp-tabs .tab:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

.page-comparison .cmp-tabs .tab-panel[hidden] {
  display: none;
}

.page-comparison .cmp-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: cmp-step;
  display: grid;
  gap: var(--space-2);
}

.page-comparison .cmp-steps li {
  position: relative;
  padding-left: var(--space-6);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  counter-increment: cmp-step;
}

.page-comparison .cmp-steps li::before {
  content: counter(cmp-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}

/* ---------- 字段差异行 ---------- */
.page-comparison .cmp-diff__figure {
  margin: 0 0 var(--space-4);
}

.page-comparison .cmp-diff__figure img {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
}

.page-comparison .cmp-diff {
  display: grid;
}

.page-comparison .cmp-diff__row {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-comparison .cmp-diff__row:last-child {
  border-bottom: 0;
}

.page-comparison .cmp-diff__side {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color 160ms ease;
}

.page-comparison .cmp-diff__side--a {
  border-left: var(--border-thin) solid var(--color-primary);
}

.page-comparison .cmp-diff__side--b {
  border-left: var(--border-thin) solid var(--color-accent);
}

.page-comparison .cmp-diff__row:hover .cmp-diff__side,
.page-comparison .cmp-diff__row:focus-within .cmp-diff__side {
  background: var(--color-highlight);
}

.page-comparison .cmp-diff__label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.page-comparison .cmp-diff__side--a .cmp-diff__label {
  color: var(--color-primary);
}

.page-comparison .cmp-diff__side--b .cmp-diff__label {
  color: var(--color-accent);
}

.page-comparison .cmp-diff__val {
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-comparison .cmp-diff__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 版本追溯 ---------- */
.page-comparison .cmp-ver__layout {
  display: grid;
  gap: var(--space-4);
}

.page-comparison .cmp-ver__figure {
  margin: 0;
}

.page-comparison .cmp-ver__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-comparison .cmp-ver__list {
  display: grid;
  align-content: start;
  min-width: 0;
}

.page-comparison .cmp-ver__item {
  position: relative;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  margin-top: calc(var(--space-2) * -0.5);
}

.page-comparison .cmp-ver__item:first-child {
  margin-top: 0;
}

.page-comparison .cmp-ver__item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  cursor: pointer;
  list-style: none;
}

.page-comparison .cmp-ver__item summary::-webkit-details-marker {
  display: none;
}

.page-comparison .cmp-ver__item summary:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * -1);
}

.page-comparison .cmp-ver__no {
  display: inline-block;
  min-width: 52px;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  text-align: center;
  letter-spacing: 0.04em;
}

.page-comparison .cmp-ver__name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-comparison .cmp-ver__count {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-comparison .cmp-ver__subs {
  margin: 0;
  padding: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-comparison .cmp-ver__subs li {
  display: flex;
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-comparison .cmp-ver__subs .mono {
  flex: 0 0 auto;
  color: var(--color-accent);
}

/* ---------- 小结 ---------- */
.page-comparison .cmp-sec__head--invert {
  border-bottom-color: var(--color-contrast-line);
}

.page-comparison .cmp-sec__head--invert .cmp-sec__no {
  color: var(--color-contrast-accent);
}

.page-comparison .cmp-sec__head--invert .cmp-sec__title {
  color: var(--color-contrast-ink);
}

.page-comparison .cmp-order {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.page-comparison .cmp-order__item {
  display: grid;
  gap: var(--space-1);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-comparison .cmp-order__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-comparison .cmp-order__no {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-comparison .cmp-order__text {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-comparison .cmp-exits {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-comparison .cmp-exits__lead {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

.page-comparison .cmp-exits__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-comparison .cmp-exits__list li {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-comparison .cmp-exits__list a {
  color: var(--color-contrast-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-comparison .cmp-exits__list a:hover {
  text-decoration-thickness: 2px;
}

.page-comparison .cmp-exits__list a:focus-visible {
  outline: var(--border-thin) solid var(--color-contrast-accent);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-comparison .cmp-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-comparison .cmp-sec {
    padding: var(--space-6);
  }

  .page-comparison .cmp-fields__row {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: var(--space-4);
    align-items: baseline;
  }

  .page-comparison .cmp-diff__row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-comparison .cmp-diff__note {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-comparison .cmp-pair {
    grid-template-columns: 7fr 5fr;
    gap: 0;
    align-items: stretch;
  }

  .page-comparison .cmp-pair > .cmp-table-card:first-child {
    padding-right: var(--space-4);
    border-right: var(--border-thin) solid var(--color-accent);
    background: transparent;
    border-top: 0;
    border-left: 0;
    border-bottom: 0;
  }

  .page-comparison .cmp-pair > .cmp-table-card:last-child {
    padding-left: var(--space-4);
    background: transparent;
    border: 0;
  }

  .page-comparison .cmp-diff__row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.35fr);
    gap: var(--space-3);
    align-items: center;
  }

  .page-comparison .cmp-diff__note {
    grid-column: auto;
  }
}

@media (min-width: 1080px) {
  .page-comparison .cmp-doc {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: var(--space-8);
  }

  .page-comparison .cmp-toc {
    position: sticky;
    top: var(--space-4);
  }

  .page-comparison .cmp-ver__layout {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }

  .page-comparison .cmp-ver__figure {
    position: sticky;
    top: var(--space-4);
  }

  .page-comparison .cmp-sec__title {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-comparison .cmp-diff__side {
    transition: none;
  }
}