.page-cases-featured {
  --pcf-rule-heavy: calc(var(--border-thick) * 4);
  --pcf-rule-mid: calc(var(--border-thick) * 2);
  --pcf-gap-lg: clamp(var(--space-6), 6vw, var(--space-8));
  --pcf-tag-wash: color-mix(in srgb, var(--color-accent) 12%, var(--color-surface));
}

/* ---------- 首屏 ---------- */
.page-cases-featured .pcf-hero {
  padding-block: var(--space-6) var(--space-8);
  border-bottom: var(--pcf-rule-heavy) solid var(--color-ink);
}

.page-cases-featured .pcf-kicker {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.page-cases-featured .pcf-kicker--dark {
  color: var(--color-contrast-accent);
}

.page-cases-featured .pcf-title {
  margin: 0;
  max-width: 24ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 5.6vw, var(--text-3xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-cases-featured .pcf-lede {
  max-width: var(--measure);
  margin-top: var(--space-4);
  color: var(--color-ink-soft);
}

.page-cases-featured .pcf-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: var(--space-8) 0 0;
  border-top: var(--pcf-rule-mid) solid var(--color-ink);
}

.page-cases-featured .pcf-fact {
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases-featured .pcf-fact dt {
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-cases-featured .pcf-fact dd {
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-cases-featured .pcf-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 引言两栏 ---------- */
.page-cases-featured .pcf-lead-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-cases-featured .pcf-lead-grid .prose {
  max-width: var(--measure);
  margin: 0;
}

/* ---------- 视觉块与展签 ---------- */
.page-cases-featured .pcf-figure {
  margin: var(--space-6) 0 0;
}

.page-cases-featured .pcf-figure--tight {
  margin-top: 0;
}

.page-cases-featured .pcf-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--color-surface-deep);
}

.page-cases-featured .pcf-figure .caption {
  margin-top: var(--space-2);
}

/* ---------- 镜像对照 ---------- */
.page-cases-featured .pcf-mirror {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: var(--space-8);
  border-top: var(--pcf-rule-heavy) solid var(--color-ink);
  border-bottom: var(--pcf-rule-heavy) solid var(--color-ink);
}

.page-cases-featured .pcf-spine {
  display: none;
}

.page-cases-featured .pcf-col {
  padding: var(--space-6) var(--space-3);
}

.page-cases-featured .pcf-col--ios {
  background: var(--color-surface-alt);
}

.page-cases-featured .pcf-col--pro {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--pcf-rule-heavy) solid var(--color-ink);
}

.page-cases-featured .pcf-col-label {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.page-cases-featured .pcf-col--pro .pcf-col-label {
  color: var(--color-contrast-accent);
}

.page-cases-featured .pcf-col-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-cases-featured .pcf-col--pro .pcf-col-title {
  color: var(--color-contrast-ink);
}

.page-cases-featured .pcf-col-list {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-cases-featured .pcf-col-list li {
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases-featured .pcf-col--pro .pcf-col-list li {
  border-top-color: var(--color-contrast-line);
}

.page-cases-featured .pcf-item-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-body);
  font-weight: var(--weight-body);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-cases-featured .pcf-col--pro .pcf-item-title {
  color: var(--color-contrast-ink);
}

.page-cases-featured .pcf-item-text {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.page-cases-featured .pcf-col--pro .pcf-item-text {
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

/* ---------- 导出入口区 ---------- */
.page-cases-featured .pcf-export-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-cases-featured .pcf-export-body {
  min-width: 0;
}

.page-cases-featured .pcf-svg {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin-bottom: var(--space-4);
  color: var(--color-ink-muted);
}

.page-cases-featured .pcf-svg-frame {
  stroke: var(--color-line);
  stroke-width: 1;
}

.page-cases-featured .pcf-svg-btn {
  stroke: var(--color-accent);
  stroke-width: 2.5;
}

.page-cases-featured .pcf-svg-chip {
  stroke: var(--color-primary);
  stroke-width: 1;
}

.page-cases-featured .pcf-svg-text {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--color-ink);
}

.page-cases-featured .pcf-svg-note {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--color-ink-muted);
}

.page-cases-featured .pcf-format-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--pcf-rule-mid) solid var(--color-ink);
}

.page-cases-featured .pcf-format-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases-featured .pcf-format-code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-lg);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.page-cases-featured .pcf-export-note {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  color: var(--color-ink-soft);
}

/* ---------- 使用情境 ---------- */
.page-cases-featured .pcf-scenes {
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--pcf-rule-mid) solid var(--color-ink);
}

.page-cases-featured .pcf-scene {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases-featured .pcf-tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

.page-cases-featured .pcf-tag--ios {
  color: var(--color-ink-soft);
  background: var(--color-primary-soft);
}

.page-cases-featured .pcf-tag--pro {
  color: var(--color-accent);
  background: var(--pcf-tag-wash);
}

.page-cases-featured .pcf-tag--both {
  color: var(--color-ink-muted);
  background: var(--color-surface-deep);
}

.page-cases-featured .pcf-scene-title {
  margin: 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-cases-featured .pcf-scene-text {
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 页面边界 ---------- */
.page-cases-featured .pcf-boundary {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--pcf-rule-heavy) solid var(--color-ink);
}

.page-cases-featured .pcf-boundary li {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases-featured .pcf-boundary-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-cases-featured .pcf-boundary-text {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
}

.page-cases-featured .pcf-link {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--pcf-rule-mid) solid var(--color-accent);
  padding-bottom: 1px;
}

.page-cases-featured .pcf-link:hover,
.page-cases-featured .pcf-link:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

.page-cases-featured .pcf-link--dark {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.page-cases-featured .pcf-link--dark:hover,
.page-cases-featured .pcf-link--dark:focus-visible {
  color: var(--color-contrast-ink);
  border-bottom-color: var(--color-contrast-ink);
}

/* ---------- 行动出口 ---------- */
.page-cases-featured .pcf-exit {
  padding: var(--space-6) var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--pcf-rule-heavy) solid var(--color-accent);
}

.page-cases-featured .pcf-exit-title {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-lg), 4vw, var(--text-2xl));
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-cases-featured .pcf-exit-text {
  max-width: var(--measure);
  margin: var(--space-3) 0 var(--space-4);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--color-contrast-ink);
  opacity: 0.84;
}

.page-cases-featured .pcf-exit .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--space-6);
  padding: var(--space-2) var(--space-4);
  border: var(--pcf-rule-mid) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.3;
  text-decoration: none;
}

.page-cases-featured .pcf-exit .btn:hover,
.page-cases-featured .pcf-exit .btn:focus-visible {
  border-color: var(--color-contrast-ink);
}

.page-cases-featured .pcf-exit .btn--accent {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.page-cases-featured .pcf-exit .btn--accent:hover,
.page-cases-featured .pcf-exit .btn--accent:focus-visible {
  background: var(--color-contrast-ink);
  border-color: var(--color-contrast-ink);
  color: var(--color-contrast-surface);
}

.page-cases-featured .pcf-exit-contact {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-cases-featured .pcf-col {
    padding: var(--space-6) var(--space-4);
  }

  .page-cases-featured .pcf-format-list li {
    grid-template-columns: minmax(0, 96px) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }

  .page-cases-featured .pcf-exit {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 720px) {
  .page-cases-featured .pcf-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-cases-featured .pcf-fact {
    padding: var(--space-4) var(--space-3);
    border-bottom: 0;
    border-left: var(--border-thin) solid var(--color-line);
  }

  .page-cases-featured .pcf-fact:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-cases-featured .pcf-lead-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-cases-featured .pcf-mirror {
    grid-template-columns: minmax(0, 1fr) 4px minmax(0, 1fr);
  }

  .page-cases-featured .pcf-spine {
    display: block;
    background: var(--color-contrast-line);
  }

  .page-cases-featured .pcf-col--pro {
    border-top: 0;
  }

  .page-cases-featured .pcf-export-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--pcf-gap-lg);
    align-items: start;
  }

  .page-cases-featured .pcf-scene {
    grid-template-columns: minmax(0, 120px) minmax(0, 26ch) minmax(0, 1fr);
    gap: var(--space-4);
    align-items: baseline;
  }

  .page-cases-featured .pcf-boundary li {
    grid-template-columns: minmax(0, 160px) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: baseline;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-cases-featured [data-reveal] {
    transition: opacity 200ms linear;
    transform: none;
  }

  .page-cases-featured .pcf-mirror,
  .page-cases-featured .pcf-col,
  .page-cases-featured .pcf-tag {
    transition: none;
  }
}