/* ───── reveal.css — 滚动渐入 ─────
   .reveal 进入视口由 reveal.js 加 .visible 触发淡入上移。reduced-motion 时直接显示。 */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}