/* 教程截图：默认更大，可点击放大 */
figure.tutorial-shot,
figure:has(img) {
  margin: 1.25rem 0;
  text-align: center;
}

figure img {
  display: block;
  width: 100%;
  max-width: min(100%, 520px);
  height: auto;
  margin: 0 auto;
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .12);
  border: 1px solid #e8e8e8;
  cursor: zoom-in;
  -webkit-tap-highlight-color: transparent;
  transition: transform .15s ease, box-shadow .15s ease;
}

figure img:active {
  transform: scale(.985);
}

figure .zoom-hint {
  display: inline-block;
  margin-top: .5rem;
  font-size: .75rem;
  color: #888;
}

figcaption {
  font-size: .8125rem;
  color: #666;
  margin-top: .55rem;
  padding: 0 .5rem;
}

@media (min-width: 480px) {
  figure img {
    max-width: min(92vw, 560px);
  }
}

@media (min-width: 768px) {
  figure img {
    max-width: 600px;
  }
}

/* 灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, .88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: max(1rem, env(safe-area-inset-top)) 1rem max(1rem, env(safe-area-inset-bottom));
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s ease, visibility .2s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 100%;
  max-height: calc(100vh - 5rem - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, .45);
  cursor: zoom-out;
}

.lightbox-cap {
  margin: .75rem 0 0;
  color: rgba(255, 255, 255, .85);
  font-size: .875rem;
  text-align: center;
  max-width: 36rem;
  line-height: 1.5;
}

.lightbox-close {
  position: absolute;
  top: max(.75rem, env(safe-area-inset-top));
  right: max(.75rem, env(safe-area-inset-right));
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, .15);
  color: #fff;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  backdrop-filter: blur(4px);
}

.lightbox-close:active {
  background: rgba(255, 255, 255, .25);
}

body.lightbox-open {
  overflow: hidden;
}