/* 背景 */
#background-wrapper {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  overflow: hidden;
  z-index: 0;
  display: none;
  background-color: #000;
  pointer-events: none;
}
#background {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 云层容器 */
#clouds-wrapper {
  position: fixed;
  bottom:0; left:0;
  width:100%;
  height:95vh;
  overflow:hidden;
  display: none;
  pointer-events:none;
  z-index:1;
}
.clouds-image {
  position: absolute;
  bottom:0;
  height:100%;
  object-fit: cover;
  flex-shrink: 0;
}

/* 手写动画容器 */
.animation-container {
  position: fixed;
  top: 50%;
  left: 52%;
  transform: translate(-50%, -50%);
  z-index: 2;
  width: 90%;
  max-width: 1920px;
  height: auto;
  display: none;
  z-index: 2;
  pointer-events: none;
  opacity: 0; /* 初始隐藏，等待图片加载 */
}

.animated-image {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: auto;
  display: block;
}

/* PNG 初始隐藏 */
#png {
  opacity: 0;
}