body{
  position: fixed;
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow-x: hidden;
  background-color: black;
}
.main{
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  flex-direction: column;
}

.menu{
  position: absolute;
  top: 0.7rem;
  left: 0.55rem;
  width: 0.72rem;
  height: 0.72rem;
  z-index: 3;
}

.back-icon{
  position: relative;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.back-img{
  position: relative;
  width: 100%;
  height: 100%;
}

.share{
  position: absolute;
  bottom: 0.5rem;
  width: 2.87rem;
  height: 0.63rem;
  z-index: 3;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
  font-size: 0.3rem;
  letter-spacing: 0.05rem;
  animation: blink 2s infinite;
}

.share-img{
  position: relative;
  width: 100%;
}

#output{
  position: relative;
  width: 100%;
}

/* 闪烁动画 */
@keyframes blink {
  0% {
      opacity: 1;
  }
  50% {
      opacity: 0.5;
  }
  100% {
      opacity: 1;
  }
}