reader/components/createPoster/index.wxss

.mediaBox {
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.35);
}
.mediaBox .btns {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
  padding: 25rpx 60rpx;
  padding-bottom: calc(env(safe-area-inset-bottom) + 25rpx);
  background-color: white;
}
.mediaBox .btns .btn {
  width: 275rpx;
  padding: 13rpx 0;
  text-align: center;
  font-size: 32rpx;
  color: #FFFFFF;
  background: linear-gradient(180deg, #6EC8FF 0%, #31BDFE 100%);
  box-shadow: 0rpx 6rpx 4rpx 0rpx rgba(0, 0, 0, 0.08);
  border-radius: 39rpx;
}
/* 转圈动画 */
@keyframes falsh-identifier {
  0% {
    transform: rotate(0deg) scale(0.7);
  }
  50% {
    transform: rotate(180deg) scale(1);
  }
  100% {
    transform: rotate(360deg) scale(0.7);
  }
}
@keyframes falsh-scale {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}