reader/component/activityPop/index.wxss

.popBox {
  position: fixed;
  top: 0px;
  left: 0px;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 999;
  background-color: rgba(0, 0, 0, 0.46);
}
.popBox .closeImg {
  width: 46rpx;
  height: 62rpx;
  margin-top: 260rpx;
  margin-left: 75%;
}
.popBox .activityImg {
  width: 680rpx;
  height: 544rpx;
  border-radius: 20rpx;
  overflow: hidden;
}