fohow_xcx/pages/activity/screen/screen.wxss

.bg {
  position: relative;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
}
.canvas {
  position: relative;
  z-index: 1;
}
.ming {
  position: absolute;
  z-index: 99;
  left: 15rpx;
  bottom: 20rpx;
  width: 228rpx;
  height: 82rpx;
  background-color: rgba(217,217,217,0.5);
  border-radius: 82rpx;
  font-size: 32rpx;
  color: #4c4c4c;
  text-align: center;
  line-height: 82rpx;
  border: 3rpx solid #cccccc;
}
.shang {
  position: absolute;
  z-index: 99;
  left: 265rpx;
  bottom: 20rpx;
  width: 210rpx;
  height: 82rpx;
  background-color: rgba(217,217,217,0.5);
  border-radius: 82rpx;
  font-size: 32rpx;
  color: #4c4c4c;
  text-align: center;
  line-height: 82rpx;
  border: 3rpx solid #cccccc;
}
.save {
  position: absolute;
  z-index: 99;
  left: 500rpx;
  bottom: 20rpx;
  width: 228rpx;
  height: 82rpx;
  background-color: #66da9b;
  border-radius: 82rpx;
  font-size: 32rpx;
  color: #ffffff;
  text-align: center;
  line-height: 82rpx;
  border: 3rpx solid #32cf76;
}