wx-parent/components/float/float.wxss

.float-home {
  position: fixed;
  right: 30rpx;
  bottom: 200rpx;
  width: 100rpx;
  height: 100rpx;
  display: flex;
  flex-direction: column;
  justify-content: center;  /* 垂直居中 */
  align-items: center;      /* 水平居中 */
  border-radius: 12rpx;
  box-shadow: 0 4rpx 12rpx rgba(0, 0, 0, 0.3);
  background-color: #ffffff;
  font-size: 28rpx;
  z-index: 999;
}