.box {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.btnbox {
    margin-bottom: 5px;
  button {
    margin-right: 15px;
  }
}
.selectBtn { background-color: #1890ff; color: #fff; }

.imgbox {
  width: 100%;
  height:500px;
  overflow: hidden;
  canvas{ overflow: hidden; }
  .content,center{
    width: 100%;
    height: 100%;
    overflow: hidden;
  }
}