efault">默认</button>
                        <button type="button" class="btn btn-outline btn-primary">主要</button>
                        <button type="button" class="btn btn-outline btn-success">成功</button>
                        <button type="button" class="btn btn-outline btn-info">信息</button>
                        <button type="button" class="btn btn-outline btn-warning">警告</button>
                        <button type="button" class="btn btn-outline btn-danger">危险</butto