[slide style="background-image:url("http://file06.16sucai.com/2016/0108/9e8704cffd5f631eadb1b8026cf0721f.jpg")"]
使用方法：[slide style="background-image:url("http://file06.16sucai.com/2016/0108/9e8704cffd5f631eadb1b8026cf0721f.jpg")"]
完全style写法，更加灵活，视频背景、repeat背景更不在话下