自有图片上传（图片格式要求 bmp，jpg，png，tif，psd，cdr，eps，ai）
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规格
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必填字段
{"height":"0","width":"0","background-color":"#FFF","background-image":"none","background-position":"50% 50%","background-repeat":"no-repeat","background-gradient-top":"none","background-gradient-bottom":"none","background-scroll":"none","background-size":"auto","themeColorName":"","margin-top":"8","margin-left":"0","margin-right":"0","margin-bottom":"0"}
