我目前正在尝试更改网站的CSS，但无法更改CSS以使图像变白。
网站和我的进度的屏幕截图：http://prntscr.com/o2gvbc 如您所见，突出显示的图像非常暗，我想将其设置为白色，因此该图像没有当前的CSS属性。
这是受影响区域的html代码：
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两个小时以来，我一直在努力寻找方法，而我正处于放弃的边缘。