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堆叠层级:z-index 标签书写越靠后,显示的优先级越高 设置z-index值越大显示优先级越高 12345678910111213141516div{ position:absolute; width:200px; height:200px}.box1{ background-color:pink; //不设置z-index为1的话显示的就是后设置的blu...