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console 命令行工具 X clear 

                    

                        
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console

            
<div></div>

            
div{
  width:200px;
  height:100px;
  background: linear-gradient(180deg,hsla(0,0%,100%,.95),hsla(0,0%,100%,.6)),linear-gradient(0deg,hsla(0,0%,100%,.95),hsla(0,0%,100%,.6));
background-position: top,bottom;
}