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*::-webkit-scrollbar {  
  width: 6px;
  height: 6px;
}  
  
*::-webkit-scrollbar-thumb {  
  background: #ccc;
  border-radius: 6px;
}  
  
// 兼容IE Firefox浏览器
* {  
  scrollbar-width: thin;
  scrollbar-base-color: green;  
  scrollbar-track-color: red;  
  scrollbar-arrow-color: blue;  
}