webkit内核下滚动条修饰

只支持webkit内核浏览器

*::-webkit-scrollbar {width: 4px; /*对垂直流动条有效*/height: 4px; /*对水平流动条有效*/}
*::-webkit-scrollbar-track{-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);background-color: rgba(0,0,0,0.65);border-radius: 3px;}
*::-webkit-scrollbar-thumb{border-radius: 7px;-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);background-color: rgba(255,255,255,0.65);width: 3px;}
*::-webkit-scrollbar-button {background-color:rgba(255,255,255,0.75);height: 5px;}
*::-webkit-scrollbar-track-piece {background-color: rgba(0,0,0,0.45);}