纯CSS修改滚动条样式

::-webkit-scrollbar-track-piece {
	background-color:#f5f5f5;
	border-left:1px solid #d2d2d2;
}
::-webkit-scrollbar {
	width:3px;
	height:13px;
}
::-webkit-scrollbar-thumb {
	background-color:#c2c2c2;
	background-clip:padding-box;
	border:1px solid #979797;
	min-height:28px;
}
::-webkit-scrollbar-thumb:hover {
	border:1px solid #636363;
	background-color:#929292;
}