body::-webkit-scrollbar{
    /*滚动条整体样式*/
    width : 15px;  /*高宽分别对应横竖滚动条的尺寸*/
    height: 1px;
}
body::-webkit-scrollbar-thumb {
    /*滚动条里面小方块*/
    border-radius   : 15px;
    background-color: crimson;
    background-image: -webkit-linear-gradient(
            45deg,
            rgba(255, 255, 255, 0.2) 25%,
            transparent 25%,
            transparent 50%,
            rgba(255, 255, 255, 0.2) 50%,
            rgba(255, 255, 255, 0.2) 75%,
            transparent 75%,
            transparent
    );
}
body::-webkit-scrollbar-track {
    /*滚动条里面轨道*/
    box-shadow   : inset 0 0 5px rgba(0, 0, 0, 0.2);
    background   : #ededed;
    border-radius: 10px;
}