好看的 滚动条

/*设置*/
.scroll-bar {
    overflow: auto;
    overflow-y: overlay;
}
.scroll-bar::-webkit-scrollbar-track{
    background-color: #f5f5f5;
    -webit-box-shadow: inset 0 0 6px rgba(0,0,0,0.22);
    border-radius: 4px;
}
.scroll-bar::-webkit-scrollbar{
    width: 6px;
    height: 6px;
    background-color: #f1f1f1;
    -webkit-box-shadow: inset 0 0 6px raba(0,0,0,0.22);
    border-radius: 15px;
}
.scroll-bar::-webkit-scrollbar-thumb{
    background-color: #a8a8a8;
    border-radius: 4px;
    height: 30px;
}