.public-left-nav .el-menu-vertical-demo:hover {
    overflow-x: hidden;
    overflow-y: auto;
}


.public-left-nav .el-menu-vertical-demo:hover::-webkit-scrollbar {
    width: 8px !important;
}

.public-left-nav .el-menu-vertical-demo:hover::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2) !important;
    border: 1px solid #ccc;
    border-radius: 10px;
}

.public-left-nav .el-menu-vertical-demo:hover::-webkit-scrollbar-button {
    display: none;
}