.sider{
    background: #fff;
    width: 200px;
    padding: 10px;
    border-radius: 10px;
}
.sider ul li{
    margin: 10px 0;
}

.sider ul li a{
    color: #000;
    text-decoration: none;

}
.sider ul li a:hover{
    color:#190569;
}