.active {
    color: red!important;
}
.logo-img {
    width: 200px;
}
.index-banner {
    height: 450px;
}
@media screen and (max-width: 800px) {
    .logo-img {
        width: 100px;
    }
    .el-select {
        width: 70px;
    }
    .index-banner {
        height: auto;
    }
}

 li {
     list-style-type:none;
     margin-top: 10px;
     margin-bottom: 10px;
    }