.index-category-nav {
    /*border-top: 1px dotted #666;*/
    border-top: none!important;
    margin-bottom: 25px;
}

.index-category-nav li {
    box-sizing: border-box;
    width: 200px;
    height: 48px;
    /* border-bottom: 1px dotted #666; */
    border-bottom: none!important;
    float: left;
}