.nav {
    margin-bottom:2px;
}
.nav ul li {
    float: left;
    width: 33.33%;
    text-align: center;
    background: #0c5ba0;
    line-height: 0.4rem;
    border-bottom: 2px solid #fff;
    border-right: 2px solid #fff;
}
.nav ul li:nth-child(3n){
    border-right: 0;
}
.nav ul li:nth-child(4),.nav ul li:nth-child(5),.nav ul li:nth-child(6){
    border-bottom: 0;
}
.nav ul li a {
    color: #fff;
    font-size: 14px;
}