nav{
    height: 80px;
    width: 100%;
    text-align: center;
    line-height: 80px;
    background: #fff;
}
nav ul{
    display: inline-block;
}
nav ul li{
    float: left;
}
nav ul li a{
    color: #707070;
    font-size: 20px;
    padding: 2px 20px;
    border-radius: 15px;
    box-sizing: border-box;
}
nav ul li.active a{
    background: #ffe4eb;
    color: #f75a7b;
}