.sub_nav {
    position: relative;
    width: 100%;
    height: 88px;
    background-color: #3590b2;
}

.sub_nav .blocks {
    width: 80%;
    height: 100%;
    margin: auto;
}

.sub_nav .block {
    width: 32%;
    height: 100%;
    background-color: #3590b2;
    transition: all 0.5s ease 0s;
    -webkit-transition: all 0.5s ease 0s;
    -moz-transition: all 0.5s ease 0s;
    -o-transition: all 0.5s ease 0s;
}

.sub_nav .block:not(:first-child) {
    width: calc(32% + 1px);
    border-left: solid 1px #242a37;
}

.sub_nav .block span {
    display: inline-block;
    width: 100%;
    height: 88px;
    line-height: 88px;
    text-align: center;
    font-size: 20px;
    color: white;
    cursor: pointer;
}

.block:hover {
    background-color: #082b47;
}