.c_nav > li{
    position: relative;}
.c_nav > li a{
    position: relative;}
.sub {
    position: absolute;
    top: 80%;
    left: 50%;
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    -o-transform: translateX(-50%);
    transform: translateX(-50%);
    min-width: 160px;
    background-color: #fff;
    -webkit-box-shadow: 0 0 10px rgba(0,0,0,.3);
    -moz-box-shadow: 0 0 10px rgba(0,0,0,.3);
    box-shadow: 0 0 10px rgba(0,0,0,.3);
    display: none;
    border-top: 2px solid #076ecb
;}

.sub .v2 {
    text-align: center;
    display: block;
    font-size: 14px;
    padding: 5px;
    background: #fff;
    -webkit-transition: .3s;
    -o-transition: .3s;
    -moz-transition: .3s;
    transition: .3s;
    line-height: 30px
;}

.sub .v2:hover {
    background: rgba(7,110,203,.8);
    color: #fff
;}