.li{position: relative;}
.ul{    position: absolute;
display:none;
    left: 100%;
    top: 0;
    width: 100%;
    background-color: #b72024;}
.li:hover .ul{display:block;}
.dh{      float: left;
    transition: all .5s ease;
    -moz-transition: all .5s ease;
    -o-transition: all .5s ease;
    -webkit-transition: all .5s ease;
    width: 25%;
    line-height: 45px;
    border: 1px solid #dedede;
    border-radius: 4px;
    margin: 0 12%;
    text-align: center;}
    .dh a{color: #4b4b4b;
    font-size: 15px;
    display: block;
    text-align: center;
    padding: 0 8px;}
    
    .dh:hover {
    box-shadow: inset 450px 0 0 0 #b72024;
    -moz-box-shadow: inset 450px 0 0 0 #b72024;
    -webkit-box-shadow: inset 450px 0 0 0 #b72024;
    border: 1px solid #b72024;}    .dh:hover a {color: #fff;}
.dh:hover a{transition: all .3s ease;
    -moz-transition: all .3s ease;
    -o-transition: all .3s ease;
    -webkit-transition: all .3s ease;
    text-decoration: none;
    outline: 0;}