.sub_menu {
    padding: 0 0 0 30px;
    margin: 0;
    list-style: none;
}

.sub_menu li {
    display: block;
    position: relative;
    font-size: 24px;
    line-height: 40px;
    margin-bottom: 15px;
    transition: all .5s;
}

.sub_menu li:before {
    content: "\f105";
    font-family: fontawesome;
    position: absolute;
    left: -30px;
    top: 0;
    color: #787878;
    transition: all .5s;
}

.sub_menu li:hover:before, .sub_menu li:active:before, .sub_menu li:focus:before {
    color: #333;
}

.sub_menu li a {
    color: #787878;
    text-decoration: none;
}

.sub_menu li a:hover, .sub_menu li a:active, .sub_menu li a:focus {
    color: #333;
    text-decoration: none;
}