.sub {text-align:center;}

.sub img {
    margin-bottom:30px;
    width:100%;
}
.sub p {

    font-size:18px;
    margin-bottom:10px;
}
.sub b{
    font-size:20px;
}

/* tablet */
@media screen and (min-width:769px) and (max-width:991px){
}

/* mobile */
@media screen and (max-width:768px){
}