@media screen and (min-width: 480px) {
    body.node-type-article article .field-story-body figure[style*="float:right"] {
         margin: 0 0 20px 20px;
    }
        body.node-type-article article .field-story-body figure[style*="float:left"] {
         margin: 0 20px 20px 0;
    }
}