.single-noticia-destaque {
    float: left;
    margin: 0 30px 15px 0;
}
.single-noticia-destaque img {
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

@media (max-width: 680px) {
	.single-noticia-destaque {
		float: none;
		margin: 15px 0;
		width: 100%;
	}
	.single-noticia-destaque img {
		width: 100%;
	}
}