#thumbnails { display: block; margin-bottom: 10px; }
#thumbnails ul li { float: left; margin-right:0px; margin-bottom: 12px; }

#thumbnails ul li img {width: 270px;height: 170px;}

/** clearfix **/
.clearfix:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; }
.clearfix { display: inline-block; }