.half{width:50%}.fleft{float:left}.clear{clear:both}.content-button{background-color:#f44336;border:none;color:#fff;padding:15px 32px;text-align:center;text-decoration:none;display:inline-block;font-size:16px}.bg_white{background-color:#fff}.bg_gray{background-color:gray}.bg_blue{background-color:#00f}