#containers{
    margin: 0 auto;
    width:800px; 
    height:400px
}
@media (min-width: 768px) and (max-width: 991px) {
    #containers{
        margin: 0 auto;
        width:600px; 
        height:300px
    }
  
  } 
   @media only screen and (min-width: 650px) and (max-width: 767px) {
        #containers{
            margin: 0 auto;
            width:600px; 
            height:300px
        }
		.member-img a img{
			width: 100%;
			height: 100%;
		}
    }
    @media only screen and (min-width: 480px) and (max-width: 650px) {
        #containers{
            margin: 0 auto;
            width:500px; 
            height:400px
        }
		.member-img a img{
			width: 100%;
			height: 100%;
		}
    }