@media only screen   
and (min-device-width : 320px) and (max-device-width : 480px) {  
    
}  
  
  
@media only screen and (min-width : 321px) {  
    
}  
  
  
@media only screen and (max-width : 320px) {  
    
}  
  
  
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {  
    
}  
  
  
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) {  
    
}  
  
  
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) {  
    
}  
  
  
@media only screen and (min-width : 1224px) {  
    
}  
  
  
@media only screen and (min-width : 1824px) {  
    
}  
  
  
@media only screen and (-webkit-min-device-pixel-ratio:1.5), only screen and (min-device-pixel-ratio:1.5) {  
    
}