标准设备的-media queries

/* Smartphones (portrait and landscape) ----------- */

@media only screen 

and (min-device-width : 320px) 

and (max-device-width : 480px) {

/* Styles */

}



/* Smartphones (landscape) ----------- */

@media only screen 

and (min-width : 321px) {

/* Styles */

}



/* Smartphones (portrait) ----------- */

@media only screen 

and (max-width : 320px) {

/* Styles */

}



/* iPads (portrait and landscape) ----------- */

@media only screen 

and (min-device-width : 768px) 

and (max-device-width : 1024px) {

/* Styles */

}



/* iPads (landscape) ----------- */

@media only screen 

and (min-device-width : 768px) 

and (max-device-width : 1024px) 

and (orientation : landscape) {

/* Styles */

}



/* iPads (portrait) ----------- */

@media only screen 

and (min-device-width : 768px) 

and (max-device-width : 1024px) 

and (orientation : portrait) {

/* Styles */

}



/* Desktops and laptops ----------- */

@media only screen 

and (min-width : 1224px) {

/* Styles */

}



/* Large screens ----------- */

@media only screen 

and (min-width : 1824px) {

/* Styles */

}



/* iPhone 4 ----------- */

@media

only screen and (-webkit-min-device-pixel-ratio : 1.5),

only screen and (min-device-pixel-ratio : 1.5) {

/* Styles */

}