/* 判断ipad */@media only screenand (min-device-width : 768px)and (max-device-width : 1024px){/* style */}
/* ipad横屏 */@media only screenand (min-device-width : 768px)and (max-device-width : 1024px)and (orientation : landscape){/* style */}
/* ipad竖屏 */@media only screenand (min-device-width : 768px)and (max-device-width : 1024px)and (orientation : portrait){/* style */}
/* 判断iphone5 *//* 横屏竖屏判断方法与ipad一样 */@media only screenand (min-device-width : 320px)and (max-device-width : 568px){/* style */}
/* 判断iphone4-iphone4s *//* 横屏竖屏判断方法与ipad一样 */@media only screenand (min-device-width : 320px)and (max-device-width : 480px){/* style */}
/* iphone5分辨率 */screen Width = 320px (css像素)screen Height = 568px (css像素)screen Width = 640px (实际像素)screen Height = 1136px (实际像素)Device-pixel-ratio:2
/* iphone4-iphone4s分辨率 */screen Width = 320px (css像素)screen Height = 480px (css像素)screen Width = 640px (实际像素)screen Height = 960px (实际像素)Device-pixel-ratio:2