HTML中META标签的“视口”…如果iPad = X，而iPhone = Y？

<meta name=\"viewport\" content=\"width=1040px, minimum-scale=0.5, maximum-scale=1.0\" />

<meta name=\"viewport\" content=\"width=440px, minimum-scale=0.5, maximum-scale=1.0\" />

<meta name = \"viewport\" content = \"user-scalable=no, width=device-width\"/>

<meta name=\"apple-mobile-web-app-capable\" content=\"yes\"/>

<link media=\"only screen and (device-width: 768px)\" rel=\"stylesheet\" href=\"css/ipad.css\" type=\"text/css\" title=\"no title\"/>

<link media=\"only screen and (max-device-width: 480px)\" rel=\"stylesheet\" href=\"css/small-device.css\" type=\"text/css\" title=\"no title\"/>