Responsive css not working properly

Question

I have 3 different stylesheets, one for pc screens, one for smartphones like iPhone5S, Samsung Galaxy S4...and another for smaller smartphones, such as my Samsung Galaxy mini.

This is how I wrote my links in my html file:

  <link media="handheld, only screen and (max-width: 300px), only screen and (max-device-width: 300px)" href="StylesheeetSmallSphone.css" type="text/css" rel="stylesheet" />
  <link media="handheld, only screen and (min-width:301px) and (max-width: 480px), only screen and (min-device-width:301px) and (max-device-width: 480px)" href="StylesheetLargeSPhone.css" type="text/css" rel="stylesheet" />
  <link media="Screen" rel="stylesheet" type="text/css" href="StylesheetPC.css" />

On every device, the css applied is the last one. What do I have to change so that every device displays its own css?

Answer 1

试试吧..

<link rel="stylesheet" type="text/css" media="only screen and (max-device-width: 480px)" href="small-device.css" />

Answer 2

您是专门指最后一个还是最后一个？