メディア クエリ範囲を使用してデスクトップとモバイルの CSS スタイルを完全に分離するにはどうすればよいですか?

@media only screen and (max-device-width: 600px) { /* mobile only styles when the device is 0-600px in maximum width */ }

@media only screen and (max-device-width: 1000px) { /* mobile only styles when the device is up to 1000px in maximum width */ }

/* main desktop styles */

@media all and (min-width: 1024px) {
  /* your desktop styles */
}

@media all and (min-width: 960px) and (max-width: 1024px) {
  /* styles for screen size between 960px and 1024px */
}

@media all and (min-width: 801px) and (max-width: 959px) {
  /* styles for screen size between 801px and 959px */
}

/* repeat for other desired screen sizes */

@media all and (min-width: 321px) and (max-width: 480px) {
  /* styles for screen size between 321px and 480px */
}

@media all and (min-width: 0px) and (max-width: 320px) {
  /* styles for screen size between 0px and 320px */
}