Can I use
?

CSS Cascade Layers

- WD

The @layer at-rule allows authors to explicitly layer their styles in the cascade, before specificity and order of appearance are considered.

Chrome

  1. 4 - 95: Not supported
  2. 96 - 98: Disabled by default
  3. 99 - 103: Supported
  4. 104: Supported
  5. 105 - 107: Supported

Edge

  1. 12 - 95: Not supported
  2. 96 - 98: Disabled by default
  3. 99 - 103: Supported
  4. 104: Supported

Safari

  1. 3.1 - 15.3: Not supported
  2. 15.4 - 15.5: Supported
  3. 15.6: Supported
  4. 16.0 - TP: Supported

Firefox

  1. 2 - 93: Not supported
  2. 94 - 96: Disabled by default
  3. 97 - 102: Supported
  4. 103: Supported
  5. 104 - 105: Supported

Opera

  1. 9 - 85: Not supported
  2. 86 - 88: Supported
  3. 89: Supported
  4. 90: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 104: Supported

Safari on iOS

  1. 3.2 - 15.3: Not supported
  2. 15.4: Supported
  3. 15.5: Supported
  4. 16.0: Supported

Samsung Internet

  1. 4 - 16.0: Not supported
  2. 17.0: Not supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 64: Not supported

UC Browser for Android

  1. 12.12: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 104: Supported

Firefox for Android

  1. 101: Supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
WebKit support bug
Firefox support bug
Collection of demos
Chromium support bug
The Future of CSS: Cascade Layers (CSS @layer)