CSS媒体查询规则未生效，指定选择器未被检测求助

Hey Steve, let’s work through why your media query rule isn’t taking effect and fix it step by step:

• Validate the actual DOM nesting structure
  Even though div#tdr-gallery-our-work exists in your source code, plugins like Isotope often dynamically rearrange gallery items in the DOM after page load. Open your browser’s DevTools, locate the target .isotope-item, and trace up its parent elements—confirm it’s still nested directly under #tdr-gallery-our-work. If the plugin moved the item outside this container, your selector will never match.

• Check selector specificity and CSS loading order
  Your media query uses an ID selector (#tdr-gallery-our-work) combined with classes, which should have higher specificity than the default .wpb_image_grid .wpb_image_grid_ul .isotope-item rule. To eliminate any edge cases:

  • Ensure your media query CSS loads after the default gallery styles. If it loads earlier, some browsers might prioritize later-loaded rules (even with lower specificity, though this is rare).
  • Boost the selector specificity further to guarantee it overrides the default rule. Modify your media query like this:

    @media (min-width: 981px) {
      body #tdr-gallery-our-work .wpb_image_grid .wpb_image_grid_ul .isotope-item {
        max-width: 9.09090909% !important;
        position: relative !important;
        left: auto !important;
        top: auto !important;
      }
    }
    

• Scan for syntax errors in surrounding CSS
  A missing closing bracket } in a rule above line 449 can cause the browser to ignore your entire media query block. Double-check the CSS immediately before your media query for unclosed rules or invalid syntax that might break parsing.

• Debug with an inline style test
  To confirm the issue is with the selector/media query (not the value itself), temporarily add an inline style to one .isotope-item:

  <li class="isotope-item" style="max-width:9.09090909% !important;"></li>
  

  If this works, the problem is definitely that your selector isn’t matching the element.

• Clear browser cache
  Outdated cached CSS can prevent new rules from applying. Force a hard refresh (Ctrl+F5 on Windows/Linux, Cmd+Shift+R on macOS) to load the latest version of your stylesheet.

内容的提问来源于stack exchange，提问作者Steve