<div class="col-lg-3">
<div>left</div>
</div>
< ;div class="col-lg-9">
<div>right</div>
</div>
this or so The layout does not take effect in Google Chrome and still displays the top and bottom layout. Even if I download the courseware source code, it does not take effect, but QQ browser...
qq browser uses Google’s kernel, check whether your Google browser has cache enabled, or clear your browser cache directly