responsive design - How to specify Bootstrap grid -


i have customized bootstrap setup use 960 grid instead of default width. have html using bootstrap grid:

<div class="container">           <div class="row">             <div class="col-md-3"></div>             <div class="col-md-6"></div>             <div class="col-md-3"></div>           </div> </div>

however on specific page need exact in width, instance need first row 280 pixels, second 500 pixels , third 160 pixels. how can using bootstrap grid still responsive mobile devices?


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