Copyright information fixed at the bottom

<Div class="Copyright" ID="Copyright"> <Div class="Container"> <Div class="Row"> <Div class="Col-sm-12"> <span>copyright? &nbsp;&nbsp;&nbsp; <a href="http://weibo.com/cbd1/"target="_blank"> Weibo @CbdFocus </a></span> </Div> </Div> </Div></Div>

 <style            ;   .copyright  { position :  absolute             ; bottom :    px  ; margin-left :  40 %  ; margin-right :  60 %  ;     </style ;   

When the CSS is not decorated, the copyright information will run up automatically when the page information is insufficient.
Position to a fixed value with absolute or fixed,bottom.
It is unclear why the proportion of Margin-left to the right ~~40-60 at 50% seems just right.

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Copyright information fixed at the bottom