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#dynamic_logo img{
/*先隱藏原本的影像*/
filter: alpha(opacity=0);opacity:0.0;}
#dynamic_logo{
._lc_ #dynamic_logo { background-repeat: no-repeat; height: 400px; width: 500px; background-image: url(https://images.plurk.com/5biYLi0q7KbKjOpf0XBipw.png);}