.git-link {
    z-index: 9999;
    position: fixed;
    top: 0;
   /* right: 0;*/
    border: 0;
    height: 120px;
    width: 120px;
/*
    transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
    -o-transform: rotate(90deg);
    -ms-transform: rotate(90deg);*/
    background-image: url(//images2015.cnblogs.com/blog/459873/201603/459873-20160317090540131-1089895320.png);
    background-size: contain;
    opacity: 0.7;
}