#back-to-top {
    background-color: #00CD00;
    bottom: 0;
    box-shadow: 0 0 6px #00CD00;
    color: #444444;
    padding: 10px 10px;
    position: fixed;
    right: 50px;
    cursor: pointer;
}
.cnblogs_code pre {
font-family: Courier New!important;
font-size: 16px!important;
word-wrap: break-word;
white-space: pre-wrap;
}

.cnblogs_code span {
font-family: Courier New!important;
font-size: 16px!important;
line-height: 1.5!important;
}