.cnblogs_code pre {
font-family: Courier New!important;
font-size: 14px!important;
word-wrap: break-word;
white-space: pre-wrap;
}
<!--代码字体大小 -->
.cnblogs_code span {
font-family: Courier New!important;
font-size: 14px!important;
line-height: 1.5!important;
}
<!--代码字体大小 -->

<!--侧边容器 -->
/*sideBar博客侧边栏容器*/
#sideBar {
    width: 300px;
    box-sizing: border-box;
    margin-left: 30px;
    padding: 0;
}

.newsItem, .catListComment, .catListEssay, .catListView, .catListFeedback,
#blog-calendar, #sidebar_postcategory, #sidebar_postcategory, #sidebar_postarchive, #sidebar_search {
    /*侧边栏每一模块添加圆角和阴影*/
    border-radius: 10px;
    box-shadow: 1px 2px 3px #A7A8AD;
    background-color: #fff;
}

#sideBarMain h3, .newsItem h3 {
    /*侧边栏每个模块的标题部分*/
    font-size: 1.2em;
    height: 50px;
    line-height: 50px;
    text-indent: 0.5em;
    background: url(https://www.cnblogs.com/skins/red_autumnal_leaves/images/titlebg.png) no-repeat left center #fff;
    padding: 0 0 0 50px;
    margin-bottom: 0;
    border: 1px solid #55895B;
    border-left-width: 5px;
    border-radius: 10px;
    border-right-width: 5px;
}

/*侧边栏列表样式*/
#sideBarMain ul {
    background-color: #fff;
    padding: 15px 20px;
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
}

#sideBarMain li {
    line-height: 40px;
    border-bottom: 1px solid #ddd;
    font-size: 14px;
}