#home {
opacity: 0.80;
margin: 0 auto;
width: 85%;
min-width: 950px;
background-color: #fff;
padding: 30px;
margin-top: 30px;
margin-bottom: 50px;
box-shadow: 0 2px 26px rgba(100, 100, 100, 0.3);
}
body {
color: #000;
background: url(https://www.cnblogs.com/images/cnblogs_com/fashpoint/1516173/o_QQ%e5%9b%be%e7%89%8720190731133337.jpg
) fixed;
background-size: 100%;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
font-size: 18px;
min-height: 101%;
}
<script type="text/javascript">

/********************
去除广告
********************/
.ad_text_commentbox, .c_ad_block {
    display: none;
    margin: 0;
    padding: 0;
}

#ad_under_google {
    overflow: hidden;
    height: 0;
}

#myposts .PostList {
    border-left-color: #66B2FF;
    border-left-width: 20px;
    margin-bottom: 20px;
    padding: 30px 20px;
    box-shadow: 0 0 0 0, 0 6px 19px rgba(34, 34, 34, 0.1);
    -webkit-border-radius: 18px;
    -moz-border-radius: 18px;
    border-radius: 18px;
    background-color: #fff;
    font-size: 18px;
    overflow: hidden;
}

.PostList span {
    color: #808080;
}

#myposts .postText2 {
    overflow: hidden;
}

#myposts .postText2 img {
    max-width: 100%;
}

#ad_under_google, #ad_under_google a, #blog-comments-placeholder .feedback_area_title, #blog-sidecolumn #sidebar_postarchive, #c_ad_block, #catListTitle, #div-gpt-ad-1320933818841-0, #div-gpt-ad-1320933818841-1, #google_ad_c1, #google_ad_c2, #header .blogStats, #sideBarMain #widget_my_google, #site_nav_under, #tip-arrow-bottom, #tip-arrow-top, #trans-tooltip, .commentbox_title_left, [hidden], audio:not([controls]), template {
    display: none;
}

#navList a.aHeaderXML img, audio, canvas, iframe, img, svg, video {
    vertical-align: middle;
}

#main #mainContent .day .postDesc a, .entrylistItemPostDesc, .entrylistItemPostDesc a {
    color: #bfbfbf;
}

#main #mainContent .postTitle a:hover, .entrylistPosttitle:hover a {
    color: #66B2FF;
}

.bq_post_comment img {
    max-width: 100%;
}

#ad_t2, #ad_under_post_holder, #blog_news_kb, #comment_nav, #google_ad_c2, #site_nav_under, #under_post_kb, #under_post_news, blog_news_kb, google_ad_c2 {
    display: none!important;
}

.buryit {
    display: none;
}

blockquote {
    border: 0px;
    border-left: 20px solid #e8ecee;
    border-radius: 3px;
    background-color: #f1f4f6;
    color: #666666;
}

.back-top.attached>a {
    box-shadow: 0 0 5px 0 rgba(0, 0, 0, .3);
    opacity: 1;
}

.back-top>a {
    position: fixed;
    right: 2%;
    bottom: 30px;
    z-index: 1030;
    display: block;
    width: 60px;
    height: 60px;
    border-radius: 100%;
    background-color: rgba(0, 0, 0, .2);
    text-align: center;
    opacity: 0;
    transition: all .5s;
}

.tpwthwidt .copyright_3C74fJC {
    display: none!important;
}

.cnblogs_code body {   
font-family: Courier New!important;
font-size: 18px!important;         //改这里就好，我也是想改，今天照着js改就好了
line-height: 1.5!important;
}
//博客园标题
#cnblogs_post_body
{
    color: black;      
    font: 0.875em/1.5em "微软雅黑" , "PTSans" , "Arial" ,sans-serif;
    font-size: 15px;
}
#cnblogs_post_body h1    {
    background: #333366;
    border-radius: 6px 6px 6px 6px;
    box-shadow: 0 0 0 1px #5F5A4B, 1px 1px 6px 1px rgba(10, 10, 0, 0.5);
    color: #FFFFFF;
    font-family: "微软雅黑" , "宋体" , "黑体" ,Arial;
    font-size: 36px;
    font-weight: bold;
    height: 25px;
    line-height: 25px;
    margin: 18px 0 !important;
    padding: 8px 0 5px 5px;
    text-shadow: 2px 2px 3px #222222;
}
#cnblogs_post_body h2    {
    background:  #ff9900 ;
    border-radius: 6px 6px 6px 6px;
    box-shadow: 0 0 0 1px #5F5A4B, 1px 1px 6px 1px rgba(10, 10, 0, 0.5);
    color: #FFFFFF;
    font-family: "微软雅黑" , "宋体" , "黑体" ,Arial;
    font-size: 30px;
    font-weight: bold;
    height: 25px;
    line-height: 25px;
    margin: 18px 0 !important;
    padding: 8px 0 5px 5px;
    text-shadow: 2px 2px 3px #222222;
}
#cnblogs_post_body h3    {
    background: #FFB6C1;
    border-radius: 6px 6px 6px 6px;
    box-shadow: 0 0 0 1px #4169E1, 1px 1px 6px 1px rgba(10, 10, 0, 0.5);
    color: #4B0082;
    font-family: "微软雅黑" , "宋体" , "黑体" ,Arial;
    font-size: 27px;
    font-weight: bold;
    height: 25px;
    line-height: 25px;
    margin: 18px 0 !important;
    padding: 8px 0 5px 5px;
    text-shadow: 2px 2px 3px #222222;
}
#cnblogs_post_body h4{
    background: #2B6600;
    border-radius: 6px 6px 6px 6px;
    box-shadow: 0 0 0 1px #5F5A4B, 1px 1px 6px 1px rgba(10, 10, 0, 0.5);
    color: #FFFFFF;
    font-family: "微软雅黑" , "宋体" , "黑体" ,Arial;
    font-size: 24px;
    font-weight: bold;
    height: 24px;
    line-height: 23px;
    margin: 12px 0 !important;
    padding: 5px 0 5px 10px;
    text-shadow: 2px 2px 3px #222222;
}
.cnblogs_code pre {
font-family: Courier New!important;
font-size: 18px!important;
word-wrap: break-word;
white-space: pre-wrap;
}
.cnblogs_code span {
font-family: Courier New!important;
font-size: 18px!important;
line-height: 1.5!important;
}