body { 
     background-color: #efefef;
     background-image:url(https://images.cnblogs.com/cnblogs_com/shwee/1218109/o_bg_shw.jpg); 
     background-repeat: no-repeat; 
     background-attachment: fixed; 
     background-position: center 0; 
     background-size: cover; 
    padding-top:0px;
  }
  /* 定制公告栏时钟位置 */
#clockdiv {
    /* left, center, right */
    text-align: center;
}
/* 定制返回顶部按键 */
#toTop {
    background: url(//https://images.cnblogs.com/cnblogs_com/shwee/1218109/o_toTop.bmp) no-repeat 0px top;
    width: 57px;
    height: 57px;
    overflow: hidden;
    position: fixed;
    right: 180px;
    bottom: 20px;
    cursor: pointer;
    /*! Color themes for Google Code Prettify | MIT License | github.com/jmblog/color-themes-for-google-code-prettify */
.pln{color:#4d4d4c}ol.linenums{margin-top:0;margin-bottom:0;color:#8e908c}li.L0,li.L1,li.L2,li.L3,li.L4,li.L5,li.L6,li.L7,li.L8,li.L9{padding-left:1em;background-color:#fff;list-style-type:decimal!important;}@media screen{.str{color:#718c00}.kwd{color:#8959a8}.com{color:#8e908c}.typ{color:#4271ae}.lit{color:#f5871f}.pun{color:#4d4d4c}.opn{color:#4d4d4c}.clo{color:#4d4d4c}.tag{color:#c82829}.atn{color:#f5871f}.atv{color:#3e999f}.dec{color:#f5871f}.var{color:#c82829}.fun{color:#4271ae}}

/*下面是我设置背景色，字体大小和字体*/
.cnblogs-markdown code{
background:#fff!important;
}
.cnblogs_code,.cnblogs_code span,.cnblogs-markdown .hljs{
    font-size:16px!important;
}

.syntaxhighlighter a, .syntaxhighlighter div, .syntaxhighlighter code, .syntaxhighlighter table, .syntaxhighlighter table td, .syntaxhighlighter table tr, .syntaxhighlighter table tbody, .syntaxhighlighter table thead, .syntaxhighlighter table caption, .syntaxhighlighter textarea {
    font-size: 16px!important;
}

.cnblogs_code, .cnblogs_code span, .cnblogs-markdown .hljs{
font-family:consolas, "Source Code Pro", monaco, monospace !important;
}
html {
    cursor: url('https://files.cnblogs.com/files/blogs/780671/bb.ico?t=1673420673'), auto;
}
<!-- 博客页面脚添加Github链接或其他链接 -->
<!-- 页面左上角 -->
<a href="https://shw2018.github.io/" title="https://github.com/fiveBE/" target="_Blank" class="github-corner" aria-label="View source on Github"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#64CEAA; color:#fff; position: absolute; top: 0; border: 0; left: 0; transform: scale(-1, 1);" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
<!-- 页面右上角 -->
<a href="https://github.com/shw2018" title="https://github.com/fiveBE/" target="_Blank" class="github-corner" aria-label="View source on Github"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#FD6C6C; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>

#header{display:none;} /* 将默认的导航头屏蔽掉，这样才能把自己的导航栏加上去 */

/* 定制自己导航栏的样式 */
#shwtop ul {
    margin: 0;
    padding: 0;
    list-style-type: none; /*去除li前的标注*/
    background-color: #333;
    overflow: hidden; /*隐藏溢出的部分，保持一行*/
}
#shwtop li {
    float: left; /*左浮动*/
}
#shwtop li a, .dropbtn {
    display: inline-block; /*设置成块*/
    color: white;
    text-align: center;
    text-decoration: none;
    padding: 14px 16px;
}
/*鼠标移上去，改变背景颜色*/
#shwtop li a:hover, .dropdown:hover .dropbtn { 
    /* 当然颜色你可以自己改成自己喜欢的，我还是挺喜欢蓝色的 */
    background-color: blue;
}
#shwtop .dropdown {
    /*
    display:inline-block将对象呈递为内联对象，
    但是对象的内容作为块对象呈递。
    旁边的内联对象会被呈递在同一行内，允许空格。
    */
    display: inline-block;
}
#shwtop .dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}
#shwtop .dropdown-content a {
    display: block;
    color: black;
    padding: 8px 10px;
    text-decoration:none;
}
#shwtop .dropdown-content a:hover {
    background-color: #a1a1a1;
}
#shwtop .dropdown:hover .dropdown-content{
    display: block;
}