先上效果（代码来源于好软猫）：

第一步：找个合适的地方插入CSS代码

/*网站底部按钮美化]*/
:root{--theme-color:#f04494;--focus-shadow-color:rgba(240,68,148,.4);--mian-max-width:1200px;}.github-badge {
    display: inline-block;
    border-radius: 4px;
    text-shadow: none;
    font-size: 12px;
    color: #fff;
    line-height: 15px;
    margin-bottom: 5px;
}
.badge-subject {
    display: inline-block;
    background-color: #4d4d4d;
    padding: 4px 4px 4px 6px;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}
.github-badge .bg-blue {
    background-color: #007ec6;
}
.github-badge .bg-brightgreen {
    background-color: #4dc820;
}
.github-badge .bg-blueviolet {
    background-color: #8833d7;
}
.github-badge .badge-value {
    display: inline-block;
    padding: 4px 6px 4px 4px;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}
.github-badge .bg-orange {
    background-color: orange;
}

第二步：插入HTML代码（网站后台–外观–自定义–底部小工具–插入）

<!--网站底部按钮美化HTML-->
<div class="github-badge"><span class="badge-subject bg-blue">
<a style="color: #fff;" href="https://www.linux66.cn/" target="_blank" rel="noopener">友链申请</a>
</span>
<span class="badge-subject bg-brightgreen">
<a style="color: #fff;" href="https://www.linux66.cn/" target="_blank" rel="noopener">网站地图</a>
</span>
<span class="badge-subject bg-green">
<a style="color: #fff;" href="https://www.linux66.cn/" target="_blank" rel="noopener">本站主题</a>
</span>
<span class="badge-subject bg-orange">
<a style="color: #fff;" href="https://www.linux66.cn/" target="_blank" rel="noopener">广告合作</a>
</span>
<span class="badge-value bg-blueviolet">
<a style="color: #fff;" href="https://www.linux66.cn/" target="_blank" rel="noopener">免责申明</a>
</span>
</div>