MediaWiki:MenuSidebar.css

.skin-vector .mw-body {
    margin-left: 11em !important;
    padding: 1.25em 1.5em 1.5em 1.5em !important
}

.skin-vector #mw-panel {
    padding-left: 0 !important;
    width: 10.5em !important
}

.skin-vector #left-navigation,
.skin-vector #content {
    margin-left: 11em
}

div#MenuSidebar {
    margin-bottom: 5rem;
    position: absolute;
    top: 200px;
    text-align: center !important;
    width: 100%
}

div#MenuSidebar a.external {
    background: none;
    padding-right: 18px;
    padding-left: 18px;
}

div#MenuSidebar>:first-child {
    margin-top: 0px;
    border-top: 2px solid #000000
}

div#MenuSidebar>:first-child>:first-child {
    box-shadow: none
}

div#MenuSidebar>ul {
    list-style: none none;
    width: 100%;
    margin: 0px;
    background-color: rgba(20, 20, 20, 0.6);
    border-top: 2px solid #000000;
    border-bottom-right-radius: 5px
}

div#MenuSidebar ul {
    position: relative;
    font-size: 0.9rem
}

div#MenuSidebar>ul>li ul {
    display: block;
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: 0.2s all ease-in-out;
    z-index: 1;
    background-color: #000000;
    width: unset !important;
    white-space: nowrap
}

div#MenuSidebar>ul>li ul a,
div#MenuSidebar>ul>li ul b {
    padding-right: 18px;
}

div#MenuSidebar>ul ul {
    list-style: none none;
    position: absolute;
    left: 100%;
    width: 100%;
    top: 0px;
    margin: 0px;
    z-index: 1;
    background-color: #333;
}

div#MenuSidebar ul li:first-child {
    box-shadow: none
}

div#MenuSidebar>p {
    background: url(https://heishenhua.wiki/w/images/news-more-btn.png) no-repeat center center;
    background-size: 100% 100%;
    padding: 8px 10px;
    margin: 0px;
    cursor: default;
    color: #a83d32;
    font-weight: bold;
    font-size: 120%;
    font-family: STKaiti,Kaiti SC,Kaiti,BlinkMacSystemFont,Helvetica Neue,PingFang SC,Microsoft YaHei,Source Han Sans SC,Noto Sans CJK SC,WenQuanYi Micro Hei,Arial,sans-serif;
    margin-top: 8px;
    text-align: center;
    background-color: rgba(30, 30, 30, 0.6)
}

div#MenuSidebar>ul li:hover>ul {
    display: block;
    opacity: 1;
    pointer-events: auto;
    visibility: visible
}

div#MenuSidebar li {
    position: relative;
    margin: 0px;
    box-shadow: inset 0 1px rgba(0, 0, 0, 1);
    transition: 0.15s all ease-in;
    z-index: 1;
    background: url(https://heishenhua.wiki/w/images/sidebar_li.png) no-repeat center center;
    background-size: 100% 100%;
}

div#MenuSidebar li b,
div#MenuSidebar li a {
	padding: 5px 0px;
    padding-left: 0px;
    display: block;
    width: auto;
    height: 100%;
    font-weight: normal
}

div#MenuSidebar a {
    transition: all 0.15s ease-in;
    color: #dfdad3
}

div#MenuSidebar a:hover,
div#MenuSidebar b:hover {
    color: black;
    text-decoration: none !important;
    background: url('https://heishenhua.wiki/w/images/sidebar_li_h.png') no-repeat center center;
    background-size: 100% 100%;
}

div#MenuSidebar b {
    cursor: default
}

div#MenuSidebar li.child>a::after,div#MenuSidebar li.child>b::after{
    float:right;
    content: " ";
    border-top: 0.35em solid transparent;
    border-left: 0.45em solid #EAEAEA;
    border-bottom: 0.35em solid transparent;
    transform: translate(-0.2em, 0.2em);
}

div#MenuSidebar a.selflink {
    font-weight: bold;
    color: #f4c430;
    cursor: default
}

div#MenuSidebar a.selflink:hover {
    background-color: inherit;
    color: #f4c430
}

div#MenuSidebar>ul>li:last-child>a,
div#MenuSidebar>ul>li:last-child>b {
    border-bottom-right-radius: 5px
}

div#MenuSidebar a.selflink::before {
    content: "";
    display: block;
    position: absolute;
    left: 0px;
    top: 50%;
    transform: translateY(-50%);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 6px solid #f4c430
}

/* #MenuSidebar .copyUrl::after {
    content: "\f0c1";
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    -webkit-font-smoothing: antialiased;
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;
    font-size: 70%;
    margin-left: .4em;
    color: var(--production);
    pointer-events: auto;
    cursor: pointer
} */

div#MenuSidebar span {
    text-align: center !important;
}