.m-doc-sidebar-nav-wrapper {
    width: 250px;
    position: absolute;
    left: 0;
    top: 0px;
    bottom: 0px;
    box-sizing: border-box;
    border-right: 1px solid #EEEEEE;
    padding-top: 92px;
    padding-bottom: 40px;
    overflow-y: auto;
    display: none;
}

.m-doc-sidebar-nav-wrapper ul {
    max-height: 100%;
}
.m-doc-sidebar-nav-wrapper ul div {
    height: 44px;
    color: #000;
    line-height: 44px;
    padding-left: 40px;
    position: relative;
}
.m-doc-sidebar-nav-wrapper ul div:hover,
.m-doc-sidebar-nav-wrapper ul li ul li:hover {
    cursor: pointer;
}
.m-doc-sidebar-nav-wrapper ul div span,
.m-doc-sidebar-nav-wrapper ul div img {
    display: inline-block;
    vertical-align: middle;
}
.m-doc-sidebar-nav-wrapper ul div img {
    width: 15px;
    height: 15px;
    position: absolute;
    right: 20px;
    top: 50%;
    margin-top: -7px;
    margin-bottom: -7px;
}
.m-doc-sidebar-nav-wrapper ul .m-doc-sidebar-nav-selected div img {
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
}
.m-doc-sidebar-nav-wrapper ul li ul {
    display: none;
}
.m-doc-sidebar-nav-wrapper ul .m-doc-sidebar-nav-selected ul {
    display: block;
}
.m-doc-sidebar-nav-wrapper ul li ul li {
    height: 44px;
    line-height: 44px;
}
.m-doc-sidebar-nav-wrapper ul li ul .m-doc-sidebar-selected {
    background: #eaf3ff;
}
.m-doc-sidebar-nav-wrapper ul li ul li a {
    color: #666;
    text-decoration: none;
    height: 100%;
    display: block;
    padding-left: 54px;
    transition-timing-function: ease;
    transition-duration: .2s;
    transition-property: color;
}
.m-doc-sidebar-nav-wrapper ul li ul li:hover a {
    color: #8aadff;
}
.m-doc-sidebar-nav-wrapper ul li ul li.m-doc-sidebar-selected a {
    color: #3C76FF;
}
.m-doc-sidebar-mask {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: rgba(0,0,0,0.10);
    z-index: 100000;
}

/* sidebar 移动端适配 */
@media only screen and (max-width: 768px) {
    .m-doc-sidebar-nav-wrapper {
        padding-top: 32px; 
        transform: translateX(-250px);
        -webkit-transform: translateX(-250px);
        z-index: 100001;
        background: #fff;
        position: fixed;
    }
    .m-doc-sidebar-nav-wrapper-show {
        transform: translateX(0);
        -webkit-transform: translateX(0);
    }
    .m-doc-sidebar-mask-show {
        display: block;
    }
}