.breadcrumbs {
    float: left;
    position: absolute;
    height: 40px;
    max-width: 195px;
    min-width: 25px;
    width: calc((100vw - 400px)/2 - 25px);
    margin-top: 60px;
    box-shadow: 5px 5px 10px 0px gray;
    background-color: #fff;
    border-radius: 0px 10px 0px 0px;
    font-size: 15px;
    line-height: 40px;
    color: #409eff;
    padding-left: 5px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.sider {
    float: left;
    position: absolute;
    margin-top: 100px;
    max-width: 200px;
    min-width: 30px;
    width: calc((100vw - 400px)/2 - 20px);
    max-height: 560px;
    box-shadow: 5px 5px 10px 0px gray;
    border-radius: 0px 0px 10px 0px;
    background-color: #fff;
}

.sider div {
    margin: 20px 0px;
}

.sider div a {
    display: inline-block;
    border-radius: 15px;
    max-width: 200px;
    width: calc((100vw - 400px)/2 - 20px);
    min-width: 30px;
    text-align: center;
    padding-top: 5px;
    padding-bottom: 5px;
    text-decoration: none;
    color: #409eff;
    cursor: pointer;
}

.sider div a:hover {
    color: #fff;
    background-color: #409eff;
    cursor: pointer;
}