.tree{
    margin: 20px 0;
    color: #999999;
}
.tree>span{
    color: #333;
}
.tree>span>a{
    color: #999999;
}
.login_bg{
    width: 100%;
    min-width: 1200px;
    height: 100%;
    background: #F2F2F2;
    color: #333;
    font-size: 14px;
    overflow: hidden;
}
.user_index_left>div{
    width: 250px;
    height: 40px;
    box-sizing: border-box;
    padding-left: 20px;
    line-height: 40px;
    font-size: 18px;
    color: #fff;
    font-weight: 600;
    background: #676767;
}
.right_box{
    width: 940px;
    min-height: 450px;
    margin-bottom: 30px;
    background: #fff;
    float: left;
    padding: 0 20px;
    box-sizing: border-box;
    position: relative;
}
.user_index_left{
    background: #fff;
    margin-right: 8px;
    width: 250px;
}
.user_index_left>ul{
    margin-top: 10px;
}
.user_index_left>ul>li>a{
    display: block;
    line-height: 35px;
    color: #666666;
    box-sizing: border-box;
    padding-left: 20px;
}
.user_index_left>ul>li>a>span{
    display: block;
    width: 195px;
    float: left;
}
.user_index_left>ul>li>a>i{
    font-size: 20px;
    float: left;
    margin-right: 15px;
}