body{
    background-color: #fbfbfb;
}
.container{
    display: flex;
    flex-direction: column;
}
.header{
    font-size: 18px;
    width: 100%;
    top: 30px;
    background-color: #fff;
}
.header ul{
    list-style:none;
    margin-right:50px;
    float: right;
}
.header li {
    display:inline;
    line-height:40px;
    float:left;
    margin-left: 40px;
}
.header a {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}
.main {
    display: flex;
    flex-direction: row;
    justify-content: center;
    margin-top: 20px;
}

.main .sidebar {
    width: 240px;
    height: 200px;
    background-color: #fff;
    margin-right: 10px;
    display: flex;
    flex-direction: column;
    padding: 20px;
    line-height: 30px;
}
.main .sidebar a {
    text-decoration: none;
    color: #000;
}

.main .content {
    width: 690px;
    padding: 20px;
    background-color: #fff;
}
.footer {
    text-align: center;
    padding-bottom: 10px;
    font: 12px "宋体", "Arial Narrow", HELVETICA;
}

.footer a {
    color: #BBBBBB;
    text-decoration: none;
}

.footer-top {
    display: flex;
    font-size: 12px;
    justify-content: center;
    margin-top: 80px;
    margin-bottom: 10px;
}

.footer-top div {
    width: 100px;
}