body{
    min-width: 1200px;
    overflow-x: auto;
}
ul{
    /*display: inline-block;*/
}
a:hover,
a:active,
a:focus{
    text-decoration:none
}
.header{
    position: fixed;
    top: 0;
    z-index: 100;
    width: 100%;
    height: 60px;
    background-color: #fff;
}
.header-bg{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    z-index: 1;
}
.header-nav{
    position: relative;
    width: 1360px;
    height: 100%;
    margin: 0 auto;
    z-index: 2;
}
@media screen and (max-width: 1380px) {
    .header-nav{
        width: 1200px;
    }
}
.nav-logo{
    float: left;
    width: 148px;
    height: 50px;
    line-height: 78px;
    box-sizing: border-box;
    cursor: pointer;
}
.nav-menu{
    float: right;
    height: 100%;
    line-height: 60px;
}
.nav-menu>li{
    float: left;
    margin-right: 70px;
    height: 100%;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    box-sizing: border-box;
}
.nav-menu>li>a{
    color: #666;
    display: inline-block;
    height: 100%;
}
.nav-menu>li>a.active,
.nav-menu>li>a:hover{
    color: #000;
}
.nav-user{
    float: right;
    height: 100%;
    line-height: 80px;
}
.user-login>span{
    display: inline-block;
    color: #6c7373;
    font-size: 14px;
    cursor: pointer;
}
.user-login>span>a{
    display: inline-block;
    color: #000;
}
.user-login>span>a:active,
.user-login>span>a:hover{
    color: #666;
}
.user-pic{
    display: none;
    position: relative;
    height: 80px;
    cursor: pointer;
    padding: 20px;
}
.user-pic .pic{
    width: 40px;
    height: 40px;
    background-color: rgba(49,61,72,.6);
    border-radius: 50%;
    box-sizing: border-box;
}
.pic>img{
    cursor: pointer;
    border-radius: 50%;
    vertical-align: top;
}
.stem-oper,
.project-oper{
    display: none;
    position: absolute;
    z-index: 10;
    top: 60px;
    transform: translateX(-20px);
    padding-top: 10px;
    width: 170px;
    height: 90px;
    background-color: #fff;
    box-shadow: 0 4px 10px rgba(20,39,56,.1);
    -webkit-border-radius: 0 0 5px 5px;
    -moz-border-radius: 0 0 5px 5px;
    border-radius: 0 0 5px 5px;
}
.oper{
    border-bottom: 1px solid #f5f7f9;
    box-sizing: border-box;
}
.oper ul li{
    width: 100%;
    height: 35px;
    padding-left: 20px;
    line-height: 35px;
    text-align: left;
    font-weight: normal;
    font-size: 16px;
    color: #000;
    background-color: #fff;
    -webkit-border-radius: 2px;
    -moz-border-radius: 2px;
    border-radius: 2px;
    cursor: pointer;
}
.oper ul li:hover,
.oper ul li.active{
    color: #fff;
    background: #3790ff;
}
.footer{
    width: 100%;
    height: 217px;
    background-color: #252c34;
}
.footer-nav{
    width: 1200px;
    height: 100%;
    margin: 0 auto;
}
.footer-nav>ul{
    padding: 65px 188px 70px;
}
.footer-nav>ul>li{
    float: left;
    width: 20%;
    text-align: center;
}
.footer-nav>ul>li>a{
    font-size: 14px;
    color: #aab9cb;
}
.footer-nav>ul>li>a:hover{
    color: rgb(255,224,9);
}
.nav-copy-right{
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: #aab9cb;
}
.nav-copy-right>span{
    display: block;
}