.logo_nav{
    width: 60px;
    height: 60px;
    border-radius: 4px;
    border: 1px solid #fff;
}

.logo_name {
    width: 10rem;
    color: #fff;
    margin-left: 10px;
    font-size: 2rem;    
}

/**
    顶部
*/
.head{
    position: fixed;    
    left:0;
    top:0;
    background-color: #0A6AFA;
    width:100%;
    height:80px; 
    border-bottom: solid 1px #fff;
    display: flex;
    justify-content: space-between; 
    align-items:center;
    z-index:100;
}

.head-left {
    display: flex; 
    align-items:center;
    margin-left: 200px;
}

.head-right {
    text-align: center;
}

.head-right_login {
    text-align: center;
    color:#fff;
    font-size: 20px;
    font-weight: 700;
    background-color: #2e95ff;
    border-radius: 4px;
    height: 40px;
    width: 144px;
    line-height: 40px;
    margin-right: 200px;
    padding: 10px 20px;
}

.nav {
    height: 57px;
    display: inline-block;
    vertical-align: middle;
    margin: 0 30px;
}
.nav li{
    display: block;
    float: left;
    position: relative;
}
.nav li a {
    position: relative;
    display: block;
    height: 57px;
    line-height: 57px;
    padding: 0 15px;
    color: #FFFFFF;
    /*border: solid #fff;*/
    border-width: 0 1px 0 1px;
    font-size: 1.5rem;
    font-weight: 400;
}

.nav li a.active{
    color:#5aaae0;
}
.nav li a:hover {
    border-radius: 6px;
    background-color: rgba(255,255,255,0.2);
}
.nav-bar li a:hover {
    background-color: #F7F7F7;
}

.single-content {
    width: 1200px;
    margin:auto;
}

.single-banner {
    width:1200px;
    height:557px;
    background-size: 100% auto;
    margin: auto;
    display: flex;
    align-items:center;
}