.head{
    width: 100%;
    height: 120px;
    margin: 0 auto;
    overflow: hidden;
    line-height: 120px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #fff;
    z-index: 999;
    transition: all .3s linear;
}
.head.active{
    height: 130px;
    box-shadow:  0 0 10px #333;
}

.head>.content{
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

.head>.content>.head_left{
    float: left;
    font-size: 48px;
    color: rgb(0, 159, 233);
    position: absolute;
}
.head>.content>.head_left a{
    text-decoration: none;
    color: rgb(0, 159, 233);

}
.head>.content>.head_left .logo{
    height: 70px;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    margin: auto;
}
.head>.content>.head_left span{
    margin-left: 110px;
}
.head>.content>.head_right{
    float: right;
}

.head>.content>.head_right>.list{
    height: 60px;
    overflow: hidden;
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    margin: auto;
}

.head>.content>.head_right>.list>.tab{
    width: 100px;
    height: 60px;
    line-height: 60px;
    float: left;
    font-size: 16px;
    color: #333;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    border-top: 3px solid transparent;
    margin-right: 10px;

}

.head>.content>.head_right>.list>.tab.active{
    border-top: 3px solid rgb(0, 159, 233);

}

.head>.content>.head_right>.list>a:hover{
    border-top: 3px solid rgb(0, 159, 233);
}