.header-container{
    width: 100%;
    height: 70px;
    position: fixed;
    top: 0;
    z-index: 999;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: all .3s;
    background-color: #fff;
}
.header-position-container{
    width: 1200px;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    padding: 0 70px;
}
.menu{
    display: flex;
    justify-content: center;
    align-items: center;
}
.menu ul{
    display: flex;
    align-items: center;
}
.menu a{
    display: flex;
    justify-content: center;
    padding: 0 15px;
    font-weight: bold;
    color: #333;
    position: relative;
    transition: all .3s;
    line-height: 80px;
}
.header-container .menu a:hover:before{
    opacity: 1;
    transition: all .3s;
}
.header-container .menu a:before{
    display: block;
    content: '';
    position: absolute;
    height: 4px;
    width: 25px;
    border-radius: 4px;
    background-color: #024c9f;
    bottom: 16px;
    opacity: 0;
    transition: all .3s;
}
.header-container .menu a:hover:before{
    opacity: 1;
    transition: all .3s;
}
.header-container .logo{
    display: block;
    width: 270px;
    height: 52px;
    background:url("../img/logo-default.png") no-repeat center top;
    transition: all .3s;
}
.header-container .hot-tel{
    width: 151px;
    height: 35px;
    background: url("../img/hot-tel-default.png") no-repeat center center;
    background-size: contain;
    transition: all .3s;

}