#header{
    width: 100%;
    height: 85px;
    border-bottom: 1px solid #fff;
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99;
    transition: background-color .5s;
}

#header.scroll{
    background-color: rgba(0, 0, 0, 0.7);
}

.header_center{
    width: 90%;
    min-width: 1300px;
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header_center>a{
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu_icon{
    width: 30px;
    height: 20px;
    position: relative;
    cursor: pointer;
}

.menu_icon span{
    height: 2px;
    background-color: #fff;
    position: absolute;
    right: 0;
    transition: width .3s, background-color .3s;
}

.menu_icon span:first-child{
    width: 30px;
    top: 0;
}

.menu_icon span:nth-child(2){
    width: 15px;
    top: 50%;
    transform: translateY(-50%);
}

.menu_icon span:last-child{
    width: 20px;
    bottom: 0;
}

.menu_icon:hover span{
    width: 100%;
}

































/* mobile */
@media screen and (max-width: 767px){

    #header{
        height: 60px;
    }

    .header_center{
        width: 90%;
        min-width: auto;
    }
    
    .header_center>a{
        width: 150px;
    }

    .header_center>a img{
        width: 100%;
    }
    
    .menu_icon{
        width: 20px;
        height: 15px;
        cursor: inherit;
    }
    
    .menu_icon span{
        transition: none;
    }
    
    .menu_icon span:first-child,
    .menu_icon:hover span:first-child{
        width: 20px;
    }
    
    .menu_icon span:nth-child(2),
    .menu_icon:hover span:nth-child(2){
        width: 10px;
    }
    
    .menu_icon span:last-child,
    .menu_icon:hover span:last-child{
        width: 15px;
    }
    
}























/* tablet */
@media screen and (min-width: 768px) and (max-width: 1024px){

    #header{
        height: 60px;
    }

    .header_center{
        width: 90%;
        min-width: auto;
    }
    
    .header_center>a{
        width: 150px;
    }

    .header_center>a img{
        width: 100%;
    }
    
    .menu_icon{
        width: 20px;
        height: 15px;
        cursor: inherit;
    }
    
    .menu_icon span{
        transition: none;
    }
    
    .menu_icon span:first-child,
    .menu_icon:hover span:first-child{
        width: 20px;
    }
    
    .menu_icon span:nth-child(2),
    .menu_icon:hover span:nth-child(2){
        width: 10px;
    }
    
    .menu_icon span:last-child,
    .menu_icon:hover span:last-child{
        width: 15px;
    }

}





















/* pc */
@media screen and (min-width: 1025px) and (max-width: 1400px){

    .header_center{
        min-width: auto;
    }
    
}