#header{
    width: 100%;
    height: 100px;
    background-color: #fff;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99999;
    transition: box-shadow .5s;
}

#header.scroll_down{
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header_center{
    width: 90%;
    height: 100%;
    min-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

ul.main_menu{
    display: flex;
    height: 100%;
}

ul.main_menu>li{
    height: 100%;
    margin-right: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

ul.main_menu>li a{
    height: 100%;
    font-family: 'GmarketSansMedium', sans-serif;
    font-size: 16px;
    color: #111;
    text-transform: uppercase;
}

ul.main_menu>li:last-child{
    margin-right: 0;
}

ul.sub_menu{
    width: 240px;
    padding: 35px 10px 30px;
    box-sizing: border-box;
    background-color: #fff;
    box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.3);
    position: absolute;
    top: 100px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s, visibility .3s;
}

ul.main_menu>li:hover ul.sub_menu{
    opacity: 1;
    visibility: visible;
}

ul.sub_menu>span{
    position: absolute;
    width: 2px;
    height: 30px;
    background-color: #cda531;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
}

ul.sub_menu li{
    width: 100%;
    text-align: center;
    font-size: 14px;
    font-family: 'GmarketSansMedium', sans-serif;
    cursor: pointer;
    margin-bottom: 15px;
}

ul.sub_menu li:last-child{
    margin-bottom: 0;
}