@media screen and (max-width: 640px)  {
    #banner{height:200px;}
    #banner .container{width:100%;}    
    #service #service_title{font-size:2.5em;font-weight: 400; margin-bottom:0.5em;}
    #main li{width:100%; display:flex; flex-direction: row;justify-content: space-between;}
    #main li img{width:40%;}
    #main li .news_list{width:55%;}
}
@media screen and (min-width: 640px)  {    
    body{height:100vh;}
    #banner{height:350px;}
    #main li{width:30%;display:flex; flex-direction: column;}
    #main .news_list{margin-top:1em;}
    #service #service_title{font-size:3em;font-weight: 800; margin-bottom:0.5em;}
}
@media screen and (min-width: 960px) {}
@media screen and (min-width:1200px){
}

#banner{
    width:100%;
    background-image:url(../images/banner.jpg);
    background-size:cover;
    background-repeat: no-repeat;
    background-position: center center;
}
#banner .container{
    height:100%;
    background-color: rgba(25, 80, 126, 0.4);
}
#banner #service{
    width:100%;
    height:100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color:rgb(236, 235, 235);
}

#service a{
    font-size:2em;
    color:rgb(236, 235, 235);
}
#main{
    height:calc(100% - 434px - 8em);
}
#main_title{
    display:flex;
    flex-direction: row;
    height:3em;
    align-items: center;
    font-size:1.2em;
    font-weight:bold;
}
#main ul{
    padding:0;
    margin:0;
    width:100%;
    height:calc(100% - 3.5em);
    display:flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;

}
#main li{
    list-style-type: none;
    height:100%;
    margin-bottom: 1em;
    
}
#main img{
    width:100%;
    aspect-ratio: 16/9;

}