html{
    height: auto;
}
header{
    width: 100%;
    height: 70px;
    position: sticky;
    top: 0;
    background-color: black;
    z-index: 300;
}
header img{
    width: 70px;
    height: 50px;
    margin-top: 10px;
    margin-left: 20px;
}
.header_navi{
    float: right;
    margin-right: 15px;
    position: relative;
    top: -5px;
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 400;
    font-size: 20px;
}
.header_navi a{
    text-decoration: none;
    color: white;
    padding: 5px 10px;
}
.navi1,.navi2,.navi3,.navi4,.navi5{
    padding: 10px 10px !important;
}
.header_navi a:visited{
    color: white;
}
.header_navi a:hover{
    color: white;
}
.header_back{
    background-color: #707070;
}
.header_navi ul > li{
    display: inline-block;
    list-style-type: none;
}
.header_navi ul > li > a{
    display: block;
    text-transform: uppercase;
}
 
/* Submenu */

.header_navi ul li ul li{
    display: block;
}

.submenu{
    padding-top: 15px;
}
.sub_menu{
    display: none;
    list-style-type: none;
    background-color: #000;
    padding-left: 0;
    border: solid 2px white;
    border-radius: 20px;
}
.sub_menu li{
    padding: 0.3em;
    border-bottom: solid 1px white;
}
.sub_menu_last{
    border-bottom: none !important;
}
.sub_menu li:hover{
    background-color: #707070;
}
.sub_menu_top:hover{
    background-color: #707070;
    border-radius: 20px 20px 0 0;
}
.sub_menu_last:hover{
    background-color: #707070;
    border-radius: 0 0 20px 20px;
}
.header_navi ul li:hover ul{
    display: block;
}
.submenu01{
    position: absolute;
    left: 6em;
    line-height: 1.5;
    top: 3.5em;
}
.submenu02{
    position: absolute;
    left: 11em;
    line-height: 1.5;
    top: 3.5em;
}
.submenu03{
    position: absolute;
    left: 16em;
    line-height: 1.5;
    top: 3.5em;
}

main{   
    min-height: calc(100vh - 210px);
}

footer{
    width: 100%;
    height: 140px;
    background-color: black;
    font-size: 10px;
}
.left_side img{
    width: 30px;
    height: 30px;
}
footer a{
    color: white;
    text-decoration: none;
}
footer a:visited{
    color: white;
}
footer a:hover{
    color: white;
}
.footer_left{
    float: left;
    width: 40%;
    height: 140px;
    text-align: center;
    line-height: 1.6;
}
.left_side{
    position: relative;
    top: 50%;
    transform: translateY(-50%);
    width: fit-content;
    min-width: 180px;
    padding-left: 5em;
}
.footer_right{
    float: right;
    width: 15%;
    height: 140px;
}
.footer_right img{
    width: 130px;
    max-width: 100%;
    height: 110px;
}
.right_side{
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

.color01{
    color: #071260;
}
.color02{
    color: white;
}

#message{
  padding-top: 70px;
  margin-top: -70px
}
#concept{
  padding-top: 70px;
  margin-top: -70px
}
#company{
  padding-top: 70px;
  margin-top: -70px
}
#news{
  padding-top: 70px;
  margin-top: -70px
}
#our_service{
  padding-top: 70px;
  margin-top: -70px
}
#division{
  padding-top: 70px;
  margin-top: -70px
}
#interview{
  padding-top: 70px;
  margin-top: -70px
}
#benefits{
  padding-top: 70px;
  margin-top: -70px
}
#entry{
  padding-top: 70px;
  margin-top: -70px
}