.btn.btn-lg  {
    position: relative;
    font-size: 20px;
    width: 100%;
    max-width: 400px;
    padding: 1em;
    background-color: #0E2844;
}
.btn.btn-lg::after  {
    position: absolute;
    top: 40%;
    right: 10px;
    content: '';
    display: inline-block;
    width: 38px;
    height: 20px;
    background-image: url(../images/top/icon_arrow.png);
    background-size: contain; 
    background-repeat: no-repeat;
}
@media (max-width: 768px) {
.btn.btn-lg  {
    position: relative;
    font-size: 18px;
}
}


/*-------  mission  --------*/

.mission  {
    background-image: url(../images/top/img_bg_mission.png);
    background-position: right;
    background-repeat: no-repeat;
    background-size: 75%;
    margin: 100px 0;
}
.mission .bg_white {
    padding: 50px;
}
.mission .row-f {
    justify-content: space-evenly;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.mission h2 {
    text-align: center;
    margin-bottom: 50px;
}

@media (max-width: 1400px) {
.mission  {
    background-size: cover;
}
}

@media (max-width: 768px) {
.mission  {
    background-size: cover;
    margin:0;
}
.mission h2 {
    margin-bottom: 30px;
}
.mission .bg_white {
    padding: 25px 0;
}
.mission .row-f {
    flex-direction: column;
}
.mission .row-f img {
    display: block;
    width: 80%;
    max-width: 400px;
    margin: 0 auto;
}
}




/*--------  place  --------*/
.place .row-f {
    justify-content: space-between;
}
.place h3 {
    text-align: center;
}
.place img {
    display: block;
    margin: 25px auto;
}
.place .row-f div{
    width: 47%;
    padding: 50px;
    box-shadow: 0px 5px 30px 0px rgba(125, 125, 125, 0.1);
}

@media (max-width: 768px) {
.place .row-f {
    flex-direction: column;
    width:100%;
}
.place .row-f div{
    padding: 25px;
    width: 100%;
    margin-bottom: 30px;

}
}



/*--------  service --------*/

.service  {
    background-image: url(../images/top/img_bg_service.png);
    background-size: 75%;
    background-position: left;
    background-repeat: no-repeat;
    margin: 100px 0;
}
.service h2 {
    margin-bottom: 50px;
}
.service_box {
    padding: 50px;
    margin-left: auto;
}


@media (max-width: 1400px) {
.service  {
    background-size: cover;
}

}


@media (max-width: 768px) {
.service  {
    margin: 0;
}
.service h2 {
    margin-bottom: 30px;
}
.service_box {
    padding: 25px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
}
.service_box p{
    text-align: left;
}
}



/*--------  case_study --------*/

.case_study h2{
    text-align: center;
    margin-bottom: 50px;
}
.case_study h3{
    margin-top: 0.5em;
}
.case_study .row-f{
    flex-wrap: wrap;
}
.case_study .btn {
    display: block;
    margin: 50px auto;
}


@media (max-width: 768px) {
.case_study h2{
    margin-bottom: 30px;
}

.case_study .row-f {
    flex-direction: column;
    width:100%;
}
.case_study .btn {
    margin: 30px auto;
    font-size: 18px;
}

}