.main-visual {
    height: 160px;
    background-size: cover;
    text-align: center;
    position: relative;
    overflow: hidden;
/*-    margin:0 -15px  15px -15px;-*/
    height: auto;
        z-index: 3;
}
 
.main-visual img {
    z-index: 2;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: auto;
}
 
.main-visual video{
    margin: 0 -15px;
    z-index: 1;
    width: 100%;
        height: auto;
}

.marso img{
width:calc(100% / 3);
}
 div.logo {

padding-right: 1rem;
 }
 div.logo > img{
 width: 100%;
 vertical-align: middle;
 }
 
 
@media (min-width: 576px) { 
.main-visual {
    height: auto;

}
 
.main-visual img {
    top: 6px;
}
 
.main-visual video{
    width: 100%;
        height: auto;

}


}

/* Medium devices (tablets, 768px and up)*/
@media (min-width: 768px) { 



}

/* Large devices (desktops, 992px and up)*/
@media (min-width: 992px) { 
 div.logo > img{
 width: 95%;
 }
div.wrap{
display: flex;
}
 div.logo{
 width:50%;
 }
 div.textt{
  width:50%;
 }


.marso img{
width:calc(100% / 4);
}
#top_header{
height: 300px;
}

}

/* Extra large devices (large desktops, 1200px and up)*/
@media (min-width: 1200px) { 

.marso img{
width:calc(100% / 5);
}

}

@media (min-width: 1600px) { 


}