@media only screen and (max-width: 736px) {
.wrap .main_visual {
    width: 100%;
    aspect-ratio: 16 / 9;
}
.wrap .main_visual iframe{
	width:100%;
	height: 100%;
    margin-top: 17px;
	margin-bottom: 17px;
}
.link_btn {
    width: 250px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 125px;
    border-color: #000000;
    font-size: 13px;
    text-align: center;
    background-color: #f1f1f1;
    padding-top: 20px;
    padding-right: 15px;
    padding-bottom: 20px;
    padding-left: 15px;
}
.link_btn a {
    text-decoration: none;
    color: #000000;
}
}