.btn-back {
    display: flex;
    justify-content: center;
    margin: 50px;
}
.btn-back a {
    background: #e51c36;
    font-size: 1.2rem;
    color: #fff;
    width: 25vw;
    text-align: center;
    padding: 10px 0;
    border-radius: 4px;
}
.title-tuning {
    width: 95%;
	text-align: center;
	margin: 50px 0;
}
.title-tuning h1 {
    line-height: 1.5;
	font-size: 2rem;
	font-weight: 900;
}
.title-tuning span {
    color: red;
}
.spoiler-title{
	cursor: pointer;
	border: 2px solid;
	padding: 5px 20px;
	background: red;
	position: relative;
	color: white;
	top: 5px;
	font-family: sans-serif;
	left: 40px;
   }
@media only screen 
and (min-device-width : 320px) 
and (max-device-width : 568px) {
	.spoiler-title{
	display:none;
	visible:hidden;
   }
.spoiler-body{
	display:none;
	visible:hidden;
   }
}