.site-explain{
    width:100%;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 40px;
    padding-right: 40px;
    padding-bottom: 100px;
    margin-top: 40px;
}
.site-explain img{
    width: 100%;
}
.single section h1{
    font-size: 1.5rem;
    color: #4b4b4b;
    padding: 10px;
    padding-left: 0;
    margin-bottom: 40px;
    border-bottom: solid 4px #4b4b4b;
}
.single section h2{
    font-size: 1.2rem;
    background: #4b4b4b;
    color: #ffffff;
    padding: 10px;
    margin-top: 40px;
    margin-bottom: 30px;
}
.single section h3{
    font-size: 1.1rem;
    font-weight: bold;
    color: #4b4b4b;
    padding: 10px;
    padding-left: 0;
    margin-top: 20px;
}
.single section p{
    font-size: 1rem;
    line-height: 1.5;
}
@media screen and (max-width:1025px){
}
@media screen and (max-width:600px){
    .site-explain{
        padding-left: 20px;
        padding-right: 20px;
        padding-bottom: 80px;
        margin-top: 20px;
    }
    .single section h1{
        font-size: 1.2rem;
        color: #4b4b4b;
        padding: 8px;
        padding-left: 0;
        margin-bottom: 20px;
        border-bottom: solid 2px #4b4b4b;
    }
    .single section h2{
        font-size: 1.1rem;
        padding: 6px;
        margin-top: 20px;
        margin-bottom: 20px;
    }
    .single section h3{
        font-size: 1rem;
        font-weight: bold;
        color: #4b4b4b;
        padding: 8px;
        padding-left: 0;
    }
    .single section p{
        font-size: 1rem;
        line-height: 1.4;
    }
}
/*========
投稿フレックス
=========*/
.single .columns-4{
    display: flex;
    flex-wrap: wrap;
}