main{
    font-size: 10px;
}
main *{
    line-height: 1em;
}
.main_contents{
    width: 66em;
}

.main_contents h2{
    font-size: 2em;

    font-weight: bold;
}
.main_contents img{
    width: auto;
    height: auto;
}
.main_contents p{
    margin: .5em 0;
    font-size: 1.6em;
    font-weight: 400;
    line-height: 1.7em;
}
.main_contents p span{
    font-size: 1em;
    line-height: 1.7em;
}
.main_contents b{
    font-size: 1em;
    line-height: 1.7em;
    font-weight: bold;
}
.main_contents a img{
    margin: 1em .5em;
    padding: .5em;
    background: #fff;
    box-shadow: 0 0 .4em rgba(0, 0, 0, .16);
}
.main_contents .entry-content div{
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7em;
}
.main_contents .entry-content div p{
    font-size: 1em;
}
.main_contents .entry-content div b{
    font-size: 1em;
}
.main_contents .entry-content div span{
    font-size: 1em;
}
@media screen and (max-width:1200px) {
    .main_contents{
        width: 55em;
    }
    .main_contents .entry-content div{
        font-size: 2vw;
        font-weight: 400;
        line-height: 1.7em;
    }
}
@media screen and (max-width:768px) {
    main{
        width: 92%;
        margin: 6em auto;
        font-size: 2.6666vw;
        flex-direction: column-reverse;
    }
    .main_contents a{
        max-width: 100%;
    }
    .main_contents{
        width: 100%;
    }
    .main_contents a img{
        margin: .5em 0;
        box-shadow: 0 0 .2em rgba(0, 0, 0, .16);
    }
    .main_contents .entry-content div{
        font-size: 4.2vw;
        font-weight: 400;
        line-height: 1.7em;
    }
    .main_contents a{
        max-width: 100%;
    }
    
    .main_contents{
        width: 100%;
    }
}