.yoso {
    border: solid 3px rgba(0, 0, 0, 0);
    padding: 20px;
}
.radi {
    border: solid 3px white;
    padding: 20px;
}
.ag {
    font-size: 260%;
    font-family: Arial;
}
.gyo {
    border: solid 1px red;
    background-color: black;
    padding: 0px 20px 0px 20px;
    line-height: 4;
}
.ippei {
    width: 50%;
    height: 300px;
    border: solid 2px #ff0000;
    border-radius: 4px;
    background-image: url(../img/css7.png);
    background-size: cover;
}
.fl {
    width: 100%;
    padding: 10px 10px 10px 0px;
    background-color: white;
    color: black;
    border: solid 2px #ff0000;
    border-radius: 4px;
}
.fl img {
    padding-left: 10px;
    float: left;
}
#yougo {
    border: solid deepskyblue 1px;
    line-height: 200%;
    padding: 20px;
}
@media screen and (max-width: 600px) {
    /* 画面の横幅が max-widthに書き込んだ数値以下になったらここに書き込まれたCSSに切り替える */
}