h4 {
    text-align: center;
    font-size: 25px;
    font-family: monospace;
    margin-top: 100px;
    line-height: 2.5rem;
}

.campus_button {
    display: flex;
    flex: auto;
    justify-content: center;
    align-items: center;
    height: 50vh;
    background-color: white;
    margin: 0 50px 0px 50px;
}

h3 {
    text-align: center;
    font-size: 20px;
    line-height: 2.5rem;
    font-family: monospace;
}

a.btn--circle_5 {
    border-radius: 50%;
    line-height: 100px;
    width: 250px;
    height: 250px;
    padding: 0;
    -webkit-box-shadow: 0 5px 0 #5D99FF;
    box-shadow: 0 5px 0 #5D99FF;
    background-color: #8EB8FF;
    color: white;
    font-size: 30px;
    margin: 20px;
    padding: 75px 0 60px 0;
    font-family: 'Noto Sans JP', sans-serif;
}

a.btn--circle_5:hover {
    -webkit-transform: translate(0, 3px);
    transform: translate(0, 3px);
    -webkit-box-shadow: 0 2px 0 #5D99FF;
    box-shadow: 0 2px 0 #5D99FF;
    color: white;
}

.sp_campus_button {
    display: none;
}

a.btn--circle_6 {
    border-radius: 50%;
    line-height: 100px;
    width: 250px;
    height: 250px;
    padding: 0;
    -webkit-box-shadow: 0 5px 0 #FF69A3;
    box-shadow: 0 5px 0 #FF69A3;
    background-color: #FF97C2;
    color: white;
    font-size: 30px;
    margin: 20px;
    padding: 75px 0 60px 0;
    font-family: 'Noto Sans JP', sans-serif;
}

a.btn--circle_6:hover {
    -webkit-transform: translate(0, 3px);
    transform: translate(0, 3px);
    -webkit-box-shadow: 0 2px 0 #FF97C2;
    box-shadow: 0 2px 0 #FF97C2;
    color: white;
}

a.btn--circle_7 {
    border-radius: 50%;
    line-height: 100px;
    width: 250px;
    height: 250px;
    padding: 0;
    -webkit-box-shadow: 0 5px 0 #FF773E;
    box-shadow: 0 5px 0 #FF773E;
    background-color: #FF9872;
    color: white;
    font-size: 30px;
    margin: 20px;
    padding: 75px 0 60px 0;
    font-family: 'Noto Sans JP', sans-serif;
}

a.btn--circle_7:hover {
    -webkit-transform: translate(0, 3px);
    transform: translate(0, 3px);
    -webkit-box-shadow: 0 2px 0 #FF773E;
    box-shadow: 0 2px 0 #FF773E;
    color: white;
}

@media (max-width: 767px) {
    div#introduce img {
        max-width: 100%;
        margin: 20px 0 0 30px;
        width: 200px;
        display: block;
        box-shadow: 10px 10px #FF97C2;
    }
    h4 {
        max-width: 100%;
        padding: 0 10px 0 10px;
        font-size: 13px;
        line-height: 25px;
        margin-top: 30px;
    }
    .campus_button {
        display: none;
    }
    .sp_campus_button {
        display: block;
        margin:5px;
    }    
    a.btn-border {
        border: 2px solid #000;
        border-radius: 0;
        background: #fff;
    }
    a.btn-border:hover {
        color: #fff;
        background: #000;
    }
}