.tutorial {
    background-color: #F9F6F1;
    color: #F36D25;
    font-weight: 700; 
    font-size: 4vw;
}

.polygon {
    padding-top: 2%;
}

.iPhone .center .black {
    color: black;
    margin: 0% 10%;
    font-size: 4vw;
    font-weight: 500; 
    letter-spacing: 0.05em;
}

.image {
    padding-top: 2.5%;
    padding-bottom: 2.5%;
}

.tutorial img {
    margin: auto;
    width: 40%;
}

.polygon img {
    width: 20%;
}

.tutorial .pop {
    padding-top: 9%;
    font-size: 5.5vw;
    opacity: 0; /* 追加 */
}