body {
    font-family: 'Noto Sans JP', sans-serif;
}
h1 {
    text-align: center;
    font-weight: bold;
    margin-top: 70px;
     border-bottom: 2px solid #CC9D2D;
     max-width: 60%;
     margin: auto;
}
.announce_text {
    text-align: left;
    max-width: 50%;
    margin: 100px auto 150px;
    font-size: 18px;
}
td {
    font-size: 15px;
}
.date {
    text-align: right;
    max-width: 60%;
    margin: auto;
    font-size: 18px;
}
img {
     display: block;
  max-width: 60%;
  margin: 50px auto;
}

@media screen and (max-width: 600px) {
    h1 {
        max-width: 90%;
    }
    .date {
        font-size: 17px;
        max-width: 90%;
    }
    .announce_text {
        max-width: 90%;
        margin: 50px 10px;
        font-size: 16px;
    }
    img {
        max-width: 100%;
        padding-top: 40px;
    }
    td {
    font-size: 13px;
}
 }