.ib {
    display: inline-block;
}
.opinion_title {
    margin-bottom: 1em;
    text-align: center;
    color: #74acd4;
    line-height: 1.5;
    font-weight: bold;
    font-size: 24px ;
}
.opinion_sentence {
    max-width: 800px;
    margin: 0 auto;
    font-size: 14px;
}
.mb05 {
    margin-bottom: 0.5em;
}
.opinion_button {
    display: block;
    width: fit-content;
    padding: 0.2em 1em;
    margin: 30px auto 15px;
    color: #159485;
    border: 1px solid #159485;
    background-color: #fff;
    box-shadow: 2px 2px 2px #517c77;
    font-size: 16px;
}
.opinion_button:hover {
    transition: 0.2s;
    color: #fff;
    background-color: #159485;
}
.ob_announce {
    text-align: center;
}
@media screen and (max-width: 640px) {
    #contents {
        padding-top: 20px;
    }
    .breadcrumbs {
        width: 92%;
        margin: -10px 4% 10px;
    }
}
@media screen and (min-width: 641px) {
    .opinion_title {
        margin-bottom: 1.5em;
        color: #74acd4;
        font-size: 30px ;
    }
    .opinion_sentence {
        font-size: 18px;
    }
    .opinion_button {
        padding: 0.2em 1em;
        margin: 50px auto 20px;
        font-size: 22px;
    }
    .ob_announce {
        font-size: 18px;
    }
    .ml025_pc {
        margin-left: 0.25em;
    }
}