.single-bc {
    padding: 100px 0 20px;
    max-width: 800px;
    margin: 0 auto;
}
.breadcrumb {
    display: flex;
    justify-content: flex-end;
    font-size: 1.4rem;
    gap: 10px;
}
.breadcrumb .bc-link {
    color: #000b3a;
    text-decoration: underline;
}
.breadcrumb .bc-txt {
    position: relative;
    color: #989898;
}

.article-block {
    max-width: 800px;
    margin: 0 auto;
}
.meta-info .date {
    font-size: 1.3rem;
}
.post-title {
    font-size: 3rem;
    font-weight: 700;
}
.post-content {
    margin-top: 40px;
}
.post-inner h2 {
    font-size: 2rem;
    color: #000b3a;
    font-weight: 700;
    padding: 20px 0;
    border-bottom: solid 2px #000b3a;
    margin-bottom: 1em;
}
.post-inner h3 {
    font-size: 1.8rem;
    color: #000b3a;
    font-weight: 700;
    padding: 5px 0;
    padding-left: 20px;
    border-left: solid 4px #000b3a;
    margin: 2em 0 1.5em;
}
.post-inner p {
    font-size: 1.5rem;
    font-weight: 500;
    margin: 1em 0;
    line-height: 1.8;
}
@media screen and (max-width:640px) {
    .single-bc {
        padding: 40px 5% 20px;
        width: 100%;
        margin: 0 auto;
    }
    .article-block {
        width: 100%;
        padding: 0 5%;
    }
    .post-title {
        font-size: 2.4rem;
    }
    .post-content {
        margin-top: 25px;
    }
    .post-inner h2 {
        font-size: 1.8rem;
        padding: 15px 0;
    }
    .post-inner h3 {
        font-size: 1.6rem;
        padding-left: 15px;
    }
    .post-inner p {
        font-size: 1.4rem;
    }
    .breadcrumb {
        font-size: 1.2rem;
    }
}