.article-summary {
    background: #F5F5F5;
    padding: 20px;
    margin-bottom: 30px;
}

@media (min-width: 768px) {
    .article-summary {
        padding: 30px;
    }
}

@media (min-width: 1200px) {
    .article-summary {
        padding: 40px;
        max-width: 1280px;
        margin: 0 auto 30px auto;
    }
}

.article-summary h2 {
    margin-top: 0;
    font-size: 1.5rem;
    font-weight: bold;
}

.article-summary p {
    color: #3A3A3A;
    padding-bottom: 15px;
    margin-bottom: 15px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
    line-height: 1.6;
}

.article-summary p:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

@media (min-width: 992px) {
    .article-summary p {
        font-size: 18px;
    }
}