/* 특허 및 허가 */
.sub-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.875rem;
}
.sub-container > div {
    max-width: 270px;
}
.sub-container img {
    width: 100%;
    padding: 2.625rem 1.5rem;
    background-color: #E2E2E2;
    border-radius: 20px 20px 0 0;
}
.sub-container > div p {
    color: #fff;
    font-size: 1.2rem;
    text-align: center;
    padding: 1.2rem 0;
    background-color: var(--primary-color);
    border-radius: 0 0 20px 20px;
}

@media (max-width: 991px) {
    div.sub-container {
        max-width: 600px;
    }
    .sub-container > div {
        width: 100%;
        margin: 0 auto;
    }
    .sub-container > div p {
        font-size: 0.875rem;
    }
    .sub-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .sub-container {
        grid-template-columns: repeat(1, 1fr);
    }
}