.onesiam-colum {
    background-color: #c5c5c5;
    font-family: 'Kanit', Arial, sans-serif;
    padding: 20px 0;
    margin-bottom: 40px;
    width: 99vw;
    border-radius: 0;
}

.container {
    display: flex;
    align-items: stretch;
    /* ทำให้ความสูงของ box เท่ากัน */
    justify-content: space-around;
    margin-top: 30px;
    gap: -5px;
}

.column {
    font-family: 'Kanit', Arial, sans-serif;
    width: 24%;
    color: #232b33;
}

.column h2 {
    font-family: 'Kanit', Arial, sans-serif;
    font-size: 1.5rem;
    color: #232b33;
    margin-bottom: 10px;
    font-weight: bold;
}

.column p {
    font-family: 'Sarabun', Arial, sans-serif;
    font-size: 1.2rem;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

.column-link {
    display: block;
    color: inherit;
    text-decoration: none;
    height: 100%;
}

.column-link:hover {
    background: #c5c5c5;
    border-radius: 15px;
}

@media (max-width: 900px) {
    .container {
        flex-direction: column;
        gap: 24px;
        align-items: stretch;
    }

    .column {
        width: 100%;
        margin-bottom: 0;
    }

    .column h2 {
        font-size: 1.25rem;
    }

    .column p {
        font-size: 1.05rem;
    }
}

@media (max-width: 600px) {
    .onesiam-colum {
        padding: 10px 0;
    }

    .container {
        gap: 16px;
        margin-top: 10px;
    }

    .column h2 {
        font-size: 1.1rem;
    }

    .column p {
        font-size: 0.95rem;
    }
}