.about-container {
    background-color: #f8f9fa; /* nền nhạt */
}

.about-header h1 {
    font-size: 2.5rem;
}

.about-header p {
    font-size: 1.2rem;
    color: #6c757d;
}

.about-card {
    transition: transform 0.3s, box-shadow 0.3s;
}

    .about-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    }

    .about-card p {
        line-height: 1.8;
        color: #495057;
    }

.about-contact a {
    color: #0d6efd;
    text-decoration: none;
}

    .about-contact a:hover {
        text-decoration: underline;
    }

@media (max-width: 576px) {
    .about-header h1 {
        font-size: 2rem;
    }

    .about-header p {
        font-size: 1rem;
    }

    .about-card {
        padding: 2rem 1.5rem;
    }
}