h1, .h1, h2, .h2, h3, .h3, h4, .h4, h5, .h5, h6, .h6 {
    line-height: 1.1;
    font-weight: 500;
    letter-spacing: -0.03em;
}
h1, .h1 {
    color: #7DBE3C;
    font-size: 3rem;
    margin-top: 0.5rem !important;
    margin-bottom: 1.2rem !important;
}
h2, .h2 {
    color: #39f;
    font-size: 2.5rem;
    margin-top: 2rem !important;
    margin-bottom: 1rem !important;
    
}
h3, .h3 {
    color: #a6c76c;
    font-size: 1.6rem;
    margin-top: 1.5rem !important;
    margin-bottom: 0.8rem !important;
}

/* Chỉ áp dụng cho điện thoại */
@media (max-width: 767px) {
    h1, .h1, h2, .h2, h3, .h3, h4, .h4, h5, .h5, h6, .h6 {
        font-weight: 400;
    }
    h1, .h1 {
        font-size: 2.2rem !important;
    }
    h2, .h2 {
        font-size: 1.8rem;
    }
    h3, .h3 {
        font-size: 1.4rem;
    }
}