@media(max-width:450px) {
    .navbar-a {
        color: #333333;
        font-size: 1.05rem;
        text-decoration: none;
        font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
        padding: 10px;
        line-height: 50px;
    }

    .cancerheal-logo-image {
        width: 144px;
        height: 45.65px;
        margin-left: 15px;
        padding: 5px 0 0;
    }

    .checkbtn {
        line-height: 70px;
    }

    ul {
        position: fixed;
        flex-direction: column;
        width: 100%;
        height: fit-content;
        background-color: #f5f5f5;
        top: 54px;
        left: -100%;
        text-align: left;
    }

    nav ul li {
        display: block;
        width: 100%;
        line-height: 20px;
    }

    /* NAVBAR ENDING */
    .contactus-1 {
           background-image: url("/images/slider.png");
        background-size: cover;
        /* background-position: center; */
        height: fit-content;
        width: 100%;
    }

    .contactus-1-content {
        text-align: center;
        height: fit-content;
        padding-top: 80px;
    }

    .contactus-1-h2 {
        font-size: 2.5rem;
        font-weight: 700;
        color: #fff;
        font-family: Arial, Helvetica, sans-serif;
    }

    .contactus-1-h3 {
        padding-top: 20px;
        height: 10vh;
        font-size: 1rem;
        font-weight: 600;
        color: #fff;
        font-family: Arial, Helvetica, sans-serif;
    }

    /* CONTACTUS-1 ENDING */
    /* CONTACTUS PART-2 STARTING */
    .contactus-2 {
        flex-wrap: wrap;
        gap: 10px;
    }

    .contactus-2-div_1 {
        width: 330px;
        height: 410px;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        border-radius: 0.375rem;
    }

    .contactus-2-div_2 {
        width: 330px;
        height: 410px;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        border-radius: 0.375rem;
    }

    .contactus-2-div_3 {
        width: 330px;
        height: 410px;
        margin-top: 0px;
        box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        border-radius: 0.375rem;
    }

    /* CONTACTUS PART-2 ENDING */

    /* CONTACTUS PART-3 STARTING */

    .contactus-3 {
        background-image: none;
    }

    .contactus-3-div {
        float: none;
        margin-right: 0px;
    }

    .contactus-3-h2_1 {
        color: #333;
        font-size: 2.2rem;
        text-align: center;
        font-family: Arial, Helvetica, sans-serif;

    }

    .contactus-3-h2_2 {
        color: #148bfb;
        font-size: 2.2rem;
        border-bottom: 0px;
        text-align: center;
        font-family: Arial, Helvetica, sans-serif;
    }

    .contactus-3-h2_3 {
        color: #148bfb;
        font-size: 2.2rem;
        text-align: center;
        font-family: Arial, Helvetica, sans-serif;
    }

    .contactus-3-div-3 {
        flex-direction: column;
        gap: 1rem;
        margin-top: 2rem;
        align-items: center;
        /* margin-left:90px; */
    }

    .contactus-3-div-2 {
        /* height:100vh; */
        position: relative;
        left: 2px;
    }

    .contactus-3-div-1-div {
        flex-direction: column;
    }

    /* CONTACTUS PART-3 ENDING */
    /* <!-- CONTACTUS PART-4 STARTING --> */
    .contactus-4 {
        margin-top: 50px;
    }

    /* <!-- CONTACTUS PART-4 ENDING --> */

}