@media only screen and (max-width: 750px){
    #nav>span{
        font-size: 8px;
    }

    main{
        background-image: url("resources/customersupport.jpg");
        background-repeat: 3;
        background-size: 300% 100%;
        background-position: center;
    }

    #cusSec, #opeSec, #admSec{
        background-image: url("resources/customersupport.jpg");
        background-repeat: 3;
        background-size: 300% 100%;
        background-position: center;
    }

    main>div>div{
        width: 32%;
        height: 150px;
    }

    main>div>div>i{
        font-size: 45px;
        margin-top: 15px;
    }
    main>div>div>h1{
        font-size: 20px;
        margin-top: 30px;
    }

    .bgForm>div{
        width: 80%;
        margin-left: 10%;
    }

    #contact{
        width: 50%;
        left: 25%;
    }

    #contact>div{
        font-size: 14px;
    }

    #contact>div:nth-child(2){
        font-size: 24px;
    }

    .formCss{
        width: 70%;
        margin-left: 15%;
    }

    .formCss>span{
        font-size: 24px;
        right: 10%;
    }

    .formCss>input:last-child{
        width: 60%;
        margin-left: 20%;
    }

    /* customer.html */
    #options>li{
        font-size: 14px;
        justify-content: space-between;
    }

    /* table */
    table{
        width: 350px;
        font-size: 12px;
    }
}