@media (max-width:991px){
    .footer::after {
        content: '';
        width: 0;
        height: 0;
        border-style: solid;
        border-width: 0 250px 50px 250px;
        border-color: transparent transparent #f4f4f4;
        position: absolute;
        top: -50px;
        left: 50%;
        transform: translateX(-50%);
    }
}
@media (max-width:767px){
    .us-themes .single-section .hvr-float-shadow{
        margin-bottom: 35px;
    }
    .us-themes{
        padding: 100px 70px;
    }
    .header .title h1{
        font-size: 22px;
        line-height: 36px;
    }
    .footer h3.text-40{
        font-size: 18px;
        letter-spacing: 1px;
    }
    .computer_pic img {
        position: relative;
        bottom: 0px;
        width: 100%;
    }
    .responsive_details {
        margin-bottom: 150px;
        height: auto;
    }
    .responsive_content h3 {
        padding-top: 50px;
    }
}
@media (max-width:580px){
    .header{
        padding: 150px 15px 200px;
    }
    .us-themes{
        padding: 100px 0px;
    }
}
@media (max-width:460px){
    .footer h3.text-40 {
        font-size: 15px;
    }
    .header .btn-demo{
        width: 200px;
        margin: 0 auto;
        display: block;
    }
    .header .btn-demo + .btn-demo{
        margin-left: auto;
        margin-top: 15px;
    }
    .feature_item_area .col-xs-6{
        width: 100%;
    }
    .feature_item_area .tittle_area h3{
        font-size: 20px;
    }
    .footer h3.text-40 {
        font-size: 13px;
        line-height: 26px;
    }
}