@media (max-width: 960px) {
    .index-form-control {
        width: 100%;
    }

    .index-form-control form {
        width: 100% !important;
    }

    .index-form-control .form-group {
        width: 50% !important;
    }

    .index-form-control .index-submit {
        margin-left: calc(50% - 80px) !important;
        margin-top: 10px !important;
    }
}