@media all and (max-width:991px){
    .left-column {
        width: 100%;
    }
    .right-column {
        width: 100%;
        -webkit-box-ordinal-group: 0;
            -ms-flex-order: -1;
                order: -1;
    }
    .phone-img {
        margin-right: 0px;
        margin-left: 0px;
        margin-bottom: 40px;
    }
    .content-descriptions {
        max-width: 500px;
        margin: auto;
    }
}
@media all and (max-width:575px){
    .content-descriptions h2 {
        font-size: 24px;
        padding-bottom: 10px;
    }
    .content-descriptions h4 {
        font-size: 14px;
        padding-bottom: 10px;
    }
    .content-descriptions p {
        font-size: 12px;
    }
    .list-item ul li {
        font-size: 18px;
    }
    .app-store-img img {
        max-width: 104px;
    }
    .footer-grid {
        -webkit-box-orient: horizontal;
        -webkit-box-direction: reverse;
            -ms-flex-direction: row-reverse;
                flex-direction: row-reverse;
    }
    .download-content p {
        font-size: 14px;
        width: -webkit-max-content;
        width: -moz-max-content;
        width: max-content;
    }
    .download-content p span {
        display: block;
    }
    .main-content {
        margin-bottom: 90px;
    }
    .main-content::after {
        bottom: 90px;
    }
    .list-item {
        padding-top: 20px;
        padding-bottom: 20px;
    }
    .protect-title {
        padding-bottom: 60px;
    }
    .protect-title h3 {
        font-size: 18px;
        position: relative;
        z-index: 999;
    }
    .protect-title h3 a {
        font-size: 23px;
        margin-left: 15px;
    }
}