* {
    padding: 0;
    box-sizing: border-box;
}

img {
    border: 0;
    max-width: 100%;
}

body {
    background-image: url(../images/bg.jpg);
    background-repeat: no-repeat;
    background-size: auto;
    height: 980px;
    background-position: center top;
    background-color: #0a1f40;
}

.logo {
    margin-top: 5vh;
    display: inline-block;
    text-align: center;
}

.txt {
    display: inline-block;
    text-align: center;
    margin-top: 15vh;
}

.bt {
    margin-top: 5vh;
    display: inline-block;
    text-align: center;
    width: 90%;
}

.left {
    float: left;
    padding-left: 138px;
}

.right {
    float: right;
    padding-right: 138px;
}

.clear {
    clear: both;
}

.mobile {
    display: none;
}

.promo {
    float: right;
    width: 166px;
    height: 223px;
    margin-top: -100px;
    margin-right: 28%;
}


/*phone*/

@media only screen and (min-width: 320px) and (max-width: 767px) {
    body {
        background-image: url(../images/mbg.jpg);
        background-size: contain;
    }
    .logo {
        margin-top: 2vh;
    }
    .logo img {
        width: 20%;
    }
    .desk {
        display: none;
    }
    .bt {
        display: inline;
        text-align: center;
    }
    .mobile {
        display: block;
        margin: 0 auto;
        width: 40%;
        margin-top: 15%;
    }
    .mtxt {
        margin-top: 8%;
        margin-bottom: 18%;
    }
    .bt img {
        padding-top: 18%;
        width: 50%;
        display: block;
        margin: 0 auto;
    }
    .left {
        float: none;
        padding: 0;
    }
    .right {
        float: none;
        padding: 0;
    }
    .promo {
        margin-top: -5vh;
        margin-right: 10%;
        width: 18%;
    }
}