* {
    box-sizing: border-box;
}

html {
    font-size: 3.125vw;
}

body {
    position: relative;
}

.tbpc, .pc {
    display: none;
}

img {
    width: 100%;
    height: auto;
}

.myFirstBtn {
    position: absolute;
    z-index: 1;
    top: 300vw;
    width: 90%;
    left: 50%;
    transform: translateX(-50%);
}

.mySecondBtn {
    position: absolute;
    z-index: 1;
    bottom: 106.5vw;
    width: 90%;
    left: 50%;
    transform: translateX(-50%);
}

footer {
    background: #30a6e5;
    text-align: center;
    position: absolute;
    bottom: 0;
    width: 100%;
    color: #fff;
    line-height: 1.3;
    font-size: 1.2rem;
}

footer a {
    color: #fff;
}


@media screen and (min-width: 768px){
    .tbpc {
        display: inherit;
    }

    .mb {
        display: none;
    }
}

@media screen and (min-width: 768px) and (orientation: landscape){
    html {
        font-size: 0.78125vw;
    }

    .pc {
        display: inherit;
    }

    .mbtb {
        display: none;
    }

    .myFirstBtn {
        top: 25.1%;
        width: 28%;
    }

    .mySecondBtn {
        width: 28%;
        bottom: 8.55%;
    }

    footer {
        font-size: 1.5rem;
        padding: 1rem 0;
    }
}


@media screen and (max-width :768px) {

}