body {
        margin: 0;
    }

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

    @media screen and (max-width: 800px) {
        .pcImage {
            display: none;
        }

        .spImage {
            display: block;
        }

        #menu-container {
            display: block;
        }
    }

    @media screen and (min-width: 801px) {
        .spImage {
            display: none;
        }

        .pcImage {
            display: block;
        }

        #menu-container {
            display: none;
        }
    }