@media screen and (max-width: 639px) {
    #outer,
    #Page,
    #footer,
    #wizard,
    .wing-ja-form {
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    #header,
    #content,
    #footer {
        max-width: 100%;
        overflow-x: auto;
    }

    .wing-ja-form {
        width: calc(100vw - 40px);
        max-width: calc(100vw - 40px);
    }
}