@media only screen and (min-width: 720px) and (max-width: 1980px) {

    .body {
        position: relative;
        width: 100%;
        height: auto;
    }

    .content_background {
        position: relative;
        width: 100%;
        height: auto;
    }

    .button_login {
        position: fixed;
        width: 20%;
        height: auto;
        bottom: 5%;
        left: 40%;
        margin: auto;
        background-color: #0F5D0A;
        text-align:center;
        cursor: pointer;
        border-radius: 10px;
        box-shadow: 5px 0 5px 1px #2E2E2E;
    }

    .font_login {
        font-family: Microsoft JhengHei, Arial, Verdana, Geneva, sans-serif;
        font-size: 30px;
        color: #ffffff;
        text-decoration: none;
        font-weight: bold;
        line-height: 55px;
    }
}

@media only screen and (max-width: 720px) {

    .body {
        position: relative;
        width: 100%;
        height: auto;
    }

    .content_background {
        position: relative;
        width: 100%;
        height: auto;
    }

    .button_login {
        position: relative;
        bottom: 10%;
        width: 40%;
        height: 50px;
        margin: auto;
        background-color: #0F5D0A;
        text-align:center;
        cursor: pointer;
        border-radius: 10px;
        box-shadow: 5px 0 5px 1px #2E2E2E;
    }

    .font_login {
        font-family: Microsoft JhengHei, Arial, Verdana, Geneva, sans-serif;
        font-size: 24px;
        color: #ffffff;
        text-decoration: none;
        font-weight: bold;
        line-height: 55px;
    }
}