html,
body {
    width: 100%;
    margin: 0px !important;
    padding: 0px !important;
}

@media (max-width: 1650px) {
    body {
        background-size: 1650px;
    }
}

@media (max-height: 650px) {
    body {
        height: 550px;
    }
}

.notice {
    position: absolute;
    right: 10;
    bottom: 10;
    color: white;
}

.box {
    height: 100%;
    visibility: hidden;
    display: block;
    position: relative;
}

.container-fluid {
    margin-left: auto;
    margin-right: auto;
}

.img-cube {
    width: 580px;
    height: 690px;
    margin-top: 70px;
}

.img-logo {
    width: 128px;
    margin-left: 226px;
    margin-top: 180.5px;
    position: absolute;
}

.img-aclass {
    width: 180px;
    margin-left: 226px;
    margin-top: 580.5px;
    position: absolute;
}

.img-btn-blue {
    width: 380px;
    height: 50px;
    margin-left: 100px;
    margin-top: 322.5px;
    position: absolute;
    cursor: pointer;
}

.img-btn-green {
    width: 380px;
    height: 50px;
    margin-left: 100px;
    margin-top: 617.5px;
    position: absolute;
    cursor: pointer;
}

.img-btn-gray {
    width: 380px;
    height: 50px;
    margin-top: 817.5px;
    margin-left: 100px;
    position: absolute;
    cursor: pointer;
}

.text-btn-blue {
    z-index: 1;
    margin-left: 226px;
    margin-top: 335px;
    position: absolute;
    color: white;
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 2px;
    pointer-events: none;
}

.text-btn-green {
    z-index: 1;
    margin-left: 226px;
    margin-top: 630px;
    position: absolute;
    color: white;
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 2px;
    pointer-events: none;
}

.text-btn-gray {
    z-index: 1;
    margin-left: 226px;
    margin-top: 830px;
    position: absolute;
    color: white;
    font-size: 20px;
    font-weight: bold;
    letter-spacing: 2px;
    pointer-events: none;
}

.text-btn-gray a {
    color: white;
    text-decoration: none;
}

.text-btn-gray-hint {
    color: white;
    margin-left: 226px;
    margin-top: 830px;
    position: absolute;
    color: white;
    font-size: 14px;
}

.text-btn-gray-hint a {
    color: white;
    text-decoration: none;
}

.text-ies5 {
    margin-left: 200px;
    margin-top: 90px;
    position: absolute;
    color: white;
    font-size: 16px;
    font-weight: bold;
}

.text-teacher {
    margin-left: 226px;
    margin-top: 272.5px;
    position: absolute;
    color: white;
    font-size: 20px;
    font-weight: bold;
}

.text-teacher-origin-1 {
    margin-left: 226px;
    margin-top: 412.5px;
    position: absolute;
    color: #8f99a1;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 2px;
}

.text-teacher-origin {
    margin-left: 226px;
    margin-top: 412.5px;
    position: absolute;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 2px;
}

.text-teacher-origin a {
    color: #7c94a6;
    text-decoration: none;
}

.text-student {
    margin-left: 226px;
    margin-top: 562.5px;
    position: absolute;
    color: black;
    font-size: 20px;
    font-weight: bold;
}

.text-student-origin-1 {
    margin-left: 226px;
    margin-top: 702.5px;
    position: absolute;
    color: #8f99a1;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 2px;
}

.text-student-origin {
    margin-left: 226px;
    margin-top: 702.5px;
    position: absolute;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 2px;
}

.text-student-origin a {
    color: #647887;
    text-decoration: none;
}


/* @media (max-width: 580px) {
    .box {
        height: 100%;
        visibility: hidden;
        display: block;
        position: relative;
    }
    .container-fluid {
        margin-left: auto;
        margin-right: auto;
        width: 320px;
    }
    .img-cube {
        width: 320px;
        height: 520px;
        margin-top: 100px;
    }
    .img-logo {
        width: 100px;
        margin-left: 226px;
        margin-top: 180.5px;
        position: absolute;
    }
    .img-btn-blue {
        width: 140px;
        margin-left: 100px;
        margin-top: 322.5px;
        position: absolute;
        cursor: pointer;
    }
    .img-btn-green {
        width: 140px;
        margin-left: 100px;
        margin-top: 617.5px;
        position: absolute;
        cursor: pointer;
    }
    .img-btn-gray {
        width: 140px;
        margin-top: 817.5px;
        margin-left: 100px;
        position: absolute;
        cursor: pointer;
    }
} */