#above {
    position: relative;
    top: 60px;
    width: 100%;
    height: 200px;
}

#above img {
    display: block;
    width: 100%;
    height: 200px;
    object-fit: unset;
}

#above .mask {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .44);
    z-index: 1;
}

#above .header {
    display: none;
}

.logos{
    display: block;
    margin: 80px auto 20px;
    width: 70px;
    height: 70px;
}

.desc{
    margin: 0 auto 20px;
    width: 90%;
    text-align: justify;
    color: #494949;
}

.cert_title{
    margin: 14px auto 20px;
    text-align: center;
    font-size: 24px;
    font-weight: 500;
    color: #4d4d4d;
}

.cert{
    margin: 20px auto;
    width: 90%;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.cert img{
    margin-bottom: 20px;
    max-width: 200px;
    width: 48%;
    height: calc(48% / 0.72);
    cursor: pointer;
}

.intr{
    display: block;
    margin: 20px auto;
    width: 90%;
    text-align: justify;
    font-size: 14px;
    color: #666;
}

.tk{
    padding: 14px;
    margin: 0 auto 20px;
    width: calc(90% - 28px);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    background: #f5f5f5;
    border-radius: 8px;
}

.tk li{
    margin: 0 8px;
    flex: 1;
    min-width: 290px;
    display: flex;
    flex-direction: column;
}

.tk li img{
    width: 100%;
    /* height: calc(100% / 0.562); */
    height: 580px;
    border-radius: 8px;
}

.tk li p{
    margin: 16px auto;
    padding: 0 8px;
    font-size: 15px;
    color: #494949;
    text-align: center;
    font-weight: 400;
}

#footer{
    /* position: fixed; */
    width: 100%;
    /* bottom: 0; */
}