.certificate-list{
    max-width: 1300px;
    margin: 0 auto;
}
.certificate{
    width: 75%;
    max-width: 980px;
    margin: 0 auto;
}
.certificate-ul {
    width: 100%;
}
.certificate-li {
width: 4.07rem;
    font-size: 0.2rem;
    color: #000;
    font-weight: bold;
    float: left;
    margin-right: 1rem;
    margin-bottom: 1.2rem;
}
.certificate-ul .certificate-li:nth-child(2n){
    margin-right: 0;
}
.certificate-li img{
    width: 4.07rem;
    height: 5.4rem;
    margin-bottom: 0.2rem;
}