*{
    padding: 0;
    margin: 0;
}
a{
    text-decoration: none;
}
li{
    list-style: none;
}
.art_article{
    width: 1420px;
    margin: 0 auto;
    min-height: 400px;
}
.article_title{
    text-align: center;
    margin-top: 30px;
    font-size: 32px;
}
.article_time{
    text-align: center;
    margin-top: 10px;
    font-size: 22px; 
}