/*样式*/
.art-tit h3 {
    text-align: center;
    color: rgb(27, 27, 27);
    font-size: 27px;
    margin: 30px 0;
    font-weight: normal;}
.art-body{
    color: rgb(51, 51, 51);

    font-size: 16px;
    line-height: 30px;
    margin-bottom: 20px;}