.side-main .tab-main-txt h3{
    margin-bottom:30px;
}
.side-main .tab-main-txt .tab-main-item{
    /*text-indent:2em;*/
}
.side-main .tab-main-txt .app-center ul{
    display: flex;
    flex-wrap: wrap;
}
.side-main .tab-main-txt .app-center ul li{
    width:25%;
    margin-bottom:20px;
    text-align: center;
}
.side-main .tab-main-txt .app-center ul li img{
    width:50%;
    margin-bottom:10px;
}
.side-main .tab-main-txt .app-center ul li img:hover{
    transform:rotate(360deg);
    transition: 1s;
}

.tab-main-item-list{
    margin:40px 50px;
    line-height:35px;
}