body{
    background: #f8f8f8;
}
.main{
    opacity: 0;
    transition:.5s;
}
.richtext-content{
    width: 1200px;
    margin:50px auto;
}
.richtext-wrap{
    padding:61px;
    height: 100%;
}
p{
    margin-top:10px;
}