/*content css*/
content{
    height:950px;
}

.row1{
    height: 304px;
    margin: 15px 0 15px 0;
}
.paper{
    height: 304px;
}
.intro img{margin-top: 10px;}
.intro{width: 735px;
    height: 304px;}
.intro .arti{
margin-top:5px;}
.intro img{margin-top: 10px;}
.row2{
    height: 304px;
    margin-bottom: 15px;
}
.certifi .divc{
    margin-top: 10px;
    height: 232px;
}
.exper .arti{
    width: 100%;
    height: 210px;
    margin-top: 10px;
}
.video .divc{
    margin-top: 10px;
    height: 232px;
}
.textbook .divc{
    margin-top: 10px;
    height: 222px;
}
.rollpic{
    margin-top: 10px;
    height: 222px;
}
.row3{
    height: 330px;
}
.video{
    margin-left: 15px;
}

.pic{width: 735px;
    height: 100%;}