.open-erweima{

}
.erweima{
    width: 500px;
    height: 200px;
    display: none;
}
.course-img{
    width: 300px;
    height: 200px;
}
.deadline-apply{
    margin: 50px 0;
}
#announce{
    padding-top: 200px;
}
.logo a img{
    width: 300px;
    height: 50px;
}