.movie_wrapper {
    position: relative;
    margin: 30px 0;
}
.movie_wrapper:before {
    content: "";
    display: block;
    padding-top: 56%;
}
.movie_wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
.manual_detail h1 {
    font-size: 140%;
}
.manual_detail h3 {
    font-size: 120%;
    margin: 48px 0 0;
}
.manual_detail p {
    font-size: 15px;
    line-height: 1.6;
}
.manual_detail .image {
    margin: 30px 0;
}