#content {
    padding-top: 0.2rem;
}

.demo-image {
    width: 2.6rem;
    float: left;
    margin-right: 0.23rem;
    margin-left: 0.23rem;
    padding-bottom: 15px;
}

.book_image {
    width: 100%;
    border-radius: 10px;
    position: relative;
    display: inline-block;
    overflow: hidden;
}

.demonstration {
    display: block;
    color: #8492a6;
    font-size: 16px;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
}

.el-image__inner {
    vertical-align: top;
    width: 100%;
    height: 100%;
}

.grade_title {
    text-align: left;
    line-height: 1.2rem;
    height: 1.2rem;
    background-color: #F5F5F5;
    color: #000;
    padding-left: 0.5rem;
    border-bottom: 1px solid #8BC34A;
}

.grade_box {
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.grade {
    text-align: center;
    line-height: 1.2rem;
    width: 50%;
    float: left;
    height: 1.2rem;
    background-color: #F5F5F5;
    color: #000;
}

.grade_select {
    background-color: #4CAF50;
    color: #fff;
}

.grade_item_list {
    padding-left: 0.4rem;
    padding-right: 0.4rem;
    padding-top: 0.2rem;
    font-size: 14px;
    overflow: hidden;
    background-color: #fdfdfd;
}

.grade_item_box {

    overflow: hidden;
}

.grade_item {
    width: 30%;
    line-height: 1rem;
    text-align: center;
    margin-right: 0.11rem;
    margin-left: 0.11rem;
    margin-top: 0.4rem;
    border: 1px solid #fb7299;
    border-radius: 10px;

}

.OpenInAppButton {
    width: 45%;
    display: block;
    font-size: 15px;
    font-weight: 500;
    line-height: 36px;
    color: #fff;
    text-align: center;
    background: #8bc34a;
    border-radius: 18px;
}