.book-down-panel {
    padding: 30px;
}
.book-down-content {
    overflow: hidden;
}
.book-down-item {
    float: left;
    width: 50%;
    text-align: center;
}
.book-down-item > p {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #222;
}
.book-down-img {
    margin-bottom: 17px;
}
.book-down-img > img {
    max-width: 150px;
    display: block;
    margin: 0 auto;
    min-height: 150px;
}
.book-down-btn {

}
.book-down-btn > div {
    max-width: 140px;
    width: 100%;
}
.book-down-tips {
    font-size: 12px;
    padding: 6px 30px 20px;
    border-top: 1px solid #ddd;
    color: #888;
    line-height: 20px;
    text-align: left;
    background: #fff;
    border-bottom-left-radius: 2px;
    border-bottom-right-radius: 2px;
}