#app {
    width: 100%;
    position: relative;
    padding-bottom: 1rem;
}

.bottom_download_box {
    width: 100%;
    margin: 0 auto;
    min-width: 320px;
    max-width: 414px;
    position: fixed;
    bottom: 0;
    padding: 0.2rem 0.4rem;
    background: rgba(0, 0, 0, 0.9);
}

.bottom_download_box .logo {
    width: 0.75rem;
    margin-right: 0.2rem;
}

.bottom_download_box .title {
    color: #fff;
    font-size: 0.3rem;
    line-height: .4rem;
}

.bottom_download_box .desc {
    color: #828282;
    font-size: 0.24rem;
    line-height: .4rem;
}

.bottom_download_box .download_button {
    padding: 0.23rem 0.3rem;
    background: #00c6ad;
    font-size: .28rem;
    font-weight: bold;
    color: #fff;
    border: none;
    border-radius: 0.2rem;
}

.banner {
    width: 100%;
    height: 7.09rem;
    background: url(../images/backgrund.png)no-repeat;
    background-size: 100% 100%;
}

.banner .logo {
    width: 1.6rem;
    margin: 0 auto;

}

.banner .logo img {
    width: 100%;
    margin-top: 0.8rem;
}

.banner .app_name {
    width: 100%;
    text-align: center;
    font-size: 0.48rem;
    color: #01c2b1;
    font-weight: bold;
    margin-top: 0.4rem;
}

.banner .desc {
    width: 100%;
    min-height: 1rem;
    padding: 0 0.4rem;
    text-align: center;
    font-size: 0.4rem;
    color: #01c2b1;
    font-weight: bold;
    margin-top: 0.4rem;
}

.banner .download_button {
    width: 5.8rem;
    padding: 0.38rem;
    background: #ff9000;
    font-size: .32rem;

    font-weight: bold;
    color: #fff;
    border: none;
    border-radius: 1.2rem;
    display: block;
    margin: 0 auto;
    margin-top: 0.4rem;
}

.nav {
    width: 100%;
    margin-top: 0.5rem;
}

.nav .nav_box {
    /*margin: 0 auto;*/
    display: inline-block;
    border: 2px solid #c2f1eb;
    border-radius: 0.5rem;
}

.nav .nav_list {
    min-width: 2.5rem;
    max-width: 3.2rem;
    text-align: center;
    display: inline-block;
    padding: 0.2rem 0.4rem;
    background: #fff;
    font-size: 0.26rem;
    border-radius: 0.5rem;
}

.nav .nav_box .on {
    background: #00c6ad;
    border-radius: 0.5rem;
    color: #fff;
}

.book_list {
    width: 100%;
    margin-top: 0.5rem;
    padding-bottom: 1rem;
}

.book_lists {
    width: 1.82rem;
    /*height: 3.22rem;*/
    margin-left: 0.51rem;
    margin-top: 0.4rem;
    display: inline-block;
}

.book_lists img {
    width: 1.82rem;
    height: 2.24rem;
    border-radius: 0.1rem;
    object-fit: cover;
    box-shadow: rgba(0, 0, 0, 0.1) 5px 5px 8px 0px;
}

.book_list .book_name {
    /*height: 0.7rem;*/
    margin-top: 0.28rem;
    width: 100%;
    font-size: 0.28rem;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}