.neirong img {
    display: block;
    width: 100%;
    margin-bottom: 20px;
    box-shadow: 3px 3px 10px #000;
}

.neirong p {
    font-size: .426667rem;
    line-height: 2;
    text-indent: 2em;
    margin-bottom: 10px;
}

.neirong .books_img p {
    text-align: center;
    font-size: 20px;
}

.neirong h3 {
    font-size: .533333rem;
    text-align: center;
}

.neirong strong {
    display: block;
    margin-bottom: .266667rem;
    font-size: .426667rem;
}

.m_nav {
    width: 100%;
}

.m_nav ul {
    display: flex;
    width: 100%;
    background: #3175be;
}

.m_nav ul li {
    font-size: .373333rem;
    text-align: center;
    flex: 1;
    line-height: .8rem;
    border-right: 1px solid #ccc;
}

.m_nav ul li a {
    color: #fff;
}