.main_box{
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    max-width: 1200px;
    margin: 10px 0;
}
.box_z{
    width: 75%;
    display: flex;
    flex-direction: column;
    margin-inline: 10px;
    border: 1px solid #ebebeb;
}
.box_z > h1{
    font-size: 2.0rem;
    line-height: 40px;
    padding-left: 10px;
    border-bottom: #ebebeb 1px solid;
    
}
.book_tab{
    display: flex;
    flex-direction: column;
}
.book_tab > a{
    display: flex;
    justify-content: space-between;
    line-height: 40px;
    border-bottom: #ebebeb 1px solid;
    padding-inline: 10px;
}
.book_tab > a:nth-of-type(2n+1) {
    background-color: #ebebeb;
}
.book_dav{
    display: flex;
    justify-content: center;
}
.book_dav > p{
    line-height: 40px;
    font-size: 1.6rem;
}
.book_dav > a{
    line-height: 40px;
    font-size: 1.6rem;
    margin-inline: 10px;
}
.box_y{
    width: 23%;
    border: 1px #ebebeb solid;
}
.box_zxsj{
    line-height: 40px;
    font-size: 1.6rem;
    border: 1px #ebebeb solid;
    padding-left: 10px;
}
.box_zxsj_tab{
    display: flex;
    flex-direction: column;
}
.box_zxsj_tab > a{
    line-height: 40px;
    font-size: 1.6rem;
    border: 1px #ebebeb solid;
    padding-left: 10px;
}
.book_tab > a > p{
    width: 100%;
}
.book_tab_1{
    text-align: center;
    flex-wrap: nowrap;
}
.book_tab_2{
    text-align: end;
}
.main_box a:hover{
    /* 下划线 */
    text-decoration: underline;
    color: initial;
}
/* 分页导航 */
.book_dav {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
}
.book_dav > ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}
.book_dav > ul > li > a{
    display: block;
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    border: 1px solid #d8d8d8;
}
.book_dav > ul > li > a:hover {
    border: #c00 solid 1px;
    color: #c00;
}
.book_dav > div {
    display: flex;
    justify-content: center;
    align-items: center;
}
.book_dav > div > p {
    font-size: 1.6rem;
    margin-left: 5px;
}
.book_dav > div > span {
    font-size: 1.6rem;
    color: red;
}
.book_dav > div > input {
    appearance: none;
    border-radius: 0;
    width: 30px;
    height: 35px;
    margin: 0;
    padding: 0;
    font-size: 1.4rem;
    text-align: center;
    border: 1px solid #d8d8d8;
}
.book_dav > div > button {
    all: unset;
    width: 50px;
    height: 35px;
    line-height: 35px;
    font-size: 1.4rem;
    text-align: center;
    border: 1px solid #d8d8d8;
    margin: 0;
    padding: 0;
    cursor: pointer;
}
/* 当窗口宽度小于或等于1200像素时，应用以下样式 */
@media screen and (max-width: 1200px) {
    .book_tab > a > p {
        width: auto;
    }
    .box_y {
        display: none;
    }
    .box_z {
        width: 100%;
    }
    .book_tab_2{
        display: none;
    }
    .book_tab_1{
        width: 120px !important;
        text-align: end;
    }
}
/* 当窗口宽度小于或等于800像素时，应用以下样式 */
@media screen and (max-width: 800px) {
    .book_dav{
        flex-direction: column;
    }
    .book_dav > div{
        margin-top: 10px;
    }
}