#container-b {
    margin: 0 auto;
    width: 1250px;
    background: white;
    min-height: 2100px;
    overflow-x: hidden;
    overflow-y: auto;
}

#container-b ::-webkit-scrollbar {
    width: 10px;
    opacity: 0.5;
}

#container-b ::-webkit-scrollbar-thumb {
    /*滚动条里面小方块*/
    border-radius: 10px;
    background-color: #f1f1f1;
    background-image: -webkit-linear-gradient(
            45deg,
            rgba(255, 255, 255, 0.2) 15%,
            transparent 15%,
            rgba(255, 255, 255, 0.2) 25%,
            transparent 25%,
            rgba(255, 255, 255, 0.2) 50%,
            transparent 50%,
            rgba(255, 255, 255, 0.2) 75%,
            transparent 75%,
            transparent
    );
}

#container-b ::-webkit-scrollbar-track {
    /*滚动条里面轨道*/
    box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
    background: rgba(183, 183, 183, 0.51);
    border-radius: 10px;
}

.books-top {
    background: white;
    margin-top: 50px;
    display: flex;
    border: lightgrey solid 1px;
}


.bt-img img {
    height: 220px;
    width: 220px;
    margin: 20px;
}

.bt-text {
    margin-top: 20px;
}

.bt-text a {
    font-size: 18px;
    font-weight: bold;
}

.bt-text p {
    display: flex;
    color: black;
    font-weight: bold;
    font-size: 16px;
}

.bt-text p span {
    font-size: 16px;
    font-weight: 400;
    margin-left: 20px;
}

.books-summary {
    margin-top: 40px;
    background: #eee;
    padding: 20px;
    margin-left: -5px;
}

.books-summary a {
    font-size: 18px;
    color: black;
    font-weight: bold;
    padding-bottom: 10px;
}

.books-summary p {
    border-top: lightgrey solid 1px;
    padding-top: 15px;
    line-height: 25px;
    font-size: 16px;
    font-weight: 400;
    margin-top: 20px;
    overflow: hidden !important;
    display: -webkit-box !important;
    -webkit-box-orient: vertical !important;
    -webkit-line-clamp: 6 !important;
    text-overflow: ellipsis !important;
    white-space: normal !important;
}

.books-download {
    background: white;
    margin-top: 50px;
    height: 150px;
    margin-bottom: 30px;
    display: flex;
    box-shadow: 2px 2px 2px 2px #ccc;
    overflow-y: auto;
    overflow-x: hidden;
}

/*下方列表样式*/

.btab_head {
    height: 50px;
    font-size: 18px;
    color: black;
    border-radius: 10px;
}

.btab_head_div {
    height: 40px;
    line-height: 25px;
    text-align: left;
    margin-top: 10px;
    padding-left: 25px;
    border-radius: 10px;
}

.btab_head .current a {
    border-bottom: #1487f4 solid 2px;
    padding-bottom: 13px;
    font-weight: bold;
    color: #1487f4 !important;
    cursor: pointer;
}

.btab_head_div_r {
    border-right: none;
}

.btab_con {
    width: 100%;
}

.btab_con .current {
    display: block;
}

.btab_con .current {
    display: block;
}

.books-list-tab {
    margin-bottom: 50px;
}

.books-list-tab li {
    list-style: none;
    padding: 5px;
}

.books-list-tab li a {
    color: black;
    margin-top: 10px;
    padding-top: 1px;
    font-size: 16px;
    text-decoration: none;
    word-break: break-all;
    overflow: hidden !important;
    display: -webkit-box !important;
    -webkit-box-orient: vertical !important;
    -webkit-line-clamp: 1 !important;
    white-space: normal !important;
    text-overflow: ellipsis;
}

.books-list-tab li span {
    font-size: 14px;
    color: #888;
}


/*右侧*/
.r-line-books-d a {
    position: absolute;
    margin-left: 85px;
    margin-top: -10px;
    color: black;
    background: white;
    padding-left: 10px;
    padding-right: 10px;
}

#right-b {
    margin-top: 30px;
    padding: 20px;
}

.r-line-books-d {
    background: #1487f4;
    height: 4px;
}

.right-p {
    width: 22%;
    float: right;
    margin-top: -10px;
    margin-left: 20px;
    margin-bottom: 80px;
}


.right-card img {
    border: #eee solid 2px;
    width: 100%;
    height: 190px;
}

.right-connect {
    display: flex;
    list-style: none;
    margin: 15px auto;
}

.right-connect img {
    height: 50px;
    width: 50px;
    object-fit: contain;
}


.tip {
    display: inline-block;
    margin-left: -10px;
    margin-right: -30px;
}


.tip:hover .tiptext {
    visibility: visible;
}

.tip .tiptext {
    width: 240px;
    padding-left: 5px !important;
    text-align: left;
    margin-top: 50px;
    margin-left: -130px;
    visibility: hidden;
    background: #1487f4db;
    color: #fff;
    padding: 5px 0;
    border-radius: 6px;
    position: absolute;
    z-index: 1;
}


.right-connect {
    display: flex;
    list-style: none;
    margin: 15px auto;
}

.right-connect img {
    height: 50px;
    width: 50px;
    object-fit: contain;
}


/*右下方列表*/
.b-list-tab {
    margin-left: -25px;
}


.b-list-tab li {
    border-bottom: lightgrey dashed 1px;
    line-height: 30px;
}

.b-list-tab li img {
    height: 140px;
    width: 80%;
    margin: 0 auto;
    object-fit: cover;
    border: lightgrey solid 1px;
}


.b-list-tab li a {
    color: black;
    margin-top: 10px;
    margin-bottom: 5px;
    font-size: 16px;
    text-decoration: none;
    word-break: break-all;
    overflow: hidden !important;
    display: -webkit-box !important;
    -webkit-box-orient: vertical !important;
    -webkit-line-clamp: 1 !important;
    white-space: normal !important;
    text-overflow: ellipsis;
}

.b-list-tab li span {
    font-size: 14px;
    color: #888;
}


.booktab_head {
    height: 50px;
    font-size: 18px;
    color: black;
    border-radius: 10px;
}

.booktab_head_div {
    height: 40px;
    line-height: 25px;
    text-align: left;
    margin-top: 10px;
    padding-left: 25px;
    border-radius: 10px;
}

.booktab_head .current a {
    border-bottom: #1487f4 solid 2px;
    padding-bottom: 13px;
    font-weight: bold;
    color: #1487f4 !important;
    cursor: pointer;
}

.booktab_head_div_r {
    border-right: none;
}

.booktab_con {
    width: 100%;
}

.booktab_con .current {
    display: block;
}

.booktab_con .current {
    display: block;
}

/*右侧联系方式*/

.dropbtn {
    border: lightgrey solid 1px !important;
    color: black;
    padding: 16px;
    margin-left: 20px;
    font-size: 16px;
    cursor: pointer;
    display: grid;
    border-radius: 50%;
    position: relative;
    left: 20px;
}

.dropdown1, .dropdown2, .dropdown3 {
    float: right;
    position: fixed;
    display: inline-block;
    top: 28%;
    right: 20px;
}

.dropdown-content {
    display: none;
    position: absolute;
    top: -5px;
    right: 80px;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

#Phone {
    height: 100px;
    width: 230px;
    padding-top: 10px;
    padding-left: 15px;
    font-size: 18px;
}

#wxImg {
    height: 190px;
    width: 230px;
}

#wxImg img {
    height: 85px;
    width: 100%;
    margin-top: 7px;
}

#qqNo {
    height: 100px;
    width: 230px;
}

#qqNo p {
    display: grid;
    padding-left: 40px;
    font-size: 18px;
}

#qqNo p span {
    margin-top: 10px;
}

.dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: #f1f1f1;
}

.dropdown1:hover .dropdown-content {
    display: block;
}

.dropdown2:hover .dropdown-content {
    display: block;
}

.dropdown3:hover .dropdown-content {
    display: block;
}

.dropdown1:hover .dropbtn {
    background-color: #FFB300;
    color: white;
}

.dropdown2:hover .dropbtn {
    background-color: limegreen;
    color: white;
}

.dropdown3:hover .dropbtn {
    background-color: dodgerblue;
    color: white;
}

.dropbtn i:hover {
    color: white !important;
}

@media screen and (max-width: 768px) {
    #right-b {
        display: none;
    }

    #detail-books {
        display: block !important;
    }

    .bt-img img {
        margin: 20px 10px !important;
    }
}