#side_nav {
    position: fixed;
    bottom: 150px;
    margin-top: -140px;
    right: 0;
    z-index: 10;
}

#side_nav ul {
    background-color: #868686;
}

#side_nav li {
    border-bottom: 1px solid #fff;
    padding: 4px;
    cursor: pointer;
    position: relative;
    font-size: 12px;
    text-align: center;
    color: #fff;
}

#side_nav li:last-child{
    border-bottom: 0;
}

#book {
    position: fixed;
    bottom: 20px;
    margin-top: -140px;
    right: 10px;
    z-index: 10;
    text-align: center;
    cursor: pointer;
    font-size: 13px;
    
}

#book img {
    /*width: 35px;*/
    height: 40px;
}

#book div {
    /*padding: 2px 6px;*/
    margin-top: 5px;
    width:80px;
    height: 24px;
    line-height: 24px;
}

.side_icon {
    margin-bottom: -2px;
}

.side_icon img {
    width: 32px;
    height: 32px;
}

#returnTop {
    display: none;
}

.side_box {
    bottom: 0;
    right: 56px;
    color: white;
    display: none;
    text-align: center;
    position: absolute;
    padding: 0px;
    width: 120px;
    font-size: 16px;
/*    max-height: 56px;
    height: 54px;*/
    line-height: 54px;
    /*background-color: #fff;*/
    /*box-shadow: 0 4px 12px 0 rgba(7, 17, 27, 0.1);*/
}

.side_box:before {
/*    content: "";
    right: -10px;
    bottom: 20px;
    position: absolute;
    border-style: dashed dashed dashed solid;
    border-color: transparent transparent transparent #fff;
    border-width: 5px;
    width: 0;
    height: 0;*/
}

.side_box img {
    width: 120px;
    height: 120px;
}

.book_modal {
    display: none;
    position: fixed;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    top: 0;
    z-index: 120;
}

.book_box {
    position: fixed;
    top: 15%;
    width: 600px;
    right: 50%;
    margin-right: -300px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 4px 12px 0 rgba(7, 17, 27, 0.1);
}

.book_box h4 {
    position: relative;
    text-align: center;
    font-size: 20px;
    font-weight: normal;
    margin: 0;
    padding: 25px 0;
    letter-spacing: 1px;
    border-bottom: 1px solid #eeeeee;
}

.close {
    position: absolute;
    right: 15px;
    top: 5px;
    color: #9fa1a4;
    cursor: pointer;
    font-size: 28px;
}

.close:hover {
    color: #000;
}

.book_body {
    font-size: 15px;
    width: 520px;
    margin: 0 auto;
    padding: 30px 20px;
}

.book_body div {
    margin-bottom: 30px;
}

.book_body div:last-child {
    margin-bottom: 0;
}

.book_body label {
    float: left;
    margin-right: 15px;
    width: 140px;
    text-align: right;
    margin-top: 7px;
}

.book_body input {
    border: 1px solid #ccc;
    outline: none;
    padding: 6px 12px;
    font-size: 15px;
    width: 260px;
    font-family: "微软雅黑";
}

.book_body textarea {
    resize: none;
    outline: none;
    font-size: 15px;
    border: 1px solid #ccc;
    padding: 6px 12px;
    width: 260px;
    height: 120px;
    font-family: "微软雅黑";
}

.book_foot {
    padding: 30px;
    border-top: 1px solid #eeeeee;
    text-align: center;
}

.book_foot span {
    font-size: 15px;
    display: inline-block;
    width: 180px;
    line-height: 40px;
    text-align: center;
    border-radius: 4px;
    cursor: pointer;
}