.fixed_left_bar {
    position: fixed;
}
.plant_btns {
    margin: 78px 0 0 30px;
    width: 315px;
    
}
.plant_btns div {
    width: 200px;
    height: 50px;
    margin-bottom: 25px;
    overflow: hidden;
}
.plant_btns div a {
    display: block;
    width: 100%;
    height: 100%;
    font-size: 20px;
    text-align: center;
    line-height: 50px;
    -webkit-border-radius: 3px;
    border-radius: 3px;
}
.plant_btns a.active {
    color: #fff;
    background-color: #b81c25;
}
.plant_btns a:not(.active):hover {
    color: #b81c25;
}



/* 中间部分 */
.plant_content {
    margin-top: 50px;
    width: 850px;
    float: right;
}
.detail_box {

}
.detail_box h2 {
    text-align: center;
    margin-bottom: 40px;
}
.detail_img {
    max-height: 650px;
    max-width: 850px;
    text-align: center;
    margin: auto;
    margin-bottom: 60px;
}
.detail_img img {
    max-height: 650px;
    max-width: 850px;
    /* max-width: 100%; */
}
.detail_box p {
    font-size: 18px;
    line-height: 30px;
    text-indent: 2rem;
}



/* 右侧列表 */
.plant_list {
    margin-top: 78px;
}
.plant_list li {
    margin-bottom: 20px;
}