.books_activeImage{display:flex;height:80px;justify-content:center;overflow:visible;position:relative;top:-15px;width:100%;z-index:10}.books_activeImage .maxExamActive{height:80px;max-width:1920px;position:relative;width:1920px}.hidden_books_activeImage{height:80px;margin-top:-15px;position:relative;width:100%}.books_top{display:flex;justify-content:space-between;margin-bottom:16px}.books_top .books_activeImage{display:flex;height:80px;justify-content:center;margin-bottom:16px;position:relative;width:100%}.books_top .books_activeImage .maxExamActive{height:80px;max-width:1920px;width:100%}.books_top .course_top_left{align-items:center;display:flex;flex:1}.books_top .course_top_left .jpkc_text{color:#222;font-size:24px;font-weight:600}.books_top .course_top_left .course_changetab{align-items:center;display:flex;flex:1;overflow-x:auto}.books_top .course_top_left .course_changetab .tabitem{color:#222;cursor:pointer;flex-shrink:0;font-size:16px;font-weight:400;margin-left:48px}.books_top .course_top_left .course_changetab .active_tabtext{color:#36f}.books_top .course_top_right{align-items:center;color:#222;cursor:pointer;display:flex;font-size:16px;font-weight:400;position:relative}.books_top .course_top_right .changesub_icon{height:12px;margin-left:4px;width:12px}.books_top .course_top_right .changesub_droppanel_outer{background:#fff;border:1px solid #eee;border-radius:8px;box-shadow:0 4px 16px rgba(207,207,207,.25);display:none;max-height:200px;overflow:auto;overflow-x:hidden;padding:12px 20px;position:absolute;right:50%;top:34px;transform:translate(50%);width:150px;z-index:2}.books_top .course_top_right .changesub_droppanel_outer .subject_item{color:#222;display:block;font-size:16px;line-height:20px;padding:16px 0}.books_top .course_top_right:hover .changesub_droppanel_outer{display:block}.course_center{min-height:400px}.kcjs_content_empty{align-items:center;display:flex;flex-direction:column;justify-content:center;min-height:400px}.kcjs_content_empty .kcjs_empty_icon{height:120px;width:120px}.kcjs_content_empty .kcjs_empty_text{color:#bbbaba;font-size:16px;margin-top:10px}.course_footer{display:flex;justify-content:center;margin-bottom:48px;margin-top:28px}