.left_box{background-color:#fff;position:relative;z-index:99;height:calc(100vh - 120px)}.left_box .fold_btn{position:absolute;right:-40px;top:50%;height:100px;width:40px;background-color:#fff;-webkit-box-shadow:3px 3px 3px 3px rgba(0,0,0,.1);box-shadow:3px 3px 3px 3px rgba(0,0,0,.1);border-top-right-radius:5px;border-bottom-right-radius:5px;cursor:pointer;margin-top:-50px;text-align:center}.left_box .fold_btn i{font-size:18px;line-height:100px}.left_box .icon-title_one,.left_box .icon-title_three{font-size:18px;width:100px;height:64px;text-align:center}.left_box .icon-title_two{font-size:18px;width:80px;height:64px;text-align:center}.left_box .el-tabs__nav-wrap{background:#e4e7ed}