.menu-item-icon{display:inline-block;width:24px;font-size:18px;text-align:center;margin-right:5px}.demonstration{display:block;padding:0 16px;color:#1682e6;font-weight:900;font-size:16px;text-align:center;margin-top:10px}.margin-bottom{margin-bottom:20px}.align-end{text-align:end}.course-bg-box{height:810px;background-color:#fff}.course-box{padding:10px;margin-bottom:50px}.el-image{border:none}.text-align{background:rgba(0,0,0,.5);color:#fff;font-size:24px;text-align:center;line-height:2}.bg-purple{width:100%;height:100%;opacity:.3;background-color:#ccc;background-size:100% 100%;background-repeat:no-repeat}.grid-content{position:relative;border-radius:4px;height:200px}