css 浮动动画效果

 箭头从上向下浮动

    
    

        
技术支持
        

            
        
    

 css代码

.top{
    .container {
        position: absolute;
        top: 25%;
        left: 0;

        .icon{
            width: 3.3125rem;
            height: 3.3125rem;
            line-height: 3.3125rem;
            .bgc;
            border-radius: 50%;
            text-align: center;
            overflow: hidden;

            .icon-xiajiantou{
                font-size: 1.375rem;
                .cb;
                display: inline-block;