.slider .ctrl .ctrl-i img{
                    width: 100%;
                    position: absolute;
                    left: 0;
                    bottom: 50px;
                    z-index: 1;
                    /*透明度属性！！！*/
                    opacity:0;
                    -webkit-transition:all .2s;
                }
                /*hover 到控制按钮的样式*/
                .slider .ctrl .ctrl-i:hover{
                    background-color: #f0f0f0;
                }
                .slider .ctrl .ctrl-i:hover img{
                    bottom: 13px;
                    
                    /*缩略图倒影*/
                    -webkit-box-reflect:below 0px -webkit-gradient(
                        linear,
                        left top,
                        left bottom,
                        from( transparent ),
                        color-stop( 50%, transparent),
                        to( rgba(255,255,255,.3))
                    );
                    opacity: 1;
                    
                }