.air-slider{position:relative; margin: 0 auto;background-size: 100% 100%;}
.air-slider .slide{
    width:100%;
    height:auto;
    position:absolute;
    overflow:hidden;
    opacity:0;
    -webkit-transition:1s ease-in-out all;
    transition:1s ease-in-out all;
	

}
.air-slider .slide img{height:auto}
.air-slider .active-slide{opacity:1}
.air-slider .controls{
    width:100%;
    height:auto;
    top:calc(50% - 25px);
    left:0;
    display:-webkit-box;
    display:-webkit-flex;
    display:-ms-flexbox;display:flex;
    -webkit-flex-flow:row nowrap;
    -ms-flex-flow:row nowrap;
    flex-flow:row nowrap;
    -webkit-box-pack:justify;
    -webkit-justify-content:space-between;
    -ms-flex-pack:justify;
    justify-content:space-between;
    position:absolute;
        
}.air-slider .controls button{
        width: 16px;
    height: 56px;
  

    border:none;
    outline:none;
    cursor:pointer;
    font-weight:bold;

}


#prev{
	z-index: 100;
    background-image: url("../css/img/btntrai.png");
    background-color: transparent;
       margin-left: 42px;
		
	 
}
#next{
    background-image: url("../css/img/btnphai.png");
      background-color: transparent;
	      margin-right: 42px;
		  z-index: 100;
		  
}