* {   margin: 0;   padding: 0; }   
#igs {   
	min-width：1200px;
	height: 350px;
	position: relative; 
	overflow: hidden;
	}   
.ig {   
	position: absolute; 
	}   
#tabs {   
	position: absolute;   
	list-style: none;   
	background-color: rgba(255,255,255,.5);   
	right: 400px;  
	bottom: 10px;   
	border-radius: 10px;   
	padding: 10px 0 10px 10px; 
	 }   
.tab{   
	float: left;   
	text-align: center;   
	line-height: 20px;  
	width: 20px;   
	height: 20px;   
	cursor: pointer;   
	overflow: hidden;   
	margin-right: 4px;   
	border-radius: 100%;   
	background-color: rgb(255,255,255).3} 
.tab:hover{
	background-color: #07B529;
}  
.btn{   
	position: absolute;  
		color: #fff;   
	 	top: 120px;   
	 	width: 30px;  
	  	height: 80px;  
	   background-color: rgba(255,255,255,.3);   
	   font-size: 40px;   
	   font-weight: bold;   
	   text-align: center;   
	   line-height: 80px;  
	   border-radius: 5px;   
	   margin: 0 5px; 
	    }   
.btn2{  
	 position: absolute;   
	 right: 350px; 
	 } 
.btn1{  
	 position: absolute;   
	 left: 350px; 
	 }     
.btn:hover{   
	background-color: #07B529;
	 	 }