img{
	display:block;

	width:100%;
	height:100%;
	overflow: contain;
	padding-top: 75%;
}

#div_root{
	margin:auto;
	width:100%;
	height:100%;
}
#div_top{
	width:100%;
	height:45px;
	background-color:aliceblue;
	text-align:center;
}
#div_slit{
	width:5%;
	height:100%;
	float:left;
	-ms-transform: translateY(50%);
	transform: translateY(50%);
	background-color:red;
}
#div_left{
	width:50%;
	height:100%;
	/*background-color:red;*/
	float:left;
}
#div_mid{
	width:33%;
	height:50%;
	/*background-color:green;*/
	float:left;
}
#div_right{
	width:40%;
	height:100%;
	/*background-color:blue;*/
	float:left;
}
#div_bottom{
	width:50%;
	height:100px;
	background-color:beige;
	float:left;
}
#div_bottom2{
	width:50%;
	height:100px;
	background-color:bisque;
	float:left;
}