body{
	background-color: #eee;
}
.tutorial_wrapper{

	margin: 0px auto;
	padding: 20px;
	box-sizing: border-box;
	width: 640px;	
/*	height: 500px;*/
	border:#ddd solid 0px;
	color:#666;
	background-color: #fff;
	border-radius: 10px;
}

.tutorial_wrapper .title{
	font-size: 16px;
	font-weight: bold;
	text-align: center;
	padding: 20px;
	box-sizing: border-box;
} 

.tutorial_wrapper .diagram_wrapper{
	width: 100%;	
	text-align: center;
}

.tutorial_wrapper .diagram_wrapper img{	
	display: inline-block;
	width: 60%;
	padding: 20px 0px;
	box-sizing: border-box;
}


.tutorial_wrapper .operating_steps{
	width: 100%;	
}

.tutorial_wrapper .operating_steps .description{
	font-size: 14px;
/*	font-weight: bold;*/
	text-align: left;
	width: 100%;	
	padding: 20px;
	box-sizing: border-box;
}


.tutorial_wrapper .operating_steps .image_wrapper{
	padding: 20px 0px;
	width: 100%;
	display: inline-block;
	text-align: center;
	box-sizing: border-box;
}

.tutorial_wrapper .operating_steps  .image{
	display: inline-block;	
	width: 500px;
}

.tutorial_wrapper .operating_steps ul {
	width: 100%;
	box-sizing: border-box;
    margin: 0px;
    padding: 0px 0px 0px 40px;
    box-sizing: border-box;
    list-style-type: disc;
}

.tutorial_wrapper .operating_steps ul li {
    display: list-item;
    text-align: -webkit-match-parent;
    unicode-bidi: isolate;
    list-style: inside;
    list-style-position: outside;
    line-height: 30px;    
    font-size: 14px;
}

.tutorial_wrapper .operating_steps ul li::marker {
    color: #0099A8;
}

.tutorial_wrapper .start_wrapper{
	width: 100%;
	padding: 20px;
	box-sizing: border-box;
	text-align: center;
}

.tutorial_wrapper .start_wrapper .start_btn {
    background-color: #0099A8;
    padding: 5px 8px;
    font-size: 14px;
    color: #fff;
    cursor: pointer;
    display: inline-block;
    font-weight: bold;
    border-radius: 10px;
}