.product_introduction{
 clear: both;
}

.title_category_a{
 width:1000px;
 height:30px;
 background-color:#333333;
 color:#FFFFFF;
 padding:5px 0 10px 0;
 margin:10px 0 20px 0;
 font-size: 1.8em;
}

.title_b{
 background-color:#ffffff;
 color:#666666;
 padding:5px 0 5px 0px;
 font-size:16px;
 text-align:left;
}

.photo_pro{
 width:510px;
 height:680px;
 float:left; 
}

.detail_pro{
 width:450px;
 float:left;
 text-align:left;
 padding:0px 20px 0px 20px; 
}

div#photo_etc {
width: 1000px;
overflow: hidden;
}
#photo_etc ul {
width: 1050px;
}

#photo_etc ul:after {
display: block;
clear: both;
content: "";
}

#photo_etc ul li  {
margin: 33px 50px 33px 0;
float: left;
}

.exline{
 background-image:url(https://img13.shop-pro.jp/PA01070/218/etc/line_dot2.gif?cmsp_timestamp=20181109180740);
 background-repeat:repeat-x;
 width:100%;
 margin-top:20px;
 height:2px;
 margin-bottom:2px;
}

.submit_btn{
    border: 0px;
    width:200px;
    height:40px;
    background: url(https://img13.shop-pro.jp/PA01070/218/etc/btn_cart.png?cmsp_timestamp=20190622172757) left top no-repeat;
}
 
.submit_btn:hover{
    opacity:0.5;
}