.back_number{
width:750px;
text-align:right;
margin:10px;
font-size:80%
}

.museum_tit{
width:800px;
background:url(tit_museum.gif);
text-align:right;
height:70px;
padding:5px 0 0 0}


.article_l{width:320px;
border:double 3px #663300;
padding: 15px;
margin-bottom:15px;
font-size:100%;
float:left;
margin-left:10px

}

.article_r{width:320px;
border:double 3px #663300;
padding: 15px;
margin-bottom:15px;
font-size:100%;
float:right;
margin-right:10px
}


#m_main{
width:780px;
margin:6px auto;

}

.line{
border:#663300 dashed 1px;
margin:10px 0 10px 0
}
.m_tit{
font-size:90%;
font-weight:bold;
text-align:left;
color:#009900;
}

.m_name{
font-size:85%;
font-weight:bold;
text-align:right;
color:#009900;
}

.m_img{
margin-top:15px;
text-align:center
}

.m_detail{
font-size:78%;
line-height:140%;
text-align:left;
margin-top:5px
}

.material{
font-size:78%;
line-height:140%;
text-align:left;
margin-top:5px;
color:#0066CC}

.top{
font-size:78%;
margin:10px 0;
width:750px;
text-align:right;
}