#backnumber {
width: 670px;
_width: 570px;
border: 1px none #5CB7E5;
margin-bottom: 15px;
font-family: "ＭＳ ゴシック", arial, helvetica, clean, sans-serif;
}
#backnumber h2 {
font-weight: bold;
color: #FFFFFF;
background-color: #5CB7E5;
padding: 5px;
margin-bottom: 10px;
}
#backnumber #mailContent h3 {
background-color: #CCCCCC;
padding: 5px;
font-weight: normal;
margin-bottom: 10px;
}
#backnumber #mailContent {
padding: 10px;
border: 1px solid #CCCCCC;
}
#backnumber .down , #backnumber .up {
margin-top: 10px;
font-weight: bold;
}
#backnumber .more {
margin-top: 10px;
}
#backnumber #mailContent {
font-size: 93%;
}