.box-174-1   {
width:970px;
height:auto;
overflow:hidden;
padding-top:20px;
border-bottom-width:1px;
border-bottom-style:dotted;
border-bottom-color:#bbbbbb;
}
.box-174-6   {
float:left;
width:640px;
height:270px;
margin-right:10px;
}
.box-174-8   {
float:left;
width:319px;
height:280px;
border-left-width:1px;
border-left-style:dotted;
border-left-color:#bbbbbb;
}