.b1f, .b2f, .b3f, .b4f{font-size:1px; overflow:hidden; display:block;}
.b1f {height:1px; background:#000; margin:0 5px;}
.b2f {height:1px; background:#f5f5f5; border-right:2px solid #000; border-left:2px solid #000; margin:0 3px;}
.b3f {height:1px; background:#f5f5f5; border-right:1px solid #000; border-left:1px solid #000; margin:0 2px;}
.b4f {height:2px; background:#f5f5f5; border-right:1px solid #000; border-left:1px solid #000;margin:0 1px;}
.contentf {background: #f5f5f5;border-right:1px solid #000; border-left:1px solid #000;}
.contentf div {margin-left: 5px; padding:1em 1em 1em 1em;}