.tree_nav { z-index: 1; position: relative; width: 230px; height: 55px; padding: 0px; background: #f2f2f2; border-bottom: 1px solid #dddddd; }
.tree_nav .trail { width: 223px; }
.tree ul.ul_tree { margin: 0px 0 0 0; }
.tree ul li { width: 230px; }
.tree ul li:hover { width: 230px; }
.tree ul li .file { width: 205px; }