.tree-item .opt-text{margin-right:5px;font-size:12px;color:#3b8fef}.tree-item .opt-text:first-child{margin-left:10px}.tree-item .button{margin-left:6px;display:inline-block;width:20px;height:20px;line-height:20px;border-radius:4px;text-align:center;cursor:pointer;border:1px solid #ddd}.tree-item .button:hover{border:1px solid #999}