新手，求帮助

CSS code

.page_leftbox{    background-color: #f7f7f7;    background-image: url(images/page_box.gif);    background-repeat: repeat-x;    background-position: bottom;    width: 236px;    height: 217px;    margin-top: 5px;    margin-right: 0px;    margin-bottom: 0px;    margin-left: 0px;}.page_leftbox li{    line-height: 23px;    margin: 10px;    text-align: center;    border-bottom-width: 1px;    border-bottom-style: dashed;    border-bottom-color: #1d7cb6;    list-style-type: none;    color: #a60000;}

这两个是不是有什么联系

[解决办法]
page_leftbox这是父，page_leftbox li 这是子，子继承父的
[解决办法]
http://www.w3school.com.cn/css/css_syntax_class_selector.asp里讲的很明白