相关疑难解决方法(0)

body {
  background: #FFFFFF;
  color: #FFFFFF;
  margin: 0px;
  padding: 0px;
  height: 100%;
}
.clear {
  clear: both;
}
.page-wrap {
  width: 980px;
  margin: 0px auto;
  height: 100%;
}
#main-menu {
  background: white;
  height: 55px;
  width: 100%;
  padding: 0px;
  margin: 0px;
  border-bottom: 1px solid black;
}
ul {
  font-family: Arial, Verdana;
  font-size: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}
ul li {
  display: block;
  position: relative;
  float: left;
}
li ul {
  display: none; …