/* 导航开始 */
#nav{
  width:100%;
  border-bottom: 4px solid #C5D0DE;
}
nav {
  width: 1200px;
  margin: 0 auto;
}

nav ul {
  display: flex;
}

nav ul li {
  width: 200px;
  height: 48px;
  line-height: 48px;
  text-align: center;
  font-size: 20px;
  font-weight: bold;
}
nav ul li a{
  display: block;
  width: 200px;
  height: 24px;
  line-height: 24px;
  border-right: 2px solid #333;
  margin-top: 12px;
color:#333;
}
nav ul li span {
  font-weight: bold;
}
.on{
  display: block;
  width: 120px;
  height: 36px;
  margin: 0 auto;
  border-bottom: 4px solid #0066C4;
}
nav ul li .border {
  border-right: none;
}

/* 导航结束 */