body {
    font-size: 15pt;
    background-color: #007f9915;
    text-align: center;
}

*{
  margin: 0;
  padding: 0;
}

a{
  text-decoration: none
} 

.title_img{
  width: 256px;
  height: 53px;
  vertical-align: middle;
}

.title_text{
  font-size: 36px;
  font-weight: 900;
  color: black;
  vertical-align: bottom;
}

#nav{ width:100%; height:40px; background:lightsteelblue;margin:0 auto} 

#nav li{display:inline; height:60px} 

#nav li a{display:inline-block; padding:0 20px; height:40px; line-height:35px;
 color:white; font-size:26px} 
 
#nav li a:hover{background: #2c698d}/*设置鼠标滑过或悬停时变化的背景颜色*/

#nav{
  text-align: center
}

#homepage{
background-color: #2c698d;
}