/*菜单栏开始*/
#nav{ margin:0 15px; margin-top:5px; display:flex; flex-flow:wrap; }	
#nav a:nth-child(2n+1){ margin-right:7px;}
#nav a:nth-child(2n){ margin-left:7px;}
#nav a{ display:inline-block; flex:none; width:calc(100%/2 - 7px); justify-content:space-between; margin-top:15px; text-align:center; font-size:14px; line-height:35px; color:#181817; background-color:#eeeff2; border-radius:4px;}
#nav .a_on{ color:#fff; background-color:#ed434c;}
.tit b{ font-size:20px;color:#1a1a1a;}
.tit p{ font-size:16px; text-align:left; color:#333; line-height:200%;}


/*关于我们*/
h2{ margin:0 auto; margin-right:15px; margin-top:30px; margin-bottom:30px; font-size:18px; font-weight:bold; line-height:18px; color:#1a1a1a;}
h2:before { float: left; content: ''; width: 12px; height: 20px; margin-right: 12px; background-color:#1297a4; border-radius: 0 2px 2px 0;}


/*产品*/
#nr{ margin:0 15px; margin-left:30px; margin-bottom:20px; flex-flow:wrap;}
#nr a{ line-height:300%;}