html,
body {
  position: relative;
  width: 100%;
  height: auto;
  font-size: 16px;
  font-family: "Microsoft YaHei";
}
/*版心*/
.w1200 {
  width: 1200px;
  margin: 0 auto;
}
/*头部*/
header {
  width: 100%;
  height: 80px;
  background-color: #fff;
}
header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}
header nav .nav-rg {
  display: flex;
  height: 100%;
}
header nav .nav-rg li {
  height: 100%;
}
header nav .nav-rg li:hover a {
  color: #ffffff;
  background-color: #2678ed;
}
header nav .nav-rg li a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 106px;
  height: 100%;
  color: #333333;
  font-size: 16px;
  transition: all 0.2s;
}
header nav .nav-rg .nav_active a {
  color: #ffffff;
  background-color: #2678ed;
}
/*banner*/
.banner {
  width: 100%;
}
.banner img {
  width: 100%;
  height: 100%;
}
/*内容*/
article {
  background: url(../images/bg.jpg) no-repeat center top #e5f4fe;
  background-size: 100%;
}
article .content {
  padding-top: 73px;
  padding-bottom: 98px;
}
article .content .title {
  margin: 0 auto;
  width: 390px;
  height: 63px;
  color: #ffffff;
  font-size: 40px;
  text-align: center;
  line-height: 63px;
  background: url(../images/title.png) no-repeat;
}
footer {
  width: 100%;
  height: 50px;
  color: #fff;
  font-size: 14px;
  line-height: 50px;
  text-align: center;
  background-color: #77a3dd;
}