* {
  margin: 0;
  padding: 0;
  font-family: "Microsoft YaHei", 微软雅黑;
}

a {
  text-decoration: none;
  color: #000;
}

li {
  list-style-type: none;
}

p {
  text-indent: 2em;
}

.main {
  background-color: #ecf7fc;
}

.wrapper {
  width: 1028px;
  margin: 0 auto;
  margin-top: 29px;
  background-color: #fff;
  box-shadow: 0px 0px 18px rgb(29 54 136 / 60%);
  border-radius: 10px;
}

.header-wrapper {
  position: relative;
  height: 100px;
  background-color: #1d3688;
  border-bottom: 1px solid #b6bfd9;
  border-radius: 10px 10px 0 0;
}

header {
  position: absolute;
  width: 928px;
  height: 65px;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}

.ecnu-logo {
  display: inline-block;
  height: 60px;
  vertical-align: middle;
}

.verticle-line {
  display: inline-block;
  border-left: 1px solid #fff;
  margin-left: 15px;
  vertical-align: middle;
  height: 50px;
}

.main-title {
  display: inline-block;
  vertical-align: middle;
  font-size: 32px;
  font-weight: 520;
  color: #fff;
}

.nav-wrapper {
  position: relative;
  height: 43px;
  background-color: #f8f8f8;
  border-radius: 0 0 10px 10px;
  border-bottom: 1px solid #1d3688;
}

.nav-wrapper active {
  height: 43px;
  background-color: #f8f8f8;
  border-radius: 0 0 10px 10px;
  border-bottom: 1px solid #1d3688;
}

.header-nav-active {
  width: 1028px;
  z-index: 2;
}

.fix-div {
  position: fixed;
  top: 0;
}

nav {
  position: absolute;
  width: 1028px;
  height: 43px;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
}

.nav-wrapper ul::after {
  display: block;
  content: "";
  clear: both;
}

.nav-wrapper li {
  float: left;
  width: 202px;
  height: 43px;
  text-align: center;
  border-left: 1px solid #1d3688;
}

.nav-wrapper li:first-child {
  border-left: 0px;
}

.nav-wrapper a {
  color: #444;
  font-size: 21px;
  letter-spacing: 1px;
  margin-top: 4px;
}

.nav-wrapper a:hover {
  color: #dc851f;
}

.item-name:hover {
  color: #dc851f;
}

footer {
  width: 1028px;
  text-align: center;
  margin: 0 auto;
  margin-top: 40px;
  margin-bottom: 50px;
  font-size: 14px;
  color: #616161;
}

.ecnu-home {
  color: #616161;
  cursor: pointer;
}

.ecnu-home:hover {
  color: #dc851f;
}