html {
  -moz-box-sizing: border-box;
       box-sizing: border-box;
}
a,a:hover{color:#FFF;text-decoration:none}

*, *:before, *:after {
  -moz-box-sizing: border-box;
       box-sizing: border-box;
}

body {
  margin: 0;
	font-family: "微软雅黑", Arial;
  font-size: 16px;
  line-height: 64;
  z-index:9999;
}

nav ul {
  list-style: none;
  padding-left: 0;
  margin-top: 0;
  margin-bottom: 0;
}

h1 {
  width: 1300px;
  margin: 100px auto 20px;
  color: #f0f0f0;
  text-align: center;
  z-index:9999;
}

.nav {
  width: 1300px;
  margin: 0 auto;
  background: #004E98;
  color: #f0f0f0;
}
.nav a {
  display: block;
  padding: 0 16px;
  line-height: inherit;
  cursor: pointer;
}
.nav_menu {
  line-height: 44px;
  font-weight: 700;
  text-transform: uppercase;
}
.nav_menu-item {
  font-family: "微软雅黑", Arial;
  font-size: 18px;
  width: 170px;
  line-height: 64px;
  display: inline-block;
  position: relative;
  z-index:9999;
  float:left;
  left:0px;
}
.nav_menu-item:hover {
  background-color: #2672C0;
}
.nav_menu-item:hover .nav_submenu {
  display: block;
}
.nav_submenu {
  font-weight: 300;
  text-transform: none;
  display: none;
  position: absolute;
  width: 170px;
  background-color: #2672C0;
  z-index:9999;
  left:0;
  filter:alpha(Opacity=80);-moz-opacity:0.8;opacity: 0.8 
}
.nav_submenu-item:hover {
  background: rgba(0, 0, 0, 0.1);
}