.nav_main {
  width: 100%; /* 固定宽度 */
  height: 50px;
  background: #282828;
  position: static;  /* 移除绝对定位 */
  transform: none;   /* 清除位移 */
  left: auto;
}
.nav .list {
  width: 100%;
  height: 100%; /* 继承父容器高度 */
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #282828;
}
.nav_main .nav {
  width: 1200px;
  margin: 0 auto
}
.nav_main .nav li {
  float: left;
 width: 165px;
	/*padding:0 32px;*/
  height: 50px;
  line-height: 50px;
  display: block;
  position: relative;
  z-index: 10;
  font-size: 14px;
 /* border-right: 1px solid #4091ff;*/
  text-align: center;
	background: url(../images/nav_bor.gif) no-repeat right 18px;
	
	margin-left:-1px;
}
.nav_main .nav li:first-child {
 /* border-left: 1px solid #4091ff;
  background: 0*/
}
.nav_main .nav li a {
  display: block;
  color: #fff;
  font-size: 18px
	  
}
.nav_main .nav li a:hover, .nav_main .nav li a.hover, .nav_main .nav li.hover {
  background: #4091ff
}
.nav_main .nav dl {
  width: 100%;
  position: absolute;
  left: 0;
  top: 50px;
  z-index: 12;
 /* border: 1px solid #4091ff;*/
  border-top: 0
}
.nav_main .nav dl {
  position: absolute;
  filter: progid:DXImageTransform.Microsoft.Shadow(color=#4c91c0, direction=120, strength=5);
  opacity: 0;
  visibility: hidden;
  transition: all .6s ease 0s;
  transform: translate3d(0, 10px, 0);
  -moz-transform: translate3d(0, 10px, 0);
  -webkit-transform: translate3d(0, 10px, 0)
}
.nav_main .nav li:hover dl {
  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0);
  -moz-transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0)
}
.nav_main .nav dl dd {
  line-height: 32px;
  /*height: 32px;*/
  text-align: left;
  position: relative;
  z-index: 12;
  display: block;
  width: 100%;
/*  border-top: 1px solid #4091ff*/
}
.nav_main .nav dl dd:first-child {
  border: 0
}
.nav_main .nav dl dd a {
  color: #fff;
  font-size: 14px;
  padding: 0;
  width: 100%;
  background: #282828;
  text-align: center
}