body{
  width: 100%;
  max-width: 1920px;
  min-width: 1300px;
  font-family: "Microsoft YaHei", "微软雅黑", serif;
  /* background-color: blue; */
  padding-bottom: 40px;
}
a{
  text-decoration: none;
}
input{
  border:0;outline:none;
}
input::-webkit-input-placeholder {
  color: rgb(0, 0, 0);
}
input::-moz-input-placeholder {
  color: rgb(0, 0, 0);
}
input::-ms-input-placeholder {
  color: rgb(0, 0, 0);
}
.margin_auto{
  margin: 0 auto;
}
.por{
  position: relative;
}
.pof{
  position: fixed;
}
.poa{
  position: absolute;
}
.clear{
  clear: both;
}
.left{
  float: left;
}
.right{
  float: right;
}
.no_left{
  margin-left: 0px !important;
}
.none{
  display: none;
}
.block{
  display: block;
}
@media screen and (min-width:1640px){
  .nav .content ul li{
    float: left;
    padding: 0 28px;
  }
  .nav .content{
    width: 1200px;
    height: 100%;
  }
}
@media screen and (max-width:1640px){
  .nav .content ul li{
    float: left;
    padding: 0 10px;
  }
  .nav .content{
    width: 840px;
    height: 100%;
  }
}
/* 导航 */
.nav_if{
  width: 100%;
  min-width: 1300px;
  height: 60px;
  z-index: 99;
  top: 0px;
  left: 0px;
}

.nav{
  width: 100%;
  height: 60px;
  background: url(../img/nav_bg.png) center no-repeat;
}
.nav .logo{
  width: 100px;
  height: 50px;
  background: url(../img/logo.png) center no-repeat;
  left: 35px;
  top: 5px;
}
.nav .logo a{
  display: block;
  width: 100%;
  height: 100%;
}

.nav .content ul{
  width: 100%;
  height: 100%;
}
.nav .content ul li:first-child{
  padding-left: 0px;
}
.nav .content ul li:last-child{
  padding-right: 0px;
}
.nav .content ul li a{
  font-size: 22px;
  line-height: 60px;
  color: #fff;
}
.nav .option{
  width: 200px;
  height: 100%;
  top: 0px;
  right: 60px;
  margin-top: 0px;
  padding-bottom: 0px;
  border-bottom: 0;
}
@media screen and (max-width: 1400px) {
    .nav .content ul li a{
        font-size: 20px
    }
}
.nav .option .man{
  width: 27px;
  height: 27px;
  margin-top: 16px;
  margin-left: 13px;
  background: url(../img/man.png) center no-repeat;
}
.nav .option .man a{
  display: block;
  width: 100%;
  height: 100%;
}
.nav .option .login{
  margin-left: 22px;
  width: auto;  
 padding-top: 0;
}
.nav .option .login a{
  font-size: 18px;
  color: #fff;
  line-height: 60px;
}
.nav .option .list_down{
  display: none;
  width: 150px;
  background: #183589;
  padding: 10px 0px;
}
.nav .option .list_down .option_l a{
  display: block;
  width: 100%;
  font-size: 22px;
  line-height: 33px;
  color: #fff;
  text-align: center;
}
.Listdown:hover .list_down{
  display: block;
}

.more{
  width: 1200px;
  margin-top: 40px;
  font-size: 16px;
  color: #717171;
  line-height: 16px;
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #e5e5e5;
  cursor: pointer;
}
.num_all{
  position: absolute;
  left: 150px;
  font-size: 16px;
  color: #fff;
  line-height: 60px;
}
/* .option_list{
  position: absolute;
  width: 130px;
  top: 0px;
  right: 0px;
}
.option_list ul{
  width: 100%;
}
.option_list ul li{
  width: 100%;
  height: 30px;
  font-size: 22px;
  line-height: 30px;
  text-align: center;
  color: #fff;
} */