*{
    margin: 0;
    padding: 0;
}
li{
    list-style: none;
}
a{
    display: inline-block;
    text-decoration: none;
    -webkit-tap-highlight-color:transparent;
}
img{
    vertical-align: inherit!important;
}
body{
    width: 100%;
    font-size:15px;
    color: #333;
    background-color: #fff;
}
.page_container{
    width: 100%;
    max-width: 750px;
    padding-bottom: 50px;
    margin: 0 auto;
    letter-spacing: 1px;
    background-color: #d3e7ff;
}

/*header*/
.header{
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2;
    width: 90%;
    max-width: 750px;
    height: 50px;
    line-height: 50px;
    font-size: 18px;
    font-weight: bold;
    padding: 0 5%;
    background-color: #fff;
}
.back{
    float: left;
    width: 10%;
}
.back img{
    position: relative;
    top: 5px;
    width: 12px;
}
.h_title{
    float: left;
    width:80%;
    font-weight: bold;
    text-align: center;
}
.login_out{
    float: left;
    width: 10%;
    height: 50px;
    line-height: 50px;
    color: #fff;
    text-align:right;
}
.login_out a{
    color: #fff;
    font-size: 14px;
}
.index{
    float: left;
    width: 10%;
    text-align: right;
}
.index img{
    position: relative;
    top: 5px;
    width: 21px;
}

.nav_list{
    position: fixed;
    top: 0;
    left: 0;
    z-index: 3;
    width: 100%;
    max-width: 750px;
    height: 50px;
    line-height: 50px;
    padding: 0;
    background-color: #4e5999;
}
@media screen and (min-width: 750px) {
    .nav_list{
        left: calc((100% - 750px) / 2);
    }
}
.nav_list ul li{
    float: left;
    width: 14.28%;
    text-align: center;
}
.nav_list ul li a{
    display: inline-block;
    width: 100%;
    color: #fff;
}

.center{
    width: 100%;
    height: calc(100vh - 130px);
    overflow-y: auto;
    margin-top: 50px;
}


.foot{
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 2;
    width: 100%;
    max-width: 750px;
    /*height: 50px;*/
    color: #fff;
    text-align: center;
    line-height: 50px;
    font-size: 13px;
    background-color: #282828;
}


@media screen and (min-width: 750px) {
    .header{
        left: calc((100% - 750px) / 2);
    }
    .foot{
        left: calc((100% - 750px) / 2);
    }
}
/*اه³‎¸،¶¯*/
.clearfix:after{
    content:".";
    display:block;
    height:0;
    visibility:hidden;
    clear:both;
}
.clearfix{
    zoom:1;
}