body{
    margin:0;
    padding:0;
    overflow:hidden;
}
a {
    text-decoration: none;
    -webkit-backface-visibility: hidden;
    -webkit-tap-highlight-color:transparent;//方法一
}
a:visited {
    color: #0000FF; /*连接访问的颜色变化*/
}
.common_bg{
    height:910px;
    width:1920px;
    background-repeat: no-repeat;
    background-size:cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    position:absolute;
    top:50%;
    left:50%;
    transform:translate(-50%, -50%);
}
#not_found .refresh{
    color:#47effc;
    font-size:16px;
    cursor:pointer;
}
#not_found .back_index{
    display: inline-block;
    width: 118px;
    height: 32px;
    line-height: 32px;
    text-align: center;
    border: solid 1px #568dff;
    color: #568dff;
    font-size: 18px;
    margin-left: 12px;
    border-radius: 6px;
    cursor:pointer;
}
#not_found > div{
    position:absolute;
    top: 222px;
    left: 743px;
}


#bad_request .back_index{
    width:210px;
    height:50px;
    display:inline-block;
    font-size:24px;
    background-color:#fc817e;
    color:#fff;
    border-radius:10px;
    text-align:center;
    line-height:50px;
    position:absolute;
    left: calc(50% - 105px);
    bottom:104px;
    cursor:pointer;
}

#upgrading .back_index{
    width:180px;
    height:53px;
    display:inline-block;
    font-size:24px;
    background-color:#568dff;
    color:#fff;
    border-radius:10px;
    text-align:center;
    line-height:53px;
    position:absolute;
    left: 212px;
    top:319px;
    cursor:pointer;
}
#not_found{
    background-image:url(../images/notfound.png);
    background-position-x:-1px;
}
#not_record{
    background-image:url(../images/notrecord.png) ;
}
#upgrading{
    background-image:url(../images/upgrading.png) ;
}
#bad_request{
    background-image:url(../images/badrequest.png) ;

}
#overdue{
    background-image:url(../images/overdue.png) ;
}
/*媒体查询，参考部分Bootstarp框架*/
/*当页面大于1200px时，大屏幕，主要显示PC端*/
@media (min-width: 1200px){
}
/*在992 和1199 像素之间的屏幕里，中等屏幕，分辨率低的PC*/
@media (min-width: 992px) and (max-width: 1199px){
    #not_found{
        width:1600px;
        height: 570px;
    }
    #not_found > div {
        top: 189px;
        left: 600px;
    }
    #upgrading{
        width:1200px;
        height: 570px;
    }
    #upgrading .back_index{
        top:200px;
        left: 136px;
        width: 146px;
        height: 42px;
        font-size: 20px;
        line-height: 42px;
    }
    #overdue{
        width: 1600px;
        height: 760px;
    }
}
/*在768 和991 像素之间的屏幕里，小屏幕，主要是PAD*/
@media (min-width: 768px) and (max-width: 991px){
    #not_found{
        width:1200px;
        height: 570px;
    }
    #not_found > div {
        top: 136px;
        left: 446px;
    }
    #not_found .refresh {
        font-size: 12px;
    }
    #not_found .back_index {
        width: 88px;
        height: 24px;
        line-height: 24px;
        color: #568dff;
        font-size: 14px;
    }
    #not_record{
        width: 1200px;
        height: 570px;
    }
    #upgrading{
        width: 950px;
        height: 448px;
    }
    #upgrading .back_index{
        top: 168px;
        left: 108px;
        width: 146px;
        height: 42px;
        font-size: 20px;
        line-height: 42px
    }
    #overdue{
        width: 1200px;
        height: 600px;
    }
}
/*在480 和767 像素之间的屏幕里，超小屏幕，主要是手机*/
@media (min-width: 480px) and (max-width: 767px){
    #not_found{
        background-image:url(../images/notfound_wap.png);
        width:480px;
        height:392px;
        top:44%;
    }
    #not_found > div {
        top: 434px;
        left: calc(50% - 96px);
    }
    #not_found .refresh {
        font-size: 16px;
        display: block;
        position: relative;
        top: 68px;
        text-align: center;
        color:#696a6a;
    }
    #not_found .back_index {
        color: #568dff;
        font-size: 18px;
        width: 204px;
    }
    #bad_request{
        background-image:url(../images/badrequest_wap.png);
        width:480px;
        height:480px;
        top:44%;
    }
    #bad_request .back_index{
        bottom: -92px;
        width: 180px;
        left: calc(50% - 90px);
        font-size: 20px;
        height: 40px;
        line-height: 40px;
    }
    #upgrading{
        background-image:url(../images/updrading_wap.png);
        width:480px;
        height:342px;
        top:44%;
    }
    #upgrading .back_index{
        top:402px;
        left: calc(50% - 73px);
        width: 146px;
        height: 42px;
        font-size: 20px;
        line-height: 42px;
    }
    #not_record{
        background-image:url(../images/notrecord_wap.png);
        width:480px;
        height:480px;
    }
    #overdue{
        background-image:url(../images/overdue_wap.png);
        width: 480px;
        height: 564px;
    }
}
/*在小于480px的屏幕里，微小屏幕，更低分辨率的手机*/
@media (max-width: 479px){
    #not_found{
        background-image:url(../images/notfound_wap.png);
        width:320px;
        height:262px;
        top:44%;
    }
    #not_found > div {
        top: 284px;
        left: calc(50% - 96px);
    }
    #not_found .refresh {
        font-size: 16px;
        display: block;
        position: relative;
        top: 68px;
        text-align: center;
        color:#696a6a;

    }
    #not_found .back_index {
        color: #568dff;
        font-size: 18px;
        width: 204px;
        margin-left:0;
    }
    #bad_request{
        background-image:url(../images/badrequest_wap.png);
        width: 320px;
        height: 320px;
        top:44%;
    }
    #bad_request .back_index{
        bottom: -92px;
        width: 180px;
        left: calc(50% - 90px);
        font-size: 20px;
        height: 40px;
        line-height: 40px;
    }
    #upgrading{
        background-image:url(../images/updrading_wap.png);
        width: 320px;
        height: 228px;
        top:44%;
    }
    #upgrading .back_index{
        top: 268px;
        left: calc(50% - 65px);
        width: 130px;
        height: 36px;
        font-size: 16px;
        line-height: 36px;
    }
    #not_record{
        background-image:url(../images/notrecord_wap.png);
        width: 320px;
        height: 320px;
    }
    #overdue{
        background-image:url(../images/overdue_wap.png);
        width: 320px;
        height: 378px;
    }
}