.dialog{
    height: 100%;
    width: 100%;
    position: fixed;
    left: 0%;
    top: 0%;
    display: none;
    z-index: 999;
}
.dialog_bj{
    height: 100%;
    width: 100%;
    background: url(../images/d_mask.png);
    background-size: 100%;
    position: absolute;
    top: 0;
    left: 0;
    cursor: pointer;
}
.dialog_pic{
    position: absolute;
    top: 50%;
    right: 50%;
    left: 50%;
    width: 720px;
    height: 420px;
    margin-left: -360px;
    margin-top: -220px;
    background: #fff;
    box-sizing: border-box;
    z-index: 999;
}
.dialog_pic img{
    display: inherit;
    margin: 0 auto;
    margin-top: 70px;
}
.dialog_close{
    width: 50px;
    height: 50px;
    background: url(../images/dialog_close.png) no-repeat center center;
    position: absolute;
    top: 30px;
    right: 30px;
    cursor: pointer;
}
.dialog_close:hover{
    background: url(../images/dialog_close_hover.png) no-repeat center center;
}