.banner{}
.banner .banner_img{
    width: 100%;
}

#certificate_box{
    margin-bottom: 100px;
}
#certificate_box .top_box{
    border: 2px solid #146C9F;
    padding: 20px;
    border-left: none;
    border-right: none;
    margin-top: 50px;
    font-size: 20px;
    color: #ccc;
}
#certificate_box .li_img{
    width: 50px;
    opacity: 0.5;
}
#certificate_box .top_box span:hover{
    color: #000;
}
#certificate_box .top_box span:hover .li_img{
    opacity: 1;
}
#certificate_box .top_box .left{
    width: 50%;
    display: inline-block;
    text-align: right;
    padding-right: 50px;
    border-right: 2px solid #146C9F;
    color: #ccc;
}
#certificate_box .top_box .right{
    padding-left: 50px;
    color: #ccc;
}
#certificate_box .top_box .select{
    color: #000;
}
#certificate_box .top_box .select .certificate_img{
    opacity: 1;
}
#certificate_box .content_box{
    background-color: #E6E6E5;
    padding-top: 35px;
    margin: 30px 0px;
}
#certificate_box .content_box .img{
    width: 90%;
    display: block;
    margin: auto;
    cursor: pointer;
}
#certificate_box .content_box .bottom{
    margin-top: 30px;
}
#certificate_box .content_box .info_bg{
    padding: 15px;
    background-color: #726F71;
}
#certificate_box .content_box .bottom span{
    display: block;
    width: 100%;
    text-align: center;
    color: #fff;
    line-height: 25px;
}
#certificate_box .content_box .big_img_button{
    width: 90px!important;
    margin: auto;
    background-color: aliceblue;
    color: #333!important;
    padding: 3px;
    margin-bottom: 25px;
}
#certificate_box .content_box .big_img_button:hover{
    opacity: 0.7;
}
.big_certificate_img{
    display: none;
    position: absolute;
    width: 100%;
    top: 0px;
    left: 0px;
    right: 0px;
    padding: 30px;
    min-height: 100%;
    background-color: aliceblue;
    padding-bottom: 1000px;
    padding-top: 53px;
}
.big_certificate_img .img{
    width: 100%;
}
.big_certificate_img .close_button{
    width: 90px;
    background-color: lightblue;
    color: #fff;
    padding: 3px;
    position: fixed;
    top: 15px;
    left: 30px;
}
.big_certificate_img .close_button:hover{
    color: #000;
}