.qr_space {
    position: relative;
    margin: 0 auto;
    width: 750px;
    min-height: 676px;
}
.navBar a:nth-child(4){
    color: rgba(255, 255, 255, 1);
}
.qr_content {
    width: 750px;
    height: 364px;
    margin-top: 79px;
    background-color: #fff;
    background-image: url(../images/qr_bg.png);
    background-size: 100%;
}

.qr_title {
    margin: 0;
    padding: 0;
    text-align: center;
    font-size: 19px;
    color: #1A1A1A;
    padding-top: 93px;
    font-weight:500;
}
.qr_img{
    display: block;
    height: 114px;
    width: 114px;
    margin-left:50%;
    transform: translateX(-50%); 
    margin-top: 12px;
}
.qr_text{
    margin: 0;
    padding: 0;
    text-align: center;
    font-size: 13px;
    color: #333333;
    margin-top: 7px;
}