section{
    position: relative;
}
section img_bg img{
    width: 100%;
}
.text_box{
    position: absolute;
    z-index: 100;
    top:0;
    height: 100%;
}

.content_box{
    margin-top: 1.25rem;
    padding: 0.1rem 0rem;
    padding: 0 0.7rem;
}
.content_box h3{
    font-size: 0.5rem;
    font-weight: 600;
}
.content_box p{
    font-size: 0.3rem;
    margin-top: 0.2rem;
    line-height: .5rem;
}



/*产品参数开始*/
.product_param{
    margin-top: 1rem;
}
.product_param .product_param_title{
    text-align: center;
}
.product_param .product_param_title h3{
    font-size: 0.5rem;
}
.product_param_img{
    text-align: center;
    margin: 0.5rem auto 0.5rem auto;
}
.product_param_img img{
    width: 4rem;
    margin: 0 auto;
}
.product_param_img h3{
    font-size: 0.4rem;
    color: #000000;
}
.product_param_img p{
    font-size: 0.3rem;
    color: #2c2c2c;
}

.product_param_text{
    width: 90%;
    margin: 0 auto;
    padding-top: 0.3rem;
    text-align: center;
}
.product_param_text.blank_line{
    border-top: 1px solid #a2a2a2;
}
.product_param_text li{
    display: flex;
}
.product_param_text li.product_param_item{
    margin-top: 0.2rem;
}
.product_param_text li span{
    font-size: 0.25rem;
    font-weight: 500;
    line-height: 0.6rem;
    display: block;
    text-align: left;
}
.product_param_text li .title{
    box-sizing: border-box;
    width:2.2rem;
    overflow: hidden;
    margin-right: 0.2rem;
    text-align: left;
    font-weight: 600;
    display: block;
}

.product_param_text li .title.blank{
    width: 0;
}

.product_param_text li .desc{
    flex: 1;
    color: #999;
}
.product_param_bottom{
    font-size: 0.25rem;
    text-align: center;
    margin: 1rem 0.3rem;
}
/*产品参数结束*/