body,html{ height:100%;margin: 0;width: 100%;}






.product_banner{width: 100%;display: block;overflow:hidden;background-color: #f4f4f4;}
.product_banner .pr_box{width: 1260px;margin: auto;}
.product_banner .lef{float: left;}
.product_banner .lef img{margin: auto;display: block;max-width:100%;}
.product_banner .rig{width: 50%;float: right;box-sizing: border-box;padding: 0 70px;margin-top: 73px;}
.product_banner .rig h4{font-size: 30px;color: #222;}
.product_banner .rig .line{width: 100%;border-top: 1px solid #DDD;margin: 30px 0;}
.product_banner .rig p{font-size: 16px;color: #666;line-height: 26px;letter-spacing: 1px;}
.product_details{width: 100%;display: block;overflow: hidden;}
.product_details img{margin: 0 auto;display: block;}