body { margin:0; padding:0; background:url(http://www.qhnews.com/2018zt/zlhz/img2/1.jpg) no-repeat 50% top #ffffff; //bg_side,jpg中间是1000PX宽的空白区域,两边都是460px宽的图片(就是一张1920px宽的图片中间1000px挖空填白色) height:900px; //高度根据你图片来定的}.main { margin:0px auto 0 auto; padding:0; width:1000px; height:900px; position:relative; background:url(http://www.qhnews.com/2018zt/zlhz/img2/1.jpg) no-repeat; //这张图是1920px宽的图片中间挖出来的1000px部分。}

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