/*  */
.xx_back{background: url(/eportal/fileDir/jggs/resource/cms/2018/01/img_pc_site/xx_back.jpg) no-repeat center top;background-size: 1920px;height:auto;padding-top:313px;}

.xx_center{background:#fff;min-height:800px;}


/* nav */
.xx_nav{padding:15px;}