Ҳģ.detail-extend{ max-width: 984px; width: 100%; margin:0 auto; } .detail-extend .product_c{ margin:30px 0; } .detail-extend .product-title{ position: relative; border-bottom: 1px solid #ddd; padding-bottom: 5px; text-align: center; font-family: Open Sans,Arial,Helvetica,sans-serif,Heiti; font-size: 20px; font-weight: bold; } .detail-extend .product-title:after{ content: ""; position: absolute; width: 60px; height: 3px; background: #000; bottom: -2px; left: 50%; margin-left: -30px; } .detail-extend img{ display: block; text-align: center; margin: 25px auto; }