.bc-banner-ad{margin:16px 0;padding:8px 0;text-align:center;overflow:hidden;border-top:1px solid #8883}.bc-banner-ad>small{display:block;font-size:11px;color:#777;margin-bottom:6px}.bc-banner-slot{width:300px;max-width:100%;min-height:250px;margin:auto}.bc-banner-slot ins{display:block}