.headbg{background-image:url(./headbg.DtDnOAA4.png);background-position:50% -50px;background-size:100% 100%}@media (width<=768px){.headbg{background-image:none}}.f7bg{background-image:url(./bg.BiyCWxBG.png);background-position:top;background-size:100% 100%}