.overview-content .a{background-image:url(a.jpg?);}
.overview-content .b{background-image:url(b.jpg);}
.overview-content .c{background-image:url(c.jpg);}
.overview-content .d{background-image:url(d.jpg);}
.overview-content .f{background-image:url(f.jpg);}
.overview-content .g{background-image:url(g-1.jpg);}
.overview-content .h{background-image:url(h.jpg);}
@media screen and (max-width:736px){
  .overview-content .a{background-image:url(mobile/a.jpg?2);}
  .overview-content .b{background-image:url(mobile/b.jpg);}
  .overview-content .c{background-image:url(mobile/c.jpg);}
  .overview-content .d{background-image:url(mobile/d.jpg);}
  .overview-content .e{background-image:url(mobile/e.jpg);}
  .overview-content .f{background-image:url(mobile/f.jpg);}
  .overview-content .g{background-image:url(mobile/g.jpg);}
  .overview-content .h{background-image:url(mobile/h.jpg);}
}