.overview-content .a {background-image: url(./img/a.jpg);}
.overview-content .b {background-image: url(./img/b.jpg);}
.overview-content .c:before {background-image: url(./img/c.png);}
.overview-content .e {background-image: url(./img/e.jpg);}
.overview-content .g {background-image: url(./img/g.jpg);}
@media (max-width: 736px) {
  .overview-content .a {background-image: url(./m/a.jpg);}
  .overview-content .b {background-image: url(./m/b.jpg);}
  .overview-content .c {background-image: url(./m/c.jpg);}
  .overview-content .e {background-image: url(./m/e.jpg);}
  .overview-content .e .note {padding-right: 35%;}
  .overview-content .g {background-image: url(./m/g.jpg);}
}