.overview-content .a{background-image:url(./img/01-banner_web.jpg);}
.overview-content .b{background-image:url(./img/b.jpg);}
.overview-content .c{background-image:url(./img/c.jpg);}
.overview-content .f{background-image:url(./img/f.jpg);}
.overview-content .g{background-image:url(./img/g.jpg);}
.overview-content .i{background-image:url(./img/i.jpg);}
.overview-content .i .i1{top: 32.5em;left: 8.8em;}
.overview-content .i .i12{top:10em;}
@media (max-width:736px){
  .overview-content .a{background-image:url(./m/01-banner_m.jpg);}
  .overview-content .b{background-image:url(./m/b.jpg);}
  .overview-content .c{background-image:url(./m/c.jpg);}
  .overview-content .f{background-image:url(./m/f.jpg);}
  .overview-content .g{background-image:url(./m/g.jpg);}
  .overview-content .i{background-image:url(./m/i.jpg);}
  .overview-content .i .i1{top: 4em;left: 1.8em;}
  .overview-content .i .i12{top: auto;left: 10vw;bottom: -29vw;}
}