.c-main{
  background-image: url('../img/bg.png');
  background-repeat: repeat;
  background-position: center top;
  background-size: 14px 7px;
}

.c-main__link01{
  display: block;
  position: absolute;
  top: 2%;
  left: 11%;
  width: 17.1875%;
}

.c-main__link02{
  display: block;
  position: absolute;
  top: 2%;
  left: 45.3%;
  width: 21.875%;
}

.c-main__link03{
  display: block;
  position: absolute;
  top: 23.5%;
  left: 11%;
  width: 18.125%;
}