#using_intro__logo{
  width: 60%;
  max-width: 20rem;
  margin: 0 auto 3rem;
}
#using_intro p{
  font-size: 1.6rem;
  line-height: 2;
  text-align: center;
}

#using_rule__wrap{
  height: 40rem;
  border: #999 solid 1px;
  padding: 2rem 5%;
  overflow: auto;
  margin-top: 3rem;
}
.using_rule__block{
  margin-bottom: 3rem;
}
.using_rule__block h3{
  text-align: left;
  margin-bottom: 1rem;
  font-size: 1.4rem;
}
.using_rule__block p{
  margin: 1rem 0;
}
.using_flow__box{
  display: flex;
  position: relative;
}
.using_flow__box:not(:last-child)::before{
  content: '';
  background: var(--black);
  bottom: 0;
  left: 3rem;
  width: 2px;
  height: calc(100% - 6rem);
  position: absolute;
}
.using_flow__num{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 6rem;
  height: 6rem;
  background: var(--black);
  color: #fff;
  font-size: 1.8rem;
  border-radius: 50%;
  margin-right: 2rem;
}
.using_flow__inner{
  flex: 1;
  padding: 1.5rem 0 3rem
}
.using_flow__inner h3{
  text-align: left;
  margin-bottom: 1rem;
}
.using_flow__inner p{
  font-size: 1.4rem;
}
#using_form__tab{
  border: 0;
  margin-bottom: 5rem;
}
#using_form__tab .btn_link{
  max-width: 100%;
  border-radius: 1rem;
  font-size: 1.6rem;
}
#using_form__txt{
  font-size: 1.4rem;
  text-align: center;
  margin-bottom: 2rem;
}
.block_title{
  border-bottom: var(--black) solid 2px;
  padding-bottom: 1rem;
}
@media screen and (min-width: 768px){

}