.about-flow__item {
  position: relative;
  margin-bottom: 50px;
}
.about-flow__item::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 37px;
  width: 1px;
  height: calc(100% - 105px);
  background-color: #fa4033;
}
.about-flow__ttl {
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
  margin-bottom: 10px;
  font-size: 1.6rem;
  font-weight: 500;
}
.about-flow__num {
  border-radius: 50px;
  background-color: #fa4033;
  color: #fff;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.2em;
  text-align: center;
}
.about-flow__num span {
  display: block;
  margin-top: 2px;
  padding-left: 2px;
  font-family: "roboto", sans-serif;
  font-size: 2rem;
  font-weight: 400;
}
.about-flow__img img {
  border-radius: 5px;
}
.about-flow__signup {
  padding: 15px 4% 20px;
  background-color: #fff3d4;
  border-radius: 10px;
  font-size: 1.5rem;
  text-align: center;
}
.about-flow__tel {
  color: #ff9104;
  font-size: 1.8rem;
  font-weight: 700;
}
.about-flow__tel span {
  text-decoration: underline;
}
.system-lead {
  margin-bottom: 30px;
  font-weight: 700;
  line-height: 1.6;
  text-align: center;
}
.system-img {
  margin-top: 25px;
  padding: 12px;
  border-radius: 10px;
  border: 3px solid #ff9104;
  text-align: center;
}
@media screen and (min-width: 768px) {
  .about-flow__item {
    margin-bottom: 80px;
  }
  .about-flow__ttl {
    margin-bottom: 5px;
    font-size: 2rem;
  }
  .about-flow__num {
    width: 75px;
    height: 75px;
    margin-right: 30px;
    padding-top: 15px;
    font-size: 1.2rem;
  }
  .about-flow__num span {
    margin-top: 3px;
    padding-left: 5px;
    font-size: 3rem;
  }
  .about-flow__contents {
    width: 892px;
    margin-left: auto;
  }
  .about-flow__col2 {
    display: -webkit-box;
    display: flex;
    -webkit-box-pack: justify;
    justify-content: space-between;
  }
  .about-flow__col2-item {
    -webkit-box-flex: 1;
    flex: 1;
  }
  .about-flow__img {
    -webkit-box-ordinal-group: 2;
    order: 1;
    width: 280px;
    margin-top: -50px;
    margin-left: 30px;
  }
  .about-flow__img img {
    border-radius: 10px;
  }
  .about-flow__signup {
    padding: 40px 40px 30px;
    border-radius: 20px;
    font-size: 1.8rem;
  }
  .about-flow__tel {
    margin-left: 0.5em;
    font-size: 2.4rem;
  }
  .system {
    margin-bottom: 150px;
  }
  .system-lead {
    margin-bottom: 60px;
    font-size: 2.4rem;
  }
  .system-img {
    width: 800px;
    margin: 50px auto 0;
    padding: 20px;
    border-radius: 20px;
    border-width: 4px;
  }
}
@media screen and (max-width: 767px) {
  .about-flow__item::before {
    left: 50%;
    bottom: -45px;
    height: 30px;
  }
  .about-flow__item:last-of-type::before {
    display: none;
  }
  .about-flow__num {
    width: 50px;
    height: 50px;
    -webkit-transform: scale(0.8);
    transform: scale(0.8);
    margin-right: 5px;
    padding-top: 10px;
    font-size: 1rem;
  }
  .about-flow__img {
    margin-bottom: 15px;
    text-align: center;
  }
}