.business_area.re2004 article {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.business_area.re2004 article .top_title {
  width: 100%;
}
.business_area.re2004 article>div {
  width: 50%;
  text-align: center;
}
.business_area.re2004 article>div .block {
  position: static;
  padding: 0 5%;
}
.business_area.re2004 article>div .block .heading {
  font-size: 30px;
}
.business_area.re2004 article>div .block p {
  font-size: 16px;
}
.business_area.re2004 article>div .block a.btn {
  margin: auto;
}
.business_area.re2004 article div.b1 {
  background-image: url(../img/business_b1_bg_r.jpg);
}
.business_area.re2004 article div.b2 {
  background-image: url(../img/business_b2_bg_r.jpg);
}
.business_area.re2004 article div.b3 {
  background-image: url(../img/business_b3_bg_r.jpg);
}
.business_area.re2004 article div.b4 {
  background-image: url(../img/business_b4_bg_r.jpg);
}
.strength_area {
  background-image: url(../img/top_strength_r.png);
  margin-bottom: 0;
  background-position: center left 52vw;
}
.strength_area .block,
.strength_area .block p {
  margin-bottom: 0;
  font-size: 14px;
}
.strength_area .block .heading {
  font-size: 24px;
}
.strong_point ol {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
}
.strong_point ol li {
  width: 100%;
  color: #fff;
  padding: 40px 3vw;
}
.strong_point ol li:nth-of-type(1) {
  background-color: #019376;
}
.strong_point ol li:nth-of-type(2) {
  background-color: #199D81;
}
.strong_point ol li:nth-of-type(3) {
  background-color: #44AF98;
}
.strong_point ol li span {
  display: block;
  text-align: center;
  margin-bottom: 10px;
}
.strong_point ol li h3 {
  min-height: 2.3em;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 23px;
  margin-bottom: 10px;
  line-height: 1.3;
  width: 100%
}
.business_tab article {
  max-width: 1250px;
  width: 100%;
  margin: auto;
}
.business_tab article h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 10px;
}
.business_tab article p {
  text-align: center;
  margin-bottom: 50px;
}
.tab_btn {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: flex-end;
}
.tab_btn li {
  width: calc(25% - 1px);
  padding: 10px 5px;
  font-size: 24px;
  background-color: #40B196;
  color: #fff;
  text-align: center;
  display: flex;
  flex-wrap: nowrap;
  justify-content: center;
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
  cursor: pointer;
  transition: .3s;
  position: relative;
  margin-top: 20px;
}
.tab_btn li.active,
.tab_btn li:hover {
  padding: 20px 5px;
  background-color: #019876;
  margin-top: 0;
}
.tab_btn li::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 10px 0 10px;
  border-color: #019876 transparent transparent transparent;
  position: absolute;
  bottom: -10px;
  left: 0;
  right: 0;
  margin: auto;
  opacity: 0;
  transition: .3s;
}
.tab_btn li.active::after {
  opacity: 1;
}
.tab_contents {
  padding: 60px 60px 100px;
  margin-bottom: 100px;
  background-color: #F0F0F0;
}
.tab_contents li {
  display: none;
}
.tab_contents li.active {
  display: block;
}
.tab_contents li h3 {
  width: 250px;
  text-align: center;
  border-bottom: 4px solid #019876;
  font-size: 24px;
  margin: auto;
  padding-bottom: 10px;
  margin-bottom: 30px;
}
.tab_contents li img {
  margin-bottom: 50px;
}
.tab_contents li strong {
  font-size: 20px;
  color: #019876;
  margin-bottom: 20px;
  display: block;
  text-align: center;
}
.tab_contents li p {
  text-align: left;
  margin-bottom: 20px;
}
.tab_contents li p:last-of-type {
  margin-bottom: 0;
}


@media screen and (max-width:600px) {
  .business_area.re2004 article>div {
    width: 100%;
    -webkit-background-size: cover;
    background-size: cover;
    padding: 10% 0;
    color: #fff;
  }
  .business_area.re2004 article>div a.btn {
    color: #333;
  }
  .strength_area {
    background-position: center top 120px;
    -webkit-background-size: contain;
    background-size: contain;
  }
  .strong_point ol {
    flex-wrap: wrap;
  }
  .strong_point ol li {
    padding: 40px 5%;
  }
  .business_tab article h2 {
    font-size: 24px;
    padding: 0 5%;
  }
  .business_tab article>p {
    margin-bottom: 30px;
    padding: 0 5%;
  }
  .tab_btn li {
    font-size: 3.83vw;
    padding: 10px 1%;
    margin-top: 10px;
  }
  .tab_btn li.active {
    padding: 15px 1%;
    margin-top: 0;
  }
  .tab_contents {
    padding: 10% 5%;
    margin-bottom: 10%;
    background-color: #F0F0F0;
  }
  .tab_contents li h3 {
    font-size: 20px;
  }
  .tab_contents li img {
    margin-bottom: 30px;
  }
  .tab_contents li strong {
    font-size: 18px;
  }
}