.platform_intro_top {
  display: flex;
  padding-left: 10%;
  padding-top: 55px;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_top {
    display: block;
    padding-left: 0;
    padding-top: 20px;
  }
}
.platform_intro_top .quotes {
  font-size: 120px;
  color: #1a95ce;
  opacity: 0.1;
  margin-right: 52px;
  font-weight: bold;
  line-height: 1.2;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_top .quotes {
    display: block;
    line-height: 1;
    font-size: 78px;
  }
}
.platform_intro_top .txt_box {
  flex: 1;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_top .txt_box {
    margin-top: -30px;
  }
}
.platform_intro_top .txt_box .tit {
  font-size: 40px;
  color: #1a95ce;
  font-weight: bold;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_top .txt_box .tit {
    font-size: 28px;
  }
}
.platform_intro_top .txt_box .desc {
  font-size: 22px;
  margin-top: 32px;
  font-weight: 500;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_top .txt_box .desc {
    font-size: 16px;
    margin-top: 16px;
  }
}
.platform_intro_img {
  text-align: center;
  margin-top: 100px;
  padding: 60px;
  background-color: #f9f9f9;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_img {
    margin-top: 48px;
    padding: 24px;
  }
}
.platform_intro_img img {
  max-width: 100%;
}
.platform_intro_img img.m_only {
  display: none;
}
@media only screen and (max-width: 1260px) {
  .platform_intro_img img.m_only {
    display: inline-block;
  }
}
@media only screen and (max-width: 1260px) {
  .platform_intro_img img.pc_only {
    display: none;
  }
}

.platform_center_1 {
  height: 400px;
  background-repeat: no-repeat;
  background-position: center center;
  display: flex;
  align-items: flex-end;
  padding: 48px;
  box-sizing: border-box;
  background-image: url(/img/platform/center_img1.png);
  background-size: cover;
}
.platform_center_1 .txt_box {
  color: #fff;
}
.platform_center_1 .txt_box .tit {
  font-size: 40px;
}
.platform_center_1 .txt_box .tit_e {
  font-size: 20px;
}
@media only screen and (max-width: 1260px) {
  .platform_center_1 {
    height: 36vw;
    min-height: 240px;
    padding: 20px;
  }
  .platform_center_1 .txt_box .tit {
    font-size: 24px;
  }
  .platform_center_1 .txt_box .tit_e {
    font-size: 14px;
  }
}
.platform_center_2 {
  margin-top: 120px;
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 {
    margin-top: 60px;
  }
}
.platform_center_2 .sec {
  display: flex;
  align-items: center;
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 .sec {
    display: block;
  }
}
.platform_center_2 .sec .txt_box {
  font-size: 18px;
  color: #666;
}
.platform_center_2 .sec .txt_box p + p {
  margin-top: 24px;
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 .sec .txt_box {
    font-size: 14px;
  }
}
.platform_center_2 .sec img {
  width: 100%;
}
.platform_center_2 .sec .img_box {
  flex-shrink: 0;
}
.platform_center_2 .sec1 .img_box {
  margin-right: 80px;
  width: 44.6%;
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 .sec1 .img_box {
    width: 100%;
    margin-right: 0;
  }
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 .sec1 .txt_box {
    margin-top: 40px;
  }
}
.platform_center_2 .sec2 .img_box {
  margin-left: 110px;
  width: 42.9%;
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 .sec2 .img_box {
    width: 100%;
    margin-left: 0;
    margin-top: 40px;
  }
}
.platform_center_2 .slogan {
  font-size: 48px;
  padding: 100px 0;
  text-align: center;
}
.platform_center_2 .slogan br {
  display: none;
}
@media only screen and (max-width: 1260px) {
  .platform_center_2 .slogan {
    font-size: 28px;
    padding: 60px 0;
    font-weight: normal;
  }
  .platform_center_2 .slogan br {
    display: block;
  }
}
.platform_center_3 {
  background-color: #f9f9f9;
  padding: 80px 65px 60px;
  margin-top: 100px;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 {
    margin-top: 60px;
    padding: 35px 25px 43px;
  }
}
.platform_center_3 .tit {
  font-size: 32px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 60px;
}
.platform_center_3 .tit br {
  display: none;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .tit {
    font-size: 24px;
    margin-bottom: 30px;
  }
  .platform_center_3 .tit br {
    display: block;
  }
}
.platform_center_3 .diagram_tit {
  text-align: center;
  width: 100%;
  padding-bottom: 52px;
  position: relative;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_tit {
    padding-bottom: 0;
    padding: 0 25px;
    box-sizing: border-box;
    z-index: 10;
  }
  .platform_center_3 .diagram_tit::before {
    content: "";
    position: absolute;
    width: 2px;
    height: 50%;
    left: 0;
    top: 0;
    background-color: #f9f9f9;
  }
}
.platform_center_3 .diagram_tit img {
  position: relative;
  z-index: 1;
}
.platform_center_3 .diagram_tit::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 1px;
  height: 100%;
  background-color: #cdcdcd;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_tit::after {
    left: 0;
    bottom: 50%;
    width: 50%;
    height: 1px;
  }
}
.platform_center_3 .diagram_items {
  display: flex;
  flex-wrap: wrap;
  gap: 0 40px;
  position: relative;
}
.platform_center_3 .diagram_items::before {
  content: "";
  position: absolute;
  height: 1px;
  background-color: #cdcdcd;
  top: 12.5px;
  left: calc((33.3333333333% - 26.6666666667px) / 2);
  right: calc((33.3333333333% - 26.6666666667px) / 2);
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_items::before {
    width: 1px;
    height: calc(100% + 100px);
    top: auto;
    bottom: 0;
    left: 0;
    right: auto;
  }
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_items {
    display: block;
  }
}
.platform_center_3 .diagram_item {
  flex: 1;
  padding-top: 56px;
  position: relative;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_item {
    padding-top: 0;
    padding-left: 25px;
    margin-top: 40px;
  }
  .platform_center_3 .diagram_item:last-child::before {
    content: "";
    position: absolute;
    width: 2px;
    height: 100%;
    background-color: #f9f9f9;
    left: 0;
    bottom: 0;
  }
}
.platform_center_3 .diagram_item .dot {
  position: absolute;
  left: 50%;
  margin-left: -13px;
  top: 0;
  width: 26px;
  height: 26px;
  border: 1px solid #1a95ce;
  box-sizing: border-box;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f9f9f9;
}
.platform_center_3 .diagram_item .dot::after {
  content: "";
  width: 12px;
  height: 12px;
  background-color: #1a95ce;
  border-radius: 50%;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_item .dot {
    left: -13px;
    margin-left: 0;
  }
}
.platform_center_3 .diagram_item_tit {
  display: block;
  font-size: 20px;
  font-weight: bold;
  text-align: center;
  margin-bottom: 16px;
}
@media only screen and (max-width: 1260px) {
  .platform_center_3 .diagram_item_tit {
    text-align: left;
  }
}
.platform_center_3 .diagram_item_cont {
  background-color: #f2f8fb;
  border: 1px solid #daeef8;
  padding: 16px;
}
.platform_center_3 .diagram_item_cont .cont_list_tit {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
  color: #1a95ce;
  font-size: 14px;
}
.platform_center_3 .diagram_item_cont .cont_list + .cont_list_tit {
  margin-top: 16px;
}
.platform_center_3 .diagram_item_cont .cont_list li {
  padding-left: 0.8em;
  position: relative;
  color: #666;
  font-size: 14px;
}
.platform_center_3 .diagram_item_cont .cont_list li + li {
  margin-top: 8px;
}
.platform_center_3 .diagram_item_cont .cont_list li::before {
  content: "-";
  position: absolute;
  left: 0;
  top: 0;
}