.ai__section .section_1 {
  background-color: #fff;
  padding: 80px 0;
}

.ai__section .section_1 .line {
  font-size: 18px;
  font-size: 1.8rem;
  line-height: 2;
  text-align: center;
  margin-bottom: 40px;
}

.ai__section .section_1 .img {
  max-width: 100%;
}

.ai__section .section_2 .flex {
  align-items: stretch;
}

.ai__section .section_2 .flex .img_con {
  width: 50%;
}

.ai__section .section_2 .flex .img_con img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ai__section .section_2 .flex .txt_con {
  width: 50%;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.ai__section .section_2 .flex .txt_con li {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 20px 40px;
  position: relative;
  z-index: 1;
}

.ai__section .section_2 .flex .txt_con li b {
  width: 20px;
  height: 20px;
  background: url(../images/ai/b_ico_1.png) center no-repeat;
  position: absolute;
  top: 32px;
  right: 40px;
}

.ai__section .section_2 .flex .txt_con li.active {
  height: 37%;
}

.ai__section .section_2 .flex .txt_con li.active b {
  background-image: url(../images/ai/b_ico_2.png);
}

.ai__section .section_2 .flex .txt_con li.active h3 i.ico_1 {
  background-image: url(../images/ai/ico_1_r.png);
}

.ai__section .section_2 .flex .txt_con li.active h3 i.ico_2 {
  background-image: url(../images/ai/ico_2_r.png);
}

.ai__section .section_2 .flex .txt_con li.active h3 i.ico_3 {
  background-image: url(../images/ai/ico_3_r.png);
}

.ai__section .section_2 .flex .txt_con li.active h3 i.ico_4 {
  background-image: url(../images/ai/ico_4_r.png);
}

.ai__section .section_2 .flex .txt_con li.active h3 i.ico_5 {
  background-image: url(../images/ai/ico_5_r.png);
}

.ai__section .section_2 .flex .txt_con li.active h3 span {
  font-weight: 700;
}

.ai__section .section_2 .flex .txt_con li h3 {
  cursor: pointer;
}

.ai__section .section_2 .flex .txt_con li h3 i, .ai__section .section_2 .flex .txt_con li h3 span {
  display: inline-block;
  vertical-align: middle;
}

.ai__section .section_2 .flex .txt_con li h3 i {
  background-repeat: no-repeat;
  background-position: center;
  width: 40px;
  height: 40px;
  margin-right: 20px;
}

.ai__section .section_2 .flex .txt_con li h3 i.ico_1 {
  background-image: url(../images/ai/ico_1.png);
}

.ai__section .section_2 .flex .txt_con li h3 i.ico_2 {
  background-image: url(../images/ai/ico_2.png);
}

.ai__section .section_2 .flex .txt_con li h3 i.ico_3 {
  background-image: url(../images/ai/ico_3.png);
}

.ai__section .section_2 .flex .txt_con li h3 i.ico_4 {
  background-image: url(../images/ai/ico_4.png);
}

.ai__section .section_2 .flex .txt_con li h3 i.ico_5 {
  background-image: url(../images/ai/ico_5.png);
}

.ai__section .section_2 .flex .txt_con li h3 span {
  font-size: 24px;
  font-size: 2.4rem;
  color: #23514A;
}

.ai__section .section_2 .flex .txt_con li .con {
  padding-top: 20px;
  display: none;
}

.ai__section .section_2 .flex .txt_con li .con p {
  font-size: 16;
  font-size: 1.6rem;
  line-height: 1.8;
}

.ai__section .section_3 {
  background: url(../images/ai/bg_1.jpg) center top no-repeat;
  background-size: 100% 100%;
  padding: 80px 0;
}

.ai__section .section_3 .flex {
  align-items: center;
  justify-content: space-between;
}

.ai__section .section_3 .txt_con {
  width: 40%;
}

.ai__section .section_3 .txt_con .comm25_title {
  text-align: left;
}

.ai__section .section_3 .txt_con p {
  font-size: 18px;
  font-size: 1.8rem;
  line-height: 1.7;
}

.ai__section .section_3 .img_con {
  width: 35%;
}

.ai__section .section_3 .img_con img {
  display: block;
  width: 100%;
}