.about-item {
  margin: 20px auto;
}
.about-introduce .about-introduce-title {
  width: 100%;
  margin: 40px auto;
  text-align: center;
}
.about-introduce .about-introduce-img img {
  width: 100%;

}
.about-introduce-name {
  color: rgb(0, 51, 118);
  font-family: 微软雅黑;
  font-size: 20px;
  font-style: normal;
  font-variant-ligatures: normal;
  font-variant-caps: normal;
  font-weight: normal;
  line-height: 180%;
  margin-bottom: 20px;
}
.solution-advantage-card-list_item-img {
  width: 100%;
}
.about-join-name {
  color: rgb(0, 51, 118);
  font-family: 微软雅黑;
  font-size: 20px;
  font-style: normal;
  font-variant-ligatures: normal;
  font-variant-caps: normal;
  font-weight: bolder;
  line-height: 180%;
  margin-bottom: 20px;
  text-align: center;
}


.about-introduce .about-introduce-title h1 {
  margin: 0;
  padding: 0;
  font-size: 30px;
  line-height: 52px;
  text-align: center;
  color: #262627;
}

.about-join-card-list__item .about-join-card-list_item-title{
  text-align: center;
}
.about-join-card-list__item .about-join-card-list_item-doc{
  text-align: left;
}
.about-join-card-list__item .about-join-card-list_item-title h2{
  margin-top: 20px;
  margin-bottom: 5px;
}