.main-container {
  margin-bottom: 0;
}

.introduceSection>div:first-child{
  flex: 0 0 649px;
}

.introduceSection>div:last-child {
  flex: 0 0 631px;
  background: url(./../images/service/title_service.png) no-repeat center / 600px 600px;
}

.introduceSection2 {
  width: 100%;
  max-width: 992px;
  margin: auto;
}

.introduceSection2>.h2 {
  text-align: center;
}

.introduceSection2>p {
  color: var(--color-normal);
  font-size: 18px;
  margin-bottom: 32px;
}

.introduceSection3 {
  text-align: center;
  height: 1045px;
}

.introduceSection3 .h2 {
  margin-bottom: 135.5px;

}

.introduceSection3>div {
  background-color: #0E4EFF0D;
  padding: 80px 0 128px 0;
  color: var(--color-normal);
}

.introduceSection3 .skill-list {
  display: flex;
  justify-content: space-between;
  max-width: 1280px;
  margin: auto;
}

.introduceSection3 .skill-list>li {
  flex: 0 0 410px;
  background-color: #fff;
  padding: 119.5px 48px 90px;
  box-sizing: border-box;
  box-shadow: 0px 3px 6px #00000029;
  border-radius: 12px;
  position: relative;
}

.introduceSection3 .skill-list>li::before {
  content: "";
  width: 175px;
  height: 175px;
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -50%);
}

.introduceSection3 .skill-list>li:nth-child(1):before {
  background: url(./../images/service/img_service_team.png) center / contain no-repeat;
}

.introduceSection3 .skill-list>li:nth-child(2):before {
  background: url(./../images/service/img_service_team2.png) center / contain no-repeat;
}

.introduceSection3 .skill-list>li:nth-child(3):before {
  background: url(./../images/service/img_service_team3.png) center / contain no-repeat;
}

.introduceSection3 .skill-list>li::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  display: block;
  width: 100%;
  height: 8px;
  background-color: #0324A8;
  border-radius: 0px 0px 12px 12px;
}

.introduceSection3 .skill-list .title {
  font-size: 24px;
  font-weight: bold;
  margin: 0 0 24px 0;
}

.introduceSection3 .skill-list .description {
  text-align: left;
}

.introduceSection3 .skill-list .dot-list {
  text-align: left;
}

.introduceSection3 .skill-list .dot-list li::before {
  content: "\2022";
  font-weight: bold;
  display: inline-block;
  width: 1em;
  color: var(--color-normal);
}

.introduceSection3 .skill-list .dot-list li {
  color: var(--color-hover);
  margin-top: 8px;
}


@media screen and (max-width: 1280px) {
  .introduceSection>div:first-child {
    flex: 1 0 100%;
    align-self: start;
    margin-bottom: 15px;
  }

  .introduceSection>div:last-child {
    flex: 0 0 100%;
    max-width: 633px;
  }

  .introduceSection>div:last-child::after {
    content: "";
    display: block;
    padding-top: 100%;
    width: 100%;
  }
  .introduceSection3 {
    height: auto;
    width: 100vw;
    margin-left: -15px;
  }

  .introduceSection3>div {
    position: initial;
  }

  .introduceSection3 .skill-list {
    flex-direction: column;
  }

  .introduceSection3 .skill-list>li {
    margin-bottom: 135px;
    margin-left: 15px;
    margin-right: 15px;
  }

  .introduceSection3 .skill-list>li:last-child {
    margin-bottom: 0;
  }
}