.knowledge .page-title {
  font-size: 40px;
  font-weight: 500;
  color: #2A344B;
  text-align: center;
}
.knowledge .main .first {
  width: 100vw;
  height: 808px;
  background: -webkit-gradient(linear, left bottom, left top, from(#FFFFFF), to(#FFF8F4));
  background: linear-gradient(0deg, #FFFFFF 0%, #FFF8F4 100%);
  padding: 100px 0;
  text-align: center;
}
.knowledge .main .first .content {
  margin: 100px 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.knowledge .main .first .content li {
  width: 286px;
  background: #FFFFFF;
  -webkit-box-shadow: 0 0 16px 0 rgba(63, 59, 59, 0.1);
          box-shadow: 0 0 16px 0 rgba(63, 59, 59, 0.1);
  border-radius: 10px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  padding: 20px;
}
.knowledge .main .first .content li img {
  width: 100px;
  height: 100px;
}
.knowledge .main .first .content li div {
  font-size: 18px;
  font-weight: 500;
  color: #2A344B;
  margin: 20px;
}
.knowledge .main .first .content li p {
  text-align: left;
  font-size: 16px;
  line-height: 30px;
  font-weight: 400;
  color: #2A344B;
}
.knowledge .main .first .content li p:before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 6px;
  display: inline-block;
  background-color: #2A344B;
  margin-right: 10px;
  vertical-align: middle;
}
.knowledge .main .second {
  padding: 100px 0;
}
.knowledge .main .second .part {
  padding: 100px 0;
}
.knowledge .main .second .part .content {
  width: 1200px;
  margin: 0 auto;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.knowledge .main .second .part .content img {
  width: 691px;
  height: 571px;
  display: block;
}
.knowledge .main .second .part .content .text {
  width: 440px;
}
.knowledge .main .second .part .content .text div {
  font-size: 40px;
  line-height: 46px;
  font-weight: 500;
  color: #2A344B;
  margin-bottom: 32px;
}
.knowledge .main .second .part .content .text p {
  font-size: 18px;
  font-weight: 500;
  color: #51565D;
  line-height: 26px;
}
.knowledge .main .second .reverse {
  background: -webkit-gradient(linear, left bottom, left top, from(#FFFFFF), to(#FFF8F4));
  background: linear-gradient(0deg, #FFFFFF 0%, #FFF8F4 100%);
}
.knowledge .main .second .reverse .content {
  -webkit-box-orient: horizontal;
  -webkit-box-direction: reverse;
      -ms-flex-direction: row-reverse;
          flex-direction: row-reverse;
}
.knowledge .main .third {
  padding: 100px 0;
  text-align: center;
  background: -webkit-gradient(linear, left bottom, left top, from(#FFFFFF), to(#FFF8F4));
  background: linear-gradient(0deg, #FFFFFF 0%, #FFF8F4 100%);
}
.knowledge .main .third .content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  margin: 100px 0;
}
.knowledge .main .third .content li {
  width: 248px;
  height: 248px;
  padding: 13px 33px 0;
  background-color: #17C5CA;
  border-radius: 10px;
  position: relative;
}
.knowledge .main .third .content li:after {
  content: '';
  width: 0;
  height: 0;
  border-left: 20px solid transparent;
  border-right: 20px solid transparent;
  border-top: 40px solid #17C5CA;
  position: absolute;
  -webkit-transform: translateX(-50%);
      -ms-transform: translateX(-50%);
          transform: translateX(-50%);
  left: 50%;
  bottom: -30px;
}
.knowledge .main .third .content li img {
  width: 72px;
  height: 72px;
  margin-bottom: 23px;
}
.knowledge .main .third .content li div {
  font-size: 20px;
  font-weight: 500;
  color: #fff;
  margin-bottom: 18px;
}
.knowledge .main .third .content li p {
  font-size: 14px;
  line-height: 20px;
  text-align: left;
  font-weight: 400;
  color: #FFFFFF;
}
.knowledge .main .third .content li:nth-child(2) {
  background-color: #F25A57;
}
.knowledge .main .third .content li:nth-child(2):after {
  border-top: 40px solid #F25A57;
}
.knowledge .main .third .content li:nth-child(3) {
  background-color: #526C83;
}
.knowledge .main .third .content li:nth-child(3):after {
  border-top: 40px solid #526C83;
}
.knowledge .main .third .content li:nth-child(4) {
  background-color: #F46B41;
}
.knowledge .main .third .content li:nth-child(4):after {
  border-top: 40px solid #F46B41;
}
.knowledge .main .third .picture {
  width: 1200px;
  -o-object-fit: contain;
     object-fit: contain;
  margin: 100px 0;
}
@media screen and (max-width: 700px) {
  .knowledge .page-title {
    font-size: 20px;
  }
  .knowledge .main .first {
    padding: 50px 0;
    height: auto;
  }
  .knowledge .main .first .content {
    margin: 50px 0 0;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    padding: 0 3vw;
  }
  .knowledge .main .first .content li {
    width: 43vw;
    padding: 3vw;
    margin-bottom: 40px;
  }
  .knowledge .main .first .content li img {
    width: 15vw;
    height: 15vw;
  }
  .knowledge .main .first .content li div {
    font-size: 14px;
    margin: 10px;
  }
  .knowledge .main .first .content li p {
    font-size: 12px;
    line-height: 20px;
  }
  .knowledge .main .first .content li p:before {
    width: 4px;
    height: 4px;
  }
  .knowledge .main .second {
    padding: 50px 0 0;
  }
  .knowledge .main .second .part {
    padding: 50px 0;
  }
  .knowledge .main .second .part .content {
    width: 94vw;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
  }
  .knowledge .main .second .part .content img {
    width: 94vw;
    height: auto;
  }
  .knowledge .main .second .part .content .text {
    width: 94vw;
    text-align: center;
  }
  .knowledge .main .second .part .content .text div {
    font-size: 20px;
    line-height: 32px;
    margin-bottom: 10px;
    margin-top: 20px;
  }
  .knowledge .main .second .part .content .text p {
    font-size: 12px;
    line-height: 18px;
  }
  .knowledge .main .third {
    padding: 50px 0;
  }
  .knowledge .main .third .content {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    padding: 0 3vw;
    margin: 50px 0;
  }
  .knowledge .main .third .content li {
    width: 94vw;
    height: auto;
    padding: 3vw 3vw 3vw 20vw;
    margin-bottom: 20px;
  }
  .knowledge .main .third .content li:after {
    display: none;
  }
  .knowledge .main .third .content li img {
    width: 12vw;
    height: 12vw;
    margin-bottom: 0;
    position: absolute;
    left: 4vw;
    top: 50%;
    -webkit-transform: translateY(-50%);
        -ms-transform: translateY(-50%);
            transform: translateY(-50%);
  }
  .knowledge .main .third .content li div {
    font-size: 14px;
    margin-bottom: 4px;
    text-align: left;
  }
  .knowledge .main .third .content li p {
    font-size: 12px;
    line-height: 16px;
    text-align: left;
  }
  .knowledge .main .third .picture {
    width: 94vw;
    margin: 50px 0 0;
  }
}