body {
  background: #f5f7fa;
}

.main1 {
  margin-top: -350px;
}
.main1 .main1_address {
  -webkit-box-shadow: 1px 1px 3px #d2d2d2;
          box-shadow: 1px 1px 3px #d2d2d2;
  position: relative;
  margin: 0 auto 50px;
  border-radius: 10px;
  width: 1180px;
  background: #fff;
  z-index: 9;
  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;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-pack: start;
      -ms-flex-pack: start;
          justify-content: flex-start;
  padding: 10px 10px 1px 10px;
}
.main1 .main1_address a {
  border: #92bdf8 1px solid;
  text-align: center;
  color: #92bdf8;
  margin-bottom: 10px;
  font-size: 16px;
  padding: 12px 0px;
  width: 6%;
  margin-right: 1%;
  border-radius: 10px;
}
.main1 .main1_address a:hover {
  color: #fff;
  background: #153889;
}
.main1 .main1_address a:nth-child(14n) {
  margin-right: 0;
}
.main1 .main1_address .active {
  background: #153889;
  color: #fff;
  border-color: #153889;
}
.main1 .main1_content {
  -webkit-box-shadow: 1px 1px 3px #d2d2d2;
          box-shadow: 1px 1px 3px #d2d2d2;
  width: 1200px;
  margin: 0 auto;
  position: relative;
  background: #fff;
  border-radius: 10px;
}
.main1 .main1_content .main1_content_box {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-align: start;
      -ms-flex-align: start;
          align-items: flex-start;
  background: url("../images/learn-11-main1_fonts.png") no-repeat;
  background-size: 876px auto;
  background-position: 30px 30px;
  padding: 63px 0;
}
.main1 .main1_content .main1_content_left {
  width: 480px;
  margin-left: 30px;
}
.main1 .main1_content .main1_content_left img {
  display: block;
  width: 100%;
}
.main1 .main1_content .main1_content_right {
  width: 611px;
  margin-right: 40px;
}
.main1 .main1_content .main1_content_right .main1_content_right_title {
  font-size: 30px;
  font-weight: bold;
  color: #333333;
  padding-left: 30px;
  position: relative;
  margin-bottom: 67px;
  display: block;
}
.main1 .main1_content .main1_content_right .main1_content_right_title::before {
  content: "";
  width: 8px;
  height: 20px;
  background: #153889;
  position: absolute;
  left: 0;
  top: 14px;
}
.main1 .main1_content .main1_content_right .main1_content_right_fonts span {
  text-indent: 36px;
  font-size: 18px;
  color: #666666;
  margin-bottom: 18px;
  display: block;
}

.main2 {
  width: 1200px;
  margin: 0 auto;
  padding-top: 130px;
  background: url("../images/learn-11-main2_fonts.png") no-repeat;
  background-size: 1035px auto;
  background-position: center 80px;
}
.main2 .main2_title {
  text-align: center;
  font-size: 30px;
  font-weight: bold;
  color: #333;
  letter-spacing: 7px;
  margin-bottom: 40px;
  display: block;
}
.main2 .main2_choose {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: start;
      -ms-flex-pack: start;
          justify-content: flex-start;
  width: 1160px;
  margin: 0 auto 20px;
}
.main2 .main2_choose a {
  width: 275px;
  margin-right: 20px;
  background: #fff;
  font-size: 22px;
  font-weight: bold;
  color: #666666;
  text-align: center;
  padding: 30px 0px;
  border-radius: 10px;
  -webkit-box-shadow: 1px 1px 3px #d2d2d2;
          box-shadow: 1px 1px 3px #d2d2d2;
}
.main2 .main2_choose .active {
  background: #153889;
  color: #fff;
}
.main2 .main2_choose a:nth-child(4n) {
  margin-right: 0px;
}
.main2 .main2_content {
  width: 1160px;
  margin: 0 auto;
  border-radius: 10px;
  background: #fff;
  -webkit-box-shadow: 1px 1px 3px #d2d2d2;
          box-shadow: 1px 1px 3px #d2d2d2;
  padding: 18px 0 30px;
  position: relative;
}
.main2 .main2_content .swiper {
  display: none;
  width: 1095px;
  margin: 0 auto;
  overflow-x: hidden;
  position: relative;
}
.main2 .main2_content .swiper .swiper_title {
  margin-left: 20px;
  position: relative;
  font-size: 24px;
  color: #153889;
  margin-bottom: 19px;
  font-weight: bold;
}
.main2 .main2_content .swiper .swiper_title::after {
  position: absolute;
  top: 10px;
  left: -18px;
  width: 8px;
  height: 20px;
  background: #153889;
  content: "";
}
.main2 .main2_content .swiper .swiper-wrapper .swiper-slide img {
  display: block;
  width: 95%;
  margin: 0 auto;
}
.main2 .main2_content .swiper-pagination {
  display: none;
  bottom: -11px;
  left: 0;
  right: 0;
  margin-left: auto;
  margin-right: auto;
}
.main2 .main2_content .swiper-pagination .swiper-pagination-bullet {
  margin: 0 5px;
  background: #153889;
  opacity: 0.5;
}
.main2 .main2_content .swiper-pagination .swiper-pagination-bullet-active {
  opacity: 1;
}

.main3 {
  width: 1200px;
  margin: 0 auto;
  padding-top: 130px;
  background: url("../images/learn-11-main3_fonts.png") no-repeat;
  background-size: 1035px auto;
  background-position: center 80px;
}
.main3 .main3_title {
  text-align: center;
  font-size: 30px;
  font-weight: bold;
  color: #333;
  letter-spacing: 7px;
  margin-bottom: 40px;
  display: block;
}
.main3 .main3_content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.main3 .main3_content .main3_content_item {
  background: #fff;
  height: 400px;
  width: 24%;
  border-radius: 10px;
  -webkit-box-shadow: 1px 1px 3px #d2d2d2;
          box-shadow: 1px 1px 3px #d2d2d2;
}
.main3 .main3_content .main3_content_item img {
  width: 98px;
  display: block;
  margin-left: 78px;
  margin-top: 32px;
  margin-bottom: 20px;
}
.main3 .main3_content .main3_content_item .main3_content_item_title {
  text-align: center;
  font-size: 22px;
  margin-bottom: 25px;
  font-weight: bold;
  display: block;
}
.main3 .main3_content .main3_content_item .main3_content_item_small span {
  text-align: center;
  font-size: 18px;
  color: #666666;
  margin-bottom: 13px;
  display: block;
}

.main4 {
  width: 1200px;
  margin: 0 auto;
  padding: 130px 0 50px;
  background: url("../images/learn-11-main4_fonts.png") no-repeat;
  background-size: 1035px auto;
  background-position: center 80px;
}
.main4 .main4_title {
  text-align: center;
  font-size: 30px;
  font-weight: bold;
  color: #333;
  letter-spacing: 7px;
  margin-bottom: 40px;
}
.main4 .main4_content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: start;
      -ms-flex-pack: start;
          justify-content: flex-start;
}
.main4 .main4_content .main4_content_item {
  width: 17.5%;
  margin-right: 3%;

  border-radius: 10px;
  padding: 10px 0 15px;
  margin-bottom: 40px;
}
.main4 .main4_content .main4_content_item img {
  display: block;
  width: 95%;
  margin: 0 auto 10px;
}
.main4 .main4_content .main4_content_item .main4_content_item_small {
  
  color: #333;
  font-size: 16px;
  width: 95%;
  margin: 0 auto;
  display: block;
  text-align: center;
}
.main4 .main4_content .main4_content_item .main4_content_item_big {
  font-size: 18px;
  color: #333;
  text-align: center;
  width: 95%;
  margin: 0 auto;
   display: block;
}
.main4 .main4_content .main4_content_item:nth-child(5n) {
  margin-right: 0px;
}