.sec:nth-child(2n) {
  background: #F9FAFF;
}

.sec .btn-solid {
  margin: 40px auto;
}

.sec1 .item {
  width: 280px;
  height: 400px;
  background-clip: padding-box, border-box;
  background-origin: padding-box, border-box;
  background-image: linear-gradient(0deg, #fff, #fff), linear-gradient(0deg, #1372F4, #65ADFF);
  border: solid 1px transparent;
  border-radius: 10px;
  float: left;
  margin-right: 26px;
  padding: 0 19px;
}

.sec1 .item:nth-child(4n) {
  margin-right: 0;
}

.sec1 .item .img-box {
  width: 100%;
  height: 200px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sec1 .item .title {
  font-size: 20px;
  color: #333;
  font-weight: 600;
  text-align: center;
}

.sec1 .item .desc {
  font-size: 14px;
  line-height: 26px;
  color: #666;
  margin-top: 20px;
}

.sec2 .item {
  width: 590px;
  height: 240px;
  border-radius: 10px;
  margin-right: 20px;
  margin-top: 20px;
  float: left;
  padding: 40px 40px 0;
}

.sec2 .item:nth-child(1) {
  margin-top: 0;
  color: #fff;
  background: url(../image/sec2_01.png) no-repeat center/cover;
}

.sec2 .item:nth-child(2) {
  margin-top: 0;
  margin-right: 0;
  color: #333;
  background: url(../image/sec2_02.png) no-repeat center/cover;
}

.sec2 .item:nth-child(3) {
  color: #333;
  background: url(../image/sec2_03.png) no-repeat center/cover;
}

.sec2 .item:nth-child(4) {
  margin-right: 0;
  color: #fff;
  background: url(../image/sec2_04.png) no-repeat center/cover;
}

.sec2 .item .title {
  font-size: 22px;
  font-weight: 600;
  text-align: center;
}

.sec2 .item .desc {
  font-size: 18px;
  margin-top: 50px;
  line-height: 40px;
}

.sec3 {
  text-align: center;
}

.sec3 .sec-content img {
  width: 1021px;
}

.sec4 .item {
  width: 360px;
  height: 440px;
  border-radius: 10px;
  margin-right: 60px;
  float: left;
  padding: 0 20px;
}

.sec4 .item:nth-child(1) {
  background: url(../image/sec4_01.png) no-repeat center/cover;
}

.sec4 .item:nth-child(2) {
  background: url(../image/sec4_02.png) no-repeat center/cover;
}

.sec4 .item:nth-child(3) {
  margin-right: 0;
  background: url(../image/sec4_03.png) no-repeat center/cover;
}

.sec4 .item .title {
  height: 83px;
  border-bottom: solid 1px #1372F4;
  line-height: 83px;
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  color: #333;
}

.sec4 .item .desc {
  padding-top: 20px;
  font-size: 16px;
  color: #666;
  line-height: 50px;
  text-align: center;
}