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

.sec .btn-solid {
  display: block;
  margin: 66px auto 0;
}

.sec {
  overflow: hidden;
}

.sec1 .item-box1 {
  width: 1200px;
  margin: auto;
}

.sec1 .item-box2 {
  width: 1600px;
  position: relative;
  left: 50%;
  transform: translateX(-50%)
}

.sec1 .item {
  width: 385px;
  height: 140px;
  border: 1px solid #90B4F7;
  border-radius: 10px;
  margin-right: 20px;
  margin-top: 20px;
  float: left;
  padding: 22px 30px 26px;
}

.sec1 .item:nth-child(2n) {
  background: linear-gradient(to right, #E2EDFF, #FFFFFF);
}

.sec1 .item-box1 .item {
  margin-top: 0;
}

.sec1 .item:last-child {
  margin-right: 0;
}

.sec1 .item-box2 .item:first-child {
  background-clip: padding-box, border-box;
  background-origin: padding-box, border-box;
  background-image: linear-gradient(90deg, #fff, #fff), linear-gradient(90deg, #fff, #90B4F7);
  border: 1px transparent solid;
}

.sec1 .item-box2 .item:last-child {
  background-clip: padding-box, border-box;
  background-origin: padding-box, border-box;
  background-image: linear-gradient(90deg, #E2EDFF, #fff), linear-gradient(90deg, #90B4F7, #fff);
  border: 1px transparent solid;
}

.sec1 .item .title {
  color: #333;
  font-size: 20px;
  line-height: 24px;
}

.sec1 .item .desc {
  margin-top: 3px;
  color: #666;
  line-height: 24px;
  font-size: 16px;
}

.sec2 .item {
  width: 280px;
  height: 300px;
  margin-right: 26px;
  float: left;
  text-align: center;
  padding-top: 56px;
  border: 1px solid #E5E5E5;
  border-radius: 10px;
}

.sec2 .item:nth-child(2n) {
  background: linear-gradient(to bottom, #E3EDFF, #fff);
}

.sec2 .item:nth-child(4n) {
  margin-right: 0px;
}

.sec2 .item img {
  width: 140px;
}

.sec2 .item .title {
  font-size: 18px;
  color: #666;
  margin-top: 43px;
  font-weight: 600;
}

.sec3 .item {
  width: 385px;
  margin-right: 22px;
  margin-top: 22px;
  border: 1px solid #E5E5E5;
  border-radius: 10px;
  overflow: hidden;
  float: left;
  cursor: pointer;
}

.sec3 .item:nth-child(-n+3) {
  margin-top: 0px;
}

.sec3 .item:nth-child(3n) {
  margin-right: 0px;
}

.sec3 .item .title {
  width: 100%;
  height: 80px;
  border-bottom: solid 1px #e5e5e5;
  text-align: center;
  line-height: 79px;
  font-size: 20px;
  color: #333;
  font-weight: 600;
}

.sec3 .item .desc {
  width: 100%;
  height: 170px;
  padding-left: 28px;
  padding-top: 38px;
  font-size: 18px;
  color: #666;
  background: linear-gradient(0deg, #E4EDFF 0%, #FFFFFF 100%);
}