.sec1 .item {
  width: 595px;
  height: 200px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 25px 0 40px;
  transition: all .5s;
  cursor: pointer;
}

.sec1 .item:hover {
  transform: translateY(-2px);
  box-shadow: 2px 7px 8px 0px rgba(25, 34, 45, 0.27);
}

.sec1 .item:nth-child(1) {
  background: linear-gradient(90deg, #408CFC, #3E60DA);
  margin-right: 10px;
}

.sec1 .item:nth-child(2) {
  background: linear-gradient(-90deg, #5198FF, #8BC6FC);
}

.sec1 .item:nth-child(3) {
  background: linear-gradient(-90deg, #5198FF, #8BC6FC);
  margin-right: 10px;
  margin-top: 20px;
}

.sec1 .item:nth-child(4) {
  background: linear-gradient(90deg, #408CFC, #3E60DA);
  margin-top: 20px;
}

.sec1 .item .title {
  font-size: 28px;
  color: #fff;
  line-height: 28px;
  font-weight: 600;
}

.sec1 .item .desc {
  font-size: 18px;
  line-height: 30px;
  color: #fff;
  margin-top: 20px;
}

.sec1 .btn-hollow {
  width: 368px;
  margin: 50px auto 0;
  font-size: 16px;
}

.sec2 {
  padding-bottom: 0;
  background: #F9FAFF;
}

.sec2 .tab-header {
  border-bottom: solid 1px rgba(0, 75, 225, .5);
  position: relative;
}

.sec2 .tab-header .item {
  width: 25%;
  font-size: 28px;
  color: #333;
  padding-bottom: 22px;
  cursor: pointer;
  text-align: center;
}

.sec2 .tab-header .reaction-bottom-dot {
  display: block;
  width: 56px;
  height: 6px;
  background: linear-gradient(90deg, #4591FF 0%, #004BE1 100%);
  border-radius: 6px 6px 0px 0px;
  position: absolute;
  bottom: 0;
  left: 150px;
  transform: translateX(-50%);
  -webkit-transition: all .3s ease;
  -moz-transition: all .3s ease;
  transition: all .3s ease;
}

.sec2 .tab-body .item {
  display: none;
  height: 510px;
}

.sec2 .tab-body .item.active {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sec2 .tab-body .text-box {
  width: 520px;
  height: 320px;
  background: rgba(0, 75, 225, .05);
  border-radius: 20px;
  padding: 51px 33px 45px 45px;
  
}

.sec2 .tab-body .text-box .title {
  font-size: 28px;
  color: #333;
  line-height: 28px;
}

.sec2 .tab-body .text-box .desc {
  height: 110px;
  font-size: 18px;
  line-height: 30px;
  margin-top: 15px;
  color: #666;
}

.sec2 .tab-body .text-box .btn-solid {
  width: 180px;
  margin-top: 20px;
}

.sec2 .tab-body .img-box {
  width: 50%;
  text-align: center;
}


.sec3 .item {
  margin-right: 90px;
  margin-top: 50px;
  transition: all .5s;
  cursor: pointer;
}

.sec3 .item:hover {
  transform: translateY(-2px);
  box-shadow: 2px 7px 8px 0px rgba(25, 34, 45, 0.27);
}

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

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

.sec3 .item img {
  width: 340px;
  height: 166px;
  border-radius: 10px 10px 0 0;
}

.sec3 .item .text-box {
  width: 340px;
  padding: 29px;
  text-align: center;
  border-radius: 0 0 10px 10px;
  background: #F9FAFF;
}

.sec3 .item .title {
  font-size: 28px;
  font-weight: 500;
  color: #333;
  line-height: 28px;
}

.sec3 .item .desc {
  font-size: 16px;
  color: #666;
  margin-top: 19px;
  line-height: 16px;
}

.sec4 {
  background: #F9FAFF;
}

.sec4 .item {
  width: 25%;
  text-align: center;
  float: left;
  margin-top: 36px;
}

.sec4 .item:nth-child(-n+4) {
  margin-top: 0;
}

.sec4 .item .img-box .img {
  width: 58px;
  height: 58px;
}

.sec4 .item .title {
  font-size: 28px;
  color: #333;
  line-height: 28px;
  margin-top: 18px;
}

.sec4 .item .desc {
  font-size: 16px;
  color: #666;
  line-height: 16px;
  margin-top: 18px;
}

.sec4 .btn-box {
  margin-top: 50px;
  text-align: center;
}

.sec4 .btn-box .btn-solid {
  width: 175px;
  vertical-align: middle;
}

.sec4 .btn-box .btn-hollow {
  margin-left: 23px;
  vertical-align: middle;
}