.banner {
  width: 100%;
  height: 500px;
}
.banner > div {
  display: none;
}
.banner-pic {
  width: 100%;
  height: 500px;
  background: url("../images/cloud-banner.webp") no-repeat center top;
}
.container {
  width: 100%;
  margin: 0 auto;
}

section:nth-child(2) {
  background-color: #f1f2f5;
}
/*section:nth-child(3) {
  width: 100%;
  height: 440px;
  margin: 0 auto;
  background: url("../images/practice.jpg") no-repeat center top;
}*/
section:nth-child(3) {
  padding: none !important;
  background-color: #f7f9fb;
}
section:nth-child(4) {
  width: 100%;
  margin: 0 auto;
  position: relative;
}
.w-1200 {
  padding: 50px 0;
  width: 1200px;
  margin: 0 auto;
}
.cloud-title {
  margin: 0 0 60px;
}
.cloud-title h1 {
  font-size: 30px;
  font-weight: 600;
  color: #333;
  text-align: center;
}
.item-box {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.cloud-item {
  border: 2px solid #fff;
  position: relative;
  background-color: #f4f8fb;
  width: 275px;
  height: 300px;
  margin-right: 30px;
  box-shadow: 0 0 15px 1px #ecedf0;
  border-radius: 10px;
  padding: 20px;
  box-sizing: border-box;
  transform: translateY(0);
  overflow: hidden;
  transition: all 0.2s;
}
.cloud-item:hover {
  transform: translateY(-10px);
}
.cloud-item:last-child {
  margin-right: 0px;
}
.item-title {
  margin-bottom: 20px;
}
.item-title h3 {
  font-size: 20px;
  color: #333;
  font-weight: 600;
}
.item-title i {
  position: relative;
  display: block;
  width: 20px;
  height: 20px;
  background: url("../images/right-icon.png") no-repeat center top;
}
.item-p p {
  line-height: 30px;
  font-size: 16px;
  color: #666;
  text-align: justify;
}
.item-p p:nth-child(2) {
  display: flex;
  align-items: center;
}
.item-p p:nth-child(2) img {
  margin-right: 5px;
}
.item-p p:nth-child(2) span {
  margin-right: 30px;
}
.item-box > div .item-background:hover {
  opacity: 1;
}
.item-box > div .item-background {
  box-sizing: border-box;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-size: 370px 148px !important;
  transition: opacity ease-out 0.3s;
  opacity: 0.4;
}
.item-box > div:nth-child(1) .item-background {
  background: url("../images/cloud-item1.png") no-repeat center bottom;
}
.item-box > div:nth-child(2) .item-background {
  background: url("../images/cloud-item2.png") no-repeat center bottom;
}
.item-box > div:nth-child(3) .item-background {
  background: url("../images/cloud-item3.png") no-repeat center bottom;
}
.item-box > div:nth-child(4) .item-background {
  background: url("../images/cloud-item4.png") no-repeat center bottom;
}

.solution-top {
  position: relative;
  z-index: 10;
  padding-bottom: 10px;
}
.solution-top .solution-bg {
  position: absolute;
  bottom: 0;
  right: 0;
  z-index: -10;
}
.solution-item {
  padding: 25px 30px;
  box-sizing: border-box;
  width: 398px;
  height: 150px;
  border: 2px solid #fff;
  background-color: #f1f2f5; /* 不支持线性的时候显示 */
  background-image: linear-gradient(to right, #f1f2f5, #ffffff);
  box-shadow: 0 0 15px 1px #ecedf0;
  cursor: pointer;
}
.solution-item:hover .item-title h3 {
  color: #0028c9;
}

.solution-item:hover .item-title i {
  background: url("../images/right-icon-b.png") no-repeat center top;
  animation: i-active 2s infinite;
}
@keyframes i-active {
  0% {
    left: 0px;
  }
  50% {
    left: 15px;
  }
  100% {
    left: 0px;
  }
}
.solution-item .item-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.practice h1 {
  color: #fff;
}
.practice-item {
  box-sizing: border-box;
  width: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 25px 12px;
  border-radius: 10px;
  background-color: #f1f2f5; /* 不支持线性的时候显示 */
  background-image: linear-gradient(to right bottom, #f1f2f5, #ffffff);
}
.practice-item > img {
  margin-bottom: 15px;
}
.product-item {
  padding: 25px;
  position: relative;
  box-sizing: border-box;
  border-radius: 10px;
  width: 275px;
  height: 150px;
  border: 2px solid #fff;
  background-color: #f1f2f5;
  background-image: linear-gradient(to right, #f1f2f5, #ffffff);
  box-shadow: 0 0 15px 1px #ecedf0;
  transform: translateY(0);
  overflow: hidden;
  transition: all 0.2s;
}

.product-item .item-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
}
.product-item .item-title h3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.product-item .item-title h3 img {
  margin-right: 10px;
}
.product-item:hover {
  /* transform:translateY(-10px); */
  transform: scale(1.1);
  cursor: pointer;
}
.product-item:hover .item-title i {
  background: url("../images/right-icon-b.png") no-repeat center top;
  animation: i-active 2s infinite;
}
.product-item:hover .item-title h3 {
  color: #0028c9;
}
.product .item-box > div:nth-child(1) span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon1.png") no-repeat center center;
}
.product .item-box > div:nth-child(1):hover span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon1-b.png") no-repeat center center;
}
.product .item-box > div:nth-child(2) span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon2.png") no-repeat center center;
}
.product .item-box > div:nth-child(2):hover span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon2-b.png") no-repeat center center;
}
.product .item-box > div:nth-child(3) span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon3.png") no-repeat center center;
}
.product .item-box > div:nth-child(3):hover span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon3-b.png") no-repeat center center;
}
.product .item-box > div:nth-child(4) span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon4.png") no-repeat center center;
}
.product .item-box > div:nth-child(4):hover span {
  width: 24px;
  height: 24px;
  background: url("../images/pro-icon4-b.png") no-repeat center center;
}
.bottom {
  width: 100%;
  background-color: #21252e;
  margin: 0 auto;
}
.bottom video {
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  z-index: -10;
  background-color: #f7f9fb;
}
.bottom-box {
  width: 1200px;
  height: 100px;
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  margin: auto;
}
.bottom-box .bottom-h {
  font-size: 30px;
  font-weight: 500;
  color: #fff;
  margin-bottom: 20px;
}
.bottom-box .bottom-p {
  font-size: 18px;
  color: #fff;
}
button {
  width: 140px;
  height: 40px;
  border-radius: 5px;
  margin-top: 40px;
  color: #0028c9;
  font-size: 16px;
}
.none {
  position: absolute;
  top: 400px;
}