.hd-slider {
  margin: 0;
  background-image: url("images/iot/sdi-bg.png");
  background-size: 100% 100vh;
  background-repeat: no-repeat;
}

.col-left {
  padding-top: 150px;
}

.col-right {
  padding-left: 40px;
}

.col-right .i-list {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.col-right .i-item {
  background-color: #ffffff;
  width: 456px;
  height: 120px;
  border-radius: 5px;
  margin-top: 17px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.col-right .i-item img {
  width: 52px;
  height: 52px;
  margin: auto 40px;
}

.col-right .i-item p {
  font-weight: bold;
  font-size: 18px;
  margin-bottom: 10px;
}

.tab {
  display: flex;
  justify-content: center;
}

.tab .text-tab {
  height: 80px;
  margin: 0 50px;
}

.tab .text-tab:hover div {
  display: block;
}

.tab .text-tab span {
  cursor: pointer;
  font-size: 18px;
  color: #9daac0;
}

.tab .text-tab span:hover {
  color: #fc6034;
}

.tab .text-tab div {
  display: none;
  margin: 4px auto;
  background-color: #fc6034;
  height: 8px;
  width: 40px;
}

.chat-list {
  width: 284px;
  height: 199px;
  background: #ffffff;
  text-align: left;
  padding: 22px 24px 0px 24px;
}
.chat-list h4 {
  padding-left: 22px;
  line-height: 40px;
}
.chat-list p {
  height: 58px;
  line-height: 20px;
  margin-bottom: 10px;
}
.anli-box {
  width: 1200px;
  height: 344px;
  background: #ffffff;
  border: 1px solid #b9b9b9;
  padding: 45px 50px 45px 67px;
  display: flex;
  justify-content: space-between;
}
.anli-box img {
  width: 471px;
  height: 254px;
  border: 1px solid #b9b9b9;
}
.anli-demo {
  max-width: 1200px;
  text-align: center;
  margin: 0 auto;
}
.anli-demo-button {
  font-size: 16px;
  background: #2472fb;
  border-radius: 24px;
  color: #fff;
  margin-top: 10px;
  width: 138px;
}