.title {
  margin-top: 42px;
  margin-bottom: 37px;
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 18px;
  line-height: 18px;
  letter-spacing: 4px;
  color: #666666;
}
/*  */
.difficulty,
.scheme,
.modules,
.case,
.merit {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 1280px;
}
/*  */

.difficulty_content {
  width: 100%;
  position: relative;
  margin-top: 78px;
  margin-bottom: 60px;
}
.difficulty_img {
}
.difficulty_list {
  position: absolute;
  left: 520px;
  top: 40px;
  background-color: #f4f4f4;
  padding: 20px;
}
.difficulty_list li {
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 16px;
  line-height: 22px;
  letter-spacing: 1px;
  color: #333333;
}
.difficulty_list li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: #333;
  transform: rotate(45deg);
  margin-right: 6px;
  vertical-align: middle;
}
/*  */
.scheme {
  background-color: #f2f2f6;
  padding-top: 72px;
  padding-bottom: 66px;
  width: 100%;
}
.scheme_content {
  margin-top: 66px;
  width: 1280px;
  display: flex;
  justify-content: space-between;
}
.scheme_content li {
  width: 240px;
  height: 140px;
  background: #fff;
  padding: 0 20px;
  padding-top: 26px;
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 16px;
  line-height: 18px;
  text-align: center;
}
/*  */
.modules {
  margin: 60px 0;

}
.modules_content {
  width: 100%;
  margin-top: 80px;
}
.modules_list {
  background-color: #e9eef8;
  border-radius: 6px;
  padding: 10px 0;
  padding-left: 70px;
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}
.modules_list h4 {
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 18px;
  letter-spacing: 0px;
  color: #ffffff;
  border-radius: 20px;
  border: solid 2px #d9d9d9;
  width: 126px;
  height: 40px;
  margin: 0;
  margin-right: 85px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.modules_list span {
  display: inline-block;
  width: 160px;
  line-height: 30px;
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 16px;
  color: #3e3a39;
}
/*  */
.case {
  margin-bottom: 55px;
}
.demo_content {
  display: flex;
  width: 100%;
  justify-content: space-between;
  margin-top: 70px;
}
.demo_list {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.demo_list span {
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 16px;
  line-height: 16px;
  color: #666666;
}
.demo_img {
  box-shadow: 0 0 10px #ccc;
  margin-bottom: 15px;
}
/*  */
.merit{
    margin-bottom: 70px;
}
.merit_content{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 75px;
}
.merit_list {
  width: 600px;
  height: 150px;
  padding-left: 25px;
  padding-right: 20px;
   padding-top: 15px;
  background-color: #f4f4f4;
  border: solid 1px #d8d8d8;
  margin-bottom: 15px;
}
.merit_list h5 {
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 16px;
  line-height: 22px;
  font-weight: bold;
  color: #333333;
}
.merit_list p {
  font-family: "AlibabaPuHuiTi-Regular";
  font-size: 16px;
  line-height: 22px;
  color: #666666;
}