.algorithm_main {
  padding: 40px 0;
  background: url('../images/75b4f16c.png') no-repeat -200px center / auto 20%, url('../images/75b4f16c9.png') no-repeat 124% 200px / auto 30%;
}
.algorithm_main h3 .img {
  width: 390px;
  height: 28px;
  background: url('../images/logo_title.png') no-repeat center;
  margin-top: 12px;
}
.algorithm_main h3 {
  font-size: 30px;
  font-weight: 400;
  margin: 0 0 45px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.algorithm_center {
  width: 1200px;
  margin: 0 auto;
  box-sizing: border-box;
  margin-top: 20px;
  padding-bottom: 40px;
  position: relative;
}
.algorithm_center .bg_player {
  position: absolute;
  width: 448px;
  top: 0;
  bottom: 0;
  left: 750px;
  z-index: -1;
  background: url('../images/1346.png') no-repeat 100px center;
}
.algorithm_center .bg_player_left {
  position: absolute;
  width: 448px;
  top: 0;
  bottom: 0;
  left: -300px;
  z-index: -1;
  background: url('../images/1347.png') no-repeat 0px center / auto 80%;
}
.algorithm_center .feature_list{
  display: flex;
  flex-wrap: wrap;
  margin: -12px;
}
.algorithm_center .feature_list .feature_it{
  width: 20%;
  padding: 12px;
  box-sizing: border-box;
  cursor: pointer;
  position: relative;
}

.algorithm_center .feature_list .feature_it .feature_it_bg{
  background: url('../images/kouz.png') no-repeat center center / 100% 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  height: 120px;
  padding-left: 20px;
}
.algorithm_center .feature_list .feature_it .mask{
  position: absolute;
  z-index: 1;
  left: 12px;
  top: 12px;
  bottom: 12px;
  right: 12px;
  background: rgba(0, 0, 0, 0.5);
}
.algorithm_center .feature_list .feature_it svg {
  position: relative;
  z-index: 4;
}
.algorithm_center .feature_list .feature_it h3{
  font-size: 16px;
  margin: 0;
  padding: 0;
  color: #fff;
  position: relative;
  z-index: 4;
}
.algorithm_center .feature_list .feature_it:hover h3 {
  font-weight: 600;
}
.algorithm_center .feature_list .feature_it:hover .feature_it_bg {
  font-weight: 600;
  background-size: 120% 120% !important;
  transition: all 0.5s;
}