.nav_main {
  position: fixed;
  margin-left: 1000px;
  background-color: #fff;
  padding: 50px;
  width: 100px;
}

.nav_list {
  position: relative;
  margin-top: 0;
}

.nav_list:before {
  display: inline-block;
  height: calc(100% - 19px);
  margin-top: 9px;
  content: "";
  width: 2px;
  position: absolute;
  left: -28px;
  background-color: #e1e1e1;
}

.nav_list .cate-item1 {
  display: block;
  font-size: 16px;
  font-weight: bold;
  color: #0e337a;
  line-height: 30px;
  position: relative;
}

.nav_list {
  position: relative;
}

.nav_list .cate-item1:before {
  display: inline-block;
  content: "";
  width: 12px;
  height: 12px;
  position: absolute;
  left: -33px;
  top: 9px;
  background: url("https://pres.vobao.com/Images/V3/cpjhy/jgsz22.png") no-repeat center;
}

.nav_list .cate-item1 {
  display: block;
  color: #333;
}

.nav_list .cate-item1.active {
  display: block;
  color: #ff6f6f;
}

.nav_list .cate-item1.active:before {
  display: block;
  content: "";
  width: 28px;
  height: 16px;
  background: url("https://pres.vobao.com/Images/V3/cpjhy/pyb.png") no-repeat;
  position: absolute;
  left: -36px;
  top: 8px;
}

.nav_list .cate-item2 {
  font-size: 14px;
  color: #555555;
  line-height: 30px;
  position: relative;
}

.nav_list .cate-item2:before {
  display: inline-block;
  content: "";
  width: 12px;
  height: 12px;
  position: absolute;
  left: -33px;
  top: 9px;
  background: url("https://pres.vobao.com/Images/V3/cpjhy/jgsz.png") no-repeat center;
}

.nav_list.cate-item1.cate-item2 {
  color: #555555;
}

.nav_list .cate-item2.active:before {
  display: block;
  content: "";
  width: 28px;
  height: 16px;
  background: url("https://pres.vobao.com/Images/V3/cpjhy/pyb.png") no-repeat;
  position: absolute;
  left: -40px;
  top: 8px;
}