.know-item {
  text-align: justify;
  font-size: 18px;
  line-height: 40px;
}
.know-step {
  display: flex;
  margin: 30px auto;
}
.know-step .step-item {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 190px;
  border-left: 1px solid #784008;
  background-color: #ab7038;
  cursor: pointer;
}
.know-step .step-item:first-child {
  border-left: 0;
}
.know-step .step-item img {
  display: block;
  margin-bottom: 15px;
  height: 80px;
}
.know-step .step-item p {
  color: #fff;
  text-align: center;
  font-size: 20px;
}
.know-step .step-item-on {
  position: relative;
  background-color: #784008;
}
.know-step .step-item-on:before {
  position: absolute;
  top: 0;
  left: 50%;
  margin-left: -30px;
  width: 0;
  height: 0;
  border-width: 14px 30px 0 30px;
  border-style: solid;
  border-color: #fff transparent transparent transparent;
  content: '';
}
.know-step .step-item-on:after {
  position: absolute;
  bottom: 0;
  width: 100%;
  height: 6px;
  background-color: #414141;
  content: '';
}
.know-step-content {
  margin-bottom: 100px;
  padding: 30px;
  padding-top: 0;
  font-size: 18px;
  line-height: 36px;
}
.know-step-content img {
  display: block;
  margin: 20px auto;
}
.know-step-content .step-content-item {
  display: none;
}
.know-step-content .step-content-item-on {
  display: block;
}