.banner {
	width: 100%;
}

.banner img {
	display: block;
	width: 100%;
}

.main {
	background-color: #f4f4f4;
	padding-bottom: 100px;
	padding-top: 100px;
}

.main .product .item1 {
  display: flex;
  flex-flow: row nowrap;
  justify-content: space-between;
}

.main .product .item1 .l,
.main .product .item1 .r {
  width: 50%;
}

.main .product .item1 .l img {
  display: block;
  width: 100%;
}

.main .product .item1 .r {
  box-sizing: border-box;
  padding: 0 60px;
  background-color: #ffffff;
}

.main .product .item1 .r h2.title {
  font-size: 30px;
  font-weight: bold;
  color: #222222;
  line-height: 110px;
  border-bottom: 1px solid #e7e7e7;
  padding-top: 20px;
}

.main .product .item1 .r ul.parameter {
  padding-top: 40px;
}

.main .product .item1 .r ul.parameter li::after {
  display: table;
  content: "";
  clear: both;
}

.main .product .item1 .r ul.parameter li h5 {
  float: left;
  font-size: 20px;
  font-weight: bold;
  color: #ffa229;
  line-height: 60px;
  width: 4em;
  text-align-last:justify;
  text-align:justify;
}

.main .product .item1 .r ul.parameter li span {
  float: left;
  font-size: 20px;
  font-weight: bold;
  color: #ffa229;
  line-height: 60px;
}

.main .product .item1 .r ul.parameter li p {
  float: left;
  font-size: 20px;
  font-weight: 500;
  color: #222222;
  line-height: 60px;
}

.main .product .item2 {
  padding-bottom: 100px;
  border-bottom: 1px solid #e1e1e1;
}

.main .product .item2 ul.article_typelist {
  display: flex;
  flex-flow: row nowrap;
  justify-content: space-between;
  margin-top: 60px;
}

.main .product .item2 ul.article_typelist li {
  width: 50%;
  margin: 0 0.5px;
  font-size: 18px;
  color: #ffffff;
  text-align: center;
  line-height: 72px;
  background-color: #222222;
  cursor: pointer;
}

.main .product .item2 ul.article_typelist li.active {
  background-color: #ffa229;
}

.main .product .item2 ul.article_list li {
  width: 100%;
  box-sizing: border-box;
  padding: 0 60px;
  background-color: #ffffff;
  display: none;
  padding-top: 30px;
  padding-bottom: 50px;
}

.main .product .item2 ul.article_list li:first-child {
  display: block;
}

.main .product .item2 ul.article_list li p {
  font-size: 16px;
  color: #666666;
  line-height: 34px;
  padding-top: 20px;
}

.main .product .item2 ul.article_list li h5 {
  font-size: 16px;
  color: #222222;
  line-height: 34px;
  font-weight: bold;
  padding-top: 20px;
}

.main .article_page {
	padding-top: 60px;
	display: flex;
	flex-flow: row nowrap;
	justify-content: space-between;
}

.main .article_page a.infolist2 {
	display: block;
	width: 184px;
	height: 54px;
	box-sizing: border-box;
	border: 1px solid #cccccc;
	font-size: 16px;
	color: #222222;
	text-align: center;
	line-height: 54px;
}

.main .article_page a.return {
	width: 184px;
	height: 54px;
	display: block;
	font-size: 16px;
	color: #ffffff;
	text-align: center;
	line-height: 54px;
	margin: 0 auto;
  cursor: pointer;
  background-color: #ffa229;
}

@media screen and (max-width: 550px) {

  .main {
    padding-top: 20px;
    padding-bottom: 70px;
  }

  .main .product .item1 {
    flex-flow: row wrap;
  }

  .main .product .item1 .l, .main .product .item1 .r {
    width: 100%;
  }

  .main .product .item1 .r {
    padding: 0 10px;
  }

  .main .product .item1 .r h2.title {
    font-size: 24px;
    line-height: 56px;
    padding-top: 10px;
  }

  .main .product .item1 .r ul.parameter {
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .main .product .item1 .r ul.parameter li h5 {
    font-size: 16px;
    line-height: 40px;
  }

  .main .product .item1 .r ul.parameter li span {
    font-size: 16px;
    line-height: 40px;
  }

  .main .product .item1 .r ul.parameter li p {
    font-size: 16px;
    line-height: 40px;
  }

  .main .product .item2 {
    padding-bottom: 20px;
  }

  .main .product .item2 ul.article_typelist {
    margin-top: 20px;
  }

  .main .product .item2 ul.article_typelist li {
    font-size: 16px;
    line-height: 56px;
  }

  .main .product .item2 ul.article_list li {
    padding: 10px 10px;
  }

}