.block_2 {
  height: 203px;
  margin: 0 auto;
  background-color: #ececec;
}
.block_2 .brief {
  width: 1000px;
  height: 203px;
  margin: 0 auto;
  position: relative;
}
.block_2 .brief_title {
  width: 1000px;
  height: 203px;
  margin: 0 auto;
  position: absolute;
  background: url(../images/brief.jpg?1) center top no-repeat;
  background-size: cover;
}
/*.block_2 .brief .brief_content{width:1000px; height:227px; margin:0 auto; background:url(../images/brief.jpg)center top no-repeat; background-size:cover;}*/
.block_3 {
  padding: 50px 0px 40px 0px; /*background:url(../images/content_bg.jpg)center top no-repeat;*/
  background-color: #fff;
}
.block_3 .constr {
  width: 1000px;
  margin: 0 auto;
}
.block_3 .constr ul {
  width: 1030px;
  overflow: hidden;
  display: none;
}
.block_3 .constr ul.active {
  display: block;
}
.block_3 .constr ul li {
  width: 313px;
  height: 295px;
  overflow: hidden;
  background: url(../images/li_bg.jpg) center top no-repeat;
  float: left;
  position: relative;
  margin-right: 30px;
}
.block_3 .constr ul li img {
  width: 290px;
  height: 170px;
  margin-top: 11px;
  margin-left: 10px;
}
.block_3 .constr ul li i.i_video {
  width: 80px;
  height: 80px;
  background: url(../images/playIcon.png) center top no-repeat;
  background-size: cover;
  position: absolute;
  top: 88px;
  left: 20px;
}
.wj_title {
  width: 235px;
  height: 50px;
  margin-left: 40px;
  margin-top: 40px;
  font-size: 18px;
  color: #333;
  overflow: hidden;
}

.block_3 .tab {
  display: flex;
  width: 1030px;
  margin: 0 auto 40px;
  flex-wrap: wrap;
}
.block_3 .tab .item {
  padding: 0 55px;
  height: 50px;
  text-align: center;
  line-height: 50px;
  background: #ffffff;
  color: #999999;
  border-bottom: 2px solid #999999;
}
.block_3 .tab .item.active {
  background: #e8e4e0;
  color: #6d3a03;
  border-bottom: 2px solid #6d3a03;
}

/*.block_2{FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#fa741c,endColorStr=#fb802f); IE 6 7 8 
background: -ms-linear-gradient(top, #fa741c,  #fb802f);         IE 10 
background:-moz-linear-gradient(top,#fa741c,#fb802f);火狐 
background:-webkit-gradient(linear, 0% 0%, 0% 100%,from(#fa741c), to(#fb802f));谷歌 
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#fa741c), to(#fb802f));       Safari 4-5, Chrome 1-9
background: -webkit-linear-gradient(top, #fa741c, #fb802f);   Safari5.1 Chrome 10+
background: -o-linear-gradient(top, #fa741c, #fb802f);  Opera 11.10+}

.block_3{FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#fb802f,endColorStr=#fdd0b2); IE 6 7 8 
background: -ms-linear-gradient(top, #fb802f,  #fdd0b2);         IE 10 
background:-moz-linear-gradient(top,#fb802f,#fdd0b2);火狐 
background:-webkit-gradient(linear, 0% 0%, 0% 100%,from(#fb802f), to(#fdd0b2));谷歌 
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#fb802f), to(#fdd0b2));       Safari 4-5, Chrome 1-9
background: -webkit-linear-gradient(top, #fb802f, #fdd0b2);   Safari5.1 Chrome 10+
background: -o-linear-gradient(top, #fb802f, #fdd0b2);  Opera 11.10+}*/

.footer {
  background-color: #fff;
}