.essence_content{
   width: 1000px;
   margin: 0 auto;
    height:222px;
}
.essence_content ul li{
    /*display: inline-block;*/
    float: left;
    width: 23%;
    text-align: center;
    /*margin:  0 auto;*/
    margin-left: 15px;

}
.essence_content ul{
    width: 100%;
    padding: 20px 0px;
}
.essence_title{
    height:136px;
    line-height: 136px;
}
.essence_wrapper_title{
    width: 1000px;
    margin: 0 auto;
    height:165px;
    /*line-height: 2;*/
}
.essence_wrapper_title_son  p {
    text-align: center;
}
.essence_wrapper_title_son_b{
   color:#979797;
   font-size: 18px;
    margin-top: 10px;
}
.essence_wrapper_title_son_a{
    font-size: 30px;
}
.essence_wrapper_title_son{
  padding-top: 50px;
}
.essence_content_a{
    width: 1000px;
    margin: 0 auto;
    /*border:1px solid red;*/
    height:420px;
}
.essence_content_main,.essence_b_content_main{
    height:305px;
}
.essence_content_main div{
    cursor: pointer;
}
.essence_content_div_c{
    width: 330px;
    height:300px;
    float: left;
    border:1px solid #000000;
}

.essence_b_content{
    width: 1000px;
    margin: 0 auto;
    /*border:1px solid red;*/
    height:420px;
}
.essence_content_div_a_image_a{
    width:100%;
    height:100%;
}
.essence_content_div_c_a image{
    width: 300px;
    height:146px;
}
.essence_content_div_c_a{
    width: 300px;
    height:146px;
}
.essence_content_div_a{
   width: 328px;
    float: left;
    height:300px;
    position:relative;
}
.essence_content_div_a:first-child{
    margin-right: 8px;
}
.essence_content_div_a img{
    width:328px;
    height:300px;
    /*display: block;*/

}

.essence_content_div_b{
    width: 328px;
    height:146px;
    float: right;
    position:relative;
}
.essence_content_div_b:last-child{
  margin-top: 8px;

}
.essence_content_div_b img{
    width: 328px;
    height:146px;
    float: right;

}
.bg_color{
    background: #f3f1ec;
}

.essence-wrapper:nth-child(odd){background:#f3f1ec}
.essence-wrapper:nth-child(even){background:#fff}

.big_img_a,.small_img_a{
    position:absolute;
    right:0;
    bottom:0;
    top:0;
    left:0;
    display: none;
}
.active_li{
    box-shadow: 0 0 13px 4px #e5e5e5;
}