.banner_text {
  width: 100%;
  height: 100%;
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
}
.banner_text .v1 {
  width: 100%;
  font-size: 40px;
  text-align: center;
  margin-top: 10%;
  color: #fff;
}
.banner_text .v2 {
  width: 100%;
  font-size: 24px;
  text-align: center;
  margin-top: 8px;
  color: #fff;
}
.banner_text .v3 {
  width: 100%;
  text-align: center;
  margin-top: 10px;
}
.banner_text .v3 a {
  margin-top: 18px;
  display: inline-block;
  padding: 16px 15px;
  background: #fe7615;
  font-size: 15px;
  color: #fff;
  border-radius: 10px;
}

#page-body>.yichat_about{
  width: 100%;
  height: auto;
  margin-top: 50px;
}
.yichat_about>.content{
  width: 960px;
  height: 430px;
  margin: 0 auto;
  position: relative;
}
.yichat_about_left {
  width: 600px;
  height: 100%;
  float: left;
}
.yichat_about_left .about_title {
  width: 100%;
  height: auto;
  font-size: 30px;
  color: #333;
  margin: 80px 0 60px 0;
  text-align: center;
}
.yichat_about_left .about_content {
  width: 80%;
  height: auto;
  font-size: 15px;
  color: #333;
  margin:auto;
  text-indent: 28px;
  line-height: 25px;
  text-align: left;
} 
.yichat_about_right {
  float: left;
  width: 306px;
  height: 100%;
}
.yichat_about_right img {
  width: 306px;
  height: 100%;
}
#page-body .yichat_about.special {
  background: #f3f3f3;
  margin-top: 0;
  height: auto;
}
#page-body .yichat_about.special .content {
  height: auto
}
.special_title {
  width: 100%;
  font-size: 25px;
  color: #333;
  text-align: center;
  padding-top: 50px;
}
.special_subtitle {
  width: 100%;
  font-size: 18px;
  color: #333;
  text-align: center; 
  margin-top: 10px;
}
.special_list {
  width: 100%;
  height: auto;
  margin-top: 30px;
}
.special_list ul {
  width: 100%;
  height: auto;
}
.special_list li {
  width: 25%;
  float: left;
  height: auto;
  padding-bottom: 60px;
}
.special_list li img {
  width: 106px;
  height: 106px;
  margin: 0 auto;

}
.special_list li:nth-child(3){
  float: right;
}
.special_list li:nth-child(2){
  margin-left: 12.5%;
}
.special_list li .special_list_title {
  margin-top:20px;
  font-size: 18px;
  color: #333;
  width: 100%;
  text-align: center;
}
.special_list li .special_list_dsc {
  margin-top: 8px;
  font-size: 15px;
  line-height: 25px;
  color: #333;
  width: 86%;
  padding: 0 7%;
  text-align: left;
}
#page-body .yichat_about.introduce {
  background: #fff;
  margin-top: 0;
  height: auto;
}
#page-body .yichat_about.introduce .content {
  height: auto;
}
.introduce_list {
  width: 100%;
  height: auto;
  margin-top: 30px;
  margin-bottom: 40px
}
.introduce_list ul {
  width: 910px;
  margin: auto;
  height: auto;
}
.introduce_list li {
  width: 290px;
  height: 290px;
  float: left;
  margin-bottom: 20px;
  cursor: pointer;
}
.introduce_list li .main {
  width: 100%;
  height: 100%;
  background: #f7f7f7;
  display: block;
}
.introduce_list li:nth-child(3),.introduce_list li:nth-child(6){
  float: right;
}
.introduce_list li:nth-child(2),.introduce_list li:nth-child(5){
  margin-left: 20px;
}
.introduce_list li .main img {
  width: 106px;
  height: 106px;
  margin: 0 auto;
  padding-top: 60px; 
}
.introduce_list_title {
  width: 100%;
  margin-top: 45px;
  text-align: center;
  color: #333;
  font-size: 18px;
}
.introduce_list li .sub {
  width: 100%;
  height: 100%;
  background: #fe7615;
  display: none;
}
.introduce_list li .sub .text {
  width: 100%;
  height: 100%;
  padding: 0 35px;
  display: table;
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  -o-box-sizing: border-box;
  -ms-box-sizing: border-box;
}
.introduce_list li .sub .text span {
  font-size: 15px;
  line-height: 22px;
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  display: table-cell;
  vertical-align:middle;
  text-align:left;
 }
#page-body .yichat_about.advantage {
  background: #f3f3f3;
  margin-top: 0;
  height: auto;
}
#page-body .yichat_about.advantage .content {
  height: auto
}
.advantage_list {
  width: 100%;
  height: auto;
  margin-top: 30px;
  margin-bottom: 60px;
}
.advantage_list ul {
  width: 910px;
  height: auto;
  margin: 0 auto;
}
.advantage_list li {
  width: 210px;
  height: auto;
  float: left;
  background: #fff;
  margin-right: 20px;
}
.advantage_list li:nth-child(4) {
  margin: 0
}
.advantage_list li img {
  width: auto;
  height: 70px;
  padding-bottom: 30px;
}
.advantage_list_title {
  width: 169px;
  margin: 0 auto;
  height: auto;
}
.advantage_list_title span {
  display: inline-block;
  border-bottom: 4px solid #333;
  font-size: 20px;
  color: #333;
  line-height: 40px;
}
.advantage_list_dsc {
  width: 169px;
  margin: 0 auto;
  height: auto;
  padding: 16px 0; 
  color: #999;
  font-size: 14px
}

#page-body .yichat_about.down {
  background: #fff;
  margin-top: 20px;
  height: auto;
}
#page-body .yichat_about.down .content {
  width: 910px;
  margin: auto;
  height: 520px;
  background-image: url('http://www.cnmmsc.org/yd/resource/images/yichat/mockup_bg.png');
  background-size:910px;
}
.down .welcome {
  width: 100%;
  height: auto;
  padding-top: 180px;
  font-size: 26px;
  color: #333;
  text-align: center;
}
.down .technology {
  width: 100%;
  height: auto;
  margin-top: 10px;
  margin-bottom: 70px;
  font-size: 18px;
  color: #333;
  text-align: center;
}
.down .content_box {
  width: 405px;
  height: auto;
  margin: 0 auto;
}
.content_box_left {
  width: 200px;
  height: auto;
  float: left;
}
.content_box_left .v1 {
  width: 100%;
  height: 55px;
  border-radius: 8px;
  background: #fe7615;
  line-height: 55px;
  cursor:pointer
}
.content_box_left .v2 {
  margin-top: 20px;
}
.content_box_left .v1 img {
  width: 42px;
  height: 42px;
  float: left;
  margin: 5px 0 0 20px;
}
.content_box_left .v1 span {
  color: #fff;
  font-size: 15px;
}
.content_box_right {
  float: right;
  width: 140px;
  width: 140px;
}
.content_box_right img {
  width: 140px;
  width: 140px;
}