/*about公共部分*/
.about_common {
  width: 100%;
  overflow: hidden;
  background: #fff url(../img/images/about_bg.jpg) no-repeat top center;
  background-size: 100%;
  padding: 60px 0 40px;
  position: relative;
  z-index: 11;
}
.about_menu {
  width: 100%;
  height: 50px;
  margin-bottom: 55px;
  border: 1px solid #f0f0f0;
  box-shadow: 0px 3px 3px rgba(0, 0, 0, 0.04);
  text-align: center;
  background-color: #fff;
}
.about_menu li a {
  display: block;
  color: #000;
  height: 48px;
  font-size: 14px;
  line-height: 50px;
  width: 80px;
  margin: 0 auto;
}
.about_menu li.about_now a {
  font-weight: bold;
}
.about_content {
  color: #626262;
  font-size: 14px;
  line-height: 25px;
}
.about_content h1 {
  color: #3e3e3e;
  font-size: 36px;
  margin: 35px 0 45px;
}
/*about页面独有*/
/*荣誉资质的分类 star*/
.qualification_menu {
  width: 600px;
  margin: 0 auto 50px;
  overflow: hidden;
}
.qualification_menu li {
  width: 150px;
  height: 50px;
  float: left;
  text-align: center;
  line-height: 50px;
  font-size: 24px;
  margin: 0 25px;
  cursor: pointer;
}
.qualification_menu li:nth-of-type(1) div {
  width: 50px;
  height: 50px;
  float: left;
  background-image: url(../img/qualification_menuicon.png);
  background-repeat: no-repeat;
  background-position: -23px -60px;
  transition: all 0.5s;
}
.qualification_menu li:nth-of-type(2) div {
  width: 50px;
  height: 50px;
  float: left;
  background-image: url(../img/qualification_menuicon.png);
  background-repeat: no-repeat;
  background-position: -95px -60px;
  transition: all 0.5s;
}
.qualification_menu li:nth-of-type(3) div {
  width: 50px;
  height: 50px;
  float: left;
  background-image: url(../img/qualification_menuicon.png);
  background-repeat: no-repeat;
  background-position: -165px -60px;
  transition: all 0.5s;
}
.qualification_menu li:hover {
  color: #bf1609;
}
.qualification_menu li:hover div {
  background-position-y: -10px;
}
.qualification_menu li.qualification_now {
  color: #bf1609;
}
.qualification_menu li.qualification_now div {
  background-position-y: -10px;
}
/*荣誉资质的分类   end*/
.about_qualification {
  width: 100%;
  overflow: hidden;
}
.about_qualification li {
  margin-bottom: 35px;
  height: auto;
  overflow: hidden;
}
.about_qualification li .qualification_img {
  width: calc(100% - 1px);
  height: 344px;
  z-index: 1;
  border: 1px solid #c4c4c4 !important;
  position: relative;
  cursor: pointer;
  overflow: hidden;
}
.about_qualification li .qualification_img > img {
  width: 100%;
  position: relative;
}
.about_qualification li .qualification_img .qualification_mask {
  width: 100%;
  height: 100%;
  text-align: center;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  background-color: rgba(0, 0, 0, 0.7);
  overflow: hidden;
  opacity: 0;
  transition: all 0.5s;
}
.qualification_mask .mask_box {
  width: 55px;
  height: 55px;
  background-color: #181878;
  border-radius: 27.5px;
  text-align: center;
  line-height: 55px;
  position: relative;
  top: 50%;
  left: 50%;
  margin: -27.5px 0 0 -27.5px;
  overflow: hidden;
}
.about_qualification li .qualification_img:hover .qualification_mask {
  opacity: 1;
}
@media only screen and (max-width: 767px) {
  .about_qualification li {
    margin-bottom: 15px;
  }
  .about_common {
    padding: 30px 0 20px;
  }
  .about_menu {
    display: none;
  }
  .about_content h1 {
    color: #3e3e3e;
    font-size: 24px;
    margin: 0px 0 20px;
  }
  .about_qualification li .qualification_img {
    height: auto;
    overflow: hidden;
  }
  .about_qualification li:nth-of-type(2n + 1) {
    padding-right: 5px;
    padding-left: 0;
  }
  .about_qualification li:nth-of-type(2n) {
    padding-left: 5px;
    padding-right: 0;
  }
}
@media only screen and (min-width: 768px) {
  .about_common {
    padding: 40px 0 25px;
  }
  .about_menu {
    display: none;
  }
  .about_qualification li:nth-of-type(4n + 1) {
    padding: 0 15px 0 0;
  }
  .about_qualification li:nth-of-type(4n + 2) {
    padding: 0 10px 0 5px;
  }
  .about_qualification li:nth-of-type(4n + 3) {
    padding: 0 5px 0 10px;
  }
  .about_qualification li:nth-of-type(4n) {
    padding: 0 0 0 15px;
  }
  .about_content h1 {
    color: #3e3e3e;
    font-size: 36px;
    margin: 0px 0 30px;
  }
}
@media only screen and (min-width: 992px) {
  .about_common {
    padding: 60px 0 40px;
  }
  .about_menu {
    display: block;
  }
  .about_qualification li:nth-of-type(4n + 1) {
    padding: 0 30px 0 0;
  }
  .about_qualification li:nth-of-type(4n + 2) {
    padding: 0 20px 0 10px;
  }
  .about_qualification li:nth-of-type(4n + 3) {
    padding: 0 10px 0 20px;
  }
  .about_qualification li:nth-of-type(4n) {
    padding: 0 0 0 30px;
  }
  .about_content h1 {
    color: #3e3e3e;
    font-size: 36px;
    margin: 35px 0 45px;
  }
  .about_qualification li .qualification_img {
    height: 295px;
  }
}
@media only screen and (min-width: 1200px) {
  .about_qualification li:nth-of-type(4n + 1) {
    padding: 0 45px 0 0;
  }
  .about_qualification li:nth-of-type(4n + 2) {
    padding: 0 30px 0 15px;
  }
  .about_qualification li:nth-of-type(4n + 3) {
    padding: 0 15px 0 30px;
  }
  .about_qualification li:nth-of-type(4n) {
    padding: 0 0 0 45px;
  }
  .about_qualification li .qualification_img {
    height: 344px;
  }
}

/*about公共部分*/
.about_common {
  width: 100%;
  overflow: hidden;
  background: #fff url(../img/images/about_bg.jpg) no-repeat top center;
  background-size: 100%;
  padding: 60px 0 40px;
  position: relative;
  z-index: 11;
}
.about_menu {
  width: 100%;
  height: 50px;
  margin-bottom: 55px;
  border: 1px solid #f0f0f0;
  box-shadow: 0px 3px 3px rgba(0, 0, 0, 0.04);
  text-align: center;
  background-color: #fff;
}
.about_menu li a {
  display: block;
  color: #000;
  height: 48px;
  font-size: 14px;
  line-height: 50px;
  width: 80px;
  margin: 0 auto;
}
.about_menu li.about_now a {
  font-weight: bold;
}
.about_content {
  color: #626262;
  font-size: 14px;
  line-height: 25px;
}
.about_content h1 {
  color: #3e3e3e;
  font-size: 36px;
  margin: 35px 0 45px;
}
/*about页面独有*/
/*荣誉资质的分类 star*/
.qualification_menu {
  width: 600px;
  margin: 0 auto 50px;
  overflow: hidden;
}
.qualification_menu li {
  width: 150px;
  height: 50px;
  float: left;
  text-align: center;
  line-height: 50px;
  font-size: 24px;
  margin: 0 25px;
  cursor: pointer;
}
.qualification_menu li div {
  width: 50px;
  height: 50px;
  float: left;
  transition: all 0.5s;
}
.qualification_menu li:nth-of-type(1) div {
  background-image: url(../img/qualification_menuicon.png);
  background-repeat: no-repeat;
  background-position: -23px -60px;
}
.qualification_menu li:nth-of-type(2) div {
  background-image: url(../img/qualification_menuicon.png);
  background-repeat: no-repeat;
  background-position: -95px -60px;
}
.qualification_menu li:nth-of-type(3) div {
  background-image: url(../img/qualification_menuicon.png);
  background-repeat: no-repeat;
  background-position: -165px -60px;
}
.qualification_menu li:hover {
  color: #bf1609;
}
.qualification_menu li:hover div {
  background-position-y: -10px;
}
.qualification_menu li.qualification_now {
  color: #bf1609;
}
.qualification_menu li.qualification_now div {
  background-position-y: -10px;
}
/*荣誉资质的分类   end*/
.about_qualification {
  width: 100%;
  overflow: hidden;
}
.about_qualification li {
  margin-bottom: 35px;
  height: auto;
  overflow: hidden;
}
.about_qualification li .qualification_img {
  width: calc(100% - 1px);
  height: 344px;
  z-index: 1;
  border: 1px solid #c4c4c4 !important;
  position: relative;
  cursor: pointer;
  overflow: hidden;
}
.about_qualification li .qualification_img > img {
  width: 100%;
  position: relative;
}
.about_qualification li .qualification_img .qualification_mask {
  width: 100%;
  height: 100%;
  text-align: center;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  background-color: rgba(0, 0, 0, 0.7);
  overflow: hidden;
  opacity: 0;
  transition: all 0.5s;
}
.qualification_mask .mask_box {
  width: 55px;
  height: 55px;
  background-color: #181878;
  border-radius: 27.5px;
  text-align: center;
  line-height: 55px;
  position: relative;
  top: 50%;
  left: 50%;
  margin: -27.5px 0 0 -27.5px;
  overflow: hidden;
}
.about_qualification li .qualification_img:hover .qualification_mask {
  opacity: 1;
}
@media only screen and (max-width: 767px) {
  .qualification_menu {
    width: 285px;
  }
  .qualification_menu li {
    width: 85px;
    height: 45px;
    float: left;
    text-align: center;
    line-height: 20px;
    font-size: 14px;
    margin: 0px 5px;
    cursor: pointer;
    padding-top: 5px;
  }
  .qualification_menu li div {
    width: 45px;
    height: 45px;
    float: left;
    transition: all 0.5s;
    margin-top: -5px;
  }
  .about_qualification li {
    margin-bottom: 15px;
  }
  .about_common {
    padding: 30px 0 20px;
  }
  .about_menu {
    display: none;
  }
  .about_content h1 {
    color: #3e3e3e;
    font-size: 24px;
    margin: 0px 0 20px;
  }
  .about_qualification li .qualification_img {
    height: auto;
    overflow: hidden;
  }
  .about_qualification li:nth-of-type(2n + 1) {
    padding-right: 5px;
    padding-left: 0;
  }
  .about_qualification li:nth-of-type(2n) {
    padding-left: 5px;
    padding-right: 0;
  }
}
@media only screen and (min-width: 768px) {
  .about_common {
    padding: 40px 0 25px;
  }
  .about_menu {
    display: none;
  }
  .about_qualification li .qualification_img {
    height: 235px;
  }
  .about_qualification li:nth-of-type(4n + 1) {
    padding: 0 15px 0 0;
  }
  .about_qualification li:nth-of-type(4n + 2) {
    padding: 0 10px 0 5px;
  }
  .about_qualification li:nth-of-type(4n + 3) {
    padding: 0 5px 0 10px;
  }
  .about_qualification li:nth-of-type(4n) {
    padding: 0 0 0 15px;
  }
  .about_content h1 {
    color: #3e3e3e;
    font-size: 36px;
    margin: 0px 0 30px;
  }
}
@media only screen and (min-width: 992px) {
  .about_common {
    padding: 60px 0 40px;
  }
  .about_qualification li .qualification_img {
    height: 344px;
  }
  .about_menu {
    display: block;
  }
  .about_qualification li:nth-of-type(4n + 1) {
    padding: 0 30px 0 0;
  }
  .about_qualification li:nth-of-type(4n + 2) {
    padding: 0 20px 0 10px;
  }
  .about_qualification li:nth-of-type(4n + 3) {
    padding: 0 10px 0 20px;
  }
  .about_qualification li:nth-of-type(4n) {
    padding: 0 0 0 30px;
  }
  .about_content h1 {
    color: #3e3e3e;
    font-size: 36px;
    margin: 35px 0 45px;
  }
  .about_qualification li .qualification_img {
    height: 295px;
  }
}
@media only screen and (min-width: 1200px) {
  .about_qualification li:nth-of-type(4n + 1) {
    padding: 0 45px 0 0;
  }
  .about_qualification li:nth-of-type(4n + 2) {
    padding: 0 30px 0 15px;
  }
  .about_qualification li:nth-of-type(4n + 3) {
    padding: 0 15px 0 30px;
  }
  .about_qualification li:nth-of-type(4n) {
    padding: 0 0 0 45px;
  }
  .about_qualification li .qualification_img {
    height: 344px;
  }
}