.about_us_list .t_banner .banner_title {
  top: 30px;
  margin-top: 0;
}
.about_us_list .div_list_case {
  padding: 0 10px;
  margin-top: 50px;
}
.about_us_list .brief-introduction .brief-title {
  font-size: 18px;
  text-align: center;
  margin-top: 30px;
  font-weight: bold;
  padding: 0 10px;
}
.about_us_list .brief-introduction .brief-title span {
  display: block;
  font-size: 14px;
  margin-top: 20px;
  font-weight: normal;
}
.about_us_list .brief-introduction .content {
  overflow: hidden;
  margin-top: 30px;
  padding-bottom: 50px;
  border-bottom: 1px dashed #cdcdcd;
}
.about_us_list .brief-introduction .content .the-left {
  padding: 0 10px;
}
.about_us_list .brief-introduction .content .the-left p {
  font-size: 14px;
  line-height: 24px;
  margin-top: 25px;
}
.about_us_list .brief-introduction .content .the-left p.first {
  margin-top: 0;
}
.about_us_list .brief-introduction .content .the-right {
  background: #f1f1f1;
  margin-top: 50px;
  padding: 30px 0;
}
.about_us_list .brief-introduction .content .the-right .sub-title {
  font-size: 16px;
  text-align: center;
  font-weight: bold;
  margin-bottom: 30px;
}
.about_us_list .brief-introduction .content .the-right .double-link {
  overflow: hidden;
  width: 294px;
  margin: 0 auto;
}
.about_us_list .brief-introduction .content .the-right .double-link a {
  font-size: 14px;
  display: block;
  width: 140px;
  height: 40px;
  line-height: 40px;
  text-indent: 6px;
  border: 1px solid #4d4d4d;
  color: #333333;
  margin: 0 auto;
  position: relative;
  float: left;
}
.about_us_list .brief-introduction .content .the-right .double-link a img {
  display: block;
  position: absolute;
  right: 10px;
  top: 5px;
}
.about_us_list .brief-introduction .content .the-right .double-link a.last {
  text-indent: 19px;
  margin-left: 10px;
}
.about_us_list ul.ul_list_case {
  overflow: hidden;
  margin-top: -20px;
}
.about_us_list ul.ul_list_case li {
  margin-top: 20px;
}
.about_us_list ul.ul_list_case li .top_img {
  width: 100%;
  max-height: 321px;
  overflow: hidden;
}
.about_us_list ul.ul_list_case li .top_img img {
  width: 100%;
}
.about_us_list ul.ul_list_case li .bottom_text {
  padding: 0 15px;
  padding-bottom: 30px;
  background: #f1f1f1;
  position: relative;
}
.about_us_list ul.ul_list_case li .bottom_text .bottom_text_t {
  font-size: 18px;
  color: #333333;
  text-align: center;
  padding-top: 80px;
  margin-bottom: 20px;
}
.about_us_list ul.ul_list_case li .bottom_text p {
  font-size: 14px;
  color: #333333;
  line-height: 24px;
}
.about_us_list ul.ul_list_case li .bottom_text a.circular_link {
  display: block;
  width: 120px;
  position: absolute;
  top: -60px;
  left: 50%;
  margin-left: -60px;
}
.about_us_list ul.ul_list_case li .bottom_text a.circular_link .tr_imgs img {
  width: 100%;
}
.about_us_list ul.ul_list_case li .bottom_text .a_rlink {
  font-size: 16px;
  display: block;
  width: 140px;
  height: 40px;
  line-height: 40px;
  text-indent: 17px;
  border: 1px solid #4d4d4d;
  color: #333333;
  margin: 0 auto;
  position: relative;
  margin-top: 20px;
}
.about_us_list ul.ul_list_case li .bottom_text .a_rlink img {
  display: block;
  position: absolute;
  right: 10px;
  top: 5px;
}