html,
body {
  min-height: 100%;
}
.body_bg {
  background-color: #fff;
}

.navbar-fixed-top {
  position: absolute !important;
}

.navbar-inverse {
  border-color: transparent !important;
}

.navbar-header span {
  line-height: 50px;
  margin-right: 50px;
  color: #2e7ddf;
  font-size: 14px;
}

.dropdown-menu {
  background-color: rgba(0, 0, 0, 0.4) !important;
}

.dropdown-menu > li > a {
  color: #fff !important;
}

.navbar-brand img {
  height: 100%;
}

.lunbo {
  width: 100%;
}

.navbar-inverse .navbar-nav > .active > a {
  background-color: transparent !important;
  color: #2e7ddf !important;
}

.navbar-inverse .navbar-nav > li > a {
  color: #fff !important;
}

.nav > .dropdown > ul > li:hover a {
  color: #2e7ddf !important;
}

.dropdown-menu {
  min-width: 120px !important;
}

/*我们服务的行业*/
.spacing {
  margin-top: 50px;
}

.core {
  padding-top: 30px;
}

.core_business {
  width: 100%;
  margin: 0 auto;
}

.bin {
  margin: 0 auto;
}

.bin .line {
  display: inline-block;
  margin: 0 auto;
  border-top: 1px solid #000;
}

.bin .txt {
  color: #000;
  vertical-align: bottom;
}

.core_list > p {
  padding: 0 20px;
}

.core_list {
  padding-top: 20px;
}

.core_list .core_list_in {
  padding-top: 8px;
  background-color: #eee;
  width: 100%;
  height: 250px;
}

.core_list .core_list_in .title {
  color: #2e7ddf;
  line-height: 40px;
  font-size: 18px;
  font-weight: bold;
}

.core_list .core_list_in .blue-out {
  height: 78%;
  margin: 0 12px;
  background-color: #000;
}

.core_list .core_list_in .blue {
  display: inline-block;
  background-color: #2e7ddf;
  width: 100%;
  height: 100%;
}

.core_list .core_list_in img {
  transition: opacity 1s;
  position: absolute;
  top: 28px;
  left: 27px;
}

.core_list .core_list_in img:hover {
  opacity: 0.4;
}

.core_list .core_list_in .xx {
  position: absolute;
  top: 117px;
  left: 45px;
  color: #fff;
  display: none;
  font-size: 18px;
}

.core_list .core_list_in img:hover + .xx,
.core_list .core_list_in .xx:hover {
  display: inline-block;
}

.core_list .core_list_in .xx:hover + img {
  opacity: 0.4;
}

.core_list h4 {
  padding-bottom: 20px;
}

.navbar {
  margin: 0 auto;
}

.about {
  background: url('../img/tuanduiyoushi.png') no-repeat center;
  margin: 50px auto;
  padding: 20px 0;
  background-size: cover;
}

.about > .container > h2 {
  color: #fff;
  margin-bottom: 20px;
}

.about > .container > p {
  color: #fff;
}

.media {
  background-color: #fff;
  border-radius: 5px;
  padding: 30px 20px;
}

.media-body > p {
  padding-top: 10px;
  font-size: 15px;
  line-height: 25px;
}

.second {
  margin: 50px 0;
}

/*强大的技术服务保障*/
.in-second,
.in-second .line {
  margin: 0 auto;
}

.in-second .line {
  display: inline-block;
  border-top: 1px solid #000;
}

.in-second .txt {
  color: #000;
  vertical-align: bottom;
  display: inline-block;
}

.chart > ul {
  display: flex;
  flex-wrap: wrap;
  margin: 1rem;
  border-radius: 0.8rem;
  text-align: center;
  padding: 0;
  margin: 0;
}

.chart > ul li {
  width: 25%;
  display: flex;
  justify-content: center;
  list-style: none;
}

.chart > ul li > div {
  margin: 0.5rem;
}

/*底部*/
.footer {
  background-color: rgb(62, 67, 80);
  padding: 20px 0;
  color: #fff;
}

.footer .container ul {
  margin: 0 auto;
  width: 800px;
  list-style: none;
  text-align: center;
  margin-bottom: 20px;
}

.footer .container ul li {
  color: #707070;
  float: left;
  background-color: #fff;
  border-radius: 15px;
  margin-right: 30px;
}

.footer .container ul li p {
  font-size: 14px;
  padding: 6px;
  margin-bottom: 0 !important;
}

.footer .container hr {
  clear: both;
  position: relative;
  top: 15px;
}

@media screen and (max-width: 768px) {
  .bin {
    width: 80%;
  }
  .bin .txt {
    font-size: 18px;
  }
  .bin .line {
    width: 24%;
  }
  .core_business p {
    font-size: 14px;
  }
  .about > .container > p {
    font-size: 14px;
    line-height: 20px;
  }
  .youshi {
    font-size: 20px;
  }
  .in-second {
    width: 80%;
  }
  .in-second .txt {
    font-size: 18px;
  }
  .in-second .line {
    width: 17%;
  }
  .core_business p {
    font-size: 14px;
  }
  .chart ul > li {
    width: 20%;
  }
  .chart-in img {
    width: 60%;
  }
  .chart-in p {
    font-size: 14px;
  }
}

@media only screen and (min-width: 1029px) {
  .bin {
    width: 50%;
  }
  .bin .txt {
    font-size: 30px;
  }
  .bin .line {
    width: 30%;
  }
  .core_business p {
    font-size: 18px;
  }
  .about > .container > p {
    font-size: 18px;
    line-height: 30px;
  }
  .youshi {
    font-size: 30px;
  }
  .in-second {
    width: 50%;
  }
  .in-second .txt {
    font-size: 30px;
  }
  .in-second .line {
    width: 25%;
  }
  .core_business p {
    font-size: 18px;
  }
  .chart ul > li {
    width: 20%;
  }
  .chart-in img {
    width: 60%;
  }
  .chart-in p {
    font-size: 16px;
  }
}