/*!
 * Start Bootstrap - Modern Business (https://startbootstrap.com/template/modern-business)
 * Copyright 2013-2020 Start Bootstrap
 * Licensed under MIT (https://github.com/StartBootstrap/startbootstrap-logomodern-business-nav/blob/master/LICENSE)
 */
body {
  padding-top: 56px;
}
.navbar-bg{
  background: #fff;
  height: 80px;
 box-shadow: 4px 0 20px -5px rgba(0, 0, 0, 0.2);
}
.navbar-bg  .nav-item a {
 color:  #333333; 
 font-weight: 500;
}
.navbar .navbar-nav > li > a:hover,
.navbar .navbar-nav > li > a:focus {
  color: #2F99E5;
}

 .navbar .navbar-nav > .active > a,
.navbar .navbar-nav > .active > a:hover,
.navbar .navbar-nav > .active > a:focus {
  color:  #2F99E5;
  border-bottom: 1.5px solid  #2F99E5;
} 

.carousel-item {
  height: 91vh;
  min-height: 300px;
  background: no-repeat center center scroll;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}
.carousel-item-mask{
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, .2)
}

.portfolio-item {
  margin-bottom: 30px;
}

.card-core{
  border: 1px solid #f7f7f7
}

.content-title{
    position: relative;
    font-size: 36px;
    color: #222222;
    line-height: 46px;
    font-weight: 400;
    padding-bottom: 10px;
    margin-bottom: 10px;
    /* display: inline-block; */
    text-align: center;
    margin-top: 100px;
}

.content-title::before{
    position: absolute;
    bottom: 0px;
    left: 50%;
    width: 165px;
    height: 4px;
    margin-left: -82px;
    background: url(../img/bd.png);
    content: '';
}

.cooperation-company{
  width: 100px;
  height: 100px;
  margin: 10px;
  cursor: pointer;
  border-radius: 10%;
}
.cooperation-company-mid{
  width: 80px;
  height: 80px;
  margin: 10px;
  cursor: pointer;
  border-radius: 10%;
}
.cooperation-company-small{
   width: 120px;
  height: 50px; 
  margin: 10px;
  cursor: pointer;
  border-radius: 10%;
}

.nav-bg-img{
  width: 100%;
  height: 500px;
  color: #fff;
  background-size: cover;
}
.nav-bg-img-about{
  background-image: url("../img/hero_1.jpg");
}
.nav-bg-img-services{
  background-image: url("../img/hero_2.jpg");
}
.nav-bg-img-contact {
  background-image: url("../img/hero_2.jpg");
}

.intro{
  position: absolute;
  top: 400px;
  left: 50%;
  transform: translate(-50%, -50%);/*相对于自己的百分比*/
}
.intro p{
  font-size: 1.3rem;
}
.activeColor{
  color: #2F99E5;
}

.services-img{
  width: 100%;
  height: 350px;
}

.services-item .card{
  border: none;
}

.services-item:hover{
  /* box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1); */
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  /* margin-top: -8px; */
  background: #fff;
}

.contact-item-title{
  position: relative;
  left: -37px;
}
.about-news-img-big{
  width: 100%;
  height: 250px;
}
.about-news-img-small{
  width: 100%;
  height: 200px;
}