.banner-case {
  background: url('../img/banner6.png') no-repeat;
  width: 100%;
  height: 360px;
  background-size: 100% 100%;
}
.case-tabs{
  height: 60px;
  padding-top: 10px;
}
.case-tabs ul{
  height: 60px;
  text-align: center;
}
.case-tabs ul li{
  height: 58px;
  width: 120px;
  line-height: 60px;
  text-align: center;
  display: inline-block;
}

.case-tabs ul li.case-active{
  border-top: 2px solid #0587ff;
  color: #0587ff;
  background: #ffffff;
  font-weight: bold;
}

/* title */
.box-title {
  text-align: center;
  font-size: 28px;
  padding: 60px 0;
}
.box-title hr {
  width: 85px;
  height: 4px;
  background: #3399ff;
  margin: 15px auto 0;
}

.case-box{
  display: grid;
  grid-template-columns: 33.3% 33.3% 33.3%;
  padding: 20px 0;
}
.case-box .case-item{
  padding: 5px;
  height: 310px;
}
.case-box .case-item img{
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
}

.flex-container li{
  margin-bottom: 15px;
}