body {
  font-size: 18px;
  line-height: 30px;
  color: #333;
  background: #fff;
}

* {
  margin: 0;
  padding: 0;
}

a, a:link, a:visited {
  text-decoration: none;
  color: inherit;
}

a:hover {
  text-decoration: none;
  color: #E5BB78;
}

/* a:visited {
  color: #fff;
} */

ul,
ol {
  list-style: none;
}

img {
  border: 0;
}

.clear {
  clear: both;
}

.banner{
  height: calc(100vw / 3.5);
  width: 100%;
  background-image: url('../image/banner-bg.jpg');
  background-size: 100% 100%;
}

.nav-bar {
  
}
.nav-bar-top {
  /* display: flex; */
  /* align-items: center; */
  /* justify-content: center; */
  height: 75px;
  width: 100%;
  min-width: 1200px;
  line-height: 75px;
  background: rgba(56, 117, 198, 1);
  text-align: center;
}
.nav-bar-top li {
  display: inline-block;
  color: #fff;
  margin: 0 60px;
}

.nav-bar-bottom{
  height: 65px;
  background-color: #22569F;
  width: 100%;
  min-width: 1200px;
  line-height: 65px;
  text-align: center;
}

.nav-bar-bottom li {
  display: inline-block;
  color: #fff;
  margin: 0 20px;
}

.main-wrap{
  width: 1200px;
  margin: 0 auto 40px;
  padding: 40px 0;
  position: relative;
}

.main-wrap-title {
  font-size: 28px;
  color: #000000;
  text-align: center;
  margin: 0px auto 30px;
}

.btn-item {
  width: 380px;
  border-radius: 4px;
  padding: 15px 13px;
  box-sizing: border-box;
  background-color: rgba(56, 117, 198, 1);
  color: #fff;
  position: relative;
  float: left;
  /* display: inline-block; */
  margin-right: 30px;
  margin-top: 30px;
  text-align: center;
  /* min-height: 60px; */
  /* line-height: ; */
}
.btn-item a{
  width: 100%;
  height: auto;
  position: relative;
  display: block;
  z-index: 99;
}
.btn-item:nth-child(3n) {
  margin-right: 0;
}
.btn-item::before{
  width: 370px;
  content: '';
  position: absolute;
  outline: #E5BB78 2px solid;
  height: calc(100% - 10px);
  left: 5px;
  top: 5px;
}