.header {
  height: 40px;
 background-color: #000; 
 display: flex;
 justify-content: center;
}
.header .content {
  width: 1400px;
  line-height: 40px;
  color: #fff;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100px;
  width: 1400px;
  margin: 0 auto;  
}
.top .logo {
  
  height: 60px;
}

.top .tabs {
  font-size: 20px;
}
.zhinan {
  width: 1400px;
  display: flex;
  margin: 60px auto 80px;
}
.zhinan .zhi-1, .zhinan .zhi-2, .zhinan .zhi-3 {
  width: 100%;
}

.zhi-1, .zhi-2 {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.z-1 {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: 20px;
}
.z-2 {
  width: 280px;
  text-align: center;
  margin-bottom: 20px;
}
.z-3 {
  padding: 10px 50px;
  border: 1px solid #2087d4;
  color: #2087d4;
  border-radius: 4px;
}
.zhi-3 .z-1 {
  width: 200px;
  margin-top: 40px;
  margin-left: 80px;
  padding: 10px 50px;
  background-color: #2087d4;
  color: #fff;
  border-radius: 4px;
  text-align: center;
}

.ruzhu {
  background-color: #ededed;
  padding-bottom: 80px;
}


.ruzhu .title {
  text-align: center;
  font-size: 32px;
  padding: 40px;
  font-weight: bold;
}
.cards {
  display: flex;
  width: 1400px;
  background-color: #fff;
  margin: 0 auto;
}

.cards .card {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  padding: 40px;
}
.cards .card img {
  width: 100px;
  height: 100px;
}