* {
  list-style: none;
}

.head {
  height: 380px;
  background: url('../images/title-bg/bg.png') no-repeat;
  background-size: 100% 100%;
  color: #fff;
  font-size: 60px;
  text-align: center;
  margin-bottom: 53px;
}

.head .name {
  padding-top: 165px;
}

.head .letter {
  font-size: 30px;
  opacity: 0.6;
}

nav {
  margin: 0 auto;
  width: 496px;
  height: 33px;


}

ul {
  display: flex;
  justify-content: center;
}

ul li {
  text-align: center;
  float: left;
  font-size: 30px;
  color: #1A2448;
  cursor: pointer;
  /* margin-right: 20px; */

}

ul .line {
  float: left;
  box-sizing: border-box;
  border-right: 3px solid #1A2448;
  margin: 5px 16px;
  height: 33px;

}

.tab {
  color: #D72122;
}

.content1 {
  margin-top: 40px;
  margin-bottom: 30px;
  padding: 20px 30px;
  box-shadow: 0px 1px 8px 0px rgba(0, 0, 0, 0.19);
  border-radius: 10px;
  line-height: 36px;

}

.content1 div {
  display: none;
}

.content1 h2 {
  text-align: center;
  color: #1A2448;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 30px;
}

.content1 p {
  font-size: 16px;
  line-height: 36px;
  font-weight: 400;
  color: #485069;
}

.content1 .div_show {
  display: block;
}