.nav {
  width: 100%;
  height: 70px;
  line-height: 70px;
  background-color: #fff;
}
.nav .logo span {
  width: 148px;
  padding: 16px 53px;
  border-radius: 10px;
  color: #fff;
  background-color: #3d81f5;
}
.nav .search {
  margin-left: 226px;
}
.nav .search input {
  width: 500px;
  height: 45px;
  padding: 0 45px 0 20px;
  border-radius: 10px;
  background: #f4f4f4 url('../img/sousuo-2.png') no-repeat;
  background-position: 460px;
}
.nav .user span {
  cursor: pointer;
}
.searchList .user .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: block;
  margin-top: 13%;
  margin-right: 5px;
  background: #c2c2c2 url('../img/user.png') no-repeat center;
}