* {
  margin:10px;
  color: #000000;
  background-color: #ffffff;
}

h1{
  color: #000000;
}

h2 {
  cursor: pointer;
  color: #000000;
}

h4 {
  margin: 0px;
}

a { color: #000066; }

hr {
  height: 1px;
}

#introductionTop{
  text-align: center;
}

.header{
  display: flex;
  flex-direction: row-reverse;
  width: 95%;
  height: 50px;
}

.box {
  margin: auto;
  max-width:1400px;
}

.title{
  text-align: center;
}

.toppic {
  margin: 50px;
  text-align: center;
}

.toppicture {
  height: 50%;
  width: 50%;
}

.introduction {
  margin: 20px;
}

.information {
  margin: 20px;
}

.trajectory {
  margin: 20px;
}

.download {
  border: 1px solid;
  border-color: #000066;
  border-radius: 16px;
  margin: 25px;
  padding: 25px 50px;
}

.attention {
  text-align: left;
}

.address{
  text-align: center;
  margin: 50px 10px;
}

.copyright {
  text-align: center;
  margin: 50px 10px;
}

.name{
  width:400px;
  background-color: #ffffff;
  color:#000000;
  font-weight: bold;
}

.email{
  width:400px;
  background-color: #ffffff;
  color:#000000;
  font-weight: bold;
}

textarea{
  width:400px;
  height: 200px;
  background-color: #ffffff;
  color:#000000;
  font-weight: bold;
}

.submit{
  width:100px;
  background-color: #c0c0c0;
  color:#000000;
}