body {
  margin: 0;
  padding: 0;
}
.header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  font-size: 25px;
  width: 100vw;
  height: 80px;
  background-color: #000000;
  color: #fff;
  padding: 0 40px;
  box-sizing: border-box;
}
.content {
  width: 100vw;
  height: calc(100vh - 160px);
  display: flex;
  justify-content: center;
  align-items: center;
}
.menu {
  width: 180px;
  height: 100px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  background-color: #444444;
  border-radius: 5px;
  margin: 10px;
  color:#fff;
  cursor: pointer;
}
.footer {
  width: 100vw;
  height: 80px;
  background-color: #000000;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.footerLink {
  color: #fff;
  text-decoration: none;
}
.footerLink:hover {
  text-decoration: underline;
  color: #989898;
}
.beian {
  display: flex;
  justify-content: center;
  align-items: center;
}