body {
  margin: 0;
}
/* 底部样式 */
footer {
  text-align: center;
}

/* 头部样式 */
.header{
  width: 100%;
  height: 65px;
  background: white;
  display: flex;
  justify-content: center;
  align-items: center;
}
.header #appName{
  display: block;
  margin-right: 32%;
  font-size: 25px;
  font-weight: bolder;
}
.header a{
  font-size: 14px;
  color: black;
  margin-right: 60px;
  text-decoration: none;
}
.header .act{
  font-size: 16px;
  font-weight: bolder;
}