body {
  /* 防止出现左右的滚动条 */
  overflow: hidden;
  margin: 0;
  padding: 0;
}
.wrapper {
  width: 100%;
  height: 100px;
  position: absolute;
  z-index: 100;
}
.wrapper .nav {
  list-style: none;
  width: 1000px;
  height: 100px;
  padding: 0;
  margin: 0 auto;
}
.wrapper img {
  width: 120px;
  height: 100px;
  float: left;
  margin-top: 0px;
  margin-left: 0px;
}
.wrapper .nav li {
  width: 20%;
  height: 50px;
  float: left;
  margin-top: 25px;
}
.wrapper .nav li a {
  text-decoration: none;
  color: #fff;
  text-align: center;
  line-height: 50px;
  display: block;
  font-size: 28px;
  font-family: "KaiTi";
}

/* 闪烁的星星 的基本样式 */
.star {
  width: 5px;
  height: 5px;
  background: #fff;
  position: absolute;
  z-index: -1;
}

/*  闪烁动画，改变透明度  */
@keyframes blink {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}