* {
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
a {
  text-decoration: none;
}
ul,
li {
  list-style: none;
}
img {
  display: block;
  border: none;
}
.content {
  width: 100%;
  overflow: hidden;
  position: relative;
}
.show_img {
  width: 100%;
  height: auto;
}
.yh_left {
  width: 80px;
  height: 80px;
  position: absolute;
  top: 20px;
  left: 60px;
}
.yh_right {
  width: 80px;
  height: 80px;
  position: absolute;
  top: 20px;
  right: 70px;
}
.enroll_href {
  width: 62%;
  height: 11%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  display: block;
  z-index: 1;
}