html,
body {
  height: auto;
  position: relative;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "微软雅黑";
}
a {
  text-decoration: none !important;
  -webkit-tap-highlight-color: transparent;
  color: inherit;
}
ul,
li {
  list-style: none;
}
.comm_cont {
  width: 100%;
  height: auto;
  min-height: 100vh;
  background-color: #FFFFFF;
}
#head_box {
  width: 100%;
  height: auto;
  position: fixed;
  top: 0px;
  left: 0px;
  z-index: 5;
  background-color: #FFFFFF;
  transition: 0.5s;
}
.head_boxShow {
  top: -100px !important;
}
.head_boxA {
 top: -100px !important; box-shadow: 0px 6px 6px rgba(0, 0, 0, 0.2);
  transition: 0.5s;
}