* {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.0);
}
.nav_top {
  background: #fff;
  border-top: 1px solid #d8d8d8;
  border-bottom: 1px solid #d8d8d8;
  height: .8rem;
  position: fixed;
  top: .75rem;
  left: 0;
  width: 100%;
  z-index: 1;
}
.nav_a {
  float: left;
  line-height: .8rem;
  cursor: pointer;
  color: #767676;
  height: .78rem;
  margin-left: .2rem;
  margin-right: .3rem;
}
.nav_on {
  border-bottom: 2px solid #333;
  font-weight: bolder;
  color: #333;
}
.nav_rig {
  border-left: 1px solid #d8d8d8;
  line-height: .8rem;
  width: 1.6rem;
  background: url("../wap_img/nav_icn.png") no-repeat 1.2rem 50%;
  float: right;
  background-size: .23rem auto;
  text-indent: .2rem;
  cursor: pointer;
}
.nav_box {
  position: absolute;
  left: 0;
  right: 0;
  top: .78rem;
  background: #fff;
  -webkit-box-shadow: 0 0 3px 0 rgba(0, 0, 0, .5);
  display: none;
  box-shadow: 0 0 3px 0 rgba(0, 0, 0, .5);
  border-radius: 0 0 4px 4px;
  padding-left: .2rem;
  padding-bottom: .3rem;
}
.nav_box:after {
  content: '';
  position: absolute;
  right: .6rem;
  top: -.2rem;
  width: .3rem;
  height: .2rem;
  background: url("../wap_img/nav_san.png") no-repeat 100% 100%;
  background-size: 100% auto;
}
.nav_box a {
  float: left;
  margin-top: .3rem;
  width: 32%;
  cursor: pointer;
  color: black;
  text-align: center;
}
body {
  cursor: pointer
}