.ai_wrapper {
	font-size: 12px;
}
.ai_wrapper .nav {
    width: 100%;
    margin: 20px auto 0;
    border-bottom: 1px solid #dcdcdc;
    display: flex;
}
.ai_wrapper .nav li {
    height: 25px;
    float: left;
    cursor: pointer;
    list-style: none;
}
.ai_wrapper .nav li a {
    padding: 0 20px;
    color: #222;
    font-weight: 700;
    text-decoration: none;
}
.ai_wrapper .nav li.cur {
    border-bottom: 2px solid red;
    color: red;
}

.ai_wrapper .con {
    display: none;
}
.ai_wrapper .con h3 {
    margin: 20px 0 10px;
    font-size: 12px;
    color: #000;
}

.ai_wrapper .con.cur {
    display: block;
}

.ai_wrapper .con dl {
  margin: 1em 0;
}
.ai_wrapper .con dt {
  position: relative;
  padding-left: 1.2em;
  margin: 0.5em 0;
  font-weight: bold;
}
.ai_wrapper .con dt::before {
  content: "?";
  position: absolute;
  left: 0;
  color: #333;
  font-size: 1.2em;
}
.ai_wrapper .con dd {
  margin-left: 1.2em;
  margin-bottom: 1.2em;
}
.ai_wrapper.hide {
	display:none;
}