.wrap {
    width: 1200px;
    margin: 40px auto 0;

}


.wrap>div {
    float: left;
}


/* 左边选择项目 */
.select {
    width: 150px;
    margin-right: 20px;
    z-index: 99;
}

.select ul {
    border: 1px solid rgba(204, 204, 204, 0.6);
    border-bottom: none;
    background: #fff;
}

.select ul:last-child {
    border-bottom: 1px solid rgba(204, 204, 204, 0.6);
}

.select> ul> li {
    width: 100%;
    text-align: center;
    height: 40px;
    line-height: 40px;
    font-size: 15px;
    margin: 3px auto;
    position: relative;
}
.select> ul> li:last-child {
    margin: 3px auto 0;
}


.select ul li a {
    display: block;
}

.select> ul> li ul{
    display: none;
    position: absolute;
    left: 149px;
    top: 0px;
    z-index: 99;
}
.select> ul> li ul li{
    width: 150px;
    text-align: center;
    height: 40px;
    line-height: 40px;
    font-size: 15px;
    margin: 0 auto;
    z-index: 99;
}

.select> ul> li ul li a:hover{
    background: rgb(226, 226, 226);
}

.select> ul> li:hover ul{
    display: block;
}

.select> ul> li:hover > a {
    /* color: #000 !important; */
    background: rgb(226, 226, 226);
    padding-left: 15px;

    border-left: 3px solid #dc3023;
    /* border-left: 3px solid red; */
    transition: padding-left .2s ease-in-out;
}

.select> ul> li:first-child {
    background: #008c46;
    color: #fff;
    margin-top: -3px;
    font-size: 19px;
    font-family: "Microsoft YaHei", "微软雅黑";
    margin-left: -1px;
    width: 150px;
}

.select ul li a.active{
    background: rgb(226, 226, 226);
    padding-left: 15px;
    border-left: 3px solid #dc3023;
}


/* 简介 */
.intro{
    border: 1px solid #ccc;
    border-top: 2px solid #008c46;
    width: 1030px;
    font-family: "微软雅黑","Microsoft Yahei",Helvetica,Arial,sans-serif;
}
.intro .intro_cont{
    margin: 20px auto 70px;
    width: 91%;
}
.intro .intro_cont h2,
.intro .intro_cert h2{
    font-size: 30px;
    font-weight: 800;
    /* margin-bottom: 10px; */
    padding-bottom: 10px;
    border-bottom: 1px solid #ccc;
}

.intro .intro_cont p{
    font-size: 20px;
    line-height: 30px;
    text-indent: 2em;
    margin: 20px 0;
}
.intro .intro_cont .center{
    margin: 0 auto;
    text-align: center;
}

.intro .intro_cont .center img{
    width: 75%;
}


.intro .intro_cert{
    width: 91%;
    margin: 20px auto 30px;
}
.intro .intro_cert p{
    margin: 20px 0;
    text-align: center;
}
.intro .intro_cert p img{
    margin-right: 20px;
    width: 31%;
}
.intro .intro_cert p img:nth-of-type(3n){
    margin-right: 0px;
}
.intro .intro_cert p:last-child img{
    width: 47%;
}