.banner {
    width: 100%;
    height: 450px;
    background: url("../rongyida_files/bannerback.jpg") no-repeat;
    background-position: center;
    background-size: cover;
}

.tab {
    width: 100%;
    background: #292929;
}

.tab-cont {
    width: 1200px;
    margin: 0 auto;
}

.tab-cont ul {
    overflow: hidden;
    padding-left: 344px;
}

.tab-cont ul li {
    float: left;
    color: #ffffff;
    width: 170px;
    height: 60px;
    text-align: center;
    font-size: 16px;
    line-height: 55px;
    cursor: pointer;
}

.tab-cont ul li.activ {
    border-bottom: 5px solid #e72d44;
    color:#e72d44 ;
}

.switch {
    width: 100%;
    background: #f5f5f5;
}
.switch-cont{
    width: 1200px;
    margin: 0 auto;
}
.switch-cont > ul > li {
    width: 100%;
    display: none;
}

.switch-cont ul li:first-child {
    display: block;
}

.problem-top {
    text-align: center;
    padding: 66px 0 70px 0;
}

.problem-top h3 {
    font-size: 36px;
    padding-bottom: 24px;
}

.problem-top p {
    font-size: 18px;
    color: #666666;
    padding-bottom: 34px;
}

.aboutus > p {
    font-size: 18px;
    line-height: 30px;
    color: #666666;
    text-indent: 2em;
    padding-bottom: 30px;
}

.aboutus-ul {
    display: flex;
    justify-content: space-between;
}

.idea-txt {
    width: 100%;
    height: 338px;
    background: url("../rongyida_files/ideaback.png") no-repeat;
    background-position: center;
    background-size: cover;
    text-align: center;
}

.idea-txt h3 {
    font-size: 48px;
    color: #ffffff;
    padding: 56px 0;
}

.idea-txt p {
    font-size: 24px;
    color: #ffffff;
    line-height: 48px;
}

.idea-Sense {
    width: 100%;
    height: 570px;
    background: url("../rongyida_files/senseback.png") no-repeat;
    background-position: center;
    text-align: center;
}

.idea-Sense h3 {
    font-size: 48px;
    padding-top: 160px;
    padding-bottom: 36px;
}

.idea-Sense p {
    font-size: 24px;
    line-height: 34px;
}

.idea-mission {
    width: 100%;
    height: 338px;
    background: url("../rongyida_files/missionback.png") no-repeat;
    background-position: center;
    text-align: center;
}

.idea-mission h3{
    font-size: 48px;
    padding-top: 70px;
    padding-bottom: 50px;
    color: #ffffff;
}

.idea-mission p {
    font-size: 24px;
    color: #ffffff;
    line-height: 48px;
}

.contact-txt {
    width: 100%;
    overflow: hidden;
    padding-bottom: 70px;
}

.contact-left {
    float: left;
    width: 800px;
    height: 600px;
}

.contact-right {
    float: right;
    width: 394px;
    height: 600px;
    background: #eeeeee;
}

.contact-right-txt {
    padding: 60px 40px 0 40px;
}

.contact-right-txt p {
    line-height: 36px;
    font-size: 18px;
}

.contact-right-txt h2 {
    font-size: 18px;
    line-height: 36px;
    padding-bottom: 34px;
    font-weight: 500;
}

.contact-right-txt h2 i {
    font-weight: 600;
    color: #e72d44;
    font-size: 24px;
}

.cooperation {
    width: 1060px;
    margin: 0 auto;
    background: #ffffff;
    /*margin-top: 70px;*/
    /*margin-bottom: 118px;*/
    overflow: hidden;
}

.cooperation-left {
    float: left;
    height: 100%;
    width: 446px;
}

.cooperation-right {
    float: left;
    height: 100%;
    margin-left: 170px;
}

.cooperation-right h3 {
    font-size: 36px;
    padding-left: 50px;
    background: url("../rongyida_files/hback.png") no-repeat;
    background-position: 0 center;
    margin-top: 110px;
    margin-bottom: 34px;
}

.cooperation-right p {
    font-size: 24px;
    line-height: 60px;
}

.recruit{
    padding: 70px 0;
}
.recruit-li{
    background: #ffffff;
    padding: 34px 40px;
    margin-bottom: 70px;
}
.recruit-li:last-child{
    margin-bottom: 0;
}
.recruit-li-top{
    border-bottom: 2px solid #e5e5e5;
    padding-bottom: 14px;
}
.recruit-li-top h3{
    font-size: 36px;
    padding-bottom: 16px;
}
.recruit-li-top>p>span{
    font-size: 14px;
    color: #999999;
}
.add{
    margin-left: 56px;
    padding-left: 16px;
    background: url("../rongyida_files/add2.png") no-repeat;
    background-position: 0 center;
}
.xinzi{
    margin-left: 56px;
    padding-left: 28px;
    background: url("../rongyida_files/xinzi.png") no-repeat;
    background-position: 0 center;
}
.recruit-li-txt{
    padding: 30px 18px;
    border-bottom: 2px solid #e5e5e5;
}
.recruit-li>p{
    font-size: 18px;
    color: #e72d44;
    padding-left: 54px;
    margin-top: 32px;
    background: url("../rongyida_files/email.png") no-repeat;
    background-position: 0 center;
}
.recruit-li-txt-ol h2{
    font-size:18px ;
}
.recruit-li-txt-ol>div{
    font-size:18px ;
    color: #666666;
    padding:22px 0 26px 0;
    line-height: 36px;
}