*{
        margin: 0;
        padding: 0;
}

a{
        color: black;
}

body{
        background: white;
}

.seperate_40px{
        width: 100%;
        height: 40px;
}

.introduction_teacher_content{
        width: 1500px;
        height: 1000px;
        margin: auto;
        padding: 0;
        position: relative;
        display: block;
}

.introduction_teacher_content > .introduction_teacher_content_left{
        width: 270px;
        height: 100%;
        position: relative;
        float: left;
}


.introduction_teacher_content >.introduction_teacher_content_left > .introduction_teacher_content_left_list{
        width: 270px;
        height: 540px;
        position: relative;
        float: left;
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_list > .left_title{
        width: 270px;
        height: 90px;
        background: #1f2751;
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_list > .left_title > p{
        position: relative;
        float: right;
        font-family: 等线;
        font-size: 28px;
        text-align: left;
        width: 270px;
        height: 90px;
        line-height: 90px;
        color: white;
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_list > .arrow  img{
        position: absolute;
        height: 20px;
        line-height: 20px;
        object-fit: contain;
        right: 25px;
        top: 127px;
        
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_list > .left_list_content> .list{
        position: relative;
        height: 90px;
        width: 270px;
        border-bottom: 1px solid;
}

.introduction_teacher_content >.introduction_teacher_content_left > .introduction_teacher_content_left_list > .left_list_content> .list > svg{
        position: absolute;
        top: 37px;
        left: 37px;
        width: 70px;
}

.introduction_teacher_content >.introduction_teacher_content_left > .introduction_teacher_content_left_list > .left_list_content> .list > p{
        position: relative;
        font-family: 等线;
        font-size: 28px;
        text-align: left;
        width: 270px;
        height: 92px;
        line-height: 92px;
        z-index: 1;
        float: right;
 } 

 
.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_link{
        position: relative;
        margin-top: 80px;
        height: 350px;
        width: 270px;
        border: solid 1px black;
        float: left;
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_link >.link_title{
        width: 270px;
        height: 92px;
        background: grey;
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_link >.link_title > p{
        position: relative;
        font-family: 等线;
        font-size: 28px;
        text-align: left;
        width: 270px;
        height: 92px;
        line-height: 92px;
        float: right;        
}

.introduction_teacher_content > .introduction_teacher_content_left > .introduction_teacher_content_left_link > .link_content > p{
        position: relative;
        font-family: 等线;
        font-size: 20px;
        text-align: left;
        width:270px;
        height: 50px;
        line-height: 50px;
        float: right;        
        display: inline-block;
        overflow: hidden;
}

 
 .introduction_teacher_content > .introduction_teacher_content_right{
         margin-left: 80px;
         position: relative;
         
         width: 1000px;
         height: 829px;
         float: left;
         
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .right_title{
        position: relative;
        height: 90px;
        border-bottom: solid 2px #1f2751;
}
 
 .introduction_teacher_content > .introduction_teacher_content_right > .right_title > p:nth-child(1){
        position: absolute;
        left: 0;
        bottom: 0;
        height: 40px;
        background: #1f2751;
        width: 8px;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .right_title > p:nth-child(2){
        position: absolute;
        left: 20px;
        bottom: 5px;
        font-family: 等线;
        font-size: 28px;
        text-align: left;
        height: 28px;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .teacher_content{
         position: relative;
         height: 765px;
         overflow: hidden;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .teacher_content> .teacher_content_div{
        position: absolute;
        top: 0px;
        left: 0px;
        width: 100%;
        height: 765px;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .teacher_content> .teacher_content_div> .teacher_list{
        width: 542px;
        height: 92px;
        float: left;
        border-bottom: solid 1px gray;
        position: relative;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .teacher_content> .teacher_content_div> .teacher_list > p:nth-child(1){
        width: 15px;
        height: 3px;
        position: absolute;
        left: 0;
        bottom: 16px;
        background: #1f2751;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .teacher_content> .teacher_content_div> .teacher_list > p:nth-child(2){
        font-family: 等线;
        font-size: 24px;
        text-align: left;
        height: 24px;
        position: absolute;
        left: 20px;
        bottom: 5px;
 }

 .introduction_teacher_content > .introduction_teacher_content_right > .teacher_content> .teacher_content_div> .teacher_list > img{
        
        
        
        
        height: 19px;
        position: absolute;
        right: 20px;
        bottom: 5px;
        object-fit: contain;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count{
        position: relative;
        width: 100%;
        height: 50px;
        margin-top: 90px;
        
        font-family: 等线;
        font-size: 19px;
        color: grey;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count > p:nth-child(6){
        float: right;
        display: block;
        margin-right: 30px;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count > p:nth-child(5){
        float: right;
        display: block;
        margin-right: 10px;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count > p:nth-child(4){
        float: right;
        display: block;
        margin-right: 10px;
        border: solid 1px grey;
        cursor: pointer;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count > p:nth-child(3){
        float: right;
        display: block;
        margin-right: 10px;
        cursor: pointer;
        border: solid 1px grey;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count > p:nth-child(2){
        float: right;
        display: block;
        margin-right: 10px;
        border: solid 1px grey;
        cursor: pointer;
}

.introduction_teacher_content > .introduction_teacher_content_right >.page_count > p:nth-child(1){
        float: right;
        display: block;
        margin-right: 10px;
        border: solid 1px grey;
        cursor: pointer;
}