body{
    background-color: white;
    width: 1920px;
}

.RG_TitleHead{
    background-color: black;
}

.RG_TitleHead_img{
    width: 296px;
    height: 80px;
    position: relative;
    left: 300px;
}

/*导航栏设置*/
ul{
    position: relative;
    list-style-type:none;
    line-height: 36px;
    background-color: black;
    text-align: center;
    margin-left: 1px;
    left: 400px;
}

/*导航栏设置*/
li{
    display: inline;
    line-height: 40px;
    float: left;
}

/*导航栏设置*/
a{
    text-decoration: none;
    color:white;
    font-size: 18px;
    margin: 0;
    padding: 9px 40px;
    word-spacing: 4px;
}

/*导航栏设置*/
a:hover{
    background-color: blue;
}

/*导航栏设置*/
a:visited{
    background-color: red;
}

.RG_Introduction_Head{
    margin-top: 50px;
    margin-left: 100px;
    position: relative;
}

.RG_Introduction_Table{
    margin-left: 700px;
    position: relative;
}

.RG_Introduction_Bt1{
    width: 100px;
    height: 50px;
    color: black;
    font-size: 20px;
    text-decoration: underline; 
    text-align: center;
    border: 0px;
    font-weight: bold;
}

.RG_Introduction_Bt2{
    margin-left: 50px;
    width: 100px;
    height: 50px;
    color: black;
    font-size: 20px;
    text-decoration: underline; 
    text-align: center;
    border: 0px;
    font-weight: bold;
}

.RG_Introduction_Bt3{
    margin-left: 50px;
    width: 100px;
    height: 50px;
    color: black;
    font-size: 20px;
    text-decoration: underline; 
    text-align: center;
    border: 0px;
    font-weight: bold;
}

/*中心PI 照片显示区域*/
.RG_Content_Area_PI{
    margin-left: 500px;
    margin-top: 50px;
    position: relative;
}

.RG_Content_Area_Table{
 
}

.RG_Content_Sub_Area1{
    position: relative;
}

.RG_Content_Sub_Area2{
    margin-left: 80px;
    position: relative;
}

.RG_Content_Sub_Area3{
    margin-left: 80px;
    position: relative;
}

.RG_Content_Sub_Area4{
    margin-left: 80px;
    position: relative;
}

/*中心PI 照片对应的文字*/
/* 1st*/
.RG_Content_Sub_Area1_Name{
    margin-left: 70px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area1_Institution{
    margin-left: 30px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area1_Position{
    margin-left: 60px;
    font-weight: bold;
    font-size: 18px;
}

/* 2rd*/
.RG_Content_Sub_Area2_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area2_Institution{
    margin-left: 110px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area2_Position{
    margin-left: 140px;
    font-weight: bold;
    font-size: 18px;
}

/* 3th*/
.RG_Content_Sub_Area3_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area3_Institution{
    margin-left: 130px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area3_Position{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

/* 4th*/
.RG_Content_Sub_Area4_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area4_Insitution{
    margin-left: 130px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Sub_Area4_Position{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

/*员工对应的img*/
.RG_Content_Area_Staff{
    margin-left: 500px;
    margin-top: 50px;
    position: relative;
}

.RG_Content_Staff_Sub_Area1{
    position: relative;
}

.RG_Content_Staff_Sub_Area2{
    margin-left: 80px;
    position: relative;
}

.RG_Content_Staff_Sub_Area3{
    margin-left: 80px;
    position: relative;
}

.RG_Content_Staff_Sub_Area4{
    margin-left: 80px;
    position: relative;
}


/*员工 照片对应的文字*/
/* 1st*/
.RG_Content_Staff_Sub_Area1_Name{
    margin-left: 70px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area1_Insitution{
    margin-left: 30px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Are1_Position{
    margin-left: 60px;
    font-weight: bold;
    font-size: 18px;
}

/* 2rd*/
.RG_Content_Staff_Sub_Area2_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area2_Insitution{
    margin-left: 110px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area2_Position{
    margin-left: 140px;
    font-weight: bold;
    font-size: 18px;
}

/* 3th*/
.RG_Content_Staff_Sub_Area3_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area3_Insitution{
    margin-left: 130px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area3_Position{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

/* 4th*/
.RG_Content_Staff_Sub_Area4_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area4_Insitution{
    margin-left: 130px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Staff_Sub_Area4_Position{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

/*学生对应的img*/
/*reading students*/
.RG_Content_Area_Student{
    margin-left: 200px;
    margin-top: 50px;
    position: relative;
    
}

.swiper-container-head_div{
	margin-left: 200px;
	position: relative;
}


/*Reading students' border line*/
.RG_Content_Reading_Student_div{
    border: 5px solid black;
    border-radius: 20px;
    position: relative;
    width: 1200px;
    height: 350px;
    margin-left: 200px;
}

/*Graduation students*/
.RG_Content_Area_Graduation_Studetn{
	margin-left: 400px;
    margin-top: 50px;
    position: relative;
}

/* head img for Graduation students*/
.Graduation_Student_swiper_container_head_div{
	margin-left: 0px;
	position: relative;
}

.RG_swiper_container_Graduation_Student_head_img{
    
    position: relative;
}

/*border line for Graduation students*/
.RG_Graduation_Student_border_line_div{
    border: 5px solid black;
    border-radius: 20px;
    position: relative;
	width: 1200px;
    height: 350px;
}

.RG_Content_Student_Sub_Area1{
    position: relative;
}

.RG_Content_Student_Sub_Area2{
    margin-left: 80px;
    position: relative;
}

.RG_Content_Student_Sub_Area3{
    margin-left: 80px;
    position: relative;
}

.RG_Content_Student_Sub_Area4{
    margin-left: 80px;
    position: relative;
}


/*员工 照片对应的文字*/
/* 1st*/
.RG_Content_Student_Sub_Area1_Name{
    margin-left: 70px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area1_Insitution{
    margin-left: 30px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area1_Position{
    margin-left: 60px;
    font-weight: bold;
    font-size: 18px;
}

/* 2rd*/
.RG_Content_Student_Sub_Area2_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area2_Insitution{
    margin-left: 110px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area2_Position{
    margin-left: 140px;
    font-weight: bold;
    font-size: 18px;
}

/* 3th*/
.RG_Content_Student_Sub_Area3_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area3_Insitution{
    margin-left: 130px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area3_Position{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

/* 4th*/
.RG_Content_Student_Sub_Area4_Name{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area4_Insitution{
    margin-left: 130px;
    font-weight: bold;
    font-size: 18px;
}

.RG_Content_Student_Sub_Area4_Position{
    margin-left: 160px;
    font-weight: bold;
    font-size: 18px;
}

/*底部栏效果*/
.RG_Bottom_Footer{
    margin-top: 400px;
}

.RG_Bottom_Footer{
    clear: both;
    background-color: black;
    height: 200px;
    width: 1920px;
    position: relative;
    /*给父元素添加这两个属性，即可让子元素的图片垂直居中，且父元素的align-items: center 为不可缺少属性*/
    display: flex;
    align-items: center;
}

.RG_Bottom_Picture{
    position: absolute;
    top:30%;
    left:45%;
    transform: translate(-30%, -45%);
}

.RG_Bottom_Footer_Text1{
    color: white;
    font-size: 18px;
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-55%, -50%);
    display: inline-block;
}

.RG_Bottom_Footer_Text2{
    color: white;
    font-size: 18px;
    position: absolute;
    top: 76%;
    left: 50%;
    transform: translate(-70%, -50%);
    display: inline-block;
}