.w{
    width: 1200px;
    margin: 0 auto;
}
h2{
    height: 30px;
    width: 800px;
    font-size: 30px;
    font-family: 'KaiTi';
    text-align: center;
}
h6{
    position: absolute;
    top: 160px;
    left: 350px;
    margin-left: 500px;
    text-align: center;
    font-size: 14px;
    color:rgb(141, 133, 133);
}
h4{
    position: absolute;
    left: 350px;
    font-size: 15px;
}
h5{
    position: absolute;
    top: 140px;
    left: 530px;
}
h5.a1{
    font-size: 15px;
    color: rgb(141, 133, 133);  
}
.pic1{
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163534.jpg);
    background-size: 800px 400px;
}
.w video{
    margin-top: 100px;
    margin-left: 250px; 
}
.main p{
    margin-left: 300px;
    margin-top: 100px;
    font-size: 20px;
}
.liaojie p{
    margin: auto;
    color: skyblue;
    font-size: 14px;
}
.liaojie .pic2{
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163552.jpg)no-repeat 10px;
    background-size: 800px 400px;
}
h3{
    margin-left: 400px;
    font-size: 40px;
    font-family: 'SimSun';
}
.xuexi p{
    margin: auto;
    color: black;
    font-size: 20px;
}
.xuexi .pic3{
    margin-top: 50px;
    margin-bottom: 50px;
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163559.jpg)no-repeat;
    background-size: 800px 400px;
}
.pic4{
    margin-top: 50px;
    margin-bottom: 50px;
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163603.jpg)no-repeat;
    background-size: 800px 400px;
}
.jidan p{
    margin: auto;
    color: black;
    font-size: 20px;
}
.pic5{
    margin-top: 50px;
    margin-bottom: 50px;
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163607.jpg)no-repeat;
    background-size: 800px 400px;
}
.pic6{
    margin-top: 50px;
    margin-bottom: 50px;
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163611.jpg)no-repeat;
    background-size: 800px 400px;
}
.pic7{
    margin-top: 50px;
    margin-bottom: 50px;
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163614.jpg)no-repeat;
    background-size: 800px 400px;
}
.suyuan p{
    margin: auto;
    color: black;
    font-size: 20px;
    margin-bottom: 50px;
}
.pic8{
    margin-top: 50px;
    margin-bottom: 50px;
    width: 800px;
    height: 400px;
    margin-left: 180px;
    background: url(../images/20201230163620.jpg)no-repeat;
    background-size: 800px 400px;
}