.w{
    width: 1200px;
    margin: 0 auto;
}
h2{
    text-align: center;
}
video{
    width: 700px;
    height: 350px;
    margin-left: 260px;
    margin-top: -30px;
}
.pic1{
    margin-left: 200px;
    width: 200px;
    height: 100px;
    background: url("../images/20201230194655.png")no-repeat;
}
.head p{
    margin-top: 10px;
    margin-left: 350px;
    font-size: 15px;
}
.main p{
    margin-top: 40px;
    margin-bottom: 30px;
    margin-left: 180px;
    font-size: 18px;
}
.pic2{
    margin-top: 30px;
    margin-left: 280px;
    width: 700px;
    height: 400px;
    background: url(../images/20201230200717.jpg)no-repeat;
}
.pic3{
    margin-top: 30px;
    margin-left: 280px;
    width: 700px;
    height: 400px;
    background: url(../images/20201230200726.jpg)no-repeat;
}
.pic4{
    margin-top: 30px;
    margin-left: 280px;
    width: 700px;
    height: 400px;
    background: url(../images/20201230200729.jpg)no-repeat;
}
.pic5{
    margin-top: 30px;
    margin-left: 280px;
    width: 700px;
    height: 400px;
    background: url(../images/20201230200731.jpg)no-repeat;
}
.pic6{
    margin-top: 30px;
    margin-left: 280px;
    width: 700px;
    height: 400px;
    background: url(../images/20201230200734.jpg)no-repeat;
}
.pic7{
    margin-top: 30px;
    margin-left: 280px;
    width: 700px;
    height: 400px;
    background: url(../images/20201230200736.jpg)no-repeat;
}