.banner{
    width: 100%;
    height: 400px;
    background-image: url("../img/chanpin.png");
    background-size: cover;
    text-align: center;
    color: #fff;
    overflow: hidden;
}
.banner h2{
    margin-top: 160px;
    font-size: 32px;
    margin-bottom: 40px;
}
.banner p{
    margin-top: 10px;
    font-size: 20px;
}
.title{
    text-align: center;
    font-size: 30px;
    font-weight: 400;
}
.part1 h2 {
    margin-top: 60px;
    margin-bottom: 40px;
}
.part1 p{
    text-align: center;
    font-size: 16px;
    margin-top: 10px;
}
.p1{
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    margin-top: 40px;
}
.p1-r p {
    width: 550px;
}
.p1-l img{
    width: 400px;
}
.p1-r{
    display: flex;
    height: 280px;
    flex-direction: column;
    justify-content: space-between;
}
.p2-img {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}
.p2-img img{
    width: 1000px;
}
.part2 h2 {
    margin-top: 40px;
}
.part3{
    width: 100%;
    background-color: #f2f2f2;
    height: 640px;
    margin-top: 60px;
    overflow: hidden;
}
.part3 h2{
    margin-top: 60px;
}
.p3-img{
    display: flex;
    justify-content: center;
    margin-top: 40px;
}
.p3-img img{
    width: 850px;
}
.part3 p {
    text-align: center;
    font-size: 18px;
    margin-top: 20px;
}
.add1 h2 {
    margin-top: 40px;
}
.add-img {
    display: flex;
    justify-content: center;
    margin: 40px auto;
}
.add-img img{
    width: 1200px;
}
.part4 {
    overflow: hidden;
    width: 100%;
    height: 240px;
    background-color: #086f9a;
}
.p4-list{
    width: 800px;
    margin: 40px auto;
    display: flex;
    justify-content: space-between;
}
.part4 h2 {
    color: #fff;
    margin-top: 40px;
}
.p4-list a{
    color: #fff;
    font-size: 16px;
    padding: 12px 20px;
    border: 1px solid #fff;
    border-radius: 8px;
}