.nav2 img{
    width: 400px;
    height: 400px;
}
.nav2 {
    display: flex;
}
.nav_c {
    padding: 40px;
}
.nav_c h3{
    font-size: 30px;
}
.nav_c div{
    font-size: 14px;
    line-height: 30px;
    margin-top: 40px;
}
.nav3 {
    display: block;
    text-align: center;
}
.nav3 h3{
    margin-top: 40px;
    font-size: 26px;
}
.nav3 div{
    padding: 40px;
    padding-left: 100px;
    padding-right: 100px;
    font-size: 14px;
    line-height: 40px;
}
.bott {
    top: 620px;
}
.zci {
    top: 600px;
}