.content-wrap {
  width: 100%;
}
.content-box {
    padding-top: 60px;
    padding-bottom: 100px;
    background: #fff;
}
.content-box1,.content-box3,.content-box5 {
    background: #F6F8F9;
}
.content-item {
    margin: 0 auto;
    width: 1200px;
}
@media (max-width: 1200px){
    .content-item {
        width: 996px;
    }

}
@media (max-width: 996px){
    .content-item {
        width: 786px;
    }
}
@media (max-width: 786px){
    .content-item {
        width: 700px;
    }
}