Catch Box ：Changed overall layout, not responsive

The default container is too small, I expanded it, but there is no responsive layout. code show as below:

.site {
    width: 1100px;
}
#content {
    overflow: hidden;
}
#sidebar-header-top {
    width: 100%;
}
#primary {
    width: 750px;
}
#secondary {
    width: 260px;
}
 
 

strong {
    font-weight: bold;
    font-size: 24px;
}
 
 

body, input, textarea {
    color: #373737;
    font-family:  "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 300;
    line-height: 1.62em;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;    
}