CSS
5
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
#left{
width: 600px;
float: left;
margin-right: 10px;
}
#right{
width: 400px;
float: right;
}
@media only screen and (max-width: 1010px){
#left, #right{
width: 98%;
float: none;
margin: 10px auto;
}
}