默认开头
<meta charset=”utf-8″/>
<meta name="viewport" content="user-scalable=no,width=device-width,initial-scale=1.0,maximum-scale=1.0"><code>
div{
width: 300px;
height: 300px;
background-color: :pink;
}
@media screen and (max-width:539px) {
div{
background-color: blue;
}
width: 300px;
height: 300px;
background-color: :pink;
}
@media screen and (max-width:539px) {
div{
background-color: blue;
}
}
@media screen and (min-width:540px) and (max-width:969px) {
div{
background-color: green;
}
}
@media screen and (min-width:970px) {
div{
background-color: red;
}
}
