复制代码代码如下:
* {
margin:0;
padding:0;
}
.ul {
background-color:rgb(134, 170, 209);
height: 55px;
}
.ul li {
float:left;
list-style: none;
background-color:rgb(134, 170, 209);
width: 20%;
height: 100%;
}
.item {
display: block;
text-align:center;
line-height: 49px;
height: 100%;
transition: all 0.5s;
-moz-transition: all 0.5s;
-webkit-transition: all 0.5s;
-o-transition: all 0.5s;
cursor:pointer;
}
.item:hover {
background-color:rgb(168, 209, 253);
}
@media only screen and (max-width: 400px) {
.ul li {
width: 100%;
height: 100%;
}
}
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注意的是@media属性必须写在下面，从而覆盖上面的css
