响应式菜单是将盒子属性进行变换将display: none;变成display: block;
下面是响应式菜单未被触发时状态：
使用伪类：hover被触发的情况下状态：
响应式图片的原理与上面相同
未被触发时的状态：
使用伪类：hover被触发的情况下状态：
又到了发代码的时刻了
下面是响应式菜单与响应式图片全部代码，望周知亦有所帮助！
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.box{
50px;
height: 30px;
background: yellowgreen;
margin: 5px;
position: relative;
}
.hidden{display: none;
position: absolute;
top: 0;
left: 100%;
300px;
height: 100px;
}
.box:hover .hidden{
display: block;
background: palegreen;
}
.box1{
50px;
height: 30px;
background: yellowgreen;
margin: 5px;
position: relative;
}
.box1:hover .hidden{
position: absolute;
top: -35px;
display: block;
background: pink;
}
.box2{
50px;
height: 30px;
background: yellowgreen;
margin: 5px;
position: relative;
}
.box2:hover .hidden{
position: absolute;
top: -70px;
display: block;
background: black;
}
.box3{
/* margin: 220px;*/
position: relative;
200px;
text-align:center;
margin:300px auto;
background: red;
}
.b1{
200px;
height: 200px;
background-color: orangered;
position: absolute;
bottom: 100%;
left: 0;
display: none;
}
.box3:hover .b1{
display: block;
}
</style>
</head>
<body>
<div class="box">
<div class="hidden"></div>
</div>
<div class="box1">
<div class="hidden"></div>
</div>
<div class="box2">
<div class="hidden"></div>
</div>
<div class="box3">
一个图pian
<div class="b1"><img src="9.jpg" width="200px" height="200px"/></div>
</div>
</body>
</html>