Question

我有这样的风格:

header{
   width:400px;
   min-height:640px;
   background:#9B9B76;
   float:left;
   z-index:1000;  /*high*/
}
nav{
   width:100%;
   z-index:1001;  /*highest*/
}

nav a{
   float:left;
   width:80%;
   padding:10%;
   font-size:20px;
}
nav a:hover{
   background:#997548;
}
.LevelCnt_1{
    float:left;
    width:300px;
    z-index:1;       /*Lowest*/
    position:absolute;
    left:400px;
    background:#baafa9; 
}

问题在于,如果我设置了<密码>:0p,那么直观Cnt_1就留在头顶上。

为什么发生这种情况?

Answer 1

z-index only work with position relative, fundamental & specified . 因此,请在<条码>上填写:relative至header & nav 页: 1

和

header{
   width:400px;
   min-height:640px;
   background:#9B9B76;
   float:left;
   z-index:1000;  /*high*/
position:relative
}
nav{
   width:100%;
   z-index:1001;  /*highest*/
position:relative
}

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