网页header固定不动+隐藏二级菜单栏

效果图如下：

图1 header初始状态

 

图2 鼠标移到“分类浏览”，出现二级菜单

 

图3 鼠标移到右上角用户头像处，出现二级菜单

    
    
    
    
    
    
    



    

    

        
        

            

                
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.header-ctt {/*页面下拉，header固定不动*/
    position: fixed;
    top: 0;
    left: 0;
    height: 60px;
    width: 100%;
    border-bottom: 1px solid #d8d8d8;
    text-align: center;
    z-index: 100;
    font-size: 16px;
    background-color: #fff;
    color: #333;
    -webkit-box-shadow: 0 0 3px rgba(102,102,102, .05);
    -moz-box-shadow: 0 0 3px rgba(102,102,102, .05);
    box-shadow: 0 0 3px rgba(102,102,102, .05);
}
.header-ctt a,.header-ctt a:-webkit-any-link{
    color: #333;
    text-decoration: none;
}
body{
    background: #fff;
}

.header-ctt.header-black{
    background: rgba(0, 0, 0, .5);
}
.header-black .header-layer{
    position: absolute;
    top: 0;
    left: 0;
    width:100%;
    height: 100%;
    z-index: 101;
}
.header-layer{
    background: rgba(0, 0, 0, .5);
}
.header-ctt .header-list-ctt{
    position: relative;
    margin: 0 auto;
    max-width: 1200px;
    min-width: 1024px;
    height: 100%;
    line-height: 60px;
    z-index: 102;
}
.header-ctt .header-list{
    font-weight: bold;
}

.header-logo img{
    float: left;
    display: inline-block;
    margin-right: 10px;
    height: 54px;
    width: 54px;
    border-radius: 27px;
    margin-left: 15px;
    margin-top: 3px;
}
.header-li{
    float: left;
    display: inline-block;
    padding-right: 10px;
    margin-left: 60px;
    font-size: 16px;
    font-weight: bold;
    color: #000;
    position: relative;
}
.header-li a span{
    height: 60px;
    line-height: 60px;
    text-align: center;
    color: #000;
}

.header-ctt .header-list-ctt .header-list{
    float: left;
    display: inline-block;
    position: relative;
}

.header-ctt a
,.header-ctt a:-webkit-any-link
,.header-ctt a:hover{
    color: #333;
}

.header-black.header-ctt a
,.header-black.header-ctt a:-webkit-any-link
,.header-black.header-ctt a:hover{
    color: #fff;
}
.header-ctt .header-li-focus .header-item-parent
,.header-ctt .header-li-focus .header-item-parent:hover{
    color: #e72233;
}
.header-ctt .header-li-focus .header-item-parent:hover{
    color: #e72233;
}
.header-ctt .header-li-focus .header-item-parent .iconfont{
    font-size: 18px;
}
.header-ctt .header-list-ctt .header-user-ctt{
    float: right;

}

.header-item-children{
    position: absolute;
    top: 60px;
    left: 0;
    width: 270px;
    box-sizing: border-box;
    z-index: 200;
}
.header-item-tri{
    display: block;
    position: absolute;
    top: 0;
    left: 50px;
    width: 13px;
    height: 11px;
    background-image: url("../../asset/images/header_tri.png");
    background-size: 100%;
    background-repeat: no-repeat;
    z-index: 204;
}
.header-black .header-item-tri{
    background-image: url("../../asset/images/header_tri_black.png");
}
.header-item-children-ctt{
    margin-top: 10px;
    padding: 20px;
    border: 1px solid #e5e5e5;
    overflow: hidden;
    background-color: #fff;
}
.header-black .header-item-children-ctt{
    border: none;
    overflow: hidden;
    background: rgba(0, 0, 0, .6);
}
.header-item-children-ctt li{
    float: left;
    display: inline-block;
    padding-top: 18px;
    box-sizing: border-box;
    width: 50%;
    list-style: none;
}
.header-item-children-ctt li:nth-child(odd){
    border-right: 1px solid #eee;
}
.header-black  .header-item-children-ctt li:nth-child(odd){
    border-right: 1px solid #000;
}
.header-item-children-ctt li:first-child, .header-item-children-ctt li:nth-child(2){
    padding-top: 0;
}
.header-item-children .header-item-child-ctt .header-item-child{
    display: block;
    line-height: 16px;
    font-size: 16px;
    font-weight: normal;
    color: #333;
    text-align: center;
}
.header-black .header-item-children .header-item-child-ctt .header-item-child{
    color: #fff;
}
.header-item-children-ctt li .header-item-child:hover
,.header-black .header-item-children-ctt li .header-item-child:hover{
    color: #e82838;
}

#headerUser{
    float: right;
    width: 200px;
    overflow: hidden;
}
.header-userlist-ctt{
    z-index: 200;
}
#headerUser .header-user-{
    display: block;
    height: 60px;
    width: 200px;
    overflow: hidden;
    font-size: 16px;
    font-weight: bold;
    line-height: 60px;
}
#headerUser .header-user- a{
    float: left;
    display: inline-block;
    margin-right: 10px;
    overflow: hidden;
}
.header-img-ctt{
    height: 60px;
    line-height: 60px;
    box-sizing: border-box;
}

.header-img-ctt .iconfont{
    float: right;
    line-height: 60px;
}
#headerUser .header-user- img{
    width: 50px;
    height: 50px;
    border-radius: 25px;
    margin-top: 5px;
}
#headerUser .header-userlist{
    box-sizing: border-box;
    width: 200px;
    font-size: 16px;
    border: 1px solid #e5e5e5;
    background-color: #fff;
}
.header-black #headerUser .header-userlist{
    background-color: #000;
    border: none;
}
#headerUser .header-userlist .header-useritem{
    margin-bottom: 3px;
    width: 100%;
    height: 49px;
    line-height: 49px;
    background-image: url("../../asset/images/header_right_linner.png");
    background-size:100%;
    background-repeat: no-repeat;
    background-position: bottom;
    text-align: center;
}
#headerUser .header-userlist .header-useritem:last-child
,.header-black #headerUser .header-userlist .header-useritem:last-child{
    background: none;
    margin-bottom: 0;
}
.header-black #headerUser .header-userlist .header-useritem{
    background-image: url("../../asset/images/header_rightb_linner.png");
}
#headerUser .header-userlist .header-useritem a{
    color: #666;
}
.header-black #headerUser .header-userlist .header-useritem a{
    color: #ddd;
}
#headerUser .header-userlist .header-useritem a:hover
,.header-black #headerUser .header-userlist .header-useritem a:hover{
    color: #e82838;
}
.header-usitem-bottom{
    display: block;
    height: 1px;
    width: 200px;
}
.header-usitem-bottom img{
    display: block;
    width: 100%;
    height: 100%;
}
.header-msg-ctt{
    position: relative;
    overflow: visible !important;
    margin-right: 31px !important;
}
.header-msg-ctt .has-msg{
    position: absolute;
    left: 8px;
    top: 12px;
    padding: 0 6px;
    height: 18px;
    line-height: 16px;
    font-size: 12px;
    background-color: #fa4a58;
    color: #fff;
    border-radius: 10px;
    font-weight: normal;
}

.header-users a:hover{
    color: #e82838;
}
.header-item-spa:hover{
    text-decoration: underline;
}

 

 

if($('.has-msg').hasClass('hide')){
    $('.has-msg').fadeIn('slow', function(e){
        $('.has-msg').removeClass('hide');
    });
}else {
    $('.has-msg').fadeOut('slow', function (e) {
        $('.has-msg').addClass('hide');
    });
}
$('.header-li').hover(function(e){
    var target = e.target;
    var ul = $(target).children('.header-item-children');
    $('.header-li .header-item-children').hide();
    if(ul.length > 0){
        $(ul[0]).show();
    }
},
function(e){
    var target = e.target;
    var ul = $(target).children('.header-item-children');
    if(ul.length > 0){
        $(ul[0]).hide();
    }
});
$('.header-item-children').hover(function(e){},function(e){
    $('.header-item-children').hide();
});
$('.header-user-ctt').hover(function(){
    $('.header-userlist-ctt').show();
},function(){
    $('.header-userlist-ctt').hide();
});