前端样式css学习记录（混合记录js/jq+html+bootstrap）

<div class="navBtn fr">
    <span class="line1"></span>
    <span class="line2"></span>
    <span class="line3"></span>
</div>

$("header .navBtn").click(function(){
    $(this).toggleClass("on");
    $("nav").toggleClass("slideDown");
})

/*基本样式*/
header .navBtn{width:30px; margin-right:50px; height:30px; overflow:hidden; position:relative; margin-top:12px; display:none;}
header .navBtn span{width:100%; left:0; background:#fff; height:3px; position:absolute; transition:all 500ms;}
header .navBtn .line1{top:0; transform:rotate(0); transform-origin:left top;}
header .navBtn .line2{top:14px;}
header .navBtn .line3{bottom:0; transform:rotate(0); transform-origin:left bottom;}
/*on样式*/
header .navBtn.on .line1{width:145px; transform:rotate(41deg);}
header .navBtn.on .line2{left:-100%;}
header .navBtn.on .line3{width:145px; transform:rotate(-41deg);}
/*响应式*/
@media (max-width: 767px) {
    header .navBtn{display:block; z-index:100; position:relative;}
}

<nav class="fr slideDown">
<ul class="clearfix">
<li><a href="/" title="我爱模板网" target="_blank">首页</a></li>
        <li class="">
            <a href="http://www.5imoban.net/PSDmoban/" title="PSD模板" target="_blank">PSD模板</a>
        </li>
</ul>
</nav>

/*基本样式*/
nav li{float:left; position:relative;}
nav li>a{height:55px; display:block; color:#fff; font:14px/55px "微软雅黑"; padding:0 15px;}
nav li:hover>a,nav li.current>a{background:#0098d7; color:#fff;}
nav .pop-menu{position:absolute; top:52px; left:0; border-top:3px solid #0098d7; background:#fff; box-shadow:0 2px 10px 0 rgba(0,0,0,.1); border-radius:3px; display:none; width:300px; padding:10px; z-index:5;}
nav .pop-menu h4{font-size:16px; font-family:"微软雅黑"; color:#333; margin:10px 0 5px; font-weight:normal;}
nav .pop-menu div a{float:left; width:50%; padding:2px 5px; color:#333; margin-bottom:3px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
nav .pop-menu  div a:hover{background:#f0f0f0; color:#3b8fef;}
nav li:hover .pop-menu{display:block;}
/*响应式*/
@media (max-width: 1199px) {
    nav li>a{padding:0 8px;}
}
@media (max-width: 991px) {
    nav li>a{padding:0 3px;}
    nav .pop-menu{left:-150%;}
}
@media (max-width: 767px) {
    nav{position:fixed; width:100%; height:100%; transition:all 500ms; background:rgba(0,0,0,.8); left:0; top:-100%; z-index:99;}
    nav.slideDown{top:0;}
    nav li{float:none;}
    nav li:first-child{margin-top:55px;}
    nav li>a{height:35px; line-height:35px; padding:0 15px;}
    header nav li .pop-menu{display:none;}
}