CSS菜单无法在IE7或更低版​​本中运行

Question

在大多数浏览器中，它运行良好。

但是在IE7中，请检查screenshot，这真的很乱。

1. 下拉菜单位置不正确。
2. 下拉菜单项未链接在一起。
3. 搜索文本字段位置不正确。
4. 搜索提交按钮 - 为什么按钮顶部有“文本”..？
5. 圆角（反正不太重要）

请在此处查看menu demo。

<style>

.header-bg {
background: url(img/header-bg.jpg) repeat-x top;
height: 420px;
}

body {
    background: url(img/page-bg.jpg) repeat;
    font-family: Arial, Helvetica, sans-serif;
    }

        .top-wrapper {
    background: none;
    margin: -430px auto 270px;
    min-height: 150px;
    padding: 10px 27px 0 27px;
    width: 980px;
    clear: both;
    overflow: hidden;
}
.top-wrapper .top-menu {
    background: #f1faf4;
    border-right: 1px solid #81b030;
    border-bottom: 1px solid #81b030;
    border-left: 1px solid #81b030;
    -moz-border-radius-bottomright: 6px;
    border-bottom-right-radius: 6px;
    -moz-border-radius-bottomleft: 6px;
    border-bottom-left-radius: 6px;
    padding: 10px 35px 8px 35px;
    float: right;
}
.top-wrapper .top-menu li {
    float: left;
    padding: 8px 14px 10px 0;
    margin: 0 14px 0 0;
    border-right: 1px dotted #282828;
}
.top-wrapper .top-menu li a {
    color: #282828;
    font-size: 12px;
    font-weight: bold;
    text-decoration: none;
}
.top-wrapper .top-menu li a:hover {
    text-decoration: underline;
}
.top-wrapper .top-menu li.search {
    padding: 0 10px 0 0;
}
.top-wrapper .top-menu li.search input {
    float: left;
    border: none;
}
.top-wrapper .top-menu li.search input.search {
    background: url(img/top-input-bg.png) no-repeat left;
    width: 188px;
    height: 34px;
    font-size: 12px;
    padding: 0 0 0 7px;
    color: #9fa0a0;
}
.top-wrapper .top-menu li.search input.submit {
    background: url(img/top-submit-bg.png) no-repeat left;
    width: 27px;
    height: 34px;
    padding: 0;
    text-indent: -9999px;
    outline: none;
    cursor: pointer;
}
.top-wrapper .top-menu li.fb-signin {
    padding: 2px 0 0 0;
    margin: 0;
    border: none;
}
.top-wrapper .top-menu li.fb-signin a {
    width: 90px;
    height: 30px;
    display: block;
    outline: none;
    cursor: pointer;
    background: url(img/btn-fb-signin.png) no-repeat left;
    text-indent: -9999px;
}
.top-wrapper .top-menu li.signedin {
    padding: 2px 0 0 0;
    margin: 0;
    border: none;
}
.top-wrapper .top-menu li.signedin img {
    display: inline-block;
    margin: 0 10px 0 0;
    vertical-align: top;
}
.top-wrapper .top-menu li.signedin a.menu {
    display: inline-block;
    margin: 10px 0 0 0;
}
/* REGULAR MENU DROPDOWN */
.top-wrapper .top-menu li ul {
    display: none;
    margin: 0;
    padding: 10px 0 0 -50px;
    margin: 0 0 0 -50px;
    position: absolute;
    top: 42px;
    text-align: left;
    width: 160px;
}
.top-wrapper .top-menu li ul li {
    background: none repeat scroll 0 0 #F1FAF4;
    border-bottom: 1px solid #b3c8ba;
    border-right: none;
    display: inline-block;
    float: none;
    margin: 0 0 0 -15px;
    padding: 10px 0;
    width: 160px;
    position: relative;
    z-index: 1000;
}
.top-wrapper .top-menu li ul li a {
    color: #000 !important;
    text-decoration: none;
    padding: 0 0 0 15px;
}
.top-wrapper .top-menu li ul li a:hover {
    text-decoration: underline;
}
.top-wrapper .top-menu li:hover > ul {
    background: none repeat scroll 0 0 transparent;
    display: block;
    margin: 0 0 0 0;
    padding: 10px 0 0;
}

/* USER MENU DROPDOWN */
.top-wrapper .top-menu li.signedin ul {
    display: none;
    margin: 0;
    padding: 10px 0 0;
    position: absolute;
    top: 42px;
    text-align: left;
    width: 200px;
}
.top-wrapper .top-menu li.signedin ul li {
    background: none repeat scroll 0 0 #F1FAF4;
    border-bottom: 1px solid #b3c8ba;
    border-right: none;
    display: inline-block;
    float: none;
    margin: 0;
    padding: 10px 0;
    width: 125px;
    position: relative;
    z-index: 1000;
}
.top-wrapper .top-menu li ul li.first .corner-left {
    background: url(img/menu-corner-left.png) no-repeat center;
    width: 6px;
    height: 6px;
    position: absolute;
    left: -6px;
    top: 0;
}

.top-wrapper .top-menu li ul li.first .corner-right {
    background: url(img/menu-corner-right.png) no-repeat center;
    width: 6px;
    height: 6px;
    position: absolute;
    right: -6px;
    top: 0;
}

.top-wrapper .top-menu li ul li.last {
    border-bottom-right-radius: 6px;
    border-bottom-left-radius: 6px;
    -moz-border-bottom-right-radius: 6px;
    -moz-border-bottom-left-radius: 6px;
    -webkit-border-bottom-right-radius: 6px;
    -webkit-border-bottom-left-radius: 6px;
}

.top-wrapper .top-menu li.signedin ul li a {
    color: #000 !important;
    text-decoration: none;
    padding: 0 0 0 10px;
}
.top-wrapper .top-menu li.signedin ul li a:hover {
    text-decoration: underline;
}
.top-wrapper .top-menu li.signedin:hover > ul {
    background: none repeat scroll 0 0 transparent;
    display: block;
    margin: 0 0 0 0;
    padding: 10px 0 0;
}
/* SEARCH MENU DROPDOWN */
.top-wrapper .top-menu li.search ul {
    display: none;
    margin: 0;
    padding: 10px 0 0;
    position: absolute;
    top: 42px;
    text-align: left;
    width: 222px;
}

.top-wrapper .top-menu li.search input.search:focus {outline: none; border: none;}
}

.top-wrapper .top-menu li.search ul li {
    background: none repeat scroll 0 0 #F1FAF4;
    border-bottom: 1px solid #b3c8ba;
    border-right: none;
    display: inline-block;
    float: none;
    margin: 0;
    padding: 10px 0;
    width: 222px;
    position: relative;
    z-index: 1000;
}
.top-wrapper .top-menu li.search ul li a {
    color: #000 !important;
    text-decoration: none;
    padding: 0 0 0 15px;
}
.top-wrapper .top-menu li.search ul li a:hover {
    text-decoration: underline;
}
.top-wrapper .top-menu li.search:hover > ul {
    background: none repeat scroll 0 0 transparent;
    display: block;
    margin: 0 0 0 0;
    padding: 10px 0 0;
}

</style>

...稀释

Answer 1

*:first-child+html .top-wrapper .top-menu li ul li 

这样做会有所帮助.. =）