html - 导航栏不会与内容对齐

Question

我试图创建一个 HTML 页面，但内容仅从左侧导航栏行结束的下方开始。我想让 twi 彼此并排排列。我试过 float 内容，但到目前为止还没有成功

这是我的 CSS，非常感谢任何帮助

    body
{
    margin: 0; 
    padding: 0; 
    font-family: arial, verdana, sans-serif;
    color: #000;
    background-color: #0099CC;
    background-image: url(../Images/Background.jpg);
}

#banner
{
    background-color: #87CEFA;
    border-bottom: 1px solid #333;
    text-align: center;
}
#banner h1
{
    margin: 0;
    padding: .5em;
}

#container
{
    margin: 1em 5%;
    background-color: #E0FFFF;
    background-image: url(../Images/bluebackground.jpg);
    background-repeat: repeat-y;
}

#content
{
    padding-top: 0.5em;
    margin: 0 2em 0 200px; 
    padding-bottom: 0.5em;
    float:left; 
}


#navigation {float:left; font-size:0.75em; width:178px; }
#navigation ul {margin:0px; padding:0px;}
#navigation li {list-style: none;}

ul.top-level { background:#1E90FF; }

ul.top-level li {
 border-bottom: #fff solid;
 border-top: #fff solid;
 border-width: 1.5px;

}

#navigation a {
 color: #fff;
 cursor: pointer;
 display:block;
 height:25px;
 line-height: 25px;
 text-indent: 10px;                   
 text-decoration:none;
 width:100%;
}

#navigation a:hover{
 text-decoration:underline;
}
#navigation li:hover {
 background: #f90;
 position: relative;

 }
ul.sub-level { 
    display: none;
}

li:hover .sub-level {
    background: #0000CD;
    border: #fff solid;
    border-width: 1px;
    display: block;
    position: absolute;
    left: 168px;
    top: 0px;
}

ul.sub-level li {
    border: none;
    float:left;
    width:150px;
}

#nav p
{ 
    margin-top: 0; 
}

#footer
{
    clear: both;
    background-color: #78CEFA;
    padding: 1em;
    text-align: center;
    border-top: 1px solid #333;
    font-size:1em;
}

Answer 1

尝试改变这个:

#content
{
padding-top: 0.5em;
margin: 0 2em 0 200px; 
padding-bottom: 0.5em;
float: left;
}

为此:

#content
{
padding-top: 0.5em;
margin: 0 2em 0 200px; 
padding-bottom: 0.5em;
overflow: hidden;
}

(即把float: left;改成overflow: hidden;)