我最近用我的 CSS 导航栏解决了一个困扰我一段时间的问题。现在我遇到了将它固定到顶部的问题,以便在您滚动页面时它会向下滚动。我知道我需要添加的是 Position: fixed; 但我不知道在哪里添加它。
我最近的尝试导致文本被修复,但导航栏的背景不会。任何帮助是极大的赞赏。
我的 CSS
#cssmenu ul {
margin: 0;
padding: 0;
}
#cssmenu li {
margin: 0;
padding: 0;
}
#cssmenu a {
margin: 0;
padding: 0;
}
#cssmenu > ul {
display:table;
margin:0 auto;
}
#cssmenu ul {
list-style: none;
}
#cssmenu a {
text-decoration: none;
}
#cssmenu {
height: 70px;
background-color: #232323;
box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.4);
width: auto;
text-align: center;
}
#cssmenu > ul > li {
float: left;
margin-left: 15px;
position: relative;
}
#cssmenu > ul > li > a {
color: #a0a0a0;
font-family: Verdana, 'Lucida Grande';
font-size: 15px;
line-height: 70px;
padding: 15px 20px;
-webkit-transition: color .15s;
-moz-transition: color .15s;
-o-transition: color .15s;
transition: color .15s;
}
#cssmenu > ul > li > a:hover {
color: #ffffff;
}
#cssmenu > ul > li > ul {
opacity: 0;
visibility: hidden;
padding: 16px 0 20px 0;
background-color: #fafafa;
text-align: left;
position: absolute;
top: 55px;
left: 50%;
margin-left: -90px;
width: 180px;
-webkit-transition: all .3s .1s;
-moz-transition: all .3s .1s;
-o-transition: all .3s .1s;
transition: all .3s .1s;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
-webkit-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.4);
-moz-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.4);
box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.4);
}
#cssmenu > ul > li:hover > ul {
opacity: 1;
top: 65px;
visibility: visible;
}
#cssmenu > ul > li > ul:before {
content: '';
display: block;
border-color: transparent transparent #fafafa transparent;
border-style: solid;
border-width: 10px;
position: absolute;
top: -20px;
left: 50%;
margin-left: -10px;
}
#cssmenu > ul ul > li {
position: relative;
}
#cssmenu ul ul a {
color: #323232;
font-family: Verdana, 'Lucida Grande';
font-size: 13px;
background-color: #fafafa;
padding: 5px 8px 7px 16px;
display: block;
-webkit-transition: background-color 0.1s;
-moz-transition: background-color 0.1s;
-o-transition: background-color 0.1s;
transition: background-color 0.1s;
}
#cssmenu ul ul a:hover {
background-color: #f0f0f0;
}
#cssmenu ul ul ul {
visibility: hidden;
opacity: 0;
position: absolute;
top: -16px;
left: 206px;
padding: 16px 0 20px 0;
background-color: #fafafa;
text-align: left;
width: 180px;
-webkit-transition: all .3s;
-moz-transition: all .3s;
-o-transition: all .3s;
transition: all .3s;
-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;
-webkit-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.4);
-moz-box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.4);
box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.4);
}
#cssmenu ul ul > li:hover > ul {
opacity: 1;
left: 190px;
visibility: visible;
}
#cssmenu ul ul a:hover {
background-color: #cc2c24;
color: #f0f0f0;
}