我正在创建一个网页,当我将鼠标悬停在.Soccer部分上时,它将下拉并显示Link1,Link2,Link3.

没有position：fixed;,代码工作得非常好.
因为我想在网页的顶部标题,我把位置：固定;

但是一旦我把它打开,“足球”的下拉按钮就不起作用了.

html {
  background-image: url("Images/BackgroundImageI.jpg");
  background-repeat: no-repeat;
}

body {
  background-color: White;
  color: Black;
  margin-left: 0%;
  margin-right: 0%;
  margin-top: 40%;
  margin-bottom: 0%;
  border: 10px outset Gray;
}

h1 {
  font-family: Arial,Verdana,Geneva,sans-serrif;
  color: teal;
  text-align: center;
}

p {
  font-family: Arial,sans-serrif,serrif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
  line-height: 24px;
}

ul {
  margin-left: 0%;
  margin-right: 0%;
  margin-top: 0%;
  list-style-type: none;
  margin: 0;
  padding: 0;
  top: 0;
  width: 100%;
  overflow: hidden;
  background-color: #333;
  position: fixed;
  /* Removing this makes the dropdown work */
}

li {
  float: left;
}

li a,.dropbtn {
  display: inline-block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

li a:hover,.Soccer:hover .dropbtn {
  background-color: teal;
}

li.Soccer {
  display: inline-block;
}

.Soccer-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  Box-shadow: 0px 8px 16px 0px rgba(0,0.2);
  z-index: 1;
}

.Soccer-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.Soccer-content a:hover {
  background-color: teal
}

.Soccer:hover .Soccer-content {
  display: block;
}

Meta charset="UTF-8">