css - 按钮 a :hover and background color

Question

我的按钮有问题。当我想点击我的按钮时，通常“蓝色”按钮的颜色应该变为黑色。

好像我的底色(黑色)不完整？？？

.more-information{
	position:absolute;
	height: 33px;
	width: 158px;
	background-color: #005dbe;
  	color: white;
  	line-height: 33px;
  	border:none;
	padding:7px 0 7px 0;
	border-radius:20px;
	text-transform: uppercase;
  	text-align: center;
  	font-weight: bold;
}

.more-information a{
  color: #f2f2f2;
  text-decoration: none;
  display: block;
  height: 100%;
  width: 100%;

}

.more-information a:hover{
  background-color: black;
  color: white;
}

<div class="more-information"><a href="#">Login</a></div>

Answer 1

我将大部分 CSS 从外部 div 移到了 <a>相反，现在它的行为符合您的预期。

.more-information{
  position:absolute;
  height: 33px;
  width: 158px;
}

.more-information a{
  color: #f2f2f2;
  text-decoration: none;
  display: block;
  background-color: #005dbe;
  color: white;
  line-height: 33px;
  border:none;
  padding:7px 0 7px 0;
  border-radius:20px;
  text-transform: uppercase;
  text-align: center;
  font-weight: bold;
}

.more-information a:hover{
  background-color: black;
  color: white;
}

<div class="more-information"><a href="#">Login</a></div>