先上效果图：
再看代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>隐藏的链接按钮</title>
<style>
.trapdoor {
-webkit-transform: translateZ(0px);
-webkit-font-smoothing: antialiased;
position: absolute;
top: 50%;
left: 50%;
margin-left: -100px;
margin-top: -25px;
width: 200px;
height: 50px;
box-shadow: inset -7px 0px 12px -8px rgba(0, 0, 0, 0.3), inset 7px 0px 12px -8px rgba(0, 0, 0, 0.3);
background: rgba(0, 0, 0, 0.3);
-webkit-transition: background 400ms ease-in-out;
-moz-transition: background 400ms ease-in-out;
-ms-transition: background 400ms ease-in-out;
-o-transition: background 400ms ease-in-out;
transition: background 400ms ease-in-out;
}
.trapdoor:hover {
background: #fff;
}
.trapdoor:hover .door {
box-shadow: 0px 0px 10px -2px rgba(0, 0, 0, 0.4);
-webkit-transform: scale(1.08);
-moz-transform: scale(1.08);
-ms-transform: scale(1.08);
-o-transform: scale(1.08);
transform: scale(1.08);
}
.trapdoor:hover .top {
top: -50%;
}
.trapdoor:hover .bottom {
top: 100%;
}
.trapdoor .twitter-follow-button {
margin-left: -77px;
position: absolute !important;
margin-top: -14px;
left: 50%;
top: 50%;
}
.top {
top: 0%;
left: 0;
}
.top:before {
top: 5px;
}
.bottom {
top: 50%;
left: 0px;
}
.bottom:before {
top: -20px;
}
.door {
-webkit-transition: top 400ms, box-shadow 200ms, -webkit-transform 300ms;
-moz-transition: top 400ms, box-shadow 200ms, -moz-transform 300ms;
-ms-transition: top 400ms, box-shadow 200ms, -ms-transform 300ms;
-o-transition: top 400ms, box-shadow 200ms, -o-transform 300ms;
transition: top 400ms, box-shadow 200ms, transform 300ms;
-webkit-transition-timing-function: ease-in-out;
-moz-transition-timing-function: ease-in-out;
-ms-transition-timing-function: ease-in-out;
-o-transition-timing-function: ease-in-out;
transition-timing-function: ease-in-out;
background-color: #fff;
position: absolute;
overflow: hidden;
width: 100%;
z-index: 2;
height: 50%;
}
.door:before {
font-family: 'tweet', sans-serif;
position: absolute;
margin-left: -20px;
font-size: 35px;
display: block;
color: #4099FF;
content: "\2764";
width: 0;
height: 20px;
left: 52%;
}
@font-face {
font-family: 'tweet';
src: url("https://s3-us-west-2.amazonaws.com/s.cdpn.io/277/tweet.woff") format("woff");
font-weight: normal;
font-style: normal;
}
a {
color: #b3b3b4;
text-decoration: none;
}
</style>
</head>
<body>
<div class="trapdoor">
<div class="top door">
</div>
<div class="bottom door">
</div>
<a href="https://blog.csdn.net/qq_35241329?type=blog" class="twitter-follow-button" data-show-count="false" data-size="large" data-dnt="false">TiMi先生</a>
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</div>
</body>
</html>