欢迎来到前端设计专栏，本专栏收藏了一些好看且实用的前端作品，使用简单的html、css语法打造创意有趣的作品，为网站加入更多高级创意的元素。
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="input.css">
</head>
<body>
<div class="InputBox">
<div class="Box">
<input type="text" name="" id="" class="name" placeholder="输入姓名">
<span>输入姓名</span>
</div>
</div>
</body>
</html>css
.InputBox {
display: inline-block;
position: relative;
width: 200px;
margin: 10px;
font-size: 14px;
}
.Box input {
width: 100%;
padding: 10px;
border: 1px solid rgba(255, 255, 255, 0.25);
background-color: #1a2b3d;
border-radius: 5px;
outline: none;
color: #fff;
}
.Box input:focus::placeholder {
opacity: 0;
}
.Box input:focus ~ span {
color: #00dfc4;
transform: translateX(10px) translateY(-7px);
font-size: 12px;
padding: 0 10px;
background-color: #1a2b3d;
border-left: 1px solid #00dfc4;
border-right: 1px solid #00dfc4;
letter-spacing: 4px;
}
span {
position: absolute;
top: 0;
padding: 10px;
pointer-events: none;
text-transform: uppercase;
color: rgba(255, 255, 255, 0);
transition: 0.5s;
}
