<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Formulário | GN</title>
<link rel="stylesheet" type="text/css" href="style.css">
<style>
body{font-family: Arial, Helvetica, sans-serif;
background-image: linear-gradient(to right, rgb(20, 220, 80), rgb(17, 54, 71));
}
.box{
color: white;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background-color: rgba(0, 0, 0, 0.6);
padding: 15px;
border-radius: 15px;
width: 23%;
}
fieldset{
border: 3px solid greenyellow;
}
legend{
border: 1px solid greenyellow;
padding: 10px;
text-align: center;
background-color: greenyellow;
border-radius: 8px;
color: black;
}
.inputBox{
position: relative;
}
.inputUser{
background: none;
border: none;
border-bottom: 1px solid white;
outline: none;
color: white;
font-size: 14px;
width: 100%;
letter-spacing: 2px;
}
#submit{
background-image: linear-gradient(to right, rgb(20, 220, 80), rgb(19, 169, 195));
width: 40%;
border: none;
padding: 10px;
color: black;
font-size: 17px;
cursor: pointer;
border-radius: 10px;
text-align: center;
}
#submit1{
position: relative;
left: 60px;
background-image: linear-gradient(to right, rgb(20, 220, 80), rgb(19, 169, 195));
width: 40%;
border: none;
padding: 10px;
color: black;
font-size: 17px;
cursor: pointer;
border-radius: 10px;
text-align: center;
font-style: inherit;
}
#submit:hover{
background-image: linear-gradient(to right, rgb(20, 220, 80), rgb(7, 105, 40));
}
#submit1:hover{
background-image: linear-gradient(to right, rgb(20, 220, 80), rgb(7, 105, 40));
}
.labelInput{
position: absolute;
border: none;
pointer-events: none;
transition: .5s;
}
.inputUser:focus ~.labelInput,
.inputUser:valid ~ .labelInput{
top: -20px;
font-size: .85px;
color: greenyellow;
}
</style>
</head>
<body>
<div class="box">
<from action = "">
<fieldset>
<legend><b>Cadastro de Pacientes</b></legend>
<br>
<div class="inputbox">
<label for = "nome" class="labelInput">*<b>Nome:</b></label>
<input type="text" name="nome" id="nome" class="inputUser" required>
</div>
<br><br>
<div class="inputbox">
<label for ="email" class="labelInput"><b>Email:</b></label>
<input type="text" name="email" id="email" class="inputUser" required>
</div>
<br><br>
<div class="inputbox">
<label for ="telefone" class="labelInput">*<b>Telefone:</b></label>
<input type="text" name="telefone" id="telefone" class="inputUser" required>
</div>
<p>*<b>Sexo:</b></p>
<input type="radio" id="feminino" name="genero" value="feminino" required>
<label for="feminino">Feminino</label>
<br>
<input type="radio" id="masculino" name="genero" value="masculino" required>
<label for="masculino">Masculino</label>
<br><br><br>
<div class="inputbox">
<label for ="data_nascimento">*<b>Data de Nascimento:</b></label>
<input type="date" name="data_nascimento" id="data_nascimento" class="inputUser" required>
</div>
<br><br>
<div class="inputbox">
<label for ="cidade" class="labelInput">*<b>Cidade:</b></label>
<input type="text" name="cidade" id="cidade" class="inputUser" required>
</div>
<br><br>
<div class="inputbox">
<label for ="estado" class="labelInput">*<b>Estado:</b></label>
<input type="text" name="estado" id="estado" class="inputUser" required>
</div>
<br><br>
<div class="inputbox">
<label for ="endereco" class="labelInput"><b>Endereço:</b></label>
<input type="text" name="endereco" id="endereco" class="inputUser" required>
</div>
<br><br>
<a href="file:///home/liniquer/Formul%C3%A1rio%20/pag1.html">
<button type="button" name="submit" id="submit" value= "< Voltar">< Voltar</button>
</a>
<a href="file:///home/liniquer/Formul%C3%A1rio%20/pag2.html">
<button type="button" name="submit" id="submit1" value="Avançar >">Avançar ></button>
</a>
</fieldset>
</body>
</html>
我尝试在输入中创建一个名为 inputUser 的类，然后我尝试在标签样式中创建动画，但不起作用，我不知道为什么。 动画包括当用户点击营地文本时，标签（Nome、Email、Telefone、Cidade、Estado 和 Endereco）上升（顶部：-20px），字体大小减小到 12 px，颜色变为绿黄色。 [[在此处输入图像描述](https://i.stack.imgur.com/8gg3w.png)](https://i.stack.imgur.com/Z05NC.png)
我认为您正在寻找的是将
标签放在输入字段的顶部，直到用户处于焦点或有数据 在输入字段内。那么您希望标签位于其上方，对吗？我在下面附上了一个片段。
这是通过以下方式完成的：
input:not(:invalid) + label, input:focus + label { top: 0; opacity: 75%; font-size: 0.9rem; background: white; transition: all .2s ease-in-out; }