效果图：
代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登陆面板旋转</title>
<style>
body {
font-family: "Microsoft YaHei", "微软雅黑"
}
.container {
/*创建3D场景*/
-webkit-perspective: 800
-webkit-perspective-origin: 50% 50%
-webkit-transform-style: -webkit-preserve-3d/*告诉浏览器以下transform操作是在3D场景下进行的*/
}
#login-panel {
/*-webkit-transform: rotateX(45deg)*/
}
.login {
width: 500px
height: 400px
margin: 100px auto
text-align: center
border: 1px solid #ABCDEF
border-radius: 10px
box-shadow: 0 0 3px 3px #ABCDEF
}
.login h1 {
margin: 50px 0
}
.login-row span {
font-size: 18px
}
.login-row input {
height: 25px
line-height: 25px
padding: 0 10px
margin: 10px 0
}
.btn {
outline: none
background-color: aliceblue
cursor: pointer
width: 90px
height: 40px
border: 1px solid #DDD
border-radius: 5px
margin: 30px 20px
font-size: 16px
transition: background-color 0.5s
-webkit-transition: background-color 0.5s
-moz-transition: background-color 0.5s
-o-transition: background-color 0.5s
}
.btn:hover {
background-color: antiquewhite
}
.login-success {
font-size: 20px
padding: 50px
}
</style>
<script>
var loginBtn, regiBtn
window.onload = function() {
loginBtn = document.getElementById("login")
loginBtn.onclick = rotate
regiBtn = document.getElementById("regi")
regiBtn.onclick = rotate
}
function rotate() {
var x = 0
var panel = document.getElementById("login-panel")
panel.style.transform = "rotateX(0deg)"
panel.style.webkitTransform = "rotateX(0deg)"
var flag = true
var timer = setInterval(function() {
if(Math.round(x) >= 90 &&flag) {
panel.innerHTML = "<p class='login-success'>登陆成功</p>"
flag = false
}
if(Math.round(x) >= 358) {
panel.style.transform = "rotateX(360deg)"
panel.style.webkitTransform = "rotateX(360deg)"
clearInterval(timer)
return false
} else {
x += 2 + (360 - x) / 60
panel.style.transform = "rotateX(" + x + "deg)"
panel.style.webkitTransform = "rotateX(" + x + "deg)"
}
}, 25)
}
</script>
</head>
<body>
<div class="container">
<div class="login" id="login-panel">
<h1>登陆</h1>
<div class="login-row">
<label for="username"><span>账号：</span></label>
<input type="text" id="username" name="username">
</div>
<div class="login-row">
<label for="password"><span>密码：</span></label>
<input type="password" id="password" name="password">
</div>
<div class="login-row">
<button id="login" class="btn" type="button">登陆</button>
<button id="regi" class="btn" type="button">注册</button>
</div>
</div>
</div>
</body>
</html>
首先，只通过HTML和CSS实现该功能是不现实的。既然是登陆操作，就得有校验吧，这个至少需要JavaScript相关代码实现。而且，真正的网页登陆操作都是与后台交互实现的，需要将数据提交到后台校验。、；其次，没有激励，如何回答？毕竟这不是几分钟就可以搞定的事吧？
当然，若你只是实现页面呈现效果，而不需要实现登陆功能的话，就简单些了，还真的就只需要HTML和css就能实现
