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六个好看实用的html简单登录页面小结

lightweb等级-LV4 - 小轻秀场3年前更新
190

html登录页面是每个前端的入门小知识，本文主要介绍了六个好看实用的html简单登录页面小结，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧！

html登录页面是每个前端的入门小知识，本文主要介绍了六个好看实用的html简单登录页面小结，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧！

效果一

20220426161739105

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html {
            height: 100%;
        }
        body {
            height: 100%;
        }
        .container {
            height: 100%;
            background-image: linear-gradient(to right, #fbc2eb, #a6c1ee);
        }
        .login-wrapper {
            background-color: #fff;
            width: 358px;
            height: 588px;
            border-radius: 15px;
            padding: 0 50px;
            position: relative;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }
        .header {
            font-size: 38px;
            font-weight: bold;
            text-align: center;
            line-height: 200px;
        }
        .input-item {
            display: block;
            width: 100%;
            margin-bottom: 20px;
            border: 0;
            padding: 10px;
            border-bottom: 1px solid rgb(128, 125, 125);
            font-size: 15px;
            outline: none;
        }
        .input-item:placeholder {
            text-transform: uppercase;
        }
        .btn {
            text-align: center;
            padding: 10px;
            width: 100%;
            margin-top: 40px;
            background-image: linear-gradient(to right, #a6c1ee, #fbc2eb);
            color: #fff;
        }
        .msg {
            text-align: center;
            line-height: 88px;
        }
        a {
            text-decoration-line: none;
            color: #abc1ee;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="login-wrapper">
            <div class="header">Login</div>
            <div class="form-wrapper">
                <input type="text" name="username" placeholder="username" class="input-item">
                <input type="password" name="password" placeholder="password" class="input-item">
                <div class="btn">Login</div>
            </div>
            <div class="msg">
                Don't have account?
                <a href="#">Sign up</a>
            </div>
        </div>
    </div>
</body>
</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>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html {
            height: 100%;
        }
        body {
            height: 100%;
        }
        .container {
            height: 100%;
            background-image: linear-gradient(to right, #fbc2eb, #a6c1ee);
        }
        .login-wrapper {
            background-color: #fff;
            width: 358px;
            height: 588px;
            border-radius: 15px;
            padding: 0 50px;
            position: relative;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }
        .header {
            font-size: 38px;
            font-weight: bold;
            text-align: center;
            line-height: 200px;
        }
        .input-item {
            display: block;
            width: 100%;
            margin-bottom: 20px;
            border: 0;
            padding: 10px;
            border-bottom: 1px solid rgb(128, 125, 125);
            font-size: 15px;
            outline: none;
        }
        .input-item:placeholder {
            text-transform: uppercase;
        }
        .btn {
            text-align: center;
            padding: 10px;
            width: 100%;
            margin-top: 40px;
            background-image: linear-gradient(to right, #a6c1ee, #fbc2eb);
            color: #fff;
        }
        .msg {
            text-align: center;
            line-height: 88px;
        }
        a {
            text-decoration-line: none;
            color: #abc1ee;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="login-wrapper">
            <div class="header">Login</div>
            <div class="form-wrapper">
                <input type="text" name="username" placeholder="username" class="input-item">
                <input type="password" name="password" placeholder="password" class="input-item">
                <div class="btn">Login</div>
            </div>
            <div class="msg">
                Don't have account?
                <a href="#">Sign up</a>
            </div>
        </div>
    </div>
</body>
</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>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html {
            height: 100%;
        }
        body {
            height: 100%;
        }
        .container {
            height: 100%;
            background-image: linear-gradient(to right, #fbc2eb, #a6c1ee);
        }
        .login-wrapper {
            background-color: #fff;
            width: 358px;
            height: 588px;
            border-radius: 15px;
            padding: 0 50px;
            position: relative;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }
        .header {
            font-size: 38px;
            font-weight: bold;
            text-align: center;
            line-height: 200px;
        }
        .input-item {
            display: block;
            width: 100%;
            margin-bottom: 20px;
            border: 0;
            padding: 10px;
            border-bottom: 1px solid rgb(128, 125, 125);
            font-size: 15px;
            outline: none;
        }
        .input-item:placeholder {
            text-transform: uppercase;
        }
        .btn {
            text-align: center;
            padding: 10px;
            width: 100%;
            margin-top: 40px;
            background-image: linear-gradient(to right, #a6c1ee, #fbc2eb);
            color: #fff;
        }
        .msg {
            text-align: center;
            line-height: 88px;
        }
        a {
            text-decoration-line: none;
            color: #abc1ee;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="login-wrapper">
            <div class="header">Login</div>
            <div class="form-wrapper">
                <input type="text" name="username" placeholder="username" class="input-item">
                <input type="password" name="password" placeholder="password" class="input-item">
                <div class="btn">Login</div>
            </div>
            <div class="msg">
                Don't have account?
                <a href="#">Sign up</a>
            </div>
        </div>
    </div>
</body>
</html>

效果二

20220426161739106

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            height: 100%;
            height: 100%;
        }
        .login {
            width: 358px;
            height: 588px;
            border-radius: 15px;
            padding: 0 50px;
            position: relative;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            background-color: #282c34;
        }
        .header {
            font-size: 38px;
            font-weight: bold;
            text-align: center;
            line-height: 200px;
            color: #61dafb;
        }
        .container {
            height: 30px;
            width: 250px;
            position: absolute;
            left: 50%;
            top: 40%;
            transform: translate(-50%, -50%);
        }
        input {
            width: 100%;
            height: 100%;
            position: relative;
            outline: none;
            border: none;
            box-sizing: border-box;
            padding-left: 5px;
            background-color: #282c34;
            color: #61dafb;
            caret-color: #61dafb;
        }
        input::placeholder {
            color: #61dafb;
        }
        span {
            position: absolute;
            content: "";
            display: block;
            background-color: #61dafb;
            transition: transform .1s ease-in-out;
        }
        .top,
        .bottom {
            left: 0px;
            right: 0px;
            height: 2px;
        }
        .left,
        .right {
            top: 0px;
            bottom: 0px;
            width: 2px;
            transform: scaleY(0);
        }
        .top {
            top: 0px;
            transform: scaleX(0);
            transform-origin: left center;
            transition-delay: .2s;
        }
        .left {
            left: 0px;
            transform-origin: bottom center;
            transition-delay: .3s;
        }
        .bottom {
            bottom: 0px;
        }
        .right {
            right: 0px;
            transform-origin: top center;
            transition-delay: .1s;
        }
        input:focus ~ .right {
            transform: scaleY(1);
            transform-origin: bottom center;
        }
        input:focus ~ .left {
            transform: scaleY(1);
            transform-origin: top center;
        }
        input:focus ~ .top {
            transform: scaleY(1);
            transform-origin: right center;
        }
        .container1 {
            height: 30px;
            width: 250px;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }
        .btn {
            position: absolute;
            left: 50%;
            top: 54%;
            transform: translate(-50%, -50%);
            text-align: center;
            padding: 5px;
            width: 52%;
            margin-top: 40px;
            background-color: #61dafb;
            color: #fff;
        }
    </style>
</head>
<body>
    <div class="login">
        <div class="header">登录</div>
        <div class="container">
            <input type="text" placeholder="请输入用户名">
            <span class="left"></span>
            <span class="right"></span>
            <span class="top"></span>
            <span class="bottom"></span>
        </div>
        <div class="container1">
            <input type="password" placeholder="请输入密码">
            <span class="left"></span>
            <span class="right"></span>
            <span class="top"></span>
            <span class="bottom"></span>
        </div>
        <div class="btn">登录</div>
    </div>
</body>
</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>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            height: 100%;
            height: 100%;
        }
        .login {
            width: 358px;
            height: 588px;
            border-radius: 15px;
            padding: 0 50px;
            position: relative;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            background-color: #282c34;
        }
        .header {
            font-size: 38px;
            font-weight: bold;
            text-align: center;
            line-height: 200px;
            color: #61dafb;
        }
        .container {
            height: 30px;
            width: 250px;
            position: absolute;
            left: 50%;
            top: 40%;
            transform: translate(-50%, -50%);
        }

        input {
            width: 100%;
            height: 100%;
            position: relative;
            outline: none;
            border: none;
            box-sizing: border-box;
            padding-left: 5px;
            background-color: #282c34;
            color: #61dafb;
            caret-color: #61dafb;
        }
        input::placeholder {
            color: #61dafb;
        }

        span {
            position: absolute;
            content: "";
            display: block;
            background-color: #61dafb;
            transition: transform .1s ease-in-out;
        }
        .top,
        .bottom {
            left: 0px;
            right: 0px;
            height: 2px;
        }
        .left,
        .right {
            top: 0px;
            bottom: 0px;
            width: 2px;
            transform: scaleY(0);
        }
        .top {
            top: 0px;
            transform: scaleX(0);
            transform-origin: left center;
            transition-delay: .2s;
        }
        .left {
            left: 0px;
            transform-origin: bottom center;
            transition-delay: .3s;
        }
        .bottom {
            bottom: 0px;
        }
        .right {
            right: 0px;
            transform-origin: top center;
            transition-delay: .1s;
        }
        input:focus ~ .right {
            transform: scaleY(1);
            transform-origin: bottom center;
        }
        input:focus ~ .left {
            transform: scaleY(1);
            transform-origin: top center;
        }
        input:focus ~ .top {
            transform: scaleY(1);
            transform-origin: right center;
        }
        .container1 {
            height: 30px;
            width: 250px;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }
        .btn {
            position: absolute;
            left: 50%;
            top: 54%;
            transform: translate(-50%, -50%);
            text-align: center;
            padding: 5px;
            width: 52%;
            margin-top: 40px;
            background-color: #61dafb;
            color: #fff;
        }
    </style>
</head>
<body>
    <div class="login">
        <div class="header">登录</div>
        <div class="container">
            <input type="text" placeholder="请输入用户名">
            <span class="left"></span>
            <span class="right"></span>
            <span class="top"></span>
            <span class="bottom"></span>
        </div>
        <div class="container1">
            <input type="password" placeholder="请输入密码">
            <span class="left"></span>
            <span class="right"></span>
            <span class="top"></span>
            <span class="bottom"></span>
        </div>
        <div class="btn">登录</div>
    </div>
</body>
</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>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        html, body {
            height: 100%;
            height: 100%;
        }
        .login {
            width: 358px;
            height: 588px;
            border-radius: 15px;
            padding: 0 50px;
            position: relative;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            background-color: #282c34;
        }
        .header {
            font-size: 38px;
            font-weight: bold;
            text-align: center;
            line-height: 200px;
            color: #61dafb;
        }
        .container {
            height: 30px;
            width: 250px;
            position: absolute;
            left: 50%;
            top: 40%;
            transform: translate(-50%, -50%);
        }

        input {
            width: 100%;
            height: 100%;
            position: relative;
            outline: none;
            border: none;
            box-sizing: border-box;
            padding-left: 5px;
            background-color: #282c34;
            color: #61dafb;
            caret-color: #61dafb;
        }
        input::placeholder {
            color: #61dafb;
        }

        span {
            position: absolute;
            content: "";
            display: block;
            background-color: #61dafb;
            transition: transform .1s ease-in-out;
        }
        .top,
        .bottom {
            left: 0px;
            right: 0px;
            height: 2px;
        }
        .left,
        .right {
            top: 0px;
            bottom: 0px;
            width: 2px;
            transform: scaleY(0);
        }
        .top {
            top: 0px;
            transform: scaleX(0);
            transform-origin: left center;
            transition-delay: .2s;
        }
        .left {
            left: 0px;
            transform-origin: bottom center;
            transition-delay: .3s;
        }
        .bottom {
            bottom: 0px;
        }
        .right {
            right: 0px;
            transform-origin: top center;
            transition-delay: .1s;
        }
        input:focus ~ .right {
            transform: scaleY(1);
            transform-origin: bottom center;
        }
        input:focus ~ .left {
            transform: scaleY(1);
            transform-origin: top center;
        }
        input:focus ~ .top {
            transform: scaleY(1);
            transform-origin: right center;
        }
        .container1 {
            height: 30px;
            width: 250px;
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
        }
        .btn {
            position: absolute;
            left: 50%;
            top: 54%;
            transform: translate(-50%, -50%);
            text-align: center;
            padding: 5px;
            width: 52%;
            margin-top: 40px;
            background-color: #61dafb;
            color: #fff;
        }
    </style>
</head>
<body>
    <div class="login">
        <div class="header">登录</div>
        <div class="container">
            <input type="text" placeholder="请输入用户名">
            <span class="left"></span>
            <span class="right"></span>
            <span class="top"></span>
            <span class="bottom"></span>
        </div>
        <div class="container1">
            <input type="password" placeholder="请输入密码">
            <span class="left"></span>
            <span class="right"></span>
            <span class="top"></span>
            <span class="bottom"></span>
        </div>
        <div class="btn">登录</div>
    </div>
</body>
</html>

效果三

20220426161740107

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    body {
      background: url('https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg') no-repeat;
      background-size: 100% 130%;
    }
    #login_box {
      width: 20%;
      height: 400px;
      background-color: #00000060;
      margin: auto;
      margin-top: 10%;
      text-align: center;
      border-radius: 10px;
      padding: 50px 50px;
    }
    h2 {
      color: #ffffff90;
      margin-top: 5%;
    }
    #input-box {
      margin-top: 5%;
    }
    span {
      color: #fff;
    }
    input {
      border: 0;
      width: 60%;
      font-size: 15px;
      color: #fff;
      background: transparent;
      border-bottom: 2px solid #fff;
      padding: 5px 10px;
      outline: none;
      margin-top: 10px;
    }
    button {
      margin-top: 50px;
      width: 60%;
      height: 30px;
      border-radius: 10px;
      border: 0;
      color: #fff;
      text-align: center;
      line-height: 30px;
      font-size: 15px;
      background-image: linear-gradient(to right, #30cfd0, #330867);
    }
    #sign_up {
      margin-top: 45%;
      margin-left: 60%;
    }
    a {
      color: #b94648;
    }
  </style>
</head>
<body>
  <div id="login_box">
    <h2>LOGIN</h2>
    <div id="input_box">
      <input type="text" placeholder="请输入用户名">
    </div>
    <div class="input_box">
      <input type="password" placeholder="请输入密码">
    </div>
    <button>登录</button><br>
  </div>
</body>
</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>
  <style>
    body {
      background: url('https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg') no-repeat;
      background-size: 100% 130%;
    }

    #login_box {
      width: 20%;
      height: 400px;
      background-color: #00000060;
      margin: auto;
      margin-top: 10%;
      text-align: center;
      border-radius: 10px;
      padding: 50px 50px;
    }

    h2 {
      color: #ffffff90;
      margin-top: 5%;
    }

    #input-box {
      margin-top: 5%;
    }

    span {
      color: #fff;
    }

    input {
      border: 0;
      width: 60%;
      font-size: 15px;
      color: #fff;
      background: transparent;
      border-bottom: 2px solid #fff;
      padding: 5px 10px;
      outline: none;
      margin-top: 10px;
    }

    button {
      margin-top: 50px;
      width: 60%;
      height: 30px;
      border-radius: 10px;
      border: 0;
      color: #fff;
      text-align: center;
      line-height: 30px;
      font-size: 15px;
      background-image: linear-gradient(to right, #30cfd0, #330867);
    }

    #sign_up {
      margin-top: 45%;
      margin-left: 60%;
    }

    a {
      color: #b94648;
    }
  </style>
</head>

<body>
  <div id="login_box">
    <h2>LOGIN</h2>
    <div id="input_box">
      <input type="text" placeholder="请输入用户名">
    </div>
    <div class="input_box">
      <input type="password" placeholder="请输入密码">
    </div>
    <button>登录</button><br>
  </div>
</body>
</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>
  <style>
    body {
      background: url('https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg') no-repeat;
      background-size: 100% 130%;
    }

    #login_box {
      width: 20%;
      height: 400px;
      background-color: #00000060;
      margin: auto;
      margin-top: 10%;
      text-align: center;
      border-radius: 10px;
      padding: 50px 50px;
    }

    h2 {
      color: #ffffff90;
      margin-top: 5%;
    }

    #input-box {
      margin-top: 5%;
    }

    span {
      color: #fff;
    }

    input {
      border: 0;
      width: 60%;
      font-size: 15px;
      color: #fff;
      background: transparent;
      border-bottom: 2px solid #fff;
      padding: 5px 10px;
      outline: none;
      margin-top: 10px;
    }

    button {
      margin-top: 50px;
      width: 60%;
      height: 30px;
      border-radius: 10px;
      border: 0;
      color: #fff;
      text-align: center;
      line-height: 30px;
      font-size: 15px;
      background-image: linear-gradient(to right, #30cfd0, #330867);
    }

    #sign_up {
      margin-top: 45%;
      margin-left: 60%;
    }

    a {
      color: #b94648;
    }
  </style>
</head>

<body>
  <div id="login_box">
    <h2>LOGIN</h2>
    <div id="input_box">
      <input type="text" placeholder="请输入用户名">
    </div>
    <div class="input_box">
      <input type="password" placeholder="请输入密码">
    </div>
    <button>登录</button><br>
  </div>
</body>
</html>

效果四

20220426161740108

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        html {
            height: 100%;
        }
        body {
            background-image: linear-gradient(to bottom right, rgb(114, 135, 254), rgb(130, 88, 186));
        }
        .login-container {
            width: 600px;
            height: 315px;
            margin: 0 auto;
            margin-top: 10%;
            border-radius: 15px;
            box-shadow: 0 10px 50px 0px rbg(59, 45, 159);
            background-color: rgb(95, 76, 194);
        }
        .left-container {
            display: inline-block;
            width: 330px;
            border-top-left-radius: 15px;
            border-bottom-left-radius: 15px;
            padding: 60px;
            background-image: linear-gradient(to bottom right, rgb(118, 76, 163), rgb(92, 103, 211));
        }
        .title {
            color: #fff;
            font-size: 18px;
            font-weight: 200;
        }
        .title span {
            border-bottom: 3px solid rgb(237, 221, 22);
        }
        .input-container {
            padding: 20px 0;
        }
        input {
            border: 0;
            background: none;
            outline: none;
            color: #fff;
            margin: 20px 0;
            display: block;
            width: 100%;
            padding: 5px 0;
            transition: .2s;
            border-bottom: 1px solid rgb(199, 191, 219);
        }
        input:hover {
            border-bottom-color: #fff;
        }
        ::-webkit-input-placeholder {
            color: rgb(199, 191, 219);
        }
        .message-container {
            font-size: 14px;
            transition: .2s;
            color: rgb(199, 191, 219);
            cursor: pointer;
        }
        .message-container:hover {
            color: #fff;
        }
        .right-container {
            width: 145px;
            display: inline-block;
            height: calc(100% - 120px);
            vertical-align: top;
            padding: 60px 0;
        }
        .regist-container {
            text-align: center;
            color: #fff;
            font-size: 18px;
            font-weight: 200;
        }
        .regist-container span {
            border-bottom: 3px solid rgb(237, 221, 22);
        }
        .action-container {
            font-size: 10px;
            color: #fff;
            text-align: center;
            position: relative;
            top: 200px;
        }
        .action-container span {
            border: 1px solid rgb(237, 221, 22);
            padding: 10px;
            display: inline;
            line-height: 20px;
            border-radius: 20px;
            position: absolute;
            bottom: 10px;
            left: calc(72px - 20px);
            transition: .2s;
            cursor: pointer;
        }
        .action-container span:hover {
            background-color: rgb(237, 221, 22);
            color: rgb(95, 76, 194);
        }
    </style>
</head>
<body>
    <div class="login-container">
        <div class="left-container">
            <div class="title"><span>登录</span></div>
            <div class="input-container">
                <input type="text" name="username" placeholder="用户名">
                <input type="password" name="password" placeholder="密码">
            </div>
            <div class="message-container">
                <span>忘记密码</span>
            </div>
        </div>
        <div class="right-container">
            <div class="regist-container">
                <span class="regist">注册</span>
            </div>
            <div class="action-container">
                <span>提交</span>
            </div>
        </div>
    </div>
</body>
</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>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        html {
            height: 100%;
        }
        body {
            background-image: linear-gradient(to bottom right, rgb(114, 135, 254), rgb(130, 88, 186));
        }
        .login-container {
            width: 600px;
            height: 315px;
            margin: 0 auto;
            margin-top: 10%;
            border-radius: 15px;
            box-shadow: 0 10px 50px 0px rbg(59, 45, 159);
            background-color: rgb(95, 76, 194);
        }
        .left-container {
            display: inline-block;
            width: 330px;
            border-top-left-radius: 15px;
            border-bottom-left-radius: 15px;
            padding: 60px;
            background-image: linear-gradient(to bottom right, rgb(118, 76, 163), rgb(92, 103, 211));
        }
        .title {
            color: #fff;
            font-size: 18px;
            font-weight: 200;
        }
        .title span {
            border-bottom: 3px solid rgb(237, 221, 22);
        }
        .input-container {
            padding: 20px 0;
        }
        input {
            border: 0;
            background: none;
            outline: none;
            color: #fff;
            margin: 20px 0;
            display: block;
            width: 100%;
            padding: 5px 0;
            transition: .2s;
            border-bottom: 1px solid rgb(199, 191, 219);
        }
        input:hover {
            border-bottom-color: #fff;
        }
        ::-webkit-input-placeholder {
            color: rgb(199, 191, 219);
        }
        .message-container {
            font-size: 14px;
            transition: .2s;
            color: rgb(199, 191, 219);
            cursor: pointer;
        }
        .message-container:hover {
            color: #fff;
        }
        .right-container {
            width: 145px;
            display: inline-block;
            height: calc(100% - 120px);
            vertical-align: top;
            padding: 60px 0;
        }
        .regist-container {
            text-align: center;
            color: #fff;
            font-size: 18px;
            font-weight: 200;
        }
        .regist-container span {
            border-bottom: 3px solid rgb(237, 221, 22);
        }
        .action-container {
            font-size: 10px;
            color: #fff;
            text-align: center;
            position: relative;
            top: 200px;
        }
        .action-container span {
            border: 1px solid rgb(237, 221, 22);
            padding: 10px;
            display: inline;
            line-height: 20px;
            border-radius: 20px;
            position: absolute;
            bottom: 10px;
            left: calc(72px - 20px);
            transition: .2s;
            cursor: pointer;
        }
        .action-container span:hover {
            background-color: rgb(237, 221, 22);
            color: rgb(95, 76, 194);
        }
    </style>
</head>
<body>
    <div class="login-container">
        <div class="left-container">
            <div class="title"><span>登录</span></div>
            <div class="input-container">
                <input type="text" name="username" placeholder="用户名">
                <input type="password" name="password" placeholder="密码">
            </div>
            <div class="message-container">
                <span>忘记密码</span>
            </div>
        </div>
        <div class="right-container">
            <div class="regist-container">
                <span class="regist">注册</span>
            </div>
            <div class="action-container">
                <span>提交</span>
            </div>
        </div>
    </div>
</body>
</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>
    <style>
        * {
            padding: 0;
            margin: 0;
        }
        html {
            height: 100%;
        }
        body {
            background-image: linear-gradient(to bottom right, rgb(114, 135, 254), rgb(130, 88, 186));
        }
        .login-container {
            width: 600px;
            height: 315px;
            margin: 0 auto;
            margin-top: 10%;
            border-radius: 15px;
            box-shadow: 0 10px 50px 0px rbg(59, 45, 159);
            background-color: rgb(95, 76, 194);
        }
        .left-container {
            display: inline-block;
            width: 330px;
            border-top-left-radius: 15px;
            border-bottom-left-radius: 15px;
            padding: 60px;
            background-image: linear-gradient(to bottom right, rgb(118, 76, 163), rgb(92, 103, 211));
        }
        .title {
            color: #fff;
            font-size: 18px;
            font-weight: 200;
        }
        .title span {
            border-bottom: 3px solid rgb(237, 221, 22);
        }
        .input-container {
            padding: 20px 0;
        }
        input {
            border: 0;
            background: none;
            outline: none;
            color: #fff;
            margin: 20px 0;
            display: block;
            width: 100%;
            padding: 5px 0;
            transition: .2s;
            border-bottom: 1px solid rgb(199, 191, 219);
        }
        input:hover {
            border-bottom-color: #fff;
        }
        ::-webkit-input-placeholder {
            color: rgb(199, 191, 219);
        }
        .message-container {
            font-size: 14px;
            transition: .2s;
            color: rgb(199, 191, 219);
            cursor: pointer;
        }
        .message-container:hover {
            color: #fff;
        }
        .right-container {
            width: 145px;
            display: inline-block;
            height: calc(100% - 120px);
            vertical-align: top;
            padding: 60px 0;
        }
        .regist-container {
            text-align: center;
            color: #fff;
            font-size: 18px;
            font-weight: 200;
        }
        .regist-container span {
            border-bottom: 3px solid rgb(237, 221, 22);
        }
        .action-container {
            font-size: 10px;
            color: #fff;
            text-align: center;
            position: relative;
            top: 200px;
        }
        .action-container span {
            border: 1px solid rgb(237, 221, 22);
            padding: 10px;
            display: inline;
            line-height: 20px;
            border-radius: 20px;
            position: absolute;
            bottom: 10px;
            left: calc(72px - 20px);
            transition: .2s;
            cursor: pointer;
        }
        .action-container span:hover {
            background-color: rgb(237, 221, 22);
            color: rgb(95, 76, 194);
        }
    </style>
</head>
<body>
    <div class="login-container">
        <div class="left-container">
            <div class="title"><span>登录</span></div>
            <div class="input-container">
                <input type="text" name="username" placeholder="用户名">
                <input type="password" name="password" placeholder="密码">
            </div>
            <div class="message-container">
                <span>忘记密码</span>
            </div>
        </div>
        <div class="right-container">
            <div class="regist-container">
                <span class="regist">注册</span>
            </div>
            <div class="action-container">
                <span>提交</span>
            </div>
        </div>
    </div>
</body>
</html>

效果五

20220426161740109

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    a {
      text-decoration: none;
    }
    input,
    button {
      background: transparent;
      border: 0;
      outline: none;
    }
    body {
      height: 100vh;
      background: linear-gradient(#141e30, #243b55);
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 16px;
      color: #03e9f4;
    }
    .loginBox {
      width: 400px;
      height: 364px;
      background-color: #0c1622;
      margin: 100px auto;
      border-radius: 10px;
      box-shadow: 0 15px 25px 0 rgba(0, 0, 0, .6);
      padding: 40px;
      box-sizing: border-box;
    }
    h2 {
      text-align: center;
      color: aliceblue;
      margin-bottom: 30px;
      font-family: 'Courier New', Courier, monospace;
    }
    .item {
      height: 45px;
      border-bottom: 1px solid #fff;
      margin-bottom: 40px;
      position: relative;
    }
    .item input {
      width: 100%;
      height: 100%;
      color: #fff;
      padding-top: 20px;
      box-sizing: border-box;
    }
    .item input:focus+label,
    .item input:valid+label {
      top: 0px;
      font-size: 2px;
    }
    .item label {
      position: absolute;
      left: 0;
      top: 12px;
      transition: all 0.5s linear;
    }
    .btn {
      padding: 10px 20px;
      margin-top: 30px;
      color: #03e9f4;
      position: relative;
      overflow: hidden;
      text-transform: uppercase;
      letter-spacing: 2px;
      left: 35%;
    }
    .btn:hover {
      border-radius: 5px;
      color: #fff;
      background: #03e9f4;
      box-shadow: 0 0 5px 0 #03e9f4,
        0 0 25px 0 #03e9f4,
        0 0 50px 0 #03e9f4,
        0 0 100px 0 #03e9f4;
      transition: all 1s linear;
    }
    .btn>span {
      position: absolute;
    }
    .btn>span:nth-child(1) {
      width: 100%;
      height: 2px;
      background: -webkit-linear-gradient(left, transparent, #03e9f4);
      left: -100%;
      top: 0px;
      animation: line1 1s linear infinite;
    }
    @keyframes line1 {
      50%,
      100% {
        left: 100%;
      }
    }
    .btn>span:nth-child(2) {
      width: 2px;
      height: 100%;
      background: -webkit-linear-gradient(top, transparent, #03e9f4);
      right: 0px;
      top: -100%;
      animation: line2 1s 0.25s linear infinite;
    }
    @keyframes line2 {
      50%,
      100% {
        top: 100%;
      }
    }
    .btn>span:nth-child(3) {
      width: 100%;
      height: 2px;
      background: -webkit-linear-gradient(left, #03e9f4, transparent);
      left: 100%;
      bottom: 0px;
      animation: line3 1s 0.75s linear infinite;
    }
    @keyframes line3 {
      50%,
      100% {
        left: -100%;
      }
    }
    .btn>span:nth-child(4) {
      width: 2px;
      height: 100%;
      background: -webkit-linear-gradient(top, transparent, #03e9f4);
      left: 0px;
      top: 100%;
      animation: line4 1s 1s linear infinite;
    }
    @keyframes line4 {
      50%,
      100% {
        top: -100%;
      }
    }
  </style>
</head>
<body>
  <div class="loginBox">
    <h2>login</h2>
    <form action="">
      <div class="item">
        <input type="text" required>
        <label for="">userName</label>
      </div>
      <div class="item">
        <input type="password" required>
        <label for="">password</label>
      </div>
      <button class="btn">submit
        <span></span>
        <span></span>
        <span></span>
        <span></span>
      </button>
    </form>
  </div>
</body>
</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>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    a {
      text-decoration: none;
    }

    input,
    button {
      background: transparent;
      border: 0;
      outline: none;
    }

    body {
      height: 100vh;
      background: linear-gradient(#141e30, #243b55);
      display: flex;
      justify-content: center;
      align-items: center;
      font-size: 16px;
      color: #03e9f4;
    }

    .loginBox {
      width: 400px;
      height: 364px;
      background-color: #0c1622;
      margin: 100px auto;
      border-radius: 10px;
      box-shadow: 0 15px 25px 0 rgba(0, 0, 0, .6);
      padding: 40px;
      box-sizing: border-box;
    }

    h2 {
      text-align: center;
      color: aliceblue;
      margin-bottom: 30px;
      font-family: 'Courier New', Courier, monospace;
    }

    .item {
      height: 45px;
      border-bottom: 1px solid #fff;
      margin-bottom: 40px;
      position: relative;
    }

    .item input {
      width: 100%;
      height: 100%;
      color: #fff;
      padding-top: 20px;
      box-sizing: border-box;
    }

    .item input:focus+label,
    .item input:valid+label {
      top: 0px;
      font-size: 2px;
    }

    .item label {
      position: absolute;
      left: 0;
      top: 12px;
      transition: all 0.5s linear;
    }

    .btn {
      padding: 10px 20px;
      margin-top: 30px;
      color: #03e9f4;
      position: relative;
      overflow: hidden;
      text-transform: uppercase;
      letter-spacing: 2px;
      left: 35%;
    }

    .btn:hover {
      border-radius: 5px;
      color: #fff;
      background: #03e9f4;
      box-shadow: 0 0 5px 0 #03e9f4,
        0 0 25px 0 #03e9f4,
        0 0 50px 0 #03e9f4,
        0 0 100px 0 #03e9f4;
      transition: all 1s linear;
    }

    .btn>span {
      position: absolute;
    }

    .btn>span:nth-child(1) {
      width: 100%;
      height: 2px;
      background: -webkit-linear-gradient(left, transparent, #03e9f4);
      left: -100%;
      top: 0px;
      animation: line1 1s linear infinite;
    }

    @keyframes line1 {

      50%,
      100% {
        left: 100%;
      }
    }

    .btn>span:nth-child(2) {
      width: 2px;
      height: 100%;
      background: -webkit-linear-gradient(top, transparent, #03e9f4);
      right: 0px;
      top: -100%;
      animation: line2 1s 0.25s linear infinite;
    }

    @keyframes line2 {

      50%,
      100% {
        top: 100%;
      }
    }

    .btn>span:nth-child(3) {
      width: 100%;
      height: 2px;
      background: -webkit-linear-gradient(left, #03e9f4, transparent);
      left: 100%;
      bottom: 0px;
      animation: line3 1s 0.75s linear infinite;
    }

    @keyframes line3 {

      50%,
      100% {
        left: -100%;
      }
    }

    .btn>span:nth-child(4) {
      width: 2px;
      height: 100%;
      background: -webkit-linear-gradient(top, transparent, #03e9f4);
      left: 0px;
      top: 100%;
      animation: line4 1s 1s linear infinite;
    }

    @keyframes line4 {

      50%,
      100% {
        top: -100%;
      }
    }
  </style>
</head>

<body>
  <div class="loginBox">
    <h2>login</h2>
    <form action="">
      <div class="item">
        <input type="text" required>
        <label for="">userName</label>
      </div>
      <div class="item">
        <input type="password" required>
        <label for="">password</label>
      </div>
      <button class="btn">submit
        <span></span>
        <span></span>
        <span></span>
        <span></span>
      </button>
    </form>
  </div>
</body>
</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>
	<style>
		* {
			margin: 0;
			padding: 0;
		}

		a {
			text-decoration: none;
		}

		input,
		button {
			background: transparent;
			border: 0;
			outline: none;
		}

		body {
			height: 100vh;
			background: linear-gradient(#141e30, #243b55);
			display: flex;
			justify-content: center;
			align-items: center;
			font-size: 16px;
			color: #03e9f4;
		}

		.loginBox {
			width: 400px;
			height: 364px;
			background-color: #0c1622;
			margin: 100px auto;
			border-radius: 10px;
			box-shadow: 0 15px 25px 0 rgba(0, 0, 0, .6);
			padding: 40px;
			box-sizing: border-box;
		}

		h2 {
			text-align: center;
			color: aliceblue;
			margin-bottom: 30px;
			font-family: 'Courier New', Courier, monospace;
		}

		.item {
			height: 45px;
			border-bottom: 1px solid #fff;
			margin-bottom: 40px;
			position: relative;
		}

		.item input {
			width: 100%;
			height: 100%;
			color: #fff;
			padding-top: 20px;
			box-sizing: border-box;
		}

		.item input:focus+label,
		.item input:valid+label {
			top: 0px;
			font-size: 2px;
		}

		.item label {
			position: absolute;
			left: 0;
			top: 12px;
			transition: all 0.5s linear;
		}

		.btn {
			padding: 10px 20px;
			margin-top: 30px;
			color: #03e9f4;
			position: relative;
			overflow: hidden;
			text-transform: uppercase;
			letter-spacing: 2px;
			left: 35%;
		}

		.btn:hover {
			border-radius: 5px;
			color: #fff;
			background: #03e9f4;
			box-shadow: 0 0 5px 0 #03e9f4,
				0 0 25px 0 #03e9f4,
				0 0 50px 0 #03e9f4,
				0 0 100px 0 #03e9f4;
			transition: all 1s linear;
		}

		.btn>span {
			position: absolute;
		}

		.btn>span:nth-child(1) {
			width: 100%;
			height: 2px;
			background: -webkit-linear-gradient(left, transparent, #03e9f4);
			left: -100%;
			top: 0px;
			animation: line1 1s linear infinite;
		}

		@keyframes line1 {

			50%,
			100% {
				left: 100%;
			}
		}

		.btn>span:nth-child(2) {
			width: 2px;
			height: 100%;
			background: -webkit-linear-gradient(top, transparent, #03e9f4);
			right: 0px;
			top: -100%;
			animation: line2 1s 0.25s linear infinite;
		}

		@keyframes line2 {

			50%,
			100% {
				top: 100%;
			}
		}

		.btn>span:nth-child(3) {
			width: 100%;
			height: 2px;
			background: -webkit-linear-gradient(left, #03e9f4, transparent);
			left: 100%;
			bottom: 0px;
			animation: line3 1s 0.75s linear infinite;
		}

		@keyframes line3 {

			50%,
			100% {
				left: -100%;
			}
		}

		.btn>span:nth-child(4) {
			width: 2px;
			height: 100%;
			background: -webkit-linear-gradient(top, transparent, #03e9f4);
			left: 0px;
			top: 100%;
			animation: line4 1s 1s linear infinite;
		}

		@keyframes line4 {

			50%,
			100% {
				top: -100%;
			}
		}
	</style>
</head>

<body>
	<div class="loginBox">
		<h2>login</h2>
		<form action="">
			<div class="item">
				<input type="text" required>
				<label for="">userName</label>
			</div>
			<div class="item">
				<input type="password" required>
				<label for="">password</label>
			</div>
			<button class="btn">submit
				<span></span>
				<span></span>
				<span></span>
				<span></span>
			</button>
		</form>
	</div>
</body>
</html>

效果六

20220426161741110

<!DOCTYPE html>
<html lang="en">
<!-- https://codepen.io/danielkvist/pen/LYNVyPL -->
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    :root {
      /* COLORS */
      --white: #e9e9e9;
      --gray: #333;
      --blue: #0367a6;
      --lightblue: #008997;
      /* RADII */
      --button-radius: 0.7rem;
      /* SIZES */
      --max-width: 758px;
      --max-height: 420px;
      font-size: 16px;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    }
    body {
      align-items: center;
      background-color: var(--white);
      background: url("https://res.cloudinary.com/dbhnlktrv/image/upload/v1599997626/background_oeuhe7.jpg");
      /* 决定背景图像的位置是在视口内固定，或者随着包含它的区块滚动。 */
      /* https://developer.mozilla.org/zh-CN/docs/Web/CSS/background-attachment */
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      display: grid;
      height: 100vh;
      place-items: center;
    }
    .form__title {
      font-weight: 300;
      margin: 0;
      margin-bottom: 1.25rem;
    }
    .link {
      color: var(--gray);
      font-size: 0.9rem;
      margin: 1.5rem 0;
      text-decoration: none;
    }
    .container {
      background-color: var(--white);
      border-radius: var(--button-radius);
      box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
        0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
      height: var(--max-height);
      max-width: var(--max-width);
      overflow: hidden;
      position: relative;
      width: 100%;
    }
    .container__form {
      height: 100%;
      position: absolute;
      top: 0;
      transition: all 0.6s ease-in-out;
    }
    .container--signin {
      left: 0;
      width: 50%;
      z-index: 2;
    }
    .container.right-panel-active .container--signin {
      transform: translateX(100%);
    }
    .container--signup {
      left: 0;
      opacity: 0;
      width: 50%;
      z-index: 1;
    }
    .container.right-panel-active .container--signup {
      animation: show 0.6s;
      opacity: 1;
      transform: translateX(100%);
      z-index: 5;
    }
    .container__overlay {
      height: 100%;
      left: 50%;
      overflow: hidden;
      position: absolute;
      top: 0;
      transition: transform 0.6s ease-in-out;
      width: 50%;
      z-index: 100;
    }
    .container.right-panel-active .container__overlay {
      transform: translateX(-100%);
    }
    .overlay {
      background-color: var(--lightblue);
      background: url("https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg");
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      height: 100%;
      left: -100%;
      position: relative;
      transform: translateX(0);
      transition: transform 0.6s ease-in-out;
      width: 200%;
    }
    .container.right-panel-active .overlay {
      transform: translateX(50%);
    }
    .overlay__panel {
      align-items: center;
      display: flex;
      flex-direction: column;
      height: 100%;
      justify-content: center;
      position: absolute;
      text-align: center;
      top: 0;
      transform: translateX(0);
      transition: transform 0.6s ease-in-out;
      width: 50%;
    }
    .overlay--left {
      transform: translateX(-20%);
    }
    .container.right-panel-active .overlay--left {
      transform: translateX(0);
    }
    .overlay--right {
      right: 0;
      transform: translateX(0);
    }
    .container.right-panel-active .overlay--right {
      transform: translateX(20%);
    }
    .btn {
      background-color: var(--blue);
      background-image: linear-gradient(90deg, var(--blue) 0%, var(--lightblue) 74%);
      border-radius: 20px;
      border: 1px solid var(--blue);
      color: var(--white);
      cursor: pointer;
      font-size: 0.8rem;
      font-weight: bold;
      letter-spacing: 0.1rem;
      padding: 0.9rem 4rem;
      text-transform: uppercase;
      transition: transform 80ms ease-in;
    }
    .form>.btn {
      margin-top: 1.5rem;
    }
    .btn:active {
      transform: scale(0.95);
    }
    .btn:focus {
      outline: none;
    }
    .form {
      background-color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      padding: 0 3rem;
      height: 100%;
      text-align: center;
    }
    .input {
      background-color: #fff;
      border: none;
      padding: 0.9rem 0.9rem;
      margin: 0.5rem 0;
      width: 100%;
    }
    @keyframes show {
      0%,
      49.99% {
        opacity: 0;
        z-index: 1;
      }
      50%,
      100% {
        opacity: 1;
        z-index: 5;
      }
    }
  </style>
</head>
<body>
  <div class="container right-panel-active">
    <!-- Sign Up -->
    <div class="container__form container--signup">
      <form action="#" class="form" id="form1">
        <h2 class="form__title">Sign Up</h2>
        <input type="text" placeholder="User" class="input" />
        <input type="email" placeholder="Email" class="input" />
        <input type="password" placeholder="Password" class="input" />
        <button class="btn">Sign Up</button>
      </form>
    </div>
    <!-- Sign In -->
    <div class="container__form container--signin">
      <form action="#" class="form" id="form2">
        <h2 class="form__title">Sign In</h2>
        <input type="email" placeholder="Email" class="input" />
        <input type="password" placeholder="Password" class="input" />
        <a href="#" class="link">Forgot your password?</a>
        <button class="btn">Sign In</button>
      </form>
    </div>
    <!-- Overlay -->
    <div class="container__overlay">
      <div class="overlay">
        <div class="overlay__panel overlay--left">
          <button class="btn" id="signIn">Sign In</button>
        </div>
        <div class="overlay__panel overlay--right">
          <button class="btn" id="signUp">Sign Up</button>
        </div>
      </div>
    </div>
  </div>
  <script>
    const signInBtn = document.getElementById("signIn");
    const signUpBtn = document.getElementById("signUp");
    const fistForm = document.getElementById("form1");
    const secondForm = document.getElementById("form2");
    const container = document.querySelector(".container");
    signInBtn.addEventListener("click", () => {
      container.classList.remove("right-panel-active");
    });
    signUpBtn.addEventListener("click", () => {
      container.classList.add("right-panel-active");
    });
    fistForm.addEventListener("submit", (e) => e.preventDefault());
    secondForm.addEventListener("submit", (e) => e.preventDefault());
  </script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<!-- https://codepen.io/danielkvist/pen/LYNVyPL -->
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    :root {
      /* COLORS */
      --white: #e9e9e9;
      --gray: #333;
      --blue: #0367a6;
      --lightblue: #008997;

      /* RADII */
      --button-radius: 0.7rem;

      /* SIZES */
      --max-width: 758px;
      --max-height: 420px;

      font-size: 16px;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    }

    body {
      align-items: center;
      background-color: var(--white);
      background: url("https://res.cloudinary.com/dbhnlktrv/image/upload/v1599997626/background_oeuhe7.jpg");
      /* 决定背景图像的位置是在视口内固定，或者随着包含它的区块滚动。 */
      /* https://developer.mozilla.org/zh-CN/docs/Web/CSS/background-attachment */
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      display: grid;
      height: 100vh;
      place-items: center;
    }

    .form__title {
      font-weight: 300;
      margin: 0;
      margin-bottom: 1.25rem;
    }

    .link {
      color: var(--gray);
      font-size: 0.9rem;
      margin: 1.5rem 0;
      text-decoration: none;
    }

    .container {
      background-color: var(--white);
      border-radius: var(--button-radius);
      box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
        0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
      height: var(--max-height);
      max-width: var(--max-width);
      overflow: hidden;
      position: relative;
      width: 100%;
    }

    .container__form {
      height: 100%;
      position: absolute;
      top: 0;
      transition: all 0.6s ease-in-out;
    }

    .container--signin {
      left: 0;
      width: 50%;
      z-index: 2;
    }

    .container.right-panel-active .container--signin {
      transform: translateX(100%);
    }

    .container--signup {
      left: 0;
      opacity: 0;
      width: 50%;
      z-index: 1;
    }

    .container.right-panel-active .container--signup {
      animation: show 0.6s;
      opacity: 1;
      transform: translateX(100%);
      z-index: 5;
    }

    .container__overlay {
      height: 100%;
      left: 50%;
      overflow: hidden;
      position: absolute;
      top: 0;
      transition: transform 0.6s ease-in-out;
      width: 50%;
      z-index: 100;
    }

    .container.right-panel-active .container__overlay {
      transform: translateX(-100%);
    }

    .overlay {
      background-color: var(--lightblue);
      background: url("https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg");
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      height: 100%;
      left: -100%;
      position: relative;
      transform: translateX(0);
      transition: transform 0.6s ease-in-out;
      width: 200%;
    }

    .container.right-panel-active .overlay {
      transform: translateX(50%);
    }

    .overlay__panel {
      align-items: center;
      display: flex;
      flex-direction: column;
      height: 100%;
      justify-content: center;
      position: absolute;
      text-align: center;
      top: 0;
      transform: translateX(0);
      transition: transform 0.6s ease-in-out;
      width: 50%;
    }

    .overlay--left {
      transform: translateX(-20%);
    }

    .container.right-panel-active .overlay--left {
      transform: translateX(0);
    }

    .overlay--right {
      right: 0;
      transform: translateX(0);
    }

    .container.right-panel-active .overlay--right {
      transform: translateX(20%);
    }

    .btn {
      background-color: var(--blue);
      background-image: linear-gradient(90deg, var(--blue) 0%, var(--lightblue) 74%);
      border-radius: 20px;
      border: 1px solid var(--blue);
      color: var(--white);
      cursor: pointer;
      font-size: 0.8rem;
      font-weight: bold;
      letter-spacing: 0.1rem;
      padding: 0.9rem 4rem;
      text-transform: uppercase;
      transition: transform 80ms ease-in;
    }

    .form>.btn {
      margin-top: 1.5rem;
    }

    .btn:active {
      transform: scale(0.95);
    }

    .btn:focus {
      outline: none;
    }

    .form {
      background-color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      padding: 0 3rem;
      height: 100%;
      text-align: center;
    }

    .input {
      background-color: #fff;
      border: none;
      padding: 0.9rem 0.9rem;
      margin: 0.5rem 0;
      width: 100%;
    }

    @keyframes show {

      0%,
      49.99% {
        opacity: 0;
        z-index: 1;
      }

      50%,
      100% {
        opacity: 1;
        z-index: 5;
      }
    }
  </style>
</head>

<body>
  <div class="container right-panel-active">
    <!-- Sign Up -->
    <div class="container__form container--signup">
      <form action="#" class="form" id="form1">
        <h2 class="form__title">Sign Up</h2>
        <input type="text" placeholder="User" class="input" />
        <input type="email" placeholder="Email" class="input" />
        <input type="password" placeholder="Password" class="input" />
        <button class="btn">Sign Up</button>
      </form>
    </div>

    <!-- Sign In -->
    <div class="container__form container--signin">
      <form action="#" class="form" id="form2">
        <h2 class="form__title">Sign In</h2>
        <input type="email" placeholder="Email" class="input" />
        <input type="password" placeholder="Password" class="input" />
        <a href="#" class="link">Forgot your password?</a>
        <button class="btn">Sign In</button>
      </form>
    </div>

    <!-- Overlay -->
    <div class="container__overlay">
      <div class="overlay">
        <div class="overlay__panel overlay--left">
          <button class="btn" id="signIn">Sign In</button>
        </div>
        <div class="overlay__panel overlay--right">
          <button class="btn" id="signUp">Sign Up</button>
        </div>
      </div>
    </div>
  </div>

  <script>
    const signInBtn = document.getElementById("signIn");
    const signUpBtn = document.getElementById("signUp");
    const fistForm = document.getElementById("form1");
    const secondForm = document.getElementById("form2");
    const container = document.querySelector(".container");

    signInBtn.addEventListener("click", () => {
      container.classList.remove("right-panel-active");
    });

    signUpBtn.addEventListener("click", () => {
      container.classList.add("right-panel-active");
    });

    fistForm.addEventListener("submit", (e) => e.preventDefault());
    secondForm.addEventListener("submit", (e) => e.preventDefault());

  </script>
</body>

</html>
<!DOCTYPE html>
<html lang="en">
<!-- https://codepen.io/danielkvist/pen/LYNVyPL -->
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    :root {
      /* COLORS */
      --white: #e9e9e9;
      --gray: #333;
      --blue: #0367a6;
      --lightblue: #008997;

      /* RADII */
      --button-radius: 0.7rem;

      /* SIZES */
      --max-width: 758px;
      --max-height: 420px;

      font-size: 16px;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
        Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    }

    body {
      align-items: center;
      background-color: var(--white);
      background: url("https://res.cloudinary.com/dbhnlktrv/image/upload/v1599997626/background_oeuhe7.jpg");
      /* 决定背景图像的位置是在视口内固定，或者随着包含它的区块滚动。 */
      /* https://developer.mozilla.org/zh-CN/docs/Web/CSS/background-attachment */
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      display: grid;
      height: 100vh;
      place-items: center;
    }

    .form__title {
      font-weight: 300;
      margin: 0;
      margin-bottom: 1.25rem;
    }

    .link {
      color: var(--gray);
      font-size: 0.9rem;
      margin: 1.5rem 0;
      text-decoration: none;
    }

    .container {
      background-color: var(--white);
      border-radius: var(--button-radius);
      box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
        0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
      height: var(--max-height);
      max-width: var(--max-width);
      overflow: hidden;
      position: relative;
      width: 100%;
    }

    .container__form {
      height: 100%;
      position: absolute;
      top: 0;
      transition: all 0.6s ease-in-out;
    }

    .container--signin {
      left: 0;
      width: 50%;
      z-index: 2;
    }

    .container.right-panel-active .container--signin {
      transform: translateX(100%);
    }

    .container--signup {
      left: 0;
      opacity: 0;
      width: 50%;
      z-index: 1;
    }

    .container.right-panel-active .container--signup {
      animation: show 0.6s;
      opacity: 1;
      transform: translateX(100%);
      z-index: 5;
    }

    .container__overlay {
      height: 100%;
      left: 50%;
      overflow: hidden;
      position: absolute;
      top: 0;
      transition: transform 0.6s ease-in-out;
      width: 50%;
      z-index: 100;
    }

    .container.right-panel-active .container__overlay {
      transform: translateX(-100%);
    }

    .overlay {
      background-color: var(--lightblue);
      background: url("https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_1280.jpg");
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
      height: 100%;
      left: -100%;
      position: relative;
      transform: translateX(0);
      transition: transform 0.6s ease-in-out;
      width: 200%;
    }

    .container.right-panel-active .overlay {
      transform: translateX(50%);
    }

    .overlay__panel {
      align-items: center;
      display: flex;
      flex-direction: column;
      height: 100%;
      justify-content: center;
      position: absolute;
      text-align: center;
      top: 0;
      transform: translateX(0);
      transition: transform 0.6s ease-in-out;
      width: 50%;
    }

    .overlay--left {
      transform: translateX(-20%);
    }

    .container.right-panel-active .overlay--left {
      transform: translateX(0);
    }

    .overlay--right {
      right: 0;
      transform: translateX(0);
    }

    .container.right-panel-active .overlay--right {
      transform: translateX(20%);
    }

    .btn {
      background-color: var(--blue);
      background-image: linear-gradient(90deg, var(--blue) 0%, var(--lightblue) 74%);
      border-radius: 20px;
      border: 1px solid var(--blue);
      color: var(--white);
      cursor: pointer;
      font-size: 0.8rem;
      font-weight: bold;
      letter-spacing: 0.1rem;
      padding: 0.9rem 4rem;
      text-transform: uppercase;
      transition: transform 80ms ease-in;
    }

    .form>.btn {
      margin-top: 1.5rem;
    }

    .btn:active {
      transform: scale(0.95);
    }

    .btn:focus {
      outline: none;
    }

    .form {
      background-color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      padding: 0 3rem;
      height: 100%;
      text-align: center;
    }

    .input {
      background-color: #fff;
      border: none;
      padding: 0.9rem 0.9rem;
      margin: 0.5rem 0;
      width: 100%;
    }

    @keyframes show {

      0%,
      49.99% {
        opacity: 0;
        z-index: 1;
      }

      50%,
      100% {
        opacity: 1;
        z-index: 5;
      }
    }
  </style>
</head>

<body>
  <div class="container right-panel-active">
    <!-- Sign Up -->
    <div class="container__form container--signup">
      <form action="#" class="form" id="form1">
        <h2 class="form__title">Sign Up</h2>
        <input type="text" placeholder="User" class="input" />
        <input type="email" placeholder="Email" class="input" />
        <input type="password" placeholder="Password" class="input" />
        <button class="btn">Sign Up</button>
      </form>
    </div>

    <!-- Sign In -->
    <div class="container__form container--signin">
      <form action="#" class="form" id="form2">
        <h2 class="form__title">Sign In</h2>
        <input type="email" placeholder="Email" class="input" />
        <input type="password" placeholder="Password" class="input" />
        <a href="#" class="link">Forgot your password?</a>
        <button class="btn">Sign In</button>
      </form>
    </div>

    <!-- Overlay -->
    <div class="container__overlay">
      <div class="overlay">
        <div class="overlay__panel overlay--left">
          <button class="btn" id="signIn">Sign In</button>
        </div>
        <div class="overlay__panel overlay--right">
          <button class="btn" id="signUp">Sign Up</button>
        </div>
      </div>
    </div>
  </div>

  <script>
    const signInBtn = document.getElementById("signIn");
    const signUpBtn = document.getElementById("signUp");
    const fistForm = document.getElementById("form1");
    const secondForm = document.getElementById("form2");
    const container = document.querySelector(".container");

    signInBtn.addEventListener("click", () => {
      container.classList.remove("right-panel-active");
    });

    signUpBtn.addEventListener("click", () => {
      container.classList.add("right-panel-active");
    });

    fistForm.addEventListener("submit", (e) => e.preventDefault());
    secondForm.addEventListener("submit", (e) => e.preventDefault());

  </script>
</body>

</html>
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