【HTML+CSS】简单实现一个登录界面（CSS动态渐变背景）

2021 年 11 月 11 日

1777 次浏览

2377字数

发现了一款漂亮的HTML页面
开源项目：https://gitee.com/xiaochuang-bucai/html-case/tree/jddl01
Html

* {
    margin: 0;
    padding: 0;
}
.content {
    position: relative;
    width: 100vw;
    height: 100vh;
    background-color: antiquewhite;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.content::before {
    position: absolute;
    content: "";
    display: block;
    width: 300%;
    height: 100%;
    background-image: linear-gradient(to bottom right,
    rgb(25, 0, 255), rgb(111, 0, 255), rgb(242, 0, 250));
    filter: blur(4px);
    animation: bg-anim 10s alternate infinite linear;
}
@keyframes bg-anim {
    from {
        left: 0;
    }
    to {
        left: -200%;
    }
}
.login-box {
    position: relative;
    width: 400px;
    height: 400px;
    background-color: rgba(74, 0, 170, 0.3);
    border-radius: 30px;
    color: #fff;

    display: flex;
    flex-direction: column;
    align-items: center;
}
.login-box>h1 {
    margin: 50px 0 10px 0;
    font-size: 64px;
}
.output-frame {
    margin-top: 20px;
    width: 300px;
    height: 40px;
    display: flex;
}
.output-frame>label {
    font-size: 16px;
    width: 64px;
    background-color: rgba(212, 0, 219, 0.6);
    border-radius: 40px 10px 10px 40px;
    text-indent: 20px;

    display: flex;
    align-items: center;
}
.output-frame>input {
    flex: 1;
    width: 0;
    margin-left: 6px;
    padding: 0 20px 0 10px;
    border-radius: 10px 40px 40px 10px;
    outline: none;
    border: none;
    font-size: 20px;
    background-color: rgba(74, 0, 170, 0.3);
    color: #fff;
}

.output-frame>input:focus {
    color: #000;
    background-color: #fff;
}
.login-btn {
    margin-top: 40px;
    width: 200px;
    height: 40px;
    font-size: 20px;
    border: none;
    background-color: rgba(212, 0, 219, 0.6);
    color: #fff;
    border-radius: 40px;
}
.login-btn:hover {
    background-color: rgba(212, 0, 219, 0.8);
}

<!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>Document</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <div class="content">
        <div class="login-box">
            <h1>SIGN IN</h1>
            <div class="output-frame">
                <label for="username">账号</label>
                <input type="text" id="username" autofocus>
            </div>
            <div class="output-frame">
                <label for="password">密码</label>
                <input type="password" id="password">
            </div>
            <button class="login-btn">登录</button>
        </div>
    </div>
</body>
</html>