新增第245个小实例：简约灵动的深色登录界面
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DESKTOP-BM6RJU5\wyanh
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242. HTML5+CSS3小实例：点画文字悬停效果
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243. HTML5+CSS3+JS小实例：网格图库
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244. HTML5+CSS3小实例：粘性文字的滚动效果
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245. HTML5+CSS3小实例：简约灵动的深色登录界面
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#### 赞赏作者
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*{
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margin: 0;
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padding: 0;
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}
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body{
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min-height: 100vh;
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background: linear-gradient(#141e30,#243b55);
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}
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.login-box{
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width: 400px;
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position: absolute;
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left: 50%;
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top: 50%;
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transform: translate(-50%,-50%);
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padding: 40px;
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background: rgba(0,0,0,0.5);
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box-sizing: border-box;
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box-shadow: 0 15px 25px rgba(0, 0, 0, 0.6);
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border-radius: 10px;
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}
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.login-box h2{
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margin: 0 0 40px;
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padding: 0;
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color: #fff;
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text-align: center;
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}
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.login-box .user-box{
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position: relative;
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}
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.login-box .user-box input{
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width: 100%;
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padding: 10px 0;
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font-size: 16px;
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color: #fff;
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margin-bottom: 30px;
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border: none;
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border-bottom: 1px solid #fff;
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background: transparent;
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outline: none;
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}
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.login-box .user-box label{
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position: absolute;
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top: 0;
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left: 0;
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padding: 10px 0;
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color: #fff;
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font-size: 16px;
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pointer-events: none;
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transition: 0.5s;
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}
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.login-box .user-box input:focus ~ label,
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.login-box .user-box input:valid ~ label{
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top: -20px;
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left: 0;
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color: #03e9f4;
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font-size: 12px;
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}
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.login-box form a{
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position: relative;
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display: inline-block;
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padding: 10px 40px;
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color: #03e9f4;
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text-decoration: none;
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font-size: 16px;
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margin-top: 40px;
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letter-spacing: 4px;
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text-indent: 4px;
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transition: 0.5s;
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overflow: hidden;
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}
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.login-box form a:hover{
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background: #03e9f4;
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color: #fff;
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border-radius: 5px;
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box-shadow: 0 0 5px #03e9f4, 0 0 25px #03e9f4, 0 0 50px #03e9f4, 0 0 100px #03e9f4;
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}
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.login-box form a span{
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position: absolute;
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display: block;
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}
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.login-box form a span:nth-child(1){
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top: 0;
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left: -100%;
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width: 100%;
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height: 2px;
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background: linear-gradient(90deg,transparent,#03e9f4);
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animation: btn-anim1 1s linear infinite;
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}
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@keyframes btn-anim1 {
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0%{
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left: -100%;
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}
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50%,100%{
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left: 100%;
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}
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}
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.login-box form a span:nth-child(2){
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top: -100%;
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right: 0;
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width: 2px;
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height: 100%;
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background: linear-gradient(180deg,transparent,#03e9f4);
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/* 执行动画：动画名 时长 线性的 循环的 */
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animation: btn-anim2 1s linear infinite;
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/* 动画延迟时间 */
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animation-delay: 0.25s;
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}
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@keyframes btn-anim2 {
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0%{
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top: -100%;
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}
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50%,100%{
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top: 100%;
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}
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}
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.login-box form a span:nth-child(3){
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bottom: 0;
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right: -100%;
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width: 100%;
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height: 2px;
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background: linear-gradient(270deg,transparent,#03e9f4);
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animation: btn-anim3 1s linear infinite;
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animation-delay: 0.5s;
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}
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@keyframes btn-anim3 {
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0%{
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right: -100%;
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}
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50%,100%{
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right: 100%;
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}
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}
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.login-box form a span:nth-child(4){
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bottom: -100%;
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left: 0;
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width: 2px;
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height: 100%;
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background: linear-gradient(360deg,transparent,#03e9f4);
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animation: btn-anim4 1s linear infinite;
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animation-delay: 0.75s;
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}
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@keyframes btn-anim4 {
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0%{
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bottom: -100%;
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}
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50%,100%{
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bottom: 100%;
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}
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}
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@ -0,0 +1,28 @@
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>简约灵动的深色登录界面</title>
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<link rel="stylesheet" href="245.css">
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</head>
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<body>
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<div class="login-box">
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<h2>用户登录</h2>
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<form>
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<div class="user-box">
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<input type="text" required>
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<label>账号</label>
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</div>
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<div class="user-box">
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<input type="password" required>
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<label>密码</label>
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</div>
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<a href="#">
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<span></span><span></span><span></span><span></span>
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登录
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</a>
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</form>
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</div>
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</body>
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</html>
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