新增第90个小实例：超时空背景的登录界面
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86. HTML5+CSS3+JS小实例：滚动渐变导航栏
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87. HTML5+CSS3+JS小实例：逼真的玻璃卡片悬停效果
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88. HTML5+CSS3小实例：广告灯牌效果的loading动画
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89. HTML5+CSS3小实例：自带射灯的浮雕按钮
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89. HTML5+CSS3小实例：自带射灯的浮雕按钮
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90. HTML5+CSS3小实例：超时空背景的登录界面
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*{
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/* 初始化 */
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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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/* 100%窗口高度 */
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height: 100vh;
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/* 弹性布局 水平+垂直居中 */
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display: flex;
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justify-content: center;
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align-items: center;
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background-color: #000;
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/* 溢出隐藏 */
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overflow: hidden;
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}
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.container{
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/* 设置视距 */
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perspective: 5px;
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/* 设置3D元素的基点位置 */
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perspective-origin: 50% 50%;
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}
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.wrap{
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/* 绝对定位 */
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position: absolute;
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width: 1000px;
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height: 1000px;
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left: -500px;
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top: -500px;
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/* 开启3D效果 */
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transform-style: preserve-3d;
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/* 执行动画：动画名 时长 线性的 无限次播放 */
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animation: move 20s linear infinite;
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}
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.wall{
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position: absolute;
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width: 100%;
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height: 100%;
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background: url("../images/space1.jpg") no-repeat;
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/* 保持原有尺寸比例，裁切长边 */
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background-size: cover;
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}
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/* 为各个方位的“墙壁”设置旋转角度、Z轴位移 */
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.wall-top{
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transform: rotateX(90deg) translateZ(500px);
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}
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.wall-bottom{
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transform: rotateX(-90deg) translateZ(500px);
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}
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.wall-left{
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transform: rotateY(-90deg) translateZ(500px);
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}
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.wall-right{
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transform: rotateY(90deg) translateZ(500px);
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}
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.wall-back{
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transform: rotateX(180deg) translateZ(500px);
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}
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.form-box{
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/* 相对定位 */
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position: relative;
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background-color: rgba(255,255,255,0.1);
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width: 400px;
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height: 550px;
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border-radius: 15px;
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border-top: 1px solid rgba(255,255,255,0.5);
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border-left: 1px solid rgba(255,255,255,0.5);
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display: flex;
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align-items: center;
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flex-direction: column;
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/* 背景模糊 */
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backdrop-filter: blur(20px);
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/* 阴影 */
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box-shadow: 0 20px 50px rgba(0,0,0,0.5);
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}
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.form-box .tit{
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color: #fff;
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font-size: 40px;
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font-weight: bold;
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/* 大写 */
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text-transform: uppercase;
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/* 字间距 */
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letter-spacing: 10px;
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text-indent: 10px;
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margin: 95px auto 50px auto;
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}
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.form-box input{
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width: 300px;
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height: 30px;
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background: transparent;
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text-indent: 8px;
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border: none;
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outline: none;
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border-bottom: 1px solid rgba(255,255,255,0.8);
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color: #fff;
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margin: 15px auto;
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}
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.form-box input::placeholder{
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color: rgba(255,255,255,0.8);
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}
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.form-box button{
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width: 300px;
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height: 40px;
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margin: 35px auto 40px auto;
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border: none;
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background: #00addd;
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color: #fff;
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border-radius: 8px;
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letter-spacing: 20px;
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text-indent: 20px;
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font-weight: bold;
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cursor: pointer;
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}
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.form-box button:hover{
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background: #0098d4;
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}
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.form-box span{
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font-size: 14px;
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color: #fff;
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}
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.form-box a{
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color: #00addd;
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text-decoration: none;
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}
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/* 定义动画 */
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@keyframes move{
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0%{
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transform: rotate(0deg) translateZ(-500px);
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}
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100%{
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transform: rotate(90deg) translateZ(500px);
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}
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}
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@ -0,0 +1,31 @@
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
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<title>超时空背景的登录界面</title>
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<link rel="stylesheet" href="../css/90.css">
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</head>
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<body>
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<div class="container">
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<div class="wrap">
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<div class="wall wall-top"></div>
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<div class="wall wall-bottom"></div>
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<div class="wall wall-left"></div>
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<div class="wall wall-right"></div>
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<div class="wall wall-back"></div>
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</div>
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<div class="form-box">
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<div class="tit">login</div>
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<input type="text" placeholder="账号">
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<input type="password" placeholder="密码">
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<button>登录</button>
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<span>没有账号？<a href="#">去注册</a></span>
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</div>
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</div>
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</body>
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</html>
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