animation-duration 动画播放时长

实例代码

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CSS animation-duration 演示</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px;
            background-color: #f5f5f5;
        }
        
        h1 {
            color: #333;
            margin-bottom: 30px;
        }
        
        .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .example {
            background: white;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            width: 300px;
            text-align: center;
        }
        
        .box {
            width: 100px;
            height: 100px;
            background-color: #4CAF50;
            margin: 20px auto;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }
        
        /* 单个动画 */
        .single-animation {
            animation-name: slide;
            animation-duration: 3s;
            animation-iteration-count: infinite;
            animation-direction: alternate;
        }
        
        /* 多个动画 */
        .multiple-animations {
            animation-name: fade, rotate;
            animation-duration: 2s, 4s;
            animation-iteration-count: infinite;
            animation-direction: normal;
        }
        
        /* 关键帧定义 */
        @keyframes slide {
            from { transform: translateX(0); }
            to { transform: translateX(100px); }
        }
        
        @keyframes fade {
            from { opacity: 0.3; }
            to { opacity: 1; }
        }
        
        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        .code {
            background: #f0f0f0;
            padding: 10px;
            border-radius: 4px;
            font-family: monospace;
            text-align: left;
            margin-top: 15px;
            overflow-x: auto;
        }
    </style>
</head>
<body>
    <h1>CSS animation-duration 演示</h1>
    
    <div class="container">
        <div class="example">
            <h2>单个动画</h2>
            <p>水平滑动动画，持续3秒</p>
            <div class="box single-animation">滑动</div>
            <div class="code">
                .box {<br>
                  animation-name: slide;<br>
                  animation-duration: 3s;<br>
                }
            </div>
        </div>
        
        <div class="example">
            <h2>多个动画</h2>
            <p>淡入(2秒) + 旋转(4秒)</p>
            <div class="box multiple-animations">淡入+旋转</div>
            <div class="code">
                .box {<br>
                  animation-name: fade, rotate;<br>
                  animation-duration: 2s, 4s;<br>
                }
            </div>
        </div>
    </div>
    
    <div class="example" style="width: 80%; max-width: 700px;">
        <h2>关键帧定义</h2>
        <div class="code">
            @keyframes slide {<br>
              from { transform: translateX(0); }<br>
              to { transform: translateX(100px); }<br>
            }<br><br>
            
            @keyframes fade {<br>
              from { opacity: 0; }<br>
              to { opacity: 1; }<br>
            }<br><br>
            
            @keyframes rotate {<br>
              from { transform: rotate(0deg); }<br>
              to { transform: rotate(360deg); }<br>
            }
        </div>
    </div>
</body>
</html>