CSS小特效：文字闪烁——【钢铁侠：爱你三千遍】

效果图

HTML篇

<div class="main">
        <div>
            <span>I</span></div>
        <div>
            <span>l</span>
            <span>o</span>
            <span>v</span>
            <span>e</span></div>
        <div>
            <span>y</span>
            <span>o</span>
            <span>u</span></div>
        <div>
            <span>3</span>
            <span>0</span>
            <span>0</span>
            <span>0</span></div>
</div>

这里将每个字母分别用盒子包住是为了后面设置动画延迟，保证文字闪烁呈现流水型
还记得span是行内元素吧，它们可以在同一行排列，不过div不能，所以我们还需要用display转换div的元素显示模式为inline-block
这里可能小伙伴会有疑问为什么还要用div将每个单词保住，这里是因为后面用flex布局，让单词之间自动设置间隙，整体更加好看

CSS篇

盒子模型设置
```
     body{
         background-color: black;
     }
     .main{
         padding-top: 249px;
         margin: 0 auto;
         width: 1200px;
         display: flex;
         justify-content: space-around;
         font-family: 'Courier New', Courier, monospace;
     }
     .main div{
         display: inline-block;
         color: transparent;
     }
     span{
         font-size: 120px;
         animation: twinkle 4.6s linear infinite;
     }
```
- 这里用到flex布局的justify-content属性，display为flex的父元素的子元素称为项目，而space-around属性值，则使项目之间根据父元素宽度平均分布间隔，（两端与项目之间也会分配间隔，为项目与项目之间间隔的一半，这个在案例中不重要）
- 这里对span标签选择，设置动画，animation属性可以连写：
  1. 第一个值twinkle为动画名字
  2. 第二个为duration,动画播放时长
  3. 第三个值为timing-function,时间过渡曲线，linear为线性过渡，动画播放无倍数变换
  4. 第四个值为播放次数，infinity为无限循环
  5. 将文字颜色设置为透明，当然也可以用opacity

动画设置

 .main div:nth-child(1) span:nth-child(1){
         animation-delay: 0s;
     }
     .main div:nth-child(2) span:nth-child(1){
         animation-delay: 0.4s;
     }
     .main div:nth-child(2) span:nth-child(2){
         animation-delay: 0.8s;
     }
     .main div:nth-child(2) span:nth-child(3){
         animation-delay: 1.2s;
     }
     .main div:nth-child(2) span:nth-child(4){
         animation-delay: 1.6s;
     }
     .main div:nth-child(3) span:nth-child(1){
         animation-delay: 2.0s;
     }
     .main div:nth-child(3) span:nth-child(2){
         animation-delay: 2.4s;
     }
     .main div:nth-child(3) span:nth-child(3){
         animation-delay: 2.8s;
     }
     .main div:nth-child(4) span:nth-child(1){
         animation-delay: 3.2s;
     }
     .main div:nth-child(4) span:nth-child(2){
         animation-delay: 3.6s;
     }
     .main div:nth-child(4) span:nth-child(3){
         animation-delay: 4s;
     }
     .main div:nth-child(4) span:nth-child(4){
         animation-delay: 4.4s;
     }
     @keyframes twinkle{
         0%{
             color: transparent;
         } 
         100%{
             color: aliceblue;
             text-shadow: 0 0 4px skyblue,
                             0 0 10px skyblue,
                             0 0 20px skyblue,
                             0 0 30px skyblue,
                             0 0 40px skyblue,
                             0 0 50px skyblue,
                             0 0 60px skyblue,
                             0 0 70px skyblue,
                             0 0 80px skyblue,
                             0 0 90px skyblue,
                             0 0 100px skyblue,
                             0 0 110px skyblue,
                             0 0 120px skyblue,
                             0 0 130px skyblue;
             /* 文字阴影叠加 */
         }
     }

给每个span盒子设置各自的动画延迟时间，实现流水型效果
这里需要注意复合选择器写法和nth-child方法的选择方式
创建动画播放，上面用文字阴影叠加效果，实现文字闪烁，其实一些好看的文字特效，阴影部分都是用叠加的效果做的，大家还可以试一下用多个颜色叠加，做出个五彩斑斓的黑如何？

完整代码

<!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>文字闪烁效果</title>
    <style>
        body{
            background-color: black;
        }
        .main{
            padding-top: 249px;
            margin: 0 auto;
            width: 1200px;
            display: flex;
            justify-content: space-around;
            font-family: 'Courier New', Courier, monospace;
        }
        .main div{
            display: inline-block;
            color: transparent;
        }
        span{
            font-size: 120px;
            animation: twinkle 4.6s linear infinite;
            
        }
        .main div:nth-child(1) span:nth-child(1){
            animation-delay: 0s;
        }
        .main div:nth-child(2) span:nth-child(1){
            animation-delay: 0.4s;
        }
        .main div:nth-child(2) span:nth-child(2){
            animation-delay: 0.8s;
        }
        .main div:nth-child(2) span:nth-child(3){
            animation-delay: 1.2s;
        }
        .main div:nth-child(2) span:nth-child(4){
            animation-delay: 1.6s;
        }
        .main div:nth-child(3) span:nth-child(1){
            animation-delay: 2.0s;
        }
        .main div:nth-child(3) span:nth-child(2){
            animation-delay: 2.4s;
        }
        .main div:nth-child(3) span:nth-child(3){
            animation-delay: 2.8s;
        }
        .main div:nth-child(4) span:nth-child(1){
            animation-delay: 3.2s;
        }
        .main div:nth-child(4) span:nth-child(2){
            animation-delay: 3.6s;
        }
        .main div:nth-child(4) span:nth-child(3){
            animation-delay: 4s;
        }
        .main div:nth-child(4) span:nth-child(4){
            animation-delay: 4.4s;
        }
        @keyframes twinkle{
            0%{
                color: transparent;
            } 
            100%{
                color: aliceblue;
                text-shadow: 0 0 4px skyblue,
                                0 0 10px skyblue,
                                0 0 20px skyblue,
                                0 0 30px skyblue,
                                0 0 40px skyblue,
                                0 0 50px skyblue,
                                0 0 60px skyblue,
                                0 0 70px skyblue,
                                0 0 80px skyblue,
                                0 0 90px skyblue,
                                0 0 100px skyblue,
                                0 0 110px skyblue,
                                0 0 120px skyblue,
                                0 0 130px skyblue;
                /* 文字阴影叠加 */
                /* text-shadow: 0 0 4px red,
                                0 0 10px orange,
                                0 0 20px yellow,
                                0 0 30px green,
                                0 0 40px blue,
                                0 0 50px skyblue,
                                0 0 60px blueviolet; */
            }
        }
    </style>
</head>
<body>
    <div class="main">
        <div>
            <span>I</span></div>
        <div>
            <span>l</span>
            <span>o</span>
            <span>v</span>
            <span>e</span></div>
        <div>
            <span>y</span>
            <span>o</span>
            <span>u</span></div>
        <div>
            <span>3</span>
            <span>0</span>
            <span>0</span>
            <span>0</span></div>
    </div>
</body>
</html>

文章来源：https://blog.csdn.net/weixin_62542181/article/details/125173689

#HTML&CSS

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