【第23期】仅使用css制作粒子效果的动画背景

2023-04-02

html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>仅css动画背景粒子效果</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <div class="container">
        <div class="particles">
            <span style="--i:11;"></span>
            <span style="--i:12;"></span>
            <span style="--i:21;"></span>
            <span style="--i:10;"></span>
            <span style="--i:25;"></span>
            <span style="--i:18;"></span>
            <span style="--i:13;"></span>
            <span style="--i:26;"></span>
            <span style="--i:14;"></span>
            <span style="--i:27;"></span>
            <span style="--i:15;"></span>
            <span style="--i:22;"></span>
            <span style="--i:17;"></span>
            <span style="--i:16;"></span>
            <span style="--i:28;"></span>
            <span style="--i:19;"></span>
            <span style="--i:20;"></span>
            <span style="--i:23;"></span>
            <span style="--i:24;"></span>
            <span style="--i:29;"></span>
            <span style="--i:11;"></span>
            <span style="--i:12;"></span>
            <span style="--i:21;"></span>
            <span style="--i:10;"></span>
            <span style="--i:25;"></span>
            <span style="--i:18;"></span>
            <span style="--i:13;"></span>
            <span style="--i:26;"></span>
            <span style="--i:14;"></span>
            <span style="--i:27;"></span>
            <span style="--i:15;"></span>
            <span style="--i:22;"></span>
            <span style="--i:17;"></span>
            <span style="--i:16;"></span>
            <span style="--i:28;"></span>
            <span style="--i:19;"></span>
            <span style="--i:20;"></span>
            <span style="--i:23;"></span>
            <span style="--i:24;"></span>
            <span style="--i:29;"></span>
        </div>
    </div>
</body>
</html>

css代码：

*
{
	margin:0;
	padding:0;
	box-sizing: border-box;
}
body
{
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
	background:#09111d;
}
.container
{
	position:relative;
	width:100%;
	height:100vh;
	overflow: hidden;
}
.particles
{
	position:relative;
	display: flex;
	z-index: 1;
	padding:0 20px;
}
.particles span
{
	position:relative;
	bottom:30px;
	width:30px;
	height:30px;
	background:#4fc3dc;
	box-shadow: 0 0 0 10px #4fcedc44,
	0 0 50px #4fc3dc,
	-100px 0 #4fc3dc99,
	100px 0 #ff2d7599;
	margin: 0 4px;
	border-radius: 50%;
	animation:animate 15s ease infinite;
	animation-duration: calc(125s / var(--i));
}
.particles span:nth-child(even)
{
	background:#ff2d75;
	box-shadow: 0 0 0 10px #ff2d7544,
	0 0 50px #ff2d75,
	-100px 0 #4fc3dc99,
	100px 0 #4fc3dc99;
}
@keyframes animate
{
	0%
	{
		transform: translateY(120vh) scale(0) rotate(0deg);
	}
	20%
	{
		transform: translateY(100vh) scale(1) rotate(0deg);
	}
	100%
	{
		transform: translateY(-50vh) scale(0.5) rotate(360deg);
	}
}

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