<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>CSS3 水墨风格背景动画按钮DEMO演示</title>
<style>
:root {
--height: 100px;
--width: 200px;
}
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
width: 100%;
height: 100vh;
background-image: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
font-family: sans-serif;
}
.wrapper {
width: calc(4 * var(--width));
height: calc(4 * var(--height));
display: flex;
justify-content: center;
align-items: center;
}
.button {
position: relative;
width: calc(0.8 * var(--width));
height: calc(0.7 * var(--height));
display: flex;
justify-content: center;
align-items: center;
cursor: pointer;
overflow: hidden;
margin: 0 0.8rem;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2), 0 3px 8px rgba(0, 0, 0, 0.1);
transition: all 0.3s cubic-bezier(0, 0.22, 0.3, 1);
}
.button:before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: rgba(0, 0, 0, 0.1);
}
.button span {
color: #fff;
font-size: 1rem;
z-index: 10;
text-transform: uppercase;
letter-spacing: 2px;
}
.button._1 {
background: #36cac3;
}
.button._2 {
background: #7e44ad;
}
.button._3 {
background: #e74c3c;
}
.button._4 {
background: #dadd37;
}
.button .back {
position: absolute;
width: 0;
height: 0;
filter: url(#filter);
border-radius: 50%;
z-index: 5;
transition: all 2.5s cubic-bezier(0.1, 0.22, 0.3, 1);
}
.button._1 .back {
left: -50%;
top: -50%;
background: #27ae60;
}
.button._2 .back {
right: -50%;
top: -50%;
background: #c0392b;
}
.button._3 .back {
left: -50%;
bottom: -50%;
background: #34495e;
}
.button._4 .back {
right: -50%;
bottom: -50%;
background: #2980b9;
}
.button:hover .back {
width: calc(2 * var(--width));
height: calc(2 * var(--height));
}
@media only screen and (max-width: 750px) {
.wrapper {
flex-direction: column;
}
.button {
margin: 0.8rem 0;
}
}
</style>
</head>
<body>
<svg width="0" height="0">
<filter id="filter">
<feTurbulence type="fractalNoise" baseFrequency=".01" numOctaves="6" />
<feDisplacementMap in="SourceGraphic" scale="100" />
</filter>
</svg>
<div class="wrapper">
<div class="button _1"> <span>hover</span>
<div class="back"></div>
</div>
<div class="button _2"> <span>hover</span>
<div class="back"></div>
</div>
<div class="button _3"> <span>hover</span>
<div class="back"></div>
</div>
<div class="button _4"> <span>hover</span>
<div class="back"></div>
</div>
</div>
<div style="text-align:center;clear:both;">
</div>
</body>
</html>