<!DOCTYPEhtml>
<htmllang="en">
<head>
<metacharset="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(toright,#4facfe0%,#00f2fe100%);
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:00.8rem;
box-shadow:02px5pxrgba(0,0,0,0.2),03px8pxrgba(0,0,0,0.1);
transition:all0.3scubic-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);
}
.buttonspan{
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:all2.5scubic-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));
}
@mediaonlyscreenand(max-width:750px){
.wrapper{
flex-direction:column;
}
.button{
margin:0.8rem0;
}
}
</style>
</head>
<body>
<svgwidth="0"height="0">
<filterid="filter">
<feTurbulencetype="fractalNoise"baseFrequency=".01"numOctaves="6"/>
<feDisplacementMapin="SourceGraphic"scale="100"/>
</filter>
</svg>
<divclass="wrapper">
<divclass="button_1"><span>hover</span>
<divclass="back"></div>
</div>
<divclass="button_2"><span>hover</span>
<divclass="back"></div>
</div>
<divclass="button_3"><span>hover</span>
<divclass="back"></div>
</div>
<divclass="button_4"><span>hover</span>
<divclass="back"></div>
</div>
</div>
<divstyle="text-align:center;clear:both;">
</div>
</body>
</html>
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