关于css3背景图片渐变的规则

1. Webkit引擎的CSS3径向渐变语法
Webkit引擎下的老版本语法：-webkit-gradient([<type>],[<position> || <angle>,]?[<shape> ||<size>,]?<color-stop>,<color-stop>[,<color-stop>]*); //Safari Chrome这两款浏览器支持的版本，浏览器Chrome4-9 和Safari4-5版本支持
Webkit引擎新式语法：-webkit-radial-gradient([<position> || <angle>,]?[<shape> || <size>,]?<color-stop>,<color-stop>[,<color-stop>]*);//Safari Chrome这两款浏览器支持的版本，Chrome10.0+和Safari5.1+支持

2. Gecko引擎的CSS3的径向渐变语法
-moz-radial-gradient([<position> || <angle>,]?[<shape> || <size>,]?<color-stop>,<color-stop>[,<color-stop>]*); //Firefox浏览器支持的版本
Gecko引擎的Firefox浏览器中Firefox3.6+版本支持径向渐变。

3. Presto引擎的CSS3径向渐变语法
-o-radial-gradient([<position> || <angle>,]?[<shape> || <size>,]?<color-stop>,<color-stop>[,<color-stop>]*); //Opera浏览器支持的版本
Presto引擎中的Opear11.6开始支持径向渐变。

4. Trident引擎的CSS3径向渐变语法
-ms-radial-gradient([<position> || <angle>,]?[<shape> || <size>,]?<color-stop>,<color-stop>[,<color-stop>]*); //IE10以上的版本

5. W3C标准径向渐变语法
radial-gradient([[<shape> || <size>] [at <position>]?,| at <position>,]?<color-stop>[,<color-stop>]+); //标准径向渐变

.linear{

width:100%;

height:600px;

FILTER: progid:DXImageTransform.Microsoft.Gradient(gradientType=0,startColorStr=#b8c4cb,endColorStr=red); /*IE 6 7 8*/

background: -ms-linear-gradient(top, #fff, #0000ff); /* IE 10 */

background: -moz-linear-gradient(top,#b8c4cb,#f6f6f8);/*火狐*/

background: -webkit-gradient(linear, 0% 0%, 0% 100%,from(#b8c4cb), to(#f6f6f8));/*谷歌*/

background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#fff), to(#0000ff)); /* Safari 4-5, Chrome 1-9*/

background: -webkit-linear-gradient(top, #fff, #0000ff); /*Safari5.1 Chrome 10+*/

background: -o-linear-gradient(top, #fff, #0000ff); /*Opera 11.10+*/

}

流星效果

safari和ie9以下无效

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>meteor</title>
<style>
*{
padding:0;
margin:0;
}
body{
background-color:#000;
overflow:hidden;
}
.author{
color:#fff;
font:18px/1.5 "微软雅黑";
animation:change 4s infinite;
}
.star{
width:4px;
height:4px;
background-color:#fff;
display:block;
position:absolute;
top:110px;
right:800px;
border-radius:4px;
animation:star 1s infinite linear;
opacity:0;
}
.star:after{
position:relative;
display:block;
top:-49px;
left:23px;
border:2px solid #fff;
border-width:0 0 0 1px;
width:100px;
height:100px;
content:"";
transform:rotate(45deg);
}
.blue{
background-color:lightskyblue;
top:60px;
right:600px;
animation-delay:0.25s;
}
.blue:after{
width:200px;
height:200px;
top:-99px;
left:43px;
border:2px solid lightskyblue;
border-width:0 0 0 1px;
}
.pink{
background-color:lightpink;
top:160px;
right:500px;
animation:starPink 1s infinite linear;
animation-delay:0.5s;
}
.pink:after{
width:133px;
height:133px;
top:-65px;
left:29px;
border:2px solid lightpink;
border-width:0 0 0 1px;
}
.yellow{
background-color:yellow;
top:127px;
right:261px;
animation:starYellow 1s infinite linear;
animation-delay:0.75s;
}
.yellow:after{
width:209px;
height:164px;
top:-65px;
left:29px;
border:2px solid yellow;
border-width:0 0 0 1px;
}
@keyframes change{
0%{
color:#fff;
}
25%{
color:lightskyblue;
}
50%{
color:lightpink;
}
75%{
color:yellow;
}
}
@keyframes star{
0%{
opacity:0;
transform:scale(0) translate(0,0);
}
50%{
opacity:1;
transform:scale(1) translate(-200px,200px);
}
100%{
opacity:0;
transform:scale(1) translate(-400px,400px);
}
}
@keyframes starPink{
0%{
opacity:0;
transform:scale(0) translate(0,0);
}
50%{
opacity:1;
transform:scale(1) translate(-300px,300px);
}
100%{
opacity:0;
transform:scale(1) translate(-600px,600px);
}
}
@keyframes starYellow{
0%{
opacity:0;
transform:scale(0) translate(0,0);
}
50%{
opacity:1;
transform:scale(1) translate(-300px,300px);
}
100%{
opacity:0;
transform:scale(1) translate(-600px,600px);
}
}
</style>
</head>
<body>
by Scott




</body>
</html>

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