思路是什么？求高手指点。。。
<!DOCTYPE html>
<html lang="cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no">
<meta name="format-detection" content="telephone=no">
<meta http-equid=“X-UA-Compatible” content=“IE=edge, chrome=1”>
<title>正方体</title>
<style>
html
{
background: -webkit-radial-gradient(center, ellipse, #430d6d 0%, #000000 100%);
background: radial-gradient(ellipse at center, #430d6d 0%, #000000 100%);
height: 100%;
}
#window {
width: 20em;
height: 20em;
position: absolute;
left: 50%;
top:50%;
margin-left: -10em;
margin-top: -10em;
-webkit-perspective: 1000px;
}
#box{
-webkit-animation: 6s spin linear infinite;
position: absolute;
width: 100%;
height: 100%;
-webkit-transform-style: preserve-3d;
transform-style: preserve-3d;
-webkit-transform: rotateX(-20deg) rotateY(-20deg);
}
.face {
background: -webkit-linear-gradient(left, rgba(54, 226, 248, 0.5) 0px, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px), -webkit-linear-gradient(top, rgba(54, 226, 248, 0.5) 0px, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px);
-webkit-background-size: 2.5em 2.5em;
background-color: rgba(0, 0, 0, 0.5);
position: absolute;
width: 100%;
height: 100%;
color: #77ffb9;
box-shadow: inset 0 0 5em rgba(125, 125, 125, 0.8);
}
#face-front {
transform: translateZ(10em);
}
#face-left {
-webkit-transform: rotateY(-90deg) translateZ(10em);
}
#face-top {
-webkit-transform: rotateX(90deg) translateZ(10em);
}
#face-right {
-webkit-transform: rotateY(90deg) translateZ(10em);
}
#face-bottom {
-webkit-transform: rotateX(-90deg) translateZ(10em);
}
#face-back {
-webkit-transform: rotateX(180deg) translateZ(10em);
}
@-webkit-keyframes spin
{
from
{
-webkit-transform: translateZ(-10em) rotateX(0) rotateY(0deg);
transform: translateZ(-10em) rotateX(0) rotateY(0deg);
}
to
{
-webkit-transform: translateZ(-10em) rotateX(360deg) rotateY(360deg);
transform: translateZ(-10em) rotateX(360deg) rotateY(360deg);
}
}
</style>
</head>
<body>
<div id="window">
<div id="box">
<div class="face" id="face-front">1</div>
<div class="face hide" id="face-left">2</div>
<div class="face hide" id="face-top">3</div>
<div class="face hide" id="face-right">4</div>
<div class="face hide" id="face-bottom">5</div>
<div class="face hide" id="face-back">6</div>
</div>
</div>
X:<input id="changex" type="range" name="" min="-100" max="100"
onchange="ratate()"
/>
<br>
Y:<input id="changey" type="range" name="" min="-100" max="100" onmousemove="ratate()"
/>
<script>
function ratate()
{
var x = document.getElementById('changex').value;
var y = document.getElementById('changey').value;
document.getElementById('window').style.webkitPerspectiveOrigin =
x+"% "+y+"%";
}
</script>
</body>
</html>background: -webkit-linear-gradient(left, rgba(54, 226, 248, 0.5) 0px, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px), -webkit-linear-gradient(top, rgba(54, 226, 248, 0.5) 0px, rgba(54, 226, 248, 0.5) 3px, rgba(0, 0, 0, 0) 0px);
-webkit-background-size: 2.5em 2.5em;
这种设置背景颜色的方式没有见过，是什么意思呀？
效果非常好，求私聊（请教大神53596192）