过渡动画：
在哪产生动画、动画的时间、运动曲线、延迟
transition: border-radius 500ms ease,width 500ms ease 500ms,height 500ms ease 1s,background-color 500ms ease 1.5s;
圆角_阴影_透明：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css3圆角 阴影 透明度</title>
<style type="text/css">
.box{
width: 200px;
height: 200px;
border: 2px solid #000;
background-color: gold;
margin: 50px auto 0;
/*border-top-left-radius: 100px 50px;左上角为椭圆圆角*/
/*border-top-left-radius: 100px;
border-top-right-radius: 100px;左、右上角为正圆圆角*/
/*border-radius: 40px;曲率半径为40的圆角矩形*/
/*border-radius: 20%;最大200px，20%即40px*/
border-radius: 50%;/*正圆*/
}
.box1{
width: 200px;
height: 40px;
background-color: gold;
margin: 100px auto 0;
/*水平偏移 垂直偏移 羽化大小 扩展大小 颜色*/
box-shadow: 10px 10px 10px 0px #bfa;
}
.box2{
width: 200px;
height: 40px;
background-color: gold;
margin: 100px auto 0;
/*水平偏移 垂直偏移 羽化大小 扩展大小 颜色 是否内阴影*/
box-shadow: 0px 0px 20px 2px red inset;
}
body{
background-color: cyan;
}
.box3{
width: 200px;
height: 200px;
/*background: url(images/location_bg.jpg);*/
background-color: gold;
margin: 50px auto 0;
border: 2px solid #000;
border-radius: 50%;
/*透明度30%，文字也透明了*/
opacity: 0.3;
filter: alpha(opacity=30);/*兼容IE*/
text-align: center;
line-height: 200px;
}
.box4{
width: 200px;
height: 200px;
/*背景色变透明，但文字不会透明*/
background-color: rgba(255,215,0,0.3);
margin: 50px auto 0;
/*边框透明*/
border: 2px solid rgba(0,0,0,0.3);
border-radius: 50%;
text-align: center;
line-height: 200px;
}
.d1{
border: 1px solid red;
border-radius: 100px;
width: 150px;
padding: 1px 0 1px 30px;
}
input{
border: none;
width: 100px;
height: 30px;
}
input:focus{
outline:none;
}
</style>
</head>
<body>
<div class="box"></div>
<div class="box1"></div>
<div class="box2"></div>
<div class="box3">床前明月光</div>
<div class="box4">床前明月光</div>
<div class="d1">
<input type="text">
</div>
</body>
</html>
匀速
transition: all 1s linear;
开始和结束慢速，中间加速
transition: all 1s ease;
开始慢速，结尾突然停止
transition: all 1s ease-in;
突然开始，结束时慢速
transition: all 1s ease-out;
开始和结束时慢速
transition: all 1s ease-in-out;
贝塞尔（贝兹）曲线
transition: all 1s cubic-bezier(0.250,0.250,0.750,0.750);匀速
超出再缩回的弹性效果
transition: all 1s cubic-bezier(0.470, -0.485, 0.460, 1.435);
