前言

本篇文章是用HTML和CSS創建的星空和月亮背景動態特效，適用于小白學習（我也是小白，要是有什么錯誤的地方，歡迎大佬留言指正）

一、主要用到的東西

html做基本的渲染布局，css來填充樣式

二、使用步驟

1.HTML部分代碼

<!doctype html>
<html>
<head>
<meta charset="gb2312">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>純CSS3夜晚天空月亮影片特效 </title>
<link type="text/css" href="css/main.css" rel="stylesheet">
<link type="text/css" href="css/0001245c2.css" rel="stylesheet">
</head>
<body>

<div id="e_background">
	<div id="e_smallstars"></div>
	<div id="e_moon"></div>
</div>
</div>
</body>
</html>

2.填充樣式，布局，

CSS部分代碼如下(0001245c2.css)：

body{
	position:relative
	}
#e_background{
	background:#022436 url(../img/e_stars.png) repeat 20% 20%;
	position:fixed;
	top:0;left:0;right:0;bottom:0;
	z-index:-100;
	-webkit-animation:stars-anim 600s infinite linear;
	-moz-animation:stars-anim 600s infinite linear;
	-o-animation:stars-anim 600s infinite linear;
	animation:stars-anim 600s infinite linear
	}
#e_smallstars{
	background:url(../img/smallstars.png) repeat 20% 20%;
	position:absolute;
	top:0;left:0;right:0;bottom:0;
	opacity:1;z-index:-50;
	-webkit-animation:light 4s infinite alternate;
	-moz-animation:light 4s infinite alternate;
	-o-animation:light 4s infinite alternate;
	animation:light 4s infinite alternate
	}
#e_moon{
	background:url(../img/e_moon2.png) no-repeat 35% 35%;
	position:absolute;top:0;left:0;right:0;bottom:0;
	opacity:1;z-index:-25;
	-webkit-animation:moon-anim 100s infinite linear;
	-moz-animation:moon-anim 100s infinite linear;
	-o-animation:moon-anim 100s infinite linear;
	animation:moon-anim 100s infinite linear
	}
@media only screen and (max-width:480px){
	#e_moon{background:url(../img/e_moon2_sm.png) no-repeat 35% 35%}
	}
@media only screen and (min-width:481px) and (max-width:767px){
	#e_moon{background:url(../img/e_moon2_md.png) no-repeat 35% 35%
	}

@-webkit-keyframes moon-anim{
	from{background-position:0 2%}to{background-position:110% 2%}
	}
@-moz-keyframes moon-anim{
	from{background-position:0 2%}to{background-position:110% 2%}
	}
@-o-keyframes moon-anim{
	from{background-position:0 2%}to{background-position:110% 2%}
	}
@keyframes moon-anim{
	from{background-position:0 2%}to{background-position:110% 2%}
	}
@-webkit-keyframes stars-anim{
	from{background-position:5% 600%}to{background-position:1300% 5%}
}
@-moz-keyframes stars-anim{
	from{background-position:5% 600%}to{background-position:1300% 5%}
	}
@-o-keyframes stars-anim{

    from{background-position:5% 600%}to{background-position:1300% 5%}
	}
@keyframes stars-anim{
	from{background-position:5% 600%}to{background-position:1300% 5%}
}
@-webkit-keyframes light{
	0%{opacity:.1}25%{opacity:.35}50%{opacity:.95}100%{opacity:.2}
}
@-moz-keyframes light{0%{opacity:.1}25%{opacity:.35}50%{opacity:.95}100%{opacity:.2}
}
@-o-keyframes light{
	0%{opacity:.1}25%{opacity:.35}50%{opacity:.95}100%{opacity:.2}
	}
@keyframes light{
	0%{opacity:.1}25%{opacity:.35}50%{opacity:.95}100%{opacity:.2}}

CSS部分代碼如下(main.css)：

@charset "utf-8";
@import url(http://fonts.useso.com/css?family=Play);
html, body, div, section, article, aside, header, hgroup, footer, nav, h1, h2, h3, h4, h5, h6, p, blockquote, address, time, span, em, strong, img, ol, ul, li, figure, canvas, video, th, td, tr {
	margin: 0;
	padding: 0;
	border: 0;
	font: inherit;
}

body {
    width: 60%;
    margin: 5% auto;
    font-family:  'Play', sans-serif;
}

#content {
    
    background-color: rgba(255,255,255,.5);
    width: 70%;
    height: 100%;
    padding: 5%;
    border-radius: 25px;
    margin: 5% auto;
}

#content > p {
    width: 90%;
    padding: 10px 5px;
    margin: 0 auto;
    text-align: center;
}

#content h1 {
    color: #cc0;
    font-size: 1.4em;
    font-weight: bold;
    width: 90%;
    padding: 5px 2.5%;
    margin: 5px auto;
    text-align: center;
}
#content p {
    color: black;
    padding: 5px;
    margin: 5px;
}
/* -------------------- Mobile Style -------------------- */
@media only screen and (max-width:480px) {
body {
    width: 90%;
}
#content {
    width: 90%;
}
}

/* -------------------- Tablet Style -------------------- */
@media only screen and (min-width:481px) and (max-width:767px) {
body {
    width: 80%;
}
#content {
    width: 85%;
}
}


.btn {
  color: #ccf;
  display: inline-block;
  padding: 6px 12px;
  margin-bottom: 0;
  font-size: 20px;
  font-weight: normal;
  line-height: 1.42857143;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  -ms-touch-action: manipulation;
      touch-action: manipulation;
  cursor: pointer;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  background-image: none;
  border: 1px solid transparent;
  border-radius: 4px;
  text-decoration: none;
}
.btn:focus,
.btn:active:focus,
.btn.active:focus,
.btn.focus,
.btn:active.focus,
.btn.active.focus {
  outline: thin dotted;
  outline: 5px auto -webkit-focus-ring-color;
  outline-offset: -2px;
  color: firebrick;
}
.btn:hover,
.btn:focus,
.btn.focus {
  color: #333;
  text-decoration: none;

}
.btn:active,
.btn.active {
  background-image: none;
  outline: 0;
  -webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
          box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
}