html从零开始8：css3新特性、动画、媒体查询、雪碧图、字体图标【搬代码】
css3新特性
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>div{width: 200px;height: 200px;background-color: aqua;position: relative;border-radius: 20px;/*圆角属性，100%就变成圆形了*/left: 50px;top: 100px;}</style>
</head>
<body><div></div>
</body>
</html>
两个值
border-radius: 50px 5px;
阴影
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>div{width: 200px;height: 200px;background-color: aqua;position: relative;border-radius: 50px 5px;/*圆角属性*/left: 50px;top: 100px;}.box1{width: 200px;height: 200px;background-color: blueviolet;margin: 0 auto;/*将div放到中间，左右空袭平均分配*/box-shadow: 10px 10px 20px rgba(0, 0, 0, 0.5);/*px也可以变成负数，那就是对角方向变成阴影*/}</style>
</head>
<body><div></div><div class="box1"></div>
</body>
</html>
动画
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>div{width: 200px;height: 200px;background-color: brown;animation: myAnmin 3s linear 0s infinite ;/* animation: name duration timing-function delay iteration-count direction fill-mode;*/}/*鼠标滑倒该元素上就触发*/div:hover{/* background-color: blanchedalmond; */animation-play-state: paused;}@keyframes myAnmin {0%{width: 100px;height: 200px;background-color: antiquewhite;}25%{width: 300px;height: 200px;background-color: aqua;}50%{width: 600px;height: 200px;background-color: bisque;}75%{width: 1000px;height: 200px;background-color: black;}100%{background-color: blue;}75%{width: 1000px;height: 200px;background-color: black;}50%{width: 600px;height: 200px;background-color: bisque;}25%{width: 300px;height: 200px;background-color: aqua;}}</style>
</head>
<body><div></div>
</body>
</html>
呼吸效果
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.box{width: 500px;height: 400px;margin: 40px auto;background-color: cadetblue;border-radius: 5px;box-shadow: 0 1px 2px;animation: breathe 2.7s ease-in-out infinite alternate;}@keyframes breathe {0%{opacity: 0.2;box-shadow: 0 1px 2px rgba(255, 255, 255, 0.1);}50%{opacity: 0.5;box-shadow: 0 1px 2px rgba(18, 190, 84, 0.76);}100%{opacity: 1;box-shadow: 0 1px 30px rgba(59, 255, 255, 1);}}</style>
</head>
<body><div class="box"></div>
</body>
</html>
媒体查询
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.box1{width: 300px;height: 300px;}@media screen and (max-width: 768px) {/*max-width: 768px屏幕宽度768手机*/.box1{background-color: aqua;}.p1{display: none;}.p2{display: none;}}@media screen and (min-width: 768px) and (max-width: 996px) {/*max-width: 768px屏幕宽度996平板*/.box1{background-color: blue;}.p1{display: none;}.p2{display: block;/*block显示，none不显示*/}}@media screen and (min-width:996px) {/*max-width: 768px屏幕宽度996电脑*/.box1{background-color: brown;}.p1{display: block;}.p2{display: block;/*block显示，none不显示*/}}</style>
</head>
<body><div class="box1"></div><p class="p1">嘎嘎嘎</p><p class="p2">哈哈哈</p>
</body>
</html>
图1
2
3
雪碧图
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.icon{display: block;/*block把一个行内元素变化成一个块级元素；inline变成一个行内元素*/width: 70px;height: 70px;background-image: url(4.jpg);border: 1px solid red;background-position: -26px -30px;/*参数是xy轴*/}.icon2{display: block;/*block把一个行内元素变化成一个块级元素；inline变成一个行内元素*/width: 70px;height: 70px;background-image: url(4.jpg);border: 1px solid red;background-position: -26px -140px;/*参数是xy轴*/}</style>
</head>
<body><span class="icon"></span><span class="icon2"></span>
</body>
</html>
字体图标
下载可以使用的图标代码，iconfont.cn
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><link rel="stylesheet" href="./font/iconfont.css"><title></title><style>.icon{display: block;/*block把一个行内元素变化成一个块级元素；inline变成一个行内元素*/width: 70px;height: 70px;background-image: url(4.jpg);border: 1px solid red;background-position: -26px -30px;/*参数是xy轴*/}.icon2{display: block;/*block把一个行内元素变化成一个块级元素；inline变成一个行内元素*/width: 70px;height: 70px;background-image: url(4.jpg);border: 1px solid red;background-position: -26px -140px;/*参数是xy轴*/}.xing{font-size: 40px;color: brown;/*color可以设置图标颜色*/}</style>
</head>
<body><span class="icon"></span><span class="icon2"></span><span class="iconfont icon-xing xing"></span>
</body>
</html>
