一、CSS3边框
1、圆角border-radius
border-radius:值越大，角越圆；
div{ width:100px; height:100px; background-color:red; border-radius:10px; border-top-left-radius:20px;} - border-top-left-radius:2em;
- border-top-right-radius:2em;
- border-bottom-right-radius:2em;
- border-bottom-left-radius:2em;
也可以根据上面4个参数，单独设置某个角。
2、阴影box-shadow
div{ width:100px; height:100px; background-color:yellow; box-shadow: 10px 10px 5px #d8d8d8;} box-shadow: h-shadow v-shadow blur spread color inset;
h-shadow:水平向右偏移量；
v-shadow:垂直向下偏移量；
blur:模糊距离；
spread:阴影尺寸；
color:阴影颜色；
inset:改为内阴影；
3、边框图片 border-image
- border-image-source 用在边框的图片的路径。
- border-image-slice 图片边框向内偏移。
- border-image-width 图片边框的宽度。
- border-image-outset 边框图像区域超出边框的量。
- border-image-repeat 图像边框是否应平铺(repeated)、铺满(rounded)或拉伸(stretched)。
二、CSS3 背景
1、background-size:控制背景图片的大小；
background-size:20px 20px;
2、background-origin:3个属性可选；
- padding-box 背景图像相对于内边距框来定位。
- border-box 背景图像相对于边框盒来定位。
- content-box 背景图像相对于内容框来定位。
3、background-clip：规定背景的绘制区域。
- padding-box 背景图像相对于内边距框来定位。
- border-box 背景图像相对于边框盒来定位。
- content-box 背景图像相对于内容框来定位。
另外在CSS3中，background-image:可以设置多张图片了。
background-image:url(1.gif),url(2.gif);
三、过渡transition
- transition:简写属性，用于在一个属性中设置四个过渡属性。
- transition-property:规定应用过渡的 CSS 属性的名称。
- transition-duration:定义过渡效果花费的时间。默认是 0。
- transition-timing-function:规定过渡效果的时间曲线。默认是 "ease"。
- transition-delay:规定过渡效果何时开始。默认是 0。
其中transition-timing-function过渡时间，有以下几种，你可以规定它过渡的速度。
- linear 规定以相同速度开始至结束的过渡效果（等于 cubic-bezier(0,0,1,1)）。
- ease 规定慢速开始，然后变快，然后慢速结束的过渡效果（cubic-bezier(0.25,0.1,0.25,1)）。
- ease-in 规定以慢速开始的过渡效果（等于 cubic-bezier(0.42,0,1,1)）。
- ease-out 规定以慢速结束的过渡效果（等于 cubic-bezier(0,0,0.58,1)）。
- ease-in-out 规定以慢速开始和结束的过渡效果（等于 cubic-bezier(0.42,0,0.58,1)）。
- cubic-bezier(n,n,n,n) 在 cubic-bezier 函数中定义自己的值。可能的值是 0 至 1 之间的数值。
<!DOCTYPE html><html><head><style> div{ width:200px; height:200px; background-color:#d8d8d8;}div:hover{ width:300px; transition: width 2s;}</style></head><body> <div></div></body></html> 鼠标移上3D转换360度。
div:hover{ transform: rotateY(360deg); transition: transform 2s;} 四、CSS动画
<!DOCTYPE html><html><head><style> div{ width:100px; height:100px; background-color:#d5d5d5; color:white; animation:myfirst 5s;}@keyframes myfirst{ from {margin-left:20px;} to {margin-left:520px;transform: rotateY(360deg);}}</style></head><body><div> 飞啊飞</div></body></html> 以上是改变位置，并且一边移动一边旋转的动画。
<!DOCTYPE html><html><head><style> div{ width:100px; height:100px; background-color:#d5d5d5; color:white; animation:myfirst 5s infinite;}@keyframes myfirst{ 0% {margin-left:20px;} 25% {margin-left:520px;transform: rotateY(360deg);} 50% {margin-top:120px;transform: rotateX(180deg);} 75% {margin-left:320px;transform: rotateY(360deg);} 100% {margin-top:0px;transform: rotateX(180deg);}}</style></head><body><div> 飞啊飞</div></body></html> 属性自己去查吧。太多。
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