这是一个介绍html5相关技术的工具网站，网站本身就是有html5|css3写成，虽然对于电脑配置差点的同学来说浏览起来有点卡，但是还是值得学习的，毕竟html5才是今后的主流技术。

网址：http://html5please.com/

我完全是因为html5的原因才注意到了这个网站，国内用html5完成的网站太少了，教程一大把，却鲜有实际项目产生。这个网站用html5实现的div效果让人映像深刻：可以500%提高开发效率的前端UI框架！

我将代码提取出来，很简单，不过这也是html5的魅力所在，顺便了解一下article标签。

html代码： 可以500%提高开发效率的前端UI框架！

        <article class="fallback prefixes">
            <header>
              <h2 class="name" id="border-image">border-image </h2>
              <h3 class="status use">use <i>with <b class=fallback>fallback</b></i> </h3>
              <h4 class="kind css">css</h4>
            </header>
            <div class="more">
              <div class="recco">
                <p>Make sure to use all the right prefixes (<code>-o-</code>, <code>-webkit-</code>, <code>-ms-</code>, <code>-moz-</code>). Additionally, <a href=http://www.mamicode.com/"http://border-image.com/">border-image.com may help. You should let this fall back to either a normal solid border or no border at all, depending on whether a border is essential for readability. We recommend that you avoid polyfills.
> 

css代码： 可以500%提高开发效率的前端UI框架！
article {
  color: #232927;
  margin-bottom: 2em; }
  article .tags {
    display: none; }
article > header {
  -webkit-transition: background-color 100ms ease-in;
  -moz-transition: background-color 100ms ease-in;
  -ms-transition: background-color 100ms ease-in;
  -o-transition: background-color 100ms ease-in;
  transition: background-color 100ms ease-in;
  background: #d3e0e4;
  border-radius: 0.3rem;
  position: relative;
  z-index: 1;
  cursor: pointer;
  /*
  &:hover:before {
    @include transform(rotate(270deg));
  }
  */ }
  article > header:hover {
    background: #e3d7bf; }
  article > header:before {
    -webkit-transition: all 100ms ease-in;
    -moz-transition: all 100ms ease-in;
    -ms-transition: all 100ms ease-in;
    -o-transition: all 100ms ease-in;
    transition: all 100ms ease-in;
    display: inline-block;
    vertical-align: middle;
    content: "+";
    line-height: 1;
    font-size: 1.5rem;
    border-radius: 1.5rem;
    height: 1.5rem;
    width: 1.5rem;
    margin: 0 0.5rem 0 1rem;
    text-align: center;
    color: white;
    text-shadow: 1px 1px 1px #476871;
    background: #b4cad0;
    border: 1px solid #95b4bc; }
  article > header .kind, article > header .name, article > header .status {
    display: inline-block;
    vertical-align: middle;
    pointer-events: none; }
  article > header i {
    font-style: normal; }
  article > header .kind, article > header b {
    font-weight: normal; }
article div.more {
  -webkit-transition: opacity 1s ease-in;
  -moz-transition: opacity 1s ease-in;
  -ms-transition: opacity 1s ease-in;
  -o-transition: opacity 1s ease-in;
  transition: opacity 1s ease-in;
  display: none;
  opacity: 0;
  background: white;
  border-radius: 0 0 0.3rem 0.3rem;
  padding: 0.5em 1em 1.5em 1em;
  margin: -0.3rem 1px 0 1px;
  position: relative;
  z-index: 0;
  box-shadow: 0 0 7px #0c0d0d; }
  article div.more .polyfills b {
    font-weight: bold; }
  article div.more .polyfills p {
    display: inline; }
  article div.more .links {
    font-size: 0.8em;
    position: absolute;
    bottom: 0.5em;
    right: 1em; }
    article div.more .links a {
      padding: 0.25em 0.5em; }
    article div.more .links a:hover {
      background: #149cd7;
      color: #fff;
      border-radius: 5px;
      text-decoration: none;
      text-shadow: 1px 1px 1px #232927; }
article.expanded > header {
  border-bottom: 1px solid #91a19b; }
  article.expanded > header:before {
    content: "-";
    line-height: 0.75;
    -webkit-transform: none;
    -moz-transform: none;
    -ms-transform: none;
    -o-transform: none;
    transform: none; }
article.expanded div.more {
  opacity: 1; }
.kind {
  font-size: 0.8em;
  line-height: 3rem;
  color: #e3d7bf;
  position: absolute;
  left: -5em;
  text-align: right;
  width: 4.5em;
  z-index: 1;
  text-shadow: 1px 1px 1px #232927; }
.name {
  padding: 0.4rem 0;
  color: #107aa8;
  text-shadow: 0 1px 0px white; }
#noitems {
  text-align: center; }
.status {
  font-size: 2em;
  border-radius: 0 0.2rem 0.2rem 0;
  padding: 0 1rem 0 0.5rem;
  color: white;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.6);
  position: relative;
  float: right; }
  .status:before, .status:after {
    content: "";
    height: 50%;
    width: 0.8em;
    position: absolute;
    left: -0.8em; }
  .status:before {
    top: 0; }
  .status:after {
    bottom: 0; }
  .status i {
    font-size: 0.3em;
    display: inline-block;
    line-height: 1;
    text-transform: none;
    font-weight: normal; }
    .status i b {
      font-size: 1.5em; }
  .status.avoid {
    background: #d92626;
    box-shadow: -4px 0px 4px #c32222 inset;
    border-right-color: #a51d1d; }
    .status.avoid:before {
      background: -webkit-linear-gradient(34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: -moz-linear-gradient(34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: -o-linear-gradient(34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: linear-gradient(34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: linear-gradient(56deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%); }
    .status.avoid:after {
      background: -webkit-linear-gradient(-34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: -moz-linear-gradient(-34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: -o-linear-gradient(-34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: linear-gradient(-34deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%);
      background: linear-gradient(124deg, rgba(217, 38, 38, 0), rgba(217, 38, 38, 0) 50%, #c32222 53%, #d92626 56%); }
  .status.use {
    background: #60ac39;
    box-shadow: -4px 0px 4px #559933 inset;
    border-right-color: #467e2a; }
    .status.use:before {
      background: -webkit-linear-gradient(34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: -moz-linear-gradient(34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: -o-linear-gradient(34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: linear-gradient(34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: linear-gradient(56deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%); }
    .status.use:after {
      background: -webkit-linear-gradient(-34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: -moz-linear-gradient(-34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: -o-linear-gradient(-34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: linear-gradient(-34deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%);
      background: linear-gradient(124deg, rgba(96, 172, 57, 0), rgba(96, 172, 57, 0) 50%, #559933 53%, #60ac39 56%); }
  .status.caution {
    background: #ffaa00;
    box-shadow: -4px 0px 4px #e69900 inset;
    border-right-color: #c28100; }
    .status.caution:before {
      background: -webkit-linear-gradient(34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: -moz-linear-gradient(34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: -o-linear-gradient(34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: linear-gradient(34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: linear-gradient(56deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%); }
    .status.caution:after {
      background: -webkit-linear-gradient(-34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: -moz-linear-gradient(-34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: -o-linear-gradient(-34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: linear-gradient(-34deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%);
      background: linear-gradient(124deg, rgba(255, 170, 0, 0), rgba(255, 170, 0, 0) 50%, #e69900 53%, #ffaa00 56%); }
 

一个html5做的网站，以及article标签的用法