使用方法：
1、head引入css文件
<link rel="stylesheet" href="css/style.css"/>
2、body引入部分
<main>
<section id="head">
<section id="left-ear"> </section>
<section id="right-ear"> </section>
<section id="eyes">
<section id="left-eye" class="eye"> </section>
<section id="right-eye" class="eye"> </section>
</section>
<section id="nose"></section>
<section id="mouth">
<section id="left-cheek" class="cheek"> </section>
<section id="right-cheek" class="cheek"> </section>
</section>
</section>
<section id="body">
<section id="collar">
<section id="tag-ring"></section>
</section>
<section id="nameplate"> <span id="name"> Kitty </span> </section>
<section id="chest"> </section>
</section>
</main>
