<code id='D36C9E633F'></code><style id='D36C9E633F'></style>
    • <acronym id='D36C9E633F'></acronym>
      <center id='D36C9E633F'><center id='D36C9E633F'><tfoot id='D36C9E633F'></tfoot></center><abbr id='D36C9E633F'><dir id='D36C9E633F'><tfoot id='D36C9E633F'></tfoot><noframes id='D36C9E633F'>

    • <optgroup id='D36C9E633F'><strike id='D36C9E633F'><sup id='D36C9E633F'></sup></strike><code id='D36C9E633F'></code></optgroup>
        1. <b id='D36C9E633F'><label id='D36C9E633F'><select id='D36C9E633F'><dt id='D36C9E633F'><span id='D36C9E633F'></span></dt></select></label></b><u id='D36C9E633F'></u>
          <i id='D36C9E633F'><strike id='D36C9E633F'><tt id='D36C9E633F'><pre id='D36C9E633F'></pre></tt></strike></i>

          邯北京k10赛车下载app郸市

          CSS3渐变效果linear

          HTML5中CSS3背景渐变功能,主要有两种渐变方式:线性渐变和径向(放射性)渐变。一、线性渐变CSS3提供了linear-gradient 属性实现背景颜色的渐变功能。在以前,这种效果必须采用图片才...