CSS3绘制有活力的链接下划线方法

  
  
  




   

     悬停在我上面
   

h2 > a {   
      position: relative;   
      color: #000;   
      text-decoration: none;   
}   

h2 > a:hover {   
      color: #000;   
}

h2 > a:before {   
      content: "";   
      position: absolute;   
      width: 100%;   
      height: 2px;   
      bottombottom: 0;   
      left: 0;   
      background-color: #000;   
      visibility: hidden;   
      -webkit-transform: scaleX(0);   
      transform: scaleX(0);   
      -webkit-transition: all 0.3s ease-in-out 0s;   
      transition: all 0.3s ease-in-out 0s;   
}

h2 > a:hover:before {   
      visibility: visible;   
      -webkit-transform: scaleX(1);   
      transform: scaleX(1);   
}