/* index主页 */

.head2{
  width: 100%;   
  margin:0 auto;
  height: 240px;
  background-color: #81Addd;
  color: #fff;
}

.main{
    text-align: center; 
    margin: 0 auto;
    width: 1100px;
  }
 
    .image:hover{
    filter:alpha(Opacity=80);-moz-opacity:0.7;opacity: 0.7; 
    transition-duration: 1s;
    }

    /* 征集条目 */
    .btn{
      background-color: #363636;
      color: #ffffffcc;
      height: 50px;
      text-align: center;
      padding: 10px;
      display: block;
      font-size: 15px;
}