/**重置标签默认样式*/
  * {
      margin: 0;
      padding: 0;
      list-style: none;
      font-family: '微软雅黑'
  }
  #container {
      width: 450px;
      height: 780px;
      background: #eee;
      margin: 5px auto 0;
      position: relative;
      box-shadow: 20px 20px 55px #777;
  }
  .header {
      background: #000;
      height: 40px;
      color: #fff;
      line-height: 34px;
      font-size: 20px;
      padding: 0 10px;
  }
  .footer {
      width: 430px;
      height: 50px;
      background: #666;
      position: absolute;
      bottom: 0;
      padding: 10px;
  }
  .footer input {
      width: 275px;
      height: 45px;
      outline: none;
      font-size: 20px;
      text-indent: 10px;
      position: absolute;
      border-radius: 6px;
      right: 80px;
  }
  .footer span {
      display: inline-block;
      width: 62px;
      height: 48px;
      background: #ccc;
      font-weight: 900;
      line-height: 45px;
      cursor: pointer;
      text-align: center;
      position: absolute;
      right: 10px;
      border-radius: 6px;
  }
  .footer span:hover {
      color: #fff;
      background: #999;
  }
  #user_face_icon {
      display: inline-block;
      background: red;
      width: 60px;
      height: 60px;
      border-radius: 30px;
      position: absolute;
      bottom: 6px;
      left: 14px;
      cursor: pointer;
      overflow: hidden;
  }
  img {
      width: 60px;
      height: 60px;
  }
  .content {
      font-size: 20px;
      width: 435px;
      height: 662px;
      overflow: auto;
      padding: 5px;
  }
  .content li {
      margin-top: 10px;
      padding-left: 10px;
      width: 412px;
      display: block;
      clear: both;
      overflow: hidden;
  }
  .content li img {
      float: left;
  }
  .content li span{
      background: #7cfc00;
      padding: 10px;
      border-radius: 10px;
      float: left;
      margin: 6px 10px 0 10px;
      max-width: 310px;
      border: 1px solid #ccc;
      box-shadow: 0 0 3px #ccc;
  }
  .content li img.imgleft { 
      float: left; 
  }
  .content li img.imgright { 
      float: right; 
  }
  .content li span.nickleft { 
      float: left;  
      background:#eee;   
      padding: 0px;
      border-radius: 0px;
      margin: 6px 10px 0 10px;
      max-width: 310px;
      border: 0px solid #ccc;
      box-shadow: 0 0 0px #ccc; 
      width:90%;
      text-align:left;
      font-size:16px;
      color:#aaa;
  }
  .content li span.nickright { 
      float: right;  
      background:#eee;   
      padding: 0px;
      border-radius: 0px;
      margin: 6px 10px 0 10px;
      max-width: 310px;
      border: 0px solid #ccc;
      box-shadow: 0 0 0px #ccc; 
      width:90%;
      text-align:right;
      font-size:16px;
      color:#aaa;
  }
  .content li div.sysinfo { 
      font-size:16px;
      border-radius: 5px;
      background:#ddd;   
      color:#fff;
      text-align: center;
      width:auto;
    }
  .content li span.spanleft { 
      float: left;
      background: #fff;
  }
  .content li span.spanright { 
      float: right;
      background: #7cfc00;
  }