html, body, ul, li, ol, dl, dd, dt, p, h1, h2, h3, h4, h5, h6, form, fieldset, legend, img, a, span {
    margin: 0;
    padding: 0;
    font-family: "SourceHanSansSC-bold";
  }
  fieldset, img, input, button {
    border: none;
    padding: 0;
    margin: 0;
    outline-style: none;
  }
  
  ul, ol {
    list-style: none;
  }
  
  img {
    border: 0;
    vertical-align: middle;
  }
  
  a {
    color: #666666;
    text-decoration: none;
  }

.clear {
  clear: both;
}

.clear:before {
    content: "";
    overflow: hidden;
}

body {
    margin: 0 auto;
    max-width: 640px;
    min-width: 320px;
    overflow-x: hidden;
    font: normal 14px/1.5 Tahoma, "Microsoft Yahei", Verdana, "Lucida Grande", STXihei, hei;
    color: rgb(62, 62, 62); 
    background-color: #f2f2f2;
    -webkit-tap-highlight-color: transparent;
}