@media only screen and (max-width: 500px) {
  .head-v3 {
    width: 100%;
  }
  .head-v3 .navigation-up {
    border-bottom: 1px solid #ddd;
  }
  .head-v3 .navigation-up .navigation-v3 {
    margin-left: 0;
  }
  .head-v3 .navigation-up .navigation-inner {
    margin: 0;
  }
  .head-v3 .navigation-up #caidan {
    display: block !important;
    width: 40px;
    height: 40px;
    line-height: 20px;
    position: absolute;
    top: 15px;
    right: 25px;
  }
  .head-v3 .navigation-up .show_mobile ul {
    background: #fafafa;
  }
  .head-v3 .navigation-up .show_mobile ul li {
    height: 40px;
    overflow: hidden;
  }
  .head-v3 .navigation-up .show_mobile ul li h2 {
    line-height: 40px;
  }
  .head-v3 .navigation-up .show_mobile ul li h2 a {
    line-height: 40px;
  }
  .head-v3 .navigation-up .show_mobile ul .nav-up-selected {
    background: #ccc;
    opacity: 0.8;
  }
  .head-v3 .navigation-up .show_mobile ul li:first-child {
    height: 80px;
    background: #fff;
    border-bottom: 1px solid #ddd;
  }
  .head-v3 .navigation-up ul li {
    height: 0;
    overflow: hidden;
    float: none;
    transition: height .2s;
  }
  .head-v3 .navigation-up ul li a {
    line-height: 40px;
    font-size: 14px;
  }
  .head-v3 .navigation-up ul li:first-child {
    height: 80px;
    background: #fff;
    border-bottom: 1px solid #ddd;
  }
  .head-v3 .navigation-down {
    left: 182px;
    width: 170px;
  }
  .head-v3 .navigation-down .navigation-down-inner {
    margin: 0!important;
    width: 100%;
  }
  .head-v3 .navigation-down dl {
    margin: 10px 0 10px 20px !important;
    width: 100%;
  }
  .head-v3 .navigation-down dl dd a {
    font-size: 12px;
  }
  .calltoaction {
    background-repeat: no-repeat !important;
  }
}