.bold {
  font-weight: 700; }

.mod_down_panel {
  width: 820px;
  margin: 0 auto; }
  .mod_down_panel .head {
    padding: 24px 40px 20px;
    min-height: 64px; }
    .mod_down_panel .head .logo {
      display: inline-block;
      width: 64px;
      float: left;
      padding-right: 6px; }
    .mod_down_panel .head h1, .mod_down_panel .head h2 {
      font-size: 14px;
      font-weight: normal;
      color: #333; }
    .mod_down_panel .head h1 {
      font-size: 24px;
      margin-top: 15px; }
  .mod_down_panel .describe {
    padding: 0 40px 10px;
    font-size: 16px;
    line-height: 24px;
    border-bottom: 1px #797979 solid;
    text-indent: 2em; }
  .mod_down_panel .down_item {
    padding: 26px 40px; }
    .mod_down_panel .down_item li {
      float: left;
      width: 33.3%;
      line-height: 16px; }
      .mod_down_panel .down_item li .doown_link {
        display: block;
        cursor: pointer;
        width: 180px;
        height: 38px;
        line-height: 38px;
        background: #50abfc url("../../images/SFLaser/os_ico.png") no-repeat;
        background-position: 16px 0px;
        text-indent: 66px;
        color: #FFF;
        border-radius: 5px;
        margin-bottom: 14px;
        position: relative; }
        .mod_down_panel .down_item li .doown_link .QR_code {
          position: absolute;
          top: 40px;
          left: 0px;
          z-index: 10;
          width: 180px;
          display: none; }
      .mod_down_panel .down_item li .doown_link:hover {
        background-color: #ff6600; }
        .mod_down_panel .down_item li .doown_link:hover .QR_code {
          display: inline-block; }
    .mod_down_panel .down_item li.pc .doown_link {
      background-position: 16px -1px; }
    .mod_down_panel .down_item li.android .doown_link {
      background-position: 16px -41px; }
    .mod_down_panel .down_item li.ios .doown_link {
      background-position: 16px -81px; }
  .mod_down_panel .addition_dec {
    padding: 0 40px 26px;
    font-size: 14px;
    line-height: 26px; }
    .mod_down_panel .addition_dec p {
      text-indent: 2em; }