/* css reset  */
* {
    margin: 0;
    padding: 0;
  }
  html, body {
  
  }
  
  a {
    text-decoration: none;
  }
  
  .g-wrap {
    width: 100%;
    height: 3366px;
    overflow: hidden;
    position: relative;
    font-size: 17px;
    color: #ffffff;
    text-align: center;
  }
  
  /*
   * author ysw 
   * date 9-19
   * 中秋节首页活动上新
   */
  
  /* 背景样式 */
  .bg {
    width: 100%;
    position: absolute;
  }
  
  .bg_1 {
    width: 100%;
    height: 482px;
    overflow: hidden;
    background:url(http://ossweb-img.qq.com/images/lol/v2/index/7th/bg_01.jpg) center top no-repeat;
  }
  
  .video-bg {
    position: absolute;
    left: 50%;
    margin-left: -960px;
  }
  .cover-img {
    position:absolute;
    z-index: 1;
    top: 369px;
    left: 50%;
    margin-left: -960px;
  }
  
  .bg_2 {
    width: 100%;
    height: 1853px;
    background:url(http://ossweb-img.qq.com/images/lol/v2/index/7th/bg_02.jpg) center top no-repeat;
  }
  .bg_3 {
    width: 100%;
    height: 1122px;
    background: url(http://ossweb-img.qq.com/images/lol/v2/index/7th/bg_03.jpg) center top no-repeat;
  }
  .main {
    width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    background-color: red;
  }
  
  .btn-top-bg {
    width: 235px;
    height: 84px;
    display:inline-block;
    background: url('http://ossweb-img.qq.com/images/lol/v2/index/7th/sprite-img.png');
    background-size:1335px 1194px;
    color: #bea468;
    text-align: center;
    line-height: 84px;
    background-position: -337px -615px;
  }
  
  .btn-top-bg:hover {
    background-position: -577px -615px;
    color: #472c0f;
  }
  
  .icon-arrow {
    width: 26px;
    height: 25px;
    background-position: -1281px -706px;
    background-image: url(http://ossweb-img.qq.com/images/lol/v2/index/7th/sprite-img.png);
    background-size: 1335px 1194px;
    margin-left: 10px;
    display:none;
    vertical-align: -7px;
  }
  
  .btn-top-bg:hover .icon-arrow {
    display: inline-block;
    animation: arr-ani 2s infinite linear;
  }
  
  @keyframes arr-ani {
    0% {
      transform: translateX(0);
    }
    10% {
      transform: translateX(5px);
    }
    20% {
      transform: translateX(0);
    }
    30% {
      transform: translateX(5px);
    }
    40% {
      transform: translateX(0);
    }
    55% {
      transform: translateX(0);
    }
    65% {
      transform: translateX(8px);
    }
    95% {
      transform: translateX(8px);
    }
    0% {
      transform: translateX(8px);
    }
  }
  