react-tetris/src/components/guide/index.less

.background(@from, @to){
  background: (@from + @to)/2;
  background: -webkit-gradient(linear, left top, left bottom, from(@from), to(@to));
  background: -moz-linear-gradient(top,  @from,  @from);
  // IE9使用filter背景渐变, 但因为使用了borader-radius, 所以不兼容, IE9使用中和的背景色即可
  //filter:  progid:DXImageTransform.Microsoft.gradient(startColorstr='@{from}', endColorstr='@{to}');
}

.guide {
  position: absolute;
  left: 115%;
  right: 115%;
  text-align:center;
  line-height: 1;
  white-space: nowrap;
  &.right{
    right: auto;
    bottom: 5%;
  }
  &.left{
    left: auto;
    bottom: 5%;
  }
  p{
    text-align: left;
    margin-bottom: 350px;
    opacity: .5;
    iframe{
      margin-top: 20px;
    }
  }

  a{
    color:#005850;
    font-size:30px;
    position:relative;
    z-index:1;
    cursor: alias;
    text-decoration: none;
  }
  &.qr{
    left: auto;
    top: 5%;
    width: 250px;
    height:250px;
    opacity: .5;
    text-align: right;
    cursor: none;
    &:hover{
      img{
        width: 100%;
        height: 100%;
      }
    }
    img{
      width: 38px;
      height: 38px;
    }
  }

  &>div{
    width: 100px;
    height: 54px;
    background: /*#404040*/#364d4b;
    display:inline-block;
    border-radius: 4px;
    position: relative;
    color: #acc3c1;
    font-size: 16px;
    em {
      display: block;
      width: 0;
      height: 0;
      border: 6px solid;
      border-color: transparent transparent /*#ccc*/#acc3c1;
      position: absolute;
      top: 50%;
      left: 50%;
      margin: -9px 0 0 -6px;
    }
    &:before, &:after{
      content: '';
      display: block;
      width: 100%;
      height: 100%;
      position: absolute;
      top: 0;
      left: 0;
      border-radius:4px;
      box-shadow: 0 5px 10px rgba(255, 255, 255, .15) inset;
    }
    &:before{
      box-shadow: 0 -5px 10px rgba(0, 0, 0, .15) inset;
    }
  }
  .up{
    height: 60px;
    display:block;
    margin:0 auto 2px;
  }
  .down{
    margin:0 10px;
  }
  .space{
    left: auto;
    bottom: 5%;
    height: 80px;
    width: 400px;
    line-height: 80px;
    letter-spacing: 2px;
  }
}