.main {
		width: 100%;
		height: auto;
		margin-top: -5px;
		background: url('../images/background.jpg');
		background-size: cover;
		background-position: center;
		background-repeat: no-repeat;
		padding-bottom: 200px;
	}

	.chooseSpan {
		line-height: 50px;
		width: 150px;
		height: 55px;
		background-color: white;
		font-size: 1.6em;
		font-weight: bolder;
		color: rgb(32,73,111);
		font-family: 黑体;
		margin-top: 20px;
		display: inline-block;
		cursor: pointer;
	}

	.unChooseSpan {
		width: 150px;
		height: 50px;
		line-height: 50px;
		font-size: 1.6em;
		font-weight: bolder;
		color: white;
		font-family: 黑体;
		margin-top: 20px;
		display: inline-block;
		cursor: pointer;
	}

	.red-square {
      width: 0.5em;
      height: 0.5em;
      background-color: rgb(225,161,88);
      margin-right: 1em;
	  margin-top: 0.5em;
	  float: left;
    }

	.blue-square {
      width: 0.5em;
      height: 0.5em;
      background-color: rgb(63,152,247);
      margin-right: 1em;
	  margin-top: 0.5em;
	  float: left;
    }