.snsBox{
  width: 750px;
  margin: 0px auto;
}
.snsBox ul{
  width: 600px;
  margin: 0 auto;
  overflow: hidden;
  padding: 0;
}
.snsBox li{
  float: left;
  margin: 0 10px;
  list-style: none;
}

.sns_bg{
	background-color:#d7d7d7;
	padding:40px 0;
	margin:40px 0;
}


@media screen and (max-width: 640px) {

	.snsBox{
	  width: 100%;
	  margin: 0px auto;
	}
	.snsBox ul{
	width: 300px;
	  overflow: hidden;
	  text-align: center;
	  letter-spacing: -0.4em;
	}
	.snsBox ul li{
	  width: 90px;
	  margin: 0 5px;
	  display: inline-block;
	  letter-spacing: normal;
	}
	.snsBox ul li img{
	  width: 100%;
	  height: auto;
	}

	.sns_bg{
	padding:20px 0;
	margin:20px 0;
	}
}