style.css

/* Reset */
* {
	box-sizing:border-box;
	-moz-box-sizing:border-box;
	-webkit-box-sizing:border-box;
}
html,body {
	height:100%;
}
html {
	font:14px/1.3 "Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;
}
@media (min-width:34em) {
	html {
		font-size:18px;
	}
}
body {
	background-color:#fff;
	color:#555;
	font-size:1rem;
	padding:1.5rem;
	text-align:center;
}
h1,h2 {
	line-height:1;
	margin-bottom:.5rem;
	margin-top:0;
	text-rendering:optimizeLegibility;
}
p {
	margin-bottom:.5rem;
	margin-top:0;
}
a {
	color:#08c;
	text-decoration:none;
}
a:hover {
	text-decoration:underline;
}

/* Repo button */
.btn {
	background-color:#3072b3; /* Old browsers */
	background-image:linear-gradient(top,#599bdc 0%,#3072b3 100%); /* W3C */
	background-image:-moz-linear-gradient(top,#599bdc 0%,#3072b3 100%); /* FF3.6+ */
	background-image:-o-linear-gradient(top,#599bdc 0%,#3072b3 100%); /* Opera 11.10+ */
	background-image:-webkit-gradient(linear,left top,left bottom,color-stop(0%,#599bdc),color-stop(100%,#3072b3)); /* Chrome,Safari4+ */
	background-image:-webkit-linear-gradient(top,#599bdc 0%,#3072b3 100%); /* Chrome 10+,Safari 5.1+ */
	background-image:-ms-linear-gradient(top,#599bdc 0%,#3072b3 100%); /* IE10+ */
	filter:progid:DXImageTransform.Microsoft.gradient( startColorstr='#599bdc',endColorstr='#3072b3',GradientType=0 ); /* IE6-9 */
	background-repeat:repeat-x; /* Repeat the gradient */
	border:1px solid #2967a4;
	border-radius:6px;
	box-shadow:inset 0 1px 0 rgba(255,255,255,.1),0 1px 2px rgba(0,0,0,.2);
	color:#fff;
	font-size:1.2rem;
	padding:.75rem 1.5rem;
	text-decoration:none;
	text-shadow:0 -1px 0 rgba(0,0,0,.5);
	transition:none;
	 -moz-transition:none;
	-webkit-transition:none;
}
.btn:hover {
	background-position:0 -15px;
	text-decoration:none;
}
.btn:active {
	background-color:#3072b3; /* Old browsers */
	background-image:none;
	box-shadow:inset 0 5px 10px rgba(0,0,0,.125),0 1px 2px rgba(0,0,0,.2);
}

/* Masthead */
.masthead {
	margin-bottom:2rem;
}
.masthead h1 {
	font-size:4rem;
}
.masthead .introducing {
	color:#999;
	margin-bottom:1rem;
}
.masthead .tagline {
	font-size:1.25rem;
	margin-bottom:2rem;
}

/* Grid and columns */
.col {
	margin-bottom:3.5rem;
	text-align:center;
}
.container {
	margin-left:auto;
	margin-right:auto;
	max-width:820px;
}
@media (min-width:40em) {
	.grid {
		display:table;
		table-layout:fixed;
		width:100%;
	}
	.col {
		display:table-cell;
		margin-bottom:0;
	}
}

/* Misc */
hr {
	background-color:#eee;
	border:0;
	display:block;
	height:1px;
	margin-bottom:1.5rem;
	width:7rem;
}
.footer img {
	border-radius:4px;
}