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  Bootstrap 4 Grid Introduce<br />
  <a href="http://muki.tw/tech/bootstrap4-grid-introduce/" target="_blank">(http://muki.tw/tech/bootstrap4-grid-introduce/)</a>

<div class="container">
  <div class="row">
    <div class="col-md">A</div>
    <div class="col-md">B</div>
    <div class="col-md">C</div>
  <div class="row">
    <div class="col-md">col-md</div>
    <div class="col-md-5">col-md-5</div>
    <div class="col-md">col-md</div>
              @import "compass/css3";

Bootstrap 4 Grid Introduce
Autohr: Muki Wu

/* basic layout start (you can skip it) */
body {
  background: #333;
  font-size: 1em;
  color: #f0f0f0;
  line-height: 1.1em;
a {
  text-decoration: none;
  color: #313131;
  &:hover {
    color: #000;
section {
  width: 500px;
  margin: 0 auto;
  background: #555;
  padding: 1em;
  div {
    margin: 0 0 2em 0;
header {
  background: #d9444a;
  text-align: center;
  color: #fff;
  padding: .7em 0;
  a {
    color: rgba(255,255,255,.6);
    @include text-shadow(1px 1px 1px #973735);
  &:after {
    content: " ";
    position: absolute;
    width: 0;
    height: 0;
    border-width: 10px;
    border-style: solid;
    border-color: #d9444a transparent transparent transparent;
    top: 53px;
    left: 50%;

h2 {
  font-size: 1em;
  margin: 0 0 .5em 0;
  background: #444;
  display: inline-block;
  padding: .5em 1.2em;
  position: relative;
  left: -1em;

/* Bootstrap Introduce Start */

.container {
  margin-top: 2em;
  color: #333;

h1 {
  color: #eee;
  font-size: 20px;

.row>[class^=col] {
  padding-top: .75rem;
	padding-bottom: .75rem;
	background-color: #eee;
	border: 1px solid rgba(86,61,124,1);
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