body {
  font-family: 'Noto Sans TC', sans-serif;
}

a {
  text-decoration: none;
}

section {
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.section-bg {
  background-color: rgb(245,246,247);
}

.navbar-nav li:hover > ul.dropdown-menu {
display: block;
}

.dropdown-submenu {
position:relative;
}
.dropdown-submenu > .dropdown-menu {
top: 0;
left: 100%;
margin-top:-6px;
}

/* rotate caret on hover */
.dropdown-menu > li > a:hover:after {
text-decoration: underline;
transform: rotate(-90deg);
}


.bg-black {
    color: rgba(255, 255, 255, 0.8);
	background: #2d3246;
}

footer p {
	line-height: 1rem;
	margin-bottom: 0.2rem;
}

footer a {
	text-decoration: none;
	color:white;
}

blockquote {
	background:#dddddd;
	font-style:italic;
	/* margin-left:2rem; */
	padding: 1rem;
}


.dropdown-submenu {
  position: relative;
}

.dropdown-submenu a::after {
  transform: rotate(-90deg);
  position: absolute;
  right: 6px;
  top: .8em;
}

.dropdown-submenu .dropdown-menu {
  top: 0;
  left: 100%;
  margin-left: .1rem;
  margin-right: .1rem;
}

.embed-youtube {
  position: relative;
  padding-bottom: 56.25%; /* - 16:9 aspect ratio (most common) */
  /* padding-bottom: 62.5%; - 16:10 aspect ratio */
  /* padding-bottom: 75%; - 4:3 aspect ratio */
  padding-top: 30px;
  height: 0;
  overflow: hidden;
}

.embed-youtube iframe,
.embed-youtube object,
.embed-youtube embed {
  border: 0;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}