img {
	width: auto;
	height: auto;
	max-width: 100%;
	max-height: 100%;
}

.embed-container {
	position: relative;
	padding-bottom: 56.25%;
	height: 0;
	overflow: hidden;
	max-width: 100%;
}

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

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.sr-only-focusable:focus {
	position: static;
	width: auto;
	height: auto;
	margin: 0;
	clip: auto;
	white-space: normal;
	border-width: 4px;
	border-style: solid;
	border-color: #005fcc;
	box-shadow: 0 0 0 4px rgba(0, 95, 204, 0.3), 0 0 8px 4px rgba(0, 95, 204, 0.5);
	background-color: #000 !important;
	color: #fff !important;
	padding: 8px 16px;
	display: inline-block;
	z-index: 9999;
}

/* 快捷鍵標籤樣式 */
kbd {
	background-color: #f4f4f4;
	border: 1px solid #ccc;
	border-radius: 3px;
	padding: 0.2rem 0.4rem;
	font-size: 0.875rem;
	font-family: monospace;
	color: #333333; /* 深灰色文字，與 #f4f4f4 背景對比度約 10.2:1 */
	box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), inset 0 0 0 2px #fff;
}

/* 網站導覽頁面專用樣式 */
.usage-instructions {
	background-color: #f8f9fa;
	padding: 1.5rem;
	border-radius: 0.25rem;
	margin-bottom: 1.5rem;
}

.usage-instructions ul {
	padding-left: 1.5rem;
}

.usage-instructions kbd {
	background-color: #f4f4f4;
	border: 1px solid #ccc;
	border-radius: 3px;
	padding: 0.2rem 0.4rem;
	font-size: 0.875rem;
	font-family: monospace;
	color: #333333 !important; /* 深灰色文字，與 #f4f4f4 背景對比度約 10.2:1，符合 4.5:1 要求 */
}

.accesskey {
	display: inline-block;
	margin-right: 0.5rem;
	color: #005fcc;
	font-weight: 700;
	text-decoration: none;
}

.sitemap-section {
	border-left: 4px solid #f28500;
	padding-left: 1rem;
	margin-bottom: 1.5rem;
}

.sitemap-section h3 {
	color: #A85600;
	font-weight: 600;
}

.sitemap-section ul li {
	margin-bottom: 0.75rem;
}

.sitemap-section a {
	font-weight: 500;
	color: #0066cc;
	text-decoration: none;
}

.sitemap-section a:hover,
.sitemap-section a:focus {
	color: #A85600;
	text-decoration: underline;
}

.sitemap-section .text-muted {
	margin-top: 0.25rem;
}