/* SEO 落地页专用样式（不复用 .dh 固定 66px，避免导航文字溢出） */
.seo-header{
	background:#fff;
	border-bottom:1px solid #e8e8e8;
	width:100%;
	overflow:hidden;
}
.seo-header-inner{
	width:1200px;
	max-width:100%;
	margin:0 auto;
	padding:12px 16px;
	box-sizing:border-box;
	overflow:hidden;
}
.seo-logo{
	float:left;
	display:block;
	line-height:0;
}
.seo-logo img{
	width:150px;
	height:60px;
	display:block;
}
.seo-actions{
	float:right;
	margin-top:15px;
}
.seo-btn-primary,
.seo-btn-outline{
	display:inline-block;
	width:78px;
	height:30px;
	line-height:28px;
	text-align:center;
	border-radius:5px;
	font-size:14px;
	text-decoration:none;
	box-sizing:border-box;
	margin-left:8px;
}
.seo-btn-primary{
	background:#1ea0fa;
	border:1px solid #1ea0fa;
	color:#fff !important;
}
.seo-btn-outline{
	background:#fff;
	border:1px solid #1ea0fa;
	color:#1ea0fa !important;
}
.seo-nav{
	float:right;
	list-style:none;
	margin:0 24px 0 0;
	padding:0;
	height:60px;
}
.seo-nav li{
	float:left;
	margin-left:28px;
	line-height:60px;
	width:auto !important;
}
.seo-nav a{
	color:#000;
	text-decoration:none;
	font-size:15px;
	white-space:nowrap;
}
.seo-nav a:hover{
	color:#1ea0fa;
	border-bottom:2px solid #1ea0fa;
}

.seo-wrap{
	width:1000px;
	max-width:100%;
	margin:24px auto 48px;
	padding:0 16px;
	box-sizing:border-box;
	clear:both;
	overflow:hidden;
}
.seo-crumb{
	font-size:13px;
	color:#666;
	margin-bottom:12px;
	clear:both;
}
.seo-crumb a{color:#336699;}
.seo-h1{
	font-size:22px;
	font-weight:bold;
	color:#222;
	line-height:1.4;
	margin:8px 0 12px;
}
.seo-h2{
	font-size:18px;
	font-weight:bold;
	color:#222;
	margin:0 0 12px;
}
.seo-meta{
	font-size:13px;
	color:#999;
	margin-bottom:16px;
}
.seo-box{
	background:#fff;
	border:1px solid #e6e6e6;
	padding:20px 22px;
	margin-bottom:16px;
	overflow:hidden;
}
.seo-stem{
	font-size:16px;
	line-height:1.7;
	color:#333;
	margin-bottom:14px;
}
.seo-opt{list-style:none;padding:0;margin:0;}
.seo-opt li{
	padding:10px 12px;
	margin-bottom:8px;
	background:#f7f9fc;
	border:1px solid #e8eef5;
	border-radius:4px;
	line-height:1.6;
}
.seo-opt .k{
	display:inline-block;
	width:22px;
	font-weight:bold;
	color:#1a5fb4;
}
.seo-cta{
	display:block;
	text-align:center;
	margin:18px 0 8px;
	padding:12px 20px;
	background:#c9a227;
	color:#fff !important;
	font-size:16px;
	font-weight:bold;
	border-radius:4px;
	text-decoration:none;
}
.seo-cta:hover{opacity:.92;}
.seo-cta-sub{
	display:block;
	text-align:center;
	font-size:13px;
	color:#888;
	margin-bottom:8px;
}
.seo-tip{
	background:#fff8e6;
	border:1px solid #f0d78c;
	padding:10px 12px;
	font-size:13px;
	color:#6a5500;
	margin:12px 0;
}
.seo-list{
	list-style:none;
	padding:0;
	margin:0;
	clear:both;
}
.seo-list li{
	padding:12px 0;
	border-bottom:1px dashed #eee;
	overflow:hidden;
	line-height:1.6;
}
.seo-list a{
	color:#1a5fb4;
	font-size:15px;
	line-height:1.5;
}
.seo-tag{
	display:inline-block;
	font-size:12px;
	padding:2px 8px;
	background:#eef3fa;
	color:#1a5fb4;
	border-radius:3px;
	margin-right:8px;
	vertical-align:middle;
	white-space:nowrap;
}
.seo-lock{
	color:#999;
	font-size:14px;
	padding:24px;
	text-align:center;
	background:#fafafa;
	border:1px dashed #ddd;
}
.seo-kw{margin:8px 0 16px;overflow:hidden;}
.seo-kw span{
	display:inline-block;
	margin:0 6px 6px 0;
	padding:3px 10px;
	background:#f0f0f0;
	font-size:12px;
	color:#555;
	border-radius:3px;
}
.seo-intro{
	font-size:14px;
	line-height:1.8;
	color:#444;
	margin-bottom:16px;
}
.seo-pager{
	margin:20px 0 8px;
	text-align:center;
	line-height:2;
	clear:both;
}
.seo-pager a,
.seo-pager span.cur{
	display:inline-block;
	min-width:28px;
	margin:0 3px;
	padding:2px 8px;
	border:1px solid #ddd;
	border-radius:3px;
	text-decoration:none;
	color:#1a5fb4;
	font-size:13px;
}
.seo-pager span.cur{
	background:#1ea0fa;
	border-color:#1ea0fa;
	color:#fff;
}
.seo-pager-info{
	display:block;
	margin-top:8px;
	color:#999;
	font-size:12px;
	border:none !important;
}
.seo-hub{
	margin:12px 0 16px;
	overflow:hidden;
}
.seo-hub a{
	display:inline-block;
	margin:0 10px 8px 0;
	padding:6px 12px;
	background:#eef6fc;
	color:#1a5fb4;
	border-radius:4px;
	text-decoration:none;
	font-size:13px;
}
.seo-hub a:hover{background:#1ea0fa;color:#fff;}
.seo-player-wrap{
	position:relative;
	width:100%;
	padding-top:56.25%;
	background:#000;
	margin:12px 0;
	overflow:hidden;
	border-radius:6px;
}
.seo-player{
	position:absolute;
	left:0;top:0;
	width:100%;
	height:100%;
	border:0;
}
.seo-footer-simple{
	clear:both;
	text-align:center;
	padding:24px 16px 40px;
	font-size:12px;
	color:#999;
	border-top:1px solid #eee;
	margin-top:20px;
}
.seo-footer-simple a{color:#666;margin:0 8px;}

.seo-outline{margin-top:8px;}
.seo-chapter{margin-bottom:16px;border:1px solid #eee;border-radius:6px;overflow:hidden;}
.seo-chapter-hd{padding:10px 12px;background:#f5f8fc;font-size:15px;color:#222;}
.seo-lesson-list{padding:0 12px 8px;margin:0;}
.seo-player-box{position:relative;background:#000;margin:12px 0;border-radius:6px;overflow:hidden;}
.seo-preview-mask{position:absolute;left:0;top:0;right:0;bottom:0;background:rgba(0,0,0,.78);color:#fff;text-align:center;padding-top:120px;z-index:20;}
.seo-preview-mask p{font-size:18px;margin-bottom:16px;}
.seo-preview-mask .seo-cta{display:inline-block;max-width:280px;margin:0 auto;}

/* 讲师专题 */
.seo-filter{
	margin:12px 0 0;
	overflow:hidden;
}
.seo-filter a{
	display:inline-block;
	margin:0 8px 8px 0;
	padding:4px 10px;
	font-size:13px;
	color:#555;
	background:#f5f5f5;
	border-radius:3px;
	text-decoration:none;
}
.seo-filter a:hover,
.seo-filter a.cur{
	background:#1ea0fa;
	color:#fff;
}
.seo-lec-grid{
	list-style:none;
	margin:0;
	padding:0;
	overflow:hidden;
}
.seo-lec-card{
	margin:0 0 14px;
	padding:0 0 14px;
	border-bottom:1px solid #f0f0f0;
	overflow:hidden;
}
.seo-lec-card:last-child{border-bottom:0;padding-bottom:0;}
.seo-lec-card-link{
	display:block;
	overflow:hidden;
	color:inherit;
	text-decoration:none;
}
.seo-lec-avatar{
	float:left;
	width:72px;
	height:72px;
	border-radius:6px;
	object-fit:cover;
	background:#eef3f8;
	margin-right:14px;
}
.seo-lec-avatar-lg{
	width:96px;
	height:96px;
}
.seo-lec-avatar-empty{
	display:block;
	line-height:72px;
	text-align:center;
	font-size:22px;
	color:#8aa4c0;
}
.seo-lec-avatar-lg.seo-lec-avatar-empty{line-height:96px;font-size:28px;}
.seo-lec-card-body{display:block;overflow:hidden;}
.seo-lec-name{
	display:block;
	font-size:16px;
	font-weight:bold;
	color:#1a5fb4;
	margin-bottom:4px;
}
.seo-lec-intro{
	display:block;
	font-size:13px;
	color:#666;
	line-height:1.5;
	margin-top:4px;
}
.seo-lec-hero{overflow:hidden;}
.seo-lec-hero .seo-lec-avatar{margin-bottom:8px;}
.seo-lec-hero-body{overflow:hidden;}
.seo-lec-hero-body .seo-h1{margin-top:0;}
.seo-lec-hero-body .seo-meta a{color:#336699;}

/* 题目分类 SEO */
.seo-cat-block{
	margin:12px 0 16px;
	padding:12px 14px;
	background:#f7fafc;
	border:1px solid #e8eef5;
	border-radius:4px;
}
.seo-cat-row{
	margin:0 0 8px;
	font-size:14px;
	line-height:1.5;
	color:#333;
	overflow:hidden;
}
.seo-cat-row:last-child{margin-bottom:0;}
.seo-cat-label{
	display:inline-block;
	min-width:42px;
	margin-right:8px;
	padding:1px 6px;
	font-size:12px;
	color:#1a5fb4;
	background:#e8f2fc;
	border-radius:3px;
	vertical-align:middle;
}
.seo-cat-row a{color:#1a5fb4;text-decoration:none;}
.seo-cat-row a:hover{text-decoration:underline;}
.seo-cat-full{font-size:13px;color:#666;}