/* =========================================
   变量和全局样式 | VARIABLES & GLOBAL STYLES
   ========================================= */
:root {
	--primary-color: #2c3e50; /* 深蓝色 | Dark blue */
	--secondary-color: #3498db; /* 浅蓝色 | Light blue */
	--accent-color: #1abc9c; /* 青色强调 | Teal accent */
	--light-bg: #f8f9fa; /* 浅色背景 | Light background */
	--text-color: #333;
	--light-text: #666;
	--border-color: #e9ecef;
}

/* 
 * 重置和基础样式 | Reset and base styles 
 */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

body {
	color: var(--text-color);
	background-color: #fff;
	line-height: 1.6;
}

a {
	text-decoration: none;
	color: var(--accent-color);
}

.container {
	width: 100%;
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 15px;
}

/* =========================================
   头部样式 | HEADER STYLES
   ========================================= */
header {
	background-color: white;
	box-shadow: 0 1px 3px rgba(0,0,0,0.1);
	position: sticky;
	top: 0;
	z-index: 1000;
}

/* 顶部公告栏 | Top announcement bar */
.top-bar {
	background-color: var(--primary-color);
	color: white;
	padding: 8px 0;
	text-align: center;
	font-size: 0.9rem;
}

/* 主导航 | Main navigation */
.navigation {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 15px 0;
}

.logo img {
	height: 40px;
}

.nav-links {
	display: flex;
	list-style: none;
}

	.nav-links li {
		margin: 0px 10px;
		position: relative;
	}

	.nav-links a {
		color: var(--text-color);
		font-weight: 500;
		transition: color 0.2s;
	}

		.nav-links a:hover {
			color: var(--accent-color);
		}

/* 行动呼吁按钮 - 整个网站通用 | Call to action button - used throughout the site */
.cta-button {
	background-color: var(--accent-color);
	color: white !important;
	padding: 10px 20px;
	border-radius: 3px;
	font-weight: 500;
	transition: background-color 0.2s;
}

	.cta-button:hover {
		background-color: #16a085;
	}

/* =========================================
   首页横幅区域 | HERO SECTION
   ========================================= */
.hero {
	background-color: var(--primary-color);
	padding: 80px 0;
	text-align: center;
	color: white;
	position: relative;
}

	.hero h1 {
		font-size: 3.5rem;
		margin-bottom: 20px;
		font-weight: 600;
	}

	.hero p {
		font-size: 1.7rem;
		max-width: 800px;
		margin: 0 auto 30px;
		opacity: 0.9;
	}

/* =========================================
   数据统计区域 | STATS SECTION
   ========================================= */
.stats {
	padding: 50px 0;
	background-color: var(--light-bg);
}

.stats-container {
	display: flex;
	justify-content: space-around;
	flex-wrap: wrap;
	text-align: center;
}

.stat-item {
	padding: 20px;
	margin: 10px;
}

.stat-number {
	font-size: 1.8rem;
	font-weight: 600;
	color: var(--accent-color);
}

.stat-text {
	font-size: 1rem;
	color: var(--light-text);
	margin-top: 5px;
}

/* =========================================
   特色展示区域 | FEATURED SECTION
   ========================================= */
.featured {
	padding: 60px 0;
	text-align: center;
	background-color: white;
}

	/* 段落标题样式 - 多处使用 | Section title styling - used in multiple sections */
	.featured h2 {
		font-size: 1.8rem;
		margin-bottom: 40px;
		position: relative;
		display: inline-block;
	}

		.featured h2:after {
			content: '';
			position: absolute;
			bottom: -10px;
			left: 50%;
			transform: translateX(-50%);
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

.featured-logos {
	display: flex;
	justify-content: space-around;
	flex-wrap: wrap;
	align-items: center;
}

	.featured-logos img, .featured-logos div {
		opacity: 0.7;
		transition: opacity 0.2s;
	}

		.featured-logos img:hover, .featured-logos div:hover {
			opacity: 1;
		}

/* =========================================
   关于我们区域 | ABOUT SECTION
   ========================================= */
.about {
	padding: 70px 0;
	background-color: var(--light-bg);
}

	.about h2 {
		font-size: 1.8rem;
		margin-bottom: 30px;
		text-align: center;
		position: relative;
		display: inline-block;
	}

		.about h2:after {
			content: '';
			position: absolute;
			bottom: -10px;
			left: 50%;
			transform: translateX(-50%);
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

.about-content {
	display: flex;
	flex-direction: column;
	align-items: center;
}

.about-text {
	max-width: 800px;
	margin-bottom: 30px;
	text-align: center;
	line-height: 1.7;
}

/* 关于区域的特色勾选项 | Feature checkmarks used in about section */
.about-features {
	display: flex;
	justify-content: center;
	flex-wrap: wrap;
	margin-bottom: 20px;
}

.feature {
	margin: 10px 15px;
	font-weight: 500;
	display: flex;
	align-items: center;
	color: var(--primary-color);
}

	.feature:before {
		content: "✓";
		color: var(--accent-color);
		margin-right: 5px;
		font-weight: bold;
	}

.cta-section {
	margin-top: 30px;
	text-align: center;
}

/* =========================================
   解决方案区域 | SOLUTIONS SECTION
   ========================================= */
.solutions {
	padding: 70px 0;
	background-color: white;
}

	.solutions h2 {
		font-size: 1.8rem;
		margin-bottom: 40px;
		text-align: center;
		position: relative;
		display: inline-block;
	}

		.solutions h2:after {
			content: '';
			position: absolute;
			bottom: -10px;
			left: 50%;
			transform: translateX(-50%);
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

/* 解决方案卡片布局 | Card layout for solutions */
.solutions-container {
	display: flex;
	justify-content: space-around;
	flex-wrap: wrap;
}

.solution-card {
	width: 30%;
	min-width: 300px;
	margin-bottom: 30px;
	padding: 30px;
	background-color: white;
	box-shadow: 0 3px 10px rgba(0,0,0,0.05);
	border-radius: 3px;
	transition: transform 0.3s, box-shadow 0.3s;
	border: 1px solid var(--border-color);
}

	.solution-card:hover {
		transform: translateY(-5px);
		box-shadow: 0 5px 15px rgba(0,0,0,0.1);
	}

	.solution-card h3 {
		color: var(--primary-color);
		font-size: 1.3rem;
		margin-bottom: 15px;
		position: relative;
		padding-bottom: 10px;
	}

		.solution-card h3:after {
			content: '';
			position: absolute;
			bottom: 0;
			left: 0;
			width: 30px;
			height: 2px;
			background-color: var(--accent-color);
		}

	.solution-card p {
		margin-bottom: 15px;
		color: var(--light-text);
	}

/* =========================================
   服务区域 | SERVICES SECTION
   ========================================= */
.services {
	padding: 70px 0;
	background-color: var(--light-bg);
}

	.services h2 {
		font-size: 1.8rem;
		margin-bottom: 40px;
		text-align: center;
		position: relative;
		display: inline-block;
	}

		.services h2:after {
			content: '';
			position: absolute;
			bottom: -10px;
			left: 50%;
			transform: translateX(-50%);
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

/* 服务卡片布局 | Card layout for services */
.services-container {
	display: flex;
	justify-content: space-around;
	flex-wrap: wrap;
}

.service-card {
	width: 30%;
	min-width: 300px;
	margin-bottom: 30px;
	padding: 30px;
	background-color: white;
	box-shadow: 0 3px 10px rgba(0,0,0,0.05);
	border-radius: 3px;
	text-align: center;
	border: 1px solid var(--border-color);
}

.service-icon {
	font-size: 2rem;
	color: var(--accent-color);
	margin-bottom: 20px;
}

.service-card h3 {
	font-size: 1.3rem;
	margin-bottom: 15px;
	color: var(--primary-color);
}

.service-card p {
	color: var(--light-text);
}

.service-card a {
	display: inline-block;
	margin-top: 15px;
	font-weight: 500;
}

/* =========================================
   电子书区域 | EBOOK SECTION
   ========================================= */
.ebook-section {
	padding: 70px 0;
	background-color: var(--secondary-color);
	text-align: center;
	position: relative;
	color: white;
}

	.ebook-section h2 {
		font-size: 1.8rem;
		margin-bottom: 20px;
	}

	.ebook-section p {
		max-width: 800px;
		margin: 0 auto 30px;
	}

/* 电子书特点列表与勾选图标 | Ebook feature list with checkmarks */
.ebook-list {
	max-width: 600px;
	margin: 0 auto 30px;
	text-align: left;
	list-style-type: none;
}

	.ebook-list li {
		margin-bottom: 10px;
		padding-left: 25px;
		position: relative;
	}

		.ebook-list li:before {
			content: "✓";
			color: white;
			position: absolute;
			left: 0;
		}

/* =========================================
   FACEBOOK 小组区域 | FACEBOOK GROUP SECTION
   ========================================= */
.facebook-group {
	padding: 70px 0;
	background-color: white;
}

.facebook-container {
	max-width: 800px;
	margin: 0 auto;
	text-align: center;
}

	.facebook-container h2 {
		font-size: 1.8rem;
		margin-bottom: 20px;
		position: relative;
		display: inline-block;
	}

		.facebook-container h2:after {
			content: '';
			position: absolute;
			bottom: -10px;
			left: 50%;
			transform: translateX(-50%);
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

	.facebook-container p {
		margin-bottom: 20px;
		color: var(--light-text);
	}

/* 社交媒体链接 | Social media links */
.social-links {
	margin-top: 30px;
}

	.social-links a {
		display: block;
		margin: 10px 0;
		transition: color 0.2s;
	}

		.social-links a:hover {
			color: var(--primary-color);
		}

/* =========================================
   学习区域 | LEARNING SECTION
   ========================================= */
.learning-section {
	padding: 70px 0;
	background-color: var(--light-bg);
	text-align: center;
}

	.learning-section h2 {
		font-size: 1.8rem;
		margin-bottom: 20px;
		position: relative;
		display: inline-block;
	}

		.learning-section h2:after {
			content: '';
			position: absolute;
			bottom: -10px;
			left: 50%;
			transform: translateX(-50%);
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

	.learning-section p {
		max-width: 800px;
		margin: 0 auto 40px;
		color: var(--light-text);
	}

/* 章节卡片布局 | Chapter cards for learning section */
.chapters-container {
	display: flex;
	justify-content: space-around;
	flex-wrap: wrap;
}

.chapter-card {
	width: calc(33.33% - 30px);
	min-width: 250px;
	margin: 15px;
	padding: 20px;
	background-color: white;
	box-shadow: 0 3px 10px rgba(0,0,0,0.05);
	border-radius: 3px;
	transition: transform 0.3s;
	border: 1px solid var(--border-color);
}

	.chapter-card:hover {
		transform: translateY(-5px);
	}

	.chapter-card h3 {
		font-size: 1.2rem;
		margin-bottom: 15px;
		color: var(--primary-color);
	}

	.chapter-card a {
		display: inline-block;
		margin-top: 10px;
		font-weight: 500;
	}

/* =========================================
   联系我们区域 | CONTACT SECTION
   ========================================= */
.contact-section {
	padding: 70px 0;
	background-color: var(--secondary-color);
	text-align: center;
	position: relative;
	color: white;
}

	.contact-section h2 {
		font-size: 1.8rem;
		margin-bottom: 30px;
	}

/* 联系信息布局 | Contact information layout */
.contact-info {
	display: flex;
	justify-content: center;
	flex-wrap: wrap;
	margin-top: 40px;
}

.contact-method {
	margin: 15px 30px;
}

	.contact-method h3 {
		margin-bottom: 10px;
	}

	.contact-method p {
		margin-top: 5px;
		opacity: 0.9;
	}

/* =========================================
   主要内容区域样式 (用于子页面) | MAIN CONTENT SECTIONS (used in subpages)
   ========================================= */
.main-content {
	padding: 60px 0;
}

.content-section {
	margin-bottom: 50px;
}

	.content-section h2 {
		font-size: 1.8rem;
		color: var(--primary-color);
		margin-bottom: 20px;
		position: relative;
		padding-bottom: 10px;
	}

		.content-section h2:after {
			content: '';
			position: absolute;
			bottom: 0;
			left: 0;
			width: 50px;
			height: 3px;
			background-color: var(--accent-color);
		}

	.content-section p {
		margin-bottom: 20px;
	}

/* 图片占位符 | Image placeholders for content */
.image-container {
	margin: 30px 0;
	text-align: center;
}

.image-placeholder {
	background-color: var(--light-bg);
	padding: 100px;
	border-radius: 5px;
	color: #999;
	font-style: italic;
}

/* 内容页的双列布局 | Two-column layout for content pages */
.two-column {
	display: flex;
	flex-wrap: wrap;
	margin: 30px 0;
	gap: 30px;
}

.column {
	flex: 1;
	min-width: 300px;
}

/* 带勾选图标的特点列表 | Feature lists with checkmarks */
.feature-list {
	list-style: none;
}

	.feature-list li {
		margin-bottom: 15px;
		padding-left: 25px;
		position: relative;
	}

		.feature-list li:before {
			content: '✓';
			color: var(--primary-color);
			position: absolute;
			left: 0;
			font-weight: bold;
		}

/* 内容页的 CTA 横幅 | CTA Banner for content pages */
.cta-banner {
	background-color: var(--secondary-color);
	padding: 60px 0;
	text-align: center;
	margin: 50px 0;
	position: relative;
	color: white;
}

	.cta-banner::before {
		content: '';
		position: absolute;
		top: 0;
		left: 0;
		right: 0;
		bottom: 0;
		background: rgba(255,255,255,0.1);
		z-index: 1;
	}

	.cta-banner .container {
		position: relative;
		z-index: 2;
	}

	.cta-banner h2 {
		font-size: 2rem;
		margin-bottom: 20px;
		color: white;
	}

	.cta-banner p {
		max-width: 800px;
		margin: 0 auto 30px;
	}

/* 内容页的表格样式 | Tables for content pages */
.qc-table, .commission-table {
	width: 100%;
	border-collapse: collapse;
	margin: 30px 0;
}

	.qc-table th, .qc-table td, .commission-table th, .commission-table td {
		border: 1px solid #ddd;
		padding: 12px;
		text-align: left;
	}

	.qc-table th, .commission-table th {
		background-color: var(--primary-color);
		color: white;
	}

	.qc-table tr:nth-child(even), .commission-table tr:nth-child(even) {
		background-color: var(--light-bg);
	}

/* 内容页的流程步骤 | Process steps for content pages */
.process-steps {
	margin: 40px 0;
}

.step {
	display: flex;
	margin-bottom: 30px;
	align-items: flex-start;
}

.step-number {
	background-color: var(--primary-color);
	color: white;
	width: 40px;
	height: 40px;
	border-radius: 50%;
	display: flex;
	align-items: center;
	justify-content: center;
	font-weight: bold;
	margin-right: 20px;
	flex-shrink: 0;
}

.step-content {
	flex-grow: 1;
}

	.step-content h3 {
		margin-bottom: 10px;
		color: var(--primary-color);
	}

/* 内容页的客户评价 | Testimonials for content pages */
.testimonial {
	background-color: var(--light-bg);
	padding: 25px;
	border-radius: 5px;
	margin-bottom: 30px;
	box-shadow: 0 3px 10px rgba(0,0,0,0.05);
	position: relative;
}

	.testimonial:before {
		content: '"';
		font-size: 60px;
		position: absolute;
		top: -10px;
		left: 10px;
		color: var(--primary-color);
		opacity: 0.2;
	}

	.testimonial p {
		margin-bottom: 15px;
		font-style: italic;
	}

.testimonial-author {
	text-align: right;
	font-weight: bold;
	color: var(--primary-color);
}

/* =========================================
   优势与服务卡片 | BENEFITS & SERVICES CARDS
   ========================================= */
.benefits-container, .services-container {
	display: flex;
	justify-content: space-around;
	flex-wrap: wrap;
}

.benefit-card {
	width: 30%;
	min-width: 300px;
	margin-bottom: 30px;
	padding: 25px;
	background-color: white;
	box-shadow: 0 3px 10px rgba(0,0,0,0.05);
	border-radius: 5px;
	border: 1px solid var(--border-color);
}

/* =========================================
   页脚 | FOOTER
   ========================================= */
footer {
	background-color: var(--primary-color);
	color: white;
	padding: 50px 0 20px;
}

.footer-content {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
}

.footer-column {
	width: 25%;
	min-width: 250px;
	padding: 0 15px;
	margin-bottom: 30px;
}

	.footer-column h3 {
		font-size: 1.1rem;
		margin-bottom: 20px;
		position: relative;
		padding-bottom: 10px;
		font-weight: 500;
	}

		.footer-column h3:after {
			content: '';
			position: absolute;
			bottom: 0;
			left: 0;
			width: 30px;
			height: 2px;
			background-color: var(--accent-color);
		}

	.footer-column ul {
		list-style: none;
	}

		.footer-column ul li {
			margin-bottom: 10px;
		}

	.footer-column a {
		color: white;
		opacity: 0.7;
		transition: opacity 0.2s;
	}

		.footer-column a:hover {
			opacity: 1;
		}

.footer-bottom {
	text-align: center;
	margin-top: 30px;
	padding-top: 20px;
	border-top: 1px solid rgba(255,255,255,0.1);
	opacity: 0.7;
	font-size: 0.9rem;
}

/* =========================================
   响应式样式 | RESPONSIVE STYLES
   ========================================= */
@media (max-width: 768px) {
	.nav-links {
		display: none;
	}

	.solution-card, .service-card, .chapter-card {
		width: 100%;
		margin-bottom: 20px;
	}

	.hero h1 {
		font-size: 1.8rem;
	}

	.hero p {
		font-size: 1rem;
	}

	.footer-column {
		width: 100%;
	}

	.column {
		width: 100%;
		margin-bottom: 30px;
	}
}