:root {
	--primary-blue: #1e88e5;
	--accent-red: #e53935;
	--text-dark: #333;
	--light-gray: #f5f5f5;
	--white: #ffffff;
	--dark-blue: #0d47a1;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: "Microsoft YaHei", Arial, sans-serif;
}

body {
	color: var(--text-dark);
	line-height: 1.6;
	background-color: #f9f9f9;
}

.container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 2rem;
}

.page-header h1 {
    color: var(--white); 
}
		
/* 基础 banner 容器样式 */
.page-header {
	color: white;
	padding: 0; 
	text-align: center;
	margin-bottom: 2rem;
	border-radius: 0 0 10px 10px;
	box-shadow: 0 4px 12px rgba(0,0,0,0.1);
	position: relative;
	overflow: hidden;
}

/* 多语言图片容器 */
.banner-img-container {
	display: none; /* 默认隐藏所有语言的图片 */
	width: 100%;
	height: 200px; /* 固定 banner 高度，按需调整 */
}
/* 中文显示中文图片，英文显示英文图片 */
.lang-zh .banner-img-container[data-lang="zh"] {
	display: block;
}
.lang-en .banner-img-container[data-lang="en"] {
	display: block;
}

/* banner 图片样式*/
.banner-img-container img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

/* 语言切换样式 */
body:not(.lang-en) [data-lang="en"],
body.lang-en [data-lang="zh"] {
	display: none;
}

/* 语言切换按钮 - 右上角 */
.lang-switcher {
	position: fixed;
	top: 20px;
	right: 20px;
	z-index: 1000;
	display: flex;
	background: white;
	border-radius: 30px;
	box-shadow: 0 4px 12px rgba(0,0,0,0.15);
	overflow: hidden;
}

.lang-btn {
	padding: 8px 16px;
	background: transparent;
	border: none;
	cursor: pointer;
	font-weight: 500;
	transition: all 0.3s;
}

.lang-btn.active {
	background: var(--primary-blue);
	color: white;
}
 
/* 顶部信息栏 */
.top-bar {
	background-color: var(--primary-blue);
	color: white;
	padding: 0.5rem 0;
	font-size: 0.9rem;
	position: relative;
}

.top-bar-content {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 2rem;
	display: flex;
	justify-content: space-between;
}

.contact-info span {
	margin-right: 1.5rem;
}
/* 导航栏样式 */
header {
	background-color: white;
	padding: 0;
	position: sticky;
	top: 0;
	z-index: 1000;
	box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
	display: flex;
	justify-content: space-between;
	align-items: center;
	max-width: 1200px;
	margin: 0 auto;
	padding: 1rem 2rem;
}

.logo-container {
	display: flex;
	align-items: left;
}

.logo-img {
	height: 50px;
	margin-right: 10px;
	padding: 5px;
	border-radius: 5px;
}

/* 添加logo图片尺寸限制 */
.logo-img img {
	max-height: 100%; /* 限制图片最大高度为父容器高度 */
	width: auto; /* 保持宽高比 */
	max-width: 290px; /* 可选：限制最大宽度 */
}
.nav-links {
	display: flex;
	list-style: none;
}

.nav-links > li {
	position: relative;
	margin-left: 1.5rem;
}

.nav-links > li > a {
	color: var(--text-dark);
	text-decoration: none;
	font-size: 1rem;
	font-weight: 500;
	padding: 0.5rem 1rem;
	display: block;
	transition: color 0.3s;
}

.nav-links > li > a:hover {
	color: var(--primary-blue);
}

/* 下拉菜单样式 */
.dropdown {
	position: relative;
}

.dropdown-menu {
	position: absolute;
	top: 100%;
	left: 0;
	background-color: white;
	min-width: 220px;
	box-shadow: 0 8px 16px rgba(0,0,0,0.1);
	border-radius: 4px;
	padding: 0.5rem 0;
	z-index: 1001;
	display: none;
	opacity: 0;
	transform: translateY(10px);
	transition: all 0.3s ease;
}

.dropdown:hover .dropdown-menu {
	display: block;
	opacity: 1;
	transform: translateY(0);
}

.dropdown-menu li {
	list-style: none;
	position: relative;
}

.dropdown-menu a {
	display: block;
	padding: 0.75rem 1.5rem;
	color: var(--text-dark);
	text-decoration: none;
	transition: all 0.3s;
	font-size: 0.95rem;
}

.dropdown-menu a:hover {
	background-color: var(--light-gray);
	color: var(--primary-blue);
	padding-left: 1.75rem;
}

/* 三级菜单样式 */
.sub-dropdown-menu {
	position: absolute;
	top: 0;
	left: 100%;
	background-color: white;
	min-width: 220px;
	box-shadow: 0 8px 16px rgba(0,0,0,0.1);
	border-radius: 4px;
	padding: 0.5rem 0;
	z-index: 1002;
	display: none;
	opacity: 0;
	transform: translateY(10px);
	transition: all 0.3s ease;
}

.dropdown-menu li:hover .sub-dropdown-menu {
	display: block;
	opacity: 1;
	transform: translateY(0);
}

.menu-toggle {
	display: none;
	background: none;
	border: none;
	color: var(--text-dark);
	font-size: 1.5rem;
	cursor: pointer;
}

.page-footer {
	text-align: center;
	padding: 2rem 0;
	margin-top: 3rem;
	border-top: 1px solid #ddd;
	color: #666;
}

.back-link {
	display: inline-block;
	margin-top: 2rem;
	color: var(--primary-blue);
	text-decoration: none;
	font-weight: 500;
	padding: 0.5rem 1rem;
	border: 1px solid var(--primary-blue);
	border-radius: 4px;
	transition: all 0.3s;
}

.back-link:hover {
	background-color: var(--primary-blue);
	color: white;
}