/* ========== 全局样式 ========== */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

:root {
	/* 颜色变量 */
	--primary-color: #22a7a7;
	--text-color: #000000;
	--text-light: #555;
	--text-muted: #888;
	--bg-white: #ffffff;
	--bg-light: #efefef;
	--bg-gray: #f8f9fa;
	--border-color: #f0f0f0;
	--shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
	--shadow-md: 0 2px 10px rgba(0, 0, 0, 0.1);
	--shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);

	/* 间距变量 */
	--spacing-sm: 10px;
	--spacing-md: 20px;
	--spacing-lg: 40px;

	/* 过渡效果 */
	--transition-fast: 0.2s ease;
	--transition-normal: 0.3s ease;
	--transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

	/* 断点 */
	--breakpoint-mobile: 768px;
	--breakpoint-tablet: 1024px;
}

body {
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* ========== 导航栏样式 ========== */
.navbar {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	background-color: var(--bg-white);
	box-shadow: var(--shadow-md);
	z-index: 1000;
	will-change: transform;
}

.nav-container {
	max-width: 1200px;
	margin: 0 auto;
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 15px 30px;
}

/* Logo 区域 */
.logo {
	display: flex;
	align-items: center;
	text-decoration: none;
	color: var(--text-color);
	font-size: 28px;
	font-weight: bold;
}

.logo img {
	height: 40px;
	margin-right: var(--spacing-sm);
}

.logo-text {
	color: var(--primary-color);
}

.logo-text {
	transition: transform 0.3s ease;
}

.logo-text:hover {
	transform: scale(1.1);
}

/* 导航菜单 */
.nav-menu {
	display: flex;
	list-style: none;
	gap: 5px;
	align-items: center;
}

.nav-menu li {
	position: relative;
}

.nav-menu>li>a {
	text-decoration: none;
	color: var(--text-color);
	font-size: 17px;
	font-weight: 600px;
	padding: 10px 18px;
	border-radius: 6px;
	transition: all var(--transition-normal);
	display: block;
	white-space: nowrap;
	cursor: pointer;
}

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

.nav-menu>li>a.active {
	color: var(--primary-color);
}

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

.lan-left {
	left: 5%;
}

.language {
	text-align: right;
}

/* 下拉箭头 */
.dropdown>a::after {
	content: '';
	display: inline-block;
	width: 0;
	height: 0;
	margin-left: 6px;
	vertical-align: middle;
	border-left: 4px solid transparent;
	border-right: 4px solid transparent;
	border-top: 5px solid currentColor;
	transition: transform var(--transition-normal);
}

/* 下拉内容容器 */
.dropdown-content {
	display: none;
	position: absolute;
	top: 100%;
	left: 2%;
	background-color: var(--bg-white);
	min-width: 150px;
	box-shadow: var(--shadow-lg);
	border-radius: 8px;
	margin-top: 0;
	overflow: hidden;
	opacity: 0;
	transform: translateY(-10px);
	transition: all var(--transition-normal);
	z-index: 100;
}


/* PC端：悬停展开下拉菜单 */
@media screen and (min-width: 769px) {
	.dropdown:hover>a::after {
		transform: rotate(180deg);
	}

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

/* 下拉菜单项 */
.dropdown-content a {
	display: block;
	padding: 12px 20px;
	text-decoration: none;
	color: var(--text-color);
	font-size: 15px;
	transition: all var(--transition-fast);
	border-left: 3px solid transparent;
}

.dropdown-content a:hover {
	background-color: #f0f0f0;
	color: #2db7a8;
	border-left-color: #2db7a8;
	padding-left: 25px;
	font-weight: bold;
}

/* 下拉菜单分隔线 */
.dropdown-content a:not(:last-child) {
	border-bottom: 1px solid var(--border-color);
}

/* 汉堡菜单按钮 */
.hamburger {
	display: none;
	flex-direction: column;
	cursor: pointer;
	padding: 5px;
	z-index: 1001;
}

.hamburger span {
	width: 25px;
	height: 3px;
	background-color: #333;
	margin: 3px 0;
	transition: all 0.3s ease;
	border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
	transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
	opacity: 0;
}

.hamburger.active span:nth-child(3) {
	transform: rotate(-45deg) translate(7px, -7px);
}

.dropdown-content-active {
	color: #2db7a8 !important;
	background-color: #f0f0f0;
	font-weight: bold;
}

/* 移动端菜单遮罩层 */
.mobile-menu-overlay {
	display: none;
	position: fixed;
	top: 70px;
	left: 0;
	width: 100%;
	height: calc(100vh - 70px);
	background-color: rgba(0, 0, 0, 0.5);
	z-index: 998;
	opacity: 0;
	transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
	display: block;
	opacity: 1;
}

/* 按钮 */
.btn {
	padding: 5px 20px;
	color: #818181;
	text-decoration: none;
	border-radius: 50px;
	font-size: 15px;
	font-weight: 500;
	transition: all 0.3s ease;
	display: inline-block;
}

.btn:hover {
	color: #23acac;
	transform: translateY(-3px);
}

/* 按钮 */
.btn-display {
	padding: 5px 20px;
	color: #818181;
	text-decoration: none;
	border-radius: 50px;
	font-size: 13px;
	font-weight: 500;
	transition: all 0.3s ease;
	display: inline-block;
}

.btn-display:hover {
	color: #23acac;
	transform: translateY(-3px);
}

.btn-center-self {
	display: block;
	margin-left: auto;
	margin-right: auto;
	text-align: center;
	/* 如果需要文本也居中 */
}

/* 标题样式 */
.title {
	font-size: 55px;
	font-weight: bold;
	color: #ffffff;
	margin-bottom: 20px;
	text-align: right;
}
.model-number {
	/* 	color: #fff;
	background: #2db5a3; */
	color: #2db5a3;
	padding: 5px 0px;
	display: inline-block;
	border-radius: 8px;
	margin-left: 0px;
}
.description {
	text-align: center;
	font-size: 16px;
	color: #ffffff;
	margin-left: 70%;
	line-height: 1.75;
}

.description-about {
	color: #000000;
	font-size: 1rem;
	line-height: 1.75;
	width: 85%;
	margin-left: auto;
	margin-right: auto;
}

.title-left {
	font-size: 55px;
	font-weight: bold;
	color: #ffffff;
	margin-bottom: 20px;
	text-align: left;
}

.description-left {
	text-align: center;
	font-size: 16px;
	color: #ffffff;
	max-width: 30%;
	line-height: 1.75;
}

/* 图片容器样式 */
.image-container {
	width: 100%;
	align-items: center;
	min-height: 0vh;
	overflow: hidden;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 图片背景banner */
.image-banner {
	width: 100%;
	height: 700px;
	margin: 0;
	padding: 0;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	display: flex;
	align-items: center;
	position: relative;
}

.banner-title {
	font-size: 32px;
	font-weight: bold;
	color: #333;
	margin: 0;
	padding-left: 100px;
	z-index: 2;
	position: relative;
}

/* 移动端和手机端适配 */
@media screen and (max-width: 768px) {
	.title {
		text-align: center;
	}

	.image-banner {
		height: 30vh;
		justify-content: center;
	}

	.banner-title {
		font-size: 24px;
		padding-left: 0;
		text-align: center;
	}

	.language {
		border-top: 2px solid #000;
		text-align: left;
	}

	.lan-left {
		left: 0%;
	}
}

/* ========== 平板端适配 (768px - 1024px) ========== */
@media screen and (max-width: 1024px) {
	.nav-container {
		padding: 15px 20px;
	}

	.nav-menu {
		gap: 2px;
	}

	.nav-menu>li>a {
		font-size: 15px;
		padding: 8px 14px;
	}

	.dropdown-content {
		min-width: 130px;
	}

	.dropdown-content a {
		font-size: 14px;
		padding: 10px 16px;
	}
}

/* ========== 移动端适配 (< 768px) ========== */
@media screen and (max-width: 768px) {
	.hamburger {
		display: flex;
	}

	.nav-menu {
		position: fixed;
		top: 0;
		right: -100%;
		width: 280px;
		height: 100vh;
		background-color: #ffffff;
		flex-direction: column;
		padding: 80px 0 20px;
		gap: 0;
		transition: right 0.3s ease;
		box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
		overflow-y: auto;
		z-index: 999;
	}

	.nav-menu.active {
		right: 0;
	}

	.nav-menu li {
		width: 100%;
	}

	.nav-menu>li>a {
		width: 100%;
		padding: 16px 20px;
		border-radius: 0;
		border-bottom: 1px solid #f0f0f0;
	}

	/* 移动端下拉箭头 */
	.dropdown>a::after {
		float: right;
		margin-top: 2px;
	}

	/* 移动端：点击后箭头旋转 */
	.dropdown.active>a::after {
		transform: rotate(180deg);
	}

	/* 移动端下拉菜单 */
	.dropdown-content {
		position: static;
		display: none;
		box-shadow: none;
		background-color: #f8f9fa;
		margin-top: 0;
		border-radius: 0;
		opacity: 1;
		transform: none;
	}

	/* 移动端：点击展开 */
	.dropdown.active .dropdown-content {
		display: block;
	}

	.dropdown-content a {
		padding: 12px 20px 12px 40px;
		font-size: 14px;
		border-left: none;
	}

	.dropdown-content a:hover {
		padding-left: 45px;
		background-color: #e9ecef;
	}

	/* 移动端active状态 */
	.nav-menu>li>a.active {
		background-color: #e7f3ff;
		border-left: 4px solid #007bff;
	}

	.description-about {
		text-align: center;
	}
}

/* ========== 页面内容区域 ========== */
.content,
.content-left {
	margin-top: 30px;
	padding: 40px 20px;
	max-width: 1200px;
	margin-left: auto;
	margin-right: auto;
}

.content h1 {
	margin-bottom: 20px;
}

.content p {
	line-height: 1.8;
	font-size: 19px;
	margin-bottom: 15px;
}

.section {
	margin-bottom: 60px;
	padding: 40px;
	background-color: #f9f9f9;
	border-radius: 8px;
}

.section h2 {
	color: #333;
	margin-bottom: 20px;
	padding-bottom: 10px;
	border-bottom: 2px solid #007bff;
}

/* 提示信息样式 */
.info-box {
	background-color: #e7f3ff;
	border-left: 4px solid #007bff;
	padding: 15px 20px;
	margin: 20px 0;
	border-radius: 4px;
}

.info-box strong {
	color: #007bff;
}

/* ========== 轮播图样式 ========== */
.carousel-container {
	position: relative;
	width: 100%;
	height: 840px;
	margin: 72px 0 0 0;
	overflow: hidden;
	z-index: 1;
}

/* 轮播内容容器 */
.carousel-content {
	display: flex;
	width: 100%;
	height: 100%;
	transition: transform 0.5s ease;
	/* 轮播过渡动画 */
}

.carousel-item {
	min-width: 100%;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
	position: relative;
	overflow: hidden;
	padding-right: 630px;
}

.carousel-item img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	position: absolute;
	top: 0;
	left: 0;
	z-index: 1;
}

/* 轮播遮罩层 */
.carousel-overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 0.15);
	z-index: 2;
}

/* 轮播内容容器 */
.carousel-content-wrapper {
	position: relative;
	z-index: 3;
	text-align: center;
	color: #fff;
	max-width: 800px;
	padding: 0 20px;
	opacity: 0;
	transform: translateY(30px);
}

/* 激活状态的内容动画 */
.carousel-item.active .carousel-content-wrapper {
	animation: carouselFadeIn 1s ease-out 0.3s forwards;
}

/* 轮播标题 */
.carousel-title {
	font-size: 55px;
	font-weight: bold;
	color: #000000;
	margin-bottom: 20px;
	line-height: 1.2;
}

/* 轮播副标题 */
.carousel-subtitle {
	font-size: 30px;
	line-height: 1.8;
	margin-bottom: 30px;
	opacity: 0.95;
	color: #000000;
}

/* 轮播按钮 */
.carousel-btn-link {
	display: inline-block;
	padding: 14px 32px;
	background-color: #00b398;
	color: #fff;
	text-decoration: none;
	border-radius: 4px;
	font-size: 16px;
	font-weight: 500;
	cursor: pointer;
	transition: all 0.3s ease;
	box-shadow: 0 4px 12px rgba(0, 200, 170, 0.3);
}

.carousel-btn-link:hover {
	background-color: #00b398;
	transform: translateY(-2px);
	box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
}

/* 内容淡入动画 */
@keyframes carouselFadeIn {
	0% {
		opacity: 0;
		transform: translateY(30px);
	}

	100% {
		opacity: 1;
		transform: translateY(0);
	}
}

/* 轮播控制按钮 */
.carousel-btn {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	width: 40px;
	height: 80px;
	background-color: #cfcfcf00;
	border: 1px solid #cfcfcf00;
	cursor: pointer;
	color: rgba(255, 255, 255, 0.0);
	display: flex;
	font-size: 27px;
	align-items: center;
	justify-content: center;
	transition: all 0.3s ease;
	z-index: 10;
}

.carousel-btn:hover {
	background-color: #bbbbbba0;
	transform: translateY(-50%) scale(1.05);
}

.carousel-btn span {
	color: white;
	font-size: 28px;
	font-weight: bold;
}

/* 轮播指示器 */
.carousel-indicators {
	position: absolute;
	bottom: 20px;
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	gap: 10px;
	z-index: 10;
}

.indicator-dot {
	width: 13px;
	height: 13px;
	border-radius: 50%;
	background-color: rgba(255, 255, 255, 0.5);
	border: 2px solid rgba(255, 255, 255, 0.8);
	cursor: pointer;
	transition: all 0.3s ease;
}

.indicator-dot.active {
	background-color: white;
	width: 13px;
	height: 13px;
}

.prev-btn {
	left: 0px;
	border-top-right-radius: 5px;
	border-bottom-right-radius: 5px;
}

.next-btn {
	right: 0px;
	border-top-left-radius: 5px;
	border-bottom-left-radius: 5px;
}

/* ========== 移动端轮播适配 ========== */
@media screen and (max-width: 768px) {
	.carousel-container {
		margin-top: 70px;
		height: 400px;
	}

	.carousel-item {
		width: 100%;
		padding-right: 0;
	}

	.carousel-btn {
		width: 20px;
		height: 60px;
		font-size: 20px;
	}

	.prev-btn {
		left: 0;
	}

	.next-btn {
		right: 0;
	}

	.carousel-title {
		font-size: 28px;
		margin-bottom: 12px;
	}

	.carousel-subtitle {
		font-size: 16px;
		margin-bottom: 20px;
	}

	.carousel-btn-link {
		padding: 10px 24px;
		font-size: 14px;
	}

	.carousel-content-wrapper {
		padding: 0 15px;
		text-align: center;
		max-width: 90%;
	}

	.description {
		text-align: center;
		margin-left: 0%;
	}
}

/* ========== 移动端轮播适配 ========== */
@media screen and (max-width: 968px) {
	.carousel-item {
		width: 100%;
		padding-right: 0;
	}

	.footer-main {
		flex-direction: column;
		gap: 30px;
		align-items: center;
		text-align: center;
		order: 2;
	}

	/* 右侧二维码区 */
	.footer-qrcode {
		display: flex;
		justify-content: space-between;
		gap: 30px;
		/* 两个二维码间距 */
	}
}


/* 设备展示容器 - 网格布局 */
.device-container {
	display: flex;
	flex-wrap: wrap;
	gap: 15px 15px;
	margin: 0 auto;
	padding-top: 15px;
	padding-left: 15px;
	padding-right: 15px;
}

/* 单个设备卡片样式 */
.device-card {
	flex: 1 1 calc(50% - 30px);
	min-width: 300px;
	border-radius: 8px;
	text-align: center;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
	position: relative;
	overflow: hidden;
	cursor: pointer;
	min-height: 650px;
	background-size: cover;
	transition: box-shadow 0.3s ease, transform 0.3s ease;
}

/* 单个设备卡片样式 */
.device-card-P6 {
	min-height: 800px;
}

/* 背景图片层 - 始终显示，清晰度 100% */
.device-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 0;
	background-image: inherit;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	opacity: 1;
	/* 完全显示 */
	transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	backface-visibility: hidden;
	transform: translateZ(0);
}

/* 悬停时放大背景 */
.device-card:hover::before {
	transform: scale(1.1);
}

/* 悬停时卡片轻微上移 */
.device-card:hover {
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
	transform: translateY(-4px);
}

/* 内容层 */
.device-card>* {
	position: relative;
	z-index: 1;
}

/* 隐藏图标 */
.device-icon {
	display: none;
}

/* 设备名称 */
.device-name {
	font-size: 28px;
	font-weight: 700;
	color: #000000;
	text-align: center;
	margin-top: 50px;
	margin-bottom: 15px;
	transition: all 0.3s ease;
}

.device-card:hover .device-name,
.device-card:hover .device-desc {
	transform: translateY(-8px);
}

/* 设备描述 */
.device-desc {
	font-size: 15px;
	color: #000000;
	text-align: center;
	line-height: 1.5;
	margin-bottom: 10px;
	transition: all 0.3s ease;
}


/* 标题区域 */
.title-section {
	position: relative;
	z-index: 10;
	text-align: center;
	max-width: 1200px;
	margin-top: 70px;
}

.main-title {
	font-size: 65px;
	font-weight: 700;
	color: #d0d0d0;
	letter-spacing: 8px;
	margin-bottom: 20px;
	line-height: 1.2;
}

/* 响应式 */
@media screen and (max-width: 968px) {
	.device-card {
		flex: 1 1 100%;
		min-height: 350px;
	}

	.device-card-P6 {
		min-height: 350px;
	}

	.device-name {
		font-size: 24px;
		color: #33a598;
	}

	.device-desc {
		font-size: 14px;
		color: #2c2c2c;
	}

	/* hero-section 移动端样式 */
	.hero-section {
		height: auto;
		min-height: 500px;
		width: 100%;
		background: #000000;
		justify-content: space-between;
	}

	.video-background {
		position: absolute;
		top: auto;
		bottom: 0;
	}

	.title-section {
		margin-top: 20px;
		margin-bottom: auto;
	}

	.main-title {
		font-size: 36px;
		letter-spacing: 4px;
		margin-bottom: 20px;
	}

	.description {
		font-size: 14px;
	}
}

/* 背景视频容器 */
.video-background {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	aspect-ratio: 16/9;
	z-index: 1;
	overflow: hidden;
}

.video-background video {
	position: absolute;
	top: 50%;
	left: 50%;
	min-width: 100%;
	min-height: 100%;
	width: auto;
	height: auto;
	transform: translate(-50%, -50%);
	object-fit: cover;
}

/* 视频遮罩层（提高文字可读性） */
.video-overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(0, 0, 0, 0.1);
	/* 半透明黑色遮罩 */
	backdrop-filter: blur(2px);
	/* 轻微模糊效果 */
}

/* 主容器 */
.hero-section {
	position: relative;
	width: 100%;
	min-height: 500px;
	display: flex;
	flex-direction: column;
	justify-content: flex-start;
	align-items: center;
	background: #000000;
	overflow: hidden;
}


/* 页脚样式 */
.footer {
	background-color: #2b2b2b;
	color: #b0b0b0;
	padding: 40px 20px;
	margin-top: 20px;
}

.footer-container {
	width: 80%;
	max-width: 1200px;
	margin: 0px auto;
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 60px 5px;
	gap: 40px;
}

/* 左侧二维码区域 */
.footer-left {
	display: flex;
	align-items: center;
	gap: 20px;
}

.qr-logo {
	width: 250px;
	height: 80px;
	background: #2b2b2b;
	padding: 8px;
	border-radius: 4px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.qr-logo img {
	width: 100%;
	height: 100%;
	object-fit: contain;
}

.qr-code {
	width: 120px;
	height: 120px;
	background: #ffffff;
	padding: 8px;
	border-radius: 4px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.qr-code img {
	width: 100%;
	height: 100%;
	display: block;
}

/* 中间联系信息区域 */
.footer-center {
	flex: 1;
}

.contact-info {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.contact-item {
	display: flex;
	align-items: flex-start;
	gap: 10px;
	font-size: 14px;
	line-height: 1.6;
}

.contact-item .icon {
	width: 18px;
	height: 18px;
	flex-shrink: 0;
	margin-top: 2px;
}

.contact-item .icon svg {
	width: 100%;
	height: 100%;
	fill: #b0b0b0;
}

.contact-item .text {
	color: #b0b0b0;
}

/* 右侧公司信息区域 */
.footer-right {
	flex-shrink: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	/* 水平居中 */
	gap: 10px;
	/* 二维码与文字间隔 10px */
}

.company-info {
	text-align: center;
	/* 文字居中 */
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.company-name {
	color: #b0b0b0;
	font-weight: 500;
}

.company-details {
	color: #888;
	font-size: 13px;
}

/* 响应式设计 */
@media screen and (max-width: 968px) {
	.footer-container {
		flex-direction: column;
		align-items: center;
		gap: 30px;
		margin-left: 20px;
		text-align: center;
	}

	.footer-right {
		padding: 20px;
		text-align: left;
		order: 3;
	}

	.company-info {
		padding-top: 20px;
	}

	.contact-item .icon {
		width: 32px;
	}
}

@media screen and (max-width: 640px) {
	.footer {
		padding: 30px 15px;
	}

	.footer-left {
		flex-direction: column;
		align-items: flex-start;
	}

	.qr-code {
		width: 100px;
		height: 100px;
	}

	.contact-item {
		font-size: 13px;
	}

	.company-info {
		font-size: 13px;
	}
}


/* ========== 返回顶部按钮 ========== */
:root {
	--btn-size-desktop: 48px;
	--btn-size-tablet: 44px;
	--btn-size-mobile: 40px;
	--btn-bg: rgba(0, 0, 0, 0.65);
	--btn-bg-hover: rgba(0, 0, 0, 0.85);
}

.back-to-top {
	position: fixed;
	right: 24px;
	bottom: 24px;
	width: var(--btn-size-desktop);
	height: var(--btn-size-desktop);
	border-radius: 50%;
	background: #2db7a8;
	color: #fff;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	font-size: 14px;
	font-weight: 500;
	z-index: 9999;
	opacity: 0;
	visibility: hidden;
	transform: translateY(20px);
	transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}

.back-to-top.show {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

@media (hover: hover) {
	.back-to-top:hover {
		background: #2da196;
	}
}

@media (max-width: 768px) {
	.back-to-top {
		width: var(--btn-size-tablet);
		height: var(--btn-size-tablet);
		right: 16px;
		bottom: 16px;
		font-size: 12px;
	}
}

@media (max-width: 375px) {
	.back-to-top {
		width: var(--btn-size-mobile);
		height: var(--btn-size-mobile);
		font-size: 11px;
	}
}

@media screen and (min-width: 2560px) {
	.nav-container {
		max-width: 50%;
	}

	.nav-menu>li>a {
		font-size: 20px;
		font-weight: 500;
		padding: 13px 20px;
	}

	.dropdown-content a {
		padding: 14px 20px;
		font-size: 18px;
	}

	.carousel-container {
		position: relative;
		width: 100%;
		height: 1080px;
		margin: 72px 0 0 0;
		overflow: hidden;
		z-index: 1;
	}

	.title-section {
		position: relative;
		z-index: 10;
		text-align: center;
		max-width: 2200px;
		margin-top: 70px;
	}

	.device-card {
		min-width: 300px;
		min-height: 820px;
		padding: 55px 20px;
	}

	.device-card-P6 {
		min-height: 1080px;
	}

	/* 轮播标题 */
	.carousel-title {
		font-size: 55px;
		font-weight: 500;
		color: #000000;
		margin-bottom: 20px;
		line-height: 1.2;
	}

	/* 轮播副标题 */
	.carousel-subtitle {
		font-size: 28px;
		line-height: 1.5;
		margin-bottom: 30px;
		opacity: 0.95;
		color: #000000;
	}

	/* 设备名称 */
	.device-name {
		font-size: 32px;
		font-weight: 700;
		margin-top: 40px;
	}

	/* 设备描述 */
	.device-desc {
		font-size: 18px;
	}

	/* 按钮 */
	.btn {
		font-size: 15px;
	}

	.footer-container {
		max-width: 50%;
	}
}



/* 主体信息区（文字+二维码） */
.footer-main {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
}

/* 左侧文字信息 */
.footer-info {
	display: flex;
	flex-direction: column;
	gap: 5px;
	/* 行间距匹配原图 */
}

.company-name {
	font-size: 20px;
	font-weight: 500;
	margin-bottom: 5px;
}

.info-item {
	display: flex;
	align-items: center;
	gap: 12px;

	/* 图标与文字间距 */
}

/* 图标样式（模拟原图小图标） */
.info-item::before {
	content: "";
	display: inline-block;
	width: 18px;
	height: 18px;
	background-size: contain;
	background-repeat: no-repeat;
	background-position: center;
}

/* 电话图标 */
.tel::before {
	background-image: url("data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M20.01 15.38c-1.23 0-2.42-.2-3.53-.56-.35-.12-.74-.03-1.01.24l-1.57 1.97c-2.83-1.35-5.48-3.9-6.89-6.83l1.95-1.66c.27-.28.35-.67.24-1.02-.37-1.11-.56-2.3-.56-3.53 0-.54-.45-.99-.99-.99H4.19C3.65 3 3 3.24 3 3.99 3 13.28 10.73 21 20.01 21c.71 0 .99-.63.99-1.18v-3.45c0-.54-.45-.99-.99-.99z'/%3E%3C/svg%3E");
}

/* 邮箱图标 */
.email::before {
	background-image: url("data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm0 4l-8 5-8-5V6l8 5 8-5v2z'/%3E%3C/svg%3E");
}

/* 研发中心图标 */
.research::before {
	background-image: url("data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M12 2C8.13 2 5 5.13 5 9c0 5.25 7 13 7 13s7-7.75 7-13c0-3.87-3.13-7-7-7zm0 9.5c-1.38 0-2.5-1.12-2.5-2.5s1.12-2.5 2.5-2.5 2.5 1.12 2.5 2.5-1.12 2.5-2.5 2.5z'/%3E%3C/svg%3E");
}

/* 运营总部图标 */
.office::before {
	background-image: url("data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M12 7V3H2v18h20V7H12zM6 19H4v-2h2v2zm0-4H4v-2h2v2zm0-4H4V9h2v2zm0-4H4V5h2v2zm4 12H8v-2h2v2zm0-4H8v-2h2v2zm0-4H8V9h2v2zm0-4H8V5h2v2zm10 12h-8v-2h2v-2h-2v-2h2v-2h-2V9h8v10zm-2-8h-2v2h2v-2zm0 4h-2v2h2v-2z'/%3E%3C/svg%3E");
}

/* 右侧二维码区 */
.footer-qrcode {
	display: flex;
	justify-content: space-between;
	gap: 30px;
	/* 两个二维码间距 */
}

.qrcode-item {
	display: flex;
	flex-direction: column;
	align-items: center;
	width: clamp(100px, 10vw, 150px);
}

/* 二维码图片 */
.qrcode-img {
	width: clamp(100px, 10vw, 130px);
	height: clamp(100px, 10vw, 130px);
	background-color: #fff;
	/* 模拟二维码样式（可替换为实际二维码图片） */
	background-size: cover;
}

/* 二维码下方浅蓝色标签 */
.qrcode-label {
	width: clamp(100px, 10vw, 130px);
	height: 18px;
	line-height: 18px;
	text-align: center;
	background-color: #2db7a8;
	/* 匹配原图浅蓝色 */
	color: #fff;
	font-size: 11px;
}

/* 底部版权信息 */
.footer-copyright {
	width: 100%;
	text-align: center;
	color: #b8b8b8;
	/* 版权文字浅灰色 */
	font-size: 14px;
	line-height: 28px;
	justify-content: center;
	background-color: #323232;
}

/* 移动端适配（保证小屏幕下排版不乱） */
@media (max-width: 768px) {
	.footer-main {
		flex-direction: column;
		gap: 30px;
		align-items: center;
		text-align: center;
		order: 2;
	}

	.info-item {
		justify-content: flex-start;
		text-align: left;
	}

	.footer-info {
		display: flex;
		flex-direction: column;
		gap: 8px;
		/* 行间距匹配原图 */
	}
}

/* 页脚样式 */
.footer {
	background-color: #1d1b1c;
	color: #b0b0b0;
	padding: 20px 0px 0px 0px;
	margin-top: 20px;
}

.contact-info {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.contact-item {
	display: flex;
	align-items: flex-start;
	gap: 10px;
	font-size: 14px;
	line-height: 1.6;
}

.contact-item .icon {
	width: 18px;
	height: 18px;
	flex-shrink: 0;
	margin-top: 2px;
}

.contact-item .icon svg {
	width: 100%;
	height: 100%;
	fill: #c8c8c8;
}

.contact-item .text {
	color: #c8c8c8;
	;
	text-align: left;
}

/* 右侧公司信息区域 */
.footer-right {
	flex-shrink: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	/* 水平居中 */
	gap: 10px;
	/* 二维码与文字间隔 10px */
}

.company-info {
	text-align: center;
	/* 文字居中 */
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.company-name {
	color: #b0b0b0;
	font-weight: 500;
}

.company-details {
	color: #c8c8c8;
	font-size: 13px;
}