:root {
	--gold: #c5a059;
	--dark: #09090a;
	--ease: cubic-bezier(0.23, 1, 0.32, 1);
	--line: rgba(255, 255, 255, 0.08);
	--card-bg: #111112;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	background: var(--dark);
	color: #fff;
	font-family: "Optima", "PingFang SC", sans-serif;
	overflow-x: hidden;
}

/* --- 极致质感导航 --- */
nav {
	position: fixed;
	top: 0;
	width: 100%;
	height: 90px;
	z-index: 1000;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(9, 9, 10, 0.7);
	backdrop-filter: blur(30px);
	border-bottom: 1px solid rgba(255, 255, 255, 0.05);
	box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.nav-inner {
	width: 90%;
	max-width: 1400px;
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.logo {
	text-decoration: none;
	display: flex;
	align-items: center;
	gap: 12px;
}

.logo-mark {
	width: 30px;
	height: 30px;
	border: 1px solid var(--gold);
	transform: rotate(45deg);
	display: flex;
	align-items: center;
	justify-content: center;
}

.logo-mark span {
	transform: rotate(-45deg);
	font-weight: 900;
	color: var(--gold);
	font-size: 0.8rem;
}

.logo-text {
	font-size: 1.2rem;
	font-weight: 900;
	letter-spacing: 3px;
	color: #fff;
	transition: 0.6s;
}

/* 隐藏复选框控制手机端 */
#menu-toggle {
	display: none;
}

/* --- 电脑版菜单（交互重塑） --- */
.menu {
	display: flex;
	gap: 50px;
	list-style: none;
}

.menu li {
	position: relative;
}

.menu a {
	text-decoration: none;
	color: rgba(255, 255, 255, 0.4);
	font-size: 0.8rem;
	letter-spacing: 3px;
	font-weight: 700;
	display: block;
	padding: 10px 0;
	transition: all 0.4s var(--ease);
}

/* 鼠标悬停：文字浮动 + 颜色渐变 */
.menu a:hover {
	color: #fff;
	transform: translateY(-2px);
}

.menu a.active {
	color: var(--gold);
}

/* 鼠标悬停：底部超细进度条线 */
.menu a::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	width: 0;
	height: 1px;
	background: var(--gold);
	transition: width 0.4s var(--ease);
	box-shadow: 0 0 10px rgba(197, 160, 89, 0.5);
}

.menu a:hover::after, .menu a.active::after {
	width: 100%;
}

/* --- 汉堡按钮（响应式） --- */
.burger {
	display: none;
	cursor: pointer;
	z-index: 2100;
	width: 28px;
	height: 16px;
	position: relative;
}

.burger span {
	display: block;
	width: 100%;
	height: 1px;
	background: #fff;
	position: absolute;
	left: 0;
	transition: 0.4s var(--ease);
}

.burger span:nth-child(1) {
	top: 0;
}

.burger span:nth-child(2) {
	top: 50%;
	width: 60%;
	right: 0;
	left: auto;
}

/* 错位美感 */
.burger span:nth-child(3) {
	top: 100%;
}

/* --- 手机端沉浸式菜单（无黑块方案） --- */
@media (max-width: 1024px) {
	nav {
		height: 70px;
	}

	.burger {
		display: flex;
	}

	.menu {
		position: fixed;
		top: 0;
		left: 0;
		width: 100vw;
		height: 100vh;
		background: var(--dark);
		flex-direction: column;
		justify-content: center;
		align-items: center;
		gap: 35px;

		opacity: 0;
		visibility: hidden;
		transform: scale(1.05);
		transition: all 0.5s var(--ease);
		z-index: 2000;
	}

	.menu a {
		font-size: 1.8rem;
		transform: translateY(30px);
		opacity: 0;
	}

	.menu a::after {
		display: none;
	}

	/* 手机端不需要下划线 */
	#menu-toggle:checked ~ .nav-inner .menu {
		opacity: 1;
		visibility: visible;
		transform: scale(1);
	}

	#menu-toggle:checked ~ .nav-inner .menu a {
		opacity: 1;
		transform: translateY(0);
		transition-delay: 0.2s;
	}

	/* 汉堡变叉号 */
	#menu-toggle:checked ~ .nav-inner .burger span:nth-child(1) {
		transform: translateY(8px) rotate(45deg);
	}

	#menu-toggle:checked ~ .nav-inner .burger span:nth-child(2) {
		opacity: 0;
	}

	#menu-toggle:checked ~ .nav-inner .burger span:nth-child(3) {
		transform: translateY(-8px) rotate(-45deg);
		width: 100%;
	}
}

/* --------- 关于我们 --------- */
.main-about {
	width: 90%;
	max-width: 1200px;
	margin: 0 auto;
	padding: 180px 0 100px;
	position: relative;
}

.main-about .bg-watermark {
	position: fixed;
	left: 2%;
	bottom: 10%;
	font-size: 20vw;
	font-weight: 900;
	color: rgba(255, 255, 255, 0.02);
	pointer-events: none;
	z-index: -1;
	line-height: 1;
}

/* 章节通用样式 */
.main-about .section {
	margin-bottom: 150px;
	opacity: 0;
	transform: translateY(30px);
	transition: 1s var(--ease);
}

.main-about .section.show {
	opacity: 1;
	transform: translateY(0);
}

.main-about .section-header {
	margin-bottom: 40px;
}

.main-about .section-header .num {
	color: var(--gold);
	font-size: 0.8rem;
	letter-spacing: 5px;
	font-weight: 800;
	display: block;
	margin-bottom: 10px;
}

.main-about .section-header h2 {
	font-size: 2.5rem;
	font-weight: 900;
	letter-spacing: -1px;
}

.main-about .section-header h2 span {
	display: block;
	font-size: 1rem;
	color: rgba(255, 255, 255, 0.3);
	font-weight: 400;
	letter-spacing: 4px;
	margin-top: 5px;
	text-transform: uppercase;
}

.main-about .content-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 80px;
	align-items: start;
}

.main-about .text-zh {
	font-size: 1.1rem;
	line-height: 2;
	color: rgba(255, 255, 255, 0.8);
	text-align: justify;
}

.main-about .text-en {
	font-size: 0.85rem;
	line-height: 1.8;
	color: rgba(255, 255, 255, 0.3);
	text-align: justify;
	font-family: 'Optima', sans-serif;
	font-style: italic;
}

/* 数据块 */
.main-about .stats-bar {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 30px;
	margin-top: 50px;
	border-top: 1px solid var(--line);
	padding-top: 40px;
}

.main-about .stat-item h3 {
	color: var(--gold);
	font-size: 2rem;
	margin-bottom: 5px;
	font-weight: 200;
}

.main-about .stat-item p {
	font-size: 0.65rem;
	color: rgba(255, 255, 255, 0.4);
	letter-spacing: 2px;
}

/* 认证标签 */
.main-about .cert-tag {
	display: inline-block;
	border: 1px solid var(--gold);
	color: var(--gold);
	padding: 5px 15px;
	font-size: 0.7rem;
	letter-spacing: 2px;
	margin-top: 20px;
	font-weight: 800;
}

@media (max-width: 1024px) {
	.main-about .content-grid {
		grid-template-columns: 1fr;
		gap: 30px;
	}

	.main-about .section-header h2 {
		font-size: 2rem;
	}

	.main-about .stats-bar {
		grid-template-columns: 1fr;
		text-align: center;
	}
}

/* --------- 合作伙伴 --------- */
.main-partner {
	width: 90%;
	max-width: 1200px;
	margin: 0 auto;
	padding: 180px 0 100px;
	position: relative;
}

.main-partner .bg-watermark {
	position: fixed;
	left: 2%;
	top: 20%;
	font-size: 20vw;
	font-weight: 900;
	color: rgba(255, 255, 255, 0.02);
	pointer-events: none;
	z-index: -1;
	line-height: 1;
}

.main-partner .partner-header {
	margin-bottom: 100px;
}

.main-partner .partner-header h1 {
	font-size: 4rem;
	font-weight: 900;
	line-height: 1;
	letter-spacing: -2px;
}

.main-partner .partner-header h1 span {
	display: block;
	color: var(--gold);
	font-size: 1rem;
	font-weight: 200;
	letter-spacing: 8px;
	margin-top: 20px;
	text-transform: uppercase;
}

.main-partner .intro-text {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 60px;
	margin-top: 40px;
	border-left: 1px solid var(--gold);
	padding-left: 30px;
}

.main-partner .intro-text p {
	font-size: 1rem;
	line-height: 1.8;
	color: rgba(255, 255, 255, 0.6);
}

.main-partner .intro-text p.en {
	font-size: 0.8rem;
	color: rgba(255, 255, 255, 0.2);
	font-style: italic;
}

/* --- 品牌矩阵 --- */
.main-partner .partner-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: 1px;
	background: var(--line); /* 利用边框间隙形成分割线 */
	border: 1px solid var(--line);
	margin-top: 80px;
}

.main-partner .brand-card {
	background: var(--dark);
	height: 200px;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	padding: 40px;
	transition: all 0.5s var(--ease);
	position: relative;
	overflow: hidden;
}

.main-partner .brand-card:hover {
	background: rgba(197, 160, 89, 0.05);
}

/* 模拟 Logo 的占位符，保持极简感，也可以换成 <img> */
.main-partner .brand-name {
	font-size: 1.2rem;
	font-weight: 800;
	letter-spacing: 2px;
	color: rgba(255, 255, 255, 0.5);
	transition: 0.4s;
	text-align: center;
}

.main-partner .brand-card:hover .brand-name {
	color: var(--gold);
	transform: scale(1.1);
}

.main-partner .brand-tag {
	position: absolute;
	bottom: 20px;
	font-size: 0.6rem;
	letter-spacing: 2px;
	color: rgba(255, 255, 255, 0.1);
	text-transform: uppercase;
}

@media (max-width: 1024px) {
	.main-partner .partner-header h1 {
		font-size: 2.5rem;
	}

	.main-partner .intro-text {
		grid-template-columns: 1fr;
	}

	.main-partner .partner-grid {
		grid-template-columns: 1fr 1fr;
	}
}

/* --------- 产品展示 --------- */
.product-hero {
	padding: 180px 10% 60px;
	text-align: center;
}

.product-hero .label {
	color: var(--gold);
	font-size: 0.7rem;
	letter-spacing: 6px;
	font-weight: 800;
	display: block;
	margin-bottom: 20px;
}

.product-hero h1 {
	font-size: 4rem;
	font-weight: 900;
	letter-spacing: -2px;
	line-height: 1;
}

.product-hero h1 span {
	display: block;
	font-weight: 100;
	font-size: 0.3em;
	color: rgba(255, 255, 255, 0.2);
	margin-top: 15px;
	letter-spacing: 3px;
	text-transform: uppercase;
}

/* --- 产品网格 --- */
.product-grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 20px;
	width: 90%;
	max-width: 1400px;
	margin: 0 auto 100px;
}

.product-item {
	position: relative;
	background: var(--card-bg);
	border: 1px solid var(--line);
	aspect-ratio: 1 / 1;
	overflow: hidden;
	cursor: pointer;
	transition: all 0.5s var(--ease);
}

.product-item img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.8s var(--ease);
	filter: grayscale(0.2);
}

.product-item:hover {
	border-color: var(--gold);
	transform: translateY(-5px);
}

.product-item:hover img {
	transform: scale(1.1);
	filter: grayscale(0) brightness(1.1);
}

.product-item .item-info {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	padding: 20px;
	background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
	transform: translateY(10px);
	opacity: 0;
	transition: 0.4s var(--ease);
}

.product-item:hover .item-info {
	transform: translateY(0);
	opacity: 1;
}

/* --- SVG 预览引擎 --- */
.viewer-overlay {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: rgba(4, 4, 5, 0.98);
	z-index: 2000;
	display: none;
	justify-content: center;
	align-items: center;
	backdrop-filter: blur(15px);
}

.viewer-container {
	position: relative;
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	cursor: zoom-out;
}

.viewer-container .viewer-img {
	max-width: 85%;
	max-height: 85%;
	box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
	transition: transform 0.2s var(--ease);
	cursor: default;
}

/* SVG 图标通用样式 */
.viewer-container .svg-icon {
	width: 24px;
	height: 24px;
	fill: none;
	stroke: currentColor;
	stroke-width: 1.5;
	stroke-linecap: round;
	stroke-linejoin: round;
}

/* 悬浮工具栏 */
.viewer-container .viewer-toolbar {
	position: fixed;
	bottom: 40px;
	left: 50%;
	transform: translateX(-50%);
	display: flex;
	gap: 30px;
	background: rgba(255, 255, 255, 0.05);
	padding: 15px 30px;
	border-radius: 50px;
	border: 1px solid var(--line);
	backdrop-filter: blur(10px);
	z-index: 2100;
}

.viewer-container .icon-btn {
	color: #fff;
	opacity: 0.5;
	transition: 0.3s;
	cursor: pointer;
	display: flex;
	align-items: center;
}

.viewer-container .icon-btn:hover {
	opacity: 1;
	color: var(--gold);
	transform: translateY(-2px);
}

/* 翻页按钮 */
.viewer-container .nav-arrow {
	position: fixed;
	top: 50%;
	transform: translateY(-50%);
	color: #fff;
	opacity: 0.3;
	transition: 0.3s;
	cursor: pointer;
	z-index: 2100;
	padding: 20px;
}

.viewer-container .nav-arrow:hover {
	opacity: 1;
	color: var(--gold);
}

.viewer-container .arrow-left {
	left: 40px;
}

.viewer-container .arrow-right {
	right: 40px;
}

/* 关闭按钮 */
.viewer-container .close-viewer {
	position: fixed;
	top: 40px;
	right: 40px;
	color: #fff;
	opacity: 0.5;
	cursor: pointer;
	z-index: 2100;
	transition: 0.3s;
}

.viewer-container .close-viewer:hover {
	opacity: 1;
	transform: rotate(90deg);
	color: var(--gold);
}

@media (max-width: 1024px) {
	.product-hero h1 {
		font-size: 2.5rem;
	}

	.product-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.viewer-container .nav-arrow {
		display: none;
	}
}

/* --------- 设备展示 --------- */
.main-equipment {
	max-width: 1400px;
	margin: 0 auto 100px;
	padding: 0 5%;
}

/* 核心设备块 */
.main-equipment .device-row {
	display: flex;
	align-items: center;
	gap: 60px;
	margin-bottom: 100px;
	/* 粘性效果 */
	position: sticky;
	top: 100px;
	background: var(--dark);
	padding: 50px 0;
}

/* 左右交替排版逻辑 */
.main-equipment .device-row:nth-child(even) {
	flex-direction: row-reverse;
}

/* 图片框：这里是统一大小的关键 */
.main-equipment .img-container {
	flex: 1.5;
	position: relative;
	width: 100%;
	/* 强制 16:9 比例，你可以根据图片习惯改为 3:2 */
	aspect-ratio: 16 / 9;
	overflow: hidden;
	border: 1px solid var(--line);
}

.main-equipment .img-container img {
	width: 100%;
	height: 100%;
	/* object-fit: cover 确保图片填满且不拉伸 */
	object-fit: cover;
	object-position: center;
	transition: transform 1s var(--ease);
	display: block;
}

.main-equipment .device-row:hover img {
	transform: scale(1.08);
}

/* 文字说明 */
.main-equipment .content {
	flex: 1;
}

.main-equipment .content .num {
	font-size: 4rem;
	font-weight: 900;
	color: rgba(197, 160, 89, 0.1);
	margin-bottom: -20px;
	font-style: italic;
}

.main-equipment .content h2 {
	font-size: 2rem;
	margin-bottom: 20px;
	color: #fff;
	border-left: 4px solid var(--gold);
	padding-left: 20px;
}

.main-equipment .content p {
	font-size: 1rem;
	color: rgba(255, 255, 255, 0.5);
	line-height: 1.8;
	text-align: justify;
}

/* 移动端适配 */
@media (max-width: 900px) {
	.main-equipment {
		margin-top: 80px;
	}

	.main-equipment .device-row, .main-equipment .device-row:nth-child(even) {
		flex-direction: column;
		position: static;
		gap: 20px;
	}

	.main-equipment .content {
		text-align: center;
	}

	.main-equipment .content h2 {
		border-left: none;
		padding-left: 0;
	}
}

/* --------- 联系我们 --------- */
.main-contact {
	min-height: 85vh;
	display: flex;
	align-items: center;
	padding: 80px 10% 50px;
	position: relative;
	overflow: hidden;
}

/* 背景超大水印 */
.main-contact .bg-watermark {
	position: absolute;
	left: 5%;
	bottom: 10%;
	font-size: 18vw;
	font-weight: 900;
	color: rgba(255, 255, 255, 0.02);
	pointer-events: none;
	line-height: 0.8;
}

.main-contact .content-box {
	position: relative;
	z-index: 10;
	width: 100%;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 100px;
}

.main-contact .title-sec h1 {
	font-size: 5rem;
	font-weight: 200;
	line-height: 1;
	letter-spacing: -3px;
	margin-bottom: 30px;
}

.main-contact .title-sec h1 b {
	display: block;
	font-weight: 900;
	color: var(--primary);
	letter-spacing: 2px;
	font-size: 4rem;
	margin-top: 10px;
}

.main-contact .info-sec {
	display: grid;
	grid-template-columns: 1fr;
	gap: 40px;
	border-left: 1px solid rgba(255, 255, 255, 0.05);
	padding-left: 50px;
}

.main-contact .info-item label {
	display: block;
	font-size: 0.65rem;
	color: var(--primary);
	letter-spacing: 4px;
	margin-bottom: 15px;
	font-weight: 800;
	opacity: 0.6;
}

.main-contact .info-item p, .info-item a {
	font-size: 1.4rem;
	color: #fff;
	text-decoration: none;
	font-weight: 300;
	letter-spacing: 1px;
	transition: 0.4s;
}

.main-contact .info-item a:hover {
	opacity: 0.6;
	padding-left: 10px;
}

/* --- 极简底部 --- */
footer {
	padding: 80px 10% 60px;
	border-top: 1px solid var(--line);
	background: linear-gradient(to bottom, transparent, rgba(197, 160, 89, 0.02));
}

.footer-content {
	display: flex;
	justify-content: space-between;
	align-items: flex-end;
}

.footer-left {
	max-width: 500px;
}

.footer-left h2 {
	font-size: 1.2rem;
	letter-spacing: 10px;
	font-weight: 900;
	margin-bottom: 20px;
	color: rgba(255, 255, 255, 0.2);
}

.footer-left p {
	font-size: 0.85rem;
	color: rgba(255, 255, 255, 0.4);
	line-height: 2;
	letter-spacing: 1px;
}

.footer-right {
	text-align: right;
}

.footer-date {
	font-size: 4rem;
	font-weight: 900;
	color: rgba(255, 255, 255, 0.03);
	line-height: 1.1;
	margin-bottom: 10px;
}

.footer-date span {
	color: var(--gold);
	opacity: 0.8;
	font-size: 1rem;
	letter-spacing: 1px;
	font-weight: 800;
	display: block;
}

@media (max-width: 1024px) {
	/* --- 联系我们 -- */
	.main-contact {
		padding-top: 120px;
	}

	.main-contact .content-box {
		grid-template-columns: 1fr;
		gap: 60px;
	}

	.main-contact .info-sec {
		border-left: none;
		padding-left: 0;
		border-top: 1px solid rgba(255, 255, 255, 0.05);
		padding-top: 40px;
	}

	.main-contact .title-sec h1 {
		font-size: 3.5rem;
	}

	.main-contact .title-sec h1 b {
		font-size: 2.5rem;
	}

	.main-contact .info-item p, .main-contact .info-item a {
		font-size: 1.1rem;
	}

	/* --- 极简底部 --- */
	.footer-content {
		flex-direction: column;
		align-items: center;
		text-align: center;
		gap: 60px;
	}

	.footer-right {
		text-align: center;
	}

	.footer-date {
		font-size: 3rem;
	}
}