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

        body {
            font-family: 'Segoe UI', 'Poppins', system-ui, -apple-system, 'Roboto', sans-serif;
            background-color: #ffffff;
            color: #1e2a3e;
            line-height: 1.5;
            overflow-x: hidden;
        }

        /* 轮播图区域 */
        .hero-carousel {
            position: relative;
            width: 100%;
            height: 100vh;
            overflow: hidden;
            z-index: 1;
        }

        @media (max-width: 768px) {
            .hero-carousel { 
                height: 28vh; 
                min-height: 220px;
            }
        }

        .carousel-slides {
            position: relative;
            width: 100%;
            height: 100%;
        }

        .slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0;
            transition: opacity 1s ease-in-out;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
        }

        .slide.active { opacity: 1; z-index: 1; }

        .slide-content {
            max-width: 800px;
            padding: 0 24px;
            z-index: 2;
            position: relative;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }

        .slide-content h2 { font-size: 3.5rem; font-weight: 700; margin-bottom: 20px; animation: fadeInUp 0.8s ease; }
        .slide-content p { font-size: 1.2rem; margin-bottom: 30px; animation: fadeInUp 0.8s ease 0.1s both; }
        .slide-content .btn-carousel {
            display: inline-block;
            background: #0f7b9e;
            color: white;
            padding: 14px 36px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: 0.3s;
            animation: fadeInUp 0.8s ease 0.2s both;
        }

        @media (max-width: 768px) {
            .slide-content h2 { font-size: 1rem; margin-bottom: 4px; }
            .slide-content p { font-size: 0.6rem; margin-bottom: 8px; }
            .slide-content .btn-carousel { padding: 5px 12px; font-size: 0.6rem; }
            .slide-content { padding: 0 12px; }
        }

        .carousel-dots {
            position: absolute;
            bottom: 8px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 6px;
            z-index: 10;
        }
        .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: rgba(255,255,255,0.5);
            cursor: pointer;
            transition: 0.3s;
        }
        .dot.active { background: #0f7b9e; width: 14px; border-radius: 20px; }

        .carousel-nav-vertical {
            position: absolute;
            left: 30px;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 15;
        }
        @media (max-width: 768px) {
            .carousel-nav-vertical { display: none; }
        }
        .carousel-nav-vertical .nav-item {
            background: transparent;
            color: white;
            text-decoration: none;
            font-weight: 500;
            transition: 0.2s;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            text-shadow: 0 1px 3px rgba(0,0,0,0.3);
            padding: 8px 12px;
            border-radius: 40px;
        }
        
        .carousel-controls-right {
            position: absolute;
            right: 30px;
            top: 50%;
            transform: translateY(-50%);
            display: flex;
            flex-direction: column;
            gap: 15px;
            z-index: 15;
        }
        @media (max-width: 768px) {
            .carousel-controls-right { display: none; }
        }
        .carousel-arrow-btn {
            background: rgba(0,0,0,0.4);
            backdrop-filter: blur(4px);
            color: white;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: 0.2s;
            font-size: 1.3rem;
        }

        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 顶部导航条 */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: #ffffff;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            z-index: 1000;
            transform: translateY(-100%);
            transition: transform 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            border-bottom: 1px solid #eef2f6;
        }
        .header.visible { transform: translateY(0); }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            max-width: 1280px;
            margin: 0 auto;
            padding: 12px 24px;
        }
        .logo h1 { font-size: 1.4rem; font-weight: 700; color: #0a5c7e; }
        .logo span { font-weight: 400; color: #2c8eb3; font-size: 0.75rem; }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .nav-links {
            display: flex;
            gap: 1.5rem;
            list-style: none;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #1e2f3c;
            transition: 0.2s;
            font-size: 0.95rem;
        }
        .nav-links a:hover { color: #0f7b9e; }

        .nav-item { position: relative; }
        .subnav {
            position: absolute;
            top: 35px;
            left: 0;
            background: white;
            box-shadow: 0 12px 28px rgba(0,0,0,0.1);
            border-radius: 16px;
            padding: 12px 0;
            min-width: 180px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.25s ease;
            z-index: 1001;
            list-style: none;
        }
        .nav-item:hover .subnav {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .subnav li { padding: 8px 20px; }
        .subnav li a {
            color: #2c3e50;
            font-size: 0.9rem;
            display: block;
            white-space: nowrap;
        }

        .lang-switch {
            display: flex;
            gap: 6px;
            background: #f0f2f5;
            padding: 4px 10px;
            border-radius: 40px;
            cursor: pointer;
            font-weight: 500;
            font-size: 0.8rem;
        }
        .lang-switch span {
            cursor: pointer;
            padding: 3px 6px;
            border-radius: 30px;
            transition: 0.2s;
            color: #5c6f87;
        }
        .lang-switch span.active { background: #0f7b9e; color: white; }

        .menu-toggle {
            display: none;
            font-size: 1.6rem;
            cursor: pointer;
            color: #0a5c7e;
        }

        /* 拼接式布局区域 */
        .stack-section { position: relative; z-index: 2; }
        .bg-white { background: #ffffff; }
        .bg-gray { background: #f8fafc; }
        .card-layer {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10;
            transition: opacity 0.6s cubic-bezier(0.2, 0.9, 0.4, 1.1), transform 0.6s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            will-change: opacity, transform;
        }
        @media (max-width: 850px) {
            .card-layer {
                opacity: 1 !important;
                transform: translateY(0) !important;
            }
            .stack-section {
                position: relative;
            }
        }
        @media (min-width: 851px) {
            .card-layer {
                opacity: 0;
                transform: translateY(40px);
            }
            .card-layer.revealed {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .card-content {
            max-width: 1280px;
            margin: 0 auto;
            padding: 80px 28px;
            width: 100%;
        }
        @media (max-width: 850px) { 
            .card-content { 
                padding: 50px 20px; 
            }
        }
        @media (max-width: 480px) { 
            .card-content { 
                padding: 40px 16px; 
            }
        }

        /* 产品拼接式布局样式 */
        .product-dual-row {
            display: flex;
            flex-direction: row;
            align-items: center;
            gap: 0;
            margin-bottom: 0;
            transition: all 0.3s;
        }
        .product-dual-row.reverse {
            flex-direction: row-reverse;
        }
        .dual-image {
            flex: 1;
            padding: 40px;
            text-align: center;
        }
        .dual-image img {
            max-width: 100%;
            height: auto;
            max-height: 240px;
            object-fit: contain;
        }
		.dual-imageTM {
            flex: 1;
            padding: 0;
            text-align: center;
            overflow: hidden;
        }

	.dual-imageTM img {
	  max-width: 100%;
		height: auto;
		  max-height: 300px;
		object-fit: cover;
	  }
			.dual-info {
            flex: 1;
            padding: 40px;
            background: #fafbfc;
        }
        .dual-info h3 {
            font-size: 1.9rem;
            color: #0a5c7e;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .dual-info .feature-list {
            list-style: none;
            margin: 16px 0 24px;
        }
        .dual-info .feature-list li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.98rem;
            color: #2c4b5e;
        }
        .dual-info .feature-list i {
            color: #0f7b9e;
            width: 24px;
            font-size: 1.1rem;
        }
        .view-product-btn {
            display: inline-block;
            background: #0f7b9e;
            color: white;
            text-decoration: none;
            padding: 10px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background 0.3s, transform 0.2s;
            margin-top: 4px;
            border: none;
            cursor: pointer;
        }
        
        @media (max-width: 850px) {
            .product-dual-row, .product-dual-row.reverse {
                flex-direction: column !important;
                gap: 0;
                margin-bottom: 0;
                padding: 0;
            }
            .dual-image {
                width: 100%;
                padding: 30px 20px;
            }
            .dual-image img {
                max-height: 180px;
            }
            .dual-info {
                text-align: center;
                padding: 30px 20px;
                width: 100%;
                background: #fafbfc;
            }
            .dual-info h3 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
        }
        
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #1e2f3c;
            text-align: center;
        }
        .section-sub {
            text-align: center;
            color: #5c6f87;
            max-width: 680px;
            margin: 0 auto 32px;
            font-size: 1rem;
        }

        .about-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            align-items: stretch;
        }
        .about-text { flex: 1.5; padding: 40px; background: #fafbfc; }
        .about-text h2 { font-size: 2rem; margin-bottom: 18px; color: #1e2f3c; }
        .about-text p { margin-bottom: 14px; line-height: 1.6; color: #2c4b5e; font-size: 0.95rem; }
        .honor-list {
            background: #eef4f8;
            padding: 16px 20px;
            margin: 18px 0;
            border-left: 4px solid #0f7b9e;
        }
        .stats {
            display: flex;
            gap: 28px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .stat-number { font-size: 2rem; font-weight: 800; color: #0f7b9e; }
        .about-image {
            flex: 1;
            text-align: center;
            background: linear-gradient(135deg, #0a5c7e, #0f7b9e);
            padding: 40px 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            color: white;
        }
        .about-image h3 { color: white; }
        .about-image p { color: rgba(255,255,255,0.8); }
        .contact-card {
            padding: 60px 32px;
            text-align: center;
            max-width: none;
            margin: 0;
            background: #fafbfc;
        }

        @media (max-width: 850px) {
            .about-wrapper {
                flex-direction: column;
                gap: 0;
            }
            .about-text { padding: 30px 20px; }
            .about-text h2 { font-size: 1.6rem; }
            .about-image { padding: 30px 20px; }
            .contact-card { padding: 40px 20px; }
        }

        .footer {
            background: #0a2c38;
            color: #cddfe6;
            padding: 40px 0 20px;
            position: relative;
            z-index: 5;
            width: 100%;
            clear: both;
        }
        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 28px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
        }
        .footer-col {
            flex: 1;
            min-width: 180px;
        }
        .footer-col h4 {
            color: white;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: #cddfe6;
            text-decoration: none;
            font-size: 0.85rem;
        }
        .footer-bottom {
            text-align: center;
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.75rem;
        }
        .icp-link {
            color: #8a9bb0;
            text-decoration: none;
        }
        .icp-link:hover {
            color: #0f7b9e;
        }
        @media (max-width: 850px) {
            .footer-container {
                flex-direction: column;
                gap: 24px;
                padding: 0 20px;
            }
        }

        /* ========= 手机端导航菜单 - 完美左对齐修复 ========= */
        @media (max-width: 850px) {
            .nav-container { 
                padding: 12px 20px; 
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                background: white;
                margin-top: 12px;
                border-radius: 20px;
                box-shadow: 0 12px 28px rgba(0,0,0,0.12);
                overflow: hidden;
                list-style: none;
                padding: 0;
            }
            .nav-links.active { 
                display: flex; 
            }
            .menu-toggle { 
                display: block; 
            }
            .nav-right { 
                gap: 0.6rem; 
            }
            /* 所有菜单项基础样式 - 确保左对齐 */
            .nav-links li {
                width: 100%;
                margin: 0;
                padding: 0;
                border-bottom: 1px solid #f0f2f6;
            }
            .nav-links li:last-child {
                border-bottom: none;
            }
            /* 一级菜单链接样式 - 严格左对齐，无额外缩进 */
            .nav-links li a {
                display: flex;
                align-items: center;
                justify-content: flex-start;
                padding: 14px 20px;
                font-size: 1rem;
                font-weight: 500;
                color: #1e2f3c;
                width: 100%;
                background: white;
                text-decoration: none;
                gap: 12px;
            }
            .nav-links li a i.fas {
                width: 24px;
                display: inline-flex;
                justify-content: center;
                color: #0f7b9e;
                font-size: 1rem;
            }
            
            /* 产品中心、关于我们这些带子菜单的父级样式 */
            .nav-item {
                position: relative;
                width: 100%;
                margin: 0;
                padding: 0;
            }
            .nav-item > a {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 14px 20px;
                width: 100%;
            }
            /* 父级左侧添加图标（产品中心、关于我们） */
            .nav-item > a .link-text {
                display: inline-flex;
                align-items: center;
                gap: 12px;
            }
            .nav-item > a .link-text:before {
                content: "\f1b3";
                font-family: "Font Awesome 6 Free";
                font-weight: 600;
                width: 24px;
                display: inline-flex;
                justify-content: center;
                color: #0f7b9e;
                font-size: 1rem;
            }
            /* 关于我们父级图标单独指定 */
            #aboutNav > a .link-text:before {
                content: "\f129";
            }
            /* 产品中心箭头右侧保留 */
            .nav-item > a .fa-chevron-down {
                transition: transform 0.2s;
                font-size: 0.8rem;
                color: #8a9bb0;
                margin-left: auto;
            }
            .nav-item.active > a .fa-chevron-down {
                transform: rotate(180deg);
            }
            
            /* 子菜单样式 - 完美左对齐，缩进一级 */
            .subnav {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                padding: 0;
                margin: 0;
                background: #f8fafd;
                border-radius: 0;
                display: none;
                width: 100%;
                border-top: 1px solid #eef2f6;
            }
            .subnav li {
                padding: 0;
                border-bottom: 1px solid #eef2f6;
                background: #f8fafd;
            }
            .subnav li:last-child {
                border-bottom: none;
            }
            .subnav li a {
                padding: 12px 20px 12px 48px !important;
                font-size: 0.9rem;
                color: #2c4b5e;
                background: #f8fafd;
                justify-content: flex-start;
                gap: 12px;
            }
            .subnav li a i {
                width: 22px;
                color: #0f7b9e;
                font-size: 0.9rem;
            }
            .nav-item.active .subnav {
                display: block;
            }
            
            /* 确保所有文字都是左对齐，没有任何居中或右偏 */
            .nav-links li a,
            .nav-item > a,
            .subnav li a {
                text-align: left;
            }
            /* 产品中心、关于我们右侧箭头保持在最右边，但文字部分左对齐不受影响 */
            .nav-item > a {
                justify-content: space-between;
            }
            .nav-item > a .link-text {
                flex: 1;
                text-align: left;
            }
            /* 移除任何可能造成偏移的margin/padding默认值 */
            .nav-links, .nav-links ul {
                margin: 0;
                padding: 0;
            }
        }
        
        /* 极小屏微调 */
        @media (max-width: 480px) {
            .nav-links li a {
                padding: 12px 16px;
            }
            .nav-item > a {
                padding: 12px 16px;
            }
            .subnav li a {
                padding: 10px 16px 10px 44px !important;
            }
        }