/* CSS Reset and Basic Styles */
        :root {
            --primary-color: #5dc2d0; /* 主色 */
            --secondary-color: #004994;
            --background-color: #ffffff;
            --text-color: #333;
            --light-text-color: #ffffff;
            --footer-bg: #1f1f1f;
        }

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

        body {
            font-family: 'Segoe UI', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--background-color);
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        h1, h2, h3 {
            font-weight: 700;
            margin-bottom: 20px;
        }

        p {
            margin-bottom: 1rem;
        }

        a {
            text-decoration: none;
            color: inherit;
        }
        
        img {
            max-width: 100%;
            height: auto;
        }

        /* Header & Navigation */
        .main-header {
            background-color: rgb(92, 193, 207);
            padding: 15px 0;
            position: fixed;
            width: 100%;
            top: 0;
            left: 0;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            transition: background-color 0.3s;
            height: 70px; /* Set a fixed height */
        }

        .main-header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            width: 200px;
        }

        /* Grouping right side controls for better flexbox management */
        .header-controls {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .main-nav {
            display: flex;
            align-items: center;
        }

        .main-nav > ul {
            list-style: none;
            display: flex;
            gap: 25px;
            align-items: center;
        }
        
        .main-nav a {
            color: var(--secondary-color);
            font-weight: 500;
            transition: color 0.3s;
        }

        .main-nav a:hover {
            color: #fff;
        }

        /* Dropdown Menu Styles (Click-based) */
        .dropdown {
            position: relative;
        }

        .dropdown > a {
            cursor: pointer;
            white-space: nowrap; /* Prevent text from wrapping */
        }

        .dropdown > a::after {
            content: ' ▼';
            font-size: 0.7em;
            display: inline-block;
            margin-left: 4px;
        }

        .dropdown-menu {
            display: grid; /* Changed to grid to enforce vertical layout */
            position: absolute;
            top: 100%;
            left: 0;
            background-color: white;
            box-shadow: 0 8px 16px rgba(0,0,0,0.1);
            list-style: none;
            padding: 10px 0;
            margin-top: 15px; /* space between nav and menu */
            min-width: 280px;
            border-radius: 5px;
            z-index: 1001;
            border-top: 3px solid var(--primary-color);
            
            /* Animation properties */
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
        }

        .dropdown.active > .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        /* --- 新增代码：在桌面上悬停时显示语言菜单 --- */
        @media (min-width: 769px) {
            .language-selector:hover > .dropdown-menu {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
        }
        /* --- 新增代码结束 --- */

        .dropdown-menu li a {
            padding: 12px 20px;
            display: block;
            color: var(--secondary-color);
        }

        .dropdown-menu li a:hover {
            background-color: #f9f9f9;
            color: var(--primary-color);
        }
        
        /* SEARCH STYLES - START */
        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .search-input {
            width: 0;
            opacity: 0;
            border: 1px solid #ccc;
            border-radius: 20px;
            padding: 6px 15px;
            transition: all 0.4s ease;
            transform: translateX(10px);
            font-size: 0.9rem;
        }
        
        .search-btn {
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .search-btn svg {
            stroke: #fff;
            transition: stroke 0.3s;
        }
        
        .search-btn:hover svg {
             stroke: var(--secondary-color);
        }

        .header-search.active .search-input {
            width: 200px;
            opacity: 1;
            transform: translateX(0);
        }

        .search-mobile {
            display: none; /* Hidden by default */
        }
        /* SEARCH STYLES - END */


        /* Language Selector */
        .language-selector > a {
            display: flex;
            align-items: center;
        }

        .language-selector > a::after {
            content: ''; /* Hide arrow on desktop */
            display: none;
        }

        .lang-icon {
            width: 24px;
            height: 24px;
            stroke: #fff;
            transition: stroke 0.3s;
        }

        .language-selector > a:hover .lang-icon {
            stroke: var(--secondary-color);
        }
        
        .lang-text {
            display: none; /* Hide text on desktop */
        }

        .dropdown-menu-right {
            left: auto;
            right: 0;
        }


        .btn {
            padding: 10px 20px;
            border-radius: 5px;
            text-transform: uppercase;
            font-weight: 700;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: var(--light-text-color);
        }

        .btn-primary:hover {
            background-color: var(--primary-color);
            color:var(--secondary-color);
        }
        
        .btn-outline {
            background-color: transparent;
            color: var(--light-text-color);
            border: 2px solid var(--light-text-color);
        }

        .btn-outline:hover {
            background-color: var(--light-text-color);
            color: var(--primary-color);
        }

        /* Hamburger Menu for Mobile */
        .hamburger {
            display: none;
            cursor: pointer;
            flex-direction: column;
            gap: 5px;
        }
        .hamburger .bar {
            width: 25px;
            height: 3px;
            background-color: var(--secondary-color);
            border-radius: 2px;
            transition: all 0.3s ease;
        }


        /* Hero Section */
        .hero {
            background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://placehold.co/1920x1080/808080/ffffff?text=Industrial+Background');
            background-size: cover;
            background-position: center;
            height: 60vh;
            display: flex;
            justify-content: center;
            align-items: center;
            text-align: center;
            color: var(--light-text-color);
            padding: 0 20px;
            margin-top: 70px; /* Header height offset */
        }
        .hero-content {
            max-width: 800px;
        }
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
        }

        /* Expert Team Section */
        .expert-section, .contact-section, .locations-section {
            padding: 60px 0;
        }
        .expert-section h2 {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 40px;
        }
        .expert-content {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .expert-text {
            flex: 1;
            min-width: 300px;
        }
        .expert-text p {
            font-size: 1.1rem;
        }
        
        /* Products Section */
        .products-section {
            padding: 37px 0;
            text-align: center;
            background-color: #f9f9f9;
        }
        .products-section h1,
        .products-section h2 {
            font-size: 1.6rem; /* MODIFIED: Font size reduced from 2.2rem */
            margin-bottom: 15px;
            display: inline-block;
            position: relative;
            padding-bottom: 15px;
            font-weight: 600;
            color:var(--secondary-color);
        }
        /* MODIFICATION: Removed general underline from h1/h2 */
        /*
        .products-section h1::after,
        .products-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0; 
            width: 100%; 
            height: 3px;
            background-color: var(--primary-color);
        }
        */
        
        /* MODIFICATION: Added specific underline ONLY for #you-may-like-title */
        #you-may-like-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
        }
        
        /* MODIFICATION: Reduce padding-bottom to bring underline closer */
        #you-may-like-title {
            padding-bottom: 8px; /* Reduced from 15px to bring underline closer */
        }
        
        .products-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 50px;
            margin-bottom: 40px;
        }

        .product-card {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            background-color: white;
        }

        .product-card img {
            display: block;
            width: 100%;
            height: auto;
            transition: transform 0.4s ease;
        }
        
        .product-card:hover img {
            transform: scale(1.05);
        }
        
        /* === 用户请求修改：将青色竖条改为底部横条 === */
        .product-title-wrapper {
             padding: 20px;
             text-align: center;
             /* 移除 position: relative; 避免干扰外部定位 */
        }

        .product-title {
            font-weight: 500;
            color: var(--secondary-color);
            font-size: 0.9rem;
        }
        
       /* 移除原有的竖条样式 */
        /*
        .product-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 5px;
            background-color: var(--primary-color);
            transform: scaleY(0);
            transition: transform 0.4s ease;
        }
        
        .product-card:hover .product-title::before {
            transform: scaleY(1);
        }
        */

        /* 2. 底部横条样式: 将伪元素附加到 .product-card 上 */
        /* 移除原有的 .product-title-wrapper::after 样式块，改用 .product-card::after */
        
        .product-card::after { 
            content: '';
            position: absolute;
            left: 0;
            bottom: 0; /* 确保定位在卡片最底部 */
            height: 4px; /* 横条厚度 */
            width: 100%;
            background-color: var(--primary-color);
            transform: scaleX(0); /* 初始宽度为零（水平缩放） */
            transform-origin: center center; 
            transition: transform 0.4s ease;
        }
        
        .product-card:hover::after {
            transform: scaleX(1); /* 悬停时水平展开到全宽 */
        }
        /* === 修改结束 === */



        .btn-all-products {
            background-color: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 5px;
            text-transform: uppercase;
            font-weight: 600;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .btn-all-products:hover {
            background-color: var(--primary-color);
        }
        
        .btn-all-products .btn-icon-catalog {
            width: 20px;
            height: 20px;
            transition: transform 0.3s;
        }
        
        .btn-all-products:hover .btn-icon-catalog {
            transform: scale(1.1);
        }

        /* Contact Section */
        .contact-section {
            background-color: var(--primary-color);
            color: var(--light-text-color);
        }
        /* MODIFICATION: Hide contact section by default */
        #contact {
            display: none;
        }
        .contact-section h2 {
            font-size: 2.2rem;
            text-align: center;
        }
        .contact-form {
            max-width: 800px;
            margin: 0 auto;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }
        .form-group input, .form-group textarea {
            width: 100%;
            padding: 12px;
            border-radius: 5px;
            border: 1px solid #ddd;
            font-family: inherit;
            font-size: 1rem;
        }
        .form-group textarea {
            resize: vertical;
            min-height: 150px;
        }
        .form-name-group {
            display: flex;
            gap: 20px;
        }
        .form-name-group > div {
            flex: 1;
        }
        .submit-btn {
            background-color: var(--light-text-color);
            color: var(--primary-color);
            padding: 12px 25px;
            border-radius: 5px;
            min-width: 300px;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 700;
            transition: all 0.3s;
            /* MODIFICATION: Add flex properties for icon alignment */
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        .submit-btn:hover {
            background-color: #eee;
        }
        
        /* MODIFICATION: New style for button icons */
        .btn-icon {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .button-group {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        /* Footer */
        .new-main-footer {
            background-color: var(--primary-color);
            color: var(--text-color);
            padding: 50px 0;
            border-top: 1px solid #eee;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        .footer-column h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--secondary-color);
            position: relative;
            padding-bottom: 10px;
            text-transform: uppercase;
        }
        .footer-column h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 2px;
            background-color: var(--primary-color);
        }
        .footer-column p, .footer-column li {
            margin-bottom: 10px;
            color: #fff;
        }
        .footer-column ul {
            list-style: none;
            padding: 0;
        }
        .footer-column a {
            transition: color 0.3s ease;
        }
        .footer-column a:hover {
            color: var(--secondary-color);
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .contact-item .icon {
            width: 20px;
            height: 20px;
            fill: #fff;
        }
         .contact-item .icon2 {
            width: 33px;
            height: 33px;
            fill: #fff;
        }
        .social-link {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%,#d6249f 60%,#285AEB 90%);
            border-radius: 50%;
            color: white;
            transition: transform 0.3s ease;
        }
        .social-link:hover {
            transform: scale(1.1);
        }
        .social-icon {
            width: 22px;
            height: 22px;
            fill: #ffffff;
        }

        .footer-bottom {
            background-color: var(--footer-bg);
            color: #aaa;
            padding: 25px 0;
            text-align: center;
        }

        .footer-bottom p {
            margin: 5px 0;
            font-size: 0.9rem;
        }


        /* Responsive Design */
        @media (max-width: 768px) {
            .main-header {
                height: auto; /* Reset height for mobile */
                padding: 12px 0;
            }
             .header-controls {
                gap: 5px; /* Reduce gap on mobile */
            }
            .header-btn {
                padding: 6px 10px;
                font-size: 0.8rem;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 60px; /* Adjust to new mobile header height */
                right: 0;
                background-color: #f9f9f9;
                width: 100%;
                text-align: left;
                box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            }
            .main-nav.active {
                display: flex;
            }
            .main-nav ul {
                flex-direction: column;
                width: 100%;
                gap: 0;
                align-items: stretch;
            }
            .main-nav li {
                width: 100%;
            }
            .main-nav a {
                padding: 15px 20px;
                display: block;
                width: 100%;
                border-bottom: 1px solid #f0f0f0;
            }
            .main-nav a:hover {
                color: var(--primary-color); /* 更改移动设备上菜单项的悬停颜色 */
            }
            .hamburger {
                display: flex;
            }
            
            /* MOBILE SEARCH STYLES */
            .header-search {
                display: none; /* Hide desktop search on mobile */
            }

            .search-mobile {
                display: block; /* Show mobile search in nav */
                padding: 10px 20px;
                border-bottom: 1px solid #f0f0f0;
            }
            /* NEW styles for mobile search wrapper */
            .search-mobile-wrapper {
                display: flex;
                align-items: center;
            }
            .search-mobile-wrapper input {
                flex-grow: 1; /* Allow input to take available space */
                width: auto;
                padding: 10px 15px;
                border: 1px solid #ddd;
                border-radius: 5px 0 0 5px;
                font-size: 1rem;
                border-right: none;
            }
            .search-btn-mobile {
                background: #f0f0f0;
                border: 1px solid #ddd;
                border-left: none;
                padding: 10px;
                cursor: pointer;
                display: flex;
                align-items: center;
                justify-content: center;
                border-radius: 0 5px 5px 0;
            }
            .search-btn-mobile svg {
                stroke: var(--secondary-color);
                width: 20px;
                height: 20px;
            }


            /* Mobile Dropdown */
            .dropdown-menu {
                position: static;
                box-shadow: none;
                border: none;
                padding: 5px 0 5px 15px;
                margin: 0 0 0 20px;
                min-width: auto;
                border-radius: 0;
                margin-top: 0;
                background-color: #f9f9f9;

                /* Animation for mobile */
                opacity: 1;
                visibility: visible;
                transform: none;
                transition: max-height 0.3s ease-out;
                max-height: 0;
                overflow: hidden;
            }

            .dropdown.active > .dropdown-menu {
                 max-height: 500px; /* A large enough value to show all items */
            }

            .dropdown-menu li a {
                padding-left: 20px;
                font-size: 0.9em;
                color: #000;
            }
            
            .dropdown-menu li:first-child a {
                border-top: 1px solid #f0f0f0;
            }
            
            .dropdown > a {
                border-bottom: none;
            }
            
            .dropdown.active > a {
                border-bottom: 1px solid #f0f0f0;
            }

            /* Mobile Language Selector */
            .lang-icon {
                stroke: var(--secondary-color); /* --- MODIFIED: 更改移动设备上地球图标的默认颜色 --- */
            }
            
            .language-selector > a:hover .lang-icon {
                stroke: var(--primary-color); /* --- MODIFIED: 更改移动设备上悬停颜色 --- */
            }            
            .lang-text {
                display: inline-block; /* Show text on mobile */
                margin-left: 10px;
            }

            .language-selector > a {
                display: flex;
                align-items: center;
            }
            
            .language-selector > a::after {
                content: ' ▼';
                display: inline-block;
                font-size: 0.7em;
                margin-left: auto; /* Push arrow to the far right */
            }

            .dropdown-menu-right {
                left: 0;
                right: auto;
            }

            .hero h1 {
                font-size: 1.6rem; 
            }
            .hero p {
                font-size: 1rem;
            }
            
            /* START: MODIFICATION FOR H1 on Mobile */
            /* 移除了对标题文本行数的限制，允许其根据需要自由换行 */
            .products-section h1 {
                font-size: 1.3rem; /* 调整字体大小以适应较小的屏幕 */
                line-height: 1.4; /* 调整行高以提高可读性 */
            }
            /* END: MODIFICATION FOR H1 on Mobile */

            .products-section h2 {
                font-size: 1.3rem;
            }

            .expert-section h2 {
                font-size: 1.5rem; 
                line-height: 1.3;
            }

            .expert-content {
                flex-direction: column;
            }
            
            .form-name-group {
                flex-direction: column;
                gap: 20px;
            }

            /* Show 2 product cards per row on small screens */
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 15px; /* Optional: Adjust gap for smaller screens */
            }
        }