/* 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: 'Roboto', sans-serif;*/
            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);
        }

        .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: 60px 0;
            text-align: center;
            background-color: #f9f9f9;
        }
        .products-section h2 {
            font-size: 2.2rem;
            margin-bottom: 10px;
            display: inline-block;
            position: relative;
        }
        .products-section h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background-color: var(--primary-color);
        }
        
        .products-grid {
            margin-top: 0;
            margin-bottom: 40px;
            text-align: left; /* Align grid content to the left */
        }

        .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);
        }
        
        .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);*/
            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;
            white-space: nowrap; /* Prevents text from wrapping */
        }

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

        .btn-icon-catalog {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
        }

        /* 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;
        }
        
        /* --- START: Added styles for Product Gallery --- */
        .thumbnail-active {
          /* border-color: #3b82f6; /* blue-500 */
          /* box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.5);*/
          border-color: var(--primary-color); /* blue-500 */
          box-shadow: 0 0 0 2px var(--primary-color);
        }
        /* For Webkit browsers like Chrome, Safari */
        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        /* For Firefox */
        .no-scrollbar {
            scrollbar-width: none;
        }
        /* Font optimization to match detail.html */
        .product-detail-title {
            font-family: 'Segoe UI semibold', sans-serif;
            font-weight: 700;
            color: var(--secondary-color);
        }
        .product-detail-text, .product-detail-text h2, .product-detail-text li {
             font-family: 'Segoe UI', sans-serif;
             line-height: 1.6;
             font-size: 1rem; /* Adjust to match base font size */
        }
        .product-detail-text h2 {
             font-weight: 700;
             color: var(--secondary-color);
        }
        .product-detail-text li {
            color: var(--text-color);
        }
        .product-detail-text .font-medium {
            color:var(--secondary-color);
            font-weight: 500;
        }
        /* --- END: Added styles for Product Gallery --- */

        /* --- START: Breadcrumb Styles --- */
        .breadcrumb {
            font-size: 0.9rem;
            color: #6b7280; /* gray-500 */
            margin-bottom: 1rem;
        }
        .breadcrumb a {
            transition: color 0.3s;
        }
        .breadcrumb a:hover {
            color: var(--primary-color);
        }
        .breadcrumb span {
            margin: 0 0.5rem;
            color: #6b7280; /* gray-500 */
        }
        /* --- END: Breadcrumb Styles --- */
        
        #related-products {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 30px; /* Reduced margin-top */
        }

        /* Manually added Tailwind-like classes */
        .bg-white { background-color: #fff; }
        .rounded-xl { border-radius: 0.75rem; }
        .shadow-lg { box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05); }
        .overflow-hidden { overflow: hidden; }
        .my-8 { margin-top: 2rem; margin-bottom: 2rem; }
        .p-6 { padding: 1.5rem; }
        /* .sm\:p-8 { padding: 2rem; } */ /* Handled in media query */
        .grid { display: grid; }
        .grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
        /* .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); } */ /* Handled in media query */
        .gap-8 { gap: 2rem; }
        /* .lg\:col-span-3 { grid-column: span 3 / span 3; } */ /* Handled in media query */
        .flex { display: flex; }
        .flex-col { flex-direction: column; }
        .gap-4 { gap: 1rem; }
        .relative { position: relative; }
        .flex-1 { flex: 1 1 0%; }
        .order-1 { order: 1; }
        .w-full { width: 100%; }
        .h-auto { height: auto; }
        .object-cover { object-fit: cover; }
        .rounded-lg { border-radius: 0.5rem; }
        .aspect-square { aspect-ratio: 1 / 1; }
        .absolute { position: absolute; }
        .left-3 { left: 0.75rem; }
        .top-1\/2 { top: 50%; }
        .-translate-y-1\/2 { transform: translateY(-50%); }
        .bg-white\/80 { background-color: #fff; border: 1px solid #eee; }
        .hover\:bg-white:hover { background-color: #f9f9f9; }
        .rounded-full { border-radius: 9999px; }
        .w-10 { width: 2.5rem; }
        .h-10 { height: 2.5rem; }
        .items-center { align-items: center; }
        .justify-center { justify-content: center; }
        .text-gray-700 { color: #4a5568; }
        /* .shadow-md { box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06); } */ /* Removed to avoid conflicts */
        .transition { transition-property: background-color, border-color, color, fill, stroke, opacity, box-shadow, transform; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 150ms; }
        .right-3 { right: 0.75rem; }
        .order-2 { order: 2; }
        .flex-row { flex-direction: row; }
        .gap-3 { gap: 0.75rem; }
        .overflow-x-auto { overflow-x: auto; }
        .pb-2 { padding-bottom: 0.5rem; }
        .pt-2 { padding-top: 0.5rem; }
        .w-24 { width: 6rem; }
        .h-24 { height: 6rem; }
        .flex-shrink-0 { flex-shrink: 0; }
        .cursor-pointer { cursor: pointer; }
        .rounded-md { border-radius: 0.375rem; }
        .border-2 { border-width: 2px; }
        .border-transparent { border-color: transparent; }
        .hover\:border-blue-400:hover { border-color: #63b3ed; }
        /* .lg\:col-span-2 { grid-column: span 2 / span 2; } */ /* Handled in media query */
        .pt-4 { padding-top: 1rem; }
        .text-xl { font-size: 1.25rem; } /* Added for new title size */
        .text-2xl { font-size: 1.5rem; }
        /* .sm\:text-3xl { font-size: 1.875rem; } */ /* Handled in media query */
        .sm\:text-2xl { font-size: 1.5rem; } /* Added for new title size */
        .font-bold { font-weight: 700; }
        .leading-tight { line-height: 1.25; }
        .mt-8 { margin-top: 2rem; }
        .space-y-8 > :not([hidden]) ~ :not([hidden]) { margin-top: 2rem; }
        .text-base { font-size: 1rem; }
        .font-semibold { font-weight: 600; }
        .mb-3 { margin-bottom: 0.75rem; }
        .text-lg { font-size: 1.125rem; }
        .list-none { list-style-type: none; }
        .list-inside { list-style-position: inside; }
        .space-y-2 > :not([hidden]) ~ :not([hidden]) { margin-top: 0.5rem; }
        .pl-2 { padding-left: 0.5rem; }
        .font-medium { font-weight: 500; }
        .inline-flex { display: inline-flex; }
        .w-5 { width: 1.25rem; }
        .h-5 { height: 1.25rem; }
        .mr-2 { margin-right: 0.5rem; }
        .text-center { text-align: center; }
         .bg-transparent { background-color: transparent; }
        .border-white { border-color: #fff; }
        .text-white { color: #fff; }
        .hover\:text-gray-800:hover { color: #2d3748; }       
        /* --- START: Added for user request (opacity) --- */
        .hover\:opacity-75:hover { opacity: 0.75; }
        /* --- END: Added for user request (opacity) --- */
        
        /* --- START: Added for white circle buttons --- */
        .bg-white-t-30 {
            background-color: rgba(255, 255, 255, 0.3);
            border: 1px solid #e6ebee; /* 已添加边框 */
        }
        .hover\:bg-white-t-50:hover {
            background-color: rgba(255, 255, 255, 0.5);
        }
        /* --- END: Added for white circle buttons --- */

        /* --- START: Added styles for user request --- */
        .product-detail-text .section-title-underline {
            position: relative;
            display: inline-block; /* Required for underline to match text width */
            padding-bottom: 8px; /* Space for the line */
        }
        .product-detail-text .section-title-underline::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%; /* Match text width */
            height: 3px;
            background-color: var(--primary-color); /* --primary-color */
            
            /* Override .products-section h2::after */
            transform: none;
        }
        
        #you-may-like-title {
            display: inline-block; 
            position: relative;
            padding-bottom: 10px;
            margin-top: 60px; 
            color: var(--secondary-color);
            text-transform: uppercase;
        }
        #you-may-like-title::after {
            /* This overrides .products-section h2::after */
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%; /* Match text width */
            height: 3px;
            background-color: var(--primary-color); /* --primary-color */
            transform: none; /* Override the transform: translateX(-50%) */
        }
        /* --- END: Added styles for user request --- */
        
        @media (min-width: 640px) {
            .sm\:p-8 { padding: 2rem; }
            .sm\:text-3xl { font-size: 1.875rem; }
            .sm\:text-2xl { font-size: 1.5rem; } /* Added for new title size */
        }
        
        @media (min-width: 1024px) {
            .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
            .lg\:col-span-3 { grid-column: span 3 / span 3; }
            .lg\:col-span-2 { grid-column: span 2 / span 2; }
        }

        /* --- START: Added for Desktop Language Hover --- */
        @media (min-width: 769px) { /* This targets screens larger than the mobile breakpoint */
            .language-selector:hover .dropdown-menu {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
        }
        /* --- END: Added for Desktop Language Hover --- */

        /* 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; /* --- MODIFIED: Changed from white to light gray --- */
                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: 1.8rem; /* Adjusted for one line display */
            }
            .hero p {
                font-size: 1rem;
            }
            
            .expert-section h2 {
                font-size: 1.7rem; /* Adjusted for two line display */
                line-height: 1.3;
            }

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

            #related-products {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            
            /* Product Detail Page Mobile Optimizations */
            .p-6.sm\:p-8 {
                padding: 1rem; /* reduce padding inside the card */
            }
            .grid.gap-8 {
                gap: 1.5rem; /* reduce gap between image and text */
                grid-template-columns: 1fr; /* Stack image and text */
            }
            .lg\:col-span-2.pt-4 {
                padding-top: 0;
            }
            .product-detail-title.text-xl.sm\:text-2xl { /* Updated rule */
                font-size: 1.4rem;
                line-height: 1.3;
            }
            .thumbnail.w-24.h-24 {
                width: 4rem;
                height: 4rem;
            }
            #prevBtn, #nextBtn {
                width: 2.25rem;
                height: 2.25rem;
            }

            /* New rules for the catalog button on small screens */
            .btn-all-products {
                font-size: 0.9rem;
                padding: 8px 12px;
                gap: 5px;
            }
            .btn-all-products .btn-icon-catalog {
                width: 20px;
                height: 20px;
            }
            /* MODIFIED: Rule for "You May Also Like" heading on small screens */
            .products-section h2.text-xl { /* Updated rule */
                font-size: 1.4rem; /* Matched to product-detail-title */
                /* white-space: nowrap; */ /* Removed to match h1 */
            }
        }