* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        
        /* 导航栏样式 */
        .nav {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 80px;
            display: flex;
            align-items: center;
        }
        
        .na1 {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .na1 ul {
            list-style: none;
            display: flex;
            gap: 30px;
        }
        
        .na1 ul li {
            position: relative;
        }
        
        .na1 ul li a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            font-size: 20px;
            padding: 15px 0;
            position: relative;
        }
        
        .na1 ul li a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            bottom: 10px;
            left: 0;
            background-color: #d63031;
            transition: width 0.3s ease;
        }
        
        .na1 ul li a:hover::after {
            width: 100%;
        }
        
        .na1 ul li > div {
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 0 0 5px 5px;
            display: none;
            flex-direction: column;
            min-width: 200px;
            z-index: 100;
            padding: 10px 0;
        }
        
        .na1 ul li > div a {
            padding: 12px 20px;
            display: block;
            color: #555;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        .na1 ul li > div a:hover {
            background: #f8f9fa;
            color: #d63031;
        }
        
        .na1 ul li:hover > div {
            display: flex;
        }
        
        .right-section {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        
        .language {
            cursor: pointer;
            font-size: 20px;
        }
        
        .phone-number {
            font-weight: 500;
            font-size: 20px;
        }
        
        .company-name {
            text-align: center;
            padding: 50px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
        }
        
        .company-name h1 {
            font-size: 36px;
            margin-bottom: 15px;
            color: #ff0000;
        }
        
        .company-name p {
            font-size: 20px;
            color: #7f8c8d;
        }
        
        /* 产品内容区域样式 - 已修改 */
        .product-container {
            max-width: 1400px; /* 增加容器宽度 */
            margin: 50px auto;
            padding: 0 20px;
            flex: 1;
        }
        
        .product-header {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .product-header h2 {
            font-size: 36px;
            color: #2c3e50;
            margin-bottom: 20px;
        }
        
        .product-header p {
            color: #7f8c8d;
            max-width: 800px;
            margin: 0 auto;
            font-size: 18px;
        }
        
        /* 产品网格修改为三列 */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(320px, 1fr)); /* 三列布局 */
            gap: 35px; /* 增加间距 */
        }
        
        /* 产品卡片扩大 */
        .product-card {
            background: white;
            border-radius: 12px; /* 增加圆角 */
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08); /* 增强阴影 */
            transition: all 0.3s ease;
            position: relative;
            display: flex;
            flex-direction: column;
            height: 100%; /* 确保卡片高度一致 */
        }
        
        .product-card:hover {
            transform: translateY(-12px); /* 增加悬停上移距离 */
            box-shadow: 0 18px 35px rgba(0, 0, 0, 0.15);
        }
        
        /* 图片区域扩大 */
        .product-image {
            height: 280px; /* 增加高度 */
            background-color: #f0f2f5;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .product-card:hover .product-image img {
            transform: scale(1.08); /* 增加缩放效果 */
        }
        
        .product-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(214, 48, 49, 0.1);
            opacity: 0;
            transition: opacity 0.3s ease;
            z-index: 1;
        }
        
        .product-card:hover .product-image::before {
            opacity: 1;
        }
        
        .product-content {
            padding: 30px; /* 增加内边距 */
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .product-content h3 {
            font-size: 24px; /* 增大字体 */
            margin-bottom: 18px;
            color: #2c3e50;
            line-height: 1.3;
        }
        
        .product-content p {
            color: #7f8c8d;
            margin-bottom: 25px;
            font-size: 17px; /* 增大字体 */
            flex-grow: 1;
        }
        
        .product-content a {
            display: inline-block;
            padding: 12px 28px; /* 增大按钮 */
            background: #d63031;
            color: white;
            text-decoration: none;
            border-radius: 6px;
            font-weight: 500;
            font-size: 17px;
            transition: all 0.3s ease;
            align-self: flex-start;
        }
        
        .product-content a:hover {
            background: #c23616;
            transform: translateX(8px); /* 增加悬停移动距离 */
        }
        
        /* 产品图片描述标签 */
        .img-label {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(0, 0, 0, 0.8);
            color: white;
            padding: 10px 15px;
            font-size: 15px;
            z-index: 2;
            text-align: center;
            font-weight: 500;
        }
        
        /* 右侧中部悬浮咨询按钮 */
        .floating-contact-btn {
            position: fixed;
            right: 30px;
            top: 50%;
            transform: translateY(-50%);
            background: #d63031;
            color: white;
            width: 75px; /* 增大按钮 */
            height: 75px;
            border-radius: 50%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-size: 30px; /* 增大图标 */
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(214, 48, 49, 0.4);
            z-index: 999;
            transition: all 0.3s ease;
            animation: pulse 2s infinite;
        }
        
        .floating-contact-btn:hover {
            transform: translateY(-50%) scale(1.1);
            box-shadow: 0 8px 20px rgba(214, 48, 49, 0.6);
            animation: none;
        }
        
        .floating-contact-btn span {
            font-size: 13px;
            margin-top: 5px;
            font-weight: 500;
        }
        
        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(214, 48, 49, 0.5);
            }
            70% {
                box-shadow: 0 0 0 15px rgba(214, 48, 49, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(214, 48, 49, 0);
            }
        }
        
        /* 咨询表单弹窗样式 */
        .contact-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .modal-content {
            background: white;
            width: 100%;
            max-width: 500px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            position: relative;
            animation: modalFadeIn 0.3s ease;
        }
        
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .close-modal {
            position: absolute;
            top: 15px;
            right: 15px;
            background: none;
            border: none;
            font-size: 28px;
            cursor: pointer;
            color: #7f8c8d;
            z-index: 10;
        }
        
        .close-modal:hover {
            color: #d63031;
        }
        
        .contact-form {
            padding: 35px;
        }
        
        .contact-form h2 {
            font-size: 28px;
            margin-bottom: 25px;
            color: #2c3e50;
            text-align: center;
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 500;
            color: #2c3e50;
            font-size: 16px;
        }
        
        .form-control {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: border 0.3s ease;
        }
        
        .form-control:focus {
            border-color: #d63031;
            outline: none;
            box-shadow: 0 0 0 3px rgba(214, 48, 49, 0.2);
        }
        
        .required {
            color: #d63031;
        }
        
        .btn {
            background: #d63031;
            color: white;
            border: none;
            padding: 15px 25px;
            font-size: 18px;
            font-weight: 500;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        
        .btn:hover {
            background: #c23616;
        }
        
        .message {
            padding: 18px;
            margin-bottom: 25px;
            border-radius: 5px;
            display: none;
            font-size: 16px;
        }
        
        .success {
            background: #d4edda;
            color: #155724;
            display: block;
        }
        
        .error {
            background: #f8d7da;
            color: #721c24;
            display: block;
        }
        
        /* 页脚样式 - 已修复 */
        footer {
            background: #2c3e50;
            color: white;
            padding: 50px 0 30px;
            margin-top: 70px;
            width: 100%;
            flex-shrink: 0;
        }
        
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 35px;
            justify-items: center;
        }
        
        .footer-column {
            width: 100%;
            max-width: 350px;
            padding: 0 15px;
        }
        
        .footer-column h3 {
            font-size: 22px;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
            text-align: left;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: #d63031;
        }
        
        .footer-column ul {
            list-style: none;
            padding: 0;
        }
        
        .footer-column ul li {
            margin-bottom: 15px;
            font-size: 16px;
            display: flex;
            align-items: flex-start;
        }
        
        .footer-column ul li i {
            margin-right: 10px;
            min-width: 20px;
            margin-top: 3px;
        }
        
        .footer-column ul li a {
            color: #ecf0f1;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-column ul li a:hover {
            color: #d63031;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 2px solid rgba(255, 255, 255, 0.1);
            color: #bdc3c7;
            font-size: 16px;
            width: 100%;
            max-width: 1200px;
            margin: 40px auto 0;
            padding: 30px 20px 0;
        }
        
        /* 响应式调整 */
        @media (max-width: 1200px) {
            .product-grid {
                grid-template-columns: repeat(2, minmax(320px, 1fr)); /* 中等屏幕显示两列 */
            }
        }
        
        @media (max-width: 992px) {
            .na1 ul li a {
                font-size: 16px;
                padding: 12px 0;
            }
            
            .na1 ul li > div a {
                font-size: 14px;
            }
        }
        
        @media (max-width: 768px) {
            .nav {
                height: auto;
                padding: 15px 0;
            }
            
            .na1 {
                flex-wrap: wrap;
            }
            
            .na1 ul {
                width: 100%;
                margin-top: 15px;
                justify-content: center;
                gap: 15px;
                flex-wrap: wrap;
            }
            
            .na1 ul li a {
                font-size: 14px;
                padding: 10px 5px;
            }
            
            .product-grid {
                grid-template-columns: 1fr; /* 小屏幕显示单列 */
            }
            
            .floating-contact-btn {
                width: 60px;
                height: 60px;
                font-size: 24px;
                right: 15px;
            }
            
            .modal-content {
                width: 95%;
            }
            
            .company-name h1 {
                font-size: 28px;
            }
            
            .company-name p {
                font-size: 16px;
            }
            
            /* 图片高度在小屏幕上适当减小 */
            .product-image {
                height: 240px;
            }
            
            /* Footer 响应式调整 */
            .footer-container {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            
            .footer-column {
                max-width: 100%;
                text-align: center;
                padding: 0 10px;
            }
            
            .footer-column h3 {
                text-align: center;
            }
            
            .footer-column h3::after {
                left: 50%;
                transform: translateX(-50%);
            }
            
            .footer-column ul li {
                justify-content: center;
            }
            
            footer {
                margin-top: 40px;
                padding: 40px 0 20px;
            }
            
            .footer-bottom {
                padding-top: 20px;
                font-size: 14px;
            }
        }
        
        @media (max-width: 480px) {
            .product-image {
                height: 220px;
            }
            
            .product-content {
                padding: 20px;
            }
            
            .product-content h3 {
                font-size: 22px;
            }
            
            .product-content p {
                font-size: 16px;
            }
        }
        
        @media (max-height: 600px) {
            .floating-contact-btn {
                top: auto;
                bottom: 30px;
                transform: none;
            }
        }