/* ===== 全局基础样式 ===== */
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            margin: 0;
            padding: 0;
            color: #333;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* ===== 头部与导航 ===== */
        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .logo-icon img {
            max-height: 60px;
            width: auto;
        }
        .logo-text {
            font-size: 20px;
            font-weight: bold;
            color: #003366;
        }
        .logo-subtext {
            font-size: 12px;
            color: #666;
            letter-spacing: 1px;
        }
        
        /* 导航菜单 - PC版横排 */
        nav ul {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        nav ul li a {
            padding: 10px 16px;
            text-decoration: none;
            color: #333;
            font-weight: 500;
            display: block;
        }
        nav ul li a.active,
        nav ul li a:hover {
            color: #005bac;
        }
        
        /* ===== 移动端适配：直接显示文字导航，无按钮 ===== */
        @media (max-width: 992px) {
            .header-container {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .logo {
                margin-bottom: 15px;
                width: 100%;
            }
            
            /* 导航在移动端直接显示，无需按钮触发 */
            nav#mainNav {
                display: block !important;
                width: 100%;
            }
            
            nav ul {
                flex-direction: row;
                flex-wrap: wrap;
                justify-content: flex-start;
                background: transparent;
                padding: 0;
                margin-top: 5px;
                gap: 5px;
            }
            
            nav ul li {
                margin: 0;
                padding: 0;
            }
            
            nav ul li a {
                padding: 8px 16px;
                background: #f0f4f8;
                border-radius: 30px;
                margin-right: 8px;
                margin-bottom: 8px;
                font-size: 15px;
                color: #005bac;
                border: 1px solid #e0e8ef;
                transition: all 0.2s;
            }
            
            nav ul li a.active {
                background: #005bac;
                color: white;
                border-color: #005bac;
            }
            
            nav ul li a:hover {
                background: #005bac;
                color: white;
            }
            
            /* 完全隐藏任何可能的菜单按钮 */
            .mobile-menu-btn,
            #mobileMenuBtn,
            [id*="mobileMenu"],
            [class*="mobile-menu"] {
                display: none !important;
            }
        }
        
        /* 超小屏适配 */
        @media (max-width: 600px) {
            .logo-text {
                font-size: 18px;
            }
            .logo-subtext {
                font-size: 10px;
            }
            nav ul li a {
                padding: 6px 14px;
                font-size: 14px;
            }
        }
        
        /* ===== 轮播图样式 - 完全重构确保功能 ===== */
        .banner-container {
            position: relative;
            width: 100%;
            overflow: hidden;
            margin-top: 0;
        }
        
        .banner-slider {
            display: flex;
            width: 100%;
            transition: transform 0.5s ease;
            will-change: transform;
        }
        
        .banner-slide {
            flex: 0 0 100%;
            position: relative;
            width: 100%;
        }
        
        .banner-slide img {
            width: 100%;
            height: 500px;
            object-fit: cover;
            display: block;
            pointer-events: none;
        }
        
        .banner-content {
            position: absolute;
            top: 50%;
            left: 10%;
            transform: translateY(-50%);
            color: white;
            text-shadow: 0 2px 10px rgba(0,0,0,0.3);
            max-width: 500px;
            z-index: 5;
        }
        
        .banner-content h1 {
            font-size: 36px;
            margin-bottom: 15px;
        }
        
        .banner-btn {
            display: inline-block;
            padding: 12px 30px;
            background: #005bac;
            color: white;
            text-decoration: none;
            border-radius: 4px;
            font-weight: 500;
            margin-top: 15px;
            transition: background 0.3s;
        }
        
        .banner-btn:hover {
            background: #00468c;
        }
        
        .banner-arrow {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 50px;
            height: 50px;
            background: rgba(0,0,0,0.5);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            cursor: pointer;
            z-index: 20;
            transition: background 0.3s;
        }
        
        .banner-arrow:hover {
            background: rgba(0,0,0,0.8);
        }
        
        .banner-arrow.prev { left: 20px; }
        .banner-arrow.next { right: 20px; }
        
        .banner-controls {
            position: absolute;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 10px;
            z-index: 20;
        }
        
        .banner-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: rgba(255,255,255,0.5);
            cursor: pointer;
            transition: background 0.3s;
        }
        
        .banner-dot.active {
            background: white;
        }
        
        @media (max-width: 768px) {
            .banner-slide img { 
                height: 350px; 
            }
            .banner-content h1 { 
                font-size: 24px; 
            }
            .banner-content p { 
                font-size: 14px; 
            }
            .banner-arrow { 
                width: 36px; 
                height: 36px; 
            }
        }
        
        /* ===== 页脚样式 ===== */
        footer {
            background: #1a2b3c;
            color: #ddd;
            padding: 40px 0 20px;
            margin-top: 50px;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .footer-logo {
            font-size: 24px;
            font-weight: bold;
            color: white;
            margin-bottom: 15px;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
        }
        .footer-links a:hover {
            color: white;
        }
        .footer-contact p {
            margin-bottom: 8px;
        }
        .footer-contact i {
            width: 25px;
            color: #005bac;
        }
        .copyright {
            text-align: center;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            color: #aaa;
        }
        .copyright a {
            color: #aaa;
            text-decoration: none;
        }
        .copyright a:hover {
            color: white;
        }
        
        /* ===== 内容区域样式 ===== */
        .section-title {
            font-size: 28px;
            color: #003366;
            margin-bottom: 30px;
            position: relative;
            padding-bottom: 12px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: #005bac;
        }
        .intro-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .intro-image img {
            width: 100%;
            border-radius: 8px;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }
        .intro-feature {
            display: flex;
            gap: 12px;
        }
        .feature-icon {
            color: #005bac;
            font-size: 24px;
        }
        .contact-info {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .contact-item {
            text-align: center;
            padding: 30px 20px;
            background: #f8f9fa;
            border-radius: 8px;
        }
        .contact-icon {
            font-size: 36px;
            color: #005bac;
            margin-bottom: 15px;
        }
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .product-card {
            border: 1px solid #eee;
            border-radius: 8px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .product-image {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .product-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s;
        }
        .product-card:hover .product-image img {
            transform: scale(1.05);
        }
        .product-tag {
            position: absolute;
            top: 10px;
            right: 10px;
            background: #ff6b6b;
            color: white;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            z-index: 2;
        }
        .product-info {
            padding: 20px;
        }
        .product-title {
            font-size: 18px;
            margin-bottom: 10px;
            color: #003366;
        }
        .product-desc {
            color: #666;
            margin-bottom: 15px;
            line-height: 1.5;
        }
        .product-link {
            color: #005bac;
            text-decoration: none;
            font-weight: 500;
        }
        .product-link i {
            transition: transform 0.2s;
        }
        .product-link:hover i {
            transform: translateX(5px);
        }
        
        /* 移动端内容适配 */
        @media (max-width: 992px) {
            .intro-content,
            .contact-info,
            .products-grid {
                grid-template-columns: 1fr;
            }
            .intro-content {
                gap: 30px;
            }
            .intro-features {
                grid-template-columns: 1fr 1fr;
            }
            .contact-item {
                padding: 20px;
            }
            .section-title {
                font-size: 24px;
            }
        }
        
        @media (max-width: 600px) {
            .intro-features {
                grid-template-columns: 1fr;
            }
        }
        
        /* 移除所有移动菜单按钮相关元素 */
        .mobile-menu-btn, 
        #mobileMenuBtn, 
        .fas.fa-bars {
            display: none !important;
        }