:root {
            --primary-blue: #0066cc;
            --primary-dark: #004080;
            --primary-light: #4d94ff;
            --accent: #ff6b35;
            --accent-dark: #e55a2b;
            --light-bg: #f8f9fa;
            --dark-text: #333333;
            --mid-text: #5A5A5A;
            --light-text: #777777;
            --white: #ffffff;
            --border-color: #eaeaea;
            --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --hover-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
            --header-height: 90px;
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Roboto', 'Noto Sans SC', sans-serif;
            color: var(--dark-text);
            line-height: 1.6;
            background-color: var(--light-bg);
            overflow-x: hidden;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 4px;
        }
        
        .section {
            padding: 38px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary-dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
            font-weight: 700;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent);
            border-radius: 2px;
        }
        
        .section-title p {
            color: var(--mid-text);
            max-width: 700px;
            margin: 30px auto 0;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: 4px;
            font-weight: 500;
            transition: var(--transition);
            text-align: center;
            cursor: pointer;
            font-size: 16px;
            border: none;
            outline: none;
            gap: 8px;
        }
        
        .btn-primary {
            background-color: var(--accent);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.25);
        }
        
        .btn-primary:hover {
            background-color: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(255, 107, 53, 0.35);
        }
        
        .btn-outline {
            background-color: #0066cc;
            color: #ffffff;
            border: 2px solid var(--primary-blue);
        }
        
        .btn-outline:hover {
            background-color: #0066cc;
            transform: translateY(-3px);
        }
        
        @media (max-width: 599px) {
            .hide-on-mobile {
                display: none;
            }
        }
		     /* 移动端菜单激活状态 */
        .mobile-menu-active {
            overflow: hidden;
        }
        
        /* 移动端菜单遮罩 */
        .menu-overlay {
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--header-height));
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        
        .menu-overlay.active {
            opacity: 1;
            visibility: visible;
        }

		.friend-links {
		    text-align: center;
		    font-size: 14px;
            color: #aaa;
            background: #1a1f2e;
        }
        /* 头部样式 */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: var(--white);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            z-index: 1000;
            transition: var(--transition);
        }
        
        .header.scrolled {
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .top-bar {
            background: var(--primary-dark);
            color: var(--white);
            padding: 8px 0;
            font-size: 14px;
        }
        
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .contact-info {
            display: flex;
            gap: 20px;
        }
        
        .contact-info a {
            color: rgba(255, 255, 255, 0.85);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        
        .contact-info a:hover {
            color: var(--white);
        }
        
        .language-selector {
            display: flex;
            gap: 10px;
        }
        
        .language-selector a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        
        .language-selector a.active {
            color: var(--white);
            font-weight: 500;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: var(--header-height);
        }
        
        /* 修改后的logo样式 */
        .logo {
            display: flex;
            align-items: center;
            height: 110px; /* 固定高度 */
        }
        
        .logo img {
            height: 100%; /* 图片高度与容器相同 */
            width: auto;  /* 宽度自动，保持比例 */
            object-fit: contain;
        }
        
        /* 主导航菜单 - 优化居中 */
        .nav-bottom {
            display: flex;
            justify-content: center;
            width: 100%;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            justify-content: center;
            margin: 0 auto;
            padding: 0;
        }
        
        .nav-menu > li {
            position: relative;
            text-align: center;
        }
        
        .nav-menu > li > a {
            padding: 15px 20px;
            display: flex;
            align-items: center;
            color: var(--dark-text);
            font-weight: 500;
            font-size: 16px;
            transition: var(--transition);
            border-radius: 6px;
            gap: 6px;
            white-space: nowrap;
        }
        
        .nav-menu > li > a:hover,
        .nav-menu > li > a.active {
            color: var(--primary-blue);
            background: rgba(0, 102, 204, 0.05);
        }
        
        /* 下拉菜单样式 */
        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            background: var(--white);
            box-shadow: var(--card-shadow);
            min-width: 240px;
            border-radius: 10px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(15px);
            transition: var(--transition);
            z-index: 1000;
            padding: 15px 0;
            border-top: 3px solid var(--accent);
        }
        
        .nav-menu > li:hover > .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(5px);
        }
        
        .dropdown li {
            list-style: none;
            padding: 0;
        }
        
        .dropdown li a {
            display: flex;
            padding: 6px 10px;
            color: var(--mid-text);
            transition: var(--transition);
            font-size: 15px;
            align-items: center;
            gap: 10px;
        }
        
        .dropdown li a:hover {
            background: rgba(0, 102, 204, 0.05);
            color: var(--primary-blue);
            padding-left: 25px;
        }
        
        /* 产品中心特殊下拉 - 多列布局 */
        .products-dropdown {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 15px;
            padding: 15px;
            left: 50%;
            transform: translateX(-50%) translateY(15px);
        }
        
        .nav-menu > li:hover > .products-dropdown {
            transform: translateX(-20%) translateY(5px);
        }
        
        .product-category {
		   width: 258px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        
        .product-category:hover {
            background: rgba(0, 102, 204, 0.03);
        }
        
        .product-category h4 {
            color: var(--primary-dark);
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
        }
        
        .product-category h4 i {
            background: var(--light-bg);
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            font-size: 16px;
            color: var(--primary-blue);
        }
        
        .sub-items {
            list-style: none;
            padding-left: 4px;
        }
        
        .sub-items li {
            padding: 2px 0;
        }
        
        .sub-items a {
            color: var(--mid-text);
            font-size: 14px;
            transition: var(--transition);
            display: block;
            padding: 4px 0;
        }
        
        .sub-items a:hover {
            color: var(--primary-blue);
            padding-left: 5px;
        }
        
        .header-main {
            padding: 15px 0;
            background: var(--white);
        }
        
        .header-main .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .header-right {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        
        /* 搜索框样式 */
        .search-container {
            position: relative;
        }
        
        .search-container input {
            padding: 12px 15px 12px 45px;
            border-radius: 30px;
            border: 1px solid var(--border-color);
            background: var(--white);
            color: var(--dark-text);
            font-size: 14px;
            width: 180px;
            transition: var(--transition);
        }
        
        .search-container input:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.15);
            width: 240px;
        }
        
        .search-container input::placeholder {
            color: var(--light-text);
        }
        
        .search-container i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--light-text);
        }
        
        /* 电话按钮样式 */
        .nav-phone {
            display: flex;
            align-items: center;
            padding: 12px 24px;
            background: var(--accent);
            color: var(--white);
            border-radius: 30px;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.25);
            font-size: 18px;
            gap: 8px;
        }
        
        .nav-phone:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.35);
        }
        
        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            color: var(--primary-dark);
            cursor: pointer;
            background: var(--light-bg);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        
        .mobile-menu-btn:hover {
            background: rgba(0, 102, 204, 0.1);
            color: var(--primary-blue);
        }
        
        /* 移动端菜单样式 */
        @media (max-width: 1200px) {
            .nav-menu > li > a {
                padding: 12px 15px;
                font-size: 15px;
            }
            
            .products-dropdown {
                width: 700px;
            }
        }
        
        @media (max-width: 992px) {
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: -100%;
                width: 80%;
                max-width: 400px;
                height: calc(100vh - var(--header-height));
                background: var(--white);
                flex-direction: column;
                padding: 20px;
                box-shadow: 5px 0 15px rgba(0, 0, 0, 0.1);
                overflow-y: auto;
                transition: left 0.3s ease;
                justify-content: flex-start;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu > li {
                width: 100%;
            }
            
            .nav-menu > li > a {
                padding: 15px;
                border-radius: 6px;
                margin-bottom: 5px;
                justify-content: space-between;
            }
            
            .nav-menu > li > a i:last-child {
                margin-left: auto;
                transition: transform 0.3s ease;
            }
            
            .nav-menu > li > a.has-dropdown.active i:last-child {
                transform: rotate(180deg);
            }
            
            .dropdown {
                position: static;
                width: 100%;
                box-shadow: none;
                border: none;
                margin: 10px 0;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
                padding: 0 0 0 20px;
            }
            
            .dropdown.active {
                display: block;
            }
            
            .products-dropdown {
                width: 100%;
                grid-template-columns: 1fr;
                gap: 10px;
                padding: 10px 0 10px 20px;
                left: 0;
                transform: none;
            }
            
            .nav-menu > li:hover > .products-dropdown {
                transform: none;
            }
            
            .product-category h4 {
                font-size: 15px;
                margin-bottom: 10px;
            }
            
            .sub-items {
                padding-left: 20px;
            }
            
            .search-container, .nav-phone span {
                display: none;
            }
            
            .mobile-menu-btn {
                display: flex;
            }
            
            .nav-phone {
                padding: 10px;
                font-size: 0;
            }
            
            .nav-phone i {
                margin: 0;
                font-size: 18px;
            }
        }
        
        @media (max-width: 768px) {
		     .header-main {
            padding: 2px 0;
            background: var(--white);
        }
            .top-bar .container {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            
            .contact-info {
                justify-content: center;
                flex-wrap: wrap;
            }
            
            .nav-container {
                padding: 15px 0;
                height: auto;
            }
            .logo{
               display: flex;
               align-items: center;
               height:100px;
           }
            .logo img {
                max-width: 304px; /* 移动端调整logo大小 */
            }
            .header-main .container {
                flex-wrap: wrap;
            }
		 .header-right {
            display: none;
           }
        }

         /* 页脚 */
	.footer {
            background: #1a1f2e;
            color: #aaa;
            padding-top: 80px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
        }
        
        .footer-column h3 {
            color: var(--white);
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: var(--accent);
        }
        
        .footer-links {
            list-style: none;
            margin-top: 20px;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #aaa;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .footer-links a i {
            font-size: 0.8rem;
            color: var(--accent);
        }
        
        .footer-links a:hover {
            color: var(--white);
            padding-left: 5px;
            gap: 15px;
        }
        
        .contact-info-footer {
            list-style: none;
        }
        
        .contact-info-footer li {
            display: flex;
            margin-bottom: 20px;
            gap: 15px;
        }
        
        .contact-info-footer i {
            color: var(--accent);
            font-size: 1.2rem;
            margin-top: 5px;
        }
        
        .contact-info-footer div {
            flex: 1;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #aaa;
            transition: var(--transition);
        }
        
        .social-links a:hover {
            background: var(--accent);
            color: var(--white);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding: 30px 0;
            border-top: 1px solid #2a3042;
            margin-top: 60px;
            font-size: 0.9rem;
        }