:root {
            --primary: #003C71;
            --primary-light: #2A5C8C;
            --primary-dark: #00294D;
            --secondary: #FF6B35;
            --light: #FFFFFF;
            --dark: #333333;
            --gray: #6A737D;
            --light-gray: #F5F5F5;
            --border: #E0E6ED;
        }

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

        body {
            font-family: 'Roboto', sans-serif;
            color: var(--dark);
            background-color: var(--light);
            overflow-x: hidden;
            line-height: 1.6;
            overflow-x: hidden;
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
        }

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

        /* Top Bar - Improved for mobile */
        .top-bar {
            background-color: var(--primary-dark);
            color: var(--light);
            padding: 8px 0;
            font-size: 0.85rem;
        }

        .top-bar-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
        }

        .contact-info {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .contact-info span i {
            margin-right: 5px;
        }

        .social-icons {
            display: flex;
            gap: 15px;
        }

        .social-icons a {
            color: rgba(255, 255, 255, 0.8);
            transition: color 0.3s;
        }

        .social-icons a:hover {
            color: var(--secondary);
        }
        .language-selector {
            background-color: rgba(0, 60, 113, 0.1); /* 浅灰色半透明背景 */
            border-radius: 4px;
            padding: 8px 15px; /* 上下8px 左右15px */
            display: flex;
            gap: 10px; /* 元素间间距 */
        }
        
        .language-selector a {
            display: inline-block; /* 使a标签支持宽高和padding */
            background: none;
            border: none;
            font-size: 14px;
            cursor: pointer;
            padding: 3px 8px;
            border-radius: 3px;
            transition: all 0.3s;
            text-decoration: none; /* 移除下划线 */
            color: inherit; /* 继承父级颜色 */
        }
        
        .language-selector a:hover {
            background-color: rgba(0, 60, 113, 0.15); /* 悬停时的稍深灰色 */
        }
        
        .language-selector a.active {
            background-color: var(--secondary, #ff5722); /* 橙色背景 (含备用值) */
            color: white;
            font-weight: 500;
        }

        /* Header & Navigation - Improved for mobile */
        header {
            background-color: var(--light);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
            position: relative;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            z-index: 1001;
        }

        .logo i {
            font-size: 30px;
            color: var(--secondary);
        }

        .logo h1 {
            font-size: 1.7rem;
            color: var(--primary);
        }

        .logo span {
            color: var(--secondary);
        }

        /* Mobile Hamburger Menu */
        .mobile-toggle {
            display: none;
            font-size: 1.8rem;
            color: var(--primary);
            background: none;
            border: none;
            cursor: pointer;
            z-index: 1001;
            width: 40px;
            height: 40px;
            justify-content: center;
            align-items: center;
        }

        nav {
            background-color: var(--primary);
            transition: all 0.4s ease;
        }

        .nav-container {
            padding: 0 10px;
        }

        .main-nav {
            display: flex;
            list-style: none;
            transition: transform 0.4s ease;
        }

        .main-nav>li {
            position: relative;
        }

        .main-nav>li>a {
            display: flex;
            align-items: center;
            color: white;
            text-decoration: none;
            padding: 15px 18px;
            font-weight: 500;
            transition: all 0.3s;
            font-size: 1.05rem;
        }

        .main-nav>li>a:hover {
            background-color: var(--primary-light);
        }

        .main-nav>li>a i {
            margin-right: 8px;
        }
        .main-nav.container>li.current{
            background-color: var(--secondary);
        }
        /* Dropdown Menus with Mobile Support */
        /* Dropdown Menus - Three Levels */
        .dropdown {
            position: relative;
        }

        .dropdown>a:after {
            content: "\f107";
            font-family: 'Font Awesome 5 Free';
            font-weight: 900;
            margin-left: 8px;
            font-size: 0.9rem;
            transition: transform 0.3s;
        }

        .dropdown:hover>a:after {
            transform: rotate(180deg);
        }

        .dropdown-content {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: white;
            min-width: 220px;
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;

        }

        .dropdown:hover .dropdown-content {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            max-height: 1000px;
        }

        .dropdown-content li {
            position: relative;
            border-bottom: 1px solid var(--border);
        }

        .dropdown-content li:last-child {
            border-bottom: none;
        }

        .dropdown-content li a {
            display: block;
            padding: 12px 20px;
            color: var(--dark);
            text-decoration: none;
            transition: all 0.3s;
            font-size: 0.95rem;
        }

        .dropdown-content li a:hover {
            background-color: rgba(0, 60, 113, 0.05);
            padding-left: 25px;
        }

        .dropdown-content li a i {
            margin-right: 8px;
            font-size: 0.9rem;
        }

        /* Third Level Menu */
        .submenu-trigger {
            position: relative;
            padding-right: 35px !important;
        }

        .submenu-trigger:after {
            content: "\f105";
            font-family: 'Font Awesome 5 Free';
            font-weight: 900;
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 0.9rem;
            transition: transform 0.3s;
            color: var(--dark);
        }

        .dropdown-submenu {
            position: relative;
            list-style: none;
        }

        .dropdown-submenu>.submenu-level3 {
            position: absolute;
            left: 100%;
            top: 0;
            background-color: white;
            min-width: 590px;
            box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.1);
            opacity: 0;
            visibility: hidden;
            transform: translateX(10px);
            transition: all 0.3s ease;
            max-height: 0;
            overflow: hidden;
        }

        .dropdown-submenu:hover>.submenu-level3 {
            opacity: 1;
            visibility: visible;
            transform: translateX(0);
            max-height: 1000px;
        }

        .submenu-level3 li {
            border-bottom: 1px solid var(--border);
        }

        .submenu-level3 li:last-child {
            border-bottom: none;
        }

        .submenu-level3 li a {
            padding: 10px 20px;
            font-size: 0.9rem;
        }

        .submenu-level3 li a:hover {
            background-color: rgba(0, 60, 113, 0.05);
            padding-left: 25px;
        }

        /* Search Section */
        .search-container {
            background-color: var(--primary-light);
            padding: 15px 0;
        }

        .search-wrapper {
            display: flex;
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 4px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
        }

        .search-filter {
            position: relative;
            border-right: 1px solid var(--border);
            min-width: 140px;
            flex-shrink: 0;
        }

        .search-filter select {
            height: 48px;
            border: none;
            padding: 0 40px 0 15px;
            appearance: none;
            background: transparent;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            cursor: pointer;
            width: 100%;
        }

        .search-filter i {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary);
            pointer-events: none;
        }

        .search-box {
            flex-grow: 1;
            display: flex;
        }

        .search-box input {
            flex-grow: 1;
            border: none;
            padding: 12px 20px;
            outline: none;
            font-size: 16px;
        }

        .search-box button {
            background: var(--secondary);
            border: none;
            color: white;
            padding: 0 25px;
            cursor: pointer;
            transition: background 0.3s;
            font-weight: 500;
            flex-shrink: 0;
        }

        .search-box button:hover {
            background: #e55a29;
        }


        /* Banner Slider */
        .banner-slider {
            position: relative;
            height: 550px;
            overflow: hidden;
        }

        .banner-slider .banner-slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0;
            transition: opacity 1s ease-in-out;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
        }

        .banner-slider .banner-slide.active {
            opacity: 1;
            z-index: 1;
        }

        .video-banner {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }


        .video-container {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 1;
        }

        .video-container video {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .banner-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, rgba(0, 60, 113, 0.7) 0%, rgba(0, 60, 113, 0.3) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
        }

        .banner-content {
            text-align: center;
            max-width: 800px;
            padding: 0 30px;
            color: white;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
            z-index: 3;
        }

        .banner-content h2 {
            font-size: 3rem;
            margin-bottom: 20px;
            line-height: 1.2;
            font-weight: 700;
        }

        .banner-content p {
            font-size: 1.3rem;
            margin-bottom: 40px;
        }

                .slider-controls {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 10px;
            z-index: 10;
        }

        .slider-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.6);
            cursor: pointer;
            transition: all 0.3s;
        }

        .slider-dot.active {
            background-color: var(--secondary);
            transform: scale(1.2);
        }


        .btn {
            display: inline-block;
            padding: 14px 35px;
            background-color: var(--secondary);
            color: white;
            text-decoration: none;
            border-radius: 4px;
            font-weight: 600;
            font-size: 1.1rem;
            margin: 0 10px;
            transition: all 0.3s;
            border: none;
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .btn:hover {
            background-color: #e05a2d;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid white;
        }

        .btn-outline:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .slider-controls {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 10px;
            z-index: 10;
        }

        .play-button {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 70px;
            height: 70px;
            background-color: var(--secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            z-index: 3;
        }

        .play-button i {
            font-size: 1.8rem;
            color: white;
            margin-left: 5px;
        }

        .play-button:hover {
            transform: translate(-50%, -50%) scale(1.1);
            background-color: #e05a2d;
        }

      /* Footer */
        footer {
            background-color: var(--primary);
            color: white;
            padding-top: 70px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            padding-bottom: 50px;
        }

        .footer-col h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--secondary);
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 15px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-col ul li a:hover {
            color: white;
            padding-left: 5px;
        }

        .footer-col p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 20px;
        }

        .social-footer {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-footer a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            text-decoration: none;
            transition: all 0.3s;
        }

        .social-footer a:hover {
            background-color: var(--secondary);
            transform: translateY(-5px);
        }

        .footer-bottom {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 25px 0;
            text-align: center;
            margin-top: 50px;
        }

        .footer-bottom p {
            font-size: 0.95rem;
        }
        

                 /* Contact Section */
        .contact-section {
            padding: 80px 0;
        }
        
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }
        
        .contact-form h3 {
            font-size: 1.8rem;
            margin-bottom: 25px;
            color: var(--primary);
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: 4px;
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        
        .form-group textarea {
            height: 150px;
            resize: vertical;
        }
        
       .contact-section .contact-info {
            padding: 25px;
            background-color: rgba(0, 60, 113, 0.05);
            border-radius: 8px;
        }
        
        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 25px;
            color: var(--primary);
            position: relative;
            padding-bottom: 15px;
        }
        
        .contact-info h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--secondary);
            border-radius: 2px;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 25px;
        }
        
        .contact-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        
        .contact-icon i {
            font-size: 1.3rem;
            color: white;
        }
        
        .contact-details h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--dark);
        }
        
        .contact-details p {
            color: var(--gray);
            line-height: 1.6;
        }


                        /* Breadcrumb Styles */
        .breadcrumb {
            background: white;
            border-radius: 15px;
            padding: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            margin-bottom: 40px;
        }
        
        .breadcrumb-title {
            font-size: 1.4rem;
            color: #003c71;
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid #f0f4f8;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .breadcrumb-title i {
            background: rgba(0, 60, 113, 0.1);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: #003c71;
        }
        
        .breadcrumb-path {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
        }
        
        .breadcrumb-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .breadcrumb-link {
            color: #003c71;
            text-decoration: none;
            font-weight: 500;
            padding: 8px 15px;
            border-radius: 8px;
            transition: all 0.3s;
            position: relative;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .breadcrumb-link:hover {
            background: rgba(0, 60, 113, 0.05);
            color: #00294d;
        }
        
        .breadcrumb-link i {
            font-size: 0.9rem;
        }
        
        .breadcrumb-link.active {
            background: #003c71;
            color: white;
            pointer-events: none;
        }
        
        .breadcrumb-separator {
            color: #6a737d;
            font-size: 1.1rem;
            padding: 0 5px;
        }