:root {
            --primary-color: #0a3d62;
            --secondary-color: #1e90ff;
            --accent-color: #ff9f1a;
            --light-color: #f8f9fa;
            --dark-color: #2d3436;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.8;
            overflow-x: hidden;
            background-color: #fff;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        a {
            color: var(--secondary-color);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-color);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #082a46;
            border-color: #082a46;
            transform: translateY(-2px);
            box-shadow: var(--box-shadow);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 12px 30px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background-color: #0c7cd5;
            border-color: #0c7cd5;
            transform: translateY(-2px);
            box-shadow: var(--box-shadow);
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 50px 0;
            }
        }
        .section-title {
            position: relative;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title h2 {
            display: inline-block;
            padding-bottom: 15px;
            position: relative;
        }
        .section-title h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--accent-color);
        }
        .section-title p {
            max-width: 700px;
            margin: 20px auto 0;
            color: #666;
        }
        .card-hover {
            transition: var(--transition);
            border: none;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--accent-color);
        }
        .navbar {
            padding-top: 20px;
            padding-bottom: 20px;
            background-color: rgba(255, 255, 255, 0.95) !important;
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        .navbar.scrolled {
            padding-top: 10px;
            padding-bottom: 10px;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            margin: 0 8px;
            color: var(--dark-color) !important;
            position: relative;
        }
        .navbar-nav .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-color);
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover:after,
        .navbar-nav .nav-link.active:after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 61, 98, 0.85), rgba(10, 61, 98, 0.9)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2069&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 180px 0 120px;
            position: relative;
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 150px 0 80px;
                background-attachment: scroll;
            }
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 25px;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
        }
        .hero-subtitle {
            font-size: 1.2rem;
            margin-bottom: 35px;
            max-width: 700px;
            opacity: 0.9;
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(30, 144, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--secondary-color);
            font-size: 28px;
            transition: var(--transition);
        }
        .feature-item:hover .feature-icon {
            background-color: var(--secondary-color);
            color: white;
            transform: rotateY(180deg);
        }
        .stats-counter {
            background-color: var(--light-color);
            padding: 60px 0;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 10px;
            display: block;
        }
        .stat-label {
            font-size: 1.1rem;
            color: #666;
            font-weight: 600;
        }
        .service-card {
            padding: 40px 30px;
            text-align: center;
            border-radius: var(--border-radius);
            background-color: white;
            height: 100%;
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .service-card:hover {
            border-color: var(--secondary-color);
        }
        .service-icon {
            font-size: 48px;
            color: var(--secondary-color);
            margin-bottom: 25px;
        }
        .product-image {
            height: 250px;
            object-fit: cover;
            border-radius: var(--border-radius) var(--border-radius) 0 0;
            width: 100%;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 20px;
            border: 5px solid #f1f1f1;
            transition: var(--transition);
        }
        .team-member:hover .team-img {
            border-color: var(--secondary-color);
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 30px;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background-color: rgba(30, 144, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--secondary-color);
            margin-right: 20px;
            flex-shrink: 0;
        }
        .footer {
            background-color: var(--primary-color);
            color: rgba(255, 255, 255, 0.85);
            padding: 80px 0 30px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: var(--accent-color);
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            transition: var(--transition);
        }
        .social-links a:hover {
            background-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            margin-top: 60px;
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 12px 25px;
            margin: 0 15px 15px 0;
            border-radius: var(--border-radius);
            border: 1px solid #eaeaea;
            color: var(--dark-color);
            font-weight: 500;
            transition: var(--transition);
        }
        .flink:hover {
            background-color: var(--secondary-color);
            color: white;
            border-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }
        .news-card {
            height: 100%;
            transition: var(--transition);
        }
        .news-card:hover {
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            position: absolute;
            top: 15px;
            left: 15px;
            background-color: var(--primary-color);
            color: white;
            padding: 8px 15px;
            border-radius: var(--border-radius);
            font-size: 0.9rem;
            font-weight: 600;
        }
        .timeline {
            position: relative;
            max-width: 1000px;
            margin: 0 auto;
        }
        .timeline:before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background-color: #e0e0e0;
            transform: translateX(-50%);
        }
        @media (max-width: 768px) {
            .timeline:before {
                left: 30px;
            }
        }
        .timeline-item {
            position: relative;
            margin-bottom: 50px;
        }
        .timeline-content {
            position: relative;
            width: calc(50% - 40px);
            padding: 30px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .timeline-item:nth-child(odd) .timeline-content {
            margin-left: auto;
        }
        @media (max-width: 768px) {
            .timeline-content {
                width: calc(100% - 70px);
                margin-left: 70px !important;
            }
        }
        .timeline-content:after {
            content: '';
            position: absolute;
            top: 30px;
            width: 20px;
            height: 20px;
            background-color: white;
            transform: rotate(45deg);
        }
        .timeline-item:nth-child(even) .timeline-content:after {
            left: -10px;
        }
        .timeline-item:nth-child(odd) .timeline-content:after {
            right: -10px;
        }
        @media (max-width: 768px) {
            .timeline-content:after {
                left: -10px !important;
                right: auto !important;
            }
        }
        .timeline-dot {
            position: absolute;
            top: 30px;
            left: 50%;
            width: 20px;
            height: 20px;
            background-color: var(--secondary-color);
            border-radius: 50%;
            transform: translateX(-50%);
            z-index: 1;
            border: 4px solid white;
            box-shadow: 0 0 0 4px rgba(30, 144, 255, 0.2);
        }
        @media (max-width: 768px) {
            .timeline-dot {
                left: 30px;
            }
        }
        .map-container {
            height: 400px;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
        }
        .form-control, .form-select {
            padding: 15px;
            border-radius: var(--border-radius);
            border: 1px solid #ddd;
            transition: var(--transition);
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.25rem rgba(30, 144, 255, 0.25);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0;
            margin-bottom: 30px;
        }
        .breadcrumb-item a {
            color: var(--secondary-color);
        }
        .breadcrumb-item.active {
            color: #6c757d;
        }