:root {
            --primary-color: #0a4a7a;
            --secondary-color: #d4af37;
            --accent-color: #2e7d32;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --text-light: #6c757d;
        }
        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: var(--dark-color);
            line-height: 1.8;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            margin: 0 0.5rem;
            color: var(--dark-color) !important;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
            border-bottom: 2px solid var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 74, 122, 0.85), rgba(10, 74, 122, 0.9)), url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 8rem 0 6rem;
            margin-top: 76px;
        }
        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 2.5rem;
            opacity: 0.9;
        }
        .section-padding {
            padding: 5rem 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            margin-bottom: 1.5rem;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            background: var(--primary-color);
            color: white;
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: -40px auto 1.5rem;
            font-size: 2rem;
            box-shadow: 0 4px 10px rgba(10, 74, 122, 0.3);
        }
        .project-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            height: 100%;
        }
        .project-card:hover {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .project-card img {
            transition: transform 0.5s ease;
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .news-card {
            border-left: 4px solid var(--primary-color);
            padding-left: 1.5rem;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            border-left-color: var(--secondary-color);
            background-color: rgba(10, 74, 122, 0.03);
        }
        .flink {
            display: inline-block;
            background: #f8f9fa;
            padding: 0.8rem 1.8rem;
            margin: 0.5rem;
            border-radius: 50px;
            color: var(--primary-color);
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(10, 74, 122, 0.2);
        }
        .contact-info {
            background: linear-gradient(135deg, var(--primary-color), #0d5fa3);
            color: white;
            padding: 3rem;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(10, 74, 122, 0.25);
        }
        .contact-icon {
            background: rgba(255, 255, 255, 0.2);
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-right: 1.5rem;
        }
        footer {
            background: var(--dark-color);
            color: #adb5bd;
            padding-top: 4rem;
        }
        .footer-links a {
            color: #ced4da;
            text-decoration: none;
            transition: color 0.3s;
            display: block;
            margin-bottom: 0.8rem;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary-color);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            color: var(--dark-color);
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.4rem;
            top: 0.5rem;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--secondary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .contact-info {
                padding: 2rem;
            }
        }