:root {
            --primary-color: #1a3a5f;
            --secondary-color: #c9a96e;
            --accent-color: #2c5282;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --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: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 58, 95, 0.85), rgba(26, 58, 95, 0.9)), url('https://images.unsplash.com/photo-1487956382158-bb926046304a?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 180px 0 120px;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.5rem; }
            .hero-section { padding: 150px 0 100px; }
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border: none;
            color: white;
            padding: 12px 30px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #b8975d;
            transform: translateY(-3px);
            box-shadow: var(--box-shadow);
            color: white;
        }
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            margin-bottom: 3rem;
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        .icon-box {
            background: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
            text-align: center;
        }
        .icon-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .icon-box i {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
        }
        .service-card, .project-card {
            border: none;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover, .project-card:hover {
            transform: translateY(-10px);
        }
        .service-card img, .project-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .service-card:hover img, .project-card:hover img {
            transform: scale(1.05);
        }
        .project-card .card-body {
            background-color: rgba(26, 58, 95, 0.9);
            color: white;
            position: absolute;
            bottom: 0;
            width: 100%;
            transform: translateY(100%);
            transition: var(--transition);
        }
        .project-card:hover .card-body {
            transform: translateY(0);
        }
        .stats-box {
            background: var(--primary-color);
            color: white;
            padding: 40px 20px;
            border-radius: var(--border-radius);
            text-align: center;
            transition: var(--transition);
        }
        .stats-box:hover {
            background: var(--accent-color);
        }
        .stats-box h3 {
            font-size: 3rem;
            color: white;
            margin-bottom: 0.5rem;
        }
        .contact-info-box {
            background: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            text-align: center;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            background: var(--light-color);
        }
        .contact-info-box i {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 1rem;
        }
        .flink {
            display: inline-block;
            background: var(--light-color);
            color: var(--primary-color);
            padding: 10px 25px;
            border-radius: 50px;
            margin: 8px;
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            border-color: var(--secondary-color);
            transform: translateY(-3px);
        }
        .footer {
            background-color: var(--primary-color);
            color: #ddd;
            padding: 80px 0 30px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: var(--secondary-color);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            margin-top: 40px;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--accent-color);
            color: white;
        }
        .news-card {
            border-left: 4px solid var(--secondary-color);
            transition: var(--transition);
        }
        .news-card:hover {
            border-left-color: var(--primary-color);
            box-shadow: var(--box-shadow);
        }