:root {
            --primary-color: #1a3a5f;
            --secondary-color: #c19a6b;
            --accent-color: #2c5282;
            --light-bg: #f8f9fa;
            --dark-text: #333;
            --transition: all 0.3s ease;
        }
        body {
            font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
            color: var(--dark-text);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .section-header {
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-header h2 {
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }
        .section-header h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--secondary-color);
        }
        .section-subtitle {
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--primary-color);
            margin: 0 10px;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color);
        }
        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary-color);
            transition: var(--transition);
        }
        .nav-link:hover:after, .nav-link.active:after {
            width: 100%;
        }
        .hero {
            background: linear-gradient(rgba(26, 58, 95, 0.85), rgba(26, 58, 95, 0.9)), url('https://images.unsplash.com/photo-1560518883-ce09059eeffa?ixlib=rb-4.0.3&auto=format&fit=crop&w=2073&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 150px 0 100px;
            position: relative;
        }
        .hero h1 {
            color: white;
            font-size: 3.2rem;
            margin-bottom: 20px;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            max-width: 700px;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #b08a5d;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            height: 100%;
            transition: var(--transition);
            border: 1px solid #eee;
        }
        .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;
            line-height: 80px;
            border-radius: 50%;
            font-size: 2rem;
            margin: -40px auto 20px;
            display: block;
        }
        .service-card h4 {
            color: var(--primary-color);
            transition: var(--transition);
        }
        .service-card:hover h4 {
            color: var(--secondary-color);
        }
        .about-img {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }
        .stats-box {
            text-align: center;
            padding: 30px 20px;
            background: var(--light-bg);
            border-radius: 10px;
            transition: var(--transition);
        }
        .stats-box:hover {
            background: var(--primary-color);
            color: white;
        }
        .stats-box:hover h3, .stats-box:hover p {
            color: white;
        }
        .stats-box h3 {
            font-size: 2.5rem;
            margin-bottom: 5px;
            color: var(--secondary-color);
        }
        .case-study {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 30px;
        }
        .case-img {
            height: 300px;
            object-fit: cover;
            width: 100%;
            transition: transform 0.5s ease;
        }
        .case-study:hover .case-img {
            transform: scale(1.05);
        }
        .case-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(26, 58, 95, 0.9), transparent);
            color: white;
            padding: 30px;
            transform: translateY(20px);
            transition: var(--transition);
        }
        .case-study:hover .case-overlay {
            transform: translateY(0);
        }
        .news-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: var(--transition);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .news-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .news-date {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--secondary-color);
            color: white;
            padding: 8px 15px;
            border-radius: 5px;
            font-weight: 600;
        }
        .contact-info-box {
            text-align: center;
            padding: 30px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            height: 100%;
            transition: var(--transition);
        }
        .contact-info-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .contact-icon {
            width: 70px;
            height: 70px;
            line-height: 70px;
            background: var(--light-bg);
            color: var(--primary-color);
            border-radius: 50%;
            font-size: 1.8rem;
            margin: 0 auto 20px;
            display: block;
        }
        .contact-info-box:hover .contact-icon {
            background: var(--primary-color);
            color: white;
        }
        .flink {
            display: inline-block;
            background: var(--light-bg);
            padding: 10px 25px;
            margin: 5px 10px;
            border-radius: 50px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--primary-color);
            color: #bbb;
            padding-top: 60px;
        }
        footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--secondary-color);
        }
        footer a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 50px;
            padding: 20px 0;
            font-size: 0.9rem;
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            background: rgba(255,255,255,0.1);
            color: white;
            border-radius: 50%;
            margin-right: 10px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            line-height: 50px;
            text-align: center;
            background: var(--secondary-color);
            color: white;
            border-radius: 50%;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary-color);
        }
        @media (max-width: 768px) {
            .hero {
                padding: 100px 0 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        .form-control:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 0.25rem rgba(193, 154, 107, 0.25);
        }
        .progress {
            height: 8px;
            margin-bottom: 15px;
        }
        .progress-bar {
            background-color: var(--secondary-color);
        }