:root {
            --primary-color: #1a365d;
            --secondary-color: #c6a34f;
            --accent-color: #2d5a8c;
            --light-color: #f8f9fa;
            --dark-color: #212529;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
            color: var(--dark-color);
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                        url('https://images.unsplash.com/photo-1586023492125-27b2c045efd7?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
        }
        .hero-subtitle {
            font-size: 1.3rem;
            opacity: 0.9;
            margin-bottom: 2rem;
        }
        .btn-primary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: #b5933e;
            border-color: #b5933e;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--secondary-color);
        }
        .service-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            height: 100%;
            border: none;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .project-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            margin-bottom: 30px;
        }
        .project-card img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .project-card:hover {
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .stats-section {
            background-color: var(--primary-color);
            color: white;
            padding: 80px 0;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary-color);
            margin-bottom: 10px;
        }
        .stat-title {
            font-size: 1.2rem;
            opacity: 0.9;
        }
        .testimonial-card {
            background-color: var(--light-color);
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin-bottom: 30px;
            height: 100%;
        }
        .testimonial-text {
            font-style: italic;
            margin-bottom: 20px;
        }
        .client-name {
            font-weight: 700;
            color: var(--primary-color);
        }
        .client-position {
            color: #666;
            font-size: 0.9rem;
        }
        .contact-info-card {
            background-color: var(--light-color);
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            height: 100%;
            transition: all 0.3s ease;
        }
        .contact-info-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding-top: 70px;
        }
        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-color: var(--secondary-color);
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        .footer-bottom {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            margin-top: 50px;
        }
        .friendlink {
            padding: 60px 0;
            background-color: #f9f9f9;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 10px 20px;
            margin: 0 10px 15px 0;
            border-radius: 5px;
            border: 1px solid #eee;
            transition: all 0.3s ease;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.8rem;
            }
            .hero-section {
                padding: 120px 0;
                min-height: 70vh;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .stat-number {
                font-size: 2.5rem;
            }
            .section-title {
                margin-bottom: 30px;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-section {
                padding: 80px 0;
                min-height: 60vh;
            }
        }
        .content-section {
            padding: 100px 0;
        }
        .content-section:nth-child(even) {
            background-color: #f9f9f9;
        }
        .content-image {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        .content-image img {
            width: 100%;
            height: auto;
            transition: transform 0.5s ease;
        }
        .content-image:hover img {
            transform: scale(1.03);
        }
        .process-step {
            text-align: center;
            padding: 30px 20px;
            position: relative;
        }
        .step-number {
            width: 60px;
            height: 60px;
            background-color: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 800;
            margin: 0 auto 20px;
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }