:root {
            --primary-color: #0a58ca;
            --secondary-color: #146c43;
            --accent-color: #ffc107;
            --light-color: #f8f9fa;
            --dark-color: #212529;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
        }
        .navbar {
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(10, 88, 202, 0.85), rgba(20, 108, 67, 0.8)), url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 100px 0;
            position: relative;
        }
        .service-card {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 10px;
            overflow: hidden;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: white;
            font-size: 28px;
        }
        .project-card {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            margin-bottom: 30px;
        }
        .project-card img {
            transition: transform 0.5s ease;
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .project-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(10, 88, 202, 0.85);
            color: white;
            padding: 15px;
            transform: translateY(100%);
            transition: transform 0.3s ease;
        }
        .project-card:hover .project-overlay {
            transform: translateY(0);
        }
        .contact-info {
            background: var(--light-color);
            border-radius: 10px;
            padding: 30px;
            height: 100%;
            transition: transform 0.3s ease;
        }
        .contact-info:hover {
            transform: translateY(-5px);
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            margin-bottom: 15px;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: var(--light-color);
            border-radius: 5px;
            text-decoration: none;
            color: var(--dark-color);
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary-color);
        }
        footer {
            background: #1a1a1a;
            color: #aaa;
        }
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(10, 88, 202, 0.1);
            color: var(--primary-color);
            font-weight: 600;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: #666;
        }
        .testimonial-card {
            background: white;
            border-radius: 10px;
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            height: 100%;
            position: relative;
        }
        .testimonial-card::before {
            content: "\201C";
            font-size: 4rem;
            color: var(--primary-color);
            opacity: 0.2;
            position: absolute;
            top: 10px;
            left: 20px;
        }
        .process-step {
            position: relative;
            padding: 30px;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            text-align: center;
            height: 100%;
        }
        .process-step .step-number {
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.5rem;
            margin: 0 auto 20px;
        }
        .material-card {
            border: 1px solid #dee2e6;
            border-radius: 8px;
            padding: 20px;
            transition: all 0.3s ease;
        }
        .material-card:hover {
            border-color: var(--primary-color);
            box-shadow: 0 5px 15px rgba(10, 88, 202, 0.1);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            font-weight: 600;
        }
        .btn-primary:hover {
            background-color: #084298;
            border-color: #084298;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(10, 88, 202, 0.3);
        }
        section {
            padding: 80px 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 50px;
            padding-bottom: 15px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 3px;
            background: var(--primary-color);
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }