:root {
            --primary-color: #1a1a2e;
            --secondary-color: #16213e;
            --accent-color: #e63946;
            --gold-color: #d4af37;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Helvetica Neue', Arial, 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--dark-color);
            overflow-x: hidden;
        }
        .navbar {
            background-color: rgba(26, 26, 46, 0.95);
            padding: 1rem 0;
            transition: var(--transition);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: white !important;
            letter-spacing: 1px;
        }
        .navbar-brand span {
            color: var(--gold-color);
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.85) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem !important;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--gold-color) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--gold-color);
            bottom: 0;
            left: 50%;
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 70%;
            left: 15%;
        }
        .hero {
            background: linear-gradient(rgba(22, 33, 62, 0.85), rgba(26, 26, 46, 0.9)), url('https://images.unsplash.com/photo-1489599809516-9827b6d1cf13?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            min-height: 100vh;
            display: flex;
            align-items: center;
            color: white;
            padding: 120px 0 80px;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }
        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            max-width: 700px;
            text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
        }
        .btn-primary {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #c1121f;
            border-color: #c1121f;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(230, 57, 70, 0.3);
        }
        .btn-outline-light {
            padding: 0.75rem 2rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 100px;
            height: 4px;
            background: var(--gold-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        .service-card .card-icon {
            font-size: 3rem;
            color: var(--gold-color);
            margin-bottom: 1.5rem;
        }
        .project-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            transition: var(--transition);
            height: 100%;
            background: white;
        }
        .project-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .project-card img {
            height: 250px;
            object-fit: cover;
            transition: var(--transition);
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .team-card {
            text-align: center;
            padding: 2rem;
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            height: 100%;
        }
        .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        .team-card img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 1.5rem;
            border: 5px solid var(--light-color);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid #eee;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(26, 26, 46, 0.2);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 4rem 0 2rem;
        }
        footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: var(--gold-color);
            padding-left: 5px;
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            margin-right: 10px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--gold-color);
            transform: translateY(-5px);
        }
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .hero p {
                font-size: 1.1rem;
            }
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero {
                padding: 100px 0 60px;
                background-attachment: scroll;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 576px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .btn-primary, .btn-outline-light {
                padding: 0.6rem 1.5rem;
                font-size: 0.9rem;
            }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--gold-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
        }
        .timeline-content {
            padding: 20px;
            background-color: white;
            position: relative;
            border-radius: 6px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .contact-form input, .contact-form textarea {
            padding: 0.8rem 1rem;
            border: 1px solid #ddd;
            border-radius: 5px;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .contact-form input:focus, .contact-form textarea:focus {
            border-color: var(--gold-color);
            box-shadow: 0 0 0 0.2rem rgba(212, 175, 55, 0.25);
        }