:root {
            --primary-color: #1a1a2e;
            --secondary-color: #16213e;
            --accent-color: #0f3460;
            --highlight-color: #e94560;
            --light-color: #f5f5f5;
            --dark-color: #121212;
            --transition-speed: 0.3s;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--highlight-color);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--light-color) !important;
        }
        .navbar-brand span {
            color: var(--highlight-color);
        }
        .navbar {
            background-color: rgba(18, 18, 18, 0.95) !important;
            backdrop-filter: blur(10px);
            transition: all var(--transition-speed);
            padding: 1rem 0;
        }
        .navbar.scrolled {
            padding: 0.5rem 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .nav-link {
            font-weight: 600;
            margin: 0 0.5rem;
            color: var(--light-color) !important;
            transition: color var(--transition-speed);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--highlight-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(10, 10, 20, 0.85), rgba(16, 16, 30, 0.9)), url('https://images.unsplash.com/photo-1516035069371-29a1b244cc32?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            color: white;
            padding: 12rem 0 8rem;
            position: relative;
            overflow: hidden;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
        }
        .hero-subtitle {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2.5rem;
            opacity: 0.9;
        }
        .btn-primary-custom {
            background-color: var(--highlight-color);
            border-color: var(--highlight-color);
            color: white;
            padding: 0.8rem 2.2rem;
            font-weight: 600;
            border-radius: 4px;
            transition: all var(--transition-speed);
        }
        .btn-primary-custom:hover {
            background-color: #d43c55;
            border-color: #d43c55;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(233, 69, 96, 0.2);
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            height: 100%;
            transition: all var(--transition-speed);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border: 1px solid #eee;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--accent-color), var(--highlight-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: white;
            font-size: 2rem;
        }
        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            height: 300px;
        }
        .portfolio-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(transparent, rgba(10, 10, 20, 0.85));
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 1.5rem;
            color: white;
            opacity: 0;
            transition: opacity var(--transition-speed);
        }
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        .portfolio-item:hover .portfolio-img {
            transform: scale(1.05);
        }
        .team-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all var(--transition-speed);
            height: 100%;
        }
        .team-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
        }
        .news-card {
            border: none;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all var(--transition-speed);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            background: var(--highlight-color);
            color: white;
            display: inline-block;
            padding: 0.3rem 0.8rem;
            border-radius: 4px;
            font-size: 0.9rem;
            font-weight: 600;
        }
        .contact-info-box {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: all var(--transition-speed);
        }
        .contact-info-box:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
        .flink {
            display: inline-block;
            background: white;
            color: var(--primary-color);
            padding: 0.6rem 1.2rem;
            border-radius: 6px;
            margin: 0.5rem;
            text-decoration: none;
            font-weight: 600;
            transition: all var(--transition-speed);
            border: 1px solid #eee;
        }
        .flink:hover {
            background: var(--accent-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(15, 52, 96, 0.2);
        }
        .footer {
            background: var(--primary-color);
            color: #aaa;
            padding: 4rem 0 2rem;
        }
        .footer a {
            color: #ccc;
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        .footer a:hover {
            color: white;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--highlight-color);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--highlight-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition-speed);
            text-decoration: none;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: #d43c55;
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--highlight-color);
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 4px;
            background: var(--accent-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -2px;
        }
        @media (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
        }
        .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%;
        }
        @media (max-width: 768px) {
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
        }
        .timeline-content {
            padding: 20px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        .timeline-date {
            font-weight: 700;
            color: var(--highlight-color);
        }
        .process-step {
            text-align: center;
            padding: 2rem;
            background: white;
            border-radius: 10px;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all var(--transition-speed);
        }
        .process-step:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .step-number {
            width: 60px;
            height: 60px;
            background: var(--accent-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 auto 1.5rem;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.6;
            transition: all var(--transition-speed);
            max-width: 150px;
            height: auto;
        }
        .client-logo:hover {
            filter: grayscale(0%);
            opacity: 1;
        }
        .testimonial-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            height: 100%;
        }
        .testimonial-avatar {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 1rem;
            border: 3px solid var(--accent-color);
        }
        .form-control-custom {
            border: 1px solid #ddd;
            border-radius: 6px;
            padding: 0.8rem 1rem;
            transition: all var(--transition-speed);
        }
        .form-control-custom:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.25rem rgba(15, 52, 96, 0.25);
        }