:root {
            --primary-blue: #0a3d62;
            --secondary-gold: #d4af37;
            --accent-green: #27ae60;
            --dark-bg: #1a1a2e;
            --light-bg: #f8f9fa;
            --text-dark: #333;
            --text-light: #f8f9fa;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-blue);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98) !important;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-blue) !important;
        }
        .navbar-brand span {
            color: var(--secondary-gold);
        }
        .nav-link {
            font-weight: 600;
            margin: 0 0.5rem;
            color: var(--primary-blue) !important;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-gold) !important;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background: var(--secondary-gold);
            left: 0;
            bottom: 0;
            transition: width 0.3s;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue) 0%, #1a5276 100%);
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            width: 200%;
            height: 200%;
            top: -50%;
            left: -50%;
            background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 1px, transparent 1px);
            background-size: 30px 30px;
            animation: float 20s linear infinite;
        }
        @keyframes float {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.4rem;
            opacity: 0.9;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .btn-primary-custom {
            background: linear-gradient(to right, var(--secondary-gold), #f1c40f);
            border: none;
            color: var(--primary-blue);
            font-weight: 700;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            transition: all 0.3s ease;
            box-shadow: 0 6px 15px rgba(212, 175, 55, 0.4);
        }
        .btn-primary-custom:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px rgba(212, 175, 55, 0.6);
            color: var(--primary-blue);
        }
        .btn-outline-custom {
            border: 2px solid white;
            color: white;
            background: transparent;
            font-weight: 700;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            transition: all 0.3s ease;
        }
        .btn-outline-custom:hover {
            background: white;
            color: var(--primary-blue);
            transform: translateY(-5px);
        }
        .section-title {
            text-align: center;
            margin-bottom: 4rem;
            position: relative;
        }
        .section-title h2 {
            font-size: 2.8rem;
            display: inline-block;
            padding-bottom: 1rem;
        }
        .section-title h2::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 5px;
            background: var(--secondary-gold);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 3px;
        }
        .service-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem 2rem;
            height: 100%;
            transition: all 0.4s ease;
            border: 1px solid #eee;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 0;
            background: var(--accent-green);
            transition: height 0.5s ease;
        }
        .service-card:hover::before {
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        .service-icon {
            font-size: 3.5rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
            display: inline-block;
            transition: all 0.3s ease;
        }
        .service-card:hover .service-icon {
            color: var(--accent-green);
            transform: scale(1.1);
        }
        .feature-box {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
            height: 100%;
            border-left: 5px solid var(--secondary-gold);
            transition: transform 0.3s ease;
        }
        .feature-box:hover {
            transform: translateY(-10px);
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary-blue);
            line-height: 1;
        }
        .stat-label {
            font-size: 1.1rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .case-study-card {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            height: 100%;
            background: white;
        }
        .case-study-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        }
        .case-img {
            height: 250px;
            object-fit: cover;
            width: 100%;
            transition: transform 0.5s ease;
        }
        .case-study-card:hover .case-img {
            transform: scale(1.05);
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
            background: white;
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--primary-blue);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .team-member {
            text-align: center;
            padding: 2rem;
            border-radius: 15px;
            transition: all 0.3s ease;
        }
        .team-member:hover {
            background: white;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
            transform: translateY(-10px);
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 1.5rem;
            border: 5px solid #f1f1f1;
        }
        .contact-info-box {
            background: white;
            padding: 2rem;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
            height: 100%;
            text-align: center;
            border-top: 5px solid var(--secondary-gold);
            transition: all 0.3s ease;
        }
        .contact-info-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        .form-control-custom {
            border: 1px solid #ddd;
            border-radius: 10px;
            padding: 1rem;
            font-size: 1rem;
            transition: all 0.3s;
        }
        .form-control-custom:focus {
            border-color: var(--secondary-gold);
            box-shadow: 0 0 0 0.25rem rgba(212, 175, 55, 0.25);
        }
        footer {
            background: var(--dark-bg);
            color: var(--text-light);
            padding-top: 4rem;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.3rem;
        }
        .footer-links ul {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: all 0.3s;
        }
        .footer-links a:hover {
            color: var(--secondary-gold);
            padding-left: 5px;
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin-right: 10px;
            color: white;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background: var(--secondary-gold);
            transform: translateY(-5px);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 1.5rem 0;
            margin-top: 3rem;
            text-align: center;
            color: #aaa;
            font-size: 0.95rem;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 0.8rem 1.8rem;
            border-radius: 50px;
            margin: 0.5rem;
            color: var(--primary-blue);
            font-weight: 600;
            text-decoration: none;
            border: 2px solid #eee;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--primary-blue);
            color: white;
            border-color: var(--primary-blue);
            transform: translateY(-5px);
        }
        .friendlink {
            background: #f9f9f9;
            padding: 4rem 0;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-blue);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s ease;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-gold);
            color: var(--primary-blue);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .section-title h2 {
                font-size: 2.2rem;
            }
            .navbar-nav {
                text-align: center;
                background: white;
                padding: 1rem;
                border-radius: 10px;
                margin-top: 1rem;
            }
        }