:root {
            --primary-color: #1a56db;
            --secondary-color: #7e3af2;
            --accent-color: #0694a2;
            --light-color: #f5f8ff;
            --dark-color: #1f2a37;
            --gray-color: #6b7280;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;base64,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');
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            transition: all 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            font-size: 30px;
        }
        .service-item {
            padding: 30px;
            border-radius: 12px;
            background: white;
            transition: all 0.3s ease;
            border: 1px solid #e5e7eb;
            height: 100%;
        }
        .service-item:hover {
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
            border-color: transparent;
            transform: translateY(-5px);
        }
        .stat-number {
            font-size: 3.5rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.6;
            transition: all 0.3s ease;
            padding: 15px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .navbar {
            padding: 20px 0;
            transition: all 0.3s ease;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(10px);
        }
        .navbar.scrolled {
            padding: 12px 0;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        .btn-primary {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border: none;
            padding: 12px 30px;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(26, 86, 219, 0.3);
        }
        .contact-info-item {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            margin-right: 15px;
            flex-shrink: 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f8fafc;
            border-radius: 6px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #e5e7eb;
        }
        .flink:hover {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: white;
            transform: translateY(-3px);
            border-color: transparent;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .news-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .news-date {
            position: absolute;
            top: 15px;
            right: 15px;
            background: rgba(255,255,255,0.95);
            padding: 8px 15px;
            border-radius: 6px;
            font-weight: 600;
            color: var(--primary-color);
        }
        .footer {
            background: var(--dark-color);
            color: #d1d5db;
            padding-top: 70px;
        }
        .footer a {
            color: #d1d5db;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid #374151;
            padding: 20px 0;
            margin-top: 50px;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            transform: translateY(-5px);
            color: white;
            box-shadow: 0 8px 20px rgba(26, 86, 219, 0.3);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0 60px;
            }
            .section-title {
                margin-bottom: 30px;
            }
            .stat-number {
                font-size: 2.5rem;
            }
        }